US Bridges

Squirrel RD NB over M-59

Fair

Oakland County, Michigan · Pontiac Twp Sec 25 · Structure no. 000000000007840

Built
1999
26 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
259 ft
4 main spans
Daily traffic
12,630
2021 count
Owner
State
State Highway Agency

About this bridge

Squirrel RD NB over M-59 is a prestressed concrete box beam or girders - multiple carrying Squirrel RD NB 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 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 12,630 vehicles a day, roughly 1% of them trucks, projected to reach 14,525 by 2041. The structure is 259 ft (79 m) long and 55 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesSquirrel RD NB
CrossesM-59
LocationPontiac Twp Sec 25
RouteCity Street 0
CountyOakland County
StateMichigan
Coordinates42.64344, -83.21964
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.8 US tons
Inventory rating17.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length259 ft (79 m)
Longest span138 ft (42.1 m)
Deck width55 ft (16.8 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,630 (2021)
Projected traffic14,525 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 NB over M-59 built?

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

What condition is Squirrel RD NB 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 NB over M-59 carry?

About 12,630 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Squirrel RD NB over M-59?

The structure is 259 ft (79 m) long with a longest span of 138 ft (42.1 m) and a deck 55 ft wide.

Who owns Squirrel RD NB over M-59?

It is owned by the State Highway Agency.