6. Commitments and Contingencies

Letters of Credit

As of September 30, 2015 and December 31, 2014, the Company had irrevocable standby letters of credit outstanding of approximately $19.3 million, including $17.5 million related to the Company’s payment obligation under its insurance programs and approximately $1.8 million related to contract performance obligations.

Leases

The Company leases real estate, construction equipment and office equipment under operating leases with remaining terms ranging from one to six years. As of September 30, 2015, future minimum lease payments for operating leases were as follows: $0.4 million for the remainder of 2015, $1.2 million for 2016, $0.7 million for 2017, $0.6 million for 2018, $0.4 million for 2019 and $0.2 million thereafter.

Purchase Commitments

As of September 30, 2015, the Company had approximately $1.2 million in outstanding purchase orders for certain construction equipment, with cash outlay requirements scheduled to occur over the next three months.

Insurance and Claims Accruals

The Company carries insurance policies, which are subject to certain deductibles, for workers’ compensation, general liability, automobile liability and other coverages. The deductible per occurrence for each line of coverage is up to $1.0 million, except for certain of the Company’s health benefit plans, which are subject to a $0.1 million deductible for qualified individuals. Losses up to the deductible amounts are accrued based upon the Company’s estimates of the ultimate liability for claims reported and an estimate of claims incurred but not yet reported.

The insurance and claims accruals are based on known facts, actuarial estimates and historical trends. While recorded accruals are based on the ultimate liability, which includes amounts in excess of the deductible, a corresponding receivable for amounts in excess of the deductible is included in current assets in the consolidated balance sheets.

Performance and Payment Bonds

In certain circumstances, the Company is required to provide performance and payment bonds in connection with its future performance on certain contractual commitments. The Company has indemnified its surety for any expenses paid out under these bonds. As of September 30, 2015, an aggregate of approximately $969.9 million in original face amount of bonds issued by the surety were outstanding. Our estimated remaining cost to complete these bonded projects was approximately $110.0 million as of September 30, 2015.

Indemnities

From time to time, pursuant to its service arrangements, the Company indemnifies its customers for claims related to the services it provides under those service arrangements. These indemnification obligations may subject the Company to indemnity claims and liabilities and related litigation. The Company is not aware of any material unrecorded liabilities for asserted claims in connection with these indemnification obligations.

Multi-employer Pension Plans

Many of the Company’s subsidiaries’ craft labor employees are covered by collective bargaining agreements. The agreements require the subsidiaries to pay specified wages, provide certain benefits and contribute certain amounts to multi-employer pension plans. If a subsidiary withdraws from any of the multi-employer pension plans or if the plans were to otherwise become underfunded, the subsidiary could be assessed liabilities for additional contributions related to the underfunding of these plans. Although the Company has been informed that some of the multi-employer pension plans to which its subsidiaries contribute have been classified as “critical” status, the Company is not currently aware of any significant liabilities related to this issue.

Litigation and Other Legal Matters

The Company is from time-to-time party to various lawsuits, claims, and other legal proceedings that arise in the ordinary course of business. These actions typically seek, among other things, compensation for alleged personal injury, breach of contract and/or property damages, punitive damages, civil penalties or other losses, or injunctive or declaratory relief.

The Company is routinely subject to other civil claims, litigation and arbitration, and regulatory investigations arising in the ordinary course of our business as well as in respect of our divested businesses. These claims, lawsuits and other proceedings include claims related to the Company’s current services and operations, as well as our historic operations.

With respect to all such lawsuits, claims and proceedings, the Company records reserves when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. The Company does not believe that any of these proceedings, separately or in the aggregate, would be expected to have a material adverse effect on the Company’s financial position, results of operations or cash flows.