US Bridges

1st RD S over Mill Coulee Canal 046

Fair

Cascade County, Montana · 9M E Fairfield · Structure no. L07025002+07001

Built
2004
21 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
35 ft
2 main spans
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

1st RD S over Mill Coulee Canal 046 is a steel continuous stringer/multi-beam or girder carrying 1st RD S over Mill Coulee Canal 046 in Cascade County, Montana. It was built in 2004, so it is 21 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 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 35 ft (10.6 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries1st RD S
CrossesMill Coulee Canal 046
Location9M E Fairfield
RouteCounty Highway 7025
CountyCascade County
StateMontana
Coordinates47.59631, -111.8104
Functional classRural Minor Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.7 US tons
Inventory rating24.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckCorrugated steel
Main spans2
Design loadUnknown
Structure length35 ft (10.6 m)
Longest span16 ft (5 m)
Deck width26 ft (7.9 m)
Roadway width25 ft (7.7 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 closed3.7 mi (6 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 1st RD S over Mill Coulee Canal 046 built?

It was built in 2004, making it 21 years old in 2025.

What condition is 1st RD S over Mill Coulee Canal 046 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 January 2025.

How much traffic does 1st RD S over Mill Coulee Canal 046 carry?

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

How long is 1st RD S over Mill Coulee Canal 046?

The structure is 35 ft (10.6 m) long with a longest span of 16 ft (5 m) and a deck 26 ft wide.

Who owns 1st RD S over Mill Coulee Canal 046?

It is owned by the County Highway Agency.