US Bridges

Csah 34 over Platte River

Fair

Morrison County, Minnesota · 1.7 MI W of JCT Csah 35 · Structure no. 49526

Built
1981
44 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
137 ft
3 main spans
Daily traffic
533
2022 count
Owner
County
County Highway Agency

About this bridge

Csah 34 over Platte River is a prestressed concrete tee beam carrying Csah 34 over Platte River in Morrison County, Minnesota. It was built in 1981, so it is 44 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 533 vehicles a day, roughly 3% of them trucks, projected to reach 520 by 2042. The structure is 137 ft (41.8 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCsah 34
CrossesPlatte River
Location1.7 MI W of JCT Csah 35
RouteCounty Highway 34
CountyMorrison County
StateMinnesota
Coordinates45.89594, -94.27323
Functional classRural Major 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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 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 geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating40 US tons
Inventory rating30.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length137 ft (41.8 m)
Longest span45 ft (13.8 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic533 (2022)
Projected traffic520 by 2042
Trucks3%
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 Csah 34 over Platte River built?

It was built in 1981, making it 44 years old in 2025.

What condition is Csah 34 over Platte 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 November 2023.

How much traffic does Csah 34 over Platte River carry?

About 533 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Csah 34 over Platte River?

The structure is 137 ft (41.8 m) long with a longest span of 45 ft (13.8 m) and a deck 35 ft wide.

Who owns Csah 34 over Platte River?

It is owned by the County Highway Agency.