US Bridges

Csah 20 over Minnehaha Creek

Fair

Hennepin County, Minnesota · 0.2 MI S of JCT TH 7 · Structure no. 27617

Built
1978
47 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Prestressed Concrete
Length
64 ft
1 main span
Daily traffic
14,500
2014 count
Owner
County
County Highway Agency

About this bridge

Csah 20 over Minnehaha Creek is a prestressed concrete tee beam carrying Csah 20 over Minnehaha Creek in Hennepin County, Minnesota. It was built in 1978, so it is 47 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 14,500 vehicles a day, projected to reach 14,500 by 2034. The structure is 64 ft (19.5 m) long and 90 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCsah 20
CrossesMinnehaha Creek
Location0.2 MI S of JCT TH 7
RouteCounty Highway 20
CountyHennepin County
StateMinnesota
Coordinates44.93213, -93.3857
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.1 US tons
Inventory rating19 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length64 ft (19.5 m)
Longest span63 ft (19.3 m)
Deck width90 ft (27.5 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,500 (2014)
Projected traffic14,500 by 2034
Trucks—
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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 20 over Minnehaha Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Csah 20 over Minnehaha 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 July 2023.

How much traffic does Csah 20 over Minnehaha Creek carry?

About 14,500 vehicles per day (2014 count).

How long is Csah 20 over Minnehaha Creek?

The structure is 64 ft (19.5 m) long with a longest span of 63 ft (19.3 m) and a deck 90 ft wide.

Who owns Csah 20 over Minnehaha Creek?

It is owned by the County Highway Agency.