US Bridges

Wilkes Road over Mill Creek

PoorPosted for load

St. Clair County, Michigan · SEC.23-26 Brockway Twp. · Structure no. 000000000010119

Built
1980
45 years old
Condition
Poor
inspected November 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
120
1994 count
Owner
County
County Highway Agency

About this bridge

Wilkes Road over Mill Creek is a prestressed concrete box beam or girders - multiple carrying Wilkes Road over Mill Creek 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. Its operating status is: posted for load restriction.

It carries about 120 vehicles a day, roughly 3% of them trucks, projected to reach 130 by 2014. The structure is 62 ft (18.9 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesWilkes Road
CrossesMill Creek
LocationSEC.23-26 Brockway Twp.
RouteCounty Highway 0
CountySt. Clair County
StateMichigan
Coordinates43.10115, -82.79556
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40.3 US tons
Inventory rating23.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length62 ft (18.9 m)
Longest span58 ft (17.6 m)
Deck width31 ft (9.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (1994)
Projected traffic130 by 2014
Trucks3%
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$7,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Wilkes Road over Mill Creek built?

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

What condition is Wilkes Road over Mill Creek 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 November 2024.

How much traffic does Wilkes Road over Mill Creek carry?

About 120 vehicles per day (1994 count), of which roughly 3% are trucks.

How long is Wilkes Road over Mill Creek?

The structure is 62 ft (18.9 m) long with a longest span of 58 ft (17.6 m) and a deck 31 ft wide.

Who owns Wilkes Road over Mill Creek?

It is owned by the County Highway Agency.