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HomeMy WebLinkAboutRS_Trip_Generator_Memo_220812_v1 TENW Transportation Engineering NorthWest Transportation Planning | Design | Traffic Impact & Operations 11400 SE 8th Street, Suite 200, Bellevue, WA 98004 | Office (425) 889-6747 MEMORANDUM DATE: June 27, 2022 TO: Nathan Janders City of Renton FROM: Amy Wasserman TENW SUBJECT: Trip Generation Memo for the proposed Seattle Sounders FC Headquarters and Training Facility PRE21-000410 TENW Project #2022-073 This memorandum summarizes the preliminary traffic information for the proposed Seattle Sounders FC Headquarters and Training Facility located in and around Building 25-20 on a portion of the Longacres Office Park („LOP‰) property in the City of Renton (see Attachment A vicinity map). This memo includes a project description and trip generation estimate. We are requesting your review and approval of this information. Background The approximately 108-acre LOP is composed of 18 parcels located west of Oakesdale Ave SW in Renton, Washington. The Sounders „Site‰ is located within seven of these parcels. Building 25-20 is an existing five-story office building located within the LOP at on parcel no. 088670- 02220 and is approximately 237,532 square feet (net). Building 25-20 has an established headquarters office use with 2,100 average daily trips approved and fully mitigated.1 As background, the City of Renton has conducted extensive environmental review, including traffic analysis for the full buildout of LOP. The Environmental Impacts Statement („EIS‰) Mitigation Document for the LOP was issued in May 1995 and included a Transportation Mitigation Conditions Agreement that, among other conditions, required Boeing to pay the City transportation mitigation fee based on 27,000 average daily trips to be generated by full development of the LOP. The City and the former site owner later established a Reserved Account that contains „Prepaid Trips‰ for future development at LOP. This memorandum supplements the previous LOP transportation review. 1 King County Recording No. 20060420001031, Recital D. Trip Generation Memorandum Seattle Sounders FC Headquarters and Training Facility (Renton) TENW June 27, 2022 Page 2 Project Description The proposed Seattle Sounders FC Headquarters and Training Facility project encompasses 52,990 square feet (SF) in the existing Building 25-20. The Sounders will retain 21,660 SF as office use while converting 31,330 SF of existing office use to Recreation Facilities, Indoor use. The indoor recreational facilities will provide team services space, which is intended to be accessory to the office and outdoor recreation facilities uses and would include locker rooms, training space, classrooms and workspaces, and medical treatment rooms. The proposed project will also establish an outdoor recreational facility use with five outdoor soccer fields, a goalkeeper training area, and a maintenance shed. The proposed outdoor improvements and parking realignment associated with Sounders secure parking will remove 166 parking stalls. A supplemental parking study will be provided. Vehicular access to the site would remain the same as existing conditions, with one signalized access and one unsignalized access driveway on Oakesdale Ave SW that provide access to the main parking lot on the south side of the building, and one unsignalized access roadway that provides access to a visitor parking lot on the north side of the building. Secondary vehicular access will be provided via an existing full access driveway on 384th Ave SE. A preliminary conceptual site plan is provided in Attachment B. Project buildout and occupancy is expected by 2024. Trip Generation The weekday trip generation estimates for the proposed and existing office use were based on methodology documented in the Institute of Transportation Engineers (ITE) Trip Generation Manual, 11th Edition for Land Use Code (LUC) 710 (General Office Building). Based on information provided by the applicant and preliminary discussions with the City of Renton, the proposed outdoor soccer training facility is not consistent with a specific land use category established in the Institute of Transportation Engineers (ITE) Trip Generation manual. ITE LUC 488 (Soccer Complex) was considered, but was determined to not be appropriate to forecast trip generation for the proposed Seattle Sounders soccer training facility. As such, project-specific information was used for the average weekday trip generation estimates. To estimate trip generation for the proposed Sounders training facility, the owner provided detailed forecasts of trips anticipated to occur on a typical weekday based on their operational plan. These weekday trip estimates are provided in Attachment C and described in the following categories: Players/Field Use Trips – The fields are anticipated to be used daily from approximately 8:00 AM to 10:00 PM, however not all fields will be used at the same time. The peak usage of the fields and training facility is anticipated to occur between 10:00 AM and 1:00 PM. Spectators Trips (Media and Public Session) – On a daily basis, it is anticipated that media and a select number of visitors may view team practices on an invitation only basis. Summer Camp/Clinic Trips – Summer camps run June through August and would consist of a maximum attendance of 120 students per week, with camp/clinic hours generally between 9:30 AM and 4 PM Monday through Thursday and between 9:30 AM and 12:00 PM on Friday. Trip Generation Memorandum Seattle Sounders FC Headquarters and Training Facility (Renton) TENW June 27, 2022 Page 3 Weekly Soccer Program Trips – The weekly soccer program consists of a skills class that would have a maximum attendance of 50 students attending class 3 times per week during off peak hours (i.e. 5:30 PM to 7:00 PM). It should be noted that the project-specific trip generation forecasts for the soccer training facility on a typical weekday are reflective of the peak summer period (June through August) when summer camps/clinics are anticipated to be conducted at the site. The resulting new weekday daily, AM peak hour, and PM peak hour trip generation estimates associated with the proposed Seattle Sounders FC Headquarters and Training Facility development are summarized below in Table 1. The detailed trip generation estimates are included in Attachment C. Table 1 Project Trip Generation Summary Net New Trips Generated Time Period In Out Total Weekday Daily 73 74 147 Weekday AM Peak Hour -2 -7 -9 Weekday PM Peak Hour 56 -42 14 It should be noted that trips associated with the proposed 31,330 SF of building area for team services space are assumed to be included in either the office use or outdoor recreation facility use trip generation estimates and were therefore not estimated separately. Next Steps The proposed Seattle Sounders FC Headquarters and Training Facility project would generate less than 20 net new trips during the AM and PM peak hours, therefore we believe no additional traffic analysis is required for this development pursuant to the CityÊs direction in PRE21-000398 (Transportation, Item #5). We look forward to your review and approval of our trip generation estimates and consensus that no additional traffic analysis is necessary. Please contact me at (425) 466-7072 or mailto:amy@tenw.com if you have any questions regarding the information included in this memorandum. Attachments: A. Vicinity Map B. Preliminary Site Plan C. Trip Generation Forecasts and Calculations Trip Generation Memorandum Seattle Sounders FC Headquarters and Training Facility (Renton) ATTACHMENT A Vicinity Map Trip Generation Memorandum Seattle Sounders FC Headquarters and Training Facility (Renton) ATTACHMENT B Preliminary Site Plan XXXSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDx SDx SDx SDx SDx SDx SDx SDx SDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxWxWxWxWxWxWxWxWxWxWxWxWxWxWxWxWxWx WxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSDxSD x SDx SDx SDx SDxSDxSDx SDx SDxSDxSDxSDxSDxSDxSDx SDxSDxSDxSDx75x116 (225x348) 75x116 (225x348) 75x116 (225x348) 75x116 (225x348) 75x116 (225x348) P9 P10 P11 P12 P1 P2 P3P4P5P6 T1T2 T3 P8 T4 P7 A2 A1 NEW OPENING INEXISTING CURTAINWALLFOR OH SECTIONAL DOORNEW DOORS IN EXISTINGCURTAINWALLNEW DOORS IN EXISTINGCURTAINWALL42" DRINK RAIL30" DRINK RAIL (ADA)30" DRINK RAILEXISTING CARPORT CANOPY CUT BACKTO ALIGN WITH WEST BUILDING EDGEUPUPUP12 3 FIELD 1 NATURAL GRASS 97,360 SF FIELD 2 NATURAL GRASS 97,360 SF FIELD 3 SYNTHETIC TURF 97,360 SF 12'x12' BULK STORAGE (2)4 FIELD 4 SYNTHETIC TURF 97,360 SF 5FUTURE FIELD 5 SYNTHETIC TURF 97,360 SF WASH RACK FUTURE RESTROOM CONDITIONING / UTILITY SPACE NATURAL GRASS 51,492 SF 21032 © 2022 GENERATOR STUDIO LLC ISSUE DATE: PROJECT NO. DRAWN BY: CHK'D BY: SHEET TITLE 1 SEAL D 2345 C B A 4/4/2022 5:40:59 PM 21032 SEATTLE SOUNDERS FC HEADQUARTERS & TRAINING CENTER 1901 OAKESDALE AVENUE SW RENTON, WA 98057 REV DESCRIPTION DATE SEATTLE SOUNDERS FC 159 S. JACKSON STREET, #200 SEATTLE, WA 98104 SOUNDERSFC.COM TENANT GENERATOR STUDIO LLC 1615 BALTIMORE AVE KANSAS CITY, MO 64108 816.333.6527 GENERATORSTUDIO.COM ARCHITECT ARCHITECT: LICENSE NO. MICHAEL J. KRESS 12779 D.A. HOGAN & ASSOCIATES, INC. 1450 114TH AVE SE, SUITE 225 BELLEVUE, WA 98004 206.285.0400 DAHOGAN.COM LANDSCAPE ENGINEER COUGHLIN PORTER LUNDEEN (CPL) 801 SECOND AVENUE, SUITE 900 SEATTLE, WA 98104 206.343.0460 CPLINC.COM STRUCTURAL & CIVIL ENGINEER HENDERSON ENGINEERS 8345 LENEXA DRIVE, #300 LENEXA, KS 66214 816.663.8700 HENDERSONENGINEERS.COM MEP ENGINEER UNICO PROPERTIES LLC 1215 FOURTH AVENUE, SUITE 600 SEATTLE, WA 98161 UNICOPROP.COM OWNER / DEVELOPER F110 REF EJG LAYOUT PLAN 05.23.2022 SCHEMATIC DESIGN 50% NORTH 0 SCALE: 1" = 80' 40' 40' Trip Generation Memorandum Seattle Sounders FC Headquarters and Training Facility (Renton) ATTACHMENT C Trip Generation Calculations Land Use Size / Units ITE LUC 1 Trip Rate or Equation 1 Enter Exit Enter Exit Total DAILY Proposed: General Office Building 21,660 SF 710 Ln(T) = 0.87 Ln(X) + 3.05 50%50%153 154 307 Soccer Training Facility 2 ------50%50%254 254 508 Less Existing: General Office Building 52,990 SF 710 Ln(T) = 0.87 Ln(X) + 3.05 50%50%-334 -334 -668 Proposed Gross Daily Trips Generated =407 408 815 Less Existing Trips =-334 -334 -668 Total Proposed New Daily Trips =73 74 147 AM PEAK HOUR Proposed: General Office Building 21,660 SF 710 Ln(T) = 0.86 Ln(X) + 1.16 88%12%40 5 45 Soccer Training Facility 2 ------100%0%43 0 43 Less Existing: General Office Building 52,990 SF 710 Ln(T) = 0.86 Ln(X) + 1.16 88%12%-85 -12 -97 Proposed Gross AM Peak Hour Trips Generated =83 5 88 Less Existing Trips =-85 -12 -97 Total Proposed New AM Peak Hour Trips =-2 -7 -9 PM PEAK HOUR Proposed: General Office Building 21,660 SF 710 Ln(T) = 0.83 Ln(X) + 1.29 17%83%8 39 47 Soccer Training Facility 2 ------100%0%65 0 65 Less Existing: General Office Building 52,990 SF 710 Ln(T) = 0.83 Ln(X) + 1.29 17%83%-17 -81 -98 Proposed Gross PM Peak Hour Trips Generated =73 39 112 Less Existing Trips =-17 -81 -98 Total Proposed New PM Peak Hour Trips =56 -42 14 Notes: 1. Land Use Codes, trip rates, and directional splits from Institute of Transportation Engineers (ITE) Trip Generation Manual (11th Edition, 2021) unless otherwise noted. 2. Trip generation for the soccer training facility/team services based on user-specific trip generation forecasts provided by the Client. Sounders FC Office & Training Facility Weekday Trip Generation Estimates Directional Split 1 Vehicle Trip Generation 6/17/2022 Sounders FC Office & Training Facility Trip Generation Forecasts - Average Weekday during Summer Outdoor Recreational Facility Use Time Period Entering Exiting Comment Entering Exiting Comment Entering Exiting Comment Entering Exiting Comment Entering Exiting Comment Entering Exiting Total Hour Entering Exiting Total 12:00 - 1:00 AM 0 0 0 0 0 0 0 0 0 0 0 0 0 12:00-1:00 AM 0 0 0 1:00 - 2:00 0 0 0 0 0 0 0 0 0 0 0 0 0 1:00-2:00 AM 0 0 0 2:00 - 3:00 0 0 0 0 0 0 0 0 0 0 0 0 0 2:00-3:00 AM 0 0 0 3:00 - 4:00 0 0 0 0 0 0 0 0 0 0 0 0 0 3:00-4:00 AM 0 0 0 4:00 - 5:00 0 0 0 0 0 0 0 0 0 0 0 0 0 4:00-5:00 AM 0 0 0 5:00 - 6:00 0 0 0 0 0 0 0 0 0 0 0 0 0 5:00-6:00 AM 0 0 0 6:00 - 6:30 0 0 0 0 0 0 0 0 0 0 0 0 0 6:00-7:00 AM 0 0 0 6:30 - 7:00 0 0 0 0 0 0 0 0 0 0 0 0 0 6:30-7:30 AM 0 0 0 7:00 - 7:30 0 0 0 0 0 0 0 0 0 0 0 0 0 7:00-8:00 AM 0 0 0 7:30 - 8:00 0 0 0 0 0 0 0 0 0 0 0 0 0 7:30-8:30 AM 4 0 4 8:00 - 8:30 4 0 0 0 0 0 0 0 0 0 4 0 4 8:00-9:00 AM 43 0 43 8:30 - 9:00 4 0 0 0 0 0 35 0 0 0 39 0 39 8:30-9:30 AM 98 0 98 9:00 - 9:30 9 0 0 0 0 0 50 0 0 0 59 0 59 9:00-10:00 AM 121 0 121 9:30 - 10:00 20 0 12 0 30 0 0 0 0 0 62 0 62 10:00 - 11:00 0 0 0 0 0 0 0 0 0 0 0 0 0 10:00-11:00 AM 0 0 0 11:00 - Noon 0 0 0 0 0 0 0 0 0 0 0 0 0 11:00-12:00 PM 0 0 0 12:00 - 1:00 0 0 0 12 0 30 0 0 0 0 0 42 42 12:00-1:00 PM 0 42 42 1:00 - 2:00 0 20 0 0 0 0 0 0 0 0 0 20 20 1:00-2:00 PM 0 20 20 2:00 - 3:00 0 17 0 0 0 0 0 0 0 0 0 17 17 2:00-3:00 PM 0 17 17 3:00 - 3:30 10 0 0 0 0 0 0 20 0 0 10 20 30 3:00-4:00 PM 20 85 105 3:30 - 4:00 10 0 0 0 0 0 0 65 0 0 10 65 75 3:30-4:30 PM 15 65 80 4:00 - 4:30 5 0 0 0 0 0 0 0 0 0 5 0 5 4:00-5:00 PM 10 0 10 4:30 - 5:00 5 0 0 0 0 0 0 0 0 0 5 0 5 4:30-5:30 PM 65 0 65 5:00 - 5:30 10 0 0 0 0 0 0 0 50 0 5:30-7 camp 60 0 60 5:00-6:00 PM 60 0 60 5:30 - 6:00 0 0 0 0 0 0 0 0 0 0 0 0 0 5:30-6:30 PM 0 15 15 6:00 - 6:30 0 15 0 0 0 0 0 0 0 0 0 15 15 6:00-7:00 PM 0 20 20 6:30 - 7:00 0 5 0 0 0 0 0 0 0 0 0 5 5 7:00 - 8:00 0 5 0 0 0 0 0 0 0 50 0 55 55 7:00 -8:00 PM 0 55 55 8:00 - 9:00 0 15 0 0 0 0 0 0 0 0 0 15 15 8:00-9:00 PM 0 15 15 9:00 - 10:00 0 0 0 0 0 0 0 0 0 0 0 0 0 9:00-10:00 PM 0 0 0 10:00 - 11:00 0 0 0 0 0 0 0 0 0 0 0 0 0 10:00-11:00 PM 0 0 0 11:00 - 12:00 0 0 0 0 0 0 0 0 0 0 0 0 0 11:00 PM - 12:00 AM 0 0 0 TOTAL TRIPS 77 77 12 12 30 30 85 85 50 50 254 254 508 TRIP GENERATION SUMMARY Entering Exiting Total Daily Trip Generation 254 254 508 AM Peak Hour 43 0 43 8:00-9:00 AM PM Peak Hour 65 0 65 4:30-5:30 PM Hourly Trip Totals Trip Totals Summer Camps (June - August) 120 max attendance Soccer Program - Weekly Class 50 max attendance 3x/week - 24 weeksField Use (Players/Coaches) Spectators - Media 100 max attendance Spectators - Public Session 6/17/2022