Otak 11/23/2020 - Laserfiche WebLink

Assumptions • The influence methodology, including both scoring and weighting of individual factors as well as data analysis methods, will be developed in close consultation with the City. Methodology will be developed for a "pilot" basin with up to three rounds of review, and the final approved methodology will be applied to the remaining basins that will undergo one round of review. • Under Otak's direction for required content, the City will provide the cartography of Stormwater Management Influence maps, similar to the example maps provided by Otak from similar work developed by Otak for the City of Issaquah. • The City will provide a GIS shapefile of average daily traffic (ADT)for roadways. • The City will consolidate and screen comments from reviewers to provide basis of direction to Otak • One stormwater management influence map will act as a "pilot"with two rounds of review, and the final approved cartography will be applied to remaining basins to create maps that will undergo one round of review. Deliverables Otak • Methodology used for Stormwater Management Influence for Task 300 Final Memorandum (draft) • Add a Section in one basin plan in the 2017 SWCP to document tables, and a narrative summarizing the influence of the City's MS4 on the receiving water(draft). • Compile and address comments for steps above to document methodology in the Final Memorandum and tables, and the narrative in the basin plan summarizing the influence of the City's MS4 on the receiving water(final with up to three rounds of review). • Add a section in remaining basin plans, using the first as a template, to document tables, and a narrative summarizing the influence of the City's MS4 on the receiving water(final with up to one round of review). • List of basins to be considered further in the prioritization process for Task 300 Final Memorandum • "Pilot" map showing stormwater management influence factors (draft). • "Pilot" map showing stormwater management influence factors (final with up to two rounds of review). Everett • Finished Stormwater Management Influence Maps • Digitize the ADTs of interest. The threshold for the ADT of interest will be the same as that used in the stormwater management influence methodology for water quality. 240 Assess Relative Conditions and Contributions This Task corresponds with step 4 on page 8 of the SMAP Guidance. The purpose of this task is to narrow the number of receiving waters and basins to a candidate list to include in the Receiving Water Prioritization process. 1. Relative conditions of receiving waters and contributions of basins shall be assessed as follows: a. Each basin will be assigned a management strategy for flow and water quality based on the Puget Sound Watershed Characterization Project (PSWC). The management strategy for the dominant assessment unit representing the basin within City limits will be assigned. The available strategies include protection, restoration, conservation, and development for flow and protection of sources processes, restoration of source processes, protection of sinks, and restoration of sinks for water quality. b. Workshops will be held with the City to pick one representative element for flow and one representative element for water quality for each basin. Based on the workshop, management strategies will be tabulated and documented in a map. One map and one table will be prepared to be inserted into chapter 2 of each watershed plan. One table showing the representative flow and representative water quality strategies for all basins will also be compiled in the Final Memorandum. Receiving Waters Assessment and Update of Surface Water Comprehensive Plan 6 Scope of Work Otak