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Exhibit D - TPR K KITTELSON 851SW 6th AVENUE,SUITE 600 & ASSOCIATES PORTLAND,OR 204 503 22852330 97F 503.273.8169 April 27, 2021 Project#: 26220 Scott Siegel City of Lake Oswego PO Box 369 Lake Oswego, OR 97304 RE:Zone Change Transportation Assessment—Boones Ferry Road Construction Staging Site Dear Scott, This letter provides a transportation assessment for the proposed zone change on the 1.37-acre site located in the southwest quadrant of the Boones Ferry Road/West Sunset Drive intersection. The site vicinity and existing zoning designation are illustrated in Figure 1 below. Figure 1—Site Vicinity and Existing Site Zoning Map I � ,, ..�. i 4 s A -etc ' ,' c coG. s l.4. v �6' s w _ v. R=2 5j ` /est Sunset Dr \ / o°en .; . I.,ems r CY7KLG�i2i ,6� JLGOC Rc,r: i:° o 8 N 79 i. .� .� WLG SC W _ .,.,. I 0...0 `:. r (all C-- �1N MF r o!� I *e.,.',;.. vzsr r r WLG a�nu Q.a i co 1 k \w rC WLG RMU 4 —1 SQ 1+ 1 r I coUlq �e��ec 44114 uppeC 0�\ve _M oozes O' vPper O r•( . 0 <bo • WLG R-2.5 A Image Source:Goog e Maps z upper Oc 1 Im oekbouF :j0Map The site consists of six, undeveloped lots that are currently being used for construction staging associated with the City's Boones Ferry Road Phase 1 Improvement Project'. As shown, the majority of the site is zoned WLG-OC (West Lake Grove Design District — Office Commercial) with two smaller portions zoned WLG-R-2.5 (West Lake Grove Design District — Residential Townhome) and WLG RMU (West Lake Grove Design District— Residential Mixed Use). 1 Building a Better Boones Ferry Road I Coming your way: a safer, more appealing Boones Ferry Road for all (oswego.or.us) FILENAME:H.•126126220-LAKE OSWEGO REZONEI REPORTI DRAFTI26220 REPORT DRAFT.DOCX Zone Change Transportation Assessment Project#:26220 April 2021 Page:2 To accommodate the City's near-term goal for affordable housing on the site,the entire site is proposed to be rezoned to allow one consistent WLG-OC designation.At the same time,the WLG-OC designation is proposed to be modified to allow housing. Table 1 summarizes the existing and proposed zoning details of the six individual lots that make up the study site. Table 1—Existing and Proposed Zoning Details Lot Address Acres Existing Zoning Proposed Zoning 21E07DC07400 5126 West Sunset Dr 0.16 WLG-OC WLG-0C' 0.05 WLG-R-2.5 WLG-0C' 21E07DC07300 5110 West Sunset Dr 0.11 WLG-OC WLG-OC' 0.10 WLG-R-2.5 WLG-OC' 21E07DC07200 16719 Boones Ferry Rd 0.34 WLG-OC WLG-OC' 21E07DC09200 16731 Boones Ferry Rd 0.18 WLG-OC WLG-0C1 21E07DC09100 16745 Boones Ferry Rd 0.17 WLG-OC WLG-0C1 21E07DC09000 16759 Boones Ferry Rd 0.17 WLG-OC WLG-OC' 0.10 WLG-RMU WLG-OC' With a modification that would allow residential development within the WLG-OC. OREGON TRANSPORTATION PLANNING RULE To comply with Oregon's Transportation Planning Rule (TPR) as documented in Oregon Administrative Rule 660-012-060, it must be shown that the proposed rezone/zone modification does not result in a significant effect on the transportation system. To test for a significant effect, the reasonable worst- case trip generation potential of the permitted land uses allowed under the existing and proposed zoning was evaluated.This comparison is documented in the following sections. Existing Zoning Trip Generation Site development trip estimates under the existing and proposed zoning were calculated using trip rates obtained from the Trip Generation Manual, 10th Edition (Institute of Transportation Engineers). To address the TPR, a trip generation estimate was prepared that represents a reasonable worst-case development scenario under the existing zoning. Kittelson&Associates,Inc. Portland,Oregon Zone Change Transportation Assessment Project#:26220 April 2021 Page:3 The majority of the site is zoned WLG-OC(1.13 acres)with two smaller portions zoned WLG-R-2.5 (0.15 acres) and WLG RMU (0.10 acres).A reasonable worst-case buildout scenario was then prepared based upon a review of the City's zoning code requirements and permitted uses shown in Table 50.03.002-2 of the City's Development Code. The following uses could have the highest potential trip making: • Both the WLG-R-2.5 and WLG-RMU, the highest use from a trip making is a daycare. However, given their small size and separate proximity and assuming a reasonable floor area ratio (FAR=0.25 or 0.3),the daycare would likely be less than 1,000 square feet,which is likely not a reasonable development scenario. As such, no specific development assumptions were made for the small separate parcels. • The WLG-OC designation has the following permitted uses that would be the highest trip generators - restaurants and day care centers. The potential trip generation associated with these two uses in shown in Table 2. Table 2- Existing Zoning Trip Generation Potential (ITE Trip Generation, 10th Edition) Weekday AM Peak Hour Weekday PM Peak Hour Weekday Trips Trips ITE Daily Land Use Code Size Trips Total In Out Total In Out Day Care Center 565 5,000 sq.ft.1 238 55 29 26 56 26 30 High Turnover Sit-Down Restaurant 932 6,000 sq.ft.1 674 60 33 27 59 37 22 Less Pass-By(43%) 140 26 13 13 26 13 13 Net New Trips 534 34 20 14 33 24 9 Representative of the average size facility included in the respective land use category. As shown, a 5,000 sq. ft. day care center has the highest net new trip making potential under the existing zoning. Proposed Trip Generation As previously stated, the entire site is proposed to be combined entirely into the WLG-OC zone designation and amended to provide for multifamily housing. Based on a draft fit/density plan commissioned by the City of Lake Oswego staff, the site can reasonably accommodate up to 54 multifamily low rise housing units. The associated trip generation for this level of multifamily low-rise housing is shown in Table 3. Table 3- Proposed Zoning Trip Generation (ITE Trip Generation, 10th Edition) Weekday Weekday AM Peak Hour Trips Weekday PM Peak Hour Trips ITE Daily Land Use Code Size Trips Total In Out Total In Out Multifamily Low-Rise Housing 220 54 units 396 25 6 19 30 19 11 Kittelson&Associates,Inc. Portland,Oregon Zone Change Transportation Assessment Project#:26220 April 2021 Page:4 Proposed Zoning Compared with Existing Zoning Comparing a reasonable maximum buildout of the existing and proposed zoning (with the proposed multifamily housing allowance), the proposed amendment would result in a decrease in trips associated with the site. For this reason, it can be concluded that the proposed land use modification would not have a significant effect on the transportation system as defined by the TPR. As such, no additional transportation analysis is needed to address the fundamental requirement of the Transportation Planning Rule. Please contact us if you have questions or need additional information. Sincerely, KITTELSON &ASSOCIATES, INC. 41/6-14,1014/— Matt Hughart, AICP Principal Planner Kittelson&Associates,Inc. Portland,Oregon