2007-06-27 Set Agenda & Handouts

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City of Centerville Public Works facility Page 2 6/22/07 Parking and traffic circulation \ft!e have not analyzed the number of parking stalls required by ordinance, but it appears that the parking (or proof of parking) shown on the drawing would likely be adequate. It would probably not be necessary to have the concrete curb island jut out from the SE corner of the building to allow better traffic movement. It is our understanding that an additional overhead door is to be added to the south side of the building. The parking stalls in front of that door would, obviously, need to be removed. A driveway could be installed directly in front of that door, for the easiest flow of traffic in and out. However, this driveway would remove trees which currently shield the residential area to the south and would open up the possibility of noise coming from the shop when that door is open. The alternative to this driveway, would be to have one at the west end of the parking lot as is shown on the current drawings. A driveway at the east end of the parking area would probably be appropriate for traffic looking to access the back of the building. This would keep that traffic from running by the office entrance where, from time to time car traffic may need to be as consultants, sales persons and the like would park to visit employees. Future Water Treatment PlantlWells and related water mains The addition of a future water treatment plant, while possible, would be a tight squeeze for a number of reasons. The open space in the SE corner of the property would be subject to 50-foot setbacks from both Cedar St. and the future 21st Ave. right-of-way, leaving little room to build a building. Additionally, a significant amount of wetland mitigation would need to be done in addition to the replacements needed for the extension of 21 st Ave. The space in the NW corner of the site would be. a bit more spacious, but would significantly impact the functionality of the site as a public works facility. As a rule of thumb, wells such as those currently used by the City of Centerville need to be spaced at least 500 feet apart. On this site, that would mean having two in opposite corners from each other. Plus, there is no guarantee that these locations would produce good wells. It would be overly optimistic to anticipate being able to place two wells on this site without significant interference. That being said, a treatment plant would need to be fed from other well sites in town, adding costs for raw water main. Also, once the water was treated at this site, there would need to be sufficiently sized water mains to get the water to the rest of the distribution system effectively. Those mains do not exist in this corner of town to the extent necessary. A better location for a water treatment facility (should one ever be needed) would be the City Hall site. This site has both the proximity to wells and large distribution mains necessary to keep the costs of the facility down. Long story short, this probably isn't the best site for treatment. Utilities (sewer and water) A water main loop will be needed to connect the water main in Cedar Street to the water main dead end in Fairview and the one coming south on 21 st Ave. This could be accomplished by running the water main along the south of the property and then up the east edge. Alternatively, the water main could be brought up the west edge of the property and, when the property to the north develops, could be extended through the interior of that development to its connection with Fairview. This would save a few hundred feet of water main and the need to cross the large wetland in the north east corner of the site.