US Bridges

Goulding Creek RD over Harper`s Coulee

Fair

Musselshell County, Montana · 11M SW Roundup · Structure no. S00381004+04001

Built
1954
71 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
39 ft
2 main spans
Daily traffic
137
2023 count
Owner
State
State Highway Agency

About this bridge

Goulding Creek RD over Harper`s Coulee is a wood or timber stringer/multi-beam or girder carrying Goulding Creek RD over Harper`s Coulee in Musselshell County, Montana. It was built in 1954, so it is 71 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 137 vehicles a day, roughly 4% of them trucks, projected to reach 144 by 2043. The structure is 39 ft (11.9 m) long and 26 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

Location

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CarriesGoulding Creek RD
CrossesHarper`s Coulee
Location11M SW Roundup
RouteState Highway 381
CountyMusselshell County
StateMontana
Coordinates46.32152, -108.61542
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 15
Structure length39 ft (11.9 m)
Longest span19 ft (5.8 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic137 (2023)
Projected traffic144 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Goulding Creek RD over Harper`s Coulee built?

It was built in 1954, making it 71 years old in 2025.

What condition is Goulding Creek RD over Harper`s Coulee 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 October 2024.

How much traffic does Goulding Creek RD over Harper`s Coulee carry?

About 137 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Goulding Creek RD over Harper`s Coulee?

The structure is 39 ft (11.9 m) long with a longest span of 19 ft (5.8 m) and a deck 26 ft wide.

Who owns Goulding Creek RD over Harper`s Coulee?

It is owned by the State Highway Agency.