US Bridges

Coolidge Road over Rouge River

Fair

Oakland County, Michigan · 0.1 MI N of Long Lake RD · Structure no. 000000000008307

Built
1972
53 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete Continuous
Length
38 ft
2 main spans
Daily traffic
6,000
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

Coolidge Road over Rouge River is a concrete continuous culvert carrying Coolidge Road over Rouge River in Oakland County, Michigan. It was built in 1972, so it is 53 years old, older 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 6 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 6,000 vehicles a day, roughly 3% of them trucks, projected to reach 6,900 by 2035. The structure is 38 ft (11.6 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCoolidge Road
CrossesRouge River
Location0.1 MI N of Long Lake RD
RouteCity Street 0
CountyOakland County
StateMichigan
Coordinates42.5917, -83.18829
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.2 US tons
Inventory rating37.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length38 ft (11.6 m)
Longest span17 ft (5.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,000 (2015)
Projected traffic6,900 by 2035
Trucks3%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 Coolidge Road over Rouge River built?

It was built in 1972, making it 53 years old in 2025.

What condition is Coolidge Road over Rouge 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 April 2023.

How much traffic does Coolidge Road over Rouge River carry?

About 6,000 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is Coolidge Road over Rouge River?

The structure is 38 ft (11.6 m) long with a longest span of 17 ft (5.2 m).

Who owns Coolidge Road over Rouge River?

It is owned by the City or Municipal Highway Agency.