DEQ seeks comment on draft 401 water quality certification for ​Middleton Road and Linden Road roundabout project

Accepting comments from January 20, 2025, through February 10, 2025.

BOISE – The Idaho Department of Environmental Quality (DEQ) is seeking comment on a draft water quality certification for the Middleton Road and Linden Road roundabout project.

The proposed project plans to fill and relocate approximately 400 linear feet of the Caldwell Highline Canal to accommodate a newly constructed roundabout at the intersection of Middleton Road and Linden Road. The applicant proposes relocating the current Middleton Road bridge approximately 20 feet south of the original location, while rerouting approximately 400 feet of the Caldwell Highline Canal. Additionally, the project will line 242 feet of the Caldwell Highline Canal with concrete to reinforce the channel and provide structural integrity to the new roundabout.

Based upon review of the federal ​permit​ application, readily available water quality related materials, and certification request in accordance with 40 C.F.R. §§ 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 review on DEQ’s Public Comment Opportunities web page. Written comments will be accepted through February 10, 2025, 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

Related Documents

Draft Certification

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/.