Site Utilities Packages for Denver Metro Industrial Projects

Thirty-six inches of frost depth decides how deep everything underground has to go. Lakewood's design load handout lists that frost depth along with a 30 psf ground snow load, and cover requirements like it govern water, sewer and conduit trenches across the metro. Utility corridors on an industrial site are the arteries of the building, and they are cheaper to build correctly the first time than to repair under a finished slab.

We install the underground and site-level utilities that serve industrial buildings: domestic water, fire service, sanitary sewer, storm drainage, natural gas, electrical and communications conduits, process water and wastewater lines, and the trenching, bedding, testing and restoration that go with them.

The package sits between mass grading and the building foundations, which makes sequencing the main skill. A utility in the wrong place at the wrong time can hold up footings, paving or the entire site.

Coordinating Elevations and Crossings

Gravity lines control the layout, so we start with sanitary and storm sewer inverts, then place pressure lines above or below them with the required separation. Every crossing is drawn in profile before trenching begins, and we verify existing utility depths by potholing where records are incomplete.

We stake lines from the survey model, install pipe on laser-controlled grades and check elevations at each joint and manhole. Conflicts are resolved by an immediate field meeting with the engineer rather than a quiet adjustment that creates a violation later.

Systems in the Package

The package typically includes water service and meter vaults, backflow preventers, sanitary sewer laterals and manholes, grease or sand-oil interceptors where required, gas service and regulator pads, underground electrical conduit and handholes, telecom conduits and site lighting duct. Process owners may add compressed air, industrial wastewater pretreatment and cooling water loops.

Fire protection mains and hydrants are often priced as part of the same package; our dedicated fire water loop and hydrant systems page describes how we approach them in detail. Electrical duct banks are likewise covered in electrical duct bank and underground work.

Multi-Building Campuses and Shared Infrastructure

Campus-scale developments force utilities to be designed for the whole before they are built for the first. Crossroads 25 in Thornton is a six-building, 76-acre park, and Aurora Highlands, a roughly 4,000-acre development southeast of the airport, gained an $87 million full E-470 interchange that opened June 28, 2024. Growth areas like these push utility providers to extend mains well ahead of buildings.

When we serve a single building on such a campus, we build to the master utility plan, size mains to the full buildout and stub services at future pad locations. Doing so avoids cutting new pavement later and gives the developer a clean basis for tenant improvements.

Utility Provider Timelines

Gas and electric providers, water districts and sanitary agencies each have their own design, approval and construction windows, and they rarely line up. We request will-serve letters and load studies early, obtain service applications as soon as design allows and track every provider's work in our schedule. A transformer set date or a water tap appointment is treated like any other critical milestone.

Within our own work, we pace trenching to the capacity of the compaction and testing crews, so that open trench stays short and the site remains passable for trucks and cranes.

Trench Safety and Locates

Underground work carries risks that the public rarely sees. We use utility locating, hand digging near live lines, shoring or sloping to OSHA standards and daily inspections by a competent person. Excavations are barricaded, ladders are placed and spoil is kept back from the edge.

In older industrial districts, such as the areas around Globeville and Elyria-Swansea, abandoned lines and unmapped conduits are not unusual, so we price potholing and contingency for unexpected conflicts. Confined-space entry into manholes and vaults follows a written plan.

Where Utilities Meet the Rest of the Site

The package connects the work in stormwater detention and drainage to buildings and yards served by truck courts and trailer yards.

It also supports operators in data center and utilities and power work, where redundant services and large conduits shape the site layout.

Owners considering several buildings can ask us to price the whole utility spine under our ground-up industrial construction contract.

Testing, Inspection and Record Drawings

Pressure tests, mandrel and deflection tests, sewer televising, compaction tests and bacteriological sampling of water mains are all part of acceptance. The utility provider usually witnesses them, and passing is a precondition to connection. Inspectors also check bedding, tracer wire and warning tape.

We survey every line as it is installed, so as-built drawings are produced from field data instead of design intent. These records are used for utility acceptance and are delivered to the owner for future maintenance and expansion.

What Moves Utility Prices

Depth, length and ground drive the number. Deep sanitary sewers in wet soils need shoring and dewatering, long water mains need more pipe and more testing, and rock or cemented soils slow trenching considerably. Provider fees for taps, meters, transformers and system development are separate from construction cost and can be large on a big building, so we list them in the budget as owner or contractor items.

Demand also matters. A fulfillment center like the three-level, 855,000 square foot facility announced for I-25 and 144th Avenue in Thornton, with 1,500 full-time positions, draws on water, sewer and power at a scale that changes every service size in the package. We ask early for the operator's peak flows and loads, because oversizing a main by one step costs far less during construction than replacing it afterward.

Underground Work Done Once

Send us the civil set and utility letters. We will price the package, map the crossings and outline the order of work.

Common Questions

How deep do water and fire lines have to be buried?

Cover depends on the local frost depth and the utility provider standards. A frost depth like the 36 inches listed by Lakewood sets the minimum, with additional cover for traffic loads and crossings. We confirm the requirement for each jurisdiction.

Can we install utilities before the building permit is issued?

Sometimes. Some cities allow separate site utility permits, which can save weeks. We confirm with the plan reviewer and check that the underground layout will not change with the building design.

What is the biggest utility risk on an infill industrial lot?

Unknown existing lines. Old plants and yards often have abandoned or unrecorded pipes and conduits, so we pothole early and carry a contingency for relocation.

Should we oversize utilities for future expansion?

Usually yes for the parts that are hard to change, such as main lines, conduit counts and valve locations, and usually no for the expensive electrical gear that can be added later. We price the incremental cost of capacity so the choice is clear.

How are utility connections timed with the owner move-in?

Provider schedules drive the date. We make applications early and coordinate meter sets, gas turn-ons and transformer energization with commissioning.

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