US Bridges

T 91 over Doran Slough

Good

Wilkin County, Minnesota · 0.7 MI S of JCT Csah 8 · Structure no. 84J48

Built
2000
25 years old
Condition
Good
inspected October 2021
Type
Culvert
Concrete
Length
31 ft
3 main spans
Daily traffic
5
2000 count
Owner
County
County Highway Agency

About this bridge

T 91 over Doran Slough is a concrete culvert carrying T 91 over Doran Slough in Wilkin County, Minnesota. It was built in 2000, so it is 25 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 5 vehicles a day, projected to reach 5 by 2029. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesT 91
CrossesDoran Slough
Location0.7 MI S of JCT Csah 8
RouteCounty Highway 91
Coordinates46.17199, -96.43
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionOctober 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating39.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span8 ft (2.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2000)
Projected traffic5 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 T 91 over Doran Slough built?

It was built in 2000, making it 25 years old in 2025.

What condition is T 91 over Doran Slough 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 2021.

How much traffic does T 91 over Doran Slough carry?

About 5 vehicles per day (2000 count).

How long is T 91 over Doran Slough?

The structure is 31 ft (9.4 m) long with a longest span of 8 ft (2.3 m).

Who owns T 91 over Doran Slough?

It is owned by the County Highway Agency.