US Bridges

M-84|WESTSIDE Sagi over Squaconning Creek

Good

Bay County, Michigan · 0.29 MI SW of I-75 JCT · Structure no. 000000000000579

Built
2009
16 years old
Condition
Good
inspected March 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
19,900
2010 count
Owner
State
State Highway Agency

About this bridge

M-84|WESTSIDE Sagi over Squaconning Creek is a prestressed concrete box beam or girders - single or spread carrying M-84|WESTSIDE Sagi over Squaconning Creek in Bay County, Michigan. It was built in 2009, so it is 16 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 19,900 vehicles a day, roughly 2% of them trucks, projected to reach 22,000 by 2030. The structure is 60 ft (18.3 m) long and 84 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesM-84|WESTSIDE Sagi
CrossesSquaconning Creek
Location0.29 MI SW of I-75 JCT
RouteState Highway 84
CountyBay County
StateMichigan
Coordinates43.55569, -83.9514
Functional classRural Principal Arterial - Other

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 protection8 Very GoodNo problems noted.
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
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.3 US tons
Inventory rating47.2 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length60 ft (18.3 m)
Longest span58 ft (17.7 m)
Deck width84 ft (25.5 m)
Roadway width81 ft (24.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,900 (2010)
Projected traffic22,000 by 2030
Trucks2%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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-84|WESTSIDE Sagi over Squaconning Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is M-84|WESTSIDE Sagi over Squaconning 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 March 2023.

How much traffic does M-84|WESTSIDE Sagi over Squaconning Creek carry?

About 19,900 vehicles per day (2010 count), of which roughly 2% are trucks.

How long is M-84|WESTSIDE Sagi over Squaconning Creek?

The structure is 60 ft (18.3 m) long with a longest span of 58 ft (17.7 m) and a deck 84 ft wide.

Who owns M-84|WESTSIDE Sagi over Squaconning Creek?

It is owned by the State Highway Agency.