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ENVIRONMENTAL BOARD MEETING OCTOBER 29, 2003 <br />Donlin inquired about the runoff from the parking lot. Asleson responded that <br />they were planning to use swales, ponds and rain gardens before the water flowed <br />into the ditch. He urged them to consider other additional options. <br />Donlin stated that a conservation easement takes the land out of development <br />forever. She noted the high water level was not addressed on the maps. She <br />asked for clarification if the Rice Creek Watershed District would oversee the <br />easement. Ms. Bauman confirmed the Rice Creek Watershed District was the <br />regulating unit, and would do their own monitoring. <br />Mr. Scheer indicated the conservation easement was legally binding. <br />Donlin recommended delineating the high water level on the map showing the <br />buildable land. <br />Chair Kukonen addressed the City minimum parking spaces would be about 930 <br />stalls. Ms. Leonidas answered the numbers were derived from the congregation <br />and support staff such as nursery help. She added that pervious parking usually <br />provided fewer spaces, because of the lack of markings. <br />Grundhofer inquired about a school on the premises. Ms. Leonidas answered that <br />it was a nursery for the kindergarten age during the services. There were no plans <br />for a school. <br />Grundhofer questioned the numbers 60,000 square feet and 88,000 square feet for <br />the building. Ms. Leonidas responded the numbers were from the EAW, but the <br />figure at present was closer to 84,000 square feet. <br />Grundhofer questioned the reason for grading and drainage for merely a 3/4 inch <br />rainfall event. Mr. Eschenaur explained the ponds were designed addressing three <br />criteria. First, 1/3 inch needed to be completely infiltrated. Second, a 2-1/2 inch <br />event would need to be completely treated. Third, the 100 year event is calculated <br />at 6 inches would be discharged at a certain rate. <br />Donlin inquired about a design for a 6 inch rainfall. Mr. Eschenaur answered that <br />the discharge would not be completely treated from 2-1/2 inches and larger <br />rainfall event. The rate would be controlled, so it would not be a deluge. He <br />indicated this was a typical practice. <br />Asleson added that skimmers would also be required. <br />Ms. Bor stated they met with RCWD and were told that the ponding was <br />considered good. Ditch 72 flowed directly into the lake. She was told that the <br />City had to require pond maintenance, because the RCWD could not require <br />APPROVED MINUTES <br />