2012-08-28_PWETC_AgendaPacket - Laserfiche WebLink

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efficient use of community resources. It is a complicated concept that includes many facets of City government and includes areas such as waste reduction, water conservation, and carbon - emission reduction. Nature is a good example to follow as it works to reduce runoff volumes by infiltration, reduce soil loss through vegetation, enhance habitat, and reduce pollutants in storm runoff by infiltration and biological uptake. When we develop land, we change the natural system. Often, we increase both the peak runoff rate as well as the volume of runoff. The increase in both developed runoff rate and volume can be harmful to downstream channels, resulting in degradation. This degradation has effects on habitat as well as water quality by increasing sediment loads. In addition to increasing runoff, we also introduce new sediment loads and pollutants into the natural system through the development process. During construction, we can introduce new sediment loads by exposing previously vegetated soil. After development is completed, we often see a whole new set of pollutants in storm runoff. The primary objectives of stormwater sustainability are to mitigate these changes to the natural system. The City goals and policies for sustainable stormwater management area listed in Table 13. Table 13 Goal 7 — Sustainability Goal Statement: based on the both capital overall costs water resources. Achieve the water quality and water resources needs of the City foundation of efficient use of community resources. In this approach costs and long-term operational costs will be considered as well as the of given project . . protection an. . of Policy No. Goal 7: Sustainabilit — Policies 1 The City will use the recently completed Stormwater Reuse Guide (Metropolitan Council, Fall 2011) as a guide in considering water reuse on City projects. 2 The City will strive to incorporate construction, building, and landscape designs that mimic natural systems, and infiltrate, retain, detain rainfall onsite, or can reduce excess flows into our sewers, streets, and waterways. 3 The City shall consider using trenchless technologies to reduce the impact on the ground surface and expose less disturbed area to erosion and runoff when appropriate. 4 The City shall consider tree trenches for stormwater treatment and encourage the installation of trees in boulevards and parking lots for stormwater management. 5 The City shall seek to collaborate efforts with the Parks Renewal Program and incorporate multi -use green space. 6 The City shall endeavor to incorporate pretreatment, treatment trains, and maintenance access for new and retrofit public stormwater treatment facility projects. Comprehensive Surface Water Management Plan ROSEV120222 City of Roseville Page 26