Denver ranks 10th among U.S. areas of at least 50,000 people for hailstorm risk, and a pole-mounted luminaire is one of the most exposed pieces of equipment on an industrial site. Yard lighting looks like a simple item until you account for hail, wind loading on the pole, frost depth at the base, and the fact that the fixtures run through every night shift for a decade or more. We specify and build it as electrical infrastructure, not as site decoration.
The scope covers the lighting design itself and everything that feeds it: the service from the utility, site distribution, conduit and pull boxes, pole foundations, luminaires, controls and the grounding that makes the system safe. For plants running 24 hours, the lights are a life-safety and security system as well. A dark dock apron is where forklift and truck collisions happen, so the target illumination levels are set with your safety lead rather than inherited from a template.
Because the lighting load is small compared with a process load, owners often treat it as a late-stage detail. We bring it forward. The conduit routes cross every paved area on the site, and if they are not coordinated before paving, someone ends up cutting concrete or leaving a lot dark.
Energy code, photometrics and utility rules
Colorado HB22-1362 requires any county or municipality that updates a building code on or after July 1, 2023 to adopt an energy code with equivalent or better performance than the 2021 IECC, and from July 1, 2026 the benchmark becomes the state model low energy and carbon code. Exterior lighting power, controls and shutoff requirements are part of those energy codes, so luminaire selection and control strategy follow the edition your jurisdiction has adopted, and we confirm that edition with the building department before releasing a lighting submittal.
Local ordinances add their own requirements: shielding, maximum light levels at the property line, pole heights and sometimes a curfew on non-essential lighting. Photometric calculations show those levels on a plan, and the building department typically wants them with the permit set. Electrical work is reviewed under the electrical code your jurisdiction adopted, and the utility reviews its own service requirements separately, which is why we start the utility conversation in the first weeks.
From the transformer to the last pole
We build the service entrance and metering coordination, switchboards or panels for site loads, trenching and duct banks, pull boxes, pole bases, poles, luminaires and controls. Transformer pads and switchboard foundations follow the methods in equipment pads and foundations. Where the site has long runs, we size conductors for voltage drop at the far pole rather than at the panel, and where the site may expand, we leave spare conduits and pull boxes at the edge of the first phase. For the larger feeders to production equipment, we use the same methods described under underground electrical duct banks.
Pole foundations are drilled concrete bases sized to the pole, fixture load and wind exposure, set below the frost depth in the project's design criteria. In clay soils, we check the base design against the geotechnical report, because expansive soil can heave a shallow base. Anchor bolt templates are held to tight tolerance, and the poles are plumbed and checked before the base cures fully.
Hail, wind and cold: specifying for the climate
Hail is the weather event that most often takes out site equipment on the Front Range, and Denver has had three of the ten costliest U.S. hailstorms (July 1990, July 2009, May 2017). We specify luminaires with durable lenses and housings suited to hail exposure, and we avoid fragile exposed glass. We also lay out the system so that no single fixture failure leaves a dock or an entrance dark.
Cold changes how electronics and conductors behave. Controllers, photocells and drivers are chosen for a wide operating temperature range, and pole-top equipment is selected with the thermal cycling in mind. We favor controls that default to a safe on state if a sensor fails, and we commission the system by driving each control zone through a full day-night cycle before turnover. If something is wrong, it should be found then, not in January.
Interfaces with paving, docks and security
Lighting lives at the boundary of several trades. The paving subcontractor needs conduit sleeves in place before the base is compacted, the fence contractor needs power for gate operators and cameras, and the dock equipment package needs its own circuits. We hold a coordination meeting before underground work and walk the routes with those trades so the conduits run where they will not be cut later. The fence and camera scope is described under fencing and security integration.
Photometric design also needs to reflect how the yard is used. The lots they light are covered under stabilized parking lots, and a typical warehouse yard shows why. A trailer lot with rows of parked trailers casts shadows that a drawing misses, and a dock apron with a forklift lane needs vertical illumination as well as horizontal. We adjust pole spacing, mounting height and aiming to match, and we confirm the result with a nighttime walk-through using a light meter.
Who uses this work most
Facilities with night operations feel the effect first. Northland Business Park, just off US 85 at Fort Lupton, sold 316 acres on November 18, 2024, including 103 acres of shovel-ready land across 15 parcels. Parks being assembled like that will need yard lighting designed for multiple tenants with different shift patterns, and the first buildings in a park often set the pole and conduit layout that later buildings inherit. See how we serve Fort Lupton sites.
Power infrastructure is the other end of the scale. The Fort St. Vrain station near Platteville is operated by Xcel Energy as a combined-cycle plant of roughly 965 MW, which shows the type of utility interconnect work that sits behind an industrial corridor. Our work for advanced manufacturing plants often includes a utility interconnect and site distribution, and the yard lighting and controls are tied into the plant's metering and building management.
Light the yard before the first night shift
Share the site plan, shift pattern and utility information and we will return a lighting layout, a conduit coordination plan and a controls approach. Contact Industrial Contractors of Colorado to begin.
Common Questions
How tall should poles be for a truck court?
Pole height is a trade-off between coverage and glare. Taller poles light a larger area with fewer fixtures, but they raise foundation loads and can spill light onto neighbors. We run the photometrics for several heights and mounting arrangements, then choose the combination that meets your light levels and the local lighting ordinance.
Can we add lighting to an existing yard without tearing up the pavement?
Yes, in many cases. We use directional boring or saw-cut trenches to cross pavement, and sometimes surface-mounted conduit along curbs. Pole bases can be drilled through existing paving and patched. We survey for buried utilities first, because an unknown line is the most common cause of delay.
What controls should we use?
Photocell and time-clock control is the baseline, and many owners add occupancy sensing or dimming for low-use periods. The local energy code may require specific controls, so we confirm that first. We also keep manual override at the panel for maintenance and emergencies.
How do you handle the utility interconnect?
We submit the load letter and site plan to the utility early, because it has its own design and construction queue. We coordinate transformer pad location, conduit stub-ups and metering with the utility's standards. That avoids a situation where the building is ready and the power is not.
What is the maintenance outlook for LED yard lighting?
LED fixtures last far longer than older lamps, but drivers and surge protection are still service items. We provide spares recommendations and a maintenance outline in the turnover package, and we label circuits so your electricians can isolate them quickly.