US Bridges

Lower RD over Coyote Creek 085

Fair

Fergus County, Montana · 1M SW Denton · Structure no. L14310000+07001

Built
1977
48 years old, rebuilt 2011
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
31 ft
2 main spans
Daily traffic
73
2023 count
Owner
County
County Highway Agency

About this bridge

Lower RD over Coyote Creek 085 is a wood or timber stringer/multi-beam or girder carrying Lower RD over Coyote Creek 085 in Fergus County, Montana. It was built in 1977 and reconstructed in 2011, so it is 48 years old, older than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 73 vehicles a day, roughly 3% of them trucks, projected to reach 77 by 2043. The structure is 31 ft (9.5 m) long and 20 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesLower RD
CrossesCoyote Creek 085
Location1M SW Denton
RouteCounty Highway 14310
CountyFergus County
StateMontana
Coordinates47.31282, -109.97264
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.8 US tons
Inventory rating52.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckCorrugated steel
Main spans2
Design loadUnknown
Structure length31 ft (9.5 m)
Longest span15 ft (4.5 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic73 (2023)
Projected traffic77 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Lower RD over Coyote Creek 085 built?

It was built in 1977, making it 48 years old in 2025. It was reconstructed in 2011.

What condition is Lower RD over Coyote Creek 085 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.

How much traffic does Lower RD over Coyote Creek 085 carry?

About 73 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Lower RD over Coyote Creek 085?

The structure is 31 ft (9.5 m) long with a longest span of 15 ft (4.5 m) and a deck 20 ft wide.

Who owns Lower RD over Coyote Creek 085?

It is owned by the County Highway Agency.