US Bridges

West Frontage Road over Sequine Gulch SR

Fair

Weld County, Colorado · 5.4 Miles NE of JCT SH 7 · Structure no. D-18-BP

Built
1981
44 years old
Condition
Fair
inspected January 2023
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
380
2023 count
Owner
State
State Highway Agency

About this bridge

West Frontage Road over Sequine Gulch SR is a concrete culvert carrying West Frontage Road over Sequine Gulch SR in Weld County, Colorado. It was built in 1981, so it is 44 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 380 vehicles a day, roughly 18% of them trucks, projected to reach 540 by 2042. The structure is 24 ft (7.3 m) long and 60 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesWest Frontage Road
CrossesSequine Gulch SR
Location5.4 Miles NE of JCT SH 7
RouteInterstate 76A
CountyWeld County
StateColorado
Coordinates40.04615, -104.6706
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span10 ft (3 m)
Deck width60 ft (18.3 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic380 (2023)
Projected traffic540 by 2042
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was West Frontage Road over Sequine Gulch SR built?

It was built in 1981, making it 44 years old in 2025.

What condition is West Frontage Road over Sequine Gulch SR in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2023.

How much traffic does West Frontage Road over Sequine Gulch SR carry?

About 380 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is West Frontage Road over Sequine Gulch SR?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m) and a deck 60 ft wide.

Who owns West Frontage Road over Sequine Gulch SR?

It is owned by the State Highway Agency.