US Bridges

County Road 15 over Alamosa River

Fair

Conejos County, Colorado · 1.0 MI N of SH 15 · Structure no. CON02.0E-14.8NA

Built
2000
25 years old
Condition
Fair
inspected March 2025
Type
Box Beam or Girders - Multiple
Concrete
Length
33 ft
1 main span
Daily traffic
62
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 15 over Alamosa River is a concrete box beam or girders - multiple carrying County Road 15 over Alamosa River in Conejos County, Colorado. It was built in 2000, so it is 25 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 62 vehicles a day, projected to reach 72 by 2042. The structure is 33 ft (10.2 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty Road 15
CrossesAlamosa River
Location1.0 MI N of SH 15
RouteCounty Highway 0
CountyConejos County
StateColorado
Coordinates37.29785, -105.98329
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating103.5 US tons
Inventory rating61.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length33 ft (10.2 m)
Longest span31 ft (9.4 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62 (2022)
Projected traffic72 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 15 over Alamosa River built?

It was built in 2000, making it 25 years old in 2025.

What condition is County Road 15 over Alamosa River 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 15 over Alamosa River carry?

About 62 vehicles per day (2022 count).

How long is County Road 15 over Alamosa River?

The structure is 33 ft (10.2 m) long with a longest span of 31 ft (9.4 m) and a deck 32 ft wide.

Who owns County Road 15 over Alamosa River?

It is owned by the County Highway Agency.