Admin Order 58-12-14 - Laserfiche WebLink

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Lane County Board of Commissioners April 27, 2010 Page 4 year, 24 -hour, rainfall events. Rainfall events in excess of the 50- year, 24 -hour, storm will not be regulated, 2. The allowable post - developed flow rate, for each regulated recurrence interval, shall be limited to the greater of: a. A flow rate equal to 0.116 cfs per acre, or b. Historic pre - development flow rates considering any constraints up to the point of connection with the District's system. The Master Plan does not adequately address the three issues presented earlier in this response. The Master Plan does not adequately recognize and implement the District's policies regarding the discharge of storm water from developed urban lands. The District requests that before adoption of the Master Plan the participating jurisdictions work with the District to modify the Master Plan to address the District's issues and to recognize and implement its policies regarding those issues. At a minimum, and for example, the following sections of the Master Plan should be modified: Section 2.5.1 Waterways needs to be modified to accurately describe the District's system of ditches and the capacity of those ditches to move water from the area (particularly the A -1 Channel and Flat Creek); Section 2.5.5 needs to be modified to accurately describe the District's system, its capacity and existing flow rates (and the implementation of District policies regarding the same); Section 3.1 needs to be modified to incorporate the District's hydrologic and hydraulic information regarding its capacity and both pre - development and post - development flow rates. In conclusion, the District requests a simple acknowledgement by Lane County and the City of Eugene that it is an agricultural flood control district whose system of ditches does not have the capacity to absorb additional water from newly - developed urban lands and uses. In concert with that acknowledgement, the District requests that the Master Plan reflect those facts and that the Master Plan include the District's policies regarding storm water discharge from newly- developed urban land and uses.