US Bridges

Plymouth Road over Flemming Creek

Poor

Washtenaw County, Michigan · Superior Twp Sec 7 · Structure no. 000000000010982

Built
1981
44 years old
Condition
Poor
inspected July 2024
Type
Culvert
Steel
Length
29 ft
1 main span
Daily traffic
7,431
2005 count
Owner
County
County Highway Agency

About this bridge

Plymouth Road over Flemming Creek is a steel culvert carrying Plymouth Road over Flemming Creek in Washtenaw County, Michigan. It was built in 1981, so it is 44 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 3 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.

It carries about 7,431 vehicles a day, roughly 12% of them trucks, projected to reach 13,420 by 2025. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesPlymouth Road
CrossesFlemming Creek
LocationSuperior Twp Sec 7
RouteCounty Highway 8172
CountyWashtenaw County
StateMichigan
Coordinates42.31896, -83.64676
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
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length29 ft (8.8 m)
Longest span29 ft (8.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,431 (2005)
Projected traffic13,420 by 2025
Trucks12%
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$140,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Plymouth Road over Flemming Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is Plymouth Road over Flemming 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 July 2024.

How much traffic does Plymouth Road over Flemming Creek carry?

About 7,431 vehicles per day (2005 count), of which roughly 12% are trucks.

How long is Plymouth Road over Flemming Creek?

The structure is 29 ft (8.8 m) long with a longest span of 29 ft (8.8 m).

Who owns Plymouth Road over Flemming Creek?

It is owned by the County Highway Agency.