Industrial Construction in the Rocky Mountain Arsenal Area

A parcel next to a former Superfund site needs a different first conversation than a lot in a clean business park. We build industrial facilities, truck courts and yards in the Rocky Mountain Arsenal area of Adams County, and the work starts with the paper trail: what the site was before, what the adjacent land is, and which records the lender, the insurer and the city will want before they release a permit.

The history behind that question is public. The Rocky Mountain Arsenal was built in 1942 on 17,000 acres in Commerce City, was listed on the EPA Superfund National Priorities List in 1987, and was cleaned up for $2.1 billion, with surface work finishing in 2010 and groundwater treatment continuing. The Army will permanently manage about 1,000 acres of the former arsenal that contain landfills, waste consolidation areas and groundwater treatment facilities, so boundary lines on a survey matter more here than almost anywhere else in the metro.

Plant managers and corporate real estate leads weighing a site in this area should expect us to ask for the environmental reports before we price anything, and to build the schedule around what those reports say instead of around a hoped-for start date.

Reading the Neighbors Before You Buy

Most of the diligence on an arsenal-adjacent parcel is about boundaries and records, not the building. We ask for the Phase I report, any Phase II work, recorded environmental covenants and the survey that shows how your lot meets the land that stays under federal management. The Rocky Mountain Arsenal National Wildlife Refuge covers 15,988 acres, was formally opened April 2, 2004, and has its only entrance in Commerce City, so the refuge edge is a real land-use neighbor with its own sensitivity to lighting, dust and runoff.

Heavy industry is part of the picture too. The nearby Suncor refinery in Commerce City, formed from two former refineries on either side of Brighton Boulevard, has a capacity of 98,000 barrels per day, and a neighbor like that shapes truck routing, emergency access and what an insurer will accept. We map those constraints with you in the first weeks and carry them into the site plan, so nothing surfaces for the first time at plan review.

Earthwork Plans That Expect Surprises

Even where a report comes back clean, we write the earthwork plan as though the soil could surprise us. That means a defined stop-work and sampling procedure, a stockpile area that can be lined and covered, and a haul-off plan that names the receiving facility before the first scraper moves. When the grading scope grows, the site clearing and mass grading partners we coordinate already know where soil goes and who signs for it.

Dust control gets the same attention. Open ground east of the city lets dust travel, and an uncovered stockpile near a refuge or a refinery fence line draws complaints quickly. Water trucks, stabilized haul roads and temporary seeding go into the schedule as line items. Silt control is placed before earthwork begins, and detention is sized to the final paving rather than to the first rough grade, as we describe under stormwater detention and drainage.

Which Code Applies and How Review Moves

Commercial building codes in Colorado are adopted city by city and county by county rather than as one statewide code. The Home Builders Association of Metro Denver tracker dated January 20, 2026 shows Adams County on the 2018 I-codes, while a neighboring city can sit on a different edition, so the code that governs your building depends on which jurisdiction holds the parcel. We confirm the edition with the building department at the start of preconstruction and design to it, and our permitting and entitlements coordination keeps site, building, fire and utility reviews running in parallel.

Fire and electrical reviews take more calendar time than owners expect. Large heat loads, hazardous material storage and sprinkler demand each add a review cycle. We assemble the fire flow, hydrant and apparatus access package early and hold it against the site plan, so a late change to a truck court does not reopen the whole submittal.

Sequencing a Rail-Served or Truck-Heavy Yard

Many users in this part of Adams County want either a rail connection or a deep truck court, and both are earthwork-first jobs. We sequence the site so underground utilities, the detention basin and the subgrade are finished and proven before foundations start, because a heavy rain on a half-built pad costs more weeks than most other delays. Where a rail spur is part of the plan, its design and the railroad's review run beside the building design, as covered under rail spur site improvements.

Winter matters as well. We aim to finish paving and slab placements before sustained cold, and we plan heated enclosures and blankets for the pours that cannot wait. Owners with a fixed equipment commissioning date tell us the date up front, and we work backward from it so the building is dry and the floor is cured when the machinery arrives.

What Usually Follows the Site Package

Once the site is stable, owners typically add the yard and the building. Truck movement is handled in our truck courts and trailer yards work, and users that handle bulk materials or fabricated metal often fit the way we serve metals and heavy industry, where floor loading, crane service and containment are the main design questions.

Buyers evaluating this area usually compare it against sites in Commerce City and Thornton, and we are glad to price the same program in more than one submarket so the comparison rests on real numbers rather than on rent guesses.

Start With the Records

If you hold or are considering a parcel near the former arsenal, send us the survey and any environmental reports. We will tell you what the site can carry and what it will cost to prepare.

Common Questions

Can we build on land next to the former arsenal?

In many cases yes, and the answer turns on the specific parcel rather than the neighborhood. The parcel's own environmental history, any recorded restrictions and the groundwater picture decide what is allowed and what a lender will finance. The roughly 1,000 acres under permanent Army management hold landfills, waste consolidation areas and groundwater treatment facilities, which is why a current boundary survey comes first. We read those records with you before pricing and show any extra soil handling as its own line.

How much time does environmental diligence add?

A Phase I report usually takes a few weeks, and a Phase II adds sampling and lab time on top. We run preconstruction, preliminary pricing and utility inquiries during that window so the calendar is not simply paused. If sampling finds something, we already have a draft earthwork plan to adjust instead of starting over.

Will groundwater affect our foundations?

We start with the geotechnical report. If it shows groundwater inside the excavation depth, we plan dewatering and the discharge approval before foundation work is scheduled. Because groundwater treatment is still ongoing at the former arsenal, we treat any water leaving a site here as something to document and not something to pump to the nearest inlet.

Is a rail spur realistic on a parcel here?

Some parcels in this part of Adams County have rail frontage and many do not. A spur needs enough straight length for the cars you expect, a turnout agreement with the railroad and drainage that does not wash ballast. We check the physical room and the railroad process in the first weeks, before you commit to a building footprint that depends on it.

Which building code will our plans be reviewed under?

That depends on the jurisdiction that holds the parcel and the date your application is complete. Adams County appeared on the 2018 I-codes in the January 2026 regional tracker, but cities inside and next to the county can differ. We confirm the edition and any local amendments with the building department before the design is frozen.

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