The Company’s participation in multiemployer pension plans is summarized as follows:


	EIN/Pension Plan	Pension Protection Act Zone Status _(a)			Company Contributions						Expiration Date of
Plan Name	Number/ Registration Number	2018	2017	FIP/RP Status (a),(b)		2018		2017		2016	Collective Bargaining Agreement
Western Conference of Teamsters Pension Trust	91-6145047 - 001	Green	Green	Not applicable	$	4,399	$	4,191	$	3,420	12/31/2018 to 9/30/2021
Locals 302 & 612 of the IOUE - Employers Construction Industry Retirement Plan	91-6028571 - 001	Green	Green	Not applicable		284		275		252	9/30/2019
International Union of Operating Engineers Pension Trust	85512-1	Green as of 4/30/2017	Green as of 9/30/2015	Not applicable		224		219		120	3/31/2020 to 3/31/2021
Multi-Sector Pension Plan	1085653	Green	Green	Not applicable		191		228		112	12/31/2018
Local 813 Pension Trust Fund	13-1975659 - 001	Critical	Critical	Implemented		165		158		86	11/30/2019
Midwest Operating Engineers Pension Plan	36-6140097 - 001	Yellow for the plan year ended 3/31/17	Yellow as of 4/1/2016	Implemented		289		207		11	10/31/2020
Suburban Teamsters of Northern Illinois Pension Fund	36-6155778 - 001	Yellow	Yellow	Implemented		1,569		877		-	1/31/2019 to 2/28/2019
Teamster Local 301 Pension Fund	36-6492992 - 001	Green	Green	Not applicable		581		489		-	9/30/2018
Automobile Mechanics’ Local No. 701 Union and Industry Pension Fund	36-6042061 - 001	Yellow	Yellow	Implemented		484		837		-	12/31/2018
IAM National Pension Fund	51-6031295 - 002	Green	Green	Not applicable		240		215		-	12/31/2018
Local 731, I.B. of T., Private Scavengers and Garage Attendants Pension Trust Fund	36-6513567 - 001	Green as of 10/1/2016	Green as of 10/1/2015	Not applicable		4,600		4,342		-	9/30/2018
					$	13,026	$	12,038	$	4,001

______________________

(a)

Unless otherwise noted in the table above, the most recent Pension Protection Act zone status available in 2018 and 2017 is for the plans’ years ended December 31, 2017 and 2016, respectively.

(b)

The “FIP/RP Status” column indicates plans for which a Funding Improvement Plan (“FIP”) or a Rehabilitation Plan (“RP”) has been implemented.

(c)

A multiemployer defined benefit pension plan that has been certified as endangered, seriously endangered or critical may begin to levy a statutory surcharge on contribution rates. Once authorized, the surcharge is at the rate of 5% for the first 12 months and 10% for any periods thereafter, until certain conditions are met. The Company was not required to pay a surcharge to these plans during the years ended December 31, 2018 and 2017.