US Bridges

Tyler Road over Willow Run

Fair

Washtenaw County, Michigan · Ypsilanti Twp Sec 12 · Structure no. 000000000010972

Built
1942
83 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete Continuous
Length
38 ft
4 main spans
Daily traffic
1,643
2006 count
Owner
County
County Highway Agency

About this bridge

Tyler Road over Willow Run is a concrete continuous slab carrying Tyler Road over Willow Run in Washtenaw County, Michigan. It was built in 1942, so it is 83 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 5 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 1,643 vehicles a day, roughly 18% of them trucks, projected to reach 2,967 by 2026. The structure is 38 ft (11.5 m) long and 55 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesTyler Road
CrossesWillow Run
LocationYpsilanti Twp Sec 12
RouteCounty Highway 0
CountyWashtenaw County
StateMichigan
Coordinates42.23266, -83.54742
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23.4 US tons
Inventory rating14 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length38 ft (11.5 m)
Longest span9 ft (2.7 m)
Deck width55 ft (16.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,643 (2006)
Projected traffic2,967 by 2026
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Tyler Road over Willow Run built?

It was built in 1942, making it 83 years old in 2025.

What condition is Tyler Road over Willow Run 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 Tyler Road over Willow Run carry?

About 1,643 vehicles per day (2006 count), of which roughly 18% are trucks.

How long is Tyler Road over Willow Run?

The structure is 38 ft (11.5 m) long with a longest span of 9 ft (2.7 m) and a deck 55 ft wide.

Who owns Tyler Road over Willow Run?

It is owned by the County Highway Agency.