US Bridges

M-66 over Quaker Brook

Good

Barry County, Michigan · 2.5 MI S of Nashville · Structure no. 000000000013356

Built
2006
19 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete
Length
36 ft
1 main span
Daily traffic
2,159
2007 count
Owner
State
State Highway Agency

About this bridge

M-66 over Quaker Brook is a concrete culvert carrying M-66 over Quaker Brook in Barry County, Michigan. It was built in 2006, so it is 19 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,159 vehicles a day, roughly 7% of them trucks, projected to reach 7,500 by 2026. The structure is 36 ft (10.9 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesM-66
CrossesQuaker Brook
Location2.5 MI S of Nashville
RouteState Highway 66
CountyBarry County
StateMichigan
Coordinates42.56735, -85.09528
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.7 US tons
Inventory rating41.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length36 ft (10.9 m)
Longest span36 ft (10.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,159 (2007)
Projected traffic7,500 by 2026
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 Quaker Brook built?

It was built in 2006, making it 19 years old in 2025.

What condition is M-66 over Quaker 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 March 2023.

How much traffic does M-66 over Quaker Brook carry?

About 2,159 vehicles per day (2007 count), of which roughly 7% are trucks.

How long is M-66 over Quaker Brook?

The structure is 36 ft (10.9 m) long with a longest span of 36 ft (10.9 m).

Who owns M-66 over Quaker Brook?

It is owned by the State Highway Agency.