01-09-2012 Council Work Session Minutes

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MINUTES OF THE ORONO CITY COUNCIL AND PLANNING COMMISSION JOINT WORK SESSION Monday,January 9, 2012 5:00 o'clock p.m. The ordinance would establish regulations applicable to all properties within the potential stormwater quality overlay district. Applicants would be required to provide a stormwater management plan any time an administrative engineering review, CUP or variance is needed. The OHW hardcover restriction zones would maintain the restriction on hardcover within the 0-75 foot area beyond the OHW, and add the same protection to bluff and shore impact zones. Driveways and shared driveways would be subject to existing regulations. There would also be standard hardcover inclusions and massing standards under the new ordinance. Gozola stated the general regulations for all parcels within the stormwater quality protection zone include the following: Stormwater Management Plan Requirements: All work within the Stormwater Quality Overlay District that requires an administrative engineering review, conditional use permit or variance shall only be authorized if supported by an applicant prepared stormwater management plan that is in compliance with the Stormwater Management Plan for the City of Orono, as may be amended, or as approved by the City Engineer. As part of the plan, the City Engineer,Planning Commission, and/or City Council may require an applicant to implement stormwater management practices deemed necessary to control stormwater, including but not limited to rain gardens, holding ponds, reductions in hardcover, and other accepted stormwater management techniques and methods. Any development ar redevelopment that creates more than 5,000 square feet of hardcover, irrespective of its required approval process, shall be required to submit a site stormwater management plan which achieves permanent treatment of 1.1 inch of runof£ The submitted site stormwater management plan shall be in compliance with all provisions of the City of Orono Stormwater Management Plan as may be amended. Preference shall be given to volume reduction techniques that include infiltration basins,rain gardens, enhanced infiltration swales, filter strips, disconnected hardcover areas, soil amendments, bio-retention, and other volume reduction techniques as approved by the City Engineer. For those areas of a project where there is no feasible way to meet the treatment requirements, other treatment, including grassed swales, grit chambers, vegetated filter strips,bio-retention areas, off-line retention areas, and natural depressions for infiltration, is required before the runoff leaves the project site or enters surface waters. All management technologies must be consistent with the latest Minnesota Stormwater Manual as may be amended. The City Engineer shall inspect the installation of best . management practices authorized by the stormwater management plan. Hardcover restriction zones are those areas within 75 feet of the Ordinary High Water Level of any lake or tributary, and within any bluff or shore impact zone,no hardcover shall be placed, located or constructed, except for driveways, stairways, lifts, landings and lockboxes as regulated by the Shoreland overlay district. Standard hardcover inclusions required in hardcover calculations regardless of whether they are proposed to be constructed at the time of a building permit application: 1. Proof of a two-car garage. 2. A driveway for all garages, a minimum of 12 feet in width, subject to the standards contained in another section. — — Page 2 of 11