US Bridges

Ramp 91B over Ramp 99D

Good

Maricopa County, Arizona · JCT SR L101 · Structure no. 02205

Built
1998
27 years old
Condition
Good
inspected February 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
149 ft
1 main span
Daily traffic
40,080
2021 count
Owner
State
State Highway Agency

About this bridge

Ramp 91B over Ramp 99D is a prestressed concrete box beam or girders - single or spread carrying Ramp 91B over Ramp 99D in Maricopa County, Arizona. It was built in 1998, so it is 27 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 40,080 vehicles a day, roughly 11% of them trucks, projected to reach 40,090 by 2041. The structure is 149 ft (45.4 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesRamp 91B
CrossesRamp 99D
LocationJCT SR L101
RouteInterstate 10
StateArizona
Coordinates33.4612, -112.269
Functional classUrban Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86 US tons
Inventory rating42 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length149 ft (45.4 m)
Longest span145 ft (44.2 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,080 (2021)
Projected traffic40,090 by 2041
Trucks11%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Ramp 91B over Ramp 99D built?

It was built in 1998, making it 27 years old in 2025.

What condition is Ramp 91B over Ramp 99D 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 February 2023.

How much traffic does Ramp 91B over Ramp 99D carry?

About 40,080 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is Ramp 91B over Ramp 99D?

The structure is 149 ft (45.4 m) long with a longest span of 145 ft (44.2 m) and a deck 29 ft wide.

Who owns Ramp 91B over Ramp 99D?

It is owned by the State Highway Agency.