US Bridges

M-19 over Salt River

Fair

Macomb County, Michigan · 3.3 MI SW of ST Clair Col · Structure no. 000000000006136

Built
1991
34 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
35 ft
1 main span
Daily traffic
12,497
2007 count
Owner
State
State Highway Agency

About this bridge

M-19 over Salt River is a prestressed concrete box beam or girders - multiple carrying M-19 over Salt River in Macomb County, Michigan. It was built in 1991, so it is 34 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 12,497 vehicles a day, roughly 2% of them trucks, projected to reach 23,880 by 2018. The structure is 35 ft (10.7 m) long and 51 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesM-19
CrossesSalt River
Location3.3 MI SW of ST Clair Col
RouteState Highway 19
CountyMacomb County
StateMichigan
Coordinates42.75264, -82.77005
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating91.1 US tons
Inventory rating54.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length35 ft (10.7 m)
Longest span34 ft (10.3 m)
Deck width51 ft (15.6 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,497 (2007)
Projected traffic23,880 by 2018
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was M-19 over Salt River built?

It was built in 1991, making it 34 years old in 2025.

What condition is M-19 over 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 April 2024.

How much traffic does M-19 over Salt River carry?

About 12,497 vehicles per day (2007 count), of which roughly 2% are trucks.

How long is M-19 over Salt River?

The structure is 35 ft (10.7 m) long with a longest span of 34 ft (10.3 m) and a deck 51 ft wide.

Who owns M-19 over Salt River?

It is owned by the State Highway Agency.