| | OK - COMANCHE DAM MODIFICATIONS (ROLLER COMPACTED CONCRETE) | SEMA CONSTRUCTION INC | $3,622,569 | US FISH AND WILDLIFE SERVICE | US FISH AND WILDLIFE SERVICE | — | 237990Other Heavy and Civil Engineering Construction | Z2KAREPAIR OR ALTERATION OF DAMS | Apr 2, 2021 | Apr 19, 2021 | Nov 29, 2021 |
| | RED WILLOW DAM MODIFICATION | SEMA CONSTRUCTION INC | $16,908,079 | BUREAU OF RECLAMATION | BUREAU OF RECLAMATION | — | 237990Other Heavy and Civil Engineering Construction | Z211 | Sep 26, 2011 | Sep 26, 2011 | Sep 30, 2014 |
| | GRADING, DRAINAGE, RETAINING WALLS, AND ASPHALT SURFACING ON 10.274 KM OF ROADWAY | SEMA CONSTRUCTION INC | $35,966,389 | FEDERAL HIGHWAY ADMINISTRATION | FEDERAL HIGHWAY ADMINISTRATION | — | 237310Highway, Street, and Bridge Construction | Y222 | Jun 13, 2008 | Jun 13, 2008 | Apr 3, 2013 |
| | — | SEMA CONSTRUCTION INC | $0 | DEPT OF THE ARMY | — | — | — | Y219 | Sep 2, 1997 | Sep 2, 1997 | — |
| | — | SEMA CONSTRUCTION INC | $0 | PUBLIC BUILDINGS SERVICE | — | — | — | Z111 | Jan 15, 1995 | Jan 15, 1995 | Jan 15, 1995 |
| | — | SEMA CONSTRUCTION INC | $0 | PUBLIC BUILDINGS SERVICE | — | — | — | Z111 | Sep 15, 1994 | Sep 15, 1994 | Nov 15, 1994 |
| | — | SEMA CONSTRUCTION INC | $0 | PUBLIC BUILDINGS SERVICE | — | — | — | Z111 | Jun 15, 1994 | Jun 15, 1994 | Jun 15, 1994 |
| | — | SEMA CONSTRUCTION INC | $0 | PUBLIC BUILDINGS SERVICE | — | — | — | Z111 | Dec 15, 1993 | Dec 15, 1993 | Dec 15, 1993 |
| | — | SEMA CONSTRUCTION INC | $0 | PUBLIC BUILDINGS SERVICE | — | — | — | Z111 | Nov 15, 1993 | Nov 15, 1993 | Nov 15, 1993 |
| | — | SEMA CONSTRUCTION INC | $0 | PUBLIC BUILDINGS SERVICE | — | — | — | Z111 | Oct 15, 1993 | Oct 15, 1993 | Dec 15, 1993 |
| | — | SEMA CONSTRUCTION INC | $0 | PUBLIC BUILDINGS SERVICE | — | — | — | Z111 | Sep 15, 1993 | Sep 15, 1993 | Dec 15, 1993 |
| | — | SEMA CONSTRUCTION INC | $0 | PUBLIC BUILDINGS SERVICE | — | — | — | Z111 | Aug 15, 1993 | Aug 15, 1993 | Oct 15, 1993 |
| | — | SEMA CONSTRUCTION INC | $0 | PUBLIC BUILDINGS SERVICE | — | — | — | Z111 | May 15, 1993 | May 15, 1993 | Oct 15, 1993 |
| | — | SEMA CONSTRUCTION INC | $0 | PUBLIC BUILDINGS SERVICE | — | — | — | Z111 | Apr 15, 1993 | Apr 15, 1993 | Sep 15, 1993 |
| | — | SEMA CONSTRUCTION INC | $0 | PUBLIC BUILDINGS SERVICE | — | — | — | Z111 | Jan 15, 1993 | Jan 15, 1993 | Sep 15, 1993 |
| | — | SEMA CONSTRUCTION INC | $0 | PUBLIC BUILDINGS SERVICE | — | — | — | Z111 | Oct 15, 1992 | Oct 15, 1992 | Jun 15, 1993 |
| | — | SEMA CONSTRUCTION INC | $0 | PUBLIC BUILDINGS SERVICE | — | — | — | Z111 | Sep 15, 1992 | Sep 15, 1992 | — |
| | — | SEMA CONSTRUCTION INC | $0 | PUBLIC BUILDINGS SERVICE | — | — | — | Z111 | Aug 15, 1992 | Aug 15, 1992 | — |
| | — | SEMA CONSTRUCTION INC | $0 | PUBLIC BUILDINGS SERVICE | — | — | — | Z111 | Jul 15, 1992 | Jul 15, 1992 | — |
| | — | SEMA CONSTRUCTION INC | $0 | PUBLIC BUILDINGS SERVICE | — | — | — | Z111 | May 15, 1992 | May 15, 1992 | Nov 15, 1994 |