Open Space Advisory Board Agenda and Packet 2011 08 11

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Preliminary PUD and Plat July 7, 2011 th 96 and Dillon 1 2 3 4 5 6 7 8 Parcel ID Gross RightOtherNet12%PLDPLD Areaof Way PublicAreaPLDProvidedOther (ac)Dedications(ac)Rqd.(ac)(ac) St Louis Parcel 32.759 2.160 0.813 29.786 3.574 3.667 0 Tennis Center 13.121 1.768 0 11.353 1.362 0.519 0.843 Games Parcel 5.692 0.362 0 4.945 0.593 0.315 0.278 Totals 51.572 4.29 0.813 46.074 5.529 4.501 1.121 Gross area reflects arrangement for land swap between Tennis Center and Games Other public dedication is for drainage channel for conveyance of non-site generated runoff (off site). PLD other is cash-in-lieu (C.I.L.) or deferral as noted in narrative Areas listed for PLD provided exclude encumbered areas of Outlots PLD provided plus PLD other equals 5.622 acres and exceeds required value of 5.529 acres Utilities and Drainage This is a challenging site for the Owners to develop. The primary challenges come from offsite impacts to the land and the ability to serve the parcel with sanitary sewer and to drain the property of surface runoff. The domestic water systems, gas systems and electrical systems appear to be sufficient and are adjacent to the property. Regarding the sanitary sewer, there is currently no outfall connection extended to this site. The location of the City’s wastewater treatment plant is such that gravity connection of this parcel is not available. The adjacent parcels to the east obtain sewer connection by a municipal lift station in the Colorado Technological Center. The City recently upgraded this facility to accept the flows from this and other parcels. There area fees associated with these improvements should this development connect to those facilities. While the lift station exists, the BNSF railroad blocks the ability to connect to the existing City sewer system in the CTC. This project will attempt to obtain approval from the BNSF and a property owner in the CTC to route a sewer main under the tracks and through a private lot to the City’s existing system in Arthur Avenue. Easements across the private property will need to be negotiated on behalf of the City and the work would be completed by the ownership group. With this concept, the Games family parcel is proposed to connect to the existing outfall from the CTC as it converts from pressurized system to a siphon that extends under Coal Creek to the north. This connection would reduce the amount of infrastructure in the City’s inventory by shortening the public main lines from the site to the Outfall system, and lessen the burden on the facilities in the CTC, should that connection occur. Should the owners group not be successful in negotiations, an on-site lift station and force main connection to the siphon at Coal Creek is an alternative. This alternative could occur independent of the BNSF railroad crossing and offsite easement acquisitions. Similar with the sanitary sewer, the drainage outfall for this property is essentially non-existent. This parcel accepts runoff from the open space parcel to the west, where it then combines with on-site runoff and flows to a low point against the BNSF railroad tracks about 1,400 feet north of Dillon Road. The development of the CTC assumed that all runoff west of the railroad tracks Page 6 of 10