US Bridges

RD 36 over Wolf CR

Fair

Lincoln County, Montana · Wolf Creek MP 12.8 · Structure no. 011406000000243

Built
1969
56 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
44 ft
2 main spans
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

RD 36 over Wolf CR is a wood or timber stringer/multi-beam or girder carrying RD 36 over Wolf CR in Lincoln County, Montana. It was built in 1969, so it is 56 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 5 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 44 ft (13.4 m) long and 29 ft wide.

Location

Open in Google Maps
CarriesRD 36
CrossesWolf CR
LocationWolf Creek MP 12.8
RouteFederal Lands Road 36
CountyLincoln County
StateMontana
Coordinates48.299, -115.04344
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.2 US tons
Inventory rating47.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadUnknown
Structure length44 ft (13.4 m)
Longest span21 ft (6.5 m)
Deck width29 ft (8.9 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 36 over Wolf CR built?

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

What condition is RD 36 over Wolf CR 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 36 over Wolf CR carry?

About 50 vehicles per day (latest count).

How long is RD 36 over Wolf CR?

The structure is 44 ft (13.4 m) long with a longest span of 21 ft (6.5 m) and a deck 29 ft wide.

Who owns RD 36 over Wolf CR?

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