US Bridges

Fdr 260 over Alamosa River

Fair

Conejos County, Colorado · 17 MI Ssw of Monte Vista · Structure no. 020903000001029

Built
1933
92 years old, rebuilt 1992
Condition
Fair
inspected July 2023
Type
Girder and Floorbeam System
Steel
Length
43 ft
1 main span
Daily traffic
18
2002 count
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 260 over Alamosa River is a steel girder and floorbeam system carrying Fdr 260 over Alamosa River in Conejos County, Colorado. It was built in 1933 and reconstructed in 1992, so it is 92 years old, older 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 18 vehicles a day, projected to reach 10 by 2012. The structure is 43 ft (13.1 m) long and 15 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
CarriesFdr 260
CrossesAlamosa River
Location17 MI Ssw of Monte Vista
RouteFederal Lands Road 260
CountyConejos County
StateColorado
Coordinates37.38975, -106.37842
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating23.9 US tons
Inventory rating18.5 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length43 ft (13.1 m)
Longest span40 ft (12.2 m)
Deck width15 ft (4.7 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18 (2002)
Projected traffic10 by 2012
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$168,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Fdr 260 over Alamosa River built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 1992.

What condition is Fdr 260 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 July 2023.

How much traffic does Fdr 260 over Alamosa River carry?

About 18 vehicles per day (2002 count).

How long is Fdr 260 over Alamosa River?

The structure is 43 ft (13.1 m) long with a longest span of 40 ft (12.2 m) and a deck 15 ft wide.

Who owns Fdr 260 over Alamosa River?

It is owned by the U.S. Forest Service.