US Bridges

Weaver RD over Pinkham Creek

Good

Lincoln County, Montana · Pinkham Creek · Structure no. 011401000000087

Built
1988
37 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
33 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Weaver RD over Pinkham Creek is a prestressed concrete stringer/multi-beam or girder carrying Weaver RD over Pinkham Creek in Lincoln County, Montana. It was built in 1988, so it is 37 years old, younger than the Montana average of 47 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 33 ft (10 m) long and 20 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesWeaver RD
CrossesPinkham Creek
LocationPinkham Creek
RouteFederal Lands Road 7976
StateMontana
Coordinates48.83158, -115.22853
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating47.5 US tons
Inventory rating36.4 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length33 ft (10 m)
Longest span31 ft (9.5 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Weaver RD over Pinkham Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is Weaver RD over Pinkham Creek 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 Weaver RD over Pinkham Creek carry?

About 50 vehicles per day (latest count).

How long is Weaver RD over Pinkham Creek?

The structure is 33 ft (10 m) long with a longest span of 31 ft (9.5 m) and a deck 20 ft wide.

Who owns Weaver RD over Pinkham Creek?

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