US Bridges

Elk Creek RD over Elk Creek 113

Good

Missoula County, Montana · 12M S Clearwater JCT · Structure no. L32406012+01001

Built
2005
20 years old
Condition
Good
inspected September 2023
Type
Slab
Prestressed Concrete
Length
28 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Elk Creek RD over Elk Creek 113 is a prestressed concrete slab carrying Elk Creek RD over Elk Creek 113 in Missoula County, Montana. It was built in 2005, so it is 20 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 28 ft (8.5 m) long and 18 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesElk Creek RD
CrossesElk Creek 113
Location12M S Clearwater JCT
RouteCounty Highway 406
StateMontana
Coordinates46.86261, -113.35406
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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30.8 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span26 ft (7.9 m)
Deck width18 ft (5.6 m)
Roadway width16 ft (4.9 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 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 Elk Creek RD over Elk Creek 113 built?

It was built in 2005, making it 20 years old in 2025.

What condition is Elk Creek RD over Elk Creek 113 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 Elk Creek RD over Elk Creek 113 carry?

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

How long is Elk Creek RD over Elk Creek 113?

The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 18 ft wide.

Who owns Elk Creek RD over Elk Creek 113?

It is owned by the County Highway Agency.