US Bridges

Lamb RD over Santa Rosa Canal

Fair

Pinal County, Arizona · 0.5 MI S JCT Houser Road · Structure no. 08962

Built
1987
38 years old, rebuilt 1989
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
57 ft
1 main span
Daily traffic
60
2022 count
Owner
County
County Highway Agency

About this bridge

Lamb RD over Santa Rosa Canal is a prestressed concrete stringer/multi-beam or girder carrying Lamb RD over Santa Rosa Canal in Pinal County, Arizona. It was built in 1987 and reconstructed in 1989, so it is 38 years old, younger than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 60 vehicles a day, projected to reach 70 by 2042. The structure is 57 ft (17.4 m) long and 45 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesLamb RD
CrossesSanta Rosa Canal
Location0.5 MI S JCT Houser Road
RouteCounty Highway 0
CountyPinal County
StateArizona
Coordinates32.7699, -111.6884
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
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 alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating53 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span55 ft (16.8 m)
Deck width45 ft (13.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deck24 ft (7.3 m)

Traffic and service

Average daily traffic60 (2022)
Projected traffic70 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

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 Lamb RD over Santa Rosa Canal built?

It was built in 1987, making it 38 years old in 2025. It was reconstructed in 1989.

What condition is Lamb RD over Santa Rosa Canal in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.

How much traffic does Lamb RD over Santa Rosa Canal carry?

About 60 vehicles per day (2022 count).

How long is Lamb RD over Santa Rosa Canal?

The structure is 57 ft (17.4 m) long with a longest span of 55 ft (16.8 m) and a deck 45 ft wide.

Who owns Lamb RD over Santa Rosa Canal?

It is owned by the County Highway Agency.