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Trip Gen Comparison Memo 12092025 Https://boltonmenk-my.sharepoint.com/personal/maury_hooper_bolton-menk_com/Documents/Chanhassen Bluffs/Trip Generation Comp/Draft Trip Gen Comparison Memo 12092025.docx 3300 Fernbrook Ln North Suite 300 Plymouth, MN 55447 Phone: (763) 544-7129 Bolton-Menk.com MEMORANDUM Date: 12/9/2025 To: Michael Healy, BKV From: Maury Hooper, PE – Transportation Project Manager Bill Diede, PE – Senior Project Engineer Subject: Chanhassen Bluffs Community Center- Trip Generation Comparison BKV Group 25X137963.000 Purpose of Memorandum The intent of this memorandum is to compare projected vehicle trip generation for the southeast quadrant under two scenarios: 1. Land uses assumed in the 2023 Avienda Traffic Impact Analysis (TIA) 2. The currently proposed Recreational Community Center land use. For consistency, this comparison uses total site trip generation without applying internal capture or pass-by trip reductions. Previous Report Information The Avienda Traffic Impact Analysis (TIA), completed on July 28, 2023, provided trip generation estimates under two development scenarios: • Table 5: Trip Generation for the 2022 Planned Unit Development (PUD) without the Southeast Quadrant. • Table 7: Trip Generation for the 2022 PUD including the Southeast Quadrant, with separate grocery use. (These table and figure references match the original Avienda report for consistency.) Name: Chanhassen Bluff Community Center – Trip Generation Comparison Date: 12/9/2025 Page: 2 Https://boltonmenk-my.sharepoint.com/personal/maury_hooper_bolton-menk_com/Documents/Chanhassen Bluffs/Trip Generation Comp/Draft Trip Gen Comparison Memo 12092025.docx A figure highlighting the southeast area in red, along with the two referenced tables from the Avienda study, is included below. Table 5 reflects total trip generation without the Southeast Quadrant, while Table 7 reflects total trip generation with the southeast quadrant included. For additional details and assumptions, please refer to the full Avienda report. Source: Avienda Traffic Impact Analysis, Toole Design (2023) Name: Chanhassen Bluff Community Center – Trip Generation Comparison Date: 12/9/2025 Page: 3 Https://boltonmenk-my.sharepoint.com/personal/maury_hooper_bolton-menk_com/Documents/Chanhassen Bluffs/Trip Generation Comp/Draft Trip Gen Comparison Memo 12092025.docx Source: Avienda Traffic Impact Analysis, Toole Design (2023) Source: Avienda Traffic Impact Analysis, Toole Design (2023) Name: Chanhassen Bluff Community Center – Trip Generation Comparison Date: 12/9/2025 Page: 4 Https://boltonmenk-my.sharepoint.com/personal/maury_hooper_bolton-menk_com/Documents/Chanhassen Bluffs/Trip Generation Comp/Draft Trip Gen Comparison Memo 12092025.docx The southeast quadrant under review for this comparison is approximately 15 acres, which closely matches the size of the current Community Center site plan. One adjustment was considered when comparing overall development trips: • The proposed Community Center layout includes parking west of the building, which reduces the space available for a previously assumed senior housing development adjacent to the site. • This change would result in fewer trips for this development than originally estimated. For example, if the remaining space was utilized for 8000 SF of Office versus the current assumption of 300 dwelling units of senior housing, daily trips would be reduced by 715, AM peak period trips would be reduced by 31, and PM peak period trips would be reduced by 36. However, to maintain a conservative and straightforward comparison, no trip generation reductions have been applied. FIGURE A Current Site Plan Position Trip Generation Comparison Process The comparison of trip generation for the Southeast Quadrant followed these steps: 1. Review Prior Study Data: Determine the estimated trip generation for the southeast quadrant based on the 2023 Avienda Traffic Impact Analysis (TIA). Name: Chanhassen Bluff Community Center – Trip Generation Comparison Date: 12/9/2025 Page: 5 Https://boltonmenk-my.sharepoint.com/personal/maury_hooper_bolton-menk_com/Documents/Chanhassen Bluffs/Trip Generation Comp/Draft Trip Gen Comparison Memo 12092025.docx 2. Develop Current Estimates: Using the 12th Edition of the Institute of Transportation Engineers (ITE) Trip Generation Manual, calculate trip generation for the proposed Recreational Community Center (Land Use Code 495). 3. Compare Estimates: Evaluate differences between the previous trip generation estimates and the current estimates for the southeast quadrant. 4. Summarize Overall Impact: Provide a “big picture” summary of total development trip generation under both previous and current conditions. STEP 1: Review Prior Study Data TABLE 1 Previous Study Trip Estimation for SE Quadrant 5,015 daily, 385 AM peak, and 535 PM peak, total site trips were previously estimated for the southeast quadrant. STEP 2: Develop Current Estimates Trip estimation for a 195,000 SF Recreational Community Center (ITE LUC 495) is shown in Table 2. TABLE 2 Current Study Trip Estimation for SE Quadrant 5,364 daily, 291 AM peak, and 473 PM peak, total site trips are estimated for the current site plan depicted in Figure B. DAILY IN OUT IN OUT 416 468 751 671 IN OUT IN OUT 711 558 950 1,007 IN OUT IN OUT 295 90 199 336 AM PM Total Site without SE Generated Trips - Table 5 16,814 884 1,422 Total Site with SE Generated Trips - Table 7 21,829 1,269 1,957 SE Area Trip Generation - Prior Study 5,015 385 535 DAILY IN OUT IN OUT 192 99 227 246 AM PM Recreational Community Center (ITE LUC 495)5,364 291 473 195,000 SF Name: Chanhassen Bluff Community Center – Trip Generation Comparison Date: 12/9/2025 Page: 6 Https://boltonmenk-my.sharepoint.com/personal/maury_hooper_bolton-menk_com/Documents/Chanhassen Bluffs/Trip Generation Comp/Draft Trip Gen Comparison Memo 12092025.docx FIGURE B Current Community Center Site Plan Name: Chanhassen Bluff Community Center – Trip Generation Comparison Date: 12/9/2025 Page: 7 Https://boltonmenk-my.sharepoint.com/personal/maury_hooper_bolton-menk_com/Documents/Chanhassen Bluffs/Trip Generation Comp/Draft Trip Gen Comparison Memo 12092025.docx STEP 3: Compare Estimates For the southeast quadrant, the current community center site plan is anticipated to generate a slight increase in total daily trips compared to previously assumed land uses: • Current Estimate: 5,364 daily trips • Previous Estimate: 5,015 daily trips • Difference: +349 trips daily Importantly, the community center is expected to generate fewer trips during peak traffic periods, when roadway operations are most critical: • AM Peak: 94 fewer trips. • PM Peak: 62 fewer trips. There are fewer trips projected overall during the AM and PM peak hours; however, the directional distribution indicates AM OUT and PM IN could exceed prior study projections by a modest amount, additional details are provided in Table 3. TABLE 3 SE Quadrant Comparison Previous Estimate vs. Current Estimate Differences STEP 4: Summarize Overall Site Using the result from STEP 3, the total site comparison from the previous trip estimation and the current trip estimation are shown in Table 4 below. TABLE 4 Total Site Development Trips Previous Estimate vs. Current Estimate IN OUT IN OUT -103 9 28 -90 Differecence in Estimated Trips between Previous Land Use and Current Community Center Land Use (+ equals increase, - equals decrease) 349 -94 -62 DAILY IN OUT IN OUT 711 558 950 1,007 IN OUT IN OUT 608 567 978 917 Currrent - Total Site with SE Community Center 22,178 1,175 1,895 AM PM Previous - Total Site with SE Generated Trips - Table 7 21,829 1,269 1,957 Name: Chanhassen Bluff Community Center – Trip Generation Comparison Date: 12/9/2025 Page: 8 Https://boltonmenk-my.sharepoint.com/personal/maury_hooper_bolton-menk_com/Documents/Chanhassen Bluffs/Trip Generation Comp/Draft Trip Gen Comparison Memo 12092025.docx Other Site Plan Considerations At the time of this review, internal circulation for the site had not been finalized. There are no access changes to Bluff Creek Boulevard proposed as part of this project. Summary Based on this trip generation review, the changes in SE quadrant trip estimation, resulting from the community center, are anticipated to be minor overall when compared to the previous study. Even though total daily trips are anticipated to increase slightly for the SE quadrant (1.5% increase), the AM and PM peak periods are expected to see trips decrease by approximately 7.5% and 3.2%. This comparison does not include changes in traffic from adjacent developments. For example, senior housing west of the community center could reduce trips, and future development east of the center could add trips. Although these factors were not included in the numbers shown in Step 4 of this comparison, an example of how trip reductions for the senior housing west of the community center could work was provided earlier in this memo.