# Underground & Site Utilities > Self-performed underground plumbing and site utilities in St. Louis — sanitary, storm and water services with our own excavation crews. Request a bid now. Canonical: https://legacyplumbingmo.com/commercial/underground-site-utilities Underground & Site Utilities Sanitary, storm, water service, fire main, and grease waste — self-performed with in-house excavation from O'Fallon out to a 2-hour radius around the St. Louis metro. [Request a Site Utility Bid](https://legacyplumbingmo.com/contact-us) [Call 636-978-0120](tel:+16369780120) ## Get an Underground Utility Quote Tell us about your project — we respond within one business day. Drain, Sewer & Underground ## From a clogged line to a full lateral replacement. Our services include drain cleaning, camera inspection, line locating, and sewer and water line repair. Hydrovac capability lets us minimize excavation and disruption to your site. [Request Service](https://legacyplumbingmo.com/request-service) ### Services - Drain cleaning - Camera inspection - Line locating - Sewer and water line repair - Hydrovac excavation In-House Scope ## Site Utility Work We Self-Perform Across St. Louis From the city tap to the building entry — one trade, one schedule, one accountable contractor. ### Sanitary Sewer Mains & Laterals PVC and ductile iron sanitary tied into city mains, with manholes, cleanouts, and air-tested joints. View Sanitary Sewer Mains & Laterals details ### Storm & Roof Drain Tie-Ins Storm structures, area drains, and roof drain leaders connected to detention and city storm systems. View Storm & Roof Drain Tie-Ins details ### Domestic Water Service Copper and HDPE water service from the meter pit into the building with hot tap and bacteriological testing. View Domestic Water Service details ### Fire Service & Hydrant Underground fire mains, post-indicator valves, and hydrants coordinated with your fire protection contractor. View Fire Service & Hydrant details ### Grease Waste & Interceptors Restaurant grease lines and exterior grease interceptors set, tied in, and tested for code compliance. View Grease Waste & Interceptors details ### Lift Stations & Pump Systems Duplex and triplex lift stations, ejector pits, and oil/water separators for sites that need help moving water. View Lift Stations & Pump Systems details Why Self-Perform Matters ## In-House Excavation Built for St. Louis Sites When site utilities and building plumbing are run by the same crew, the slab gets poured on time and the city inspector signs off the first time. No two-trade finger-pointing. - Owned excavators & mini-ex - Skid steers & trench shoring - Hot-tap & wet-tap capability - Air-test & bac-test ready - MSD & city water coordination - Restoration & paving partners Where We Work ## Site Utility Service Across the St. Louis Region St. Louis City St. Charles County Jefferson County Franklin County St. Louis County Lincoln County Warren County Metro East IL Our Process ## From Survey to Sign-Off on St. Louis Sites A predictable site-utility process built around the city inspector and your GC's schedule. - 1 ### Survey & Locate Utility locates, civil-drawing review, and coordination with the city tap. - 2 ### Excavate & Install Trench, shore, bed, and lay sanitary, storm, water, and fire mains to spec. - 3 ### Tie-In & Backfill City connections, structures set, backfill in lifts, and compaction tested. - 4 ### Test & Inspect Air, hydro, and bac testing — documented and signed off by the local AHJ. FAQ ## St. Louis Underground Site Utilities — FAQs - **Do you self-perform the excavation for site utilities?:** Yes. We own and operate our own excavators, mini-excavators, and skid steers, so underground installation runs without a separate excavation sub. - **Can you coordinate with the civil engineer and city of St. Louis inspectors?:** Yes. We submit shop drawings, schedule inspections, and coordinate with MSD, city water, and local AHJs across the St. Louis metro. - **What sites have you done site utilities on?:** Restaurants, car washes, medical and dental offices, multi-unit residential, retail centers, warehouses, and industrial pads across St. Louis and St. Charles County. - **Do you handle bonding and pressure testing?:** Yes — every underground utility is pressure-tested, documented, and turned over with the inspection record so your GC has a clean closeout package. ### Related Services - [Bid-Spec (Plan & Spec) Projects](https://legacyplumbingmo.com/commercial/bid-spec) - [Design/Build & Preconstruction](https://legacyplumbingmo.com/commercial/design-build) - [Ground-Up New Construction](https://legacyplumbingmo.com/services/new-construction) - [Industrial Plumbing](https://legacyplumbingmo.com/commercial/industrial-plumbing) - [Backflow Prevention & Testing](https://legacyplumbingmo.com/commercial/backflow-prevention) ### Next Steps - [Request Service](https://legacyplumbingmo.com/request-service) - [View All Commercial Services](https://legacyplumbingmo.com/commercial) - [Request a Free Estimate](https://legacyplumbingmo.com/contact-us) Serving the Greater St. Louis Area ## Underground & Site Utilities Across the St. Louis Metro Underground is where projects get won or lost. Our own excavators, locators, and pipe crews work site utilities across Wentzville, Lake Saint Louis, Florissant, Hazelwood, Webster Groves, and Kirkwood — tying into Missouri American Water and city sewer with the survey, sleeves, and as-builts the inspector expects. Because we self-perform excavation, we don't wait on a sub to dig the trench — your sanitary, storm, and domestic water service go in with the crew that runs the building. Don't see your city below? We work the entire metro and a 2-hour radius from O'Fallon, MO. [View full service area →](https://legacyplumbingmo.com/service-areas) ### St. Charles County - [O'Fallon](https://legacyplumbingmo.com/locations/ofallon) - [St. Charles](https://legacyplumbingmo.com/locations/st-charles) - [St. Peters](https://legacyplumbingmo.com/locations/st-peters) - [Wentzville](https://legacyplumbingmo.com/locations/wentzville) - [Lake Saint Louis](https://legacyplumbingmo.com/service-area/lake-st-louis-mo) - [Dardenne Prairie](https://legacyplumbingmo.com/service-area/dardenne-prairie-mo) - [Cottleville](https://legacyplumbingmo.com/service-area/cottleville-mo) - [Weldon Spring](https://legacyplumbingmo.com/service-area/weldon-spring-mo) - [New Melle](https://legacyplumbingmo.com/service-area/new-melle-mo) - [Foristell](https://legacyplumbingmo.com/service-area/foristell-mo) ### Lincoln County - [Troy](https://legacyplumbingmo.com/service-area/troy-mo) - [Moscow Mills](https://legacyplumbingmo.com/service-area/moscow-mills-mo) - [Elsberry](https://legacyplumbingmo.com/service-area/elsberry-mo) - [Winfield](https://legacyplumbingmo.com/service-area/winfield-mo) - [Old Monroe](https://legacyplumbingmo.com/service-area/old-monroe-mo) - [Hawk Point](https://legacyplumbingmo.com/service-area/hawk-point-mo) - [Silex](https://legacyplumbingmo.com/service-area/silex-mo) ### Warren County - [Warrenton](https://legacyplumbingmo.com/service-area/warrenton-mo) - [Wright City](https://legacyplumbingmo.com/service-area/wright-city-mo) - [Marthasville](https://legacyplumbingmo.com/service-area/marthasville-mo) - [Innsbrook](https://legacyplumbingmo.com/service-area/innsbrook-mo) - [Truesdale](https://legacyplumbingmo.com/service-area/truesdale-mo) ### St. Louis County - [Affton](https://legacyplumbingmo.com/service-area/affton-mo) - [Clayton](https://legacyplumbingmo.com/locations/clayton) - [Ladue](https://legacyplumbingmo.com/service-area/ladue-mo) - [Brentwood](https://legacyplumbingmo.com/service-area/brentwood-mo) - [Chesterfield](https://legacyplumbingmo.com/locations/chesterfield) - [Crestwood](https://legacyplumbingmo.com/service-area/crestwood-mo) - [Des Peres](https://legacyplumbingmo.com/service-area/des-peres-mo) - [Fenton](https://legacyplumbingmo.com/service-area/fenton-mo) - [Lemay](https://legacyplumbingmo.com/service-area/lemay-mo) - [Maplewood](https://legacyplumbingmo.com/service-area/maplewood-mo) ### Jefferson County - [Arnold](https://legacyplumbingmo.com/service-area/arnold-mo) - [Festus](https://legacyplumbingmo.com/service-area/festus-mo) - [Crystal City](https://legacyplumbingmo.com/service-area/crystal-city-mo) - [Herculaneum](https://legacyplumbingmo.com/service-area/herculaneum-mo) - [Pevely](https://legacyplumbingmo.com/service-area/pevely-mo) - [De Soto](https://legacyplumbingmo.com/service-area/de-soto-mo) - [Hillsboro](https://legacyplumbingmo.com/service-area/hillsboro-mo) - [Barnhart](https://legacyplumbingmo.com/service-area/barnhart-mo) - [Imperial](https://legacyplumbingmo.com/service-area/imperial-mo) - [High Ridge](https://legacyplumbingmo.com/service-area/high-ridge-mo) ### St. Louis City - [Central West End](https://legacyplumbingmo.com/service-area/central-west-end-mo) - [Compton Heights](https://legacyplumbingmo.com/service-area/compton-heights-mo) - [Lafayette Square](https://legacyplumbingmo.com/service-area/lafayette-square-mo) - [Soulard](https://legacyplumbingmo.com/service-area/soulard-mo) - [Tower Grove South](https://legacyplumbingmo.com/service-area/tower-grove-south-mo) - [Shaw](https://legacyplumbingmo.com/service-area/shaw-mo) - [Benton Park](https://legacyplumbingmo.com/service-area/benton-park-mo) - [The Hill](https://legacyplumbingmo.com/service-area/the-hill-mo) - [Dogtown](https://legacyplumbingmo.com/service-area/dogtown-mo) - [South City](https://legacyplumbingmo.com/service-area/south-city-st-louis-mo) For examples of this work, see [Ground-Up Site Utilities (O'Fallon, MO)](https://legacyplumbingmo.com/projects/ground-up-site-utilities-ofallon-mo) and [Cold Storage Facility in Foristell (Foristell, MO)](https://legacyplumbingmo.com/projects/cold-storage-facility-foristell-mo) . For planning guidance, read [Underground Plumbing Before the Slab: A Commercial Coordination and Inspection Checklist](https://legacyplumbingmo.com/resources/underground-plumbing-before-the-slab-checklist) . ## Pricing Site Utilities for a St. Louis Project? Get a self-performing underground bid from an O'Fallon-based contractor working across the St. Louis metro. [Get Free Estimate](https://legacyplumbingmo.com/contact-us) [636-978-0120](tel:+16369780120) ## From Our Job Sites Underground plumbing stubbed up on a commercial building pad Underground PVC drain rough-in before the slab pour Plumbing stubs set inside a new foundation Underground sanitary line in an open trench ## Related - [Contact Legacy Plumbing](https://legacyplumbingmo.com/contact-us) - [Company facts](https://legacyplumbingmo.com/company-facts) - [All pages (llms.txt)](https://legacyplumbingmo.com/llms.txt)