City of Rio Dell Seasonal Percolation Pond Construction


SCH Number
Public Agency
Regional Water Quality Control Board, Region 1 (North Coast), Santa Rosa
Document Title
City of Rio Dell Seasonal Percolation Pond Construction
Document Type
NOE - Notice of Exemption

Document Description
From May 15th through September 30th, when the Applicant (Rio Dell) is prohibited from directly discharging wastewater to the Eel River, a pond is constructed on the river bar to impound treated wastewater and facilitate percolation of wastewater into the subsurface. The project involves annual construction of the percolation pond on the river bar during the seasonal low flow period. The project site is a 0.7-acre area of gravel on the gravel bar to build berms creating three sides of the percolation pond. The existing riverbank is used as the fourth side of the pond and will be left in its natural state. The surface of the existing raid at the end of Edwards Drive will be graded to improve access for vehicles and equipment. The berms created for the percolation pond will be removed and graded back into the gravel bar prior to the end of each seasonal low flow periods such that the graded area will drain and not impound water. The percolation pond is generally constructed prior to May 15th and removed immediately prior to the rise of the river after onset of the winter rainy season.

Contact Information
Lisa Bernard
Regional Water Quality Control Board, Region 1 (North Coast), Sa
Lead/Public Agency
5550 Skylane Boulevard, Suite A
Santa Rosa, CA 95403

Phone : (707) 576-2677


Rio Dell

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Reasons for Exemption
Existing Facilities

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613.

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