US Bridges

Marshall RD over Mill Creek

Fair

Washtenaw County, Michigan · Scio Twp Sec 18 · Structure no. 000000000011026

Built
1976
49 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
78 ft
1 main span
Daily traffic
807
2006 count
Owner
County
County Highway Agency

About this bridge

Marshall RD over Mill Creek is a prestressed concrete box beam or girders - multiple carrying Marshall RD over Mill Creek in Washtenaw County, Michigan. It was built in 1976, so it is 49 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 807 vehicles a day, projected to reach 1,457 by 2026. The structure is 78 ft (23.7 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMarshall RD
CrossesMill Creek
LocationScio Twp Sec 18
RouteCounty Highway 0
CountyWashtenaw County
StateMichigan
Coordinates42.30478, -83.88926
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 rating74 US tons
Inventory rating44.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length78 ft (23.7 m)
Longest span78 ft (23.7 m)
Deck width34 ft (10.3 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic807 (2006)
Projected traffic1,457 by 2026
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$384,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Marshall RD over Mill Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is Marshall RD over Mill Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.

How much traffic does Marshall RD over Mill Creek carry?

About 807 vehicles per day (2006 count).

How long is Marshall RD over Mill Creek?

The structure is 78 ft (23.7 m) long with a longest span of 78 ft (23.7 m) and a deck 34 ft wide.

Who owns Marshall RD over Mill Creek?

It is owned by the County Highway Agency.