WYDOT's $12.79 million Poplar Street reconstruction in Casper, between Collins Street and the North Platte River bridge, covers a new road surface plus storm and sanitary sewer and utility upgrades, with a contracted completion date of November 30, 2025. That mix, pavement on top and pipe underneath, is how most real site work goes. Owners see the building. We spend the first months on what is under it: trenches, bedding, structures, taps, conduit and the grade that moves water away from everything.
Site development is the part of a project that carries the most unknowns. Soils, rock, groundwater and old utilities are all hidden until the excavator is in the ground, and Natrona County gives us a range of them. Casper sits on the North Platte River at 5,150 feet, Casper Mountain rises to 8,130 feet roughly 3,000 feet above the city with an anticline and a fault line on its north side, and Evansville has a Superfund site with groundwater contamination. We read the ground before we price the work.
We handle clearing, rough and fine grading, water and sewer service, fire lines, storm structures, conduit for power and communications, paving subbase and final restoration. The mass grading and stormwater drainage trade partners often work as one team on a pad, and our parking lot construction follows once the underground is signed off.
The City of Casper lists a 3 foot frost line to top of footing and severe weathering, which sets minimum cover over water lines and the depth of frost-protected footings. Sewer and water lines are laid deep enough to avoid freezing, with insulation or added cover where depth is limited. Storm systems have to work in freeze-thaw conditions, so we avoid low points that hold ice and slow drains that freeze in winter.
Near the river, groundwater can control the schedule. A trench that is dry in October may be wet in May. We watch seasonal levels, plan dewatering and, where contamination is possible, test before we dig. The Mystery Bridge and Highway 20 Superfund site in Evansville involves groundwater contamination believed to come from former industrial operations, so for parcels in that area we recommend an environmental review before purchase and a soil and water plan before excavation.
The usual package is stripping and stockpiling topsoil, cut-and-fill to subgrade, compaction testing, utility trenching, bedding and backfill, manholes and inlets, fire hydrants, services to the building and conduit for power, gas and communications. Dry utilities are coordinated with the provider's design and schedule, because the provider sets the date the trench can close.
We prepare the building pad and paving subgrade with the geotechnical engineer's recommendations, including over-excavation where the soils require it. Quality control is by testing, not by eye, and we keep the reports for the permit file. Detention basins and swales are shaped, stabilized and seeded in the right season so they function. A self-storage facility or other repetitive site gets a grading plan that drains every row.
Trench collapse and utility strikes are the two ways site work hurts people. We shore or slope every trench, assign a competent person, call for locates before we dig and pothole where lines are expected. On sites with industrial history, we review old drawings and walk the ground with the owner's staff.
Traffic matters as well. Work on streets such as the Poplar Street corridor, where WYDOT's contract includes detours via Ash Street, means traffic control plans, flaggers and coordination with the agency. We schedule trench work to keep driveways open and restore pavement before winter shuts down paving. For public sector owners we also keep the inspection records and payroll documentation the agency asks for.
The parcels that need the most dirt work are the ones at the edge: foothills sites toward Casper Mountain, where grades are steeper and rock can be shallower, and river-adjacent land where groundwater and floodplain questions arise. In town, infill lots near Wyoming Boulevard and Fort Caspar bring existing utilities, a historic setting and tight access. We ask early whether anything on or near the site needs to be protected.
East along Highway 20-26, Evansville has the refinery area and industrial parcels. North toward Bar Nunn and Mills, parcels fall under separate town jurisdictions with their own utility rules. In the mountain foothills, Casper Mountain sites need wind-aware, snow-aware design for access roads and drainage. Each of these places has a different mix of risks, and the estimate should show them.
The City of Casper says commercial permits often require engineered building and site plan drawings and Planning/Zoning approval, and plan review covers structural calculations and engineering reports. Grading and drainage plans, utility plans and a storm water approach are part of that package. An issued permit is good for 180 days, so we sequence submittals to keep it alive.
The Town of Mills lists Building and Inspections, Planning and Zoning, and Public Works departments, with a water treatment facility, and each town in the metro has its own utility rules. Wyoming has no single statewide building code, so connections, inspection steps and cover requirements vary by jurisdiction. We confirm them before we price and write them into the schedule.
Share the site plan, the survey and any soils or environmental reports you have. We will return a sitework scope, a utility list and a schedule that gets the underground in before the weather turns.
As early as the permit and the weather allow. Utility trenches and pads are the first things out of the ground, and they set the date for the building. In Casper the ideal window is spring through fall, and a lot that is graded and stabilized before winter saves weeks in the spring.
Yes. It tells us the bearing capacity, the depth to rock or groundwater and whether the soils are suitable for fill. It also guides pavement design. We recommend ordering it before the site plan is finished so the plan reflects the ground.
It depends on distance and depth. A parcel that is next to existing mains costs much less than one that needs a long extension. We separate the utility lines in the estimate and tell you which ones are the provider's responsibility.
Some work can proceed, but frozen ground slows excavation, compaction and paving. We prefer to finish the underground before the freeze, and we plan winter activities such as dry utilities or building pad prep around the weather.
We recommend environmental review before purchase for sites with industrial history. If we find unexpected soils during excavation, we stop, document and coordinate with the owner and regulators. The contract states who bears the cost.