US Bridges

CR 146 over CO Ditch # 18

Poor

Norman County, Minnesota · 0.5 MI S of JCT Csah 13 · Structure no. 92481

Built
1966
59 years old
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
35 ft
1 main span
Daily traffic
30
2021 count
Owner
County
County Highway Agency

About this bridge

CR 146 over CO Ditch # 18 is a steel stringer/multi-beam or girder carrying CR 146 over CO Ditch # 18 in Norman County, Minnesota. It was built in 1966, so it is 59 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 30 vehicles a day, projected to reach 20 by 2041. The structure is 35 ft (10.8 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesCR 146
CrossesCO Ditch # 18
Location0.5 MI S of JCT Csah 13
RouteCounty Highway 146
CountyNorman County
StateMinnesota
Coordinates47.40501, -96.45181
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.8 US tons
Inventory rating30.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length35 ft (10.8 m)
Longest span33 ft (10.1 m)
Deck width30 ft (9.2 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2021)
Projected traffic20 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 CR 146 over CO Ditch # 18 built?

It was built in 1966, making it 59 years old in 2025.

What condition is CR 146 over CO Ditch # 18 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does CR 146 over CO Ditch # 18 carry?

About 30 vehicles per day (2021 count).

How long is CR 146 over CO Ditch # 18?

The structure is 35 ft (10.8 m) long with a longest span of 33 ft (10.1 m) and a deck 30 ft wide.

Who owns CR 146 over CO Ditch # 18?

It is owned by the County Highway Agency.