CCSD #1 Stormwater Design Standards
-Stormwater Design Standards Update
WES is updating the Stormwater Design Standards and incorporating a Low Impact Development Approach (LIDA) to mitigating the effects of development on the environment. These Design Standards revisions will assist WES staff and the development community with processes such as site planning, facility design, and engineering method selection. The Standards will utilize a user-friendly approach to design in order to facilitate the incorporation of LIDA into development plans. Below is the current schedule for the project.
Design Standards Project Schedule
- Dec. 2, 2009 – Design Standards Workshop with members of the development community.
- Dec. 2-9, 2009 – Developer comment period on materials presented at the Dec. 2 workshop
- March 2010 – Public Outreach on draft design standards.
- April-May 2010 – Standards Finalized
- April-May 2010 – Training on New Facilities Sizing Tool
- July 1, 2010 – New Standards are implemented.
Project Budget is $149,000
-Hydromodification Tool Development
WES will be developing a BMP sizing tool to facilitate the integration of LIDA into our Stormwater Design Standards. The purpose of this tool is to address the impact of hydromodification on streams within the District. Hydromodification is loosely defined as the impact of excessive stormwater runoff and subsequent channel incision that occurs in streams in urban areas.
This easy-to-use sizing tool will provide the development community and WES staff with a consistent method for sizing LIDA facilities which will protect receiving streams from hydromodification impacts. WES would be the first jurisdiction in Oregon to address hydromodification. WES is applying for a DEQ 319 Grant to partially cover the cost of the project. WES is gathering letters of support from our co-permittees, as well as Clean Water Services, and the Cities of Gresham, Damascus, and Happy Valley. Project completion date will coincide with the implementation of the Stormwater Design Standards (July 2010).
Project Budget is $150,000