US Bridges

Elk Creek RD over Elk Creek 051

Fair

Sanders County, Montana · 4M S Heron · Structure no. L45031000+03001

Built
1988
37 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
27 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Elk Creek RD over Elk Creek 051 is a steel stringer/multi-beam or girder carrying Elk Creek RD over Elk Creek 051 in Sanders County, Montana. It was built in 1988, so it is 37 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 27 ft (8.2 m) long and 22 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesElk Creek RD
CrossesElk Creek 051
Location4M S Heron
RouteCounty Highway 45031
StateMontana
Coordinates48.0085, -115.99194
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating81 US tons
Inventory rating61.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span27 ft (8.2 m)
Deck width22 ft (6.7 m)
Roadway width21 ft (6.3 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 closed123.7 mi (199 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 Elk Creek RD over Elk Creek 051 built?

It was built in 1988, making it 37 years old in 2025.

What condition is Elk Creek RD over Elk Creek 051 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 June 2024.

How much traffic does Elk Creek RD over Elk Creek 051 carry?

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

How long is Elk Creek RD over Elk Creek 051?

The structure is 27 ft (8.2 m) long with a longest span of 27 ft (8.2 m) and a deck 22 ft wide.

Who owns Elk Creek RD over Elk Creek 051?

It is owned by the County Highway Agency.