US Bridges

Route 515 over Day S River

FairPosted for load

Delta County, Michigan · 2 MI N of Gladstone · Structure no. 000000000002141

Built
1940
85 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete
Length
48 ft
2 main spans
Daily traffic
783
2021 count
Owner
County
County Highway Agency

About this bridge

Route 515 over Day S River is a concrete slab carrying Route 515 over Day S River in Delta County, Michigan. It was built in 1940, so it is 85 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 783 vehicles a day, roughly 8% of them trucks, projected to reach 861 by 2041. The structure is 48 ft (14.6 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesRoute 515
CrossesDay S River
Location2 MI N of Gladstone
RouteCounty Highway 0
CountyDelta County
StateMichigan
Coordinates45.89494, -86.99281
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.2 US tons
Inventory rating31.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length48 ft (14.6 m)
Longest span23 ft (7 m)
Deck width40 ft (12.3 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic783 (2021)
Projected traffic861 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Route 515 over Day S River built?

It was built in 1940, making it 85 years old in 2025.

What condition is Route 515 over Day S 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 June 2023.

How much traffic does Route 515 over Day S River carry?

About 783 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Route 515 over Day S River?

The structure is 48 ft (14.6 m) long with a longest span of 23 ft (7 m) and a deck 40 ft wide.

Who owns Route 515 over Day S River?

It is owned by the County Highway Agency.