US Bridges

Sl 101 Ramp W-S over Tunnel Outfall

Good

Maricopa County, Arizona · Under Ramp 202WB to 101SB · Structure no. 06971

Built
1992
33 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete Continuous
Length
40 ft
3 main spans
Daily traffic
2,000
2022 count
Owner
State
State Highway Agency

About this bridge

Sl 101 Ramp W-S over Tunnel Outfall is a concrete continuous culvert carrying Sl 101 Ramp W-S over Tunnel Outfall in Maricopa County, Arizona. It was built in 1992, so it is 33 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 2,000 vehicles a day, roughly 5% of them trucks, projected to reach 2,010 by 2042. The structure is 40 ft (12.2 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSl 101 Ramp W-S
CrossesTunnel Outfall
LocationUnder Ramp 202WB to 101SB
RouteState Highway 101
CountyMaricopa County
StateArizona
Coordinates33.43609, -111.8904
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2022)
Projected traffic2,010 by 2042
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sl 101 Ramp W-S over Tunnel Outfall built?

It was built in 1992, making it 33 years old in 2025.

What condition is Sl 101 Ramp W-S over Tunnel Outfall 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 November 2024.

How much traffic does Sl 101 Ramp W-S over Tunnel Outfall carry?

About 2,000 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Sl 101 Ramp W-S over Tunnel Outfall?

The structure is 40 ft (12.2 m) long with a longest span of 12 ft (3.7 m).

Who owns Sl 101 Ramp W-S over Tunnel Outfall?

It is owned by the State Highway Agency.