US Bridges

Dennison Road over Saline River

Good

Washtenaw County, Michigan · York Twp Sec 28 · Structure no. 000000000011000

Built
1965
60 years old, rebuilt 2021
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
92 ft
1 main span
Daily traffic
1,049
2020 count
Owner
County
County Highway Agency

About this bridge

Dennison Road over Saline River is a prestressed concrete stringer/multi-beam or girder carrying Dennison Road over Saline River in Washtenaw County, Michigan. It was built in 1965 and reconstructed in 2021, so it is 60 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,049 vehicles a day, roughly 19% of them trucks, projected to reach 1,559 by 2040. The structure is 92 ft (28 m) long and 34 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

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CarriesDennison Road
CrossesSaline River
LocationYork Twp Sec 28
RouteCounty Highway 8175
CountyWashtenaw County
StateMichigan
Coordinates42.10154, -83.73351
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating94.2 US tons
Inventory rating57.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length92 ft (28 m)
Longest span89 ft (27 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,049 (2020)
Projected traffic1,559 by 2040
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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$535,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Dennison Road over Saline River built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2021.

What condition is Dennison Road over Saline River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does Dennison Road over Saline River carry?

About 1,049 vehicles per day (2020 count), of which roughly 19% are trucks.

How long is Dennison Road over Saline River?

The structure is 92 ft (28 m) long with a longest span of 89 ft (27 m) and a deck 34 ft wide.

Who owns Dennison Road over Saline River?

It is owned by the County Highway Agency.