3003 W CASINO RD BLDG 45-12 2016-10-20

From: McGuire, Peter D [mailto:peter.d.mcguireCaboeing.com] Sent: Tuesday, October 07, 2014 1:38 PM To: Dave Tyler; Jane Zimmerman Cc: Gomez, Martin H; Larmay, Russell T; Sugino, Alan K Subject: RE: Pre-Application Meeting For new Flightline Hangar Where to begin about the Alpha Pond......there is a lot to say. Jane, we are also meeting with Paine Field and Reid Middleton, our consultant, at the airport office on Thursday from 10:30—11:30. We would love to have you join us and I'll send you the meeting notice if you are available. To begin,the attached file shows the areas that we have plans to pave: 1) The first project,the static Test facility, is within the City limits of Everett. It is an airplane hangar and ramp. The total area is 6.61 acres. A portion of the area is currently a parking lot with the balance mainly grass. The area is shown as impervious area in our Master Plan and we believe that there was a drainage plan in place so area may likely be considered vested. 2) The second area is an office building and parking lots at the Bomarc Site which is in the jurisdiction of Snohomish County. It is approximately 12.66 acres of addition impervious surface. Per discussion with the airport, it is vested for detention, but will require treatment. Issues: • Both areas drain to Paine Field's Alpha Pond. Even though both areas are thought to be vested in terms of stormwater detention,the Alpha Pond will likely need to be modified in order to detain the flow for both projects. • Just a little history, as part of the 1991 EIS, Boeing paid to resize the Alpha Pond which is owned by Paine Field to accommodate the entire Flightline Expansion including the area we are now planning to develop. We assume that there was a drainage plan in place at the time, but we need to have our consultants verify that. • That being said,somewhere along the way, Paine Field may have changed the drainage plan for their site,to include additional airport area and they may have removed our undeveloped Flightline area from the calculations for the Alpha Pond. • To complicate matters even more, if the Alpha Pond needs to be modified, it may or may not be considered a wetland. It is currently not classified as such by Ecology or on County records, but there seems to be some confusion about it because it was built as a "constructed wetland"to function as a pond. Attached is an email with a letter from the Corps of Engineers that considered it a "constructed wetland" as well as a more recent delineation by URS that calls it a wetland. Jane, if the stormwater will be detained in Paine Field's Alpha Pond, our question for you is what will your involvement be in the review process? We would like to keep you tied in as much as you would like to be. Thanks, Pest& Mc4w4-e- Pete McGuire The Boeing Company