Capabilities · Civil & site work
Civil and site work for federal facilities.
Excavation, concrete, paving, retaining walls and site utilities, self-performed by our own crews.
What we do
SIS has completed civil work for the U.S. Army Corps of Engineers, the Metropolitan St. Louis Sewer District, USDA and GSA. Projects range from parking lot reconstruction at the Melvin Price Federal Building in East St. Louis to retaining walls and steel stairs on a remote Fort Leonard Wood training area.
We also self-perform carpentry: stick-frame buildings, drywall and foundations.
Services
- Excavation and grading
- Concrete foundations, slabs and flatwork
- Parking lots and paving
- Retaining walls
- Site utilities and directional boring
- Grade beams and step footings
- Carpentry and framing
- Demolition and removal
Past performance
Related projects
Melvin Price Federal Building parking lot
Low-carbon parking lot repairs at a historic federal courthouse.
Case study →
Fort Leonard Wood erosion control
Trail, retaining walls and steel steps on remote terrain, zero incidents.
Case study →
USDA laboratory rooftop HVAC
Lab rooftop HVAC on a new steel platform, on time and on budget.
Case study →Federal sites
Site work on active federal property
Civil work on a federal site rarely happens on an empty lot. Parking lots serve working courthouses, utilities cross live roads, and footings go in next to buildings full of people and buried infrastructure. Good site work starts with locating what is already there and phasing so the facility keeps operating.
SIS's civil crews have rebuilt a training-area trail on steep terrain at Fort Leonard Wood, excavated for footings around buried vaults at USDA in Peoria, and improved the parking lot at the Melvin Price Federal Building and U.S. Courthouse in East St. Louis for GSA.
Scope
Civil and site scope we self-perform
Self-performing the core civil scope keeps schedule control with SIS and supports primes' limitations-on-subcontracting requirements on set-aside awards.
- Excavation, grading and backfill
- Concrete foundations, grade beams and slabs
- Parking lots, paving and flatwork
- Retaining walls and steps
- Underground utilities and directional boring
- Erosion and sediment control
- Demolition and removal
- Carpentry, framing and drywall
How we deliver it
How we approach a site project
- Step 1
Locate and protect
Utility locates, existing-conditions surveys and protection plans before any excavation.
- Step 2
Phase around operations
Parking, entrances and access routes are kept open in phases, with traffic control where needed.
- Step 3
Build to specification
Compaction, concrete and paving are tested and documented against the project specifications.
- Step 4
Restore and close out
Disturbed areas are restored, and as-builts record what was installed and where.
Service areas
Where we do civil work
Frequently asked questions
Does SIS do paving and parking lot work for federal buildings?
Yes. GSA awarded SIS parking lot improvements at the Melvin Price Federal Building and U.S. Courthouse in East St. Louis in 2024.
Can SIS work in remote or rugged locations?
Yes. At Fort Leonard Wood, SIS built retaining walls and steel steps on steep, remote terrain with no cell service and finished with zero incidents.
Have a project or solicitation in this scope?
Send us the details and our BD team will respond within one business day.