07-12-1999 Council Packet - Laserfiche WebLink

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I/1J Bonestroo Rosene Anderlik &. I Associates Engineers & Architects Bonestroo, Rosene. Andertik snd Associates, tnc. ts an Affirmative ActiOrV^qua! Opportunity Employfr Principals: Occo C. Bonestroo. PE. • Joseph C Anderiiii. PE. • Marvin L Sorvala. PE. • Glenn R. Cook. PE. • Robert G Schunichc. PE. • Jerry A. Bourdon. P£. • RoOerc W. Rosene. PE.. Richard E. Turner. PE. and Susan M. Eoerlin. CM.. Senior Consultants Associate Principals: Howard A. Sanford. PE. • Keith A. Gordon. PE. • Robert R. Pfefferfe. PE. • Richard W Foster. PE • David O. Loskota. PE. • Robert C. Russek. AJ.A. • Marti A. Hanson, px • Michael T. Rautmann. PE. • Ted KField. PE. • Kenneth P. Anderson. PX • Mark R. Rolfs. PX • Sidney P. Williamson, PE., LS. • Robert F. Kotsmith • Agnes M. Ring • Allan Rick Schmidt. PE. Offices: St. Paul. Rochester. Wiiimar and St. Ooud. MM • Milwaukee. Wl WeOsite: www bonestroo com Junes, 1999 Mr. Greg Gappa Director of Ptiblic Service*; City of Orono PO Box 66 Crystal Bay MN 55323-0066 Re: Fox Ridge Feasibility Report File No. 139-GEN Dear Greg: As directed by City staff, we have reviewed the existing conditions and the possible installation of sanitary sewer to serve the Fox Ridge neighborhood. The neighborhood is located on the east and west sides of South Brown Road just south of the Luce Line trail in Orono. There are nine total properties that would benefit from sanitary sewer. City records indicate that most septic systems in the neighborhood are non-conforming or failing. Designs for both a gravity system and a grinder (pressure) system were considered as shown on Figures 1 and 2. The gravity system would require the installation of a permanent lift station in the Fox Ridge neighborhood. Gravity sewer pipe would be installed in the street and carry flows to the lift station. Sanitary sewer services would be extended to the property lines. The grinder system option would require the installation of a common forcemain along the edge of the existing street. Services would be extended to the prq>erty lines. Each residence would be served by a residential grinder station that would pump flows into the common forcemain In both the gravity and pressure options, the sewer pipe crossings under C.R. 146 and the Luce Line trail would be jacked or directionally bored. Both systems assume flows would be pumped to an existing gravity manhole at the intersection of Brown Road and Watertown Road in Long Lake. The following is a summary of the estimated costs for each option: Area # of Units Est. Project Cost Est. Cost/Unit Fox Ridge-Grinder 9 $190,000 $21,100 Fox Ridge-Gravity 9 $304,000 $33,800 The gravity sewer option would require that the sewer be installed in the roadway and therefore complete street reconstruction will be required. Street reconstruction costs have been included in the gravity sewer estimate shown above. The grinder option assumes that the forcemain would be directionally bored along the edge of the roadways and therefore street repairs would be necessary only at manhole locations. The estimated costs are based on 1999 unit prices and can be related to the ENR Construction Cost Index for May, 1999 of 6,006. Soil investigation work has not been completed and the estimated costs are based on typical Orono soils. 7:i3c \y/ac» ui/nhxA/aw ;iA ■ ct Paul MM ■ A<;i-6.^6-4Ano ■ Fax: 651-636-1311