US Bridges

Dirt Road over S. Kolb Rd.

Fair

Pima County, Arizona · S. of Yuma · Structure no. 2360026P0000000

Built
2010
15 years old
Condition
Fair
inspected December 2024
Type
Other
Prestressed Concrete Continuous
Length
155 ft
2 main spans
Daily traffic
30
2021 count
Owner
Federal
Air Force

About this bridge

Dirt Road over S. Kolb Rd. is a prestressed concrete continuous other carrying Dirt Road over S. Kolb Rd. in Pima County, Arizona. It was built in 2010, so it is 15 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 30 vehicles a day, projected to reach 35 by 2031. The structure is 155 ft (47.2 m) long and 23 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesDirt Road
CrossesS. Kolb Rd.
LocationS. of Yuma
RouteFederal Lands Road 0
CountyPima County
StateArizona
Coordinates32.14447, -110.8407
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79 US tons
Inventory rating47 US tons

Structure

Structure typeOther
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length155 ft (47.2 m)
Longest span75 ft (22.9 m)
Deck width23 ft (7 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2021)
Projected traffic35 by 2031
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerAir Force
Maintained byAir Force
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 Dirt Road over S. Kolb Rd. built?

It was built in 2010, making it 15 years old in 2025.

What condition is Dirt Road over S. Kolb Rd. 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 December 2024.

How much traffic does Dirt Road over S. Kolb Rd. carry?

About 30 vehicles per day (2021 count).

How long is Dirt Road over S. Kolb Rd.?

The structure is 155 ft (47.2 m) long with a longest span of 75 ft (22.9 m) and a deck 23 ft wide.

Who owns Dirt Road over S. Kolb Rd.?

It is owned by the Air Force.