US Bridges

County Road 80C over Laramie River

Good

Larimer County, Colorado · 0.3 MI W of CO RD 103 · Structure no. LR80C-5.0-190-A

Built
1999
26 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
13
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 80C over Laramie River is a prestressed concrete box beam or girders - single or spread carrying County Road 80C over Laramie River in Larimer County, Colorado. It was built in 1999, so it is 26 years old, younger than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 13 vehicles a day, projected to reach 16 by 2042. The structure is 70 ft (21.4 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCounty Road 80C
CrossesLaramie River
Location0.3 MI W of CO RD 103
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.87169, -105.91447
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.9 US tons
Inventory rating39.9 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length70 ft (21.4 m)
Longest span65 ft (19.8 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13 (2023)
Projected traffic16 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 County Road 80C over Laramie River built?

It was built in 1999, making it 26 years old in 2025.

What condition is County Road 80C over Laramie River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does County Road 80C over Laramie River carry?

About 13 vehicles per day (2023 count).

How long is County Road 80C over Laramie River?

The structure is 70 ft (21.4 m) long with a longest span of 65 ft (19.8 m) and a deck 34 ft wide.

Who owns County Road 80C over Laramie River?

It is owned by the County Highway Agency.