US Bridges

Mercury Drive over Millhouse Bayou

Good

Ottawa County, Michigan · 0.23 MI S of Groesbeck ST · Structure no. 000000000008830

Built
2007
18 years old
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
44 ft
1 main span
Daily traffic
9,373
2019 count
Owner
County
County Highway Agency

About this bridge

Mercury Drive over Millhouse Bayou is a prestressed concrete box beam or girders - single or spread carrying Mercury Drive over Millhouse Bayou in Ottawa County, Michigan. It was built in 2007, so it is 18 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 9,373 vehicles a day, roughly 5% of them trucks, projected to reach 16,930 by 2039. The structure is 44 ft (13.4 m) long and 55 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesMercury Drive
CrossesMillhouse Bayou
Location0.23 MI S of Groesbeck ST
RouteCounty Highway 7027
CountyOttawa County
StateMichigan
Coordinates43.02389, -86.15488
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating96.8 US tons
Inventory rating56.1 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length44 ft (13.4 m)
Longest span44 ft (13.4 m)
Deck width55 ft (16.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,373 (2019)
Projected traffic16,930 by 2039
Trucks5%
Lanes on structure3
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 Mercury Drive over Millhouse Bayou built?

It was built in 2007, making it 18 years old in 2025.

What condition is Mercury Drive over Millhouse Bayou in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.

How much traffic does Mercury Drive over Millhouse Bayou carry?

About 9,373 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is Mercury Drive over Millhouse Bayou?

The structure is 44 ft (13.4 m) long with a longest span of 44 ft (13.4 m) and a deck 55 ft wide.

Who owns Mercury Drive over Millhouse Bayou?

It is owned by the County Highway Agency.