US Bridges

W Dry Creek RD over Baker Creek

Poor

Gallatin County, Montana · 1M E Manhattan · Structure no. S00346002+03611

Built
1967
58 years old
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
101 ft
2 main spans
Daily traffic
1,287
2023 count
Owner
State
State Highway Agency

About this bridge

W Dry Creek RD over Baker Creek is a prestressed concrete stringer/multi-beam or girder carrying W Dry Creek RD over Baker Creek in Gallatin County, Montana. It was built in 1967, so it is 58 years old, older than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,287 vehicles a day, roughly 1% of them trucks, projected to reach 1,396 by 2043. The structure is 101 ft (30.9 m) long and 35 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesW Dry Creek RD
CrossesBaker Creek
Location1M E Manhattan
RouteState Highway 346
StateMontana
Coordinates45.86028, -111.29864
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating46 US tons
Inventory rating28 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 15
Structure length101 ft (30.9 m)
Longest span50 ft (15.2 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,287 (2023)
Projected traffic1,396 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 W Dry Creek RD over Baker Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is W Dry Creek RD over Baker Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does W Dry Creek RD over Baker Creek carry?

About 1,287 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is W Dry Creek RD over Baker Creek?

The structure is 101 ft (30.9 m) long with a longest span of 50 ft (15.2 m) and a deck 35 ft wide.

Who owns W Dry Creek RD over Baker Creek?

It is owned by the State Highway Agency.