January 12, 2018 Mr. Ryan Granger TMGB Wilson, LLC 2221 Health Drive SW, Suite 2200 Wyoming, Michigan 49519 Re: Proposed Reserve at Rivertown Mixed-Use Development Updated Trip Generation and Site Driveway Distribution Review City of Wyoming, Michigan 200-116436-15001 Dear Mr. Granger: Tetra Tech (Tt) has completed our review of the updated site plan for the proposed Reserve at Rivertown mixed-use development to be located in the southeast quadrant of Wilson Avenue and 56 th Street intersection in the City of Wyoming, Michigan. The current site plan now indicates 306 single-family homes, 288 apartments, 154 condominiums, and up to 25,000 sq. ft. of specialty retail space. The site plan continues to show access via two proposed driveways onto Wilson Avenue (the northern driveway to be located opposite Del Mar Drive), a proposed driveway onto 56 th Street east of Wilson Avenue, and internal connecting roadways for the single-family homes and condominiums to Nile Drive, but no longer provides cross access between the apartments and commercial areas with the rest of the site. This updated trip generation forecast and site driveway trip distribution review has been completed in accordance with the requirements specified by the City of Wyoming staff. Trip Generation Comparison, Previous and Update Site Plans Using the information and methodologies specified in the 9 th Edition of Trip Generation published by the Institute of Transportation Engineers (ITE), Tt forecast the total weekday, AM and PM peak hour trips associated with the proposed Reserve at Rivertown mixed-use development. While, the 10 th Edition of Trip Generation has been released, in order to keep the results comparable between the previous and updated site plans, the 9 th Edition was used. The results of the trip generation forecast for the previous site plan is provided in Table 1, the trip generation forecast for the updated site plan is provided in Table 2, and the results of the trip generation forecast comparison are provided in Table 3. Tetra Tech of Michigan, P.C. 7927 Nemco Way, Suite 100, Brighton, MI 48116 Tel 810.220.2112 Fax 810.225.8458 www.tetratech.com
Land Use Table 1 Previous Site Plan Trip Generation Forecast Land Use Code Size AM Peak Hour PM Peak Hour Week Day Single Family Houses 210 316 Units 58 173 231 186 110 296 3,027 Apartment 220 370 Units 37 149 186 144 78 222 2,366 Specialty Retail Center 826 25,000 sq. ft. 15 1 9 1 24 1 36 46 82 1,108 TOTAL TRIPS 110 331 441 366 234 600 6,501 1. Information on AM peak Hour of Adjacent Street Traffic, One Hour Between 7 and 9 a.m. for Specialty Retail Center is not available. Information for Land Use 820 Shopping Center, a similar use, was substituted. Land Use Table 2 Updated Site Plan Trip Generation Forecast Land Use Code Size AM Peak Hour PM Peak Hour Week Day Single Family Houses 210 306 Units 56 168 224 181 107 288 2,939 Apartment 220 288 Units 29 116 145 115 62 177 1,869 Condominiums 230 154 Units 12 61 73 58 28 86 937 Specialty Retail Center 826 25,000 sq. ft. 15 1 9 1 24 1 36 46 82 1,108 TOTAL TRIPS 112 354 466 390 243 633 6,853 1. Information on AM peak Hour of Adjacent Street Traffic, One Hour Between 7 and 9 a.m. for Specialty Retail Center is not available. Information for Land Use 820 Shopping Center, a similar use, was substituted. Table 3 Trip Generation Comparison, Previous and Updated Site Plans Site Plan Version AM Peak Hour PM Peak Hour Week Day Previous Site Plan 110 331 441 366 234 600 6,501 Updated Site Plan 112 354 466 390 243 633 6,853 TOTAL CHANGE IN TRIPS +2 +23 +25 +24 +9 +33 +352 From the results presented above, the updated site plan would result in an increase of 25 trips during the AM peak hour (2 inbound and 23 outbound), 33 additional trips during the PM peak hour (24 inbound and 9 outbound), and 352 additional trips throughout the day. These represent approximately a 5.5% increase over the previous forecast for the site. 2
Site Driveway Trip Distribution The updated site plan no longer shows internal roadway connections between the commercial and apartment areas with the condominium and single-family homes areas of the proposed development. The east and north site driveways would now only provide access to the commercial and apartment uses within the site, with access to the condominiums and single-family homes provided by the south site driveway and Nile Drive. One of the concerns expressed by City of Wyoming staff was if this modification to internal access would result in significant changes or increases in site trips at the north and east site driveways, which in turn could impact or be impacted by the operations of the intersection of Wilson Avenue and 56 th Street. Impacts to the south site driveway and Nile Drive were not as much of a concern, since these locations are located further away from adjacent intersections, and operational impacts were not as much of a concern. To determine the change in site trips at the north and east site driveways, the total trips (both entering and exiting) at both driveways from the previous study were combined, and compared with the total trips forecast for just the commercial and apartment areas of the updated site plan. Under the previous study, the total trips entering the north and east driveways were 55 during the AM peak hour and 182 during the PM peak hour, and the total trips exiting the north and east driveways were 177 during the AM peak hour and 126 during the PM peak hour. By comparison, the total trips forecast for the commercial and apartment areas of the proposed development were 44 trips entering during the AM peak hour and 151 trips entering during the PM peak hour, and 125 trips exiting during the AM peak hour and 108 trips exiting during the PM peak hour. The updated site plan would result in 11 fewer trips during the AM peak hour and 31 fewer trips during the PM peak hour entering the north and east site driveways, along with 52 fewer trips during the AM peak hour and 18 fewer trips during the PM peak hour exiting the north and east site driveways. The results are summarized in Table 4 below. Table 4 Total Anticipated Driveway Trips, North and East Site Driveways Site Plan Version AM Peak Hour PM Peak Hour Previous Site Plan, East and North Site Driveways 55 177 232 182 126 308 Updated Site Plan, East and North Site Driveways 44 125 169 151 108 259 TOTAL CHANGE IN TRIPS EAST AND NORTH SITE DRIVEWAYS -11-52 -63-31 -18-49 3
While site trips would be reduced at the north and east site driveways due to the proposed modifications to internal site access, site trips at the south site driveway and Nile Drive intersections would increase. Reviewing the operational results presented in the previous updated study completed in 2017 for the site indicated that both the south site driveway and Nile Drive approaches would operate at a Level Of Service (LOS) C or better under forecast 2037 conditions during both the AM and PM peak hours. The increase in site trips at these locations is not anticipated to change the LOS rating or significantly degrade the operation of these approaches under forecast 2037 conditions. Conclusions and Recommendations The proposed updated Reserve at Rivertown mixed-use development consists of 306 single-family homes, 288 apartments, 154 condominiums, and up to 25,000 sq. ft. of commercial space. The proposed development will have access to Wilson Avenue via two driveways (the northern of which is to be located opposite Del Mar Drive), and access to 56 th Street via a new driveway and connections to Nile Drive, the same as the original development proposed in 2014 and the updated development proposed in 2017. However, the latest site plan removes internal access between the commercial and apartment areas of the development with the condominium and single-family home areas. The proposed updated development is forecast to generate 466 trips during the AM peak hour (112 inbound and 354 outbound) and 633 trips during the PM peak hour (390 inbound and 243 outbound). Compared to the previously proposed development on the site, the updated Reserve at Rivertown mixed-use development would generate 25 more trips during the AM peak hour (2 more inbound and 23 more outbound) and 33 more trips during the PM peak hour (24 more inbound and 9 more outbound), and 352 additional daily trips. These increases, on average, would generate a single additional vehicle every two minutes either from or to the site during the AM and PM peak hours over the previous proposed development. While the updated development would generate more trips, due to the proposed changes in internal access, trips at the north and east site driveways would be reduced, resulting in similar, if not improved, operation at these site driveway intersections. Although this would result in additional trips at the south site driveway and Nile Drive intersections, the results of the previous operational reviews of these intersections indicate that there is sufficient capacity at these intersections to handle the anticipated shifts in site traffic under forecast 2037 conditions. While the updated site plan would result in an increase in site generated trips, the original recommended improvements remain unchanged from the original and previously updated traffic reports. These recommendations consist of: Installation of a traffic signal at the intersection of 56 th Street and Ivanrest Avenue (required under 2022 Background and subsequent conditions); 4
Optimization of the traffic signal timing during the PM peak hour at the intersection of Wilson Avenue and the Westbound M-6 Ramps (required under 2022 Background and subsequent conditions); and Optimization of the traffic signal timing during the PM peak hour at the intersection of Wilson Avenue and 56 th Street (required under 2037 Build conditions). We trust that this letter fulfills your current transportation needs regarding your site. If you have any questions, please feel free to call our office at (810)-220-2112. Sincerely, Kyle W. Ramakers, P.E., PTOE Transportation Engineer Attachments P:\IER\116436\200-116436-15001\SupportDocs\Calcs\Traffic\2018_January_Update\Reserves_TIS-2018_Update_Letter.docx 5
SITE PLAN
NILE DR. HICKORY RIDGE DR. MILLS RIDGE DR. THOROUGHBRED DR. 56TH ST. O N R T H SIDE YARD BUFFER/ AREA #12 1.96 ACRES SITE LOCATION LOCATION MAP YUKON DR. O N R T H DEL-MAR DR. 0 100 200 SIDE YARD BUFFER/ AREA #11 6.73 ACRES 71 72 73 82 83 84 93 94 95 RHINE CT. ELBE CT. SCALE: 1" = 100' CONSUMERS EASEMENT 70 69 68 67 KAVERI DR. 74 75 76 77 81 80 79 78 SEINE DR. 85 92 86 91 87 90 88 89 ORINOCO CT. 96 97 98 99 YUKON DR. HICKORY RIDGE CT. WILSON AVE. 66 65 64 132 131 DANUBE DR. 104 103 102 101 100 AMUR DR. DANUBE DR. 63 133 130 105 106 107 108 20 19 NILE DR. 62 61 134 135 129 128 URAL DR. 109 21 22 18 17 BUFFER/ AREA #7 1.15 ACRES BUFFER/ AREA #6 1.36 ACRES CLUB HOUSE AREA #8 0.64 ACRES 53 54 56 55 52 51 50 49 DOG PARK 48 PUBLIC PARK #10 0.91 ACRES 47 PUBLIC PLAYGROUND / PARK #9 2.18 ACRES 46 45 60 59 58 57 136 137 138 139 140 141 TRAFFIC CALMING ROAD RESTRICTION 127 126 125 124 SEINE DR. 44 43 42 41 40 39 123 120 119 121 118 122 34 33 32 31 PUBLIC #4 0.82 ACRES 38 117 116 115 30 37 143 URAL DR. URAL DR. 110 111 112 113 29 36 142 151 24 25 150 153 23 114 27 16 15 14 26 13 28 RESERVE DR. 35 152 AMUR DR. AMUR DR. 12 11 10 162 161 160 SAGE RIVER CT. TRAFFIC CIRCLE AT AMUR DR. INTERSECTION 9 8 7 NILE DR. PUBLIC PLAY GROUND / PARK #2 3.27 ACRES SHELLDRAKE DR. 6 163 164 165 5 INDUS CT. 175 174 4 173 CHESTNUT RIDGE DR. 172 3 2 1 #1 1.71 ACRES UTILITY EASEMENT WALNUT RIDGE DR. P:\170151.01 WILSON & 56TH - WYOMING\CAD\DWG\170151.1_ALTERNATE PUD OPTION-1 (2017).dwg_1/8/2018 11:15:42 AM_MATT KOZAK PUBLIC #5 0.73 ACRES SUMMARY # AREA # AREA 1 1.71 ACRES 8 0.64 ACRES 2 3.27 ACRES 9 2.18 ACRES 3 3.84 ACRES 10 0.91 ACRES 4 0.82 ACRES 11 6.73 ACRES 5 0.73 ACRES 12 1.96 ACRES 6 1.36 ACRES ENVIRONMENTAL 9.02 ACRES 7 1.15 ACRES TOTAL REGIONAL STORM WATER DETENTION BASIN 34.33 ACRES (26.3% ENVIRONMENTAL AREA STORM WATER DETENTION AREA CALCULATIONS USE UNITS AREA COVERAGE 34.33 ACRES 18.33% COMMERCIAL 3.76 ACRES 2.01% SINGLE FAMILY 306 UNITS 105.28 ACRES (22.9 ACRES=ROW) 56.22% CONDOS 154 18.64 ACRES TOWNHOUSES/MULTI FAMILY 288 23.26 ACRES S 10 TOTAL 748 UNITS 187.26 ACRES 3.99 UNITS/ACRE 144 145 WALKING PATH PUBLIC #3 3.84 ACRES 146 147 149 148 154 155 156 LEGEND 157 158 159 TENNIS COURTS PLAN REVISIONS 166 167 168 WALKING TRAIL ZONING PUD ORDINANCE 169 171 170 PUD PLAN FOR THE RESERVE CITY OF WYOMING, KENT COUNTY, MICHIGAN MOORE & BRUGGINK, INC. C o n s u l t i n g E n g i n e e r s 2020 Monroe Avenue N.W. Grand Rapids, Michigan 49505-6298 Phone: (616) 363-9801 Web: www.mbce.com PREPARED FOR: GRANGER GROUP 2221 HEALTH DR. SW SUITE 2200 WYOMING, MI 49519 PHONE: (616) 248-3566 FIELD SURVEY / DATE: DESIGNED BY: DESIGN DRAWN BY: CHECKED BY: PLAN DATE: PROJECT NO.: SHEET NUMBER 1 OF 1