US Bridges

Conlin RD over Emigrant Creek 075

Fair

Park County, Montana · 3M SE Emmigrant · Structure no. L34211002+06001

Built
2008
17 years old
Condition
Fair
inspected September 2024
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
25 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Conlin RD over Emigrant Creek 075 is a aluminum, wrought iron, or cast iron culvert carrying Conlin RD over Emigrant Creek 075 in Park County, Montana. It was built in 2008, so it is 17 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 25 ft (7.5 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesConlin RD
CrossesEmigrant Creek 075
Location3M SE Emmigrant
RouteCounty Highway 34211
CountyPark County
StateMontana
Coordinates45.32069, -110.70926
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadUnknown
Structure length25 ft (7.5 m)
Longest span25 ft (7.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$27,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Conlin RD over Emigrant Creek 075 built?

It was built in 2008, making it 17 years old in 2025.

What condition is Conlin RD over Emigrant Creek 075 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 September 2024.

How much traffic does Conlin RD over Emigrant Creek 075 carry?

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

How long is Conlin RD over Emigrant Creek 075?

The structure is 25 ft (7.5 m) long with a longest span of 25 ft (7.5 m).

Who owns Conlin RD over Emigrant Creek 075?

It is owned by the County Highway Agency.