US Bridges

Squirrel RD SB over M-59

Fair

Oakland County, Michigan · Pontiac Twp Sec 25 · Structure no. 000000000012831

Built
1999
26 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
359 ft
4 main spans
Daily traffic
17,560
2021 count
Owner
State
State Highway Agency

About this bridge

Squirrel RD SB over M-59 is a prestressed concrete box beam or girders - multiple carrying Squirrel RD SB over M-59 in Oakland County, Michigan. It was built in 1999, so it is 26 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 5 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 17,560 vehicles a day, roughly 1% of them trucks, projected to reach 20,194 by 2041. The structure is 359 ft (109.4 m) long and 64 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSquirrel RD SB
CrossesM-59
LocationPontiac Twp Sec 25
RouteCity Street 0
CountyOakland County
StateMichigan
Coordinates42.64339, -83.22003
Functional classUrban 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
Deck8 Very GoodNo problems noted.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.7 US tons
Inventory rating19 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length359 ft (109.4 m)
Longest span136 ft (41.5 m)
Deck width64 ft (19.6 m)
Roadway width52 ft (15.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,560 (2021)
Projected traffic20,194 by 2041
Trucks1%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Squirrel RD SB over M-59 built?

It was built in 1999, making it 26 years old in 2025.

What condition is Squirrel RD SB over M-59 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 2024.

How much traffic does Squirrel RD SB over M-59 carry?

About 17,560 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Squirrel RD SB over M-59?

The structure is 359 ft (109.4 m) long with a longest span of 136 ft (41.5 m) and a deck 64 ft wide.

Who owns Squirrel RD SB over M-59?

It is owned by the State Highway Agency.