US Bridges

M 4 over W Br Sunrise River

FairClosed to traffic

Chisago County, Minnesota · 0.2 MI S of JCT Csah 19 · Structure no. 4029

Built
1925
100 years old
Condition
Fair
inspected December 2011
Type
Girder and Floorbeam System
Concrete
Length
31 ft
1 main span
Daily traffic
30
1970 count
Owner
City
City or Municipal Highway Agency

About this bridge

M 4 over W Br Sunrise River is a concrete girder and floorbeam system carrying M 4 over W Br Sunrise River in Chisago 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 5 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: closed to all traffic.

It carries about 30 vehicles a day, projected to reach 30 by 2029. The structure is 31 ft (9.4 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesM 4
CrossesW Br Sunrise River
Location0.2 MI S of JCT Csah 19
RouteCity Street 4
CountyChisago County
StateMinnesota
Coordinates45.39475, -92.98364
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure8 Very GoodNo problems noted.
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 inspectionDecember 2011
Inspection intervalevery 12 months
Operating statusClosed to all traffic
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.8 US tons
Inventory rating29.5 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span28 ft (8.6 m)
Deck width28 ft (8.6 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (1970)
Projected traffic30 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was M 4 over W Br Sunrise River built?

It was built in 1925, making it 100 years old in 2025.

What condition is M 4 over W Br Sunrise River 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 December 2011.

How much traffic does M 4 over W Br Sunrise River carry?

About 30 vehicles per day (1970 count).

How long is M 4 over W Br Sunrise River?

The structure is 31 ft (9.4 m) long with a longest span of 28 ft (8.6 m) and a deck 28 ft wide.

Who owns M 4 over W Br Sunrise River?

It is owned by the City or Municipal Highway Agency.