US Bridges

Whittaker Road over Stonycreek

Fair

Washtenaw County, Michigan · Augusta Twp Section 34 · Structure no. 000000000011003

Built
1986
39 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
1,094
2013 count
Owner
County
County Highway Agency

About this bridge

Whittaker Road over Stonycreek is a prestressed concrete box beam or girders - multiple carrying Whittaker Road over Stonycreek in Washtenaw County, Michigan. It was built in 1986, so it is 39 years old, younger 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 1,094 vehicles a day, roughly 15% of them trucks, projected to reach 2,592 by 2023. The structure is 60 ft (18.2 m) long and 44 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesWhittaker Road
CrossesStonycreek
LocationAugusta Twp Section 34
RouteCounty Highway 8189
CountyWashtenaw County
StateMichigan
Coordinates42.09552, -83.59855
Functional classRural Major 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.
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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating40.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length60 ft (18.2 m)
Longest span60 ft (18.2 m)
Deck width44 ft (13.4 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,094 (2013)
Projected traffic2,592 by 2023
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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$220,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Whittaker Road over Stonycreek built?

It was built in 1986, making it 39 years old in 2025.

What condition is Whittaker Road over Stonycreek 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 Whittaker Road over Stonycreek carry?

About 1,094 vehicles per day (2013 count), of which roughly 15% are trucks.

How long is Whittaker Road over Stonycreek?

The structure is 60 ft (18.2 m) long with a longest span of 60 ft (18.2 m) and a deck 44 ft wide.

Who owns Whittaker Road over Stonycreek?

It is owned by the County Highway Agency.