US Bridges

N Denton RD over Coffee Creek 081

Fair

Fergus County, Montana · 6M N Denton · Structure no. L14003005+00001

Built
1979
46 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

N Denton RD over Coffee Creek 081 is a steel stringer/multi-beam or girder carrying N Denton RD over Coffee Creek 081 in Fergus County, Montana. It was built in 1979, so it is 46 years old, younger 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 40 ft (12.2 m) long and 20 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesN Denton RD
CrossesCoffee Creek 081
Location6M N Denton
RouteCounty Highway 14003
CountyFergus County
StateMontana
Coordinates47.40342, -109.96204
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating25 US tons
Inventory rating18 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span38 ft (11.6 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.7 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 closed24.9 mi (40 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$149,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N Denton RD over Coffee Creek 081 built?

It was built in 1979, making it 46 years old in 2025.

What condition is N Denton RD over Coffee Creek 081 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 2024.

How much traffic does N Denton RD over Coffee Creek 081 carry?

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

How long is N Denton RD over Coffee Creek 081?

The structure is 40 ft (12.2 m) long with a longest span of 38 ft (11.6 m) and a deck 20 ft wide.

Who owns N Denton RD over Coffee Creek 081?

It is owned by the County Highway Agency.