US Bridges

N Saginaw Road over Big Salt River

Fair

Midland County, Michigan · .2 MI NW of West River RD · Structure no. 000000000006937

Built
2001
24 years old
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
162 ft
3 main spans
Daily traffic
6,297
2019 count
Owner
County
County Highway Agency

About this bridge

N Saginaw Road over Big Salt River is a prestressed concrete box beam or girders - multiple carrying N Saginaw Road over Big Salt River 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 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 6,297 vehicles a day, roughly 4% of them trucks, projected to reach 11,373 by 2039. The structure is 162 ft (49.5 m) long and 37 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesN Saginaw Road
CrossesBig Salt River
Location.2 MI NW of West River RD
RouteCounty Highway 0
CountyMidland County
StateMichigan
Coordinates43.67812, -84.39446
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating70.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length162 ft (49.5 m)
Longest span66 ft (20 m)
Deck width37 ft (11.4 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,297 (2019)
Projected traffic11,373 by 2039
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was N Saginaw Road over Big Salt River built?

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

What condition is N Saginaw Road over Big Salt River 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 September 2023.

How much traffic does N Saginaw Road over Big Salt River carry?

About 6,297 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is N Saginaw Road over Big Salt River?

The structure is 162 ft (49.5 m) long with a longest span of 66 ft (20 m) and a deck 37 ft wide.

Who owns N Saginaw Road over Big Salt River?

It is owned by the County Highway Agency.