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1 Woodthrush Trail Orchard Park, NY 14127 Contact Person: Brian Hillery Telephone: 716-512-3425 104 PROJECT DESCRIPTION This new development project involves the construction of three (3) 4-unit, one (1) 5-unit and two (2) 6- unit ranch style townhomes, for a total of 29 units. Construction will also consist of associated parking, storm water management, utility, lighting, and landscaping improvements. The site is currently vacant consisting of grass, brush and tree cover. The total area of the site is 16.59 acres with an area of disturbance of approximately 7.37 acres. The site has been rezoned to C-1(S) to allow for the development. Soil disturbing activities will include: A. Construction of temporary construction exit points B. Clearing & grubbing of the site within disturbance limits C. Installation of the detention basin & bioretention areas including topsoil & seed D. Installation of storm sewer pipes and inlets E. Construction of utilities F. Construction of curb and parking lot G. Final grading & landscaping H. Construction of buildings This project is owned by Brian Hillery and William Sahlem and will be developed by the same. The work area consists of approximately 7.37 acres for which erosion and sediment controls have been developed and fully addressed in this written plan and the Erosion and Sediment Control Plans. See the construction documents for additional details. 105 RUNOFF COEFFICIENT, SOILS, AND RAINFALL INFORMATION The initial runoff curve number for the pre-construction site is "CN" = 80. The post-construction runoff curve number for the site will be "CN" = 88. The site is 7.37 acres of which approximately 7.37 acres will be disturbed by construction activities. The site is in Erie County, which receives an average of approximately 45 inches rainfall annually with the highest amounts of rainfall received in the months of May through September. Annual snow for this area is approximately 120 inches. 106 WATERS The runoff generated from this site will discharge to existing wetlands on the west side of the project site. Runoff is eventually discharged to Smoke Creek. Multifamily Development 5/26/26 Page 9 of 23 Page 575 of 849