US Bridges

County Road 103 over Laramie River

Good

Larimer County, Colorado · 15. MI N of ST HWY 14 · Structure no. LR103-15.0-S14A

Built
1991
34 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
57
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 103 over Laramie River is a prestressed concrete box beam or girders - single or spread carrying County Road 103 over Laramie River in Larimer County, Colorado. It was built in 1991, so it is 34 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 57 vehicles a day, roughly 8% of them trucks, projected to reach 72 by 2042. The structure is 65 ft (19.7 m) long and 34 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

Location

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CarriesCounty Road 103
CrossesLaramie River
Location15. MI N of ST HWY 14
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.78853, -105.88244
Functional classRural Major Collector

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.
Substructure7 GoodSome minor problems.
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 evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37.1 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length65 ft (19.7 m)
Longest span59 ft (18.1 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57 (2023)
Projected traffic72 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 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 103 over Laramie River built?

It was built in 1991, making it 34 years old in 2025.

What condition is County Road 103 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 103 over Laramie River carry?

About 57 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is County Road 103 over Laramie River?

The structure is 65 ft (19.7 m) long with a longest span of 59 ft (18.1 m) and a deck 34 ft wide.

Who owns County Road 103 over Laramie River?

It is owned by the County Highway Agency.