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 0.269 0.473 0.911 0.251 0.447 0.880 -0.019 -0.025 -0.032 510 0.275 0.483 0.930 0.256 0.457 0.898 -0.019 -0.026 -0.032 516 0.280 0.493 0.948 0.261 0.467 0.916 -0.019 -0.026 -0.032 522 0.286 0.504 0.967 0.266 0.478 0.935 -0.020 -0.026 -0.032 528 0.292 0.514 0.986 0.272 0.488 0.954 -0.020 -0.026 -0.032 534 0.298 0.524 1.004 0.278 0.498 0.973 -0.020 -0.026 -0.032 540 0.305 0.535 1.023 0.284 0.508 0.991 -0.020 -0.026 -0.032 546 0.313 0.549 1.049 0.293 0.523 1.018 -0.021 -0.027 -0.032 552 0.327 0.572 1.091 0.306 0.545 1.059 -0.021 -0.027 -0.032 558 0.344 0.601 1.144 0.322 0.573 1.111 -0.022 -0.028 -0.033 564 0.362 0.632 1.203 0.340 0.603 1.169 -0.023 -0.029 -0.034 570 0.381 0.664 1.261 0.357 0.634 1.226 -0.024 -0.030 -0.035 576 0.400 0.696 1.321 0.376 0.665 1.285 -0.025 -0.031 -0.036 582 0.419 0.729 1.380 0.394 0.697 1.343 -0.025 -0.032 -0.037 588 0.439 0.761 1.440 0.413 0.729 1.403 -0.026 -0.033 -0.037 594 0.459 0.795 1.501 0.432 0.761 1.463 -0.027 -0.033 -0.038 600 0.479 0.828 1.562 0.451 0.794 1.523 -0.028 -0.034 -0.039 606 0.499 0.862 1.623 0.471 0.827 1.584 -0.028 -0.035 -0.039 612 0.520 0.896 1.684 0.490 0.860 1.645 -0.029 -0.035 -0.040 618 0.540 0.930 1.746 0.511 0.894 1.706 -0.030 -0.036 -0.040 624 0.561 0.965 1.809 0.531 0.928 1.769 -0.030 -0.037

0.040 618 0.540 0.930 1.746 0.511 0.894 1.706 -0.030 -0.036 -0.040 624 0.561 0.965 1.809 0.531 0.928 1.769 -0.030 -0.037 -0.040 630 0.582 1.000 1.872 0.552 0.963 1.831 -0.031 -0.037 -0.041 636 0.613 1.051 1.965 0.581 1.013 1.924 -0.032 -0.038 -0.042 642 0.664 1.136 2.120 0.630 1.096 2.077 -0.034 -0.040 -0.043 648 0.728 1.243 2.317 0.691 1.200 2.271 -0.036 -0.043 -0.046 654 0.799 1.363 2.536 0.760 1.317 2.487 -0.039 -0.046 -0.049 660 0.871 1.484 2.756 0.830 1.435 2.705 -0.042 -0.049 -0.051 666 0.955 1.624 3.010 0.911 1.572 2.956 -0.044 -0.052 -0.054 672 1.061 1.801 3.332 1.013 1.746 3.275 -0.048 -0.055 -0.057 678 1.183 2.004 3.699 1.131 1.945 3.638 -0.052 -0.059 -0.061 684 1.314 2.222 4.092 1.258 2.158 4.028 -0.056 -0.063 -0.064 690 1.447 2.442 4.488 1.388 2.375 4.421 -0.060 -0.067 -0.067 696 1.673 2.816 5.161 1.606 2.742 5.088 -0.066 -0.074 -0.073 702 1.990 3.342 6.110 1.915 3.260 6.029 -0.076 -0.083 -0.081 708 2.406 4.028 7.340 2.319 3.934 7.250 -0.087 -0.094 -0.090 714 3.156 5.268 9.562 3.049 5.154 9.455 -0.107 -0.114 -0.108 720 4.658 7.737 13.972 4.513 7.586 13.834 -0.144 -0.150 -0.138 726 7.702 12.713 22.808 7.493 12.501 22.619 -0.209 -0.212 -0.189 732 9.339 15.348 27.410 9.109 15.119 27.211 -0.230 -0.228 -0.199 738 7.484 12.260 21.824 7.314 12.093 21.681 -0.171 -0.167 -0.143 744 5.126 8.367 14.842 5.019 8.264 14.756 -0.107 -0.103 -0.086 750 3.158 5.135 9.076 3.098 5.079 9.030 -0.060 -0.056 -0.046 756 2.546 4.134 7.296 2.500 4.091 7.261

-0.107 -0.103 -0.086 750 3.158 5.135 9.076 3.098 5.079 9.030 -0.060 -0.056 -0.046 756 2.546 4.134 7.296 2.500 4.091 7.261 -0.046 -0.043 -0.035 3 of 24