US Bridges

County Road 37 over Fish Creek

Fair

Routt County, Colorado · 2.5 MI E of CO RD 37A · Structure no. 107003702.50962

Built
1990
35 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
23 ft
1 main span
Daily traffic
49
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 37 over Fish Creek is a steel stringer/multi-beam or girder carrying County Road 37 over Fish Creek in Routt County, Colorado. It was built in 1990, so it is 35 years old, younger 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 49 vehicles a day, roughly 37% of them trucks, projected to reach 58 by 2042. The structure is 23 ft (7 m) long and 30 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesCounty Road 37
CrossesFish Creek
Location2.5 MI E of CO RD 37A
RouteCounty Highway 0
Coordinates40.33428, -107.14019
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.7 US tons
Inventory rating17.2 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length23 ft (7 m)
Longest span21 ft (6.4 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49 (2023)
Projected traffic58 by 2042
Trucks37%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 37 over Fish Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is County Road 37 over Fish Creek 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 October 2024.

How much traffic does County Road 37 over Fish Creek carry?

About 49 vehicles per day (2023 count), of which roughly 37% are trucks.

How long is County Road 37 over Fish Creek?

The structure is 23 ft (7 m) long with a longest span of 21 ft (6.4 m) and a deck 30 ft wide.

Who owns County Road 37 over Fish Creek?

It is owned by the County Highway Agency.