Or. Admin. R. 690-020-0160

Current through Register Vol. 63, No. 6, June 1, 2024

Section 690-020-0160 - Removal

(1) Dam owner(s) seeking Removal of any Dam with a High or Significant Hazard Rating must notify the Department.

(2) Dam owner(s) shall provide the Department with a Removal plan for evaluation prior to removing the Dam. Plans must be submitted a minimum of 60 days in advance of Removal to allow reasonable time to evaluate the Removal plan, unless the Department agrees to a different timeframe.

(3) A Removal plan must include:

(a) Descriptions and assumptions for the Removal of the Dam;

(b) A description of the means for Removal of the Dam to prevent future impoundment and a method of draining the reservoir in a controlled manner prior to the start of the Removal;

(c) A schedule listing the major events and corresponding time frame that will occur during the Removal;

(d) A plan for disposal and stabilization of Dam material; and

(e) A drawing showing the planned Removal location, breach dimensions including side slopes, and lowest elevation of the breach. The Removal plan must show that there will sufficient material removed and left at slopes that will allow no breach flood by erosion of remaining materials.

(4) The Department may evaluate the Removal plan to ensure the plan includes appropriate safety precautions to protect life, property, and public infrastructure from temporary inundation in the area below the Dam during Dam Removal.

(5) The Department may require changes to the Removal plan or require that the work performed under the plan be supervised by an Engineer as necessary to protect life, property, or public infrastructure from temporary inundation during Dam Removal. If the Department requires changes to the Removal plan or requires that work be supervised by an Engineer, the Department shall notify the Dam owner and provide an opportunity to meet with the Department.

(6) Upon completion of the Dam Removal, the owner shall notify the Department. The Department shall make a final inspection, if appropriate, and remove it from Department Dam safety oversight.

Or. Admin. R. 690-020-0160

WRD 3-2020, adopt filed 06/29/2020, effective 7/1/2020

Statutory/Other Authority: ORS 536.027, 540.488

Statutes/Other Implemented: ORS 540.452, 540.488