THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

InfraSource Services, Inc. (IFS)

4/7/2006 Proxy Information

Mr. Harmon is currently a Managing Director of Oaktree Capital Management, LLC. Oaktree Capital Management, LLC controsl 32% of the company stock.

Mr. Schapiro is a founding principal of GFI Energy Ventures. During 2005, InfraSource was a controlled company under the NYSE Standards because OCM/GFI Power Opportunities Fund, L.P. and OCM Principal Opportunities Fund II, L.P., the funds managed by Oaktree Capital Management, LLC and GFI Energy Ventures LLC (which funds are referred to in this proxy statement as our “principal stockholders”), held more than 60% of our outstanding voting common stock.

ITS Acquisition

On January 27, 2004, InfraSource acquired all of the voting interests of Maslonka & Associates, Inc., now known as InfraSource Transmission Services Company (“ITS”), for a total purchase price of $83.2 million, which included the issuance of 4,330,820 shares of InfraSource’s common stock, transaction costs and purchase price contingencies. The value of the shares issued to Maslonka stockholders was determined to be approximately $50.7 million. Martin Maslonka, a principal stockholder of InfraSource, received $9.5 million in cash and 2,407,235 shares of InfraSource common stock. The final purchase price was subject to a working capital adjustment and settlement of holdback adjustments to the purchase price in accordance with the terms of the acquisition agreement. Under the terms of the holdback provisions, InfraSource withheld $6.6 million in cash payable at closing and 957,549 shares of common stock, including $5.9 million in cash and 532,206 shares relating to Mr. Maslonka. We finalized the working capital adjustment in July 2005 and released $3.3 million in cash and 478,775 shares of common stock to the sellers in accordance with the agreement, including $3.1 million in cash and 41,889 shares of common stock to Mr. Maslonka. The balance of the holdback was released in January 2006.

ITS Lease

We lease our ITS headquarters in Mesa, Arizona and our ITS Texas field office in San Angelo, Texas from EC Source, LLC, which is wholly owned by Martin Maslonka. Our leases for these two properties will run through February 2009, subject to a five-year renewal option. Pursuant to these leases, we will incur total annual lease payments of $0.2 million.

ITS Promissory Note

ITS was the issuer of a $1.0 million installment promissory note in favor of Martin Maslonka. The promissory note had an annual interest rate of 8.5%, and interest is payable in equal monthly payments of $7,083. The promissory note which was scheduled to mature on June 30, 2006 was repaid in December 2005.

Blair Park Liabilities

As of December 31, 2005, we had $7.1 million due to the former owners of Blair Park Services, Inc. and Sunesys, Inc. (collectively “Blair Park”) accrued in other liabilities—related parties on our consolidated balance sheet for additional contingent purchase price consideration. This amount will be paid in April 2006. We acquired Blair Park in 2001.

Registration Rights Agreement

In January 2004, we entered into a registration rights agreement with our principal stockholders, certain of our executive officers and the sellers in the ITS acquisition transaction. Subject to certain conditions, the registration rights agreement requires us to register the shares of InfraSource owned by such stockholders with the SEC so that those shares may be publicly resold or to include their shares in certain registration statements we file. Our principal stockholders are entitled to require us to file a registration statement with the SEC for the resale of their shares. The sellers in the ITS acquisition and our executive officers are not entitled to require us to file a registration statement but may include their shares in certain registration statements filed by us. The underwriters of any underwritten offering will have the right to limit the number of shares to be included in the filed registration statement. In addition, we will pay all expenses (other than underwriting discounts and commissions) on behalf of any selling stockholder participating in a registered offering pursuant to the registration rights agreement.

In December 2005, we amended the Registration Rights Agreement to add Tontine Capital Partners, L.P. as a stockholder entitled to benefits under the agreement in connection with the sale of shares of our common stock by our principal stockholders and Martin Maslonka to Tontine Capital Partners, L.P.

Coleman Properties Lease

We lease office and warehouse space from Coleman Properties of which Lawrence Coleman, President of Blair Park Services, Inc. and Sunesys, Inc., and his relatives are general partners. The lease for this space was to run through October 2005, subject to a 6 year renewal option. The terms of the lease provided for an increase in rental payments equal to the increase in the Consumer Price Index. In October, 2005 we renewed the lease for three years and our annual payments under this agreement are approximately $86,000. We also lease ducts in two river bores under the Delaware River from Coleman Properties. Our lease commenced on May 1, 2005 and has a term of five years, with an option to extend. Our annual lease payment is $0.02 million for each pair of fiber installed in the conduit up to a maximum of $0.2 million per year if additional ducts are leased.

Stockholders’ Agreement

In September 2003, we and certain holders of our common stock became parties to a stockholders’ agreement. Upon closing of the January 2004 ITS transaction, the Maslonka sellers were added as parties. This stockholders’ agreement gave our principal stockholders a right of first refusal if any existing stockholder proposed to transfer its common stock. Upon the closing of our initial public offering, most of the provisions of the stockholders’ agreement, including those providing for the right of first refusal, automatically terminated.