US Bridges

Site 4 Bldg. 815 T over Drainage Ditch

Good

Pima County, Arizona · Site 4 Tank Farm West Acc · Structure no. AF49ACHA0001313

Built
1994
31 years old
Condition
Good
inspected November 2023
Type
Frame
Concrete Continuous
Length
34 ft
3 main spans
Daily traffic
10
2017 count
Owner
Federal
Air Force

About this bridge

Site 4 Bldg. 815 T over Drainage Ditch is a concrete continuous frame carrying Site 4 Bldg. 815 T over Drainage Ditch in Pima County, Arizona. It was built in 1994, so it is 31 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 10 vehicles a day, projected to reach 12 by 2037. The structure is 34 ft (10.3 m) long and 20 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSite 4 Bldg. 815 T
CrossesDrainage Ditch
LocationSite 4 Tank Farm West Acc
StateArizona
Coordinates32.09999, -110.94514
Functional classRural 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length34 ft (10.3 m)
Longest span10 ft (3 m)
Deck width20 ft (6.1 m)
Roadway width18 ft (5.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2017)
Projected traffic12 by 2037
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkNon-Interstate STRAHNET route

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Site 4 Bldg. 815 T over Drainage Ditch built?

It was built in 1994, making it 31 years old in 2025.

What condition is Site 4 Bldg. 815 T over Drainage Ditch 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 Site 4 Bldg. 815 T over Drainage Ditch carry?

About 10 vehicles per day (2017 count).

How long is Site 4 Bldg. 815 T over Drainage Ditch?

The structure is 34 ft (10.3 m) long with a longest span of 10 ft (3 m) and a deck 20 ft wide.

Who owns Site 4 Bldg. 815 T over Drainage Ditch?

It is owned by the Air Force.