US Bridges

Sunset Hill RD over Elk Creek 089

Good

Missoula County, Montana · 6M S Clearwater JCT · Structure no. L32406006+03001

Built
1992
33 years old
Condition
Good
inspected September 2023
Type
Slab
Wood or Timber
Length
24 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Sunset Hill RD over Elk Creek 089 is a wood or timber slab carrying Sunset Hill RD over Elk Creek 089 in Missoula County, Montana. It was built in 1992, so it is 33 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 24 ft (7.3 m) long and 29 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesSunset Hill RD
CrossesElk Creek 089
Location6M S Clearwater JCT
RouteCounty Highway 32406
StateMontana
Coordinates46.92048, -113.40801
Functional classRural Local

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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.9 US tons
Inventory rating28.5 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span23 ft (7 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 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 Sunset Hill RD over Elk Creek 089 built?

It was built in 1992, making it 33 years old in 2025.

What condition is Sunset Hill RD over Elk Creek 089 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 September 2023.

How much traffic does Sunset Hill RD over Elk Creek 089 carry?

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

How long is Sunset Hill RD over Elk Creek 089?

The structure is 24 ft (7.3 m) long with a longest span of 23 ft (7 m) and a deck 29 ft wide.

Who owns Sunset Hill RD over Elk Creek 089?

It is owned by the County Highway Agency.