US Bridges

Marlette Road over Elk Creek Drain

Good

Sanilac County, Michigan · Sec 33 Watertown Twp · Structure no. 000000000009528

Built
1983
42 years old
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
75 ft
1 main span
Daily traffic
725
2017 count
Owner
County
County Highway Agency

About this bridge

Marlette Road over Elk Creek Drain is a prestressed concrete box beam or girders - multiple carrying Marlette Road over Elk Creek Drain in Sanilac County, Michigan. It was built in 1983, so it is 42 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 725 vehicles a day, roughly 10% of them trucks, projected to reach 1,309 by 2037. The structure is 75 ft (22.9 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesMarlette Road
CrossesElk Creek Drain
LocationSec 33 Watertown Twp
RouteCounty Highway 7432
Coordinates43.33393, -82.81957
Functional classRural Major 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating46.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span74 ft (22.5 m)
Deck width34 ft (10.5 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic725 (2017)
Projected traffic1,309 by 2037
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$179,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Marlette Road over Elk Creek Drain built?

It was built in 1983, making it 42 years old in 2025.

What condition is Marlette Road over Elk Creek Drain 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 May 2024.

How much traffic does Marlette Road over Elk Creek Drain carry?

About 725 vehicles per day (2017 count), of which roughly 10% are trucks.

How long is Marlette Road over Elk Creek Drain?

The structure is 75 ft (22.9 m) long with a longest span of 74 ft (22.5 m) and a deck 34 ft wide.

Who owns Marlette Road over Elk Creek Drain?

It is owned by the County Highway Agency.