I-84 in Nampa will be detoured overnight Sept. 16-19 for work on Karcher Overpass

Karcher Overpass under Construction

Interstate 84 will be closed overnight between the Karcher/Midland and Northside interchanges on Monday, Sept. 16 through Thursday, Sept. 19. The closures will allow crews to safely remove the wooden forms that temporarily supported the new bridge deck this summer.

  • Westbound I-84 will be closed for two nights – Sept. 16 and Sept. 17. Each night I-84 will be closed from 10 p.m. to 6 a.m.
  • Eastbound I-84 will be closed for two nights – Sept. 18 and Sept. 19. Each night I-84 will be closed from 10 p.m. to 5 a.m.

During the four overnight closures, motorists will exit I-84 at Karcher/Midland or Northside and follow a detour along Karcher Road. Flaggers will direct traffic. View the detour map.

Lane restrictions and flaggers will also be in place on the Northside Boulevard between the ramps each night while crews begin to work on the new bridge.

The new Karcher Overpass is on schedule to re-open later this fall. Reconstruction of the Northside Interchange has begun and will continue through early 2021.

For more information about the reconstruction of I-84 in Canyon County, visit itdprojects.org/84Corridor. To receive construction updates; text 84corridor to 555888. “Drive Idaho,” ITD’s new podcast series on all things I-84 in Canyon County, is available for download on Spotify and Apple Podcast and other major podcast sharing sites.

New traffic pattern will take effect week of August 4 on westbound I-84 at Franklin Boulevard exit

Traffic on WB I-84 near the Franklin Blvd interchange

Ahead of constructing additional lanes on Interstate 84 in Canyon County, the Idaho Transportation Department is reconfiguring westbound lanes of the Interstate near the Franklin Blvd. interchange.

Currently, three westbound lanes are reduced to two lanes with the far left lane merging into the center lane. In the new configuration, the left lane will no longer merge, remaining a travel lane. The far right lane will end, used as the off-ramp to Franklin Blvd. A similar configuration is on westbound I-84 at the Garrity Blvd. interchange, where the Interstate is reduced from four to three lanes.

A graphic showing the new lane configuration of I-84 near Franklin Blvd.

“This reconfiguration maintains the existing capacity of I-84 during construction,” said ITD Project Manager Styles Salek. “With this change, we remind motorists to slow down, plan ahead and pay attention in construction zones.”

In order to promote the safety of motorists and construction crews, ITD has partnered with the Idaho State Police to provide enhanced patrols throughout the duration of the project.

This change will allow crews to begin adding lanes in the I-84 median between Karcher/Midland and Franklin Boulevard. The addition of lanes is part of the ongoing I-84 corridor project from Nampa to Caldwell. Improvements are expected to improve safety, address congestion and benefit the regional economy for many years.

For more information about the I-84, Karcher to Franklin project, listen to the Drive Idaho podcast, visit itdprojects.org/84corridor or text 555888 to request construction updates. You can also contact ITD at 84corridor@itd.idaho.gov and (208) 334-8002.

Update: I-84 closed overnight June 10, 11 and 12 for girder placement at Karcher Overpass

Karcher Overpass bridge under construction

UPDATE (June 11)

I-84 detours in Nampa have been extended due to equipment-related delays during the Karcher Overpass girder placement. A detour will be in place Tuesday and Wednesday nights (June 11 and 12) between the Karcher/Midland and Northside Boulevard interchanges.

  • Eastbound I-84 will be closed overnight Tuesday, June 11.  A detour will begin at 10 p.m. Tuesday and end at 5 a.m. Wednesday, June 12.
  • Westbound I-84 will be closed overnight Wednesday, June 12. A detour will begin at 10 p.m. Wednesday and end at 6 a.m. Thursday, June 13.

Original Story (June 4)

ITD will require overnight closures on Interstate 84 in Nampa next Tuesday and Wednesday nights (June 10 and 11) to place girders on the new Karcher Road Overpass.

  • Eastbound I-84 will be closed overnight Monday, June 10. A detour will begin at 10 p.m. Monday and end at 5 a.m. Tuesday, June 11.
  • Westbound I-84 will be closed overnight Tuesday, June 11. A detour will begin at 10 p.m. Tuesday and end at 6 a.m. Wednesday, June 12.

Motorists will follow a detour route on Karcher Road both nights. See detour map below.

Detour map of I-84 in Nampa

“ITD will place 10 steel girders over the two nights. Each girder is 136 feet long and weighs approximately 115,670 pounds,” said Alex Deduck, ITD Design/Construction Engineer.  “This is no small operation and we appreciate the patience of the traveling public during the detour.”

ITD is replacing the Karcher Overpass to accommodate additional lanes on I-84. Construction to widen I-84 will begin later this summer.

For more information, visit itdprojects.org/84Corridor, text 84CORRIDOR to 22828 or listen to “Drive Idaho,” ITD’s new podcast series on I-84. Drive Idaho is available on Apple Podcasts, Spotify and other major podcast players.

I-84 will be detoured overnight April 22-26 for Idaho Power transmission line work in Caldwell

A power pole without a line

Interstate 84 will be closed at night between the Franklin Road and Karcher/Midland interchanges April 22-26 while Idaho Power installs a new transmission line across the interstate. A detour will be in place each night between 10 p.m. and 5 a.m.

The detour route will follow Franklin Road (US-20/26) and Midland Road. Please plan ahead and expect delays when traveling in the area. Flaggers will direct traffic.

Idaho Power is installing a new transmission line across I-84. The transmission line will serve the new Skyway Ranch Substation east of the Franklin Road Interchange.

Detour map for I-84 overnight closures
Detour map for I-84 overnight closures April 22-26, 2019

Overnight ramp closures scheduled at Franklin, Northside interchanges in Nampa next week

I-84 Northside Ramp Closure

The westbound on-ramps at the Franklin and Northside interchanges will be closed on several occasions next week while the Idaho Transportation Department rebuilds the interstate shoulders near the ramp.

The westbound I-84 on-ramp at Franklin Boulevard will be closed from 10 p.m. to 6 a.m. on Monday, Nov. 5 and Tuesday, Nov. 6. Motorists can use the ramps at the Garrity and Northside interchanges during the overnight closures.

The westbound on-ramp closure at Northside Boulevard will occur from 8 p.m. to 6 a.m. on Thursday, Nov. 8. Motorists will be directed to use the ramps at the Franklin and Karcher interchanges during the overnight closure.

ITD is widening the I-84 shoulders between the Karcher Road and Franklin Boulevard interchanges this fall in preparation for major construction next spring. Download the project fact sheet for details.

“By moving swiftly to prepare the shoulders this fall, we will be positioned to start the expansion work next year,” said ITD Program Manager Amy Schroeder. “This is the first step of the $330 million investment in I-84 in Canyon County over the next several years. The expansion is a statewide priority to improve safety, mobility and economic opportunity.”

To request email updates about construction activities, text 84CORRIDOR to 22828. For more information on the I-84 expansion project, visit itdprojects.org/i-84-karcher-to-franklin.

Test pile driving rescheduled for July 9-12 on I-84 at Northside Blvd.

Crews drive pylons into the ground for testing

Shoulder restrictions will be in place on Interstate 84 in Nampa at the Northside Boulevard interchange July 9-12. Crews will be driving test piles in the center median as part of early prep work for ITD’s Northside Interchange Replacement Project.

Pile driving will be done during the day; this work is noisy. No lane closures are anticipated, but drivers are urged to slow down and pay attention in the work zone. Crews will set up traffic control and a work zone the night of July 9 and are anticipated to be complete by the end of the week.  Learn more at itd.idaho.gov/84corridor.

This work was originally scheduled to take place June 18-20. It was delayed due to wet ground conditions.