US Bridges

M-66 over Battle Creek River

Fair

Calhoun County, Michigan · 3.5 MI N of I-94 · Structure no. 000000000001199

Built
1966
59 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
86 ft
2 main spans
Daily traffic
15,300
2013 count
Owner
State
State Highway Agency

About this bridge

M-66 over Battle Creek River is a prestressed concrete stringer/multi-beam or girder carrying M-66 over Battle Creek River in Calhoun County, Michigan. It was built in 1966, so it is 59 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 15,300 vehicles a day, roughly 2% of them trucks, projected to reach 26,074 by 2018. The structure is 86 ft (26.2 m) long and 75 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesM-66
CrossesBattle Creek River
Location3.5 MI N of I-94
RouteState Highway 66
CountyCalhoun County
StateMichigan
Coordinates42.31878, -85.17867
Functional classUrban Other Principal Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.5 US tons
Inventory rating32.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length86 ft (26.2 m)
Longest span43 ft (13.1 m)
Deck width75 ft (22.9 m)
Roadway width57 ft (17.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,300 (2013)
Projected traffic26,074 by 2018
Trucks2%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 M-66 over Battle Creek River built?

It was built in 1966, making it 59 years old in 2025.

What condition is M-66 over Battle Creek 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 July 2023.

How much traffic does M-66 over Battle Creek River carry?

About 15,300 vehicles per day (2013 count), of which roughly 2% are trucks.

How long is M-66 over Battle Creek River?

The structure is 86 ft (26.2 m) long with a longest span of 43 ft (13.1 m) and a deck 75 ft wide.

Who owns M-66 over Battle Creek River?

It is owned by the State Highway Agency.