US Bridges

S 325-ELLOAM RD over Fort Belknap Canal

Good

Blaine County, Montana · 1M NE Chinook · Structure no. S00325000+08001

Built
2012
13 years old
Condition
Good
inspected January 2025
Type
Culvert
Steel
Length
37 ft
1 main span
Daily traffic
214
2023 count
Owner
County
County Highway Agency

About this bridge

S 325-ELLOAM RD over Fort Belknap Canal is a steel culvert carrying S 325-ELLOAM RD over Fort Belknap Canal in Blaine County, Montana. It was built in 2012, so it is 13 years old, younger than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 214 vehicles a day, roughly 8% of them trucks, projected to reach 225 by 2043. The structure is 37 ft (11.3 m) long. If it were closed, the detour would be 123.7 mi (199 km).

CarriesS 325-ELLOAM RD
CrossesFort Belknap Canal
Location1M NE Chinook
RouteCounty Highway 325
StateMontana
Coordinates48.60106, -109.19718
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating46.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHL 93
Structure length37 ft (11.3 m)
Longest span37 ft (11.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic214 (2023)
Projected traffic225 by 2043
Trucks8%
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 S 325-ELLOAM RD over Fort Belknap Canal built?

It was built in 2012, making it 13 years old in 2025.

What condition is S 325-ELLOAM RD over Fort Belknap Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2025.

How much traffic does S 325-ELLOAM RD over Fort Belknap Canal carry?

About 214 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is S 325-ELLOAM RD over Fort Belknap Canal?

The structure is 37 ft (11.3 m) long with a longest span of 37 ft (11.3 m).

Who owns S 325-ELLOAM RD over Fort Belknap Canal?

It is owned by the County Highway Agency.