US Bridges

Fdr 597 over Florida River

Good

La Plata County, Colorado · 16.5 MI NE of Durango · Structure no. 021308000001003

Built
1949
76 years old, rebuilt 2000
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
43 ft
2 main spans
Daily traffic
84
2003 count
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 597 over Florida River is a wood or timber stringer/multi-beam or girder carrying Fdr 597 over Florida River in La Plata County, Colorado. It was built in 1949 and reconstructed in 2000, so it is 76 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 84 vehicles a day, projected to reach 126 by 2045. The structure is 43 ft (13.1 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesFdr 597
CrossesFlorida River
Location16.5 MI NE of Durango
RouteFederal Lands Road 597
Coordinates37.45393, -107.68206
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
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 evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating82.9 US tons
Inventory rating63.9 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadHS 20
Structure length43 ft (13.1 m)
Longest span21 ft (6.4 m)
Deck width16 ft (5 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic84 (2003)
Projected traffic126 by 2045
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 proposedDeck replacement with only incidental widening
Estimated improvement cost$90.4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Fdr 597 over Florida River built?

It was built in 1949, making it 76 years old in 2025. It was reconstructed in 2000.

What condition is Fdr 597 over Florida River 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 597 over Florida River carry?

About 84 vehicles per day (2003 count).

How long is Fdr 597 over Florida River?

The structure is 43 ft (13.1 m) long with a longest span of 21 ft (6.4 m) and a deck 16 ft wide.

Who owns Fdr 597 over Florida River?

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