US Bridges

Mn 1 over Mud River (dam)

Good

Beltrami County, Minnesota · 0.5 MI E of Redby · Structure no. 04028

Built
2013
12 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
54 ft
1 main span
Daily traffic
3,000
2018 count
Owner
State
State Highway Agency

About this bridge

Mn 1 over Mud River (dam) is a prestressed concrete stringer/multi-beam or girder carrying Mn 1 over Mud River (dam) in Beltrami County, Minnesota. It was built in 2013, so it is 12 years old, younger than the Minnesota average of 38.5 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 3,000 vehicles a day, roughly 11% of them trucks, projected to reach 2,950 by 2038. The structure is 54 ft (16.6 m) long and 49 ft wide. If it were closed, the detour would be 65.2 mi (105 km).

CarriesMn 1
CrossesMud River (dam)
Location0.5 MI E of Redby
RouteState Highway 1
Coordinates47.88109, -94.90428
Functional classRural Minor Arterial

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.7 US tons
Inventory rating41.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length54 ft (16.6 m)
Longest span51 ft (15.5 m)
Deck width49 ft (14.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2018)
Projected traffic2,950 by 2038
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed65.2 mi (105 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 Mn 1 over Mud River (dam) built?

It was built in 2013, making it 12 years old in 2025.

What condition is Mn 1 over Mud River (dam) 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 May 2024.

How much traffic does Mn 1 over Mud River (dam) carry?

About 3,000 vehicles per day (2018 count), of which roughly 11% are trucks.

How long is Mn 1 over Mud River (dam)?

The structure is 54 ft (16.6 m) long with a longest span of 51 ft (15.5 m) and a deck 49 ft wide.

Who owns Mn 1 over Mud River (dam)?

It is owned by the State Highway Agency.