US Bridges

T 237 over CO Ditch # 21

Fair

Marshall County, Minnesota · 1.1 MI S of JCT CR 103 · Structure no. L9555

Built
1975
50 years old
Condition
Fair
inspected October 2023
Type
Slab
Wood or Timber
Length
23 ft
1 main span
Daily traffic
31
1994 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T 237 over CO Ditch # 21 is a wood or timber slab carrying T 237 over CO Ditch # 21 in Marshall County, Minnesota. It was built in 1975, so it is 50 years old, older than the Minnesota average of 38.5 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 31 vehicles a day, projected to reach 31 by 2029. The structure is 23 ft (7 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesT 237
CrossesCO Ditch # 21
Location1.1 MI S of JCT CR 103
RouteCounty Highway 237
CountyMarshall County
StateMinnesota
Coordinates48.22396, -96.9127
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.2 US tons
Inventory rating53.2 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span22 ft (6.7 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31 (1994)
Projected traffic31 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

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$59 million
NavigationNo navigation control on waterway

Frequently asked questions

When was T 237 over CO Ditch # 21 built?

It was built in 1975, making it 50 years old in 2025.

What condition is T 237 over CO Ditch # 21 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 October 2023.

How much traffic does T 237 over CO Ditch # 21 carry?

About 31 vehicles per day (1994 count).

How long is T 237 over CO Ditch # 21?

The structure is 23 ft (7 m) long with a longest span of 22 ft (6.7 m) and a deck 30 ft wide.

Who owns T 237 over CO Ditch # 21?

It is owned by the Town or Township Highway Agency.