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Planning Commission MeetingPage of 12 ? noting that not all runoff would be overland, and as modeled, with City Engineers and Mr. Muellers ? Engineer still refining the plan, maintenance of the basins would be a requirement of the homeowners association. However, if the homeowners association was found at fault in providing ?? that maintenance, the City would step in to address maintenance itself or by hiring a third party to do so, and then assess those property owners accordingly for that cost . If and when city code or watershed district standards change in the future, Member Bull asked if these stormwater runoff options would be grandfathered in at the old standards or if they would require updating as well. Mr. Lloyd clarified that grandfathering” was a term related to land use, but other parts of code ? provided protections and address that ongoing maintenance and stormwater monitoring via a public infrastructure contract. Given the fact that this proposal includes a private road, Member Gitzen questioned if that required a homeowners association to ensure its maintenance, even without the addition of stormwater ? ponds and their maintenance. Member Gitzen noted reference in the staff report (lines 121123) of ? documents for review and approval by the City Attorney, and whether or not that meant they would have input into the contract language. Mr. Lloyd verified that an association would be required for maintenance of the road. Mr. Lloyd confirmed that the purpose of the City Attorneys review was to protect the City and its residents ? and advised they would revise language accordingly to provide those protections. Applicant Representative Engineer Charles W. Plowe, Plowe Engineering Specific to drainage questions raised tonight by commissioners, Mr. Plowe advised that the rate control would be addressed through catch basins, with the upstream pond built to allow water to drain slowly with minimal if any pooling. Mr. Plowe clarified that this would address the same volume of water flowing into the catch basins as experienced today, but at a slower rate to avoid street flooding. Specific to volume control, a concern brought up by neighboring residents in the past, Mr. Plowe clarified that the rate had been slowed as well as the volume reduced, but not by 82%, but more in the range of 16% volume of water reduced. The reduction by 82% of the rate was huge and critical. Mr. Plowe provided rationale in routing the water to Acorn Road to help the volume of water flowing in to the southwest portion of the property; and with this iteration, water would leave the site very slowly and infiltrate into the drainage tile system, connecting to an 8” pipe and downstream into that underground system to Acorn Road. Mr. Plowe advised that the City Engineer had indicated there would be no problem with this additional flow with existing stormwater management in the area. Member Cunningham noted that one reason for previous proposals being ultimately denied by the City Council was due to concerns with emergency vehicle access; and asked for comment on this latest iteration without a culdesac to facilitate that, as well as addressing whether or not widening ?? the street to 32’ would alleviate emergency vehicle access issues. Mr. Plowe noted that, with this iteration, the road had been shortened 25’ from the previously Planning Commissionapproved development proposal, making the actual length of the street quite ? short. City Planner Thomas Paschke clarified that concerns were raised by an individual Councilmember or from area residents, he couldnt readily remember. However, Mr. Paschke noted that the Fire ? Department was part of the DRC in reviewing any proposal, and had indicated no areas of concern. Mr. Paschke advised that this private street would be similar to local streets having parking on both sides, traffic, and delivery vehicles all having access, in addition to being able to accommodate emergency vehicle access. At the request of Member Bull, Mr. Plowe advised that, while he didnt have actual impervious ? surface calculations available for this iteration compared to previous proposals, impervious surfaces had been reduced by eliminating one proposed building site and driveway, estimating that alone would reduce it by approximately 1,000 feet. Developer and Property Owner Art Mueller Mr. Mueller stated that the road would now be so short it was shorter than his existing driveway. Mr. Mueller opined that there should be no problems for delivery or emergency vehicles; and noted that due to the short private road, residents would actually haul their garbage out to Acorn Road. file:///R:/CommDev/PLANNING_AND_ZONING/PLANNING_COMMISSION/Minutes/...4/11/2016