PRECA 03-07-1984 - Laserfiche WebLink

Home Browse Search

BARR ENGINEERING CO. ' CONSULTING ENGINEERS DOUGLAS W. BARR JOHN D. DVCKSON L.R. MOLSATHER ALLAN GEBHARD LEONARD J. KRE MER DENNIS E. PALMER WARREN W. HANSON 6800 FRANCE AVENUE SOUTH MINNEAPOLIS. MINNESOTA 55435-2062 TELEPHONE (AREA 612) 920-0655 M E M O R A N D U M T0: Les Proper, Director of Public Works, City of New Brighton FROM: Barr Engineering Co. SUBJECT: Storm Retention Within City Park Areas DATE: February 29, 1984 At the last City of New Brighton Park commission meeting,. members of the Commission requested additional information regarding the utilization of stormwater detention within city park areas. The purpose- of this memorandum is to present information we have available regarding the impacts of stormwater detention on these areas. Attached to this memorandum is a summary sheet indicating the various park areas to be utilized for stormwater detention, the surface area of each basin to be utilized for detention, the storage capacity required for the critical 100-year frequency storm within each basin, and a fluctuation (bounce) between the normal elevation of the basin and regulation elevation required to provide the necessary flood storage. It has been assumed that all of the park areas required to be utilized for stormwater detention are to be inundation areas. This mean that storage (inundation) will be provided within the parks only during high-intensity rainstorm events. Stormwater runoff from the more frequent rainfall events, l- to 10-year frequency storms, will be handled either by existing or proposed storm sewer systems that will bypass the park (inundation) area. The creation and utilization of open water areas .within the parks has not been assumed unless the open water concept would enhance or benefit the park facility. The concept of providing storage within an open water basin and/or inundation area is outlined on page 8 of the Stormwater Management Plan. It is not anticipated that the park areas will be •