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<br />that enter the system. No adjustments will be made to single family residential parcels. It <br />is the responsibility of the applicant to prove that the wet pond in question meets the <br />following design criteria. <br /> <br />1. Permanent Pool Volume: The volume of the permanent pool ("dead <br />storage") should be at least 1.3 and preferably up to 2.5 times greater than <br />the runpff volume generated from a 0.34 inch rainfall event (average <br />summer storm) over the pond tributary area. <br /> <br />2. Permanent Pool Depth: To promote settling and provide space for <br />sediment accumulation, the average depth (volume/area) of the permaneht <br />pool should be at least 4 feet with a maximum depth of 10 feet. <br /> <br />3. Pond Shape: The pond should be wedge shaped, narrowest at the inlet <br />and widest at the outlet. A minimum length to width ratio of 3:1 should be <br />used. The distance between storm sewer outfalls and the pond outlet <br />should be maximized to prevent short-circuiting. <br /> <br />4. Detention Time: The pond should provide a detention time of at least 6 <br />hours. <br /> <br />5. Skimming: The pond should have some type of facility to retain oils and <br />floatable debris. This facility will be maintained by the applicant. <br />Skimming shall be considered adequate if a baffle structure extends at <br />least 4 inches below the normal water surface and the velocity of water <br />passing under the baffle does not exceed 0.5 feet per second for the one <br />year rainfall event. <br /> <br />6. Emergency Overflow: An emergency overflow structure or stabilized <br />spillway will be provided to accommodate discharges during a storm event <br />greater than a 2.5 inch rainfall. <br /> <br />7. Side Slopes: For purposes of stability, the side slopes should not exceed <br />three feet horizontal to one foot vertical. <br /> <br />Sec. 31-5. Exemptions. <br /> <br />The following land classifications are exempt from any stormwater fees: <br /> <br />a. Public Right-of-Way <br />b. Land that is owned by the City of New Brighton <br />c. Unimproved vacant land <br /> <br />Sec. 31-6. Fee Appeal. <br /> <br />If a property owner or person responsible for paying for the stormwater fee believes <br />that a particular fee is incorrect, such person may request in writing that the fee be , ' <br />recomputed. If an error has been made, the fee will be adjusted and the landowner wilCbe <br />reimbursed the additional moneys collected due to the error for a period of one year from <br />the date of the letter. <br /> <br />4 of 5 <br />