US Bridges

SR 51 over Low Flow Channel

Good

Maricopa County, Arizona · 0.6 MI S JCT L101 · Structure no. 02884

Built
2008
17 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
474 ft
4 main spans
Daily traffic
4,755
2022 count
Owner
State
State Highway Agency

About this bridge

SR 51 over Low Flow Channel is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 51 over Low Flow Channel in Maricopa County, Arizona. It was built in 2008, so it is 17 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 4,755 vehicles a day, roughly 7% of them trucks, projected to reach 4,765 by 2042. The structure is 474 ft (144.5 m) long and 61 ft wide.

Location

Open in Google Maps
CarriesSR 51
CrossesLow Flow Channel
Location0.6 MI S JCT L101
RouteState Highway 51
CountyMaricopa County
StateArizona
Coordinates33.66443, -111.99975
Functional classUrban Local

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length474 ft (144.5 m)
Longest span118 ft (36 m)
Deck width61 ft (18.7 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,755 (2022)
Projected traffic4,765 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 51 over Low Flow Channel built?

It was built in 2008, making it 17 years old in 2025.

What condition is SR 51 over Low Flow Channel 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 2023.

How much traffic does SR 51 over Low Flow Channel carry?

About 4,755 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is SR 51 over Low Flow Channel?

The structure is 474 ft (144.5 m) long with a longest span of 118 ft (36 m) and a deck 61 ft wide.

Who owns SR 51 over Low Flow Channel?

It is owned by the State Highway Agency.