US Bridges

CR 78 over Plum Creek

Fair

Redwood County, Minnesota · 0.9 MI W of JCT Csah 5 · Structure no. 64528

Built
1977
48 years old
Condition
Fair
inspected September 2024
Type
Slab
Wood or Timber
Length
92 ft
3 main spans
Daily traffic
115
2011 count
Owner
County
County Highway Agency

About this bridge

CR 78 over Plum Creek is a wood or timber slab carrying CR 78 over Plum Creek in Redwood County, Minnesota. It was built in 1977, so it is 48 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 115 vehicles a day, projected to reach 115 by 2039. The structure is 92 ft (28 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCR 78
CrossesPlum Creek
Location0.9 MI W of JCT Csah 5
RouteCounty Highway 78
CountyRedwood County
StateMinnesota
Coordinates44.20822, -95.48881
Functional classRural Minor Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no 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 rating59 US tons
Inventory rating41.4 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 20
Structure length92 ft (28 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 traffic115 (2011)
Projected traffic115 by 2039
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

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 78 over Plum Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is CR 78 over Plum Creek 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 September 2024.

How much traffic does CR 78 over Plum Creek carry?

About 115 vehicles per day (2011 count).

How long is CR 78 over Plum Creek?

The structure is 92 ft (28 m) long with a longest span of 32 ft (9.8 m) and a deck 30 ft wide.

Who owns CR 78 over Plum Creek?

It is owned by the County Highway Agency.