US Bridges

S Valley RD S-509 over Odell Creek

Good

Beaverhead County, Montana · 29M E Monida · Structure no. 000000000007031

Built
2002
23 years old
Condition
Good
inspected June 2024
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
59
2023 count
Owner
County
County Highway Agency

About this bridge

S Valley RD S-509 over Odell Creek is a concrete slab carrying S Valley RD S-509 over Odell Creek in Beaverhead County, Montana. It was built in 2002, so it is 23 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 59 vehicles a day, roughly 2% of them trucks, projected to reach 62 by 2043. The structure is 28 ft (8.5 m) long and 25 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

CarriesS Valley RD S-509
CrossesOdell Creek
Location29M E Monida
RouteCounty Highway 509
StateMontana
Coordinates44.59256, -111.78864
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length28 ft (8.5 m)
Longest span27 ft (8.1 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic59 (2023)
Projected traffic62 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 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 Valley RD S-509 over Odell Creek built?

It was built in 2002, making it 23 years old in 2025.

What condition is S Valley RD S-509 over Odell Creek 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 June 2024.

How much traffic does S Valley RD S-509 over Odell Creek carry?

About 59 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is S Valley RD S-509 over Odell Creek?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.1 m) and a deck 25 ft wide.

Who owns S Valley RD S-509 over Odell Creek?

It is owned by the County Highway Agency.