US Bridges

M-15 over Butternut Creek

Good

Genesee County, Michigan · 1.4 MI N of M-57 · Structure no. 000000000002617

Built
1997
28 years old
Condition
Good
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
38 ft
1 main span
Daily traffic
7,165
2007 count
Owner
State
State Highway Agency

About this bridge

M-15 over Butternut Creek is a prestressed concrete box beam or girders - multiple carrying M-15 over Butternut Creek in Genesee County, Michigan. It was built in 1997, so it is 28 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 7,165 vehicles a day, roughly 5% of them trucks, projected to reach 9,364 by 2018. The structure is 38 ft (11.7 m) long and 47 ft wide.

CarriesM-15
CrossesButternut Creek
Location1.4 MI N of M-57
RouteState Highway 15
Coordinates43.2024, -83.5203
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating47.8 US tons

Structure

MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length38 ft (11.7 m)
Longest span38 ft (11.7 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,165 (2007)
Projected traffic9,364 by 2018
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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-15 over Butternut Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is M-15 over Butternut 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 July 2024.

How much traffic does M-15 over Butternut Creek carry?

About 7,165 vehicles per day (2007 count), of which roughly 5% are trucks.

How long is M-15 over Butternut Creek?

The structure is 38 ft (11.7 m) long with a longest span of 38 ft (11.7 m) and a deck 47 ft wide.

Who owns M-15 over Butternut Creek?

It is owned by the State Highway Agency.