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DefDex

Federal award

SOUTHERN OHIO CLEANUP COMPANY LLC

89303125FEM400428

Contract

Obligated and Ceiling

Obligated (net)
$399,660,463.32
Ceiling (potential value, not spending)
$2,552,717,665.65
Current value
$2,552,717,665.65
Gross positive obligations
$416,260,463.32

Obligated is what the government has committed, net of de-obligations. The ceiling is the most the award or vehicle could ever reach; it is shown separately and never added to, or compared as, spending.

Award Details

Recipient
SOUTHERN OHIO CLEANUP COMPANY LLC · NYYVB7U3D766
Owner company
Southern Ohio Cleanup CompanyBasis joint venture: counted under the venture itself, never under a partner.
Reported parent
AMENTUM HOLDINGS INC. · TU4KCXMM9AP6
Awarding agency
Department of Energy · sub-agency 8900 · office 893031
Funding agency
Department of Energy · sub-agency 8900
Product or service (PSC)
F999 · OTHER ENVIRONMENTAL SERVICES
Industry (NAICS)
562910 · REMEDIATION SERVICES
PIID
89303125FEM400428
Parent vehicle (IDV PIID)
89303323DEM000089
Award type code
C
Actions
23 · Sep 19, 2025 to Sep 30, 2026
Why it is listed
gross positive obligations of $100k or more (contracts); reviewed company, $10k or more

Open this award on USAspending →

Action History23

Award actions
DateFYModAction typeObligationCompany in company totals
Sep 30, 2026FY2026P00022C$0.00
Sep 25, 2026FY2026P00021C$30,855,465.76
Aug 31, 2026FY2026P00020D$0.00
Aug 27, 2026FY2026P00019M$0.00
Aug 24, 2026FY2026P00018C$24,567,000.00
Aug 10, 2026FY2026P00017D$0.00
Jul 31, 2026FY2026P00016C$79,192,930.96
Jul 29, 2026FY2026P00015B$0.00
Jun 30, 2026FY2026P00014C$21,925,000.00
May 28, 2026FY2026P00013C$17,150,000.00
May 21, 2026FY2026P00012C$14,584,000.00
May 18, 2026FY2026P00011C−$16,600,000.00
Apr 23, 2026FY2026P00010C$59,947,000.00
Mar 31, 2026FY2026P00009C$17,959,000.00
Feb 27, 2026FY2026P00008C$7,111,000.00
Jan 27, 2026FY2026P00007C$41,942,000.00
Dec 22, 2025FY2026P00006C$36,487,000.00
Dec 18, 2025FY2026P00005M$0.00
Dec 17, 2025FY2026P00004B$0.00
Nov 25, 2025FY2026P00003C$23,265,000.00
Nov 7, 2025FY2026P00002C$18,350,000.00
Sep 26, 2025FY2025P00001C$22,925,066.60
Sep 19, 2025FY20250—$0.00

Newest first. Every obligation is shown as reported, including zero and negative (de-obligation) actions. Award lists belong to the company of the latest action; company totals credit each action to the company named on that row, so a note marks rows where the two differ.