Environmental

ITD projects with federal funding, permitting, or land are required by Section 106 of the National Historic Preservation Act of 1966, and implementing regulations 36 CFR 800 to take into account the effects of project actions on historic properties. During this process ITD Cultural Resources staff define the Area of Potential Effect, make a good and reasonable faith effort to identify historic properties within that area, and assess any potential effects of the project on those properties. This process is completed in consultation with the Idaho State Historic Preservation Officer (SHPO), Tribal Historic Preservation Officers (THPO), Native American Tribes, local historic preservation commissions, and other interested parties.

For more information on the ITD Section 106 process, please refer to the Cultural Resources chapter of the Environmental Procedures Manual.

• Cultural Resources Programmatic Agreement

Those ITD projects with funding or approval from the Federal Highway Administration must also meet requirements of Section 4(f) of the Department of Transportation Act of 1966. Please see the Section 4(f) chapter of the Environmental Procedures Manual for more information on this process.

Archaeology is the study of past human activity through the recovery and analysis of material culture. The archaeological record consists of artifacts, ecofacts, features, and cultural landscapes which have been used by people of the pasts.

Archaeologists precisely record where all the clues of the past are found so they may reconstruct living surfaces, which may include house remains, fire-hearths, and refuse or garbage pits. Once the artifacts and their contexts are fully studied, researchers attempt to explain how past peoples and societies made a living and adjusted to changing social and environmental circumstances. Here are some examples of archaeological resources that ITD projects might encounter:

• Artifacts: stone tools, bone, ceramics, glass, and metals
• Ecofacts: animal bones, charcoal, plants, and pollen
• Features: fire hearths, refuse areas/trash dumps, rock art

Once an archaeological site has been identified, archaeologists use the National Register of Historic Places criteria to determine if it the property has historic significance and can still convey it. Archaeologists determine if the property is associated with an important historic event or if it can yield more information about the past. Archaeologists complete a detailed recording of the site, document the site using photography and sketch maps, and conduct in-depth analysis of any artifacts, ecofacts, and features that are present to better understand how these were used by people of the past. ITD uses archaeologists to document sites that might be impacted by projects, determine if they have significance, and assess what impacts project actions might have on those properties.

Society for Historical Archaeology (SHA): ITD receives the Award of Merit for the Sandpoint Archaeology Project

Architectural history is the study of the built environment and how surroundings can impact our lives. Certain properties remind us of our history and shared past. Here are some examples of architectural resources that ITD projects might encounter:

• Buildings: private residences, commercial properties, barns, schools, and courthouses
• Structures: bridges, roads, and irrigation canals
• Objects: monuments and boundary markers
• Sites: parks and cemeteries
• Districts: downtown Main Streets and residential neighborhoods

Once an architectural resource has been identified, architectural historians use the National Register of Historic Places criteria to determine if it the property has historic significance and still has the physical features necessary to convey that significance. Usually these properties are at least fifty years old. Architectural historians determine if the property is associated with an important historic event or person; has a distinctive design, style, or construction; or if it can yield more information on the past. They also ask if the location, design, setting, materials, workmanship, association, and feeling of the property helps that property convey its significance to the general public. Architectural historians complete detailed written descriptions of the property, document the property using photography and sketch maps, and conduct in-depth archival research to better understand the local, state, or national significance of the property. ITD employs architectural historians to document properties that might be impacted by projects, determine if they have significance, and assess what impacts project actions might have on those properties.

In 2008, ITD was awarded the Excellence in Historic Preservation award from Preservation Idaho for their work on the Idaho 55 Rainbow Bridge.

Historic Survey of Roads in Idaho’s State Highway System

This multi-volume publication illuminates the history and evolution of Idaho’s highway transportation network. These volumes have been developed as a way for the public and consultants to better understand the history surrounding Idaho’s state highway network, the individual highways, and to provide a consistent interpretation in applying National Register of Historic Places (NRHP) criteria to evaluate the significance, integrity, and eligibility of the current roads within this road system.

Volume 1 is the Historic Context and Volume 2 is the Application of the National Register of Historic Places Criteria for Evaluation. Volume 3, currently in development, will document individual highways and their specific history and assess their NRHP eligibility.

• Volume 1 – Historic Survey of Roads in Idaho’s State Highway System: Historic Context
• Volume 2 – Historic Survey of Roads in Idaho’s State Highway System: Application of the National Register of Historic Places Criteria for Evaluation

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Idaho is a geographically, economically, and culturally diverse state. Our transportation system represents the shared history that helps to unite us. ITD has worked with consultants and local communities to prepare informative publications and resources about transportation history in the Gem State.

• The Weiser River Trail: To the Golden Heart of Idaho – This pamphlet summarizes the history of the Pacific and Idaho Northern Railroad and Weiser River Trail, Idaho’s Longest Rail-Trail, located in Adams and Washington Counties.
• Blaine County Transportation: A History of Bridges and Roadways in Blaine County, Idaho – This document identifies historic vehicular bridges in Blaine County and how these resources relate to the historic transportation infrastructure in the central Idaho.
• Marsing Oral History Project | “No Bridge, No Town” – Oral Histories on the Historic Snake River Bridge and the Town of Marsing: Agreed upon as an appropriate mitigation for the adverse effect to the historic Snake River Bridge near Marsing, Idaho, these interviews were conducted by the Owyhee County Historic Preservation Commission to preserve both the history of the bridge and life in early twentieth century Marsing.
• Idaho Transportation Photo Collection: This collection of over 30,000 images documents the rich history of transportation and infrastructure development in Idaho. The online, searchable database is free to the public.
• Idaho’s Highway History 1863-1975: Written in 1985 this document provides a brief synopsis of transportation in Idaho, including the history of the Idaho Transportation Department.
• The Other Side of Sandpoint – Early History and Archaeology Beside the Tracks: The Sandpoint Archaeology Project (2006-2013) was one of the largest historic archaeology projects in the western United States, and the largest archaeology project ever completed in the state of Idaho. It resulted in the recovery of over 600,000 artifacts associated with the early history of Sandpoint, Bonner County, Idaho. The four volumes include:
  1) Sandpoint Stories
  2) Material Culture of Everyday Life
  3) The Ethnography and Prehistory of Sandpoint (upon request), and
  4) Summary of Methods and Data.
• Research Guide on Snake River Ferries: This document captures the history of ferry crossings and pioneer travel throughout Idaho’s Snake River region, including links to additional research materials on ferry crossings.
• US-95, Meadows Valley Transportation Corridor: Learn about the history of transportation routes and modes connecting Meadows Valley to Riggins.
• Steel Bridges in Eastern Idaho: Once commonplace but now rare, steel bridges in eastern Idaho heavily influenced the development and settlement of the region.
• History of Grace Dam Power Plant: One of three hydroelectric power plants in Caribou County, the Grace Dam Complex – including the dam, power plants, and penstocks – was built in 1906 and is still operational today, providing power to southern Idaho and northern Utah.
• From Forest to Field – Agriculture in Bonner County: Developed as mitigation for the adverse effect to a farmstead, this document is a detailed look at the agricultural industry in Bonner County. Visit the Bonner County History Museum to see this material on exhibit.

ITD has worked with local communities and historians to develop and install interpretative panels throughout the state.

Here are some interpretive signs you can see during your travels.

• Located about a half mile north of Grace, Caribou County, Idaho just on State Highway 34, are a handful of interpretive signs on the history of the Grace Dam Power Plant. Two, developed by ITD and the Local Highway Technical Assistance Council, share the history of the Turner Road Penstock Bridge and L.L. Nunn, the builder of the Grace Dam Power Plant.
• Located at the Rotary Park in McCall, Valley County, Idaho off of State Highway 55, are two signs about the history of the Lardo Bridge Crossing and Charles A. Kyle, one of Idaho’s most influential bridge engineers.
• Located on the south remnant of the Kootenai River Bridge in Bonners Ferry is an interpretive sign on Kootenai River crossings. Also in Bonners Ferry, installed near Bonners Ferry City Hall and in the vicinity of the Fairbanks Morris Generator, are two signs on the history of power and electricity in the region.
• Located along the Boise Greenbelt near Broadway Bridge in Boise, Ada County are multiple interpretive panels telling the history of crossing the Boise River and how it has impacted development and settlement. Thank you to the Boise City Department of Arts & History for providing these images.
• Located at the intersection of Railroad Avenue and Bridge Street in Sandpoint, Bonner County, are two signs documenting the history of the Northern Pacific Railroad in northern Idaho and its impact on the community of Sandpoint.
• Located at the Horseshoe Park in New Plymouth, Idaho along the route of US Highway 30, are six signs about the history of the William E. Smythe, the founding of New Plymouth, irrigation in the Payette Valley, and individuals important to the history of New Plymouth.

Idaho Transportation Department (ITD) – Key No. 19134:
US-93, 100 South Road, Jerome County
Appeal to the Advisory Council on Historic Preservation (ACHP)

• 19134 – Jerome | FHWA letter to ACHP, DRAFT REVIEW
• SHPO Submittal Letter
• Report+Attachments+Site Forms
• Memo Report 100 South (to SHPO) 6-14-2019
• SHPO Determination Letter – Adverse Effect
• District 4 – 19134 SHPO Memo Letter, FINAL signed
• SHPO Response 12-17-2019 | Re-Evaluation 100 South Road, Jerome County | SHPO Rev. 2019-689
• 19134 Project Information

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

Links to Regulations and Guidance:

• https://www.fhwa.dot.gov/environment/air_quality/

Idaho DEQ pages:

• https://idahodeq.maps.arcgis.com/apps/instant/minimalist/index.html?appid=f906aea7fcc846c1ac9eedf889d62607
• https://www.deq.idaho.gov/air-quality/improving-air-quality/priority-areas/

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 with the exception of Tier I Minor Projects)

• Use the Terradex Idaho site to conduct a project area “radius search”, with the search radii below in mind (a 1-mile radius is recommended).
  • This is intended as a review of published lists to determine if there are any documented HazMat sites, underground storage tanks or contaminated groundwater within or adjacent to the project area.

• Review the topography, groundwater levels and flows in the project area.
• Determine whether the site conditions warrant further investigation.
• Where warranted, the appropriate resource agencies are contacted (contact information is provided on the Terradex map at each site)
• If there is a potential risk, 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

• Noise Barrier Abatement Checklist ITD-1055 Form
• Noise Abatement Decision Checklist ITD-1056 Form
• Optional Non-Barrier Noise Abatement Checklist ITD-1057 Form

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

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

 

Water of the U.S., Wetlands, Floodplains and Floodways, Wild and Scenic Rivers and Sole Source Aquifers

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
• Idaho DEQ Clean Water Act, Section 401 Water Quality Certification

Links to Guidance:

• ITD Environmental Process Manual
• Navigable Waters of the State list
• Programmatic Wetland Finding for Categorical Exclusions
• Wild and Scenic Rivers – FHWA Idaho Division Office Guidance

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

• Aquatic Resource Delineation Report – Template, June 2019 (Walla Walla District)
• Delineation Resources
• Guidance for Aquatic Resource Delineation Reports, June 2019
• Joint Application for Permit
  • Joint Application Instructions
• Jurisdictional Determination Request (Download) | Nov. 2023
• Section 10 Waters in Idaho

Link to FHWA Site:

• FHWA Water Environmental Topics

Sole Source Aquifer

• Sole Source Aquifer Memorandum of Understanding (MOU)
• Sole Source Aquifer Checklist for EPA Review
• Region 10 Sole Source Aquifer Map

Temporary and Construction Site Best Management Practices
	Chapter 1 – Erosion Control Best Management Practices (entire chapter)		1/2014
		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)		1/2014
		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)		1/2014
		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)		1/2014
		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)		8/2011
		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		8/2011
BMP Manuals Updates/Changes
	ITD Best Management Practice Manual Change Request Form		8/2011

• 100.00 – Purpose and Overview
• 200.00 – Nepa Process Overview
• 300.00 – Environmental Documentation and Procedures
• 400.00 – State and Local Projects
• 500.00 – Process for Class II Projects
• 600.00 – Air Quality
• 700.00 – Water Quality/Surface Water
• 1000.00 – Wildlife, Fish, and Vegetation
• 1100.00 – Wetlands
• 1300.00 – Noise
• 1400.00 – Hazardous Materials
• 1500.00 – Wild and Scenic Rivers
• 1600.00 – Agricultural and Farmland
• 1700.00 – Public Lands Section 4(F), 6(F) and Forests
• 1800.00 – Historic, Archaeological and Cultural Resources
• 1900.00 – Social and Economic Conditions
• 2000.00 – Environmental Justice
• 2100.00 – Visual Impacts – Light And Glare
• 2200.00 – Secondary and Cumulative Impacts

Clean Water Act (CWA)
In 1972, Congress passed the Clean Water Act (CWA) “to restore and maintain the chemical, physical, and biological integrity” of the Nation’s waters. The CWA set the basic structure for regulating discharge of pollutants into waters of the U.S.

National Pollutant Discharge Elimination System (NPDES)
One of the ways the CWA sought to regulate discharges of pollutants to waters of the U.S. was through the National Pollutant Discharge Elimination System (NPDES) permitting program. NPDES permits contains limits on allowable discharges, monitoring and reporting requirements, and other provisions to ensure that discharges do not harm water quality or public health.

Idaho Pollutant Discharge Elimination System
Authority to implement the NPDES program in Idaho was delegated to the Idaho Department of Environmental Quality (IDEQ) in phases beginning on July 1, 2018 until completion on July 1, 2021. Thus, the CWA implemented in Idaho is now called the Idaho Pollutant Discharge Elimination System (IPDES) on all non-tribal lands. The Environmental Protection Agency (EPA) still retains authority to permit NPDES activities on tribal lands in Idaho.

Idaho Transportation Department (ITD) has coverage under three different types of CWA permits, including:

• IPDES Construction General Permit (CGP) – Construction activities that disturb greater than one acre of land or are part of a larger common plan of development on non-tribal lands and have the potential to discharge stormwater to waters of the U.S. and are regulated by the IDEQ.
• NPDES CGP – Construction activities that disturb one acre or more of land or are part of a larger common plan of development on tribal land and have potential to discharge stormwater to waters of the U.S. and are regulated by the EPA.
• Municipal Separate Storm Sewer System (MS4) Permits – Stormwater drainage from roads or property that drains into conveyance systems owned by a municipality that meets certain criteria of population size and discharges into waters of the U.S. and are regulated by the IDEQ.

Go to ITD’s Form Finder web page – Use the numbers below to search & download the current ITD form(s).

Construction General Permit (CGP) Projects requiring a Stormwater Pollution Prevention Plan (SWPPP)
ITD-2741 Form – Construction Stormwater Site Evaluation Worksheet
ITD-2784 Form – Stormwater Site Assessment (for Design)
ITD-2950 Form – Stormwater Pollution Prevention Plan (SWPPP) Narrative for Construction Activities

Guidance
Stormwater Runoff Action Items Tool
Buffer Design Decision Flow Chart
Buffer Calculation Presentation
Buffer FAQs

Non-CGP Projects requiring a Pollution Prevention Plan (PPP)
ITD-2788 Form – Pollution Prevention Plan Template

Contractor Notes (CN)
CN Winter Shutdown

• 2023 Standard Specifications for Highway Construction

Go to ITD’s Form Finder web page – Use the numbers below to search & download the current ITD form(s).

Inspection
ITD-2802 Form – Stormwater Compliance Inspection Form (CGP Projects)
ITD-2960 Form – LHTAC Transfer of SWPPP Inspection Responsibility
ITD-2960-Instructions – LHTAC Transfer of SWPPP Inspection Responsibility (Instructions)
ITD-2790 Form – Notice of Potential Violation of the 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

ITD projects with CGP coverage require Inspectors with current ITD Inspector Qualification and a Contractor representative with current ITD-approved Water Pollution Control Manager Training.

Water Pollution Control Manager
Course Length: 16 Hours
ITD requires all Contractors to designate a Water Pollution Control Manager (WPCM). The WPCM must attend an ITD-approved 16-hour stormwater management training course. This course has been developed to align with the 2022 CGP. Offerings are available at the following link.

AGC WPCM Training: http://web.idahoagc.org/events

Consultants – Construction Engineering & Inspection – Stormwater Inspector
To certify, complete the ITD Inspector Qualification Training course – or – the Idaho Associated General Contractors (AGC) WPCM Training course (see above). Those who complete the AGC course must also submit an Inspector Qualification Registration Form ITD-2905, found in the ITD’s Contract Administration (CA) Manual, Section 114 or ITD’s Form Finder web page 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
ITD Inspector Qualification Training
Course Length: 16 hours
This course is required for ITD Construction Engineers, project managers, project inspectors, and maintenance staff to complete mandatory stormwater management training.

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 1: Permit no. IDS-028223

Annual MS4 Permit Reports
Annual reporting is required for MS4 permit holders.

Phase II – District 1

• 2022-2023 Annual Report
• 2020 Annual Report
• 2019 Annual Report
• 2018 Annual Report
• 2017 Annual Report
• 2016 Annual Report
• 2015 Annual Report
• 2014 Annual Report
• 2013 Annual Report
• 2012 Annual Report
  • MS4 Monitoring Data
• 2011 Annual Report
  • MS4 Map
  • MS4 Monitoring Data
• 2010 Annual Report
• 2009 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.

Annual MS4 Permit Reports
Annual reporting is required for MS4 permit holders.

• 2023-2024 Annual Report
• 2022-2023 Annual Report
• 2021-2022 Annual Report
• IDS-02825 | Compliance Letter
• 2020-2021 Annual Report

Phase II – District 2

• District 2: Permit no. IDS-028258
• Storm Water Management Program – District 2
• Lewiston MS4 Permit Area Map
• Lewiston MS4 Permit Outfall Map
• Monitoring & Assessment Plan
• Quality Assurance Project Plan (QAPP)
• Sediment Reduction Plan

ITD Phase I and Phase II MS4 – For complaints please call: 208-334-8300

• Greg Vitley – Municipal Separate Storm Sewer System Permit-Hazardous Materials, Illicit Discharges, Illegal Connections, and Illegal Dumping
• Chris Branstetter – Construction General Permit
• Public Education
  • Storm Water Pollution Compliance
  • Erosion Sediment Guide

What to do with household hazardous waste? Learn more at Household Hazardous Waste | City of Boise

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Phase I – District 3

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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. ITD District 3 is a partner of the Partners for Clean Water group with local MS4 co-permittees. | Partners for Clean Water

If you’d like to speak to someone, you can call the Stormwater Pollution Prevention hotline at 208-395-8888. | Partners for Clean Water – Report an Issue

• Phase I Permit – IDS027561
• Permit Area Map
• Phase I Storm Water Management Program
• Other Permittees in the IPDES MS4 Phase I Area

Annual MS4 Permit Reports
Annual reporting is required for MS4 permit holders.

• ITD District 3 Phase I MS4 Annual Report

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Phase II – District 3

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• Phase II Permit – IDS028177
• Urbanized Area Map

Annual MS4 Permit Reports
Annual reporting is required for MS4 permit holders.

• District 3 Phase II Stormwater Management Plan (SWMP)
  • To comment on the SWMP contact Greg Vitley at: Greg.Vitley@itd.idaho.gov
• ITD District 3 Phase II MS4 Annual Report – April 2023
• ITD District 3 Phase II MS4 Annual Report – April 2022

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Other Permittees in the NPDES MS4 Phase II Area

• City of Nampa Website – Environmental-Compliance
  • Public Education and Outreach (City of Nampa)
• City of Caldwell Website – Main Stormwater Page

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.

Phase II – District 5
• 2022-2023 Annual Report
• 2019-2020 Annual Report
• 2017-2018 Annual Report
• 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
• 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
• Storm Water Management Program

Annual MS4 Permit Reports
Annual reporting is required for MS4 permit holders.

Phase II – District 6

• 2022-2023 Annual Report
• 2021-2022 Annual Report
• 2020-2021 Annual Report
• 2019-2020 Annual Report
• 2018-2019 Annual Report
• 2017-2018 Annual Report
• 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

Wildlife crossings like underpasses or overpasses can drastically reduce the risk of wildlife-vehicle collisions when planned and positioned appropriately.

• Idaho Fish & Game Roadkill Data

The type of crossing structure depends on a number of factors. The department works with IDFG to analyze data including roadkill or carcasses, crashes, traffic volumes, migration and movement routes and more. Once a need is established, the agencies coordinate on what type of crossing is appropriate; some larger animals, like elk, are more comfortable using overpasses than underpasses.

ITD also identifies infrastructure that restricts the movement of fish. Steep or undersized culverts can prevent fish from moving upstream to access spawning habitat, find food or escape predation or stranding.

Funding for wildlife crossings primarily comes from competitive federal grants; no dedicated state funding is available. Projects are primarily identified by staff at regional offices based on demonstrated need.

Highway infrastructure can inadvertently limit the movement of fish to access habitat to spawn, search for food, migrate or escape predation. Culverts can be too steep or too small, creating faster flows that make it difficult for fish to swim upstream; they can also be perched too high above the channel and prevent fish from moving upstream.

When planning projects to improve existing highways, ITD actively looks to remove these barriers, often by replacing culverts with bridges or modifying culvert designs.

The department has also pursued federal grant opportunities in the absence of dedicated state funding to construct improvements specific to fish passage without being paired with highway improvements. Several projects are currently scheduled to improve fish passage, primarily in the Lewiston region that has the most habitat and population of endangered steelhead and salmon.

ITD has several projects planned or ongoing to make highways safer for humans and wildlife. Some of those projects include:

• Ongoing construction on U.S. Highway 95 near McArthur Lake will replace a box culvert with a longer bridge with greater vertical clearance to allow wildlife to pass underneath the highway to access the wildlife refuge.
• Also in North Idaho, IDFG received a grant in 2023 for $250,000 to work with the community in Osburn to transform an Interstate 90 overpass into a crossing for elk and other large animals. No date has been set yet for construction as plans must be completed and additional funding identified.
• The department is seeking grant funding for an underpass on U.S. Highway 30, Rocky Point Wildlife Crossing, south of Montpelier and targeting construction in 2025 to prevent collisions with wildlife, primarily mule deer. About 100 mule deer are struck by vehicles every year as they cross from summer habitat in the Caribou Mountains to winter habitat in the Bear Lake Plateau.

A statewide study is underway to identify hotspots for wildlife-vehicle collisions and to then develop a list of prioritized areas of major concern on state highways and interstates. The study will help the department pursue federal funding for improvements and is expected to be finished in summer 2024.