US Bridges

CR 79 over Long Prairie River

FairPosted for load

Todd County, Minnesota · 1.0 MI S of JCT CR 63 · Structure no. 77510

Built
1975
50 years old
Condition
Fair
inspected October 2024
Type
Slab
Wood or Timber
Length
136 ft
5 main spans
Daily traffic
250
2020 count
Owner
County
County Highway Agency

About this bridge

CR 79 over Long Prairie River is a wood or timber slab carrying CR 79 over Long Prairie River in Todd 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. Its operating status is: posted for load restriction.

It carries about 250 vehicles a day, projected to reach 245 by 2040. The structure is 136 ft (41.5 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCR 79
CrossesLong Prairie River
Location1.0 MI S of JCT CR 63
RouteCounty Highway 79
CountyTodd County
StateMinnesota
Coordinates46.12386, -94.84265
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating47.3 US tons
Inventory rating32 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans5
Design loadHS 20
Structure length136 ft (41.5 m)
Longest span32 ft (9.8 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2020)
Projected traffic245 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 CR 79 over Long Prairie River built?

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

What condition is CR 79 over Long Prairie River 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 79 over Long Prairie River carry?

About 250 vehicles per day (2020 count).

How long is CR 79 over Long Prairie River?

The structure is 136 ft (41.5 m) long with a longest span of 32 ft (9.8 m) and a deck 30 ft wide.

Who owns CR 79 over Long Prairie River?

It is owned by the County Highway Agency.