Agenda - Council Work Session - 08/09/2011

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Septic tank standards do allow for construction of a mound system over an existing drainfield, and this option was evaluated for size and cost considerations. The mound system would need to be approximately 40' wide x 80 long x 5' high, and is estimated to cost $15,000 - $18,000. Additional items that would also need to be completed with this approach include; the installation of fill material and grading to raise the grades at the rear of the property (to reduce water flow outside of the City easement in the future), restoration work (turf establishment and irrigation revisions), and the vacation of additional easement because the 40' dimension on the mound width would extend approximately another 10 feet in the remaining 25 foot easement retained by the City. Due to the need for additional easement vacation, and placing the new drainfield within the area adjacent to this further reduced easement, staff is not supportive of this option. Option 3 Staff evaluated the option for connected the property to the City's municipal sanitary sewer system; which includes directional drilling of a force main to the existing septic tank on the property, pipe materials, restoration, a pump and vault at the septic tank to lift the discharge to the city system (due to grade constraints), road work (bituminous removal and patching), and connecting to an existing manhole. This item is currently be estimated, and additional information will be provided at the meeting. The property owner is also concerned with the service charge for this connection (currently $67 per month). Recommendation: It appears as if the best option at this point is to consider connecting this property to the City's municipal sanitary sewer system. Once better estimates are prepared we can discuss further at the meeting. In an effort to expedite this matter staff has placed a case on the regular Council agenda for later this evening and would like to receive formal authorization to advance a resolution to this situation at that meeting. Ultimately it would probably make the most sense to have the property owner contract directly for this work so they can actively manage the contractor of their choice. Funding Source: The funding source for these potential improvements would most likely be the City Stormwater Utility Fund. Council Action: Based upon discussion. Easement Vacation Resolution Overview Map Lot Sketch Attachments Form Review Inbox Reviewed By Date Brian Olson Brian Olson 08/04/2011 02:24 PM Kurt Ulrich Amy Dietl 08/04/2011 02:31 PM Form Started By: Tim Himmer Started On: 08/04/2011 11:07 AM Final Approval Date: 08/04/2011