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) 504 0.332 0.584 1.192 0.310 0.556 1.159 -0.022 -0.028 -0.033 510 0.340 0.597 1.216 0.318 0.569 1.183 -0.022 -0.028 -0.033 516 0.347 0.609 1.239 0.325 0.581 1.206 -0.022 -0.028 -0.033 522 0.355 0.621 1.263 0.333 0.593 1.230 -0.022 -0.028 -0.033 528 0.363 0.634 1.287 0.340 0.606 1.254 -0.022 -0.028 -0.033 534 0.370 0.647 1.310 0.348 0.618 1.277 -0.022 -0.028 -0.033 540 0.378 0.659 1.333 0.355 0.631 1.301 -0.023 -0.028 -0.033 546 0.388 0.677 1.367 0.365 0.648 1.335 -0.023 -0.029 -0.033 552 0.405 0.704 1.422 0.381 0.675 1.388 -0.024 -0.029 -0.033 558 0.425 0.739 1.490 0.401 0.709 1.456 -0.024 -0.030 -0.034 564 0.448 0.778 1.565 0.423 0.747 1.530 -0.025 -0.031 -0.035 570 0.471 0.816 1.641 0.445 0.784 1.605 -0.026 -0.032 -0.036 576 0.494 0.856 1.717 0.467 0.823 1.680 -0.027 -0.033 -0.037 582 0.518 0.895 1.793 0.490 0.861 1.755 -0.028 -0.034 -0.037 588 0.541 0.935 1.870 0.513 0.900 1.832 -0.029 -0.035 -0.038 594 0.566 0.975 1.948 0.536 0.940 1.909 -0.030 -0.035 -0.038 600 0.590 1.016 2.025 0.560 0.979 1.986 -0.030 -0.036 -0.039 606 0.615 1.057 2.104 0.584 1.020 2.064 -0.031 -0.037 -0.039 612 0.639 1.097 2.182 0.608 1.060 2.142 -0.032 -0.037 -0.040 618 0.664 1.139 2.261 0.632 1.101 2.221 -0.032 -0.038 -0.040 624 0.690 1.181 2.341 0.657 1.143 2.301 -0.033 -0.038

0.040 618 0.664 1.139 2.261 0.632 1.101 2.221 -0.032 -0.038 -0.040 624 0.690 1.181 2.341 0.657 1.143 2.301 -0.033 -0.038 -0.040 630 0.715 1.223 2.420 0.682 1.184 2.380 -0.033 -0.039 -0.040 636 0.753 1.286 2.540 0.718 1.246 2.499 -0.035 -0.040 -0.041 642 0.814 1.388 2.738 0.778 1.347 2.695 -0.037 -0.042 -0.043 648 0.892 1.519 2.991 0.853 1.474 2.945 -0.039 -0.045 -0.045 654 0.979 1.664 3.271 0.937 1.617 3.223 -0.042 -0.048 -0.048 660 1.067 1.811 3.552 1.022 1.761 3.502 -0.045 -0.050 -0.050 666 1.169 1.981 3.877 1.121 1.927 3.824 -0.048 -0.053 -0.052 672 1.297 2.195 4.288 1.246 2.138 4.232 -0.051 -0.057 -0.055 678 1.445 2.441 4.757 1.390 2.380 4.698 -0.055 -0.061 -0.059 684 1.604 2.704 5.257 1.545 2.639 5.196 -0.059 -0.065 -0.062 690 1.766 2.970 5.761 1.703 2.902 5.697 -0.063 -0.068 -0.064 696 2.039 3.422 6.618 1.969 3.347 6.549 -0.070 -0.074 -0.069 702 2.424 4.058 7.826 2.344 3.974 7.750 -0.079 -0.084 -0.077 708 2.926 4.885 9.392 2.835 4.791 9.307 -0.091 -0.094 -0.085 714 3.834 6.380 12.218 3.723 6.267 12.118 -0.111 -0.114 -0.101 720 5.648 9.355 17.821 5.499 9.206 17.693 -0.148 -0.149 -0.128 726 9.317 15.338 29.026 9.104 15.130 28.853 -0.213 -0.208 -0.173 732 11.278 18.487 34.829 11.045 18.265 34.649 -0.232 -0.222 -0.180 738 9.027 14.751 27.701 8.855 14.590 27.573 -0.171 -0.161 -0.129 744 6.174 10.054 18.817 6.067 9.956 18.741 -0.107 -0.098 -0.077 750 3.798 6.163 11.494 3.739 6.110 11.453 -0.059 -0.053 -0.041 756 3.060 4.959 9.236 3.015 4.918 9.205

-0.107 -0.098 -0.077 750 3.798 6.163 11.494 3.739 6.110 11.453 -0.059 -0.053 -0.041 756 3.060 4.959 9.236 3.015 4.918 9.205 -0.045 -0.041 -0.031 15 of 24