US Bridges

MC-85 over 303L Drainage Sys

Good

Maricopa County, Arizona · 0.75 MI W/ Cotton Lane · Structure no. 11425

Built
2014
11 years old
Condition
Good
inspected December 2022
Type
Culvert
Concrete Continuous
Length
75 ft
6 main spans
Daily traffic
11,824
2020 count
Owner
County
County Highway Agency

About this bridge

MC-85 over 303L Drainage Sys is a concrete continuous culvert carrying MC-85 over 303L Drainage Sys in Maricopa County, Arizona. It was built in 2014, so it is 11 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 11,824 vehicles a day, roughly 10% of them trucks, projected to reach 11,834 by 2040. The structure is 75 ft (22.9 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesMC-85
Crosses303L Drainage Sys
Location0.75 MI W/ Cotton Lane
RouteCounty Highway 0
CountyMaricopa County
StateArizona
Coordinates33.40021, -112.4385
Functional classUrban Other Principal Arterial

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 inspectionDecember 2022
Inspection intervalevery 36 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 alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating70 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans6
Design loadHS 20
Structure length75 ft (22.9 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 traffic11,824 (2020)
Projected traffic11,834 by 2040
Trucks10%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 MC-85 over 303L Drainage Sys built?

It was built in 2014, making it 11 years old in 2025.

What condition is MC-85 over 303L Drainage Sys 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 December 2022.

How much traffic does MC-85 over 303L Drainage Sys carry?

About 11,824 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is MC-85 over 303L Drainage Sys?

The structure is 75 ft (22.9 m) long with a longest span of 12 ft (3.7 m).

Who owns MC-85 over 303L Drainage Sys?

It is owned by the County Highway Agency.