US Bridges

Johnston St. over Power Canal

Fair

Chippewa County, Michigan · In Sault Ste Marie · Structure no. 000000000001678

Built
1979
46 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
284 ft
1 main span
Daily traffic
3,720
1997 count
Owner
City
City or Municipal Highway Agency

About this bridge

Johnston St. over Power Canal is a steel stringer/multi-beam or girder carrying Johnston St. over Power Canal in Chippewa County, Michigan. It was built in 1979, so it is 46 years old, younger than the Michigan average of 48.3 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 3,720 vehicles a day, roughly 53% of them trucks, projected to reach 5,210 by 2019. The structure is 284 ft (86.5 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesJohnston St.
CrossesPower Canal
LocationIn Sault Ste Marie
RouteCity Street 0
CountyChippewa County
StateMichigan
Coordinates46.49333, -84.34091
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.4 US tons
Inventory rating55 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length284 ft (86.5 m)
Longest span277 ft (84.4 m)
Deck width42 ft (12.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,720 (1997)
Projected traffic5,210 by 2019
Trucks53%
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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$22,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Johnston St. over Power Canal built?

It was built in 1979, making it 46 years old in 2025.

What condition is Johnston St. over Power Canal 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 June 2023.

How much traffic does Johnston St. over Power Canal carry?

About 3,720 vehicles per day (1997 count), of which roughly 53% are trucks.

How long is Johnston St. over Power Canal?

The structure is 284 ft (86.5 m) long with a longest span of 277 ft (84.4 m) and a deck 42 ft wide.

Who owns Johnston St. over Power Canal?

It is owned by the City or Municipal Highway Agency.