US Bridges

M 1121 over Minnehaha Creek

FairPosted for load

Hennepin County, Minnesota · 0.2 MI E of Cedar Ave · Structure no. L5736

Built
1923
102 years old
Condition
Fair
inspected September 2023
Type
Girder and Floorbeam System
Concrete
Length
36 ft
1 main span
Daily traffic
6,200
2020 count
Owner
Local
Local Park, Forest, or Reservation Agency

About this bridge

M 1121 over Minnehaha Creek is a concrete girder and floorbeam system carrying M 1121 over Minnehaha Creek in Hennepin County, Minnesota. It was built in 1923, so it is 102 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 6,200 vehicles a day, projected to reach 7,784 by 2040. The structure is 36 ft (11 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesM 1121
CrossesMinnehaha Creek
Location0.2 MI E of Cedar Ave
RouteCity Street 1121
CountyHennepin County
StateMinnesota
Coordinates44.91615, -93.24212
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.
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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.9 US tons
Inventory rating23.4 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length36 ft (11 m)
Longest span32 ft (9.8 m)
Deck width48 ft (14.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,200 (2020)
Projected traffic7,784 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerLocal Park, Forest, or Reservation Agency
Maintained byLocal Park, Forest, or Reservation Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$112 million
NavigationNo navigation control on waterway

Frequently asked questions

When was M 1121 over Minnehaha Creek built?

It was built in 1923, making it 102 years old in 2025.

What condition is M 1121 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 September 2023.

How much traffic does M 1121 over Minnehaha Creek carry?

About 6,200 vehicles per day (2020 count).

How long is M 1121 over Minnehaha Creek?

The structure is 36 ft (11 m) long with a longest span of 32 ft (9.8 m) and a deck 48 ft wide.

Who owns M 1121 over Minnehaha Creek?

It is owned by the Local Park, Forest, or Reservation Agency.