US Bridges

Fdr 360 over South Fork

Fair

Rio Grande County, Colorado · 1.2 MI SW of South Fork · Structure no. 020905000001026

Built
1976
49 years old, rebuilt 1992
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
90 ft
3 main spans
Daily traffic
738
2002 count
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 360 over South Fork is a steel stringer/multi-beam or girder carrying Fdr 360 over South Fork in Rio Grande County, Colorado. It was built in 1976 and reconstructed in 1992, so it is 49 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 738 vehicles a day, roughly 9% of them trucks, projected to reach 260 by 2012. The structure is 90 ft (27.4 m) long and 26 ft wide. If it were closed, the detour would be 26.7 mi (43 km).

Location

Open in Google Maps
CarriesFdr 360
CrossesSouth Fork
Location1.2 MI SW of South Fork
RouteCounty Highway 360
CountyRio Grande County
StateColorado
Coordinates37.65289, -106.65417
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
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating42.1 US tons
Inventory rating32.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans3
Design loadHS 20 + Mod
Structure length90 ft (27.4 m)
Longest span60 ft (18.3 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic738 (2002)
Projected traffic260 by 2012
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.7 mi (43 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$33,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Fdr 360 over South Fork built?

It was built in 1976, making it 49 years old in 2025. It was reconstructed in 1992.

What condition is Fdr 360 over South Fork 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 June 2024.

How much traffic does Fdr 360 over South Fork carry?

About 738 vehicles per day (2002 count), of which roughly 9% are trucks.

How long is Fdr 360 over South Fork?

The structure is 90 ft (27.4 m) long with a longest span of 60 ft (18.3 m) and a deck 26 ft wide.

Who owns Fdr 360 over South Fork?

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