US Bridges

Forest Hill Road over Cox Drain

Fair

Clinton County, Michigan · 1/4 MI S of Island RD · Structure no. 000000000001925

Built
1968
57 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
1,635
2011 count
Owner
County
County Highway Agency

About this bridge

Forest Hill Road over Cox Drain is a prestressed concrete box beam or girders - multiple carrying Forest Hill Road over Cox Drain in Clinton County, Michigan. It was built in 1968, so it is 57 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 1,635 vehicles a day, roughly 5% of them trucks, projected to reach 2,953 by 2031. The structure is 32 ft (9.7 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesForest Hill Road
CrossesCox Drain
Location1/4 MI S of Island RD
RouteCounty Highway 1935
Coordinates43.08874, -84.6801
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.3 US tons
Inventory rating34.9 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadH 20
Structure length32 ft (9.7 m)
Longest span30 ft (9.1 m)
Deck width31 ft (9.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,635 (2011)
Projected traffic2,953 by 2031
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Forest Hill Road over Cox Drain built?

It was built in 1968, making it 57 years old in 2025.

What condition is Forest Hill Road over Cox Drain 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 October 2024.

How much traffic does Forest Hill Road over Cox Drain carry?

About 1,635 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is Forest Hill Road over Cox Drain?

The structure is 32 ft (9.7 m) long with a longest span of 30 ft (9.1 m) and a deck 31 ft wide.

Who owns Forest Hill Road over Cox Drain?

It is owned by the County Highway Agency.