US Bridges

RD 763 over Fisher Riv & RR Overpass

Fair

Lincoln County, Montana · Fisher River at Jennings · Structure no. 011406000000264

Built
1968
57 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
346 ft
4 main spans
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

RD 763 over Fisher Riv & RR Overpass is a prestressed concrete stringer/multi-beam or girder carrying RD 763 over Fisher Riv & RR Overpass in Lincoln County, Montana. It was built in 1968, so it is 57 years old, older than the Montana average of 47 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 346 ft (105.5 m) long and 33 ft wide.

Location

Open in Google Maps
CarriesRD 763
CrossesFisher Riv & RR Overpass
LocationFisher River at Jennings
RouteFederal Lands Road 763
CountyLincoln County
StateMontana
Coordinates48.35907, -115.32118
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34.3 US tons
Inventory rating26.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4 (+2 approach)
Design loadHS 20
Structure length346 ft (105.5 m)
Longest span100 ft (30.5 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byPrivate (other than railroad)
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was RD 763 over Fisher Riv & RR Overpass built?

It was built in 1968, making it 57 years old in 2025.

What condition is RD 763 over Fisher Riv & RR Overpass 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 September 2023.

How much traffic does RD 763 over Fisher Riv & RR Overpass carry?

About 50 vehicles per day (latest count).

How long is RD 763 over Fisher Riv & RR Overpass?

The structure is 346 ft (105.5 m) long with a longest span of 100 ft (30.5 m) and a deck 33 ft wide.

Who owns RD 763 over Fisher Riv & RR Overpass?

It is owned by the U.S. Forest Service and maintained by the Private (other than railroad).