US Bridges

Fdr 688 over West Dolores River

Fair

Dolores County, Colorado · 14.5 MI NE of Dolores · Structure no. 021302000001019

Built
1959
66 years old, rebuilt 2000
Condition
Fair
inspected July 2023
Type
Tee Beam
Prestressed Concrete
Length
53 ft
2 main spans
Daily traffic
15
2002 count
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 688 over West Dolores River is a prestressed concrete tee beam carrying Fdr 688 over West Dolores River in Dolores County, Colorado. It was built in 1959 and reconstructed in 2000, so it is 66 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 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 15 vehicles a day, projected to reach 10 by 2012. The structure is 53 ft (16.2 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 688
CrossesWest Dolores River
Location14.5 MI NE of Dolores
RouteFederal Lands Road 688
CountyDolores County
StateColorado
Coordinates37.6324, -108.33572
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating22 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length53 ft (16.2 m)
Longest span24 ft (7.3 m)
Deck width15 ft (4.7 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$192,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Fdr 688 over West Dolores River built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2000.

What condition is Fdr 688 over West Dolores 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 688 over West Dolores River carry?

About 15 vehicles per day (2002 count).

How long is Fdr 688 over West Dolores River?

The structure is 53 ft (16.2 m) long with a longest span of 24 ft (7.3 m) and a deck 15 ft wide.

Who owns Fdr 688 over West Dolores River?

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