US Bridges

Tonapah Drive over Lake

Good

Maricopa County, Arizona · 100 E of 55th Avenue · Structure no. 08828

Built
1985
40 years old
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
98 ft
2 main spans
Daily traffic
310
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Tonapah Drive over Lake is a prestressed concrete box beam or girders - multiple carrying Tonapah Drive over Lake in Maricopa County, Arizona. It was built in 1985, so it is 40 years old, younger than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 310 vehicles a day, roughly 1% of them trucks, projected to reach 320 by 2042. The structure is 98 ft (29.9 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesTonapah Drive
CrossesLake
Location100 E of 55th Avenue
RouteCity Street 0
StateArizona
Coordinates33.67128, -112.17708
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93 US tons
Inventory rating55 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length98 ft (29.9 m)
Longest span48 ft (14.6 m)
Deck width56 ft (17.1 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic310 (2024)
Projected traffic320 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Tonapah Drive over Lake built?

It was built in 1985, making it 40 years old in 2025.

What condition is Tonapah Drive over Lake in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does Tonapah Drive over Lake carry?

About 310 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Tonapah Drive over Lake?

The structure is 98 ft (29.9 m) long with a longest span of 48 ft (14.6 m) and a deck 56 ft wide.

Who owns Tonapah Drive over Lake?

It is owned by the City or Municipal Highway Agency.