US Bridges

County Road 307 over Bennie Peer Creek 021

Fair

Richland County, Montana · 7M E Sidney · Structure no. L42307002+08001

Built
1997
28 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Prestressed Concrete
Length
98 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

County Road 307 over Bennie Peer Creek 021 is a prestressed concrete tee beam carrying County Road 307 over Bennie Peer Creek 021 in Richland County, Montana. It was built in 1997, so it is 28 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 98 ft (29.8 m) long and 30 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesCounty Road 307
CrossesBennie Peer Creek 021
Location7M E Sidney
RouteCounty Highway 42307
CountyRichland County
StateMontana
Coordinates47.69641, -104.09042
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating38 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length98 ft (29.8 m)
Longest span96 ft (29.2 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 307 over Bennie Peer Creek 021 built?

It was built in 1997, making it 28 years old in 2025.

What condition is County Road 307 over Bennie Peer Creek 021 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 2023.

How much traffic does County Road 307 over Bennie Peer Creek 021 carry?

About 100 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is County Road 307 over Bennie Peer Creek 021?

The structure is 98 ft (29.8 m) long with a longest span of 96 ft (29.2 m) and a deck 30 ft wide.

Who owns County Road 307 over Bennie Peer Creek 021?

It is owned by the County Highway Agency.