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CENTER STREET AREA FRAMEWORK + POLICY PLAN <br />v SOLAR 'CRT <br />MAINTENANCE ACCrS." <br />r44,r,,,nrt9y <br />1;�d1U tlODJ': <br />!11III19L!fifil;4 <br />CONCRETE WALK <br />6rrUM PIOUS PAVEMENT <br />'EL LAWN/II„ANN,VA A!'IN:. <br />TOW WATER CAT'ICYIMENT PLANTER <br />STCRNI WALE R RE U'.iIE' & IRRIGA'1 VON <br />... STORMNIATER COLLECTION X UNOERGROYINO STORAC' <br />Stormwater Management System <br />PROJECT DESCRIPTION <br />Bolton & Menk, has completed a preliminary study that analyzes the feasibility of integrating <br />stormwater reuse for irrigation of the proposed Municipal Plaza and adjacent Center Street <br />landscape improvements. The reuse system envisioned will include best management <br />practices to collect and treat runoff, storage tanks to store the runoff, and a pump station <br />and piping to convey reuse water to irrigation areas and surface water features. Most of the <br />stormwater runoff will be generated from Center Street NW and the sidewalks on either side <br />of the road. Stormwater runoff is proposed to be collected and treated by a combination of <br />tree vaults and rain gardens located within the boulevard and parking 'bump -outs on both <br />sides of the street. It is assumed that the runoff would drain directly into each of the rain <br />gardens and tree vaults through surface capture systems (i.e.. curb cuts). <br />Water collected and stored within the storage tanks will discharge via gravity flow to the <br />�IPI,4INIVVIimlu <br />11IdNI°tlI,Ij1 NIId�y!VIvIN"di�Ili�f�'li� <br />pump house wet well, where it will be filtered <br />and treated. The Metropolitan Council <br />Storm water Reuse Guide Water Balance <br />Tool for Constant Irrigation Demand was <br />used to determine the percent of time <br />the stormwater reuse system would be <br />functioning, and assumed 1" of water over <br />the irrigable area per week is required for <br />adequate vegetation growth and health. <br />Preliminary estimate of potential <br />construction cost: $800,000 - 950,000 <br />27 <br />