US Bridges

Silver Bow RD over Silver Bow Creek 014

Fair

Silver Bow County, Montana · 3M W Rocker · Structure no. L47001000+02001

Built
2006
19 years old
Condition
Fair
inspected February 2023
Type
Tee Beam
Prestressed Concrete
Length
80 ft
1 main span
Daily traffic
102
2023 count
Owner
County
County Highway Agency

About this bridge

Silver Bow RD over Silver Bow Creek 014 is a prestressed concrete tee beam carrying Silver Bow RD over Silver Bow Creek 014 in Silver Bow County, Montana. It was built in 2006, so it is 19 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 5 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 102 vehicles a day, roughly 3% of them trucks, projected to reach 109 by 2043. The structure is 80 ft (24.4 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesSilver Bow RD
CrossesSilver Bow Creek 014
Location3M W Rocker
RouteCounty Highway 47001
StateMontana
Coordinates46.00507, -112.66186
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length80 ft (24.4 m)
Longest span80 ft (24.4 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic102 (2023)
Projected traffic109 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$117,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Silver Bow RD over Silver Bow Creek 014 built?

It was built in 2006, making it 19 years old in 2025.

What condition is Silver Bow RD over Silver Bow Creek 014 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 February 2023.

How much traffic does Silver Bow RD over Silver Bow Creek 014 carry?

About 102 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Silver Bow RD over Silver Bow Creek 014?

The structure is 80 ft (24.4 m) long with a longest span of 80 ft (24.4 m) and a deck 24 ft wide.

Who owns Silver Bow RD over Silver Bow Creek 014?

It is owned by the County Highway Agency.