08-09-1993 Council Packet - Laserfiche WebLink

Home Browse Search

Interim Storm Water Ordinance August 6, 1993 Page 7 projects would incorporate such a "completion agreement" Further, language has been revised from the model ordinance to allow the Council by resolution to waive the Letter of Credit requirement for specific categories or types of projects. Staff does not intend that every individual residential building project be subject to a formal agreement or Letter of Credit. The City may wish to write into this ordinance the specific categories of projects exempt from the Agreement/Letter of Credit. Subdivision 8 contains sixteen categories of approval standards, which Met Council suggests are appropriate excerpts from the "fiest Management Practices" document for inclusion in a local ordinance. These entries are quite abbreviated, and often refer to structures, methods, or procedures which are discussed at length in the BMP document. As you read through the approval standards, I believe you will agree that many of them are general common sense statements that you will agree with in principle. In fact, many of these practices have been required by City staff for many years, without any clear direction in the code. A potential problem, however, will be seen in standards F and G, which get into determination of watershed areas and runoff rates. This is where our newly acquired topographic maps are a critical part of storm water control implementation. For instance. Subdivision 8 (F-1) requires that "sheet flow runoff from adjacent areas greater than 10,000 square feet in area shall also be diverted around disturbed areas, unless shown to have resultant runoff rates of less than 0.5 cubic feet per second across the disturbed area for the one-year storm." This kind of a standard clearly requires engineering review to determine runoff rate for the one-year storm for a given site of certain slope and groundcover characteristics. On the other hand. Subdivision 8 (F-2) merely states all activities on the site shall be conducted in a logical sequence to minimize the area of bare soil exposed at any one time. This type of