US Bridges

N Fork RD over Deep Creek 008

Good

Broadwater County, Montana · 10M E Townsend · Structure no. L04003011+06001

Built
2015
10 years old
Condition
Good
inspected October 2023
Type
Slab
Prestressed Concrete
Length
51 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

N Fork RD over Deep Creek 008 is a prestressed concrete slab carrying N Fork RD over Deep Creek 008 in Broadwater County, Montana. It was built in 2015, so it is 10 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 51 ft (15.5 m) long and 32 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesN Fork RD
CrossesDeep Creek 008
Location10M E Townsend
RouteCounty Highway 4005
StateMontana
Coordinates46.32505, -111.28298
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47 US tons
Inventory rating31 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length51 ft (15.5 m)
Longest span48 ft (14.6 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.9 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 closed13 mi (21 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 N Fork RD over Deep Creek 008 built?

It was built in 2015, making it 10 years old in 2025.

What condition is N Fork RD over Deep Creek 008 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 N Fork RD over Deep Creek 008 carry?

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

How long is N Fork RD over Deep Creek 008?

The structure is 51 ft (15.5 m) long with a longest span of 48 ft (14.6 m) and a deck 32 ft wide.

Who owns N Fork RD over Deep Creek 008?

It is owned by the County Highway Agency.