US Bridges

Nnn RD over Mcginnis Creek 004

FairPosted for load

Rosebud County, Montana · 13M N Ingomar · Structure no. L44116001+03001

Built
1986
39 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
38 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Nnn RD over Mcginnis Creek 004 is a steel stringer/multi-beam or girder carrying Nnn RD over Mcginnis Creek 004 in Rosebud County, Montana. It was built in 1986, so it is 39 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. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 38 ft (11.6 m) long and 16 ft wide. If it were closed, the detour would be 47.2 mi (76 km).

Location

Open in Google Maps
CarriesNnn RD
CrossesMcginnis Creek 004
Location13M N Ingomar
RouteCounty Highway 44116
CountyRosebud County
StateMontana
Coordinates46.77548, -107.35178
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating5 US tons
Inventory rating5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length38 ft (11.6 m)
Longest span35 ft (10.7 m)
Deck width16 ft (5 m)
Roadway width15 ft (4.6 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 closed47.2 mi (76 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$117,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Nnn RD over Mcginnis Creek 004 built?

It was built in 1986, making it 39 years old in 2025.

What condition is Nnn RD over Mcginnis Creek 004 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 Nnn RD over Mcginnis Creek 004 carry?

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

How long is Nnn RD over Mcginnis Creek 004?

The structure is 38 ft (11.6 m) long with a longest span of 35 ft (10.7 m) and a deck 16 ft wide.

Who owns Nnn RD over Mcginnis Creek 004?

It is owned by the County Highway Agency.