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Creekview Add PD-CS 871112 NATHAN D. MAIER CONSULTING ENGINEERS, INC. Ms. Shohre Daneshmand City of Coppell P.O. Box 478 Coppell, Texas 75019 November 12, 1987 Re: Creek View Addition NDM No.: 87-6-62 Dear Ms. Daneshmand: Enclosed please find computer output and a summary table comparing the 100-year ultimate water surface elevations for the above project. The Flood- plain Reclamation Report for submittal to FEMA has been sent to you as a sepa- rate submittal. As we have discussed previously, there is a maximum increase in the 100-year ultimate water surface elevation of 0.42 feet, which occurs at section 5.0. None of the existing structures in the North Lake Woodlands sub- division are affected by this change in water surface elevation. Pleae review the enclosed information and provide to me your comments. If you should have any questions, please feel free to give me a call. Sincerely, NATHAN D. MAIER CONSULTING ENGINEERS, INC. Dennis L. Johnson, P.E. DLJ/rdp cc: Carl Anderson PAWA - Winkelman Three NorthPark/8800 N. Central Expwy./Suite 300/Dallas, Texas 75231/(214) 739-4741 COMPARISON OF 100-YEAR ULTIMATE WATER SURFACE Grapevine Creek STREAM CROSS SECTION 18514 18515 REVISED EXISTING CONDITIONS WITH F.I.S. DISCHARGES 464.18 464.18 WITH ULTIMATE DISCHARGES* 465.82 465.82 PROPOSED CONDITIONS WITH ULTIMATE DISCHARGES* 465.82 465.82 MOORE ROAD 18565 18566 18600 18615 18650 0.1 0.2 0.3 20540 0.5 0.6 21690 1.0 22600 2.0 23900 3.0 4.0 5.0 24930 6.0 25085 25135 25185 25235 25280 25325 25375 25421 25422 464. 464 466 466 466 467 468 470 471 472 472 474 477 477 48O 482 483 483 484 485 485 485 485 486 487 487 487 487 487 487 47 42 O6 O9 09 70 57 47 47 21 21 13 01 97 04 51 10 95 53 16 16 16 91 55 O3 35 57 63 82 82 466.16 466.16 468.45 468.47 468.47 469.23 470.15 471.77 472.85 473.74 473.74 475.49 478.54 479.71 481.61 484.37 484.93 485.81 486.42 487.04 487.04 487.04 487.17 487.80 488.31 488.71 489.01 489.10 489.35 489.35 466. 466. 468. 468. 468. 469. 470. 471. 472. 473. 473. 475. 478. 479 481 484 485 485 486 487 487 487 487 487 488 488 489 489 489 489 16 16 45 47 47 23 15 77 85 74 74 49 46 75 93 73 21 98 84 40 4O 4O 4O 84 56 97 26 34 58 57 lof2 11/12/87 11 -~' /il I COMPARISON O_._~F 100-YEAR IJLTII~TE WATER SURFAGE PROFI~ES,~. ¢ont'inued STREAM CROSS SECTION REVISED EXISTING CONDITIONS I WITH F.I.S. [ WITH ULTIMATE DISCHARGES I DISCHARGES* PROPOSED CONDITIONS WITH ULTIMATE DISCHARGES* DENTON TAP ROAD 25542 25543 25568 25618 25668 25714 25754 25820 26170 26550 26880 27050 27400 27540 27570 27620 30130 30189 30190 30200 30201 30250 31310 487 84 487 88 487 88 487 88 487 89 487 89 488 01 488 24 488 59 489 99 491 10 491 78 494 71 494 71 494 93 495 62 502 17 502 17 502 17 502 39 502 98 504 02 5O6 15 489.38 489.43 489.43 489.43 489.46 489.50 489.64 490.12 490.31 491 35 492 41 493 86 495 73 495 81 495 89 496 5O2 5O2 5O2 5O2 5O3 5O4 5O6 00 41 41 41 66 34 52 60 489 61 489 66 489 66 489 66 489 69 489 73 489 87 490 32 490 49 491 46 492 48 493 90 485 75 495 83 495 91 496 02 5O2 4O 502 40 502 40 502 66 503 33 504 52 506 60 *Starting water surface obtained from Anderson Engi- neers for City of Coppell Drainage Master Plan. 2of2 11/12/87 NATHAN D. MAIER CONSULTING ENGINEERS, INC. Ms. Shohre Daneshmand City of Coppell P.O. Box 478 Coppell, Texas 75019 November 12, 1987 Re: Creek View Addition NDM No.: 87-6-62 Dear Ms. Daneshmand: Enclosed please find computer output and a summary table comparing the 100-year ultimate water surface elevations for the above project. The Flood- plain Reclamation Report for submittal to FEMA has been sent to you as a sepa- rate submittal. As we have discussed previously, there is a maximum increase in the 100-year ultimate water surface elevation of 0.42 feet, which occurs at section 5.0. None of the existing structures in the North Lake Woodlands sub- division are affected by this change in water surface elevation. Pleae review the enclosed information and provide to me your comments. If you should have any questions, please feel free to give me a call. Sincerely, NATHAN D. MAIER CONSULTING ENGINEERS, INC. ; i!' ~: ........ Dennis L. JohnSon, P.E. DLJ/rdp cc: Carl Anderson PAWA - Winkelman Three NorthPark/8800 N. Central Expwy./Suite 300/Dallas, Texas 75231/(214) 739-4741 COMPARISON OF 100-YEAR ULTIMATE WATER Grapevine Creek SURFACE PROFILES STREAM CROSS SECTION 18514 18515 REVISED EXISTING CONDITIONS WITH F.I.S. DISCHARGES 464.18 464.18 WITH ULTIMATE DISCHARGES* 465.82 465.82 PROPOSED CONDITIONS WITH ULTIMATE DISCHARGES* 465.82 465.82 MOORE ROAD 18565 18566 18600 18615 18650 0.1 0.2 0.3 20540 0.5 0.6 21690 1.0 22600 2.0 23900 3.0 4.0 5.0 24930 6.0 25085 25135 25185 25235 25280 25325 25375 25421 25422 464 47 464 42 466 06 466 09 466 09 467 70 468 57 470 47 471 47 472 21 472 21 474 13 477 01 477 97 48004 48251 483.10 483.95 484.53 485.16 485.16 485.16 485.91 486.55 487.03 487.35 487.57 487.63 487.82 487.82 466.16 466.16 468.45 468.47 468.47 46923 470 15 471 77 472 85 473 74 473 74 475 49 478 54 479 71 481 61 484 37 484 93 485 81 486 42 487 04 487 04 48704 48717 487~80 488 31 488.71 489.01 489.10 489.35 489.35 466,16 466.16 468.45 468.47 468.47 469.23 470.15 471 77 472 85 473 74 473 74 475 49 478 46 479 75 481 93 484 73 485 21 485 98 486 84 487 40 487 40 487 40 487 40 48784 48856 48897 489,26 489,34 489.58 489.57 lof2 11/12/87 COMPARISON OF 100-YEAR ULTIMATE WATER SURFACE continued PROFILES, STREAM CROSS SECTION REVISED EXISTING CONDITIONS WITH F.I.S. I WITH ULTIMATE DISCHARGES I DISCHARGES* DENTON TAP ROAD PROPOSED CONDITIONS WITH ULTIMATE DISCHARGES* 25542 25543 25568 25618 25668 25714 25754 25820 26170 26550 26880 27050 27400 27540 27570 27620 30130 30189 30190 30200 30201 30250 31310 487 84 487 88 48788 487,88 48789 48789 488,01 488,24 488,59 489.99 491.10 491.78 494.71 494.71 494.93 495.62 502.17 502.17 502.17 502.39 502.98 504.02 506.15 489 38 489 43 489 43 489 43 489 46 489 50 489 64 490 12 490 31 491 35 492 41 493 86 495.73 49581 49589 49600 502~41 502 41 502,41 502,66 503,34 504.52 506.60 489 61 489 66 489 66 489 66 489 69 489 73 489 87 490 32 490 49 491 46 49248 49390 485.75 495.83 495.91 496.02 502.40 502.40 502.40 502.66 503.33 504.52 506.60 *Starting water surface obtained from Anderson Engi- neers for City of Coppell Drainage Master Plan. 2of2 11112187