US Bridges

County Road 641 over Sheep Creek 002

PoorPosted for load

Roosevelt County, Montana · 6M NW Mccabe · Structure no. L43641002+03001

Built
1986
39 years old, rebuilt 2011
Condition
Poor
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
29 ft
1 main span
Daily traffic
9
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 641 over Sheep Creek 002 is a steel stringer/multi-beam or girder carrying County Road 641 over Sheep Creek 002 in Roosevelt County, Montana. It was built in 1986 and reconstructed in 2011, so it is 39 years old, younger than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 9 vehicles a day, roughly 3% of them trucks, projected to reach 9 by 2043. The structure is 29 ft (8.7 m) long and 20 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty Road 641
CrossesSheep Creek 002
Location6M NW Mccabe
RouteCounty Highway 43641
CountyRoosevelt County
StateMontana
Coordinates48.27359, -104.44504
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length29 ft (8.7 m)
Longest span27 ft (8.2 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9 (2023)
Projected traffic9 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$122,000
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 641 over Sheep Creek 002 built?

It was built in 1986, making it 39 years old in 2025. It was reconstructed in 2011.

What condition is County Road 641 over Sheep Creek 002 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2023.

How much traffic does County Road 641 over Sheep Creek 002 carry?

About 9 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is County Road 641 over Sheep Creek 002?

The structure is 29 ft (8.7 m) long with a longest span of 27 ft (8.2 m) and a deck 20 ft wide.

Who owns County Road 641 over Sheep Creek 002?

It is owned by the County Highway Agency.