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Steel bridges

Steel bridge construction for driveways, ranches and access roads

Bolt-together galvanized steel girder bridges over creeks and ditches, with the abutments, earthwork and installation done by Coal Creek Excavation.

Get a bridge quote Call (303) 859-9513

What we build

Steel bridge superstructures over creeks and ditches

We build steel bridges for private driveways, ranch and residential access, and commercial access where a road has to cross a creek, an irrigation ditch or a failing culvert.

  • Private driveway bridges
  • Ranch and residential access bridges
  • Commercial access crossings
  • Replacing an old bridge or an undersized culvert

We are an excavation contractor, so the dirt and concrete side of a bridge is our everyday work: abutments, approaches, grading, drainage and creek work.

Longmont Dam Road bridge, past Coal Creek Excavation bridge work
Longmont Dam Road bridge, past Coal Creek Excavation steel bridge work.
Bridge kits

Bolt-together galvanized steel girder kits

Each bridge is a kit of galvanized steel parts that bolt together on site, sized to the span, width and loading your crossing needs.

Spans from 12 to 60 feet

Bolt-together galvanized steel girder bridge kits for crossings from about 12 to 60 feet.

What’s in a kit

Main girders, bolted crossmembers, a steel deck pan or a timber deck, and guardrail or timber rails.

Load tiers

From pedestrian and light-vehicle crossings up to HS-20 / HL-93 highway design loading, with options designed to suit fire-access requirements. The rating for your crossing is set by the PE’s design for your site.

The site work, too

Coal Creek Excavation builds the abutments, does the earthwork and creek or culvert work, and installs the bridge.

How it works

From site visit to finished crossing

  1. Site visit. We look at the crossing, the banks, access for trucks and equipment, and what needs to drive over it.
  2. Design. Your bridge is engineered to your site by a licensed PE, based on the span, width, loading and site conditions.
  3. Permits. We work through what your county, town, floodplain office or ditch company needs for the crossing.
  4. Abutments and earthwork. We build the abutments, grade the approaches and handle creek or culvert work.
  5. Install. The kit is delivered, bolted together and set, then the deck and rails go on.
Excavator unloading steel bridge members from a flatbed at a Larimer County residential bridge project
Larimer County residential bridge project. More on our projects page.
Southwest Colorado

Building a bridge near Pagosa Springs?

We take steel bridge projects in Pagosa Springs and Archuleta County, from our office in Erie.

Steel bridges in Pagosa Springs
Bridge quote

Tell us about your crossing

Send what you know and leave the rest blank. We will call to talk it through and set up a site visit.

  • Where the crossing is (town, county or address)
  • What it crosses: creek, ditch, culvert replacement or other
  • Rough span (bank to bank) and the width you need
  • The heaviest vehicle that will use it, such as a pickup, a delivery truck or a fire engine
  • Whether abutments exist now, and your timing

Photos of both banks help. You can attach them in the email that opens.

Call (303) 859-9513

This opens your email app with your request filled in. Prefer to talk? Call (303) 859-9513.

FAQ

Frequently asked questions

What kinds of steel bridges do you build?

Steel bridge superstructures for private driveways, ranch and residential access, and commercial access over creeks and ditches. They are bolt-together galvanized steel girder kits.

What spans can a bridge kit cover?

About 12 to 60 feet.

What comes in a kit?

Main girders, bolted crossmembers, a steel deck pan or a timber deck, and guardrail or timber rails.

How much weight can the bridge carry?

Kits come in load tiers from pedestrian and light vehicle up to HS-20 / HL-93 highway design loading, with options designed to suit fire-access requirements. The rating for your bridge is set when it is engineered to your site by a licensed PE.

Do you build the abutments and install the bridge?

Yes. Coal Creek Excavation does the abutments, earthwork, culvert or creek work, and installation.

Do I need a permit for a bridge?

Often, yes. A crossing over a creek, ditch or floodplain can need county, floodplain or ditch-company approval. We work through what your crossing needs with you during planning.

How much does a steel bridge cost?

It depends on the span, width, loading, abutments and how hard the site is to reach, so we price each crossing after a site visit. Call (303) 859-9513 or send the bridge quote form.

Where do you build bridges?

From our office in Erie we work across Boulder County, Larimer County and the Front Range, and we take bridge projects in Pagosa Springs and Archuleta County.