US Bridges

Straw RD over West Buffalo Creek 042

Good

Judith Basin County, Montana · 11M SE Hobson · Structure no. L23003004+08001

Built
2014
11 years old
Condition
Good
inspected June 2024
Type
Slab
Prestressed Concrete
Length
23 ft
1 main span
Daily traffic
10
2023 count
Owner
County
County Highway Agency

About this bridge

Straw RD over West Buffalo Creek 042 is a prestressed concrete slab carrying Straw RD over West Buffalo Creek 042 in Judith Basin County, Montana. It was built in 2014, so it is 11 years old, younger than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 10 vehicles a day, roughly 3% of them trucks, projected to reach 11 by 2043. The structure is 23 ft (6.9 m) long and 25 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesStraw RD
CrossesWest Buffalo Creek 042
Location11M SE Hobson
RouteCounty Highway 4
StateMontana
Coordinates46.85269, -109.80037
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 alignment7: Better than present minimum criteria
Operating rating49.1 US tons
Inventory rating38 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length23 ft (6.9 m)
Longest span21 ft (6.4 m)
Deck width25 ft (7.6 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2023)
Projected traffic11 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Straw RD over West Buffalo Creek 042 built?

It was built in 2014, making it 11 years old in 2025.

What condition is Straw RD over West Buffalo Creek 042 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does Straw RD over West Buffalo Creek 042 carry?

About 10 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Straw RD over West Buffalo Creek 042?

The structure is 23 ft (6.9 m) long with a longest span of 21 ft (6.4 m) and a deck 25 ft wide.

Who owns Straw RD over West Buffalo Creek 042?

It is owned by the County Highway Agency.