Skip to content

District 3

District 3 – Southwest Idaho


Southwest Idaho

d3_rainbowbridge267x200District 3 covers just under 22,000 square miles of southwest Idaho and maintains 2,647 lane miles and 399 bridges. District 3 encompasses the 10 southwest counties, the most roads and bridges of all the districts, and nearly 40 percent of the state’s population.

District headquarters is in Boise located in Ada County, where Amy Revis is district (head) engineer. Julie DeLorenzo, of Boise, has represented District 3 on the Idaho Transportation Board since March 2012.

District 3 Contact Information
District 3 Phone: 208-334-8300
District 3 Fax: 208-334-8917
Address: 8150 Chinden Boulevard
Boise, ID 83714-1367
Julie DeLorenzo
Julie DeLorenzo
Board Member
Amy Revis
District Engineer
Email Amy


Safety Service Patrol on I-84 showcases its value in first week of operations

December 16, 2019
It’s Day 2 of operations for the Safety Service Patrol in the I-84 Corridor and the service is showing its value as it cleared a three-vehicle crash quickly during Monday’s morning commute.
Read More

ITD introduces new Safety Service Patrol for I-84 construction zone in Nampa

December 12, 2019
The Idaho Transportation Department is launching a safety patrol and courtesy towing service on Friday to assist disabled vehicles and keep traffic moving safely through the Interstate 84 construction zone in Nampa.
Read More

Ground depression prompts partial closure on Myrtle Street in downtown Boise

October 8, 2019
11:45 a.m. Oct. 8 During boring operations along Myrtle Street in downtown Boise, a depression formed in a travel lane,...
Read More

Property owners approve three of four proposed noise walls near I-84 expansion project in Canyon County

October 7, 2019
The Idaho Transportation Department has collected the votes and is making plans for three new noise walls along Interstate 84...
Read More

Interim signal to be constructed on Idaho Highway 55 at Brookside Lane

October 3, 2019
The Idaho Transportation Department has approved construction of a interim traffic signal at the intersection of Idaho Highway 55 and Brookside Lane
Read More

Intersection closures and girder placement on ID-55 in Marsing Oct. 1, 2019

October 1, 2019
Several intersections on Idaho 55 will be closed beginning Oct. 1
Read More

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

September 10, 2019
The closures will allow crews to safely remove the wooden forms that temporarily supported the new bridge deck this summer.
Read More

ID-55 Snake River Bridge overnight closures during girder placement

August 30, 2019
There will be temporary closures on Idaho Highway 55 at the Snake River Bridge in Marsing while girders are placed for the new bridge.
Read More
1 2 3 9

Construction List

Planning & Design

Projects in Planning or Design Phases

I-84 Project

For information go to: Drive Idaho Podcast

US Routes

State Highways | Idaho Routes

Corridor Plans


Study Information

The purpose of the U.S. 20/26 Corridor Study is to develop a medium range (through 2020) plan that identifies current and future highway needs for more than 14 miles of U.S. 20/26 running from I-84 near Caldwell west to Nyssa, Oregon and the Snake River. The highway overlaps U.S. 95 for eight miles from east of Parma to Anderson Corner Road – the corridor study for that section is addressed in the ongoing U.S. 95 Corridor Study. The Corridor Study is being done to comply with Idaho Transportation Department Board policy, which is also consistent with federal planning guidance. The study and subsequent adopted plan will be used to chart U.S. 20/26 road improvements from I-84 to the state line in the Statewide Transportation Improvement Program (STIP).


The completed plan will include:

  • A 10-year plan for the corridor.
  • Identification of corridor priorities.
  • Identification of existing and projected environmental, roadway, and land use conditions.
  • Analysis of future travel demand and performance in the corridor.
  • Analysis of accidents and recommendation of safety features including access management.
Design Guidelines

Sample urban and rural cross-sections of the highway will be illustrated. Any projected capacity improvements that require a cross-section different from the current samples will also be illustrated.

Features will include:

  • Number of lanes
  • Lane width
  • Shoulder width
  • Side slopes
  • Curb, gutter, and sidewalks for urban cross-sections
Environmental Review

The National Environmental Policy Act (NEPA) requires that an environmental review be completed before right-of-way can be acquired with federal funds. The U.S. 20/26 Corridor Study is not programmed to recommend or fund purchase of right-of-way. Therefore, ITD will not complete a NEPA-level environmental review. However, an Environmental Scan will be conducted to provide a baseline survey which includes a qualitative analysis of the current human environment. The human environment includes aspects of the natural environment, built environment, and human health. Constraints that may have a limiting factor in roadway width and placement of the highway section will also be identified.

Study Background

U.S. 20/26 is a major farm-to-market road serving agriculture and quarrying industries in western Canyon County. Cross-state access is directly provided to Nyssa and connecting access is provided via Highway 18 to Adrian, Oregon. The majority of the highway is two-lane rural with a 65 mph speed limit.


Mark Wasdahl, ITD Project Manager
(208) 334-8344 –

The Idaho Transportation Department (ITD) is studying U.S. 95 from the Idaho border in Owyhee County to Pinehurst at the Adams / Idaho County line. The study will result in a corridor plan that identifies important improvement projects over the next 20 years.

The plan will be published in three parts:

  • North: Weiser River to New Meadows
  • Central: Nyssa Junction with 20/26 to Weiser River
  • South: Oregon State Line to Nyssa Junction with 20/26

U.S. 95 runs north to south through western Idaho. It provides an important north-south international transportation link for long-haul freight between Mexico and Canada.

Within the Idaho Transportation Department’s District 3 boundaries, the highway covers 203 miles from Pinehurst in Adams County to the Oregon stateline south of Marsing in Owyhee County. Recreational travelers and local traffic share the road with long-haul trucks, straining the roadway capacity as surface transportation demand continues to grow.

Project Description

The completed corridor plan will include an analysis of the existing conditions on the highway; a forecast of future demand over the next 20 years; and a list of short and long-term improvements on how to improve transportation on this section of U.S. 95. The document will address the course of the highway as a whole and on a county by county basis. The plan will be based on community input, engineering analysis, and city, county and agency visions for the future. ITD will include the plan in its Idaho Horizons Long Range Capital Improvement and Preservation Program (LRCIP). LRCIP is a planning document that helps ITD prioritize projects for future years.

The finished corridor plan will address:

  • Safety: What are the improvements that will make U.S. 95 safer for motorists, pedestrians and residents?
  • Access Management: How can ITD and local communities manage the effect of development along the corridor so the roadway continues to function safely and efficiently?
  • Traffic: Can we anticipate congestion points and plan for the best ways to improve traffic flow and capacity throughout the corridor?
  • Environment: What are the important environmental issues to consider when ITD seeks to make improvement to U.S. 95 in the future?

The U.S. 95 Corridor Study began in 2007 and is expected to be completed in 2016.

U.S. 95 North Corridor Study

· U.S. 95 North Environmental Scan

U.S. 95 Central Corridor Study

· U.S. 95 Central Environmental Scan

U.S. 95 South Corridor Study

· U.S. 95 South Environmental Scan

ITD encourages you to submit comments at any time during the study process. Written comments may be e-mailed to or mailed to: Idaho Transportation Department, P.O. Box 7129 in Boise, ID 83707-1129. Those with questions about the corridor study can send an e-mail to Adam Rush or call him at (208) 334-8119.

The Idaho Transportation Department (ITD) is studying long-term improvements to Idaho 44 from West State Street in Eagle to Interstate 84 in Caldwell.

This study will result in:

  • A corridor plan with recommended transportation improvements and the needed right-of-way (land) to support these improvements between now and 2045.
  • A Federal Highway Administration (FHWA) Environmental Assessment that outlines how the improvements would impact the environment (i.e., noise, air quality, historic properties, etc.) and how ITD will address the impacts.
  • A project phasing plan that identifies and prioritizes individual projects for future funding.

Environmental Process
The FHWA Environmental Assessment (EA) for this project includes several technical studies that address traffic, access management, drainage, noise, air quality, public involvement and other factors. The EA must be approved by the Federal Highway Administration prior to final design and construction. A public hearing will be held in 2019 before the EA is submitted to FHWA.

Project Background and Schedule

Idaho 44 is the only east-west highway that links Canyon County to Ada County north of the Boise River. As growth and development have increased, ITD is taking a comprehensive approach to address travel time, capacity and safety along this corridor.

Early planning efforts for ID-44 began in 2004 and resulted in a preferred alignment for approximately 16 miles of the corridor. A preferred alignment identifies locations for widening or realigning the roadway in future years. The ID-44 public outreach was a significant component of this early planning process.

ITD’s goal is to complete the ID-44 corridor study in 2019 and immediately begin moving forward with improvements. Public meetings will be scheduled in Ada and Canyon counties later this year.

Questions or comments about the ID-44 corridor study may be directed to Mark Wasdahl, ITD Project Manager, at or (208) 334-8344.

ID 55 RouteThe Idaho Transportation Department (ITD) is studying Idaho 55 to identify current and future needs throughout the corridor. The study will result in three corridor plans (North, Central, South) that identifies policies and projects important to the development of this major arterial over the next 20 years.

To join the project mailing list contact the Idaho Transportation Department Public Involvement Coordinator at P.O. Box 7129, Boise, ID 83707 or emailed to

Public Involvement

ITD hosted public meetings in Cascade, McCall and New Meadows in January 2016.

Project Schedule
  • January 2016 – Hold public meetings to gather input on the North Corridor
  • February 2016 – Finalize Central Corridor Plan
  • Spring 2016 – Draft North Corridor Plan
  • Summer 2016 – Finalize North Corridor Plan

Project Description

The Idaho 55 highway corridor originates 1.7 miles south of Marsing in Owyhee County at the Idaho/Oregon/Nevada junction with U.S. 95 and serves six counties, ending at the junction of U.S. 95 in New Meadows. Most travelers know the highway for its turns along mountain forests, whitewater rapids and favorite recreation spots. The corridor is an important route that supports the regional daily commute, the long-haul trucking industry and recreational traffic.

The completed study will include three separate corridor plans:

  • South Corridor Plan – ION Junction in Owyhee County to Interstate 84 in Canyon County
  • Central Corridor Plan – State Street in Ada County to Banks Lowman Road in Boise County
  • North Corridor Plan – Banks Lowman Road in Boise County to New Meadows in Adams County

Project Materials
North Corridor Plan Public Meetings January 2016

Study Documents

North Corridor Plan (In process)

Draft Central Corridor Plan (Sept. 2015)

South Corridor Plan

Idaho 55, Marsing to Nampa Access Management Plan

Those with questions about the corridor study can send an e-mail to or call Adam Rush at (208) 334-8119.

Accessibility | Title VI | Americans with Disabilities Act (ADA) Compliance

The Idaho Transportation Department (ITD) is committed to compliance with Title VI of the Civil Rights Act of 1964 and all related regulations and directives. ITD assures that no person shall on the grounds of race, color, national origin, gender, age, or disability be excluded from participation in, be denied the benefits of, or be otherwise subjected to discrimination under any ITD service, program, or activity. The department also assures that every effort will be made to prevent discrimination through the impacts of its programs, policies, and activities on minority and low-income populations. In addition, the department will take reasonable steps to provide meaningful access to services for persons with Limited English Proficiency.

TTY/TDD Users: Dial 711 or (800) 377-3529 to use Idaho Relay System

Completed Projects

Southwest Idaho: Construction Projects Completed in 2018

COMPLETE: I-184, Emerald Overpass

  • Preservation work on the Emerald Street overpass of I-184 (the Connector) between Cole Road and Curtis Road.
  • Improvements will protect and preserve pavement life.

COMPLETE: US-20: Front, Myrtle & Broadway in Boise

  • Repaved Front Street, Myrtle Street and Broadway Avenue (US-20) and upgrade ADA ramps
  • Contractor & Construction Cost: $3.1 million. Sunroc

COMPLETE: ID-16 and Beacon Light Intersection Improvements

  • Widening, reconstruction, and drainage improvements were made at the intersection of Beacon Light Rd and ID-16, new traffic signal installation.
  • Contractor & Construction Cost: Knife River, $1.15 million

COMPLETE: ID-69: Kuna to Meridian Pavement Rehabilitation Project

  • Resurfaced ID-69 (Meridian Road) from Orchard Road in Kuna to Overland Road in Meridian.
  • Added traffic signals at Hubbard Road and Lake Hazel Road.
  • Installed a median barrier between Calderwood Drive and Overland Road.
  • Reconfigured lanes at the intersection of Meridian and Overland roads. Northbound Meridian Road includes three through lanes, a dedicated left-turn lane and a dedicated right-turn lane at the intersection.

COMPLETE: Bridge Rehabilitations in Southwest Idaho

  • I-84: Meridian Interchange Overpass, Broadway Overpass, Highland RVRR Underpass, Gowen UPRR Underpass, Gowen Underpass
  • US-20/26: (Broadway Ave) Boise River Bridge
  • Construction budget is $2.7 million. Contractor: Cannon Builders

COMPLETE: ID-52: Sweet/Ola Rd. to Horseshoe Bend pavement rehabilitation

  • Old, deteriorated pavement was milled down and replaced with fresh asphalt.
  • Contractor & Cost: Knife River, $2.6 million

COMPLETE: Bridge Rehabilitations

  • ID-21: Mores Creek, Wildlife Underpass, Grimes Creek, Wildcat Gulch, Stierman Gulch, South Fork Payette, Canyon Creek
  • Contractor: Cannon Builders

COMPLETE: I-84: Exit 33B, Karcher Interchange safety and mobility improvements

Construction included:

  • Elimination of exit 33b and adding lanes at exit 33A/Midland Blvd.
  • Adding a second southbound lane to Midland
  • Add a second left turn lane from Karcher Bypass to southbound Midland Blvd.
  • Upgrade sidewalks and traffic signals

COMPLETE: I-84 Business Loop: Nampa, Northside Blvd. to Grant Ave. Pavement preservation and ADA ramp upgrades

COMPLETE: I-84, Sand Hollow Overpass

  • Bridge Replacement & Pavement Rehabilitation
  • Contractor & Cost: Knife River, $10.5 million.

COMPLETE: I-84: Caldwell signage upgrades

  • Installed overhead and pavement markings to improve on-road communication.
  • Contractor & Construction Cost: Coral Construction Co. $831,000

COMPLETE: US-20/26: Farmway Rd. intersection

  • Provided through lanes east and westbound and a left center turn lane for eastbound traffic turning onto Farmway Rd.
  • Contractor & Construction Cost: Staker & Parson and Idaho Materials & Construction – $405,000

COMPLETE: ID-45: Deer Flat to I-84 B, Pavement rehabilitation

  • Contractor & Cost: Central Paving, $3.2 million

COMPLETE: Mountain Home Chip Seals

Project included:

  • I-84 Business Loop: Exit 90 to Sagebrush Ave
  • US-20: from I-84 exit 95 to Cat Creek Summit (28 miles)
  • ID-51 (American Legion Blvd): from N 2nd St E to 18th St. E

COMPLETE: US-95: Elephant Butte road reconstruction

  • Removed clay material beneath road that is causing major pavement swelling. Work reconstructed the road for a long-term fix to swelling issues.
  • Contractor & Construction Cost: Central Paving Company, $2.6 million

COMPLETE: ID-51 Snake River Bridge Replacement

  • Completed: Summer 2018
  • Contractor & Construction Cost: Cannon Builders, $6.8 million

COMPLETE: I-84: Oregon Stateline to Black Canyon Road (Exit 13) sealcoat

  • Contractor & Contstruction Cost: Kloepfer Inc., $886,000

COMPLETE: US-95, Payette to Weiser River pavement rehabilitation

  • Asphalt was milled and reconstructed for a smooth surface. Turn lanes and slow vehicle lanes were added in select locations to improve safety and mobility.
  • Contractor & Construction Cost: Western Construction $6.1 million

COMPLETE: US-30: Between I-84 and ID-72 pavement rehabilitation

  • The project had two phases. First, the old road was ground and re-laid. Then a seal coat was applied to both this section as well as 2 miles of ID-72 beginning at the Junction of US-30 and extending east. Several sections of guardrail on US-30 was replaced.
  • Contractor & Construction Cost: Western Construction, $2.1 million

COMPLETE: ID-52: Union Pacific Railroad bridge replacement

  • Removed and replaced the existing railroad bridge over SH-52 bridge that did not meet current requirements.
  • Contractor & Construction Cost: Braun-Jensen, Inc., $2.58 million

COMPLETE: ID-55: McCall (Zachary Rd.) to Goose Creek Grade Project – Pavement rehabilitation and guardrail upgrades

  • This project reestablished the riding surface and preserved the structural capacity of the existing roadway. It also increased driver safety by updating some of the guardrail.
  • Contractor & Construction Cost: Valley Paving, $3.2 million

Services | Contacts

For application forms go to ITD Form Finder and then search for “EncroachmentUtility Permits Video

  • Approach Permit application – i.e. driveway, road access, etc. (Right of Way Encroachment Application and Permit Approaches or Public Streets) – Search for form # “2109” or “Encroachment” at ITD Form Finder
  • For the Utility Permit application – (Right of Way Encroachment Application and Permit for Utilities) – Search for form # “2110” or “Encroachment” at ITD Form Finder
  • Other Encroachments application – i.e. signs, banners, etc. (Right of Way Encroachment Application and Permit for Other Encroachments) – Search for form # “2111” or “Encroachment” at ITD Form Finder
  • Milepoint Logs go to the iPlan – Mapping Resource for Idaho highway route information
  • iPlan – Mapping Resource
  • Access Management Informational Brochure

Encroachment Application Office Locations & Contacts

Regional LocationOffice HoursEmailCounties & Contact Information
North Idaho - District 1
600 West Prairie Avenue
Coeur d’Alene, ID 83815
7:00 a.m. to 4:00 p.m. Pacific TimeEmail: Stacy.Simkins@itd.idaho.govCounties: Benewah, Bonner, Boundary, Kootenai, Shoshone - Stacy Simkins, 208-772-1297
North-Central Idaho - District 2
2600 Frontage Rd
Lewiston, ID 83501
7:00 a.m. to 4:00 p.m. Pacific TimeEmail: Shane.Niemela@itd.idaho.govCounties: Clearwater, Idaho, Latah, Lewis, Nez Perce - Shane Niemela, 208-799-4239
Southwest Idaho - District 3
8150 Chinden Boulevard
Boise, ID 83714
8:00 a.m. to 5:00 p.m. Mountain Time
Payments are not accepted after 3:00 p.m.
Payment Phone Line:
Email: ITDD3Permits@itd.idaho.govCounties: Ada, Elmore, Gem, Boise, Valley - Shona Tonkin, 208-334-8341

Counties: Canyon, Adams, Owyhee, Payette, Washington - Tyson McCoy, 208-338-8335
South-Central Idaho - District 4
216 South Date Street
Shoshone, ID 83352
8:00 a.m to 5:00 pm Mountain TimeEmail: Deb.Pierson@itd.idaho.govCounties: Blaine, Camas, Cassia, Gooding, Jerome, Lincoln, Minidoka, Twin Falls - Deb Pierson, 208-886-7839
Southeast Idaho - District 5
5151 S. 5th Ave
Pocatello, ID 83204-2202
8:00 a.m to 5:00 pm Mountain TimeEmail: D5EncroachmentPermits@itd.idaho.govCounties: Bannock, Bear Lake, Bingham, Caribou, Franklin, Oneida, Power - Phone: 208-239-3300
East Idaho - District 6
206 North Yellowstone
Rigby, ID 83442
8:00 a.m to 5:00 pm Mountain TimeEmail: Troy.Despain@itd.idaho.govCounties: Bonneville, Butte, Clark, Custer, Fremont, Jefferson, Lemhi, Teton, Madison - Troy Despain, 208-745-5644
Idaho Transportation Department Headquarters - Boise, IDUtility Permits

Sign Permits
Barbara Waite, 208-334-8522

Justin Pond, 208-334-8832

Roadway Sign Request Contacts

Idaho Transportation Department, District 3 Office
Address: 8150 Chinden Boulevard, Boise, ID 83714-1367

District 3 Phone: 208-334-8300
District 3 Fax: 208-334-8917

Media Contact: Jake Melder | 208-334-8874

Accessibility | Title VI | Americans with Disabilities Act (ADA) Compliance

The Idaho Transportation Department (ITD) is committed to compliance with Title VI of the Civil Rights Act of 1964 and all related regulations and directives. ITD assures that no person shall on the grounds of race, color, national origin, gender, age, or disability be excluded from participation in, be denied the benefits of, or be otherwise subjected to discrimination under any ITD service, program, or activity. The department also assures that every effort will be made to prevent discrimination through the impacts of its programs, policies, and activities on minority and low-income populations. In addition, the department will take reasonable steps to provide meaningful access to services for persons with Limited English Proficiency.

TTY/TDD Users: Dial 711 or (800) 377-3529 to use Idaho Relay System