# Filing Detail

Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0001437749-18-004857
Filing Date
2018-03-16
Accepted
2018-03-16 14:10:41
Documents
105
Period of Report
2017-12-31

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | FORM 10-K | nwpx20171231_10k.htm | 10-K | 1922866
2 | EXHIBIT 21.1 | ex_105498.htm | EX-21.1 | 1952
3 | EXHIBIT 23.1 | ex_105499.htm | EX-23.1 | 2880
4 | EXHIBIT 23.2 | ex_105500.htm | EX-23.2 | 2922
5 | EXHIBIT 31.1 | ex_105501.htm | EX-31.1 | 16974
6 | EXHIBIT 31.2 | ex_105502.htm | EX-31.2 | 16365
7 | EXHIBIT 32.1 | ex_105503.htm | EX-32.1 | 5818
8 | EXHIBIT 32.2 | ex_105504.htm | EX-32.2 | 5727
15 |  | totalreturngraph.jpg | GRAPHIC | 56582
| Complete submission text file | 0001437749-18-004857.txt |  | 9774061

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
9 | XBRL INSTANCE DOCUMENT | nwpx-20171231.xml | EX-101.INS | 2140372
10 | XBRL TAXONOMY EXTENSION SCHEMA | nwpx-20171231.xsd | EX-101.SCH | 88275
11 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE | nwpx-20171231_cal.xml | EX-101.CAL | 100650
12 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE | nwpx-20171231_def.xml | EX-101.DEF | 607016
13 | XBRL TAXONOMY EXTENSION LABEL LINKBASE | nwpx-20171231_lab.xml | EX-101.LAB | 548259
14 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE | nwpx-20171231_pre.xml | EX-101.PRE | 652058

Mailing Address 5721 SE COLUMBIA WAY SUITE 200 VANCOUVER WA 98661
Business Address 5721 SE COLUMBIA WAY SUITE 200 VANCOUVER WA 98661 3603976250
NORTHWEST PIPE CO (Filer) CIK: 0001001385 (see all company filings)

EIN.: 930557988 | State of Incorp.: OR | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 000-27140 | Film No.: 18695220
SIC: 3317 Steel Pipe & Tubes