Northbound ramp to I-19 in Nogales to close this weekend

Drilling holes for ramp-supporting piers on SR 189 project

PHOENIX – Drilling will begin this weekend on the first holes that will support a new flyover ramp connecting State Route 189 with northbound Interstate 19, part of a $134 million project to improve safety and international commerce in Nogales.

For the safety of work crews, the ramp connecting SR 189 with I-19 will be closed from 8 p.m. Friday, June 12, until 6 a.m. Monday, June 15. The three remaining ramps at the interchange will remain open.

The holes drilled this weekend are the first of several that will be filled with concrete and steel rebar as the base for piers that will support the ramps, which will allow vehicles on northbound SR 189 to enter northbound I-19 without stopping for traffic lights. The holes will be about 80 feet deep and about 10 feet across.

Drivers can access northbound I-19 by continuing east on SR 189, known locally as Mariposa Road, to Business I-19 (Grand Avenue), then driving north about 3 miles to connect with I-19’ They also can reach northbound I-19 from Western Avenue.

The ramp is the first of two flyover ramps that will connect SR 189 with I-19. A second flyover ramp connecting southbound I-19 with southbound SR 189 also is part of the project. The ramps will connect with SR 189 just west of Frank Reed Road. 

The improvements will allow commercial trucks carrying goods from Mexico to reach I-19 without stopping at three traffic signals, saving time and money for trucking companies and making Nogales a more-attractive port for international commerce. It also will improve safety on SR 189 by removing trucks from the route before they reach the entrance to Nogales High School.

The project, expected to take 18 months to complete, also includes building a roundabout at SR 189 and Target Range Road as well as a new traffic signal, drainage improvements and additional work along the route, including improvements east of I-19 and on Grand Avenue. The existing freeway on- and off-ramps will remain.

The work is funded in part by a $25 million investment by the Arizona Legislature and a $25 million federal TIGER (Transportation Investment Generating Economic Recovery) grant.

For more information, please visit azdot.gov/SR189.