US Bridges

M 1121 over Minnehaha Creek

FairPosted for load

Hennepin County, Minnesota · 0.1 MI E of Portland Ave · Structure no. L5765

Built
1925
100 years old
Condition
Fair
inspected July 2024
Type
Girder and Floorbeam System
Concrete
Length
45 ft
1 main span
Daily traffic
5,000
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 1925, so it is 100 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. Its operating status is: posted for load restriction.

It carries about 5,000 vehicles a day, projected to reach 6,556 by 2040. The structure is 45 ft (13.7 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesM 1121
CrossesMinnehaha Creek
Location0.1 MI E of Portland Ave
RouteCity Street 1121
CountyHennepin County
StateMinnesota
Coordinates44.91245, -93.26666
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating28.8 US tons
Inventory rating17.3 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length45 ft (13.7 m)
Longest span42 ft (12.7 m)
Deck width47 ft (14.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2020)
Projected traffic6,556 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$97 million
NavigationNo navigation control on waterway

Frequently asked questions

When was M 1121 over Minnehaha Creek built?

It was built in 1925, making it 100 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 July 2024.

How much traffic does M 1121 over Minnehaha Creek carry?

About 5,000 vehicles per day (2020 count).

How long is M 1121 over Minnehaha Creek?

The structure is 45 ft (13.7 m) long with a longest span of 42 ft (12.7 m) and a deck 47 ft wide.

Who owns M 1121 over Minnehaha Creek?

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