<SEC-DOCUMENT>0001104659-17-042710.txt : 20170630
<SEC-HEADER>0001104659-17-042710.hdr.sgml : 20170630
<ACCEPTANCE-DATETIME>20170630080036
ACCESSION NUMBER:		0001104659-17-042710
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20170630
ITEM INFORMATION:		Entry into a Material Definitive Agreement
ITEM INFORMATION:		Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20170630
DATE AS OF CHANGE:		20170630

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DAWSON GEOPHYSICAL CO
		CENTRAL INDEX KEY:			0000799165
		STANDARD INDUSTRIAL CLASSIFICATION:	OIL AND GAS FIELD EXPLORATION SERVICES [1382]
		IRS NUMBER:				742095844
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32472
		FILM NUMBER:		17940391

	BUSINESS ADDRESS:	
		STREET 1:		508 WEST WALL
		STREET 2:		SUITE 800
		CITY:			MIDLAND
		STATE:			TX
		ZIP:			79701
		BUSINESS PHONE:		4326843000

	MAIL ADDRESS:	
		STREET 1:		508 WEST WALL
		STREET 2:		SUITE 800
		CITY:			MIDLAND
		STATE:			TX
		ZIP:			79701

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TGC INDUSTRIES INC
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>a17-15169_18k.htm
<DESCRIPTION>8-K
<TEXT>


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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">UNITED STATES</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">SECURITIES AND EXCHANGE COMMISSION</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Washington, D.C. 20549</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">FORM&nbsp;8-K</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">CURRENT REPORT</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">Pursuant to Section&nbsp;13 or 15(d)</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">of the Securities Exchange Act of 1934</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date of report (date of earliest event reported): <b>June&nbsp;30, 2017</b></font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">DAWSON GEOPHYSICAL COMPANY</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Exact name of Registrant as specified in its charter)</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">TEXAS</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">001-32472</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">74-2095844</font></b></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(State of incorporation<br>   or organization)</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Commission file number)</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(I.R.S. employer identification   number)</font></p>    </td>   </tr>  </table>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">508 West Wall, Suite&nbsp;800</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Midland, Texas 79701</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Address of principal executive offices) (Zip Code)</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">(432) 684-3000</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Registrant&#146;s telephone number, including area code)</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Former name or former address, if changed since last report)</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Check the appropriate box below if the Form&nbsp;8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (<i>see</i> General Instruction A.2. below):</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;text-indent:.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font>&#160; Written communications pursuant to Rule&nbsp;425 under the Securities Act (17 CFR 230.425)</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;text-indent:.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font>&#160; Soliciting material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR 240.14a-12)</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;text-indent:.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font>&#160; Pre-commencement communications pursuant to Rule&nbsp;14d-2(b)&nbsp;under the Exchange Act<font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160; </font>(17 CFR 240.14d-2(b))</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;text-indent:.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font>&#160; Pre-commencement communications pursuant to Rule&nbsp;13e-4(c)&nbsp;under the Exchange Act<font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>(17 CFR 240.13e-4(c))</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule&nbsp;405 of the Securities Act of 1933 (&#167;230.405 of this chapter) or Rule&nbsp;12b-2 of the Securities Exchange Act of 1934 (&#167;240.12b-2 of this chapter).</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Emerging growth company </font><font face="Wingdings">o</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section&nbsp;13(a)&nbsp;of the Exchange Act. </font><font face="Wingdings">o</font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 1.01.</font></b><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b>Entry Into Material Definitive Agreements.</b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;">Amendment to Credit Facility</font></i></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On June&nbsp;30, 2017, Dawson Geophysical Company (the &#147;Company&#148;) entered into an amendment (the &#147;Amendment&#148;) to the Amended and Restated Loan and Security Agreement (as amended, the &#147;Amended Loan Agreement&#148;) for the purpose of amending and extending the Company&#146;s line of credit with its lender, Sovereign Bank, a Texas state bank (&#147;Sovereign Bank&#148;).&#160; The Amended Loan Agreement continues to provide for a revolving credit facility (the &#147;Revolving Credit Facility&#148;) in an amount up to the lesser of (i)&nbsp;$20,000,000 or (ii)&nbsp;a sum equal to (a)&nbsp;80% of the Company&#146;s eligible accounts receivable (less the outstanding principal balance of term loans and letters of credit under the Amended Loan Agreement) and (b)&nbsp;the lesser of (i)&nbsp;50% of the value of certain of the Company&#146;s core equipment or (ii)&nbsp;$12,500,000.&#160; The Revolving Credit Facility now matures on June&nbsp;30, 2018, which date was extended in the Amended Loan Agreement from a previous maturity of June&nbsp;30, 2017. As of this date, the Company has not borrowed any amounts under the Revolving Credit Facility.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The Company continues to be obligated to meet quarterly certain financial covenants, including maintaining a minimum tangible net worth. The Amended Loan Agreement now provides that the Company will maintain a required tangible net worth of not less than $125,000,000. The remaining terms and conditions of the Amended Loan Agreement generally continue in the form existing prior to the Amendment.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Additionally, on November&nbsp;23, 2016, the Company entered into a Twelfth Amendment to the Amended and Restated Loan and Security Agreement with Sovereign Bank (the &#147;Twelfth Amendment&#148;). The Twelfth Amendment clarified the date of issuance of a letter of credit issued by Sovereign Bank at the Company&#146;s request and amended the interest rate terms and the payment schedule thereof. A copy of the Twelfth Amendment is attached hereto as Exhibit&nbsp;10.2.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The foregoing descriptions of each of the Amendment and the Twelfth Amendment are qualified in their entirety by reference to the full text of the Amendment and the Twelfth Amendment, which are filed as Exhibit&nbsp;10.1 and Exhibit&nbsp;10.2, respectively, to this Current Report and are incorporated by reference herein.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 2.03.</font></b><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b>Creation of Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.</b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The information provided in item 1.01 of this Current Report on Form&nbsp;8-K is incorporated herein by reference.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt 1.0in;text-indent:-1.0in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 9.01.</font></b><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b>Financial Statements and Exhibits.</b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;text-indent:.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">(d)</font></b><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><i style="font-weight:bold;">Exhibits</i></b><b>.</b></p>
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<p style="margin:0in 0in .0001pt;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">EXHIBIT</font></b><b><font size="1" style="font-size:8.0pt;font-weight:bold;"><br>    </font></b><b><font size="1" style="font-size:8.0pt;font-weight:bold;">NUMBER</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">DESCRIPTION</font></b></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">10.1</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#151;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Thirteenth Amendment to Amended and Restated Loan and Security   Agreement, by and between Dawson Geophysical Company and Sovereign Bank,   dated June&nbsp;30, 2017</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="1%" valign="top" style="padding:0in 0in 0in 0in;width:1.82%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="5%" valign="top" style="padding:0in 0in 0in 0in;width:5.46%;">
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="1%" valign="top" style="padding:0in 0in 0in 0in;width:1.8%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="74%" valign="top" style="padding:0in 0in 0in 0in;width:74.5%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">10.2</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#151;</font></p>    </td>
<td width="1%" valign="top" style="padding:0in 0in 0in 0in;width:1.8%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Twelfth Amendment to Amended and Restated Loan and Security   Agreement, by and between Dawson Geophysical Company and Sovereign Bank,   dated November&nbsp;23, 2016</font></p>    </td>   </tr>  </table>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:center;">2<a name="PB_2_121039_7012"></a></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">SIGNATURES</font></b></p>
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<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">DAWSON GEOPHYSICAL COMPANY</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date: June&nbsp;30, 2017</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By: </font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ James K. Brata</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">James K. Brata</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Executive Vice President, Chief   Financial Officer, <br>   Secretary and Treasurer</font></p>    </td>   </tr>  </table>
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<p align="center" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:center;">3<a name="PB_3_121227_7056"></a></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">INDEX TO EXHIBITS</font></b></p>
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<p style="margin:0in 0in .0001pt;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">EXHIBIT</font></b><b><font size="1" style="font-size:8.0pt;font-weight:bold;"><br>    </font></b><b><font size="1" style="font-size:8.0pt;font-weight:bold;">NUMBER</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">DESCRIPTION</font></b></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">10.1</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.16%;">
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#151;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Thirteenth Amendment to Amended and Restated Loan and Security   Agreement, by and between Dawson Geophysical Company and Sovereign Bank,   dated June&nbsp;30, 2017</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.5%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.16%;">
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.5%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">10.2</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#151;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Twelfth Amendment to Amended and Restated Loan and Security   Agreement, by and between Dawson Geophysical Company and Sovereign Bank,   dated November&nbsp;23, 2016</font></p>    </td>   </tr>  </table>
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<p align="center" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:center;">4<a name="PB_4_121338_5335"></a></p>
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<p align="right" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:right;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Exhibit&nbsp;10.1</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">SOVEREIGN BANK &#151; LOAN NO. 1703864</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">THIRTEENTH AMENDMENT TO</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">THIS THIRTEENTH AMENDMENT TO AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT </font></b>(this &#147;<i><u style="font-style:italic;">Amendment</u></i>&#148;) dated as of <b>JUNE 30, 2017</b> (the<i> &#147;<u>Effective Date</u></i>&#148;), is by and between <b>SOVEREIGN BANK, </b>a Texas state bank (together with its successors and assigns, &#147;<i><u style="font-style:italic;">Lender</u></i>&#148;), and <b>DAWSON GEOPHYSICAL COMPANY, </b>a Texas corporation (&#147;<i><u style="font-style:italic;">Debtor</u></i>&#148;), formerly known as <b>TGC INDUSTRIES,&nbsp;INC.</b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;"><b><i><u><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;font-weight:bold;">RECITALS</font></u></i></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">WHEREAS, </font></b>Debtor and Lender entered into that certain <b>AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT </b>dated as of <b>SEPTEMBER 16, 2009 </b>(as amended, modified, and restated from time to time, the &#147;<i><u style="font-style:italic;">Agreement</u></i>&#148;), pursuant to which Lender agreed to make certain credit facilities available to Debtor on the terms and conditions set forth therein.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">WHEREAS</font></b>, the parties desire to amend the Agreement pursuant to the terms and conditions set forth herein.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">NOW THEREFORE</font></b>, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows:</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">1.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Defined Terms</u></b>. Capitalized terms used in this Amendment, to the extent not otherwise defined herein, shall have the same meanings as in the Agreement, as amended hereby. The term &#147;<i><u style="font-style:italic;">Maturity Date</u></i>&#148; as used in the Revolving Credit Note shall have the same meaning as Revolving Credit Maturity Date (as such term is defined in the Agreement).</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Amendment to Section&nbsp;2(a)&nbsp;of the Agreement</u></b>. <u>Section&nbsp;2(a)</u>&nbsp;of the Agreement is hereby deleted in its entirety and replaced with the following:</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt .5in;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(a)</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Establishment of Credit Facility</u></b><b>.</b> Subject to the terms and conditions set forth in this Agreement and the other Loan Documents, Lender hereby agrees to lend to Debtor under a credit facility (the &#147;<i><u style="font-style:italic;">Revolvin</u>g<u> Credit Facility</u></i>&#148;) an aggregate sum not to exceed the <i><u style="font-style:italic;">lesser</u></i> of: (i)&nbsp;an amount equal to the Borrowing Base; or (ii)&nbsp;<b>TWENTY MILLION AND NO/100 DOLLARS ($20,000,000.00) </b>(the &#147;<i><u style="font-style:italic;">Maximum Amount</u></i>&#148;), on a revolving basis from time to time during the period commencing on the date hereof and continuing until the earlier of: (i)&nbsp;the acceleration of the Indebtedness pursuant to the terms of the Loan Documents; or (ii)&nbsp;<b>JUNE 30, 2018 </b>(the earlier of such dates being the &#147;<i><u style="font-style:italic;">Revolving Credit Maturity Date</u></i>&#148;). If at any time the sum of the aggregate principal amount of Loans outstanding hereunder exceeds <i><u style="font-style:italic;">lesser</u></i> of the Maximum Amount or the Borrowing Base, such amounts shall be deemed an <i>&#147;<u>Overadvance</u>.&#148; </i>Debtor shall immediately repay the amount of such Overadvance <i><u style="font-style:italic;">plus</u></i> all accrued and unpaid interest thereon upon written demand from Lender. Notwithstanding anything contained herein to the contrary, an Overadvance shall be considered a Loan and shall bear interest at the Rate as set forth in the Revolving Credit Note and be secured by this Agreement. Subject to the terms and conditions hereof, Debtor may borrow, repay and reborrow funds under the Revolving Credit Facility up to the Revolving Credit Maturity Date.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Amendment to Section&nbsp;8(c)</u></b>. <u>Section&nbsp;8(c)</u>&nbsp;of the Agreement is hereby deleted in its entirety and replaced with the following:</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt .5in;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(c)</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Tangible Net Worth</u></b>. Debtor will maintain, as of the end of each calendar quarter, a Tangible Net Worth of not less than <b>ONE HUNDRED TWENTY-FIVE MILLION AND NO/100 DOLLARS ($125,000,000.00).</b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">THIRTEENTH AMENDMENT TO AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT &#151; PAGE 1</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">SOVEREIGN BANK &#151; DAWSON GEOPHYSICAL COMPANY</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Conditions Precedent</u></b>. The obligations of Lender under this Amendment shall be subject to the condition precedent that Debtor shall have executed and delivered to Lender this Amendment and such other documents and instruments incidental and appropriate to the transaction provided for herein as Lender or its counsel may reasonably request.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">5.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Payment Expenses</u></b>. Debtor agrees to pay all reasonable attorneys&#146; fees of Lender in connection with the drafting and execution of this Amendment.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">6.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Ratifications</u></b>. Except as expressly modified and superseded by this Amendment, the Agreement and the other Loan Documents are ratified and confirmed and continue in full force and effect. The Loan Documents, as modified by this Amendment, continue to be legal, valid, binding and enforceable in accordance with their respective terms. Without limiting the generality of the foregoing, Debtor hereby ratifies and confirms that all liens heretofore granted to Lender were intended to, do and continue to secure the full payment and performance of the indebtedness arising under the Loan Documents. Debtor agrees to perform such acts and duly authorize, execute, acknowledge, deliver, file and record such additional assignments, security agreements, modifications or agreements to any of the foregoing, and such other agreements, documents and instruments as Lender may reasonably request in order to perfect and protect those liens and preserve and protect the rights of Lender in respect of all present and future collateral. The terms, conditions and provisions of the Loan Documents (as the same may have been amended, modified or restated from time to time) are incorporated herein by reference, the same as if stated verbatim herein.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">7.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Representations, Warranties and Confirmations</u></b><b>.</b> Debtor hereby represents and warrants to Lender that: (a)&nbsp;this Amendment and any other Loan Documents to be delivered under this Amendment (if any) have been duly executed and delivered by Debtor, are valid and binding upon Debtor and are enforceable against Debtor in accordance with their terms, except as limited by any applicable bankruptcy, insolvency or similar laws of general application relating to the enforcement of creditors&#146; rights and except to the extent specific remedies may generally be limited by equitable principles; (b)&nbsp;no action of, or filing with, any governmental authority is required to authorize, or is otherwise required in connection with, the execution, delivery and performance by Debtor of this Amendment or any other Loan Document to be delivered under this Amendment; and (c)&nbsp;the execution, delivery and performance by Debtor of this Amendment and any other Loan Documents to be delivered under this Amendment do not require the consent of any other person and do not constitute a violation of any laws, agreements or understandings to which Debtor is a party or by which Debtor is bound.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">8.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Release</u></b>. Debtor hereby acknowledges and agrees that it knows of no defenses, counterclaims, offsets, cross-complaints, claims or demands of any kind or nature whatsoever to or against Lender or the terms and provisions of or the obligations of Debtor under the Loan Documents and the other agreements, instruments and documents evidencing, securing, governing, guaranteeing or pertaining thereto, and that Debtor has no right to seek affirmative relief or damages of any kind or nature from Lender with respect thereto. To the extent Debtor knows of any such defenses, counterclaims, offsets, cross-complaints, claims, demands or rights, Debtor hereby waives, and hereby knowingly and voluntarily releases and forever discharges Lender and its predecessors, officers, directors, agents, attorneys, employees, successors and assigns, from all possible claims, demands, actions, causes of action, defenses, counterclaims, offsets, cross-complaints, damages, costs, expenses and liabilities whatsoever with respect thereto, such waiver and release being with full knowledge and understanding of the circumstances and effects of such waiver and release and after having consulted legal counsel with respect thereto.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">9.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Multiple Counterparts</u></b>. This Amendment may be executed in a number of identical separate counterparts, each of which for all purposes is to be deemed an original, but all of which shall constitute, collectively, one agreement. Signature pages&nbsp;to this Amendment may be detached from multiple separate counterparts and attached to the same document and a telecopy or other facsimile of any such executed signature page&nbsp;shall be valid as an original.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">10.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Reference to Loan Documents</u></b>. Each of the Loan Documents, including the Agreement and any and all other agreements, documents, or instruments now or hereafter executed and delivered pursuant to the terms hereof containing a reference to any Loan Document shall mean and refer to such Loan Document as amended hereby.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">THIRTEENTH AMENDMENT TO AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT &#151; PAGE 2</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">SOVEREIGN BANK &#151; DAWSON GEOPHYSICAL COMPANY</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">11.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Severability</u></b>. Any provision of this Amendment held by a court of competent jurisdiction to be invalid or unenforceable shall not impair or invalidate the remainder of this Amendment and the effect thereof shall be confined to the provision so held to be invalid or unenforceable.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">12.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Headings</u></b>. The headings, captions, and arrangements used in this Amendment are for convenience only and shall not affect the interpretation of this Amendment.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;"><b><u><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">NOTICE OF FINAL AGREEMENT</font></u></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">THE AGREEMENT AND THE OTHER LOAN DOCUMENTS, AS THE SAME MAY&nbsp;BE AMENDED BY THIS AMENDMENT, REPRESENT THE FINAL AGREEMENT BETWEEN AND AMONG THE PARTIES AND MAY&nbsp;NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN AND AMONG THE PARTIES.</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;"><b><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;font-weight:bold;">REMAINDER OF PAGE LEFT INTENTIONALLY BLANK</font></i></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">THIRTEENTH AMENDMENT TO AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT &#151; PAGE 3</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">SOVEREIGN BANK &#151; DAWSON GEOPHYSICAL COMPANY</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">IN WITNESS WHEREOF</font></b>, the parties have caused this Amendment to be duly executed as of the Effective Date.</p>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><b><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;font-weight:bold;">LENDER:</font></i></b></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><b><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;font-weight:bold;">ADDRESS:</font></i></b></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">SOVEREIGN BANK</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">6060 Sherry Lane</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Dallas, TX 75225</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>    </td>
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<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ </font>Stephanie   Baird Velasquez</p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Name:</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Stephanie Baird Velasquez</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Area President</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><b><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;font-weight:bold;">With   copies of notices to:</font></i></b></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">GARDERE WYNNE SEWELL LLP</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.5%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2021 McKinney Avenue,   Suite&nbsp;1600</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Dallas, TX 75201</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.5%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Attention: Steven S. Camp</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.5%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><b><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;font-weight:bold;">DEBTOR:</font></i></b></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><b><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;font-weight:bold;">ADDRESS:</font></i></b></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.5%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">DAWSON GEOPHYSICAL COMPANY</font></p>    </td>
<td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.5%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">101 E. Park Blvd., Suite&nbsp;955</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.5%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Plano, TX 75074</font></p>    </td>   </tr>
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<td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.5%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ Wayne Whitener</font></p>    </td>
<td width="5%" valign="top" style="padding:0in 0in 0in 0in;width:5.34%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.5%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>   </tr>
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<td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.5%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Name:</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Wayne Whitener</font></p>    </td>
<td width="5%" valign="top" style="padding:0in 0in 0in 0in;width:5.34%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.5%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>   </tr>
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<td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.5%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Title:</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Executive Vice Chairman</font></p>    </td>
<td width="5%" valign="top" style="padding:0in 0in 0in 0in;width:5.34%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.5%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>   </tr>  </table>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">THIRTEENTH AMENDMENT TO AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT &#151; PAGE 4</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">SOVEREIGN BANK &#151; DAWSON GEOPHYSICAL COMPANY</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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<p align="right" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:right;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Exhibit&nbsp;10.2</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">TWELFTH AMENDMENT TO AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">AND AMENDMENT TO LETTER OF CREDIT NOTE</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">THIS TWELFTH AMENDMENT TO AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT AND AMENDMENT TO LETTER OF CREDIT NOTE </font></b>(this &#147;<i><u style="font-style:italic;">Amendment</u></i>&#148;) dated as of <b>NOVEMBER 23, 2016 </b>(the &#147;<i><u style="font-style:italic;">Effective Date</u></i>&#148;), is by and between <b>SOVEREIGN BANK</b>, a Texas state bank (together with its successors and assigns, &#147;<i><u style="font-style:italic;">Lender</u></i>&#148;), and <b>DAWSON GEOPHYSICAL COMPANY</b>, a Texas corporation (&#147;<i><u style="font-style:italic;">Debtor</u></i>&#148;), formerly known as <b>TGC INDUSTRIES,&nbsp;INC.</b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;"><b><i><u><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;font-weight:bold;">RECITALS</font></u></i></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">WHEREAS</font></b>, Debtor and Lender entered into that certain <b>AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT </b>dated as of <b>SEPTEMBER 16, 2009 </b>(as amended, modified, and restated from time to time, the &#147;<i><u style="font-style:italic;">Agreement</u></i>&#148;), pursuant to which Lender agreed to make certain credit facilities available to Debtor on the terms and conditions set forth therein.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">WHEREAS</font></b>, in connection with the Agreement, Debtor executed that certain <b>PROMISSORY NOTE </b>dated as of <b>SEPTEMBER 30, 2016 </b>in the original notational amount of <b>ONE MILLION SEVEN HUNDRED SIXTY-SEVEN THOUSAND ONE HUNDRED FIFTEEN AND NO/100 DOLLARS ($1,767,115.00)</b>, payable to the order of Lender (as amended, modified or restated from time to time, the &#147;<i><u style="font-style:italic;">Letter of Credit Note</u></i>&#148;)</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">WHEREAS</font></b>, the parties desire to amend the Agreement and the Letter of Credit Note pursuant to the terms and conditions set forth herein.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">NOW THEREFORE</font></b>, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows:</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">1.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Amendment to Section&nbsp;2(f)(i)&nbsp;of the Agreement</u></b>. <u>Section&nbsp;2(f)(i)</u>&nbsp;of the Agreement is hereby deleted in its entirety and replaced with the following:</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt .5in;punctuation-wrap:simple;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(i)</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Debtor hereby requests Lender to issue the Letter of Credit. Subject to the terms and conditions set forth in this Agreement and the other Loan Documents, Lender hereby agrees to issue the Letter of Credit on <b>NOVEMBER 23, 2015</b>. Each advance by Lender pursuant to a drawing under the Letter of Credit (severally and collectively, a &#147;<i><u style="font-style:italic;">Letter of Credit Advance</u></i>&#148;) is due and payable on the date that is <b>THIRTY (30) </b>days after such drawing date in accordance with Debtor&#146;s <b>PROMISSORY NOTE </b>dated <b>SEPTEMBER 30, 2016 </b>in the face amount of <b>ONE MILLION SEVEN HUNDRED SIXTY-SEVEN THOUSAND ONE HUNDRED FIFTEEN AND NO/100 DOLLARS ($1,767,115.00) </b>(as amended, restated or otherwise modified from time to time, the &#147;<i><u style="font-style:italic;">Letter of Credit Note</u></i>&#148;), and will be charged by Lender as (and will be deemed to be) a loan by Lender as of the day and time such payment is made by Lender and in the amount of such payment. Debtor shall pay Lender an Issuance Fee of $17,671.15 upon issuance of the Letter of Credit.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Amendment to Section&nbsp;1 of the Letter of Credit Note</u></b>. <u>Section&nbsp;1</u> of the Letter of Credit Note is hereby deleted in its entirety and replaced with the following:</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt .5in;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">1.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Rate</u></b>. Prior to the Maturity Date or an Event of Default, the Rate shall be the <b><u style="font-weight:bold;">LESSER</u></b> of: (a)&nbsp;the <b>MAXIMUM RATE</b>; (b)&nbsp;<b>FOUR AND ONE-HALF OF ONE PERCENT (4.50%)</b>; or (b)&nbsp;the <b><u style="font-weight:bold;">GREATER</u></b> of (i)&nbsp;the <b>PRIME RATE</b>, or (ii)&nbsp;<b>TWO AND ONE-HALF OF ONE PERCENT (2.50%) </b>(the interest rate floor). From and after the Maturity Date, the Rate shall be the Maturity Rate. The term &#147;<i><u style="font-style:italic;">Prime Rate</u></i>&#148; means a variable rate of interest per annum equal to the prime rate as published from time to time in the &#147;<u>Money Rates</u>&#148; table of <i>The Wall Street Journal</i>. If such prime rate, as so quoted, is split between two or more different interest rates, then the Prime Rate shall be the highest of such interest rates. If the prime rate is no longer published in the &#147;<u>Money Rates</u>&#148; table of <i>The Wall Street Journal</i>, then the Prime Rate shall be: (a)&nbsp;the rate of interest per annum established from time to time by Lender and designated as its</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">TWELFTH AMENDMENT TO AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT AND AMENDMENT TO LETTER OF CREDIT NOTE &#151; PAGE 1</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">SOVEREIGN BANK &#151; DAWSON GEOPHYSICAL COMPANY</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt .5in;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">base or prime rate, which may not necessarily be the lowest rate charged by Lender and is set by Lender in its sole discretion; or (b)&nbsp;if Lender does not publish or announce a base or prime rate, or does so infrequently or sporadically, then the Prime Rate shall be determined by reference to another base rate, prime rate, or similar lending rate index, generally accepted on a national basis, as selected by Lender in its sole and absolute discretion. Notwithstanding any provision of this Note or any other agreement or commitment between Debtor and Lender, whether written or oral, express or implied, Lender shall never be entitled to charge, receive or collect, nor shall amounts received hereunder be credited so that Lender shall be paid, as interest a sum greater than interest at the Maximum Rate. It is the intention of the parties that this Note, and all instruments securing the payment of this Note or executed or delivered in connection therewith, shall comply with applicable law. If Lender ever contracts for, charges, receives or collects anything of value which is deemed to be interest under applicable law, and if the occurrence of any circumstance or contingency, whether acceleration of maturity of this Note, prepayment of this Note, delay in advancing proceeds of this Note or any other event, should cause such interest to exceed the Maximum Rate, any amount which exceeds interest at the Maximum Rate shall be applied to the reduction of the unpaid principal balance of this Note or any other Indebtedness, and if this Note and such other Indebtedness are paid in full, any remaining excess shall be paid to Debtor. In determining whether the interest exceeds interest at the Maximum Rate, the total amount of interest shall be spread, prorated and amortized throughout the entire term of this Note until its payment in full. The term &#147;<i><u style="font-style:italic;">Maximum Rate</u></i>&#148; as used in this Note means the maximum nonusurious rate of interest per annum permitted by whichever of applicable United States federal law or Texas law permits the higher interest rate, including to the extent permitted by applicable law, any amendments thereof hereafter or any new law hereafter coming into effect to the extent a higher Maximum Rate is permitted thereby. If at any time the Rate shall exceed the Maximum Rate, the Rate shall be automatically limited to the Maximum Rate until the total amount of interest accrued hereunder equals the amount of interest which would have accrued if there had been no limitation to the Maximum Rate. To the extent, if any, that Chapter 303 of the Texas Finance Code, as amended, (the &#147;<i><u style="font-style:italic;">Act</u></i>&#148;) is relevant to Lender for purposes of determining the Maximum Rate, the parties elect to determine the Maximum Rate under the Act pursuant to the &#147;weekly ceiling&#148; from time to time in effect, as referred to and defined in &#167;303.001-303.016 of the Act; subject, however, to any right Lender subsequently may have under applicable law to change the method of determining the Maximum Rate.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Amendment to Section&nbsp;3 of the Letter of Credit Note</u></b>. <u>Section&nbsp;3</u> of the Letter of Credit Note is hereby deleted in its entirety and replaced with the following:</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt .5in;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Payment Schedule</u></b>. Debtor agrees to pay Lender (without setoff) the amount of any draft or request for payment Lender has honored or will honor purporting to be drawn or made on the Letter of Credit (the amount of such draft being the &#147;<i><u style="font-style:italic;">Principal Balance</u></i>&#148;) at its offices as set forth herein, or at such other place as may be designated by Lender, on or before the <b><u style="font-weight:bold;">EARLIER</u></b> of: (i)&nbsp;the date that is <b>THIRTY (30) </b>days after the date Lender honors any such draft or request for payment; or (ii)&nbsp;<b>NOVEMBER 23, 2017</b>. Except as expressly provided herein to the contrary, all payments under this Note shall be applied in the following order of priority: (i)&nbsp;the payment or reimbursement of any expenses, costs or obligations (other than the Principal Balance and interest thereon) for which either Debtor shall be obligated or Lender shall be entitled pursuant to the provisions of this Note or the Loan Agreement; (ii)&nbsp;the payment of accrued but unpaid interest on the Principal Balance; and (iii)&nbsp;the payment of all or any portion of the Principal Balance hereof then outstanding hereunder. If an Event of Default exists, then Lender may, at the sole option of Lender, apply any such payments, at any time and from time to time, to any of the items specified in clauses (i), (ii)&nbsp;or (iii)&nbsp;above without regard to the order of priority otherwise specified herein. If any payment of principal or interest on this Note shall become due on a day other than a Business Day, such payment shall be made on the next succeeding Business Day and such extension of time shall be included in computing interest in connection with such payment. Notwithstanding anything herein to the contrary, if requested by Lender, Debtor shall pay such Principal Balance in advance of the date Lender is to honor the draft or request for payment. Debtor shall pay such amount in good funds at Lender&#146;s address indicated in this Note.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">TWELFTH AMENDMENT TO AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT AND AMENDMENT TO LETTER OF CREDIT NOTE &#151; PAGE 2</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">SOVEREIGN BANK &#151; DAWSON GEOPHYSICAL COMPANY</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Grant of Security Interest</u></b>. Lender and Debtor agree that: (a)&nbsp;a separate and distinct portion of the Collateral shall secure the Revolving Credit Facility; (b)&nbsp;a separate and distinct portion of the Collateral shall secure the Term Loan Facility; and (c)&nbsp;a separate and district portion of the Collateral shall secured the Letter of Credit. Accordingly, as collateral security for the prompt payment in full when due (whether at stated maturity, by acceleration or otherwise) of the Indebtedness arising under the Revolving Credit Facility, Debtor hereby re-pledges to and re-grants Lender, a security interest in, all of Debtor&#146;s right, title and interest in the RLOC Equipment and the Collateral described in <u>Sections 1(d)(i)</u>, <u>(iii)</u>&nbsp;and <u>(iv)</u>&nbsp;of the Agreement, whether now owned by Debtor or hereafter acquired and whether now existing or hereafter coming into existence. As collateral security for the prompt payment in full when due (whether at stated maturity, by acceleration or otherwise) of the Indebtedness arising under the Term Loan Facility, Debtor hereby pledges to and grants Lender, and re-pledges to and re-grants Lender, a security interest in, all of Debtor&#146;s right, title and interest in the Geospace Equipment and the Collateral described in <u>Section&nbsp;1(d)(iii)</u>&nbsp;and <u>(iv)</u>&nbsp;of the Agreement, whether now owned by Debtor or hereafter acquired and whether now existing or hereafter coming into existence. As collateral security for the prompt payment in full when due (whether at stated maturity, by acceleration or otherwise) of the Indebtedness arising under the Letter of Credit, Debtor hereby pledges to and grants Lender, and re-pledges to and re-grants Lender, a security interest in, all of Debtor&#146;s right, title and interest in the Letter of Credit Equipment and the Collateral described in <u>Section&nbsp;1(d)(iii)</u>&nbsp;and <u>(iv)</u>&nbsp;of the Agreement, whether now owned by Debtor or hereafter acquired and whether now existing or hereafter coming into existence.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">5.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Conditions Precedent</u></b>. The obligations of Lender under this Amendment shall be subject to the condition precedent that Debtor shall have executed and delivered to Lender this Amendment and such other documents and instruments incidental and appropriate to the transaction provided for herein as Lender or its counsel may reasonably request, including, without limitation, the Letter of Credit Note.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">6.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Payment Expenses</u></b>. Debtor agrees to pay all reasonable attorneys&#146; fees of Lender in connection with the drafting and execution of this Amendment.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">7.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Ratifications</u></b>. Except as expressly modified and superseded by this Amendment, the Agreement, the Letter of Credit Note and the other Loan Documents are ratified and confirmed and continue in full force and effect. The Loan Documents, as modified by this Amendment, continue to be legal, valid, binding and enforceable in accordance with their respective terms. Without limiting the generality of the foregoing, Debtor hereby ratifies and confirms that all liens heretofore granted to Lender were intended to, do and continue to secure the full payment and performance of the indebtedness arising under the Loan Documents. Debtor agrees to perform such acts and duly authorize, execute, acknowledge, deliver, file and record such additional assignments, security agreements, modifications or agreements to any of the foregoing, and such other agreements, documents and instruments as Lender may reasonably request in order to perfect and protect those liens and preserve and protect the rights of Lender in respect of all present and future collateral. The terms, conditions and provisions of the Loan Documents (as the same may have been amended, modified or restated from time to time) are incorporated herein by reference, the same as if stated verbatim herein.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">8.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Representations, Warranties and Confirmations</u></b>. Debtor hereby represents and warrants to Lender that: (a)&nbsp;this Amendment and any other Loan Documents to be delivered under this Amendment (if any) have been duly executed and delivered by Debtor, are valid and binding upon Debtor and are enforceable against Debtor in accordance with their terms, except as limited by any applicable bankruptcy, insolvency or similar laws of general application relating to the enforcement of creditors&#146; rights and except to the extent specific remedies may generally be limited by equitable principles; (b)&nbsp;no action of, or filing with, any governmental authority is required to authorize, or is otherwise required in connection with, the execution, delivery and performance by Debtor of this Amendment or any other Loan Document to be delivered under this Amendment; and (c)&nbsp;the execution, delivery and performance by Debtor of this Amendment and any other Loan Documents to be delivered under this Amendment do not require the consent of any other person and do not constitute a violation of any laws, agreements or understandings to which Debtor is a party or by which Debtor is bound.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">9.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Release</u></b>. Debtor hereby acknowledges and agrees that it knows of no defenses, counterclaims, offsets, cross-complaints, claims or demands of any kind or nature whatsoever to or against Lender or the terms and provisions of or the obligations of Debtor under the Loan Documents and the other agreements, instruments and documents evidencing, securing, governing, guaranteeing or pertaining thereto, and that Debtor has no right to seek</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">TWELFTH AMENDMENT TO AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT AND AMENDMENT TO LETTER OF CREDIT NOTE &#151; PAGE 3</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">SOVEREIGN BANK &#151; DAWSON GEOPHYSICAL COMPANY</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">affirmative relief or damages of any kind or nature from Lender with respect thereto. To the extent Debtor knows of any such defenses, counterclaims, offsets, cross-complaints, claims, demands or rights, Debtor hereby waives, and hereby knowingly and voluntarily releases and forever discharges Lender and its predecessors, officers, directors, agents, attorneys, employees, successors and assigns, from all possible claims, demands, actions, causes of action, defenses, counterclaims, offsets, cross-complaints, damages, costs, expenses and liabilities whatsoever with respect thereto, such waiver and release being with full knowledge and understanding of the circumstances and effects of such waiver and release and after having consulted legal counsel with respect thereto.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">10.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Multiple Counterparts</u></b>. This Amendment may be executed in a number of identical separate counterparts, each of which for all purposes is to be deemed an original, but all of which shall constitute, collectively, one agreement. Signature pages&nbsp;to this Amendment may be detached from multiple separate counterparts and attached to the same document and a telecopy or other facsimile of any such executed signature page&nbsp;shall be valid as an original.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">11.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Reference to Loan Documents</u></b>. Each of the Loan Documents, including the Agreement, the Letter of Credit Note and any and all other agreements, documents, or instruments now or hereafter executed and delivered pursuant to the terms hereof containing a reference to any Loan Document shall mean and refer to such Loan Document as amended hereby.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">12.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Severability</u></b>. Any provision of this Amendment held by a court of competent jurisdiction to be invalid or unenforceable shall not impair or invalidate the remainder of this Amendment and the effect thereof shall be confined to the provision so held to be invalid or unenforceable.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">13.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><u style="font-weight:bold;">Headings</u></b>. The headings, captions, and arrangements used in this Amendment are for convenience only and shall not affect the interpretation of this Amendment.</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;"><b><u><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">NOTICE OF FINAL AGREEMENT</font></u></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">THE AGREEMENT AND THE OTHER LOAN DOCUMENTS, AS THE SAME MAY&nbsp;BE AMENDED BY THIS AMENDMENT, REPRESENT THE FINAL AGREEMENT BETWEEN AND AMONG THE PARTIES AND MAY&nbsp;NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN AND AMONG THE PARTIES.</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;"><b><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;font-weight:bold;">REMAINDER OF PAGE LEFT INTENTIONALLY BLANK</font></i></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">TWELFTH AMENDMENT TO AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT AND AMENDMENT TO LETTER OF CREDIT NOTE &#151; PAGE 4</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">SOVEREIGN BANK &#151; DAWSON GEOPHYSICAL COMPANY</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;text-indent:.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">IN WITNESS WHEREOF</font></b>, the parties have caused this Amendment to be duly executed as of the date first written above.</p>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><b><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;font-weight:bold;">LENDER:</font></i></b></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><b><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;font-weight:bold;">ADDRESS:</font></i></b></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">SOVEREIGN BANK</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">6060 Sherry Lane</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Dallas, TX 75225</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>    </td>
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<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ </font>Stephanie   Baird Velasquez</p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Stephanie Baird Velasquez</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Title:</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Area President</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><b><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;font-weight:bold;">With   copies of notices to:</font></i></b></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">GARDERE WYNNE SEWELL LLP</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2021 McKinney Avenue,   Suite&nbsp;1600</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Dallas, TX 75201</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Attention: Steven S. Camp</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><b><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;font-weight:bold;">DEBTOR:</font></i></b></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><b><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;font-weight:bold;">ADDRESS:</font></i></b></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">DAWSON GEOPHYSICAL COMPANY</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">101 E. Park Blvd., Suite&nbsp;955</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Plano, TX 75074</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>    </td>
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<p style="font-size:10.0pt;margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ </font>Wayne   Whitener</p>    </td>
<td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.78%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.22%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>   </tr>
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<td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.5%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Name:</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Wayne Whitener</font></p>    </td>
<td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.78%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.22%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>   </tr>
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<td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.5%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Title:</font></p>    </td>
<td width="42%" valign="top" style="padding:0in 0in 0in 0in;width:42.5%;">
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Executive Vice Chairman</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>   </tr>  </table>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">TWELFTH AMENDMENT TO AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT AND AMENDMENT TO LETTER OF CREDIT NOTE &#151; PAGE 5</font></p>
<p style="margin:0in 0in .0001pt;punctuation-wrap:simple;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">SOVEREIGN BANK &#151; DAWSON GEOPHYSICAL COMPANY</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<div style="margin:0in 0in .0001pt;"><hr size="3" width="100%" noshade align="left" style="color:#010101;"></div>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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