US Bridges

Stone School RD over I-94

Fair

Washtenaw County, Michigan · In Ann Arbor · Structure no. 000000000010836

Built
1954
71 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete Continuous
Length
173 ft
4 main spans
Daily traffic
350
1978 count
Owner
State
State Highway Agency

About this bridge

Stone School RD over I-94 is a concrete continuous tee beam carrying Stone School RD over I-94 in Washtenaw County, Michigan. It was built in 1954, so it is 71 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 350 vehicles a day, projected to reach 350 by 1977. The structure is 173 ft (52.7 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesStone School RD
CrossesI-94
LocationIn Ann Arbor
RouteCounty Highway 2006
CountyWashtenaw County
StateMichigan
Coordinates42.23738, -83.72009
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating55.7 US tons
Inventory rating33.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length173 ft (52.7 m)
Longest span49 ft (14.9 m)
Deck width31 ft (9.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (1978)
Projected traffic350 by 1977
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Stone School RD over I-94 built?

It was built in 1954, making it 71 years old in 2025.

What condition is Stone School RD over I-94 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 2024.

How much traffic does Stone School RD over I-94 carry?

About 350 vehicles per day (1978 count).

How long is Stone School RD over I-94?

The structure is 173 ft (52.7 m) long with a longest span of 49 ft (14.9 m) and a deck 31 ft wide.

Who owns Stone School RD over I-94?

It is owned by the State Highway Agency.