US Bridges

Parker Road over Trib to Mill Creek

PoorPosted for load

Washtenaw County, Michigan · Scio Twp Sec 30 · Structure no. 000000000013913

Built
1968
57 years old
Condition
Poor
inspected September 2024
Type
Culvert
Steel
Length
20 ft
1 main span
Daily traffic
300
2014 count
Owner
County
County Highway Agency

About this bridge

Parker Road over Trib to Mill Creek is a steel culvert carrying Parker Road over Trib to Mill Creek in Washtenaw County, Michigan. It was built in 1968, so it is 57 years old, older 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. Its operating status is: posted for load restriction.

It carries about 300 vehicles a day, projected to reach 345 by 2034. The structure is 20 ft (6.2 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesParker Road
CrossesTrib to Mill Creek
LocationScio Twp Sec 30
RouteCounty Highway 8139
CountyWashtenaw County
StateMichigan
Coordinates42.2681, -83.89706
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating20 US tons
Inventory rating11.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length20 ft (6.2 m)
Longest span20 ft (6.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2014)
Projected traffic345 by 2034
Trucks0%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Parker Road over Trib to Mill Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is Parker Road over Trib to 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 September 2024.

How much traffic does Parker Road over Trib to Mill Creek carry?

About 300 vehicles per day (2014 count).

How long is Parker Road over Trib to Mill Creek?

The structure is 20 ft (6.2 m) long with a longest span of 20 ft (6.2 m).

Who owns Parker Road over Trib to Mill Creek?

It is owned by the County Highway Agency.