Other Retirement Plans

Multi-Employer Pension Plans. Certain of MasTec’s subsidiaries contribute amounts to multi-employer pension and other multi-employer benefit plans and trusts. Multi-employer plan contribution rates are determined annually and assessed on a “pay-as-you-go” basis based on union employee payrolls. Union payrolls cannot be determined for future periods because the number of union employees employed at any given time, and the plans in which they may participate, vary depending upon the location and number of ongoing projects at a given time and the need for union resources in connection with those projects.

Total contributions to multi-employer pension plans, and the related number of employees covered by these plans, for the periods indicated ranged as follows (dollars in millions):



	Number of Employees		Contributions (in millions)
For the Three Months Ended September 30,	Low	High	Pension		Post-Retirement Benefit		Total
2013	2,392	2,734	$	14.8	$	1.0	$	15.8
2012	1,575	2,509	$	8.7	$	0.3	$	9.0
For the Nine Months Ended September 30,	Low	High	Pension		Post-Retirement Benefit		Total
2013	778	2,734	$	29.6	$	2.9	$	32.5
2012	308	2,509	$	21.1	$	0.8	$	21.9

The Company's contributions to multi-employer pension plans have increased for the nine month period ended September 30, 2013 as a result of higher activity levels, primarily in its oil and gas business.