US Bridges

Fdr 686 over Stoner Mesa

Good

Dolores County, Colorado · .20 MI on Fdr 686 · Structure no. 021302000001165

Built
1969
56 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
73 ft
3 main spans
Daily traffic
18
2003 count
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 686 over Stoner Mesa is a steel continuous stringer/multi-beam or girder carrying Fdr 686 over Stoner Mesa in Dolores County, Colorado. It was built in 1969, so it is 56 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 18 vehicles a day, projected to reach 42 by 2013. The structure is 73 ft (22.3 m) long and 18 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesFdr 686
CrossesStoner Mesa
Location.20 MI on Fdr 686
RouteFederal Lands Road 686
Coordinates37.70844, -108.24512
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
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 evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating22.5 US tons
Inventory rating17.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length73 ft (22.3 m)
Longest span50 ft (15.2 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18 (2003)
Projected traffic42 by 2013
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$30,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Fdr 686 over Stoner Mesa built?

It was built in 1969, making it 56 years old in 2025.

What condition is Fdr 686 over Stoner Mesa in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does Fdr 686 over Stoner Mesa carry?

About 18 vehicles per day (2003 count).

How long is Fdr 686 over Stoner Mesa?

The structure is 73 ft (22.3 m) long with a longest span of 50 ft (15.2 m) and a deck 18 ft wide.

Who owns Fdr 686 over Stoner Mesa?

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