US Bridges

Platt Road over Saline River

Fair

Washtenaw County, Michigan · York Twp Section 34 & 35 · Structure no. 000000000011010

Built
1970
55 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
104 ft
2 main spans
Daily traffic
4,600
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Platt Road over Saline River is a steel continuous stringer/multi-beam or girder carrying Platt Road over Saline River in Washtenaw County, Michigan. It was built in 1970, so it is 55 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 6 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 4,600 vehicles a day, projected to reach 5,030 by 2043. The structure is 104 ft (31.7 m) long and 40 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesPlatt Road
CrossesSaline River
LocationYork Twp Section 34 & 35
RouteCity Street 0
CountyWashtenaw County
StateMichigan
Coordinates42.08419, -83.69575
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating68.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length104 ft (31.7 m)
Longest span52 ft (15.8 m)
Deck width40 ft (12.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,600 (2023)
Projected traffic5,030 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Platt Road over Saline River built?

It was built in 1970, making it 55 years old in 2025.

What condition is Platt Road over Saline River 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 November 2023.

How much traffic does Platt Road over Saline River carry?

About 4,600 vehicles per day (2023 count).

How long is Platt Road over Saline River?

The structure is 104 ft (31.7 m) long with a longest span of 52 ft (15.8 m) and a deck 40 ft wide.

Who owns Platt Road over Saline River?

It is owned by the City or Municipal Highway Agency.