US Bridges

Gresham HWY over Little Thornapple River

Fair

Eaton County, Michigan · 0.75 MI E of Gresham · Structure no. 000000000002390

Built
1979
46 years old
Condition
Fair
inspected May 2023
Type
Slab
Wood or Timber
Length
48 ft
2 main spans
Daily traffic
74
2011 count
Owner
County
County Highway Agency

About this bridge

Gresham HWY over Little Thornapple River is a wood or timber slab carrying Gresham HWY over Little Thornapple River in Eaton County, Michigan. It was built in 1979, so it is 46 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 74 vehicles a day, projected to reach 200 by 2013. The structure is 48 ft (14.6 m) long and 26 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesGresham HWY
CrossesLittle Thornapple River
Location0.75 MI E of Gresham
RouteCounty Highway 0
CountyEaton County
StateMichigan
Coordinates42.64057, -84.88066
Functional classRural Local

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 protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating41.1 US tons
Inventory rating33.2 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 20
Structure length48 ft (14.6 m)
Longest span23 ft (7 m)
Deck width26 ft (8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic74 (2011)
Projected traffic200 by 2013
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Gresham HWY over Little Thornapple River built?

It was built in 1979, making it 46 years old in 2025.

What condition is Gresham HWY over Little Thornapple 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 May 2023.

How much traffic does Gresham HWY over Little Thornapple River carry?

About 74 vehicles per day (2011 count).

How long is Gresham HWY over Little Thornapple River?

The structure is 48 ft (14.6 m) long with a longest span of 23 ft (7 m) and a deck 26 ft wide.

Who owns Gresham HWY over Little Thornapple River?

It is owned by the County Highway Agency.