US Bridges

S 327 over Little Muddy Creek

Fair

Roosevelt County, Montana · 3M SE Bainville · Structure no. 000000202007055

Built
2020
5 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
142 ft
3 main spans
Daily traffic
267
2023 count
Owner
State
State Highway Agency

About this bridge

S 327 over Little Muddy Creek is a prestressed concrete stringer/multi-beam or girder carrying S 327 over Little Muddy Creek in Roosevelt County, Montana. It was built in 2020, so it is 5 years old, younger 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 267 vehicles a day, roughly 26% of them trucks, projected to reach 282 by 2043. The structure is 142 ft (43.2 m) long and 33 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

Open in Google Maps
CarriesS 327
CrossesLittle Muddy Creek
Location3M SE Bainville
RouteState Highway 327
CountyRoosevelt County
StateMontana
Coordinates48.11886, -104.16048
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating51 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length142 ft (43.2 m)
Longest span79 ft (24.1 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic267 (2023)
Projected traffic282 by 2043
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S 327 over Little Muddy Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is S 327 over Little Muddy 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 December 2024.

How much traffic does S 327 over Little Muddy Creek carry?

About 267 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is S 327 over Little Muddy Creek?

The structure is 142 ft (43.2 m) long with a longest span of 79 ft (24.1 m) and a deck 33 ft wide.

Who owns S 327 over Little Muddy Creek?

It is owned by the State Highway Agency.