US Bridges

Webster RD over N Fk Coal Bank Creek 004

Good

Fallon County, Montana · 14M SE Webster · Structure no. 000000000002702

Built
2017
8 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Webster RD over N Fk Coal Bank Creek 004 is a concrete culvert carrying Webster RD over N Fk Coal Bank Creek 004 in Fallon County, Montana. It was built in 2017, so it is 8 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 21.7 mi (35 km).

CarriesWebster RD
CrossesN Fk Coal Bank Creek 004
Location14M SE Webster
RouteCounty Highway 13126
StateMontana
Coordinates45.94336, -104.09331
Functional classRural Minor 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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating85 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 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 closed21.7 mi (35 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$125,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Webster RD over N Fk Coal Bank Creek 004 built?

It was built in 2017, making it 8 years old in 2025.

What condition is Webster RD over N Fk Coal Bank Creek 004 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 October 2023.

How much traffic does Webster RD over N Fk Coal Bank Creek 004 carry?

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

How long is Webster RD over N Fk Coal Bank Creek 004?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).

Who owns Webster RD over N Fk Coal Bank Creek 004?

It is owned by the County Highway Agency.