US Bridges

Anchor Bay Drive over Unnamed Canal

Poor

St. Clair County, Michigan · Sec 3 Clay Twp · Structure no. 000000000010027

Built
1980
45 years old
Condition
Poor
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
75 ft
3 main spans
Daily traffic
1,655
1994 count
Owner
County
County Highway Agency

About this bridge

Anchor Bay Drive over Unnamed Canal is a prestressed concrete box beam or girders - multiple carrying Anchor Bay Drive over Unnamed Canal in St. Clair County, Michigan. It was built in 1980, so it is 45 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,655 vehicles a day, roughly 3% of them trucks, projected to reach 1,700 by 2014. The structure is 75 ft (22.8 m) long and 24 ft wide. If it were closed, the detour would be 124.9 mi (201 km).

CarriesAnchor Bay Drive
CrossesUnnamed Canal
LocationSec 3 Clay Twp
RouteCounty Highway 0
Coordinates42.6312, -82.6461
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating60.7 US tons
Inventory rating36.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length75 ft (22.8 m)
Longest span27 ft (8.2 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,655 (1994)
Projected traffic1,700 by 2014
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed124.9 mi (201 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$12,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Anchor Bay Drive over Unnamed Canal built?

It was built in 1980, making it 45 years old in 2025.

What condition is Anchor Bay Drive over Unnamed Canal in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does Anchor Bay Drive over Unnamed Canal carry?

About 1,655 vehicles per day (1994 count), of which roughly 3% are trucks.

How long is Anchor Bay Drive over Unnamed Canal?

The structure is 75 ft (22.8 m) long with a longest span of 27 ft (8.2 m) and a deck 24 ft wide.

Who owns Anchor Bay Drive over Unnamed Canal?

It is owned by the County Highway Agency.