US Bridges

Adams Street over Black River Tributary

PoorPosted for load

Ottawa County, Michigan · 0.59 Miles W of 64th Ave · Structure no. 000000000008808

Built
1973
52 years old
Condition
Poor
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
34 ft
1 main span
Daily traffic
6,840
2023 count
Owner
County
County Highway Agency

About this bridge

Adams Street over Black River Tributary is a prestressed concrete box beam or girders - multiple carrying Adams Street over Black River Tributary in Ottawa County, Michigan. It was built in 1973, so it is 52 years old, older 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. Its operating status is: posted for load restriction.

It carries about 6,840 vehicles a day, roughly 5% of them trucks, projected to reach 12,350 by 2043. The structure is 34 ft (10.4 m) long and 42 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesAdams Street
CrossesBlack River Tributary
Location0.59 Miles W of 64th Ave
RouteCounty Highway 7004
Coordinates42.78308, -85.95214
Functional classRural Major Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating31.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span30 ft (9.1 m)
Deck width42 ft (12.9 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,840 (2023)
Projected traffic12,350 by 2043
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 Adams Street over Black River Tributary built?

It was built in 1973, making it 52 years old in 2025.

What condition is Adams Street over Black River Tributary 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 October 2024.

How much traffic does Adams Street over Black River Tributary carry?

About 6,840 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Adams Street over Black River Tributary?

The structure is 34 ft (10.4 m) long with a longest span of 30 ft (9.1 m) and a deck 42 ft wide.

Who owns Adams Street over Black River Tributary?

It is owned by the County Highway Agency.