Accepting comments from November 12, 2026, through December 3, 2026.
The Idaho Department of Environmental Quality (DEQ) is seeking comment on a draft 401 water quality certification for the Waverly Park Subdivision No. 2.
The Waverly Park Subdivision No. 2 project in Middleton, Idaho, proposes to subdivide land to create single-family building lots. The proposed project will fill four abandoned irrigation ditches, re-route a portion of an existing irrigation ditch, and connect a new juncture of Mill Slough with the re-routed irrigation ditch. The irrigation ditch will be rerouted to keep it open to benefit vegetation and wildlife. Mill Slough will have a pipe and culvert installed to connect the irrigation ditch. The project will impact a total of 8,893 linear feet (LF) of stream; however, only 15 LF of Mill Slough will be permanently impacted by the project.
Based upon review of the federal joint permit application, readily available water quality related materials, and certification request in accordance with 40 CFR §§ 121.5 (b) and (c) and 121.7 (c), DEQ, certifies that if the permittee complies with the terms and conditions imposed by the federal permit and the conditions set forth in this water quality certification, then it is reasonable for DEQ to conclude that the activity will comply with water quality requirements, including applicable requirements of the Clean Water Act §§ 301, 302, 303, 306, and 307, Idaho’s “Water Quality Standards” (IDAPA 58.01.02), and other appropriate water quality requirements of state law.
The draft certification is available for public review at DEQ’s State Office (1410 N. Hilton St. Boise, Idaho 83706), DEQ’s Boise Regional Office (1445 N. Orchard St. Boise, Idaho 83706), and on DEQ’s website. Written comments will be accepted through December 3, 2026, at 5 p.m. Mountain Time. Submit comments electronically using the form below or by mail or email to:
Meghan Cline
1445 N. Orchard St.
Boise, ID 83706
Meghan.Cline@deq.idaho.gov
Draft Permit
Accessibility Services: The Idaho Department of Environmental Quality will provide reasonable language access services and/or disability services for documents at no charge. To request an accommodation under Title VI of the Civil Rights Act of 1964 or Americans with Disabilities Act, contact DEQ’s nondiscrimination coordinator at (208) 373-0271 or accessibility@deq.idaho.gov. Para obtener información en español, visite https://www.deq.idaho.gov/about-us/accessibility/.
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DEQ seeks comment on draft 401 water quality certification for Waverly Park Subdivision No. 2 project
Accepting comments from November 12, 2026, through December 3, 2026.
The Idaho Department of Environmental Quality (DEQ) is seeking comment on a draft 401 water quality certification for the Waverly Park Subdivision No. 2.
The Waverly Park Subdivision No. 2 project in Middleton, Idaho, proposes to subdivide land to create single-family building lots. The proposed project will fill four abandoned irrigation ditches, re-route a portion of an existing irrigation ditch, and connect a new juncture of Mill Slough with the re-routed irrigation ditch. The irrigation ditch will be rerouted to keep it open to benefit vegetation and wildlife. Mill Slough will have a pipe and culvert installed to connect the irrigation ditch. The project will impact a total of 8,893 linear feet (LF) of stream; however, only 15 LF of Mill Slough will be permanently impacted by the project.
Based upon review of the federal joint permit application, readily available water quality related materials, and certification request in accordance with 40 CFR §§ 121.5 (b) and (c) and 121.7 (c), DEQ, certifies that if the permittee complies with the terms and conditions imposed by the federal permit and the conditions set forth in this water quality certification, then it is reasonable for DEQ to conclude that the activity will comply with water quality requirements, including applicable requirements of the Clean Water Act §§ 301, 302, 303, 306, and 307, Idaho’s “Water Quality Standards” (IDAPA 58.01.02), and other appropriate water quality requirements of state law.
The draft certification is available for public review at DEQ’s State Office (1410 N. Hilton St. Boise, Idaho 83706), DEQ’s Boise Regional Office (1445 N. Orchard St. Boise, Idaho 83706), and on DEQ’s website. Written comments will be accepted through December 3, 2026, at 5 p.m. Mountain Time. Submit comments electronically using the form below or by mail or email to:
Meghan Cline
1445 N. Orchard St.
Boise, ID 83706
Meghan.Cline@deq.idaho.gov
Draft Permit
Accessibility Services: The Idaho Department of Environmental Quality will provide reasonable language access services and/or disability services for documents at no charge. To request an accommodation under Title VI of the Civil Rights Act of 1964 or Americans with Disabilities Act, contact DEQ’s nondiscrimination coordinator at (208) 373-0271 or accessibility@deq.idaho.gov. Para obtener información en español, visite https://www.deq.idaho.gov/about-us/accessibility/.
Public Comment Form