LP-19-00002 Suncadia Ph. 3 Div. 15 & 16 Index Master File

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Part 3 Stormwater Management Plan Introduction The preliminary Stormwater Management Plan for The Phase 3 Divisions 15 & 16 of the Suncadia Master Planned Resort (MPR)is described in this part. The Stormwater Management Plan reflects application of design guidelines detailed in the Department of Ecology Stormwater Management Manuals as well as information presented in the April 1999 (Rev.July 1999) Master Drainage Plan (MDP)that was prepared by W&H Pacific for the MPR.The MDP outlines stormwater design procedures,guidelines,and protocols for the development. Updates to the MDP include: (1)adoption of the drainage standards set forth in Washington State Department of Ecology's Stormwater Management Manual for Western Washington August 2001 (DOE SMM), (2)an addendum to the MDP dated August 2002 that provides (a)water quality protocol information for golf course areas that discharge to surface waters,and (b)revision of golf course water quality protocol summary information for infiltration to conform with the detailed protocol information. Design specifics addressed in this part include: >Runoff rate/volume estimation methodology >Infiltration facility collection and conveyance >Water quality treatment >Overflow routing >Conceptual Stormwater Plan The proposed land use for the resort is shown in the General Site Plan for Phase 3.Phase 3 Divisions 15 &16 is located at the west end of Tumble Creek Drive,northwest of Divisions 6-9 and the Tumble Creek Golf Course. The Suncadia stormwater system will be owned, operated, and maintained by either the Suncadia Residential Owners Association,or the Suncadia Community Council,depending on the location within the resort.Construction of facilities will be by New Suncadia,L.L.C. February 2019 Phase 3 Divisions 15 & 16 Engineering Summary ESM Consulting Engineers,L.L.C.3 -1 \\Esm8\engr\ESM-JOBS\998\718\016\document\P3D15&l6 Eng Summ_Part 3.doc Index #11