QUANTA SERVICES INC, QUANTA SERVICES MANAGEMENT ...

Exhibit
No. Description
10.23 — Second Amended and Restated Security Agreement dated as of August 2, 2011, among Quanta
Services, Inc., the other Debtors identified therein, and Bank of America, N.A., as Administrative
Agent for the ratable benefit of the Secured Parties (previously filed as Exhibit 99.2 to the
Company’s Form 8-K (No. 001-13831) filed August 8, 2011 and incorporated herein by
reference)
10.24 — Second Amended and Restated Pledge Agreement dated as of August 2, 2011, among Quanta
Services, Inc., the other Pledgors identified therein, and Bank of America, N.A., as
10.25
Administrative Agent for the ratable benefit of the Secured Parties (previously filed as
Exhibit 99.3 to the Company’s Form 8-K (No. 001-13831) filed August 8, 2011 and incorporated
herein by reference)
— Assignment and Assumption Agreement dated as of August 30, 2007, by and between
InfraSource Services, Inc. and Quanta Services, Inc. (previously filed as Exhibit 10.3 to Quanta’s
Form 8-K (001-13831) filed September 6, 2007 and incorporated herein by reference)
10.26 — Underwriting, Continuing Indemnity and Security Agreement dated as of March 14, 2005 by
Quanta Services, Inc. and the subsidiaries and affiliates of Quanta Services, Inc. identified
therein, in favor of Federal Insurance Company (previously filed as Exhibit 10.1 to the
Company’s Form 8-K (No. 001-13831) filed March 16, 2005 and incorporated herein by
reference)
10.27 — Intercreditor Agreement dated March 14, 2005 by and between Federal Insurance Company and
Bank of America, N.A., as Lender Agent on behalf of the other Lender Parties (under the
Company’s Credit Agreement, as amended) and agreed to by Quanta Services, Inc. and the
subsidiaries and affiliates of Quanta Services, Inc. identified therein (previously filed as
Exhibit 10.2 to the Company’s Form 8-K (No. 001-13831) filed March 16, 2005 and
incorporated herein by reference)
10.28 — Joinder Agreement and Amendment to Underwriting, Continuing Indemnity and Security
Agreement dated as of November 28, 2006, among American Home Assurance Company,
National Union Fire Insurance Company of Pittsburgh, Pa., The Insurance Company of the State
of Pennsylvania, Federal Insurance Company, Quanta Services, Inc., and the other Indemnitors
identified therein (previously filed as Exhibit 99.1 to the Company’s Form 8-K (No. 001-13831)
filed December 4, 2006 and incorporated herein by reference)
10.29 — Second Amendment to Underwriting, Continuing Indemnity and Security Agreement dated as of
January 9, 2008, among American Home Assurance Company, National Union Fire Insurance
Company of Pittsburgh, Pa., The Insurance Company of the State of Pennsylvania, Federal
Insurance Company, Quanta Services, Inc., and the other Indemnitors identified therein
(previously filed as Exhibit 10.34 to the Company’s Form 10-K for the year ended December 31,
2007 (No. 001-13831) filed February 29, 2008 and incorporated herein by reference)
10.30ˆ — Joinder Agreement and Third Amendment to Underwriting, Continuing Indemnity and Security
Agreement dated as of December 19, 2008,, among American Home Assurance Company,
National Union Fire Insurance Company of Pittsburg, Pa., The Insurance Company of the State
of Pennsylvania, Federal Insurance Company, Quanta Services, Inc., and the other Indemnitors
identified therein
10.31 — Joinder Agreement and Fourth Amendment to Underwriting, Continuing Indemnity and Security
Agreement dated as of March 31, 2009, among American Home Assurance Company, National
Union Fire Insurance Company of Pittsburg, Pa., The Insurance Company of the State of
Pennsylvania, Liberty Mutual Insurance Company, Liberty Mutual Fire Insurance Company,
Safeco Insurance Company of America, Federal Insurance Company, Quanta Services, Inc., and
the other Indemnitors identified therein (previously filed as Exhibit 99.1 to the Company’s
Form 8-K (No. 001-13831) filed April 1, 2009 and incorporated herein by reference)
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