US Bridges

M 1121 over Minnehaha Creek

Fair

Hennepin County, Minnesota · 0.1 MI W of Portland Ave · Structure no. L8882

Built
1936
89 years old
Condition
Fair
inspected September 2023
Type
Frame
Concrete
Length
37 ft
1 main span
Daily traffic
5,000
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

M 1121 over Minnehaha Creek is a concrete frame carrying M 1121 over Minnehaha Creek in Hennepin County, Minnesota. It was built in 1936, so it is 89 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 5,000 vehicles a day, projected to reach 6,775 by 2040. The structure is 37 ft (11.3 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesM 1121
CrossesMinnehaha Creek
Location0.1 MI W of Portland Ave
RouteCity Street 1121
Coordinates44.91235, -93.26969
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating33.8 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length37 ft (11.3 m)
Longest span32 ft (9.8 m)
Deck width48 ft (14.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2020)
Projected traffic6,775 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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was M 1121 over Minnehaha Creek built?

It was built in 1936, making it 89 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 5,000 vehicles per day (2020 count).

How long is M 1121 over Minnehaha Creek?

The structure is 37 ft (11.3 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 City or Municipal Highway Agency.