US Bridges

Research Loop over Drainageway

Good

Pima County, Arizona · 0.5 MI E Pantano RD · Structure no. 08918

Built
1986
39 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete Continuous
Length
45 ft
4 main spans
Daily traffic
500
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Research Loop over Drainageway is a concrete continuous culvert carrying Research Loop over Drainageway in Pima County, Arizona. It was built in 1986, so it is 39 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 500 vehicles a day, roughly 10% of them trucks, projected to reach 510 by 2042. The structure is 45 ft (13.7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesResearch Loop
CrossesDrainageway
Location0.5 MI E Pantano RD
RouteCity Street 0
StateArizona
Coordinates32.19942, -110.82344
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2022)
Projected traffic510 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Research Loop over Drainageway built?

It was built in 1986, making it 39 years old in 2025.

What condition is Research Loop over Drainageway 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 December 2023.

How much traffic does Research Loop over Drainageway carry?

About 500 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Research Loop over Drainageway?

The structure is 45 ft (13.7 m) long with a longest span of 10 ft (3 m).

Who owns Research Loop over Drainageway?

It is owned by the City or Municipal Highway Agency.