US Bridges

M-311 (11 Mile Rd) over Nottawa Creek

FairPosted for load

Calhoun County, Michigan · 7.6 MI S of I-94 · Structure no. 000000000001321

Built
1984
41 years old
Condition
Fair
inspected August 2024
Type
Slab
Wood or Timber
Length
24 ft
1 main span
Daily traffic
2,342
2007 count
Owner
State
State Highway Agency

About this bridge

M-311 (11 Mile Rd) over Nottawa Creek is a wood or timber slab carrying M-311 (11 Mile Rd) over Nottawa Creek in Calhoun County, Michigan. It was built in 1984, so it is 41 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. Its operating status is: posted for load restriction.

It carries about 2,342 vehicles a day, roughly 2% of them trucks, projected to reach 5,662 by 2018. The structure is 24 ft (7.3 m) long and 32 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesM-311 (11 Mile Rd)
CrossesNottawa Creek
Location7.6 MI S of I-94
RouteState Highway 311
CountyCalhoun County
StateMichigan
Coordinates42.19073, -85.08022
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating35.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width32 ft (9.7 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,342 (2007)
Projected traffic5,662 by 2018
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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-311 (11 Mile Rd) over Nottawa Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is M-311 (11 Mile Rd) over Nottawa Creek 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 August 2024.

How much traffic does M-311 (11 Mile Rd) over Nottawa Creek carry?

About 2,342 vehicles per day (2007 count), of which roughly 2% are trucks.

How long is M-311 (11 Mile Rd) over Nottawa Creek?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 32 ft wide.

Who owns M-311 (11 Mile Rd) over Nottawa Creek?

It is owned by the State Highway Agency.