15.	Employee Benefit Plans

The Company maintains

two

defined contribution profit-sharing plans

(401(k)

plans) covering substantially all non-union persons employed by the Company, whereby employees

may

contribute a percentage of compensation, limited to maximum allowed amounts under the Internal Revenue Code. The Plans provide for discretionary employer contributions, the level of which, if any,

may

vary by subsidiary and is determined annually by each company’s board of directors. The Company made aggregate matching contributions of

$1.8

million,

$1.8

million and

$1.3

million for the years ended

December

31,

2016,

2015

and

2014,

respectively.

As of

December

31,

2016,

the Company had approximately

1,684

employees, including

1,364

field personnel. Of our

1,364

field employees,

366,

22%

of total employees, were union members primarily in Nevada, Arizona, California and Hawaii and covered by collective bargaining agreements.

The Company contributes to a number of multi-employer defined benefit pension plans under the terms of collective-bargaining agreements that cover its union-represented employees. The risks of participating in these multi-employer plans are different from single-employer plans in the following aspects:

Assets contributed to the multi-employer plan by

one

employer

may

be used to provide benefits to employees of other participating employers. If a participating employer stops contributing to the plan, the unfunded obligations of the plan

may

be borne by the remaining participating employers.

If the Company chooses to stop participating in some of its multi-employer plans, the Company

may

be required to pay those plans an amount based on the underfunded status of the plan, referred to as a withdrawal liability.

The following table presents our participation in these plans (amounts in thousands):

	Pension Plan Employer	Pension Protection Act (“PPA”) Certified Zone Status 1		FIP / RP Status	Contributions						Surcharge Imposed	Expiration Date of Collective Bargaining Agreement 3
Pension Trust Fund	Identification Number	2016	2015	Pending / Implemented 2	2016		2015		2014
Pension Trust Fund for Operating Engineers Pension Plan	94-6090764	Red	Red	Yes	$	2,145	$	2,151	$	1,757	No	Various
Laborers Pension Trust for Northern California	94-6277608	Yellow	Yellow	Yes		1,059		966		1,447	No	Various
Carpenter Funds Administrative Office	94-6050970	Red	Red	Yes		636		842		1,015	No	Various
Cement Mason Pension Trust Fund For Northern California	94-6277669	Yellow	Yellow	Yes		311		371		322	No	Various
All other funds 4						8,487		10,204		6,267
				Total Contributions:	$	12,638	$	14,534	$	10,808

The most recent PPA zone status available in

2016

and

2015

is for the plan’s year-end during

2015

and

2014,

respectively. The zone status is based on information that we received from the plan and is certified by the plan’s actuary. Among other factors, plans in the red zone are generally less than

percent funded, plans in the orange zone are less than

percent funded and have an Accumulated Funding Deficiency in the current year or projected into the next

six

years, plans in the yellow zone are less than

percent funded and plans in the green zone are at least

percent funded.

Indicates whether the plan has a financial improvement plan (“FIP”) or a rehabilitation plan (“RP”) which is either pending or has been implemented.

Lists the expiration date(s) of the collective-bargaining agreement(s) to which the plans are subject.

These funds include multi-employer plans for pensions and other employee benefits. The total individually insignificant multi-employer pension costs contributed were

$1.2

million,

$1.5

million and

$0.9

million for

2016,

2015

and

2014,

respectively, and are included in the contributions to all other funds along with contributions to other types of benefit plans. Other employee benefits include certain coverage for medical, prescription drug, dental, vision, life and accidental death and dismemberment, disability and other benefit costs.

We currently have no intention of withdrawing from any of the multi-employer pension plans in which we participate.