US Bridges

S 238-E Fork RD over E Fork Big Spring Creek

Fair

Fergus County, Montana · 8M SE Lewistown · Structure no. S00238010+00001

Built
1958
67 years old
Condition
Fair
inspected September 2024
Type
Slab
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
217
2023 count
Owner
State
State Highway Agency

About this bridge

S 238-E Fork RD over E Fork Big Spring Creek is a prestressed concrete slab carrying S 238-E Fork RD over E Fork Big Spring Creek in Fergus County, Montana. It was built in 1958, so it is 67 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 217 vehicles a day, roughly 1% of them trucks, projected to reach 228 by 2043. The structure is 30 ft (9.1 m) long and 23 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesS 238-E Fork RD
CrossesE Fork Big Spring Creek
Location8M SE Lewistown
RouteState Highway 238
CountyFergus County
StateMontana
Coordinates46.99901, -109.27404
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionSeptember 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.7 US tons
Inventory rating24.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width23 ft (6.9 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic217 (2023)
Projected traffic228 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$60,000
NavigationNo navigation control on waterway

Frequently asked questions

When was S 238-E Fork RD over E Fork Big Spring Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is S 238-E Fork RD over E Fork Big Spring Creek 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 2024.

How much traffic does S 238-E Fork RD over E Fork Big Spring Creek carry?

About 217 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is S 238-E Fork RD over E Fork Big Spring Creek?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 23 ft wide.

Who owns S 238-E Fork RD over E Fork Big Spring Creek?

It is owned by the State Highway Agency.