Contract W912P521C0009
C. J. Mahan Construction Company, Llc · Department Of Defense · September 9, 2021
C. J. Mahan Construction Company, Llc was awarded a federal contract by Department Of Defense (Department Of The Army) on September 9, 2021 for $61.61 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 5 times since the base award It uses firm fixed-price contract pricing. The most recent modification was on 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 FROM 01 DECEMBER 2025 TO 30 JANUARY 2026.
Modification timeline
-
November 25, 2025Mod A00012 · Supplemental Agreement For Work Within Scope$78.17M
-
September 26, 2025Mod P00008 · Change OrderP00008 CL021-1 RFI-100 BRIDGING INTAKE LINES AT WATTS BAR (UCO) PART 1 MODIFICATION.$78.17M
-
September 5, 2025Mod A00011 · Change OrderIMPLEMENT 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 CONTRACT COMPLETION DATE REMAINS UNCHAN…$78.17M
-
August 4, 2025Mod A00010 · Supplemental Agreement For Work Within ScopeIMPLEMENT 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 COMPLETION DATE REMAINS UNCHANGED AT DEC…$78.17M
-
June 27, 2024Mod A00006 · Supplemental Agreement For Work Within ScopeCL013 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 COMPLETION DATE REMAINS UNCHANGED AT DECEMBER…$65.15M
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September 9, 2021Base awardUPSTREAM APPROACH WALLS, CHICKAMAUGA LOCK, CHATTANOOGA TN.$60.86M
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|---|---|---|---|
| 1 | Thalle - Bauer Llc | 1 | $320.39M |
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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 $61.61 million of work classified under OTHER HEAVY AND CIVIL ENGINEERING CONSTRUCTION. It has been modified 5 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 $61.61 million to date, with a total potential value of $78.17 million if all options are exercised.