US Bridges

Whittum Road over Spring Brook

Good

Eaton County, Michigan · 1 MI W of Eaton Rapids · Structure no. 000000000002402

Built
2017
8 years old
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
51 ft
1 main span
Daily traffic
607
2016 count
Owner
County
County Highway Agency

About this bridge

Whittum Road over Spring Brook is a prestressed concrete box beam or girders - single or spread carrying Whittum Road over Spring Brook in Eaton County, Michigan. It was built in 2017, so it is 8 years old, younger 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 607 vehicles a day, roughly 2% of them trucks, projected to reach 700 by 2036. The structure is 51 ft (15.5 m) long and 37 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesWhittum Road
CrossesSpring Brook
Location1 MI W of Eaton Rapids
RouteCounty Highway 0
CountyEaton County
StateMichigan
Coordinates42.49785, -84.67972
Functional classRural Local

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 protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.8 US tons
Inventory rating73.2 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length51 ft (15.5 m)
Longest span49 ft (14.8 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic607 (2016)
Projected traffic700 by 2036
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Whittum Road over Spring Brook built?

It was built in 2017, making it 8 years old in 2025.

What condition is Whittum Road over Spring Brook 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 June 2023.

How much traffic does Whittum Road over Spring Brook carry?

About 607 vehicles per day (2016 count), of which roughly 2% are trucks.

How long is Whittum Road over Spring Brook?

The structure is 51 ft (15.5 m) long with a longest span of 49 ft (14.8 m) and a deck 37 ft wide.

Who owns Whittum Road over Spring Brook?

It is owned by the County Highway Agency.