US Bridges

Fdr 250 over Alamosa River

Poor

Conejos County, Colorado · 23.5 MI Ssw of Del Norte · Structure no. 020903000001027

Built
1953
72 years old, rebuilt 1992
Condition
Poor
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
52 ft
1 main span
Daily traffic
79
2002 count
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 250 over Alamosa River is a steel stringer/multi-beam or girder carrying Fdr 250 over Alamosa River in Conejos County, Colorado. It was built in 1953 and reconstructed in 1992, so it is 72 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 79 vehicles a day, projected to reach 30 by 2012. The structure is 52 ft (15.8 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesFdr 250
CrossesAlamosa River
Location23.5 MI Ssw of Del Norte
RouteFederal Lands Road 250
Coordinates37.38363, -106.5675
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating36.4 US tons
Inventory rating27.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length52 ft (15.8 m)
Longest span49 ft (14.9 m)
Deck width16 ft (5 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic79 (2002)
Projected traffic30 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$26,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Fdr 250 over Alamosa River built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1992.

What condition is Fdr 250 over Alamosa River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2023.

How much traffic does Fdr 250 over Alamosa River carry?

About 79 vehicles per day (2002 count).

How long is Fdr 250 over Alamosa River?

The structure is 52 ft (15.8 m) long with a longest span of 49 ft (14.9 m) and a deck 16 ft wide.

Who owns Fdr 250 over Alamosa River?

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