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ORONO — SURFACE WATER MANAGEMENT PLAN 5 System Descri ption 5.1 GENERAL The Orono Surface Water Management Plan (SWMP) adopted in 2002 involved a detailed delineation of drainage patterns within Orono's municipal boundaries for the purpose of describing future ponding and conveyance systems to serve development. Though much development has occurred, this system description is still useful for understanding the connectivity between drainage systems and subwatersheds or major drainage districts. The City of Orono was divided into eighteen major drainage districts as shown on the Surface Water System Map (Map 1), at the back of the report, and designated as shown in Table 5.1. Table 5.1 - Major Drainage Districts Drainage District Abbreviation Drainage District Abbreviation Browns Bay BB Maxwell Bay MB Carman Bay CB Mooney Lake MO Crystal Bay CY North Arm NA Forest Lake FL Painters Creek PC French Lake FR Peavey Lake PL Hadley Lake HA Smith Bay SM Lafayette Bay LF Stubbs Bay SB Lake Classen LC Tanager Lake TL Long Lake LL West Arm WA All drainage districts are within MCWD. Each of the drainage districts was then further subdivided into subdistricts identified by initials of the drainage district in which they reside followed by a number. Generally, the numbering system starts at the upstream end of the district and increases toward the outlet. Areas for the subdistricts are presented in Appendix A. SYSTEM DESIGN The runoff management system depicted on the map is based on the anticipated"fully developed"conditions. Runoff data used for system design are derived from City staff projections for planned land use changes identified in the 2008-2030 Orono Communiry Management Plan. In regards to future development the system has been designed to meet two primary criteria: City of Orono Page 51 Surface Water Management Plan �Bonestroo 000139-09034-0