AGENDA River & Streams Board

Transcription

1 AGENDA 7:00 PM - Tuesday, March 7, 2017 Pickering Room, th Avenue NW, Issaquah WA Page 1. CALL TO ORDER 7:00 PM 3 a) Board Membership 2. APPROVAL OF MINUTES 7:05 PM 5-8 a) Minutes of July 19, AGENDA ITEMS 7:15 PM a) Introductions of Christopher Wright, Project Oversight Manager with DSD and Interim R&S Liaison and Keith Niven, DSD Director Presented by: Christopher Wright, Project Oversight Manager b) Project Updates Presented by: Christopher Wright, Project Oversight Manager and Keith Niven, DSD Director c) Membership/Term Expirations Presented by: Christopher Wright, Project Oversight Manager 4. OTHER BUSINESS / ANNOUNCEMENTS 8:00 PM 5. ADJOURNMENT 8:15 PM INQUIRIES Please contact Interim Liaison Christopher Wright at (425) or chrisw@issaquahwa.gov. Page 1 of 8

2 Meeting room is wheelchair accessible. American Disability Act (ADA) accommodations upon request. Please phone (425) at least two business days in advance. Note: Times listed for meeting topics are approximate and items are subject to change. Page 2 of 8

3 CALL TO ORDER a) About Created in 1983, this board advises the Mayor and City Council on how to protect, preserve and enhance the water quality in Issaquah s waterways, as well as protect the fish, birds and mammals that depend upon these aquatic environments. Membership The is comprised of seven regular members, with four-year terms; and several alternates, with two-year terms. All members are appointed by the Mayor and subject to confirmation by the City Council. Terms expire April 30 of the year listed. For more information, see IMC Staff Liaison Lucy Sloman, Land Development Manager Regular Members Leigh Bangs Tina Huff Cam Fisher Christian Nilsen Jeff Wood Rory Galloway Janet Wall Alternate Members David Berg Vacant Alicia Taylor Bill Mavros Meetings Unless otherwise posted: When 7:00 p.m. the first and third Tuesday of each month Where Pickering Room, th Ave. N.W. Page 3 of 8

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5 APPROVAL OF MINUTES a) CITY OF ISSAQUAH RIVER & STREAMS BOARD PUBLIC MEETING July 19, 2016 City Hall Northwest 7:00 PM th Avenue NW MEMBERS PRESENT Leigh Bangs Rory Galloway Janet Wall ADMINISTRATIVE STAFF PRESENT Kerry Ritland, Public Works Dept. Peter Rosen, Planning Dept. Dana Zlateff, Public Works Dept. VISITORS - Public Connie Marsh, Issaquah resident CALL TO ORDER: The Meeting was called to order at 7:05 PM. APPROVAL OF MINUTES: April 5, In the absence of a quorum, approval of the Minutes was forwarded to the next meeting. ITEM I NPDES PHASE II STORMWATER PERMIT: Stormwater & Land Use Code Amendments Staff Presenters: Dana Zlateff, Kerry Ritland Summary: The Western Washington Phase II Municipal Stormwater Permit, issued by Ecology. In 2012, Ecology added a requirement whereby all regulated jurisdictions must review, revise and make effective local development-related codes (etc.) to incorporate and require, where feasible, LID (low impact development). The intent is to make LID the preferred and commonly used stormwater approach, and for jurisdictions to adopt an updated stormwater design manual to be equivalent to Ecology s 2014 Stormwater Management Manual for Western Washington. Purpose of Meeting: To gather R&S Board and Public comments from review of the proposed code amendments supporting implementation of stormwater LID requirements in an updated stormwater design manual. Schedule for Amendments: R&S comments and recommendations go to PPC and Council. PPC meets August 11 (R&S invited). The amendments will be a September Council agenda bill. Page 5 of 8

6 APPROVAL OF MINUTES a) July 19, 2016 Page Review Summary of Changes: Discussion & Comments IMC Clearing, Grading, and Stormwater Management o Item #5: Change language from incorporate the soil protection requirements to reference the soil protection requirements. o Item #6 - Native Vegetation: The landscape code being referenced in the amendment doesn t distinguish or have a requirement to show native vegetation in development plans. Discussion: o Retaining Wall Criteria: Consider adding retaining wall height restriction, due to aesthetic, hydrology, and wildlife migration issues. (Ritland): We can look into whether it makes sense to add a height restriction. o Soil Retention: Is there a limitation on the amount of soil that can be removed? Is stockpiling (retention/reuse) of the native top soil required? Is it part of LID? (Zlateff): There is not a limit on removal, but a site assessment and management plan are required. Disturbing soils and bringing in amended soils require best management practices (BMPs). The objective is to have the assessment information up-front to enable advance planning for LID. o Wet Weather Work: We want to try to prevent things we know exist commonly on the valley floor, especially in wet weather. Issues such as high-table groundwater, sand boils, and perched groundwater on steep slopes have happened in the City. There is mention of infiltration, and grading in wet weather, but it s unclear how the information for the assessment flows to the planner to enable decision-making. Is there criteria? Is the LID assessment a tool? Is there a simplified report done? It s important the information is readily available and accessible, especially for wet weather work. (Zlateff): With a new project there is a detailed stormwater technical report done upfront in which all of the information is evaluated. The plan goes through SEPA and permitting. What s new in the amendments is that in order to continue site work after September 1, an updated winter work plan and BMPs must be submitted, reviewed and approved. We will add groundwater to the criteria. o Re-planting Vegetation in Cleared Areas: It says vegetation shall be restored within 7 days. In other places it says a year. 7 days is not feasible or reasonable, and a year is too long for cleared areas to remain incomplete. Look at clarifying that language. Page 6 of 8

7 APPROVAL OF MINUTES a) July 19, 2016 Page IMC 18 Land-Use Codes o Item #1: Pervious Pavers & Pavement: Use different language than the same qualities. Pervious pavers and pavement don t have the same qualities as impervious surface, and pervious pavers don t meet landscape code. In land-use code, the City doesn t give credit for pervious pavers. To avoid confusion, rename pervious and impervious requirements as a landscape requirement. Discussion: o Land-Use vs. Landscape Code: How are things prioritized? The land-use code has priority over the stormwater code, so if an area has high infiltration good for LID, but the land-use code requires you to build there, how does that play out? (Zlateff): In Central Issaquah where we have design standards, you still have to look at how LID can be used to the extent feasible, while not affecting the development objectives. LID feasibility criteria is spelled out in the stormwater design manual. In the end, you still must meet all stormwater treatment requirements, either conventionally or with LID (or a combination). Outside central Issaquah, stormwater takes priority. o LID in Central Issaquah: If there are landscape requirements in the land-use code that would preclude using LID for the landscape requirements when sites are 90% impervious with only 10% landscape area, you won t get LID if you can t do it in the 10% of the landscape. It needs to be clarified in the code, and without having to reference the stormwater manual, so expectations are known. (Zlateff): There were conflicts discussed during our work on the amendments, but that comment is not something that came up, so we need to hear this feedback. In some cases a rain garden may suffice for landscape, but if there s a restriction in the land-use code, such as street trees required, it could make LID unworkable. It does need to be more clearly stated in the code. o LID Stormwater Facilities in Buffers: The language regarding the criteria for deciding when buffer averaging is required is not clear enough, and there is a possibility it could be misinterpreted in the future. (Rosen): The only thing allowed without buffer averaging in terms of LID into buffers is native-vegetated LID, limited to rain gardens and bio-retention cells. LID vegetation must be appropriate/similar to wetland and stream buffers. Non-LID facilities, such as vaults and ponds, require buffer averaging. Buffer averaging criteria is detailed in the Planning code. Page 7 of 8

8 APPROVAL OF MINUTES a) July 19, 2016 Page In Summary: (Zlateff): These edits will go to PPC and Council. The next step is the packaging of submittal requirements for builders and how that information will be made available. In addition, the City is preparing revised maintenance and design standards, implementation methods, and outreach and education procedures. It s a process across various departments, due by the end of ADJOURNMENT: The Meeting was adjourned at 8:20 PM. The Minutes were submitted by Genie Benson, Recording Secretary Page 8 of 8