US Bridges

Tompkins RD over Grand River

Fair

Jackson County, Michigan · 1.5 MI N of Tompkins · Structure no. 000000000004494

Built
1958
67 years old, rebuilt 1993
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
120 ft
2 main spans
Daily traffic
1,130
2002 count
Owner
County
County Highway Agency

About this bridge

Tompkins RD over Grand River is a prestressed concrete box beam or girders - multiple carrying Tompkins RD over Grand River in Jackson County, Michigan. It was built in 1958 and reconstructed in 1993, so it is 67 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 1,130 vehicles a day, projected to reach 1,700 by 2020. The structure is 120 ft (36.5 m) long and 37 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesTompkins RD
CrossesGrand River
Location1.5 MI N of Tompkins
RouteCounty Highway 0
CountyJackson County
StateMichigan
Coordinates42.39081, -84.54159
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86 US tons
Inventory rating51.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20
Structure length120 ft (36.5 m)
Longest span60 ft (18.2 m)
Deck width37 ft (11.4 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,130 (2002)
Projected traffic1,700 by 2020
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Tompkins RD over Grand River built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1993.

What condition is Tompkins RD over Grand 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 October 2024.

How much traffic does Tompkins RD over Grand River carry?

About 1,130 vehicles per day (2002 count).

How long is Tompkins RD over Grand River?

The structure is 120 ft (36.5 m) long with a longest span of 60 ft (18.2 m) and a deck 37 ft wide.

Who owns Tompkins RD over Grand River?

It is owned by the County Highway Agency.