DCPZP-2016-00088 - Laserfiche WebLink

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damage to the emergency spillway. Problems identified by the inspections shall be repaired as soon as practicable. Sediment accumulations shall be removed by dredging when two (2)foot of siltation has occurred,when the basin's infiltration rate becomes inadequate, or as directed by the Town of Springfield or Dane County.The dredged materials shall be removed and disposed of in accordance with NR 347. The detention basin shall be mowed in minimum of twice per year. Mowing shall maintain a minimum grass height of 6 to 8 inches. Areas of sparse vegetation shall be reseeded. Additional fertilizer shall be applied as needed, per the results of a soil test. Separate and distinct records shall be maintained by the owner to record the specific activities and costs thereof for the maintenance plan implementation. The records shall include the dates of maintenance visits and specific work performed. Records shall be kept as required by local,state or federal law. Stone Trench The owner shall install and maintain the stone trench as shown on the Grading and Erosion Control Plan. The stone used in the trench shall be limestone. The stone trench shall be inspected on an annual basis and after rainfalls of 0.5 inches or more.Accumulated sediment should be removed at least twice a year. The top 12" of limestone should be replaced when it becomes coated with oil and grease and is no longer effective.The removed limestone should be disposed of properly. Infiltration Baisn Visual Inspection of the Infiltration Basin shall be performed,at a minimum,annually. Maintenance shall be required when system shows standing water beyond 72 hours of rain event. Cleaning shall consist of removal of sediment, two (2) foot undercut replacement with material consisting of 15-30%compost and 70-85%sand and restoration in-kind. Restoration of plant material shall be with native plugs or seed mixture tolerant of fluctuating water conditions. If a seed mixture is used steps shall be taken to assure vegetation establishes. NSrn; - S T\ Zo \3 - o I Lrig 5 tkQQs c zAQ-5 cywe..Q.ve.o.v\-N)