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Laurel Wand Architecture 1718 Logan Avenue South Minneapolis, MN 55403 612 874 1086 1 p laurei@lauretuttand.com I e M 2090 Shoreline Drive Orono, MN 55391 Conditional Use Permit Application Project Narrative January 18, 2017 Property Address: 2090 Shoreline Drive, Orono, MN 55391 Parcel Area: 3.79 Acres, or 165,138.1 S.F. (See attached EFN certified property survey) Property Owner: Martha Meyers Head, Trustee Property Type: Seasonal Residential Recreational, Non -Homestead Tier Assignment: Tier 1 Project Narrative. The property owner seeks a Conditional Use Permit to at[ow for the replacement of an existing structure, noted as "cabin" on the certified property survey, on property located at 2090 Shoreline Drive in the City of Orono. Based on City Code Section 78-1127(g), the property owner proposes to use an alternate method to elevate the new structure above the established floodplain or contour tine 931.5, as noted on the property survey. Sec 78-1127(g) states that "a[ternative elevation methods other than the use of fill may be utilized to elevate a structure's lowest floor above the regulatory flood protection elevation (932.5)." Based on the recommendation of the soils report prepared by Haugo GeoTechnical Services, issued April 29, 2016, and attached to this application, the owner proposes to use helical piers to support the new structure. Two soil borings were completed on the property in the area of the existing cabin. The report indicates that "the topsoil, existing fill, organic silt and very loose sands are compressible and not suitable for foundation support". Further, "soil corrections to remove the compressible soils will require excavations extending to a depth of approx. 19 to 24 feet and will require extensive dewatering". The proposed helical anchor system will extend through the compressible soils and bear on the underlying native dense sands and lean clays to support the main floor beam structure. The proposed new structure will replace an existing cabin and will be used by the family as a seasonal residence. The existing cabin is one of two summer residences located on the property and used by the family since 1925. No basement or crawl space wit[ be constructed below the main level of the new structure. The helical pier support system will be used to support 16" floor trusses at the main and upper levels of the residence. Minimal excavation or soil disturbance will be required. In consultation with structural engineer, Eric Bunkers, of Bunkers and Associates, the preliminary helical pier plan proposes the installation of approx. 50 helical piers to be used to support the structural beams and floor trusses. (See attached preliminary schematic plans, elevations and building section prepared by Laurel Ulland Architecture.) The footprint of the proposed new structure is approx. 2643.25 S.F. The 1and disturbing" activity related to the installation of the helical piers will be substantially less than 5000 square feet and will not involve grading, excavating, filling or the storage of soils on the site. Helical piers are "threaded" into the soil using a small bobcat. Existing and final grades will not change.