US Bridges

Msas 121 over Duck Lake

Good

Hennepin County, Minnesota · 1.0 MI S of JCT CR 62 · Structure no. 27C71

Built
2022
3 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete Continuous
Length
237 ft
5 main spans
Daily traffic
1,250
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Msas 121 over Duck Lake is a concrete continuous slab carrying Msas 121 over Duck Lake in Hennepin County, Minnesota. It was built in 2022, so it is 3 years old, younger than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,250 vehicles a day, projected to reach 1,750 by 2041. The structure is 237 ft (72.1 m) long and 47 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMsas 121
CrossesDuck Lake
Location1.0 MI S of JCT CR 62
RouteCity Street 121
Coordinates44.8775, -93.49568
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating42.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHL 93
Structure length237 ft (72.1 m)
Longest span51 ft (15.5 m)
Deck width47 ft (14.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,250 (2021)
Projected traffic1,750 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Msas 121 over Duck Lake built?

It was built in 2022, making it 3 years old in 2025.

What condition is Msas 121 over Duck Lake in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does Msas 121 over Duck Lake carry?

About 1,250 vehicles per day (2021 count).

How long is Msas 121 over Duck Lake?

The structure is 237 ft (72.1 m) long with a longest span of 51 ft (15.5 m) and a deck 47 ft wide.

Who owns Msas 121 over Duck Lake?

It is owned by the City or Municipal Highway Agency.