US Bridges

M 75 over Stream

Fair

Rock County, Minnesota · 0.5 MI S of JCT Csah 4 · Structure no. L2257

Built
1910
115 years old
Condition
Fair
inspected October 2023
Type
Arch - Deck
Concrete
Length
21 ft
1 main span
Daily traffic
297
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

M 75 over Stream is a concrete arch - deck carrying M 75 over Stream in Rock County, Minnesota. It was built in 1910, so it is 115 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.

It carries about 297 vehicles a day, projected to reach 112 by 2042. The structure is 21 ft (6.4 m) long and 18 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesM 75
CrossesStream
Location0.5 MI S of JCT Csah 4
RouteCity Street 75
CountyRock County
StateMinnesota
Coordinates43.64841, -96.19461
Functional classRural 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
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating32.4 US tons
Inventory rating21.6 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span18 ft (5.4 m)
Deck width18 ft (5.4 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic297 (2022)
Projected traffic112 by 2042
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
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 statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$90 million
NavigationNo navigation control on waterway

Frequently asked questions

When was M 75 over Stream built?

It was built in 1910, making it 115 years old in 2025.

What condition is M 75 over Stream 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 75 over Stream carry?

About 297 vehicles per day (2022 count).

How long is M 75 over Stream?

The structure is 21 ft (6.4 m) long with a longest span of 18 ft (5.4 m) and a deck 18 ft wide.

Who owns M 75 over Stream?

It is owned by the City or Municipal Highway Agency.