US Bridges

Grand Valley Road over Cap Canal

Fair

Pinal County, Arizona · 1.7 MI SE Missile Base RD · Structure no. 08972

Built
1987
38 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete Continuous
Length
59 ft
3 main spans
Daily traffic
20
2022 count
Owner
State
Other State Agency

About this bridge

Grand Valley Road over Cap Canal is a concrete continuous culvert carrying Grand Valley Road over Cap Canal in Pinal County, Arizona. It was built in 1987, 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 20 vehicles a day, projected to reach 30 by 2042. The structure is 59 ft (18 m) long. If it were closed, the detour would be 5 mi (8 km).

CarriesGrand Valley Road
CrossesCap Canal
Location1.7 MI SE Missile Base RD
RouteFederal Lands Road 0
StateArizona
Coordinates32.5018, -111.233
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length59 ft (18 m)
Longest span16 ft (4.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2022)
Projected traffic30 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

OwnerOther State Agency
Maintained byOther State 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 Grand Valley Road over Cap Canal built?

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

What condition is Grand Valley Road over Cap 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 October 2024.

How much traffic does Grand Valley Road over Cap Canal carry?

About 20 vehicles per day (2022 count).

How long is Grand Valley Road over Cap Canal?

The structure is 59 ft (18 m) long with a longest span of 16 ft (4.9 m).

Who owns Grand Valley Road over Cap Canal?

It is owned by the Other State Agency.