US Bridges

M-94 over Slapneck Creek

Fair

Alger County, Michigan · 1.6 MI W of Forest Lake · Structure no. 000000000000035

Built
1952
73 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete
Length
34 ft
1 main span
Daily traffic
1,763
2007 count
Owner
State
State Highway Agency

About this bridge

M-94 over Slapneck Creek is a concrete tee beam carrying M-94 over Slapneck Creek in Alger County, Michigan. It was built in 1952, so it is 73 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 1,763 vehicles a day, roughly 15% of them trucks, projected to reach 2,201 by 2018. The structure is 34 ft (10.4 m) long and 43 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

Location

Open in Google Maps
CarriesM-94
CrossesSlapneck Creek
Location1.6 MI W of Forest Lake
RouteState Highway 94
CountyAlger County
StateMichigan
Coordinates46.3329, -86.87867
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span31 ft (9.3 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,763 (2007)
Projected traffic2,201 by 2018
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 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-94 over Slapneck Creek built?

It was built in 1952, making it 73 years old in 2025.

What condition is M-94 over Slapneck 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 May 2023.

How much traffic does M-94 over Slapneck Creek carry?

About 1,763 vehicles per day (2007 count), of which roughly 15% are trucks.

How long is M-94 over Slapneck Creek?

The structure is 34 ft (10.4 m) long with a longest span of 31 ft (9.3 m) and a deck 43 ft wide.

Who owns M-94 over Slapneck Creek?

It is owned by the State Highway Agency.