US Bridges

Frontage Road 020 over Reservation Creek 036

Fair

Rosebud County, Montana · 12M W Forsyth · Structure no. L44020001+05001

Built
1928
97 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
67 ft
3 main spans
Daily traffic
25
2023 count
Owner
County
County Highway Agency

About this bridge

Frontage Road 020 over Reservation Creek 036 is a steel stringer/multi-beam or girder carrying Frontage Road 020 over Reservation Creek 036 in Rosebud County, Montana. It was built in 1928, so it is 97 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 25 vehicles a day, roughly 3% of them trucks, projected to reach 26 by 2043. The structure is 67 ft (20.4 m) long and 23 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesFrontage Road 020
CrossesReservation Creek 036
Location12M W Forsyth
RouteCounty Highway 44020
CountyRosebud County
StateMontana
Coordinates46.2755, -106.93094
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
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating29 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length67 ft (20.4 m)
Longest span26 ft (7.9 m)
Deck width23 ft (7 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic26 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 Frontage Road 020 over Reservation Creek 036 built?

It was built in 1928, making it 97 years old in 2025.

What condition is Frontage Road 020 over Reservation Creek 036 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 Frontage Road 020 over Reservation Creek 036 carry?

About 25 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Frontage Road 020 over Reservation Creek 036?

The structure is 67 ft (20.4 m) long with a longest span of 26 ft (7.9 m) and a deck 23 ft wide.

Who owns Frontage Road 020 over Reservation Creek 036?

It is owned by the County Highway Agency.