FLOOD04702

• Designation Number: 347
• County: Jefferson
• Community: Unincorporated Jefferson County
• Stream Name: Upper Lena Gulch
• Basin: South Platte
• Title: Flood Hazard Area Delineation - Upper Lena Gulch
• Date: 1/1/1993
• Designation Date: 9/1/1993
• Floodplain - Doc Type: Floodplain Report/Masterplan

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Table 6-4

Floodway Table

Lena Gulch

LOCATION FLOllOPLAIN DATA I-FOOT RISE FLOllOWAY DATA 0.5.FOOT RISE FLOllOWAY DATA
tOO-YR DATA 10-YR DATA 50-YR DATA 500-YR DATA DISTANCES LOOKING DOWNSTREAM OISTANCES LOOKING DOWNSTREAM
DIS- THALWEG FLOllO MEAN F.P. DIS- FLOllO DIS- FLOllO DIS- FLOllO FLOllOWAY WIDTH FLOllOWAY MEAN FLOllOWAY WIDTH FLOllOWAY MEAN
SHT RCH SECT. CHARGE ELEV. ELEV. VEL. WIDTH CHARGE ELEV_ CHARGE ELEV. CHARGE ELEV. LEFT RIGHT TOTAL ELEV. VEL. LEFT RIGHT TOTAL ELEV. VEL.
# # # (CFS) (FT) (FT) (FPS) (FT) (CFS) (FT) (CFS) (FT) (CFS) (FT) (FT) (FT) (FT) (FT) (FPS) (FT) (FT) (FT) (FT) (FPS)
4 L-ll 397.25 2050 5988.9 5999.4 4.4 180 700 5997.3 1590 5998.6 4275 6001.1 30 30 60 6000.2 5.5 45 50 95 5999.4 5.0
4 L-ll 398.50 2050 5994.6 6000.8 8.9 180 700 5998.3 1590 6000.1 4275 6002.4 70 30 100 6000.8 9.2 70 30 100 6000.8 9.1
4 L-tl 399.25 2050 5996.0 6003.3 8.1 370 700 6001.0 1590 6002.4 4275 6004.2 110 30 140 6003.3 11.2 140 50 190 6003.3 10.5
3 L-ll 400_50 2050 5999.5 6006.7 8.1 430 700 6003.3 1590 6005.4 4275 6008.8 150 10 t60 6006.7 6.5 190 25 215 6006.7 5.9
3 L-l1 400.80 2050 5999.9 6007.1 6.8 420 250 6005.6 1100 6007.4 3750 6011.4 180 10 t90 6007.5 8.2 190 20 210 6007.3 8.0
3 L-ll 404.05 2050 6010.4 6020.1 6.8 170 250 6018.6 tl00 6019.7 3750 6021.2 160 10 170 6020.1 6.8 160 10 170 6020.1 6.8
3 L-ll 406.90 2050 6020.7 6032.1 6.8 170 250 6030.6 1100 6031. 7 3750 6033.2 150 20 170 6032.1 6.8 150 20 170 6032.1 6.8
3 L-ll 408.16 2050 6031.3 6040.6 12.6 35 600 6036.7 1450 6039.3 4100 6042.4 * 6040.6 12.6 * 6040.6 12.6
3 L-ll 408.40 2050 6032.5 6041.8 12.6 35 600 6037.8 1450 6040.5 4100 6043.6 * 6041.8 12.6 * 6041.8 12.6
3 L-l1 411.72 2050 6042.4 6053.8 13.1 30 600 6049.6 1450 6052.3 4tOO 6057.2 * 6053.8 13.3 * 6053.8 13.3
3 L-ll 4t2.85 1850 6047.3 6058.1 13.6 30 550 6053.8 1400 6056.8 4050 6062.4 * 6058.1 13.6 * 6058.1 t3.6
3 L-l1 4t4.50 1850 6054.5 6060.8 12.0 210 550 6057.6 1400 6059.9 4050 6064.7 20 10 30 6060.8 12.1 155 10 165 6060.8 12.1
3 L-12 416.22 1850 6061.2 6069.9 .7 350 550 6064.4 1400 6069.5 4050 6071.4 20 15 35 6069.9 11.4 50 15 65 6069.9 5.9
3 L-t2 417.80 1850 6068.0 6073.3 8.6 210 500 6070.7 1350 6072.6 3900 6074.3 45 10 35 6073.3 to.O 60 10 70 6073.3 8.9
3 L-12 420.95 1850 6079.9 6085.4 9.8 90 500 6083.4 1350 6084.9 3900 6087.6 65 0 65 6085.4 9.8 65 0 65 6085.4 9.8
3 L-12 424.72 1850 6096.9 6101.2 9.6 170 500 6099.1 1350 6100.6 3900 6103.t 40 30 70 6101.2 9.6 40 30 70 6t01.2 9.6
2 L-13 426.82 1850 6106.8 6t13.8 10.9 300 375 6110.6 900 6112.1 3200 6t15.5 35 15 50 6113.8 to.9 50 15 65 6t13.8 10.9
2 L-13 427.83 1150 6t12.1 6122.2 3.5 150 375 6120.8 900 6121. 9 3200 6124.2 70 60 130 6122.2 2.9 75 60 135 6122.2 2.9
2 L-13 430.57 1150 6t24.2 6130.6 10.0 40 375 6128.5 900 6130.0 3200 6131.9 * 6130.6 9.5 * 6130.6 9.5
2 L-13 432_98 900 6t34.0 6137.7 10.1 20 300 6135.6 750 6137.3 2500 6139.3 * 6137.7 to.6 * 6137.7 10.6
2 L-13 435.50 900 6t39.8 6148.0 3.3 130 300 6144.2 750 6147.5 2500 6151.2 20 30 50 6148.1 3.5 20 30 50 6148.1 3.5
2 L-13 437.35 900 6141.4 6t49.6 9.7 30 300 6147.8 750 6149.2 2500 6152.7 * 6149.6 9.7 * 6t49.6 9.7
2 L-13 442.74 900 6161.6 6166.3 9.7 30 300 6164.7 750 6166.0 2500 6169.4 * 6166.3 9.7 * 6t66.3 9.7
2 L-13 448.85 600 6182.0 6186.7 8.0 30 250 6185.6 420 6186.3 1150 6187.8 * 6186.7 8.0 * 6186.7 8.0
1 L-13 455.43 600 6205.8 6209.7 9.3 20 250 6208.3 420 6209.t 1150 6211. 2 * 6209.7 9.7 * 6209.7 9.7
1 L-t3 457.44 600 6218.0 6232.1 .8 100 250 6222.7 420 6231.4 tt50 6233.2 30 25 55 6232.2 .9 30 25 55 6232.2 .9
1 L-13 462.13 600 6229.8 6234.1 8.9 30 250 6232.9 420 6233.6 t150 6235.5 * 6234.1 8.9 * 6234.1 8.9
1 L-13 465.38 600 6244.7 6249.8 10.0 30 250 6248.1 420 6249.1 lt50 6251.6 * 6249.8 to.O * 6249.8 10.0
1 L-t3 468.86 350 6262.5 6265.4 8.8 20 100 6263.7 250 6264.9 500 6266.2 * 6265.4 8.8 * 6265.4 8.8
1 L-13 470.00 350 6266.6 6290.8 .3 140 100 6272.0 250 6279.2 500 6291.5 10 25 35 6290.8 .7 10 25 35 6290.8 .7

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