US Bridges

M-18 over Bluff Creek

Good

Midland County, Michigan · 0.8 MI N of US-10 · Structure no. 000000000006885

Built
2001
24 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
100 ft
1 main span
Daily traffic
4,766
2007 count
Owner
State
State Highway Agency

About this bridge

M-18 over Bluff Creek is a prestressed concrete stringer/multi-beam or girder carrying M-18 over Bluff Creek in Midland County, Michigan. It was built in 2001, so it is 24 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 4,766 vehicles a day, roughly 5% of them trucks, projected to reach 5,965 by 2018. The structure is 100 ft (30.4 m) long and 47 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesM-18
CrossesBluff Creek
Location0.8 MI N of US-10
RouteState Highway 18
CountyMidland County
StateMichigan
Coordinates43.74197, -84.48687
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.2 US tons
Inventory rating42.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length100 ft (30.4 m)
Longest span100 ft (30.4 m)
Deck width47 ft (14.4 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,766 (2007)
Projected traffic5,965 by 2018
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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-18 over Bluff Creek built?

It was built in 2001, making it 24 years old in 2025.

What condition is M-18 over Bluff Creek 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 2024.

How much traffic does M-18 over Bluff Creek carry?

About 4,766 vehicles per day (2007 count), of which roughly 5% are trucks.

How long is M-18 over Bluff Creek?

The structure is 100 ft (30.4 m) long with a longest span of 100 ft (30.4 m) and a deck 47 ft wide.

Who owns M-18 over Bluff Creek?

It is owned by the State Highway Agency.