US Bridges

Patterson Road over San Francisco River

Good

Greenlee County, Arizona · 0.6 MI N JCT US 191 · Structure no. 08974

Built
1987
38 years old
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
234 ft
3 main spans
Daily traffic
200
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Patterson Road over San Francisco River is a prestressed concrete box beam or girders - multiple carrying Patterson Road over San Francisco River in Greenlee 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 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 200 vehicles a day, roughly 1% of them trucks, projected to reach 210 by 2042. The structure is 234 ft (71.3 m) long and 30 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesPatterson Road
CrossesSan Francisco River
Location0.6 MI N JCT US 191
RouteCity Street 0
StateArizona
Coordinates33.0635, -109.3016
Functional classRural Minor Collector

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 protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40 US tons
Inventory rating24 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length234 ft (71.3 m)
Longest span78 ft (23.8 m)
Deck width30 ft (9.2 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2022)
Projected traffic210 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Patterson Road over San Francisco River built?

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

What condition is Patterson Road over San Francisco River 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 August 2023.

How much traffic does Patterson Road over San Francisco River carry?

About 200 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Patterson Road over San Francisco River?

The structure is 234 ft (71.3 m) long with a longest span of 78 ft (23.8 m) and a deck 30 ft wide.

Who owns Patterson Road over San Francisco River?

It is owned by the Town or Township Highway Agency.