US Bridges

Marsh RD over Sand Creek

Good

Dawson County, Montana · 5M S Glendive · Structure no. S00335005+08631

Built
1966
59 years old
Condition
Good
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
101 ft
2 main spans
Daily traffic
94
2023 count
Owner
State
State Highway Agency

About this bridge

Marsh RD over Sand Creek is a prestressed concrete stringer/multi-beam or girder carrying Marsh RD over Sand Creek in Dawson County, Montana. It was built in 1966, so it is 59 years old, older than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 94 vehicles a day, roughly 2% of them trucks, projected to reach 99 by 2043. The structure is 101 ft (30.9 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesMarsh RD
CrossesSand Creek
Location5M S Glendive
RouteState Highway 335
StateMontana
Coordinates47.02469, -104.74128
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length101 ft (30.9 m)
Longest span50 ft (15.2 m)
Deck width35 ft (10.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic94 (2023)
Projected traffic99 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Marsh RD over Sand Creek built?

It was built in 1966, making it 59 years old in 2025.

What condition is Marsh RD over Sand Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.

How much traffic does Marsh RD over Sand Creek carry?

About 94 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Marsh RD over Sand Creek?

The structure is 101 ft (30.9 m) long with a longest span of 50 ft (15.2 m) and a deck 35 ft wide.

Who owns Marsh RD over Sand Creek?

It is owned by the State Highway Agency.