2025 12 19 Stormwater Report Rev 1

Existing Conditions Proposed Conditions Difference Time 2-Year 10-Year 100-Year 2-Year 10-Year 100-Year 2-Year 10-Year 100-Year (Min) (CFS) (CFS) (CFS) (CFS) (CFS) (CFS) (CFS) (CFS) (CFS) 246 0.137 0.252 0.526 0.128 0.234 0.493 -0.009 -0.017 -0.033 252 0.140 0.256 0.535 0.130 0.238 0.502 -0.010 -0.018 -0.033 258 0.143 0.259 0.543 0.133 0.241 0.510 -0.010 -0.018 -0.033 264 0.146 0.263 0.552 0.136 0.245 0.519 -0.010 -0.018 -0.032 270 0.149 0.267 0.560 0.138 0.249 0.528 -0.010 -0.019 -0.032 276 0.151 0.271 0.568 0.141 0.252 0.536 -0.010 -0.019 -0.032 282 0.154 0.274 0.576 0.143 0.255 0.544 -0.011 -0.019 -0.032 288 0.156 0.277 0.584 0.146 0.258 0.552 -0.011 -0.019 -0.032 294 0.159 0.281 0.593 0.148 0.262 0.561 -0.011 -0.019 -0.032 300 0.162 0.285 0.601 0.151 0.265 0.569 -0.011 -0.020 -0.032 306 0.164 0.288 0.609 0.153 0.268 0.577 -0.011 -0.020 -0.031 312 0.167 0.291 0.616 0.155 0.271 0.585 -0.012 -0.020 -0.031 318 0.169 0.295 0.624 0.158 0.274 0.593 -0.012 -0.020 -0.031 324 0.172 0.298 0.633 0.160 0.277 0.602 -0.012 -0.021 -0.031 330 0.174 0.301 0.640 0.162 0.280 0.610 -0.012 -0.021 -0.031 336 0.176 0.304 0.648 0.164 0.283 0.617 -0.012 -0.021 -0.031 342 0.179 0.307 0.655 0.166 0.286 0.625 -0.012 -0.021 -0.030 348 0.181 0.311 0.663 0.169 0.290 0.633 -0.013 -0.021 -0.030 354 0.183 0.315 0.671 0.171 0.293 0.641 -0.013 -0.021 -0.030 360 0.186 0.319 0.679 0.173 0.298 0.649 -0.013 -0.021 -0.030 366 0.189 0.325 0.689 0.176 0.303 0.659 -0.013 -0.022

0.030 360 0.186 0.319 0.679 0.173 0.298 0.649 -0.013 -0.021 -0.030 366 0.189 0.325 0.689 0.176 0.303 0.659 -0.013 -0.022 -0.030 372 0.193 0.333 0.705 0.180 0.311 0.675 -0.013 -0.022 -0.030 378 0.199 0.343 0.724 0.185 0.321 0.694 -0.014 -0.022 -0.030 384 0.205 0.353 0.746 0.190 0.331 0.715 -0.014 -0.023 -0.031 390 0.210 0.364 0.766 0.196 0.341 0.735 -0.015 -0.023 -0.031 396 0.216 0.374 0.787 0.201 0.351 0.756 -0.015 -0.023 -0.031 402 0.222 0.385 0.808 0.207 0.362 0.777 -0.015 -0.024 -0.031 408 0.228 0.396 0.830 0.212 0.372 0.798 -0.016 -0.024 -0.032 414 0.234 0.408 0.852 0.218 0.383 0.820 -0.016 -0.024 -0.032 420 0.240 0.419 0.874 0.223 0.394 0.842 -0.017 -0.025 -0.032 426 0.246 0.430 0.896 0.229 0.405 0.864 -0.017 -0.025 -0.032 432 0.252 0.442 0.919 0.235 0.417 0.886 -0.017 -0.025 -0.032 438 0.259 0.453 0.941 0.241 0.428 0.908 -0.018 -0.025 -0.033 444 0.265 0.465 0.964 0.246 0.439 0.931 -0.018 -0.026 -0.033 450 0.271 0.477 0.986 0.252 0.451 0.953 -0.019 -0.026 -0.033 456 0.277 0.488 1.008 0.258 0.462 0.975 -0.019 -0.026 -0.033 462 0.283 0.500 1.030 0.263 0.473 0.997 -0.020 -0.026 -0.033 468 0.289 0.512 1.054 0.269 0.485 1.021 -0.020 -0.027 -0.033 474 0.296 0.524 1.077 0.275 0.497 1.044 -0.020 -0.027 -0.033 480 0.303 0.536 1.099 0.282 0.509 1.066 -0.021 -0.027 -0.033 486 0.310 0.548 1.123 0.289 0.521 1.090 -0.021 -0.027 -0.033 492 0.317 0.560 1.146 0.296 0.533 1.113 -0.021 -0.027 -0.033 498 0.325 0.572 1.169 0.303 0.544 1.136

-0.021 -0.027 -0.033 492 0.317 0.560 1.146 0.296 0.533 1.113 -0.021 -0.027 -0.033 498 0.325 0.572 1.169 0.303 0.544 1.136 -0.021 -0.027 -0.033 14 of 24