US Bridges

M-84|WESTSIDE Sagi over I-75 NB

Fair

Bay County, Michigan · 2.6 MI N of Saginaw Col · Structure no. 000000000000601

Built
2009
16 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
192 ft
3 main spans
Daily traffic
11,860
2010 count
Owner
State
State Highway Agency

About this bridge

M-84|WESTSIDE Sagi over I-75 NB is a steel continuous stringer/multi-beam or girder carrying M-84|WESTSIDE Sagi over I-75 NB 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 fair condition with a lowest component rating of 6 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 11,860 vehicles a day, roughly 7% of them trucks, projected to reach 13,102 by 2030. The structure is 192 ft (58.6 m) long and 75 ft wide.

Location

Open in Google Maps
CarriesM-84|WESTSIDE Sagi
CrossesI-75 NB
Location2.6 MI N of Saginaw Col
RouteState Highway 84
CountyBay County
StateMichigan
Coordinates43.55994, -83.94759
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.8 US tons
Inventory rating48.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadGreater than HL 93
Structure length192 ft (58.6 m)
Longest span103 ft (31.5 m)
Deck width75 ft (23 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,860 (2010)
Projected traffic13,102 by 2030
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was M-84|WESTSIDE Sagi over I-75 NB built?

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

What condition is M-84|WESTSIDE Sagi over I-75 NB 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 October 2024.

How much traffic does M-84|WESTSIDE Sagi over I-75 NB carry?

About 11,860 vehicles per day (2010 count), of which roughly 7% are trucks.

How long is M-84|WESTSIDE Sagi over I-75 NB?

The structure is 192 ft (58.6 m) long with a longest span of 103 ft (31.5 m) and a deck 75 ft wide.

Who owns M-84|WESTSIDE Sagi over I-75 NB?

It is owned by the State Highway Agency.