US Bridges

Ramp E - N over I 10 Mcdowell & Rp 99C

Good

Maricopa County, Arizona · South of I 10 / E of 99 · Structure no. 02203

Built
1998
27 years old
Condition
Good
inspected February 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
2,483 ft
18 main spans
Daily traffic
23,942
2018 count
Owner
State
State Highway Agency

About this bridge

Ramp E - N over I 10 Mcdowell & Rp 99C is a prestressed concrete continuous box beam or girders - single or spread carrying Ramp E - N over I 10 Mcdowell & Rp 99C 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 23,942 vehicles a day, roughly 4% of them trucks, projected to reach 23,952 by 2038. The structure is 2,483 ft (756.8 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesRamp E - N
CrossesI 10 Mcdowell & Rp 99C
LocationSouth of I 10 / E of 99
RouteState Highway 101
StateArizona
Coordinates33.46165, -112.26946
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating48 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans18
Design loadHS 20
Structure length2,483 ft (756.8 m)
Longest span164 ft (50 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,942 (2018)
Projected traffic23,952 by 2038
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesThird level (interchange)
CrossesHighway and waterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$5,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Ramp E - N over I 10 Mcdowell & Rp 99C built?

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

What condition is Ramp E - N over I 10 Mcdowell & Rp 99C 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 E - N over I 10 Mcdowell & Rp 99C carry?

About 23,942 vehicles per day (2018 count), of which roughly 4% are trucks.

How long is Ramp E - N over I 10 Mcdowell & Rp 99C?

The structure is 2,483 ft (756.8 m) long with a longest span of 164 ft (50 m) and a deck 31 ft wide.

Who owns Ramp E - N over I 10 Mcdowell & Rp 99C?

It is owned by the State Highway Agency.