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LAKE ELMO CITY COUNCIL MEETING, MARCH 17, 1981 -7- Drainage Control - Folz asked what the policy is regarding agreements made prior to changes in regulations. He asked if the Council feels there would be a safety hazard in following the old rules with the old design? He stated the developers do not think so. He further explained design alternatives for ponding . Mr. Folz asked the Council if they would consider accepting a cash amount ($20,000/$30,000) to study and develop a storage area downstream rather than require the Brookman developers to provide permanent storage in the middle of a commercial area. The developers would provide the temporary storage designed for their plat. A 3 acre temporary storage area would accomodate the lst Addition, and if the rate were restricted this 3 acres would not have to be increased as long as only the lst Addition were developed. Folz noted that an obstruction on the south side of County 5 will need to be removed. Councillor Mottaz favored the suggestion to accept cash and agreed that Brookman Addition should not be used as a permanent storage area. He recommended developing a method of holding back the water longer than what is held back now until a down- stream solution is developed. Folz stated that since a stormwater study was made by the City Engineer (Bonostroo), and since the City approved the plat and permitted the developers to proceed with their development, that the City is bound to permit the developers to continue develop- ment under the regulations in existance at the time the plat was approved. He said the developers would agree to put in the 3 acre feet of temporary storage. The Council discussed temporary storage to accomodate Brookfield II, Phase I, and the degree of temporary and permanent storage adequate to serve the Brookman lst Addition. The Council agreed that any temporary ponding that might be approved would not satisfy current policy and that the developers should be aware they may be required to make revisions until such time as the policy is changed or an overall surface water plan is developed. Engineer Bohrer noted that the City's current standards closely approximate Valley Branch standards, and questioned how Valley Branch will view this matter. Novak stated that she is not ready to make a decision until more specifics are received from the City Engineer. She noted severe problems in this area last spring when there was no additional development. Novak moved, seconded by Morgan, to table further action until the Council has additional data and recommendations from the City Engineer. Motion carried 5-0. This will be on the April 7 agenda. BREAK: 9:35 p.m.