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Home My WebLink AboutExhibit 13_Caswell-Brown-Village_TripGen_Letter_signed 1325 SE TECH CENTER DR, STE 140, VANCOUVER, WA 98683 ▪ 360.695.3488 MAIN ▪ 866.727.0140 FAX ▪ PBSUSA.COM August 3, 2023 Charles Hitchcock Office of Rural and Farmworker Housing 1400 Summitview Avenue, Suite 203 Yakima, Washington 98902 Via email: charlieh@orfh.org Regarding: Trip Generation Letter Caswell-Brown Village 142 Mill Road Port Townsend, Washington 98368 PBS Project 78138.000 Dear Mr. Hitchcock: This letter presents the information for a trip generation letter supporting the proposed Caswell-Brown Village development in Port Townsend, Washington. This trip generation letter is prepared for submission to Jefferson County. PROJECT DESCRIPTION The Caswell-Brown Village development is located at 142 Mill Road in Port Townsend, Washington. This development proposes a 50-bed emergency shelter with permanent supportive housing. There is currently an existing 40-lot park consisting primarily of recreational vehicles (RV) and tiny shelters to provide housing for persons experiencing housing insecurity. The tiny shelters are referred to on the site plan (see Figure 1) as “tent structures” and will contain wood walls and wood roofs. Electricity will be the only utility provided to the tiny shelters. The 11,830-square-foot emergency shelter is designed with a communal kitchen and bathrooms, two common rooms, 24 emergency shelter beds, and 16 permanent supportive housing units consisting of three one-bedroom units and 13 single-room occupancies serving very low-income individuals suffering chronic housing instability. The 40-bed shelter is planned with flexible space to support up to 75 individuals during peak weather emergencies and will include staff quarters with 27 parking stalls in the upper portions of a 21.8-acre parcel shared with an approved temporary housing facility (THF). TRIP GENERATION The number of trips generated for the new proposed development is based on the Institute of Transportation Engineers’ (ITE) Trip Generation Manual, 11th edition (September 2021) land use code 223 (Affordable Housing). The subcategory used for this land use is based on income limits, and the independent variable is assumed one resident per unit. The trip generation results for the existing 40 units, the proposed 50 units, and all units combined are summarized in Table 1. The site trips are presented for the average weekday, the AM peak hour between 7:00 am and 9:00 am, and the PM peak hour between 4:00 pm and 6:00 pm. Charles Hitchcock Trip Generation Letter, Caswell-Brown Village August 3, 2023 Page 2 of 3 78138.000 Table 1. ITE Trip Generation – Caswell-Brown Village Land Use (ITE Code) Affordable Housing (223) – Existing Affordable Housing (223) – New Affordable Housing (223) – Total Independent Variable Residents Residents Residents Size 40 50 90 Average Daily Trips (ADT) 58 73 131 Peak Hour Trips AM Peak Hour PM Peak Hour AM Peak Hour PM Peak Hour AM Peak Hour PM Peak Hour In 2 4 3 5 5 8 Out 5 1 6 2 11 4 Total Trips 7 5 9 7 16 12 Caswell-Brown Village development is anticipated to generate 131 vehicle trips during a typical weekday, 16 during the AM peak hour, and 8 during the PM peak hour. SEPA CHECKLIST The Transportation section of the State Environmental Policy Act (SEPA) Environmental Checklist was reviewed and responded to based on the project’s trip generation. Section 14 f. How many vehicular trips per day would be generated by the completed project or proposal? If known, indicate when peak volumes would occur and what percentage of the volume would be trucks. What data or transportations models were used to make these estimates? • The number of average daily trips for the existing site is 58, and the new proposed structure will add 73 new average daily trips to this development. A total of 131 average daily trips were calculated for this development. The peak volumes take place during the average weekday between 7:00 am to 9:00 am and 4:00 pm to 6:00 pm. Based on typical daily conditions, the percentage of the volume of trucks is assumed to be 0% based on land use type. This information is based on the ITE Trip Generation Manual, 11th edition. Section 14 h. Proposed measures to reduce or control transportation impacts, if any: • There are no proposed measures to reduce or control transportation impacts due to the low trips generated by the project. It is understood that residents of the proposed sites are not reliant on personal vehicles for transportation. The existing multiuse trail provide a direct connection to Port Townsend services. Based on the results of this trip generation analysis, and review of Jefferson County traffic impact analysis (TIA) technically complete checklist, no TIA is required. Charles Hitchcock Trip Generation Letter, Caswell-Brown Village August 3, 2023 Page 3 of 3 78138.000 CLOSING Please feel free to contact me at 360.567.2117 or john.manix@pbsusa.com with any questions or comments. Sincerely, John Manix, PE Senior Traffic Engineer Attachment(s): Figure 1 – Site Plan Trip Generation Calculations ES:JAM:tls PROPOSED RV AND TENT SITE (83,600 SF) PHASE IIa, PAHSE IIb N E W E N T R Y D R IV EMILL ROAD(E ) R E S E R V E S E P T IC D R A IN F IE L D F O R L O W E R V IL L A G E 1 6 0 X 6 5 PROPOSED PRIMARY SEPTIC DRAINFIELD FOR SHELTER + HOUSING FACILITY200' X 100'(E) LARRY SCOTT TRAILF A C IL IT Y E N T R Y D R IV E PROPOSED PEDESTRIAN CONNECTOR 142 MILL ROAD PORT TOWNSEND 001162001N 07*08'47" E337.02'S 88*01'15" E 104.54' N 4 1 * 1 9'3 9 " W7 4 6. 8 0'S 2*01'25" W 707.57' N 87*58'35" W 986.21'NEW DRIVEWAYE X IS T IN G D R IV E W A Y LIMITS OF EXISTING RV AND TENT SITE (PHASE IIa, IIb) LIMITS OF PHASE I RV AND TENT SITE (41,350 SF)(N) DRAINFIELD160X65P R O P O S E D S H E L T E R A N D H O U S IN G F A C IL IT Y PROPOSED GRAVEL PARKING LOT (10 VISITOR SPACES) (2219 SF) 16 % 6% 1 6%14%2 5 %2 2 %6% 6%6%3 %(E) VEGETATED SWALE STORMWATER RETENTION BASIN PRESERVED STORMWATER DISPERSION AREA 5 %7%8%9%10 %6%(E) LARRY SCOTT TRAIL(E) LARRY SCOTT TRAILW W W W W W W W W S P P P P P P P PARKING PARKING/ SERVICE APPROX. OUTLINE OF EXISTING FORREST BUFFER, TYP. SEPTIC TANK ARRAY 38X16 LIGHT POLE, TYP. P 30' - 0" MIN. P R O P O S E D R E S E R V E S E P T IC D R A IN F IE L D F O R S H E L T E R + H O U S IN G F A C IL IT Y 2 0 0 ' X 1 0 0'1 0'- 0 " MI N. 1 0 '-0 " M IN .1 0 '-0 " M IN .PROPOSED STORMWATER DISPERSION AREA (E) VEGGETATED LANDSCAPED BUFFER TO REMAIN, TYP. MAINTAIN EXISTING 30' VEGETATED BUFFER 55' - 0"26' - 0" W CENTRAL FACILITIES BLDG. GATHERING AREA (COVERED) EMERGENCY TURN AROUND ISSUED SETS TITLE PERMIT # DRAWN CHECKED ISSUE DATE JOB NO. SHEET NO.: 117 S. Main St., Suite 400 SMR Architects Seattle, WA 98104 PH: 206.623.1104 FX: 206.623.5285 SDCI STAMP REVISIONS / NOTES DATE DESCRIPTIONNO SDOT # MUP #2/24/2023 10:04:06 AMG001.1 KEY SITE PLAN 10/17/22 22032 GG/SS JD/GG 142 Mill Road Port Townsend Washington 98368 Caswell-Brown Village NO DATE DESCRIPTION SCALE: 1" = 60'-0"1 KEY SITE PLAN T.W. 3'-6" TYP. T.W. 3'-6" TYP. OUTLINE OF ROOF OVERHEAD OUTLINE OF ROOF OVERHEAD FULL LITE DOOR FULL LITE DOOR VCT VCT VCT VCT FLOORING IN SLEEPING ROOMS, TYP. DW REFFRZWORK SURF 4' X 8' 158 SF FOOD PREP 1062 SF COMMON ROOM 1251 SF COMMON ROOM 271 SF OFFICE 111 SF PRIVATE ROOM 73 SF STAFF RR 160 SF JAN + STORAGE 152 SF LAUNDRY 150 SF WATER 160 SF MECH 161 SF ELEC 436 SF KITCHEN 993 SF MEN'S SHELTER 137 SF PRIVATE ROOM 137 SF PRIVATE ROOM 995 SF WOMEN'S SHELTER 195 SF ENTRY 428 SF FAMILY UNIT 426 SF FAMILY UNIT 429 SF FAMILY UNIT 137 SF P.S.H. UNIT 137 SF P.S.H. UNIT 82 SF STORAGE 93 SF P.S.H. UNIT 94 SF P.S.H. UNIT 94 SF P.S.H. UNIT 94 SF P.S.H. UNIT 94 SF P.S.H. UNIT 94 SF P.S.H. UNIT 94 SF P.S.H. UNIT 94 SF P.S.H. UNIT 94 SF P.S.H. UNIT 95 SF P.S.H. UNIT 82 SF RR/SHOWER 81 SF RR/SHOWER 81 SF RR/SHOWER 82 SF RR/SHOWER 81 SF RR/SHOWER 81 SF RR/SHOWER 81 SF RR/SHOWER DW SPACE FOR FOOD WARMER PREP WASHRANGESTAFF STORAGE OPENOPEN ISSUED SETS TITLE PERMIT # DRAWN CHECKED ISSUE DATE JOB NO. SHEET NO.: 117 S. Main St., Suite 400 SMR Architects Seattle, WA 98104 PH: 206.623.1104 FX: 206.623.5285 SDCI STAMP REVISIONS / NOTES DATE DESCRIPTIONNO SDOT # MUP #2/24/2023 10:04:00 AMA101 LEVEL 1 FLOOR PLAN 12/28/18 22032 Checker Author 142 Mill Road Port Townsend Washington 98368 Caswell-Brown Village SCALE: 1/8" = 1'-0"1 LEVEL 1 0 4'8'16' NO DATE DESCRIPTION