2025 12 19 Stormwater Report Rev 1

0.051 0.131 0.340 0.048 0.122 0.317 -0.004 -0.009 -0.024 120 0.057 0.139 0.352 0.053 0.130 0.328 -0.004 -0.010 -0.024 126 0.062 0.147 0.363 0.057 0.137 0.338 -0.004 -0.010 -0.025 132 0.067 0.154 0.374 0.062 0.143 0.348 -0.005 -0.011 -0.026 138 0.071 0.161 0.384 0.066 0.150 0.357 -0.005 -0.011 -0.027 144 0.076 0.168 0.393 0.070 0.156 0.366 -0.005 -0.012 -0.027 150 0.080 0.174 0.402 0.075 0.162 0.374 -0.006 -0.012 -0.028 156 0.084 0.180 0.410 0.078 0.167 0.381 -0.006 -0.012 -0.028 162 0.088 0.186 0.418 0.082 0.173 0.389 -0.006 -0.013 -0.029 168 0.093 0.192 0.427 0.086 0.178 0.397 -0.006 -0.013 -0.030 174 0.096 0.197 0.434 0.090 0.183 0.404 -0.007 -0.014 -0.030 180 0.100 0.202 0.441 0.093 0.188 0.411 -0.007 -0.014 -0.031 186 0.104 0.207 0.448 0.097 0.193 0.417 -0.007 -0.014 -0.031 192 0.108 0.212 0.455 0.100 0.198 0.424 -0.007 -0.015 -0.032 198 0.111 0.217 0.462 0.103 0.202 0.430 -0.008 -0.015 -0.032 204 0.115 0.222 0.469 0.107 0.206 0.436 -0.008 -0.015 -0.032 210 0.118 0.227 0.476 0.110 0.211 0.443 -0.008 -0.016 -0.033 216 0.122 0.231 0.483 0.113 0.215 0.450 -0.008 -0.016 -0.033 222 0.125 0.235 0.492 0.116 0.219 0.458 -0.009 -0.016 -0.033 228 0.128 0.240 0.500 0.119 0.223 0.467 -0.009 -0.017 -0.033 234 0.131 0.244 0.508 0.122 0.227 0.475 -0.009 -0.017 -0.033 240 0.134 0.248 0.518 0.125 0.231 0.485 -0.009 -0.017 -0.033 13 of 24

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

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

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) 762 2.528 4.091 7.612 2.491 4.059 7.588 -0.036 -0.032 -0.024 768 2.204 3.565 6.628 2.174 3.538 6.608 -0.031 -0.027 -0.020 774 1.958 3.165 5.880 1.932 3.141 5.862 -0.027 -0.024 -0.018 780 1.792 2.894 5.374 1.768 2.873 5.358 -0.024 -0.021 -0.016 786 1.624 2.622 4.866 1.603 2.603 4.852 -0.021 -0.019 -0.014 792 1.470 2.372 4.401 1.451 2.356 4.389 -0.019 -0.017 -0.012 798 1.346 2.170 4.025 1.329 2.155 4.014 -0.017 -0.015 -0.011 804 1.240 1.999 3.706 1.225 1.986 3.696 -0.016 -0.014 -0.010 810 1.144 1.844 3.417 1.130 1.831 3.408 -0.014 -0.012 -0.009 816 1.048 1.688 3.127 1.035 1.677 3.119 -0.013 -0.011 -0.008 822 0.965 1.554 2.879 0.953 1.544 2.871 -0.012 -0.010 -0.007 828 0.911 1.466 2.716 0.900 1.457 2.709 -0.011 -0.009 -0.007 834 0.875 1.409 2.609 0.865 1.400 2.602 -0.010 -0.009 -0.007 840 0.849 1.366 2.529 0.839 1.358 2.523 -0.010 -0.009 -0.006 846 0.823 1.324 2.450 0.813 1.316 2.444 -0.010 -0.008 -0.006 852 0.797 1.282 2.371 0.787 1.274 2.365 -0.009 -0.008 -0.006 858 0.771 1.239 2.293 0.762 1.232 2.287 -0.009 -0.008 -0.006 864 0.744 1.197 2.214 0.736 1.190 2.208 -0.009 -0.007 -0.005 870 0.718 1.154 2.134 0.710 1.147 2.129 -0.008 -0.007 -0.005 876 0.692 1.111 2.055 0.684 1.105 2.050 -0.008 -0.007 -0.005 882 0.665 1.069 1.976 0.658 1.062 1.971 -0.007 -0.006

0.005 876 0.692 1.111 2.055 0.684 1.105 2.050 -0.008 -0.007 -0.005 882 0.665 1.069 1.976 0.658 1.062 1.971 -0.007 -0.006 -0.005 888 0.639 1.026 1.897 0.632 1.020 1.893 -0.007 -0.006 -0.004 894 0.612 0.984 1.818 0.605 0.978 1.814 -0.007 -0.006 -0.004 900 0.586 0.941 1.738 0.579 0.935 1.734 -0.006 -0.006 -0.004 906 0.559 0.898 1.659 0.553 0.893 1.655 -0.006 -0.005 -0.004 912 0.536 0.861 1.591 0.530 0.856 1.587 -0.006 -0.005 -0.004 918 0.521 0.836 1.545 0.515 0.832 1.542 -0.006 -0.005 -0.003 924 0.511 0.821 1.516 0.506 0.816 1.512 -0.006 -0.005 -0.003 930 0.504 0.809 1.494 0.499 0.804 1.491 -0.005 -0.005 -0.003 936 0.496 0.797 1.471 0.491 0.792 1.468 -0.005 -0.005 -0.003 942 0.489 0.785 1.449 0.484 0.780 1.446 -0.005 -0.004 -0.003 948 0.482 0.773 1.427 0.476 0.768 1.424 -0.005 -0.004 -0.003 954 0.474 0.760 1.403 0.469 0.756 1.400 -0.005 -0.004 -0.003 960 0.466 0.748 1.381 0.461 0.744 1.378 -0.005 -0.004 -0.003 966 0.459 0.737 1.360 0.454 0.733 1.357 -0.005 -0.004 -0.003 972 0.452 0.725 1.338 0.447 0.721 1.335 -0.005 -0.004 -0.003 978 0.444 0.712 1.315 0.440 0.709 1.312 -0.005 -0.004 -0.003 984 0.437 0.701 1.293 0.432 0.697 1.290 -0.005 -0.004 -0.003 990 0.429 0.688 1.270 0.425 0.685 1.267 -0.004 -0.004 -0.003 996 0.422 0.676 1.247 0.417 0.672 1.245 -0.004 -0.004 -0.003 1002 0.414 0.664 1.225 0.410 0.661 1.223 -0.004 -0.004 -0.003 1008 0.407 0.652 1.204 0.403 0.649 1.201 -0.004 -0.004 -0.002 1014 0.400 0.640 1.181 0.395 0.637 1.179

-0.004 -0.004 -0.003 1008 0.407 0.652 1.204 0.403 0.649 1.201 -0.004 -0.004 -0.002 1014 0.400 0.640 1.181 0.395 0.637 1.179 -0.004 -0.003 -0.002 16 of 24