US Bridges

North Cass Street over Boardman River

Good

Grand Traverse County, Michigan · In Traverse City · Structure no. 000000000003077

Built
1960
65 years old, rebuilt 2023
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
60 ft
1 main span
Daily traffic
3,533
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

North Cass Street over Boardman River is a steel stringer/multi-beam or girder carrying North Cass Street over Boardman River in Grand Traverse County, Michigan. It was built in 1960 and reconstructed in 2023, so it is 65 years old, older than the Michigan average of 48.3 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 3,533 vehicles a day, roughly 8% of them trucks, projected to reach 4,063 by 2042. The structure is 60 ft (18.3 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNorth Cass Street
CrossesBoardman River
LocationIn Traverse City
RouteCity Street 2020
Coordinates44.7648, -85.621
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
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 evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating98.5 US tons
Inventory rating76.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length60 ft (18.3 m)
Longest span57 ft (17.4 m)
Deck width46 ft (14.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,533 (2022)
Projected traffic4,063 by 2042
Trucks8%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was North Cass Street over Boardman River built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2023.

What condition is North Cass Street over Boardman River 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 June 2023.

How much traffic does North Cass Street over Boardman River carry?

About 3,533 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is North Cass Street over Boardman River?

The structure is 60 ft (18.3 m) long with a longest span of 57 ft (17.4 m) and a deck 46 ft wide.

Who owns North Cass Street over Boardman River?

It is owned by the City or Municipal Highway Agency.