Electrical Duct Banks in Abilene, Texas

Duct banks are the part of an electrical system that nobody sees and everybody depends on. Conduits stacked in a trench, spaced on plastic separators and encased in red-dyed concrete carry feeders to a school, a hospital pad, a pump station or a substation for decades, and the work has to be right before the pavement closes over it. We build electrical duct banks for Abilene owners and utilities with the slow, documented method that kind of permanence demands.

A duct bank is a coordination problem as much as a pour. The electrical engineer draws the conduit count and arrangement, the utility sets its own clearances and sweep radii, the civil engineer fixes the trench elevation and the geotechnical report says how the trench walls will behave. Our job is to reconcile them in the field, set spacers and rebar to the drawn pattern and place the encasement without floating the conduits.

We coordinate trade partners for the trenching and for pulling cable, and the concrete trade partners form, reinforce and place the concrete envelope, pads, manhole and handhole bases and transformer pads that belong to the system. Spare conduits are capped and marked, pull strings are installed and each run is tested with a mandrel before we close the trench. Mandrel testing catches a crushed or offset joint while the trench is still open, when a repair takes an hour instead of a week, and the technician's initials on the test sheet go into the record we hand to the owner.

Where the duct bank sits on the critical path

On most campus and healthcare projects, power has to be available before the building can be commissioned, and the duct bank has to be in before the paving, the landscaping and sometimes the slab. We ask the utility for its design and inspection lead times early, because a transformer order or a utility review can take longer than the trench itself.

Pours are usually done in stages: a base layer, spacers and conduit, then side and top encasement. Each stage waits on an inspection by the electrical inspector or the utility, and the dye in the concrete lets future excavators know what lies below. Abilene Christian University enrolled a record 7,274 students in fall 2025, while McMurry University reported a record 4,144 including dual credit students, and campuses with growth like that add feeders, lighting and communications in phases; we schedule each phase so earlier ducts stay intact and spare capacity is available.

Clearances, cover and inspection

The adopted electrical code, the serving utility's construction standards and the project specifications together set the minimum depth, conduit type, bend radius, spacing and encasement. Where the standards differ, the stricter requirement applies, and the engineer of record resolves any conflict in writing before we proceed.

We obtain the utility's approved layout, schedule the inspection for before concrete is placed and keep records of conduit counts, sizes and sweeps. Warning tape or marker is placed above the encasement at the specified height, and tracer wire or a detectable marker is included when the owner requires it. As-built survey points are captured before backfill, so the final plans show the true route. A duct bank that is mapped accurately saves the next contractor on the campus from a damaging strike, and owners who maintain large grounds tell us that is the document they reach for most often.

Work around energized lines

Trenching near live electrical service is one of the most hazardous tasks on a site. We require one-call locates, potholing of every marked line within the work zone and hand digging near the marked path. Equipment operators receive a briefing on overhead clearances, and a spotter is posted whenever a boom or excavator works near a line. Every worker in the trench knows where the nearest ladder is, who holds the stop-work authority and which utility emergency number to call, and these are posted at the gate beside the permit set.

When an existing feeder must be crossed, the utility or the electrical contractor sets the protection plan: how much separation, what warning means and when to stop. Heat is a further concern; For Coleman work, plan for summer heat: 114 degrees F is the local record high, while average yearly precipitation is about 27.88 inches. Summer work in concrete and steel calls for shade, water and scheduled breaks, with pours placed in the cooler hours.

Routes across the region

We mobilize to Abilene projects and to towns along the highway corridors. Interstate 20 bends along the north side of Abilene between exits 279 and 292, roughly 149 miles west of Fort Worth, and projects along that loop, from retail pads to school sites, depend on feeders that cross or follow the highway right-of-way.

Crossings of public roads require permits and sometimes boring, which we coordinate with partners. For work inside the city limits, see our pages for Abilene and the Interstate 20 corridor, and for wind and utility sites ask us about remote mobilization. Travel to distant towns is itemized in the proposal.

Concrete encasement and trade coordination

The concrete trade partners place and finish duct bank encasement, transformer and switchgear pads, handholes, pull box bases and equipment slabs. Pad dimensions, embedded bolt patterns and conduit stub-ups are set from the manufacturer's drawings, and we check them against the shop drawing before the pour. A transformer pad is poured level and with its stub-ups inside the footprint of the enclosure opening, because a conduit set a few inches out of position means rework with a unit already on the truck.

The related services are on separate pages: conduit and fiber trenching for lighter systems, utility potholing and locating before any dig, and site utilities for the full coordinated package. We serve utilities and energy companies as well as owners who build their own distribution, and the hospital or school pad usually needs both.

Review your feeder route with us

Bring the one-line diagram and the civil site plan, and we will check conduit counts, elevations, clearances and the pour sequence against the utility's requirements. Reach us through the contact form or by phone.

Common Questions

Why is duct bank concrete red?

The dye is a visual warning. A crew digging later who exposes red concrete knows that energized conduits are close, and can switch to hand tools. The color and the warning tape are included in many utility standards.

How do you keep conduits from floating during the pour?

Spacers hold the conduits at the drawn spacing, and ties or stakes hold the assembly down against the buoyant load of wet concrete. We place concrete in lifts, vibrate carefully and check conduit alignment after each lift.

Can spare conduits be added later?

Adding to a buried bank is difficult and costly, so we recommend including spares in the first installation. Capped, marked and surveyed spares are far cheaper than a new trench through finished pavement.

Who pulls the cable?

The electrical contractor, after we turn over tested conduits. We coordinate the handover with the electrician and the inspector and provide the as-built drawing.

What does the utility require before we pour?

Most utilities require an approved layout, an inspection of the open trench with conduits and spacers, and a record of conduit sizes. We request the inspection date in advance so concrete trucks are not scheduled before the approval is in hand.