US Bridges

Putnuam Drive over Walnut Lake Canal

Good

Oakland County, Michigan · 0.2 MI N of Walnut Lk RD · Structure no. 000000000013957

Built
2017
8 years old
Condition
Good
inspected June 2024
Type
Slab
Wood or Timber
Length
26 ft
1 main span
Daily traffic
50
2017 count
Owner
County
County Highway Agency

About this bridge

Putnuam Drive over Walnut Lake Canal is a wood or timber slab carrying Putnuam Drive over Walnut Lake Canal in Oakland County, Michigan. It was built in 2017, so it is 8 years old, younger 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 50 vehicles a day, projected to reach 75 by 2037. The structure is 26 ft (7.9 m) long and 22 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesPutnuam Drive
CrossesWalnut Lake Canal
Location0.2 MI N of Walnut Lk RD
RouteCounty Highway 0
CountyOakland County
StateMichigan
Coordinates42.55519, -83.32797
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating78.3 US tons
Inventory rating60.4 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadGreater than HL 93
Structure length26 ft (7.9 m)
Longest span24 ft (7.3 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2017)
Projected traffic75 by 2037
Trucks0%
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

OwnerCounty Highway Agency
Maintained byCounty 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 Putnuam Drive over Walnut Lake Canal built?

It was built in 2017, making it 8 years old in 2025.

What condition is Putnuam Drive over Walnut Lake Canal 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 2024.

How much traffic does Putnuam Drive over Walnut Lake Canal carry?

About 50 vehicles per day (2017 count).

How long is Putnuam Drive over Walnut Lake Canal?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 22 ft wide.

Who owns Putnuam Drive over Walnut Lake Canal?

It is owned by the County Highway Agency.