US Bridges

County RD 37.7 over Jarosa Creek

FairPosted for load

Las Animas County, Colorado · 0.2 MI S of CR 42 · Structure no. LA377-20-22-14A

Built
1985
40 years old
Condition
Fair
inspected May 2023
Type
Girder and Floorbeam System
Steel
Length
28 ft
1 main span
Daily traffic
32
2022 count
Owner
County
County Highway Agency

About this bridge

County RD 37.7 over Jarosa Creek is a steel girder and floorbeam system carrying County RD 37.7 over Jarosa Creek in Las Animas County, Colorado. It was built in 1985, so it is 40 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 32 vehicles a day, roughly 2% of them trucks, projected to reach 39 by 2042. The structure is 28 ft (8.4 m) long and 16 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesCounty RD 37.7
CrossesJarosa Creek
Location0.2 MI S of CR 42
RouteCounty Highway 0
CountyLas Animas County
StateColorado
Coordinates37.30341, -104.79079
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating9.9 US tons
Inventory rating6 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckOpen grating
Main spans1
Design loadUnknown
Structure length28 ft (8.4 m)
Longest span22 ft (6.7 m)
Deck width16 ft (5 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32 (2022)
Projected traffic39 by 2042
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$992,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 37.7 over Jarosa Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is County RD 37.7 over Jarosa 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 May 2023.

How much traffic does County RD 37.7 over Jarosa Creek carry?

About 32 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is County RD 37.7 over Jarosa Creek?

The structure is 28 ft (8.4 m) long with a longest span of 22 ft (6.7 m) and a deck 16 ft wide.

Who owns County RD 37.7 over Jarosa Creek?

It is owned by the County Highway Agency.