US Bridges

Mormon Ave over Russell Creek 035

Fair

Carter County, Montana · Ekalaka-Mormon Ave · Structure no. M06038000+00201

Built
1940
85 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
57 ft
3 main spans
Daily traffic
480
2023 count
Owner
County
County Highway Agency

About this bridge

Mormon Ave over Russell Creek 035 is a wood or timber stringer/multi-beam or girder carrying Mormon Ave over Russell Creek 035 in Carter County, Montana. It was built in 1940, so it is 85 years old, older 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 480 vehicles a day, roughly 2% of them trucks, projected to reach 504 by 2043. The structure is 57 ft (17.5 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMormon Ave
CrossesRussell Creek 035
LocationEkalaka-Mormon Ave
RouteCity Street 6038
CountyCarter County
StateMontana
Coordinates45.89227, -104.54519
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50.7 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 15
Structure length57 ft (17.5 m)
Longest span19 ft (5.8 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic480 (2023)
Projected traffic504 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Mormon Ave over Russell Creek 035 built?

It was built in 1940, making it 85 years old in 2025.

What condition is Mormon Ave over Russell Creek 035 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 August 2023.

How much traffic does Mormon Ave over Russell Creek 035 carry?

About 480 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Mormon Ave over Russell Creek 035?

The structure is 57 ft (17.5 m) long with a longest span of 19 ft (5.8 m) and a deck 33 ft wide.

Who owns Mormon Ave over Russell Creek 035?

It is owned by the County Highway Agency.