US Bridges

CR 74 over Morrison Brook

Fair

Aitkin County, Minnesota · 1.0 MI W of JCT TH 169 · Structure no. 01J01

Built
1994
31 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
306
2021 count
Owner
County
County Highway Agency

About this bridge

CR 74 over Morrison Brook is a concrete culvert carrying CR 74 over Morrison Brook in Aitkin County, Minnesota. It was built in 1994, so it is 31 years old, younger 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 6 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 306 vehicles a day, projected to reach 240 by 2041. The structure is 26 ft (8 m) long. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCR 74
CrossesMorrison Brook
Location1.0 MI W of JCT TH 169
RouteCounty Highway 74
CountyAitkin County
StateMinnesota
Coordinates46.99387, -93.61858
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (8 m)
Longest span13 ft (4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic306 (2021)
Projected traffic240 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$1,000
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 74 over Morrison Brook built?

It was built in 1994, making it 31 years old in 2025.

What condition is CR 74 over Morrison Brook 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 2024.

How much traffic does CR 74 over Morrison Brook carry?

About 306 vehicles per day (2021 count).

How long is CR 74 over Morrison Brook?

The structure is 26 ft (8 m) long with a longest span of 13 ft (4 m).

Who owns CR 74 over Morrison Brook?

It is owned by the County Highway Agency.