US Bridges

County Road 21 over Jarosa Creek

Fair

Costilla County, Colorado · 1 MI S of CR E.5 · Structure no. CS21-S4.3-J.2

Built
2005
20 years old
Condition
Fair
inspected March 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
38 ft
1 main span
Daily traffic
58
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 21 over Jarosa Creek is a steel stringer/multi-beam or girder carrying County Road 21 over Jarosa Creek in Costilla County, Colorado. It was built in 2005, so it is 20 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.

It carries about 58 vehicles a day, projected to reach 65 by 2042. The structure is 38 ft (11.7 m) long and 28 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesCounty Road 21
CrossesJarosa Creek
Location1 MI S of CR E.5
RouteCounty Highway 0
CountyCostilla County
StateColorado
Coordinates37.05464, -105.39439
Functional classRural Minor Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating27.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length38 ft (11.7 m)
Longest span35 ft (10.8 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58 (2022)
Projected traffic65 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 21 over Jarosa Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is County Road 21 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 March 2025.

How much traffic does County Road 21 over Jarosa Creek carry?

About 58 vehicles per day (2022 count).

How long is County Road 21 over Jarosa Creek?

The structure is 38 ft (11.7 m) long with a longest span of 35 ft (10.8 m) and a deck 28 ft wide.

Who owns County Road 21 over Jarosa Creek?

It is owned by the County Highway Agency.