US Bridges

Control Road over Gibb Wash

Poor

Pima County, Arizona · 1.5 MI Ne/O Oracle Rdg Mn · Structure no. 030505000003004

Built
1950
75 years old, rebuilt 2004
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
24 ft
2 main spans
Daily traffic
85
2021 count
Owner
Federal
U.S. Forest Service

About this bridge

Control Road over Gibb Wash is a wood or timber stringer/multi-beam or girder carrying Control Road over Gibb Wash in Pima County, Arizona. It was built in 1950 and reconstructed in 2004, so it is 75 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 85 vehicles a day, projected to reach 150 by 2040. The structure is 24 ft (7.3 m) long and 16 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesControl Road
CrossesGibb Wash
Location1.5 MI Ne/O Oracle Rdg Mn
RouteFederal Lands Road 38
CountyPima County
StateArizona
Coordinates32.48354, -110.7064
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating41.4 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 15
Structure length24 ft (7.3 m)
Longest span16 ft (4.8 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic85 (2021)
Projected traffic150 by 2040
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Control Road over Gibb Wash built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2004.

What condition is Control Road over Gibb Wash in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does Control Road over Gibb Wash carry?

About 85 vehicles per day (2021 count).

How long is Control Road over Gibb Wash?

The structure is 24 ft (7.3 m) long with a longest span of 16 ft (4.8 m) and a deck 16 ft wide.

Who owns Control Road over Gibb Wash?

It is owned by the U.S. Forest Service.