US Bridges

SB 19 over Ephraim Canyon

Good

Santa Cruz County, Arizona · 1.38 MI North US Border · Structure no. 06699

Built
1950
75 years old
Condition
Good
inspected April 2024
Type
Culvert
Concrete Continuous
Length
33 ft
3 main spans
Daily traffic
13,500
2023 count
Owner
State
State Highway Agency

About this bridge

SB 19 over Ephraim Canyon is a concrete continuous culvert carrying SB 19 over Ephraim Canyon in Santa Cruz County, Arizona. It was built in 1950, 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 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 13,500 vehicles a day, roughly 10% of them trucks, projected to reach 13,510 by 2042. The structure is 33 ft (10.1 m) long and 93 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSB 19
CrossesEphraim Canyon
Location1.38 MI North US Border
RouteState Highway 19
StateArizona
Coordinates31.34803, -110.93003
Functional classUrban Other Principal Arterial

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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width93 ft (28.2 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,500 (2023)
Projected traffic13,510 by 2042
Trucks10%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SB 19 over Ephraim Canyon built?

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

What condition is SB 19 over Ephraim Canyon 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 April 2024.

How much traffic does SB 19 over Ephraim Canyon carry?

About 13,500 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is SB 19 over Ephraim Canyon?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m) and a deck 93 ft wide.

Who owns SB 19 over Ephraim Canyon?

It is owned by the State Highway Agency.