US Bridges

99th Avenue over Papago W Drain Channel

Fair

Maricopa County, Arizona · 300 Ft N JCT I-10 · Structure no. 01819

Built
1982
43 years old
Condition
Fair
inspected February 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
81 ft
1 main span
Daily traffic
31,300
2022 count
Owner
State
State Highway Agency

About this bridge

99th Avenue over Papago W Drain Channel is a prestressed concrete box beam or girders - multiple carrying 99th Avenue over Papago W Drain Channel in Maricopa County, Arizona. It was built in 1982, so it is 43 years old, younger than the Arizona average of 47.8 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 31,300 vehicles a day, roughly 8% of them trucks, projected to reach 31,310 by 2042. The structure is 81 ft (24.7 m) long and 114 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries99th Avenue
CrossesPapago W Drain Channel
Location300 Ft N JCT I-10
RouteState Highway 10
StateArizona
Coordinates33.4628, -112.2725
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating34 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length81 ft (24.7 m)
Longest span78 ft (23.8 m)
Deck width114 ft (34.6 m)
Roadway width98 ft (29.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,300 (2022)
Projected traffic31,310 by 2042
Trucks8%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was 99th Avenue over Papago W Drain Channel built?

It was built in 1982, making it 43 years old in 2025.

What condition is 99th Avenue over Papago W Drain Channel 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 2023.

How much traffic does 99th Avenue over Papago W Drain Channel carry?

About 31,300 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is 99th Avenue over Papago W Drain Channel?

The structure is 81 ft (24.7 m) long with a longest span of 78 ft (23.8 m) and a deck 114 ft wide.

Who owns 99th Avenue over Papago W Drain Channel?

It is owned by the State Highway Agency.