US Bridges

M 488 over Minnehaha Creek

Fair

Hennepin County, Minnesota · 0.4 MI E of JCT TH 100 · Structure no. 92643

Built
1902
123 years old
Condition
Fair
inspected October 2023
Type
Arch - Deck
Concrete
Length
31 ft
1 main span
Daily traffic
3,000
1993 count
Owner
City
City or Municipal Highway Agency

About this bridge

M 488 over Minnehaha Creek is a concrete arch - deck carrying M 488 over Minnehaha Creek in Hennepin County, Minnesota. It was built in 1902, so it is 123 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 3,000 vehicles a day, projected to reach 3,000 by 2029. The structure is 31 ft (9.4 m) long and 24 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesM 488
CrossesMinnehaha Creek
Location0.4 MI E of JCT TH 100
RouteCity Street 488
Coordinates44.91226, -93.34251
Functional classUrban Local

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating109.8 US tons
Inventory rating69.8 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span25 ft (7.6 m)
Deck width24 ft (7.4 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (1993)
Projected traffic3,000 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$350 million
NavigationNo navigation control on waterway

Frequently asked questions

When was M 488 over Minnehaha Creek built?

It was built in 1902, making it 123 years old in 2025.

What condition is M 488 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 October 2023.

How much traffic does M 488 over Minnehaha Creek carry?

About 3,000 vehicles per day (1993 count).

How long is M 488 over Minnehaha Creek?

The structure is 31 ft (9.4 m) long with a longest span of 25 ft (7.6 m) and a deck 24 ft wide.

Who owns M 488 over Minnehaha Creek?

It is owned by the City or Municipal Highway Agency.