US Bridges

Mn 87 over Otter Tail River

Good

Becker County, Minnesota · 1.3 MI E of JCT TH 10 · Structure no. 03013

Built
2021
4 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
83 ft
1 main span
Daily traffic
2,842
2021 count
Owner
State
State Highway Agency

About this bridge

Mn 87 over Otter Tail River is a prestressed concrete stringer/multi-beam or girder carrying Mn 87 over Otter Tail River in Becker County, Minnesota. It was built in 2021, so it is 4 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,842 vehicles a day, roughly 7% of them trucks, projected to reach 3,520 by 2041. The structure is 83 ft (25.3 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMn 87
CrossesOtter Tail River
Location1.3 MI E of JCT TH 10
RouteState Highway 87
Coordinates46.73043, -95.69486
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating56.8 US tons
Inventory rating40.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length83 ft (25.3 m)
Longest span81 ft (24.6 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,842 (2021)
Projected traffic3,520 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 87 over Otter Tail River built?

It was built in 2021, making it 4 years old in 2025.

What condition is Mn 87 over Otter Tail River 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 October 2023.

How much traffic does Mn 87 over Otter Tail River carry?

About 2,842 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is Mn 87 over Otter Tail River?

The structure is 83 ft (25.3 m) long with a longest span of 81 ft (24.6 m) and a deck 47 ft wide.

Who owns Mn 87 over Otter Tail River?

It is owned by the State Highway Agency.