US Bridges

T 407 over CO Ditch # 7

Fair

Polk County, Minnesota · 0.4 MI S of NW Cor. Sec · Structure no. 60513

Built
1967
58 years old
Condition
Fair
inspected October 2023
Type
Channel Beam
Prestressed Concrete
Length
94 ft
3 main spans
Daily traffic
68
1973 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T 407 over CO Ditch # 7 is a prestressed concrete channel beam carrying T 407 over CO Ditch # 7 in Polk County, Minnesota. It was built in 1967, so it is 58 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 68 vehicles a day, projected to reach 68 by 2029. The structure is 94 ft (28.5 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesT 407
CrossesCO Ditch # 7
Location0.4 MI S of NW Cor. Sec
RouteCounty Highway 407
CountyPolk County
StateMinnesota
Coordinates48.13169, -96.84688
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 alignment7: Better than present minimum criteria
Operating rating57.5 US tons
Inventory rating34.6 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length94 ft (28.5 m)
Longest span31 ft (9.5 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic68 (1973)
Projected traffic68 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was T 407 over CO Ditch # 7 built?

It was built in 1967, making it 58 years old in 2025.

What condition is T 407 over CO Ditch # 7 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 407 over CO Ditch # 7 carry?

About 68 vehicles per day (1973 count).

How long is T 407 over CO Ditch # 7?

The structure is 94 ft (28.5 m) long with a longest span of 31 ft (9.5 m) and a deck 32 ft wide.

Who owns T 407 over CO Ditch # 7?

It is owned by the Town or Township Highway Agency.