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Home My WebLink About23_24_25_Environmental Report Terracon Consultants Inc. 21905 64th Ave W Mountlake Terrace, WA, 98043 P 425-771-3304 F 425-771-3549 terracon.com August 14, 2015 Mr. Jon Blaha Ryan Companies US, Inc. 50 South Tenth Street, Suite 300 Minneapolis, MN 55403-2012 RE: Confirmation of Environmental Setting Approximate 25.88-Acre Area Lots 9-10, 15-19, and Tract C, Boeing Longacres Park Renton, King County, Washington Dear Mr. Blaha: Terracon Consultants, Inc. (Terracon) has been retained by Ryan Companies US, Inc. (Ryan) to provide confirmation of the general environmental setting for the approximate 25.88-acre vacant parcel legally described as Lots 9-10, 15-19, and Tract C of Boeing Longacres Park, City of Renton (City), King County, Washington (the Property). The Property includes the entirety of King County Tax Assessor Parcel Numbers 0886700090, 0886700100, 0886700150, 0886700160, 0886700180, 0886700190, 0886700380, and 0886700170. The Property is located in part of the south ½ of Section 24, Township 23 N, Range 4 E and is north of SW 27th Street and west of Oakesdale Avenue SW. Per your request, Terracon has prepared this letter to summarize our findings regarding the potential for wetlands, streams, lakes, and critical habitat to be present at the Property. Information reviewed by Terracon for these findings was limited to available on-line resources and/or from prior reports provided to Terracon from Ryan. Wetlands Terracon reviewed the National Wetlands Inventory (NWI) map, published by the U.S. Department of the Interior Fish and Wildlife Service (see attached). The NWI map did not identify a wetland area on the Property. Freshwater Forested/Shrub wetlands and Freshwater Emergent wetlands were identified on the east-, west- and south-adjoining properties respectively, approximately 80 to 300 feet from the Property boundary. A report entitled “Longacres Office Park, Surface Water Management Project, Conceptual Wetland Mitigation Plan” prepared for Boeing Commercial Airplane Group (Boeing) by Shapiro and Associates, Inc. (Shapiro); dated August 1998 (Shapiro Report) was prepared for a 164-acre parcel which included the Property. No wetland areas were identified on the Property. In addition, a flood insurance rate map (FIRM) for the Property (see attached) identifies a 100-year floodplain, Zone AE, in close proximity to the northwestern Property boundary, which may extend onto the Property. The base flood elevation shown on the FIRM for Zone AE is 16 feet above mean sea level. Southern portions of the site are located within Zone X, outside the 100-year or 500-year flood zones. Mr. Jon Blaha August 14, 2015 Page 2 of 3 It should be understood that the Shapiro Report was performed in 1998. As such, Terracon infers that the information may be subject to change following a current review by a wetlands professional, if required. Terracon did not field verify the Shapiro Report findings and provided a review of the third party work on the behalf of Ryan. Stream and Lakes The Property is currently characterized by generally level topography with general gradient toward the northeast. Based on the topographic map, the elevation of the Property is approximately 20 feet NGVD. Review of the topographic map and visual observations of the Property did not identify streams or lakes. Several areas of surface water were observed on the central portion of the Property which appeared to be the result of seasonal rain events or surface water runoff. No readily apparent low-lying areas and/or wetlands are known to be or have been reported to be present on the Property. A copy of the USGS 7.5-minute Renton, Washington, topographic quadrangle map dated 1994 is attached. Habitat Data Terracon reviewed information from the U.S. Fish and Wildlife Service (USFWS) and the Washington Department of Fish and Wildlife (WDFW) online databases to identify the potential occurrence of critical habitat and federally- and state-listed threatened and endangered (T&E) species located in the Property vicinity. Terracon conducted a preliminary review using the USFWS Information, Planning and Conservation System (IPAC) Endangered Species Act species list to identify species of concern determined by the activities proposed at the Property. Based on a review of the website, the IPAC list indicates that there are ten protected species that may occur in King County. No T&E species were reported on the Property in information obtained from either agency. Based upon a review of the online USFWS and WDFW databases, there are no critical habitats mapped on the Property, and the nearest habitats are mapped on the Green River approximately 1,100 feet to the west and a small creek approximately 800 feet to the east and south. These habitats are associated with bull trout and salmon, these species or their suitable habitat are not present on the Property. A copy of the WDFW Critical Habitat map is attached to this letter. A review of the WDFW Priority Habitats Section (PHS) webpage indicated that no PHS features (species occurrences, nesting areas etc.) are identified at the Property. A report entitled “Boeing Longacres Office Park, Property Disposition Report (PDR), Renton, Washington” prepared for Boeing Shared Services Group by WHPacific, dated October 2008 (WHPacific Report) was for the 154-acre Boeing Longacres facility, which encompassed the Property. A review of the WHPacific Report indicated that a wildlife corridor was identified through the Environmental Impact Statement (EIS) which extended through the central portion of the Property (Tract C). The report noted that the corridor was originally designated to provide for stormwater treatment, wetland mitigation and wildlife habitat; however no easements or deed restrictions were present within the corridor. N Project Mngr: Approved By: Checked By: Drawn By: Project No. Scale: Date: File No. Exhibit Consulting Engineers and Scientists 21905 64th Avenue W., Ste 100 Mountlake Terrace, WA 98043 FAX. (425) 771-3549PH. (425) 771-3304 TOPOGRAPHIC MAP Boeing Longacres Lots 9-10, 15-19, Tract C SW 27th Street & Oakesdale Ave SW Renton, King County, Washington 1 June 2015 *.dwg as shown 81157731 CJP MYW MYW USGS Renton WA Quadrangle, published1994.LEGEND: APPROXIMATE SITE BOUNDARY SITE Mar13,2015Thismapisforgeneralreferenceonly.TheUSFishandWildlifeServiceisnotresponsiblefortheaccuracyorcurrentnessofthebasedatashownonthismap.AllwetlandsrelateddatashouldbeusedinaccordancewiththelayermetadatafoundontheWetlandsMapperwebsite.UserRemarks: Sou rce: Esri, DigitalG lo be , G eo Eye, Ea rt hstar Ge og ra ph ics, CNES/Airb usDS, USDA, USGS, A EX, Ge tmapp ing, A erog rid , IG N, IGP, swisstop o, and PH S Re po rt C lip Ar ea PT LN AS MAPPED SECTION QTR -TW P TO WN SH IP Ju ne 2 , 20 15 0 0.3 0.60.15 mi 0 0.55 1.10.275 km 1:19,8 42 WDFW