US Bridges

Custer Road over Black River I/C Drain

Fair

Sanilac County, Michigan · Sec 19-30 Bridgehampton · Structure no. 000000000009573

Built
1996
29 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
100 ft
1 main span
Daily traffic
225
2010 count
Owner
County
County Highway Agency

About this bridge

Custer Road over Black River I/C Drain is a prestressed concrete box beam or girders - multiple carrying Custer Road over Black River I/C Drain in Sanilac County, Michigan. It was built in 1996, so it is 29 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 225 vehicles a day, roughly 10% of them trucks, projected to reach 405 by 2030. The structure is 100 ft (30.5 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCuster Road
CrossesBlack River I/C Drain
LocationSec 19-30 Bridgehampton
RouteCounty Highway 0
CountySanilac County
StateMichigan
Coordinates43.45342, -82.73923
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating72.9 US tons
Inventory rating36.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span98 ft (30 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2010)
Projected traffic405 by 2030
Trucks10%
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 Custer Road over Black River I/C Drain built?

It was built in 1996, making it 29 years old in 2025.

What condition is Custer Road over Black River I/C 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 June 2024.

How much traffic does Custer Road over Black River I/C Drain carry?

About 225 vehicles per day (2010 count), of which roughly 10% are trucks.

How long is Custer Road over Black River I/C Drain?

The structure is 100 ft (30.5 m) long with a longest span of 98 ft (30 m) and a deck 34 ft wide.

Who owns Custer Road over Black River I/C Drain?

It is owned by the County Highway Agency.