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To learn more about the Environmental Process or for specific questions, please go to the ITD Environmental Process Manual.

There are more than 40 federal and state environmental laws that affect transportation decisions. A unifying federal environmental law is the National Environmental Policy Act of 1969 (NEPA), which provides a framework for addressing the various environmental statutes, regulation and policies. NEPA is a procedural statute (40 CFR sec 1500) for decision-making during federal projects to assure analysis of social, economic and ecological impacts. ITD is required to provide a NEPA document for projects that are federally funded through the Federal Highway Administration (FHWA).

NEPA Requirements

  • Study a reasonable range of alternatives based on “Purpose and Need”
  • Use a systematic, interdisciplinary approach while evaluating environmental factors during the planning process
  • Widespread interagency coordination, review, and consultation
  • Documentation of the environmental analysis process in plain language
  • Provide the public opportunity to participate and comment throughout the process

NEPA Training

Three Types of NEPA Documents
Environmental Evaluation (EE) – is an ITD document approved by the Idaho Division of FHWA for Categorical Exclusion (Cat. X) decision-making or auditing purposes.

  • Examination of project concept and location regarding potential for socioeconomic or ecological impacts
  • Determination of impact significance

Environmental Assessment (EA)

  • Unsure if significant impacts
  • Evaluation of key resources
  • Finding Of No Significant Impact (FONSI)

Environmental Impact Statement (EIS)

  • Significant Impacts
  • More detailed evaluation
  • Record Of Decision (ROD)

ITD Environmental Process Flow Chart
Environmental Process Manual
ITD-654 Form


Resource Areas

Air Quality impacts are evaluated for all Idaho Transportation Department (ITD) federally funded transportation projects to determine if the project will cause or contribute to a violation of National Ambient Air Quality Standards. ITD’s mission is to improve air quality by ensuring all ITD projects and operations comply with federal, state and local air quality laws and regulations, and by promoting strategies which reduce emissions of motor vehicle pollutants.

ITD Air Screening Policy (Nov/Dec 2007)

 I-84 at Eagle Interchange
I-84 at Eagle Interchange

Cultural resource investigations involve documentation, interpretation, and preservation of prehistoric/historic archaeological sites, historic structures and traditional cultural properties that are evaluated as eligible for the National Historic Register. ITD’s policy is to either avoid adverse impacts to cultural resources or to minimize and mitigate the impacts for all projects requiring ground disturbance.

ITD is required by federal regulations in Section 106 of the National Historic Preservation Act (NHPA) of 1966 and Section 4(f) of the Department of Transportation Act of 1966, to assess the historic resources prior to potential impacts related to transportation construction and maintenance activities.

Section 106 Review Requires:

  • Identification of historic properties that may be affected by the proposed transportation projects and resolves such conflicts
  • Consulting with the State Historic Preservation Office (SHPO), the Tribal Preservation Offices (THPO), and other interested persons/parties during the early stages of planning and throughout the project
  • Preparing cultural resource analysis describing each cultural resource, its specific location and potential impacts to it from the project
  • Completing the “Determination of Significance and Effect” form (ITD-1502) with SHPO concurrence

Section 4(f) Evaluation Requires:

  • Analysis of impacts to cultural resources on or eligible for the National Register of Historic Places (historic sites, bridges, archaeological resources) and impacts to public parks, recreation areas, and, wildlife and waterfowl refuges, resulting from transportation projects
  • Identifying the resources being used by a project and examining alternatives to avoid that use

Rainbow Bridge, Smith Ferry, Idaho

Additional information and guidance concerning Cultural Resources Investigations can be found at the following links:

The Idaho Transportation Department must conduct hazardous materials investigations for any property ITD owns, manages, plans to sell, or plans to purchase. If hazardous materials are found to be present on ITD property, federal and state environmental laws requires ITD to cleanup and properly dispose of all hazardous materials regardless of whether the original source is from ITD activities, from a tenant, or inherited when property is acquired.

ITD seeks to identify hazardous materials early in the project development process through thorough investigations to reduce liability and to minimize delays. Advantages to this identification process include:

  • Minimizing potential dangers to ITD and other personnel
  • Protecting the environment from exposure to or spread of hazardous materials
  • Minimize design and construction costs due to potential project delay or termination
  • Reduce adverse publicity

Storage Tank – I-84 Connector Project

Abandoned Drums – Nampa, ID

HazMat Investigations are conducted in the following steps:

Administrative Review – (Required on all projects – ITD 652 Form)

  • Published lists are reviewed to determine if there are any documented HazMat sites, underground storage tanks or contaminated ground water in/near the project area
  • A windshield survey and interviews are performed
  • Selected resource agencies are contacted
  • If there is a potential impact, a Phase I or Phase 2 must be completed

Initial Site Assessment – (Phase I)

  • Determines whether there is a potential HazMat risk
  • Complete a Records Review of maps and historic documents to obtain information to help identify hazardous environmental conditions
  • Perform a Site Reconnaissance to inspect property and any structures on the project for recognized hazardous environmental conditions
  • Conduct Interviews with property owners or site managers to obtain information about possible hazardous environmental conditions that confirms information previously obtained or identifies new information

Preliminary Site Investigation – (Phase II)

  • Confirm whether HazMat is present and extent of contamination
  • Soil and water samples taken and analyzed
  • Reports written to discuss physical environment and its relationship to potential contamination, sampling techniques, analysis results, health and safety considerations, identification of any contamination if found, conclusions, and remediation strategy and costs

Detailed Site Investigation – (Phase III)

  • Conducted when existence of HazMat on the project site is confirmed
  • Includes the Site Investigation, Remedial Action Plan and remediation
  • Approximate clean up time can vary from 6 months to several years
  • Authorization of a Phase III investigation will be coordinated through the Headquarters Environmental Section Manager

Additional information can be found under “1400 Hazardous Materials” in the ITD Environmental Process Manual

Tank Oil Spill – North of Smith Ferry, ID

Traffic Noise is increased by heavier traffic volumes, higher speeds and a greater percentage of trucks. ITD environmental studies involving major highway improvements must analyze existing noise levels and predict future noise levels to determine noise impacts. All traffic noise studies prepared for ITD projects must adhere to procedures and requirements as established by federal law, Federal Highway Administration (FHWA) regulations, and ITD noise analysis guidelines.

Noise Forms

Additional information concerning the Noise Policy can be found under “1300 Noise” in the ITD Environmental Process Manual

Noise Barrier / Sound Walls along I-84
Noise Barrier / Sound Walls along State Highway 55


Yellow Billed Cuckoo

Steelhead Trout

MacFarlane’s four-o’clock

Canada Lynx

The program examines highway impacts on species listed under the federal Endangered Species Act (ESA) and works with the Idaho Fish and Game, Fish and Wildlife Service (USFWS), Forest Service, Bureau of Land Management, and others for the purpose of preserving, protecting, and enhancing the state’s natural resources while operating, maintaining, and improving the state’s transportation system.

Wildlife, fish, and sensitive plants require consideration during project planning and development. Areas of concern include:

  • Interference to wildlife functions such as wintering, foraging, migration, breeding and/or rearing
  • Effects related to collisions between vehicles and animals
  • Loss of animal or plant populations
  • Noise disturbance or loss of habitat


See also the ITD Environmental Process Manual, Section 1000
The Cooperative Agreement with ITD, FHWA and USFWS for Biological Evaluations/Assessments is found in the ITD Environmental Process Manual. Go to the end of the Table of Contents links for Section 300 and find Exhibit 300-6, Programmatic Agreement.

Wildlife Crossing Database is an innovative tool that identifies the proximity of wildlife safety hazards. This tool was honored as the 2009 recipient of the Exemplary Ecosystem and Exemplary Human Environment Initiatives presented by the Federal Highway Administration.
FHWA Award

For more road ecology information, please see the FHWA Wildlife Crossing Guide. This document prepared by the Western Transportation Institute is a handbook for design and evaluation of wildlife crossing systems in North America.

Archived Information
Gray Wolf – FHWA Programmatic Determination

Wetlands – Section 404 of the Clean Water Act

Wetlands generally include swamps, marshes, bogs, and similar areas that are saturated by surface or groundwater and supports vegetation adapted for life in saturated conditions. They provide important functions including groundwater recharge, erosion control, shoreline stabilization, and fish and wildlife food and habitat.

Two Categories of Wetlands:

  • Jurisdictional wetlands contain surface waters that have a connection to “Waters of the US”
  • Non-Jurisdictional wetlands do not have a connection to “Waters of the US”

ITD’s policy is to avoid any activities that adversely affect wetlands during the design, construction, and maintenance of transportation projects. Appropriate action is taken to minimize and mitigate impacts that cannot be avoided.

Section 404 Permit – Required for discharging, dredging, or placing fill material within “Waters of the US” including wetlands to prevent quality degradation and overall loss of wetlands. Administered by the US Army Corps of Engineers (USACE).

Link to Regulations
Clean Water Act, Section 404

Links to Guidance:

Links to US Army Corp of Engineers (USACE) / Walla Walla District Information:

Link to FHWA Site:
FHWA Wetlands Publication Links



Stormwater means stormwater runoff, snow melt runoff, surface runoff and drainage. Stormwater runoff may pick up and transport sediment, oil, and other pollutants. If not managed properly these pollutants can affect the quality of surface waters making them unsafe for drinking, fishing, swimming, or other activities.

Clean Water Act (CWA)
In 1972, Congress passed the Federal Water Pollution Control Act Amendments “to restore and maintain the chemical, physical, and biological integrity” of the Nation’s waters. The Clean Water Act (CWA) is a 1977 amendment to the Federal Water Pollution Control Act of 1972. The CWA set the basic structure for regulating discharges of pollutants to waters of the U.S.

National Pollution Discharge Elimination System (NPDES)
The NPDES permit program was introduced in 1972 and regulates discharges to “waters of the U.S.” Any discharge from a “point source” into a “waters of the U.S.” must have an NPDES permit. Stormwater discharges are regulated by NPDES permits. NPDES permits contains limits on allowed discharges, monitoring and reporting requirements, and other provisions to ensure that discharges do not harm water quality or public health. See EPA website for additional information

Idaho Transportation Division of Highways (ITD) has coverage under three different types of NPDES permits, including:

  • Construction General Permit (CGP) – Construction activities that disturb greater than one acre of land and have the potential to discharge stormwater to a waters of the U.S.
  • Municipal Separate Storm Sewer Systems (MS4)- Stormwater drainage from roads or property that drain into stormwater conveyance systems owned by the state, a city, a town, a village, a public university, a public hospital, a military base, a correctional facility or other public entity that discharges to waters of the U.S.
  • Multi-Sector General Permit (MSGP)- Industrial activities that have the potential to discharge stormwater to a waters of the U.S., including sand and gravel mining. All EPA covered industrial activities are listed in Appendix D of the MSGP.

The following forms are located on ITD’s Form Finder web page.
Use the numbers below to search and download the current ITD Form.

Construction General Permit (CGP) Projects (SWPPP)
ITD-2784 Form – Stormwater Site Assessment (for Design)
ITD-2741 Form – Construction Stormwater Site Evaluation Worksheet
ITD-2950 Form – SWPPP Template: ITD-based Format
Stormwater Runoff Action Items Tool

Non-CGP Projects (PPP)

ITD-2788 Form – Plan Template

Contractor Notes (CN)
CN General Turbidity
CN Winter Shutdown
CN Construction General Permit
CN Erosion and Sediment Control

Click to go to the ITD Form Finder

The following forms are located on ITD’s Form Finder web page.
Use the numbers below to search and download the current ITD Form.


ITD-2802 Form – Stormwater Compliance Inspection Form (CGP Projects)
ITD-2960 Form – LHTAC Transfer of SWPPP Inspection Responsibility
    • 2960 Instructions and Inspection Procedures
ITD-2790 Form – Notice of Potential Violation of CGP or Notice of Prohibited Discharge

SWPPP Management
SWPPP Management Process Overview
ITD-2950 Form- SWPPP Template, ITD-based Format
ITD-2951 Form – Contractor or Local Entity CGP Signature Authority
ITD-2952 Form – ITD Delegation of CGP Signature Authority
ITD-2953 Form – Corrective Action Reporting Tables
ITD-2954 Form – Subcontractor Certification of SWPPP
ITD-2955 Form – SWPPP Modification Log
ITD-2956 Form – Grading and Stabilization Activities Log
ITD-2957 Form – Signature Sheet (Modifications and/or Corrective Action Reports)
ITD-2958 Form – SWPPP Training Log
ITD-2961 Form – Contractor Request to File Notice of Termination

Non-CGP Projects (PPP)
ITD-2786 Form – Construction Site Inspection Report
ITD-2789 Form – Stormwater Document Change Request

Click to go to the ITD Form Finder

ITD projects with NPDES CGP coverage require an Inspector with current ITD Environmental Inspection Training and a Contractor representative inspector with current ITD-approved Water Pollution Control Manager Training.

Water Pollution Control Management Training (WPCM)
Course Length: 16 Hours
ITD requires all Contractors to designate a Water Pollution Control Manager (WPCM). The WPCM must attend an ITD certified 16 hour stormwater management training course. This course has been developed to align with the 2017 CGP. Offerings are available at the following link.

AGC WPCM Training:

NPDES Stormwater Inspector Requalification

If your ITD Inspector Qualification for the NPDES Stormwater was obtained under the 2012 EPA CGP through WPCM reciprocity, it was only valid through the length of the 2012 CGP as stated on the ITD Inspector certificate of completion. ITD is requiring all individuals who want to maintain their Inspector certification to receive training on the 2017 permit. To do so, an individual holding an existing WPCM certificate of completion may choose one of two options as explained in the NPDES Requalification document.

Consultants – Construction Engineering & Inspection – Stormwater Inspector

To certify, complete the ITD Construction Stormwater Management Training course – or – the Idaho Association of General Contractors (AGC) Water Pollution Control Management Training course (see above). Those who complete the AGC course must also submit an Inspector Qualification Registration Form-2905, found in the ITD’s Contract Administration (CA) Manual, Section 114, and a copy of their WPCM course completion certificate to:

Idaho Transportation Department
Attention: Training & Development
P. O. Box 7129
Boise, Idaho 83707-1129

ITD Stormwater Training

For people external to ITD, please contact Wendy Terlizzi at 208-334-8629

ITD Construction Stormwater Management Training
Course Length: 16 hours initial, 8 hours refresher
This course is the Stormwater Management training for Construction Engineers and their management and inspection staff, as well as maintenence staff.
ITD Designer Stormwater Training
Course Length: 16 hours
This course is the Stormwater Management training for Project Development, Design Engineers and their support staff.

Municipal Separate Storm Sewer Systems (MS4) Permits
In some cases ITD is listed as a co-permittee with local municipalities that share or are connected to the same MS4 conveyance system.

Annual MS4 Permit Reports
Annual reporting is required for MS4 permit holders. Contact Wendy Terlizzi to request any supporting documentation.

Phase II – District 1

Municipal Separate Storm Sewer Systems (MS4) Permits
In some cases ITD is listed as a co-permittee with local municipalities that share or are connected to the same MS4 conveyance system.

Annual MS4 Permit Reports
Annual reporting is required for MS4 permit holders. Contact Wendy Terlizzi to request any supporting documentation.

Phase I – District 3

Phase II – District 3

Municipal Separate Storm Sewer Systems (MS4) Permits
In some cases ITD is listed as a co-permittee with local municipalities that share or are connected to the same MS4 conveyance system.

District 5: Permit no. IDS-028053

Annual MS4 Permit Reports
Annual reporting is required for MS4 permit holders. Contact Wendy Terlizzi to request any supporting documentation.

Phase II – District 5
2015-2016 Annual Report
2014-2015 Annual Report
2013-2014 Annual Report
2012-2013 Annual Report
2011-2012 Annual Report
2010-2011 Annual Report
2009-2010 Annual Report
2008-2009 Annual Report
2007-2008 Annual Report
2006-2007 Annual Report

Municipal Separate Storm Sewer Systems (MS4) Permits
In some cases ITD is listed as a co-permittee with local municipalities that share or are connected to the same MS4 conveyance system.

District 6: Permit no. IDS-028070

Annual MS4 Permit Reports
Annual reporting is required for MS4 permit holders. Contact Wendy Terlizzi to request any supporting documentation.

Phase II – District 6
2016-2017 Annual Report
2015-2016 Annual Report
2014-2015 Annual Report
2013-2014 Annual Report
2012-2013 Annual Report
2011-2012 Annual Report
2010-2011 Annual Report
2009-2010 Annual Report
2008-2009 Annual Report

BMP Manual

Temporary and Construction Site Best Management Practices
Chapter 1 – Erosion Control Best Management Practices (entire chapter)


Chapter 1 Introduction
Chapter 1 Matrix
EC-1 Scheduling-Sequencing of Construction Activities
EC-2 Preservation of Existing-Natural Vegetation
EC-3 Coffer Dam
EC-4 Diversion Channels-Ditches
EC-5 Slope Drains
EC-6 Hydraulic Mulch
EC-7 Hydroseeding
EC-8 Soil Binders
EC-9 Straw Mulch
EC-10 Wood Mulching
EC-11 Geotextiles, Plastic Covers & Erosion Control Blankets-Mats
EC-12 Vegetation-Seeding
EC-13 Dust Control
EC-14 Wind Erosion Control
EC-15 Snow Management
Chapter 2 – Sediment Control Best Management Practices (entire chapter)


Chapter 2 Introduction
Chapter 2 Matrix
SC-1 Dikes and Berms
SC-2 Check Dam
SC-3 Gravel Bag Berms
SC-4 Street Sweeping and Vacuuming
SC-5 Sandbag Barrier
SC-6 Inlet-Outlet Protection
SC-7 Silt Fence
SC-8 Fiber Rolls
SC-9 Sediment-Desilting Basin
SC-10 Sediment Trap
SC-11 Temporary Construction Entrance
SC-12 Temporary Roads
SC-13 Entrance-Outlet Tire Wash
Chapter 3 – Non-Stormwater Best Management Practices (entire chapter)


Chapter 3 Introduction
Chapter 3 Matrix
NS-1 Water Conservation Practices
NS-2 Dewatering Operations
NS-3 Paving and Grinding Operations
NS-4 Temporary Stream Crossing
NS-5 Clear Water Diversion
NS-6 Illicit Connection or Discharge
NS-7 Potable Water-Irrigation
NS-8 Vehicle and Equipment Cleaning
NS-9 Vehicle and Equipment Fueling
NS-10 Vehicle and Equipment Maintenance
NS-11 Pile Driving Operations
NS-12 Concrete Curing
NS-13 Material and Equipment Use Over Water
NS-14 Concrete Finishing
NS-15 Structure Demolition-Removal Over or Adjacent to Water
NS-16 Freeze Reduction
Chapter 4 – Waste Management Best Management Practices (entire chapter)


Chapter 4 Introduction
Chapter 4 Matrix
WM-1 Staging and Materials Site Management
WM-2 Material Delivery and Storage
WM-3 Material Use
WM-4 Stockpile Management
WM-5 Spill Prevention and Control
WM-6 Solid Waste Management
WM-7 Hazardous Waste Management
WM-8 Contaminated Soil Management
WM-9 Concrete Waste Management
WM-10 Sanitary-Septic Waste Management
WM-11 Liquid Waste Management
WM-12 Fertilizer Storage and Discharge Mangement
Permanent and Post-Construction Best Management Practices
Chapter 5 – Post Construction Best Management Practices (entire chapter)


Chapter 5 Introduction
PC-1 Channel Protection-Check Dams
PC-2 Sheet Flow to Buffers
PC-3 Channel Protection-Flexible Channel Liners
PC-4 Channel Protection-Rigid Channel Liners
PC-5 Dikes and Berms
PC-6 Dry Swale
PC-7 Wet Swale
PC-8 Geosynthetics
PC-9 Surface Sand Filter
PC-10 Subsurface Sand Filter
PC-11 Perimeter Sand Filter
PC-12 Organic Filter
PC-13 Pocket Sand Filter
PC-14 Bioretention
PC-15 Inlet-Outlet Protection
PC-16 Interceptor Ditches
PC-17 Retaining Walls
PC-18 Stormwater Basins
PC-19 Extended Detention Basin with Micropool
PC-20 Wet Basin
PC-21 Wet Extended Detention Basin
PC-22 Shallow Wetland
PC-23 Extended Detention Shallow Wetland
PC-24 Pond-Wetland System
PC-25 Pocket Wetland
PC-26 Sediment Control Box
PC-27 Infiltration Trench
PC-28 Infiltration Basin
PC-29 Slope Drains-Chutes-Flumes
PC-30 Rock Armor-Rock Mulch-Turf Reinforced Mats
PC-31 Serrations and Roughening
PC-32 Terraces and Benches
PC-33 Topsoil Management
PC-34 Vegetation-Seeding
PC-35 Vegetation-Planting
PC-36 Water Quality Inlet Oil-Grit Separator
PC-37 Street Sweeping
PC-38 Deep Sump Catch Basin
PC-39 On-Line Storage in Storm Drain Network (Vaults)
PC-40 Porous Pavements
PC-41 Proprietary-Manufactured Systems
PC-42 Aggregate Armor
Chapter 6 – Glossary of Terms


BMP Manuals Updates/Changes
ITD Best Management Practice Manual Change Request Form



The HQ Environmental staff is extensively involved in all environmental policy-making decisions, reviews all environmental documents, and provides the Districts with support, training, and expertise to address the wide variety of environmental concerns. Below are the specialists at ITD Headquarters who will help you with your questions regarding the transportation department’s Environmental Program.

HQ Office – Boise on State St.
Wendy Terlizzi Env. Section Manager (208) 334-8629
Megan Vaudrin Administrative Assistant (208) 334-8480
Melinda Lowe Sr. Env. Planner, Projects (208) 334-4474
Michele Fikel Sr. Env. Planner, Projects (208) 334-8478
Victoria Jewell Guerra Sr. Env. Planner, Projects (208) 334-8588
Aimee Hill Sr. Env. Planner, Programs (208) 334-8030
Marc Munch State Hwy. Archaeologist (208) 334-8449
Tracy Schwartz Architectural Historian (208) 334-8412

The District staff has knowledge in a broad range of areas including environmental analysis, threatened and endangered species, traffic noise, air quality, stormwater, wetlands mitigation, and permitting. They work directly with local, state, and federal agencies, along with the public in avoiding or minimizing project impacts. The planners prepare and coordinate environmental documents in compliance with NEPA. Below are the Environmental specialists located at the six districts of the Idaho Transportation Department (ITD).

District 1 – Coeur d’Alene Office
Mike Hartz Sr. Environmental Planner (208) 772-8018
District 2 – Lewiston Office
Shawn Smith Sr. Environmental Planner (208) 799-4268
Neal Scott Environmental Planner (208) 799-4250
District 3 – Boise Office on Chinden Blvd.
Greg Vitley Sr. Environmental Planner (208) 334-8952
Chris Branstetter Environmental Planner (208) 334-7192
Scott Rudel Environmental Planner (208) 334-8329
District 4 – Shoshone Office
Connie Jones Sr. Environmental Planner (208) 886-7824
Dan Armstrong Environmental Planner (208) 886-7832
District 5 – Pocatello Office
Alissa Salmore Sr. Environmental Planner (208) 239-3312
Chuck Heisler Environmental Planner (208) 239-3355
District 6 – Rigby Office
Tim Cramer Sr. Environmental Planner (208) 745-5602