US Bridges

Csah 28 over Middle River

Fair

Marshall County, Minnesota · 0.7 MI E of JCT TH 59 · Structure no. 45508

Built
1964
61 years old
Condition
Fair
inspected October 2023
Type
Channel Beam
Prestressed Concrete
Length
50 ft
2 main spans
Daily traffic
530
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 28 over Middle River is a prestressed concrete channel beam carrying Csah 28 over Middle River in Marshall County, Minnesota. It was built in 1964, so it is 61 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 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 530 vehicles a day, projected to reach 570 by 2038. The structure is 50 ft (15.3 m) long and 31 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesCsah 28
CrossesMiddle River
Location0.7 MI E of JCT TH 59
RouteCounty Highway 28
CountyMarshall County
StateMinnesota
Coordinates48.35706, -96.3109
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.2 US tons
Inventory rating34.4 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadH 20
Structure length50 ft (15.3 m)
Longest span24 ft (7.3 m)
Deck width31 ft (9.6 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic530 (2018)
Projected traffic570 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 28 over Middle River built?

It was built in 1964, making it 61 years old in 2025.

What condition is Csah 28 over Middle 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 2023.

How much traffic does Csah 28 over Middle River carry?

About 530 vehicles per day (2018 count).

How long is Csah 28 over Middle River?

The structure is 50 ft (15.3 m) long with a longest span of 24 ft (7.3 m) and a deck 31 ft wide.

Who owns Csah 28 over Middle River?

It is owned by the County Highway Agency.