US Bridges

Salzburg RD over I-75

Fair

Bay County, Michigan · 4.0 MI N of Saginaw Col · Structure no. 000000000000604

Built
1960
65 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
212 ft
4 main spans
Daily traffic
5,197
1997 count
Owner
State
State Highway Agency

About this bridge

Salzburg RD over I-75 is a steel stringer/multi-beam or girder carrying Salzburg RD over I-75 in Bay County, Michigan. It was built in 1960, so it is 65 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 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 5,197 vehicles a day, roughly 3% of them trucks, projected to reach 6,230 by 1977. The structure is 212 ft (64.6 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSalzburg RD
CrossesI-75
Location4.0 MI N of Saginaw Col
RouteCounty Highway 2008
CountyBay County
StateMichigan
Coordinates43.5806, -83.94863
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating40.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length212 ft (64.6 m)
Longest span71 ft (21.5 m)
Deck width33 ft (10.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,197 (1997)
Projected traffic6,230 by 1977
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$576,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Salzburg RD over I-75 built?

It was built in 1960, making it 65 years old in 2025.

What condition is Salzburg RD over I-75 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 February 2025.

How much traffic does Salzburg RD over I-75 carry?

About 5,197 vehicles per day (1997 count), of which roughly 3% are trucks.

How long is Salzburg RD over I-75?

The structure is 212 ft (64.6 m) long with a longest span of 71 ft (21.5 m) and a deck 33 ft wide.

Who owns Salzburg RD over I-75?

It is owned by the State Highway Agency.