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Contract W912P521C0009

C. J. Mahan Construction Company, Llc · Department Of Defense · September 9, 2021

Firm Fixed PriceFull & Open CompetitionNAICS 237990

C. J. Mahan Construction Company, Llc was awarded a federal contract by Department Of Defense (Department Of The Army) on September 9, 2021 for $78.17 million of work in other heavy and civil engineering construction. Performance is in Chattanooga, TN. It was awarded under full and open competition. The contract has been modified 20 times since the base award It uses firm fixed-price contract pricing. The most recent modification was on November 25, 2025.

Obligated to date
$78.17M
$78,174,994
Current value
$78.17M
Modifications
20
Latest November 25, 2025

Contract details

PIID
W912P521C0009
Award type
Definitive Contract
Pricing
Firm Fixed Price
Set-aside
No Set Aside Used.
Competition
Full And Open Competition
NAICS
237990 · Other Heavy And Civil Engineering Construction
Product / service
Repair Or Alteration Of Dams
Place of performance
Chattanooga, TN
First action
September 9, 2021
Latest action
November 25, 2025

Description

CL026 ADVERSE WEATHER #2 PURSUANT TO AUTHORITY OF FAR 52.249-10 DEFAULT (FIXED-PRICE CONSTRUCTION). CONTRACT PRICE IS UNCHANGED BY THIS MODIFICATION. CHANGE INCLUDES 60 CD TIME EXTENSION. RCD CHANGED

Modification timeline

  • November 25, 2025
    Mod A00012
    CL026 ADVERSE WEATHER #2 PURSUANT TO AUTHORITY OF FAR 52.249-10 DEFAULT (FIXED-PRICE CONSTRUCTION). CONTRACT PRICE IS UNCHANGED BY THIS MODIFICATION. CHANGE INC
    $0
  • September 26, 2025
    Mod P00008
    P00008 CL021-1 RFI-100 BRIDGING INTAKE LINES AT WATTS BAR (UCO) PART 1 MODIFICATION.
    $600.0K
  • September 5, 2025
    Mod A00011
    IMPLEMENT CHANGE CL024 PURSUANT TO FAR 52.236-2 DIFFERING SITE CONDITIONS. CONTRACT PRICE IS INCREASED BY $75,000.00 FROM $77,499,994.46 TO $77,574,994.46. THE
    $75.0K
  • August 4, 2025
    Mod A00010
    IMPLEMENT CHANGE CL020 AND CL022 PURSUANT TO FAR 52.243-CHANGES. CONTRACT PRICE IS INCREASED BY $74,634.14 FROM $77,425,360.32 TO $77,499,994.46. THE CONTRACT
    $74.6K
  • May 7, 2025
    Mod A00009
    IMPLEMENT CHANGE CL019 PURSUANT TO FAR 52.243-CHANGES. CONTRACT PRICE IS INCREASED BY $1,800.00 FROM $77,423,560.32 TO $77,425,360.32. THE CONTRACT COMPLETION
    $1.8K
  • April 23, 2025
    Mod P00007
    P00007 CL017 REDESIGN TIME IMPACT REA FOR THE PARTIAL SUSPENSION OF TECHNIQUE SHAFT WORK REDESIGN OF THE DRILLED SHAFTS, INTERMEDIATE PIERS, NOSE PIERS, AND OF
    $9.47M
  • February 3, 2025
    Mod A00008
    IMPLEMENT CHANGES CL011 AND CL015 PURSUANT TO FAR 52.243-CHANGES AND CL012 PURSUANT TO FAR 52.236-2 DIFFERING SITE CONDITIONS. CONTRACT PRICE INCREASED BY $238,
    $238.1K
  • December 3, 2024
    Mod A00007
    CCD IS EXTENDED BY 60 CALENDAR DAYS FROM 12 DECEMBER 2024 TO 10 FEBRUARY 2025. CONTRACT PRICE REMAINS UNCHANGED AT $67,712,961.35.
    $0
  • October 28, 2024
    Mod P00006
    THIS MODIFICATION IS TO DEFINITIZE UCO PART 1 EXECUTED IN W912P521C0009-P00004. IMPLEMENT CL009-2(VECP DRILLED SHAFTS) PURSUANT TO FAR 52.248-3 VALUE ENGINEERIN
    $2.56M
  • June 27, 2024
    Mod A00006
    CL013 AND CL014 ARE ENTERED INTO PURSUANT TO AUTHORITY OF FAR 52.243-4 CHANGES. TOTAL CONTRACT PRICE IS INCREASED BY $1,597.50 TO $65,152,717.11. CONTRACT COMPL
    $1.6K
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Frequently asked questions

What is contract W912P521C0009?

Contract W912P521C0009 is a federal contract awarded to C. J. Mahan Construction Company, Llc by Department Of Defense on September 9, 2021 for $78.17 million of work classified under OTHER HEAVY AND CIVIL ENGINEERING CONSTRUCTION. It has been modified 20 times since the base award.

Who won contract W912P521C0009?

C. J. Mahan Construction Company, Llc won contract W912P521C0009 from Department Of Defense.

How much is contract W912P521C0009 worth?

Contract W912P521C0009 has obligated $78.17 million to date.