PERMFILE49647

• Permit No: C1981029
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: 2.05.3 OPERATION PLAN PERMIT AREA
• Media Type: D
• Archive: No

TABLE 2.05.3-3
Computations and data to determine capacity of ditches to culverts end runouts along exi sting haul road from load-out faclllty to
Meadows No. 1. Formula to compute ditch capacity Is: Q (CFS) ~ A (1,486/n) (R 2/3) (S 1/2I, Velocity computed~ by Manning eQuatlon,
~ ~ SUN COAL COMPANY - MEADOMS N0. 1
ROUTT COUNTY, COLORADO
Parabolic Ditch
Item Ditch Location Slope Roughness Aree Hydraulic Discharge Capacity Velocity Discharge From
Number To Culvert or Runout ft./ft, n e-ft2 Radius R (CFS) (CFS) (FPS) Remarks Table No.- Item

I Enira nee to Meadows 1 ,055 .025 2.77 ,533 1.14 16,9 4.15 Mest d1Teh 1 1
to Culvert No. 10
2 Culvert No. IO to .064 .025 2,17 ,533 1.73 18.4 4.90 MIST ditch 1 2
Culvert No. 9
3 Culvert No. 9 to ,067 .025 2.17 ,533 ,53 18.9 3.50 Nest ditch 1 3
Culvert No. 8
4 Culvert No, 8 to .065 .025 2.17 ,533 3.28 18,6 5.89 west ditch 1 4
~ Culvert No, 7
.-~
~
0
5
Culvert No, 7 to
.063
.025
2.17
,533
1,33
18.3
4,45
Nest
ditch
I
5

i Culvert No, 6
5A Meadows Perm It Boun- .078 .025 2.17 ,533 3.90 20.6 6.64 East ditch 2 11
dory to Runout 5
6 Culvert No. 6 to .047 .025 2,17 .533 2.31 15,3 4.77 Mest ditch 2 1
Runout No. 4
7 Runout No. 4 to ,035 .025 2.17 ,533 2.53 13,2 4.39 tlest ditch I 6
Culvert No, 5
8 Culvert No. 5 to .063 .025 2,17 ,533 1,32 18,3 4.48 Eest ditch 1 4
Culvert No. 4
BA Culvert No, 5 to .110 .040 2.17 ,533 8,16 21,7 6.59 DItcA across 1 6
Culvert No. 3 switchback 2 2
3 11
9 Culvert No. 4 to .055 .025 2.17 ,533 ,50 16.9 3.07 Eest ditch 2 4
Culvert No, 3
z 1 9
~0 10 Culvert No. 3 to .053 .025 2.17 ,533 6.90 16.6 6.79 East ditch 2 14
• Culvert No, 2
cn
~ 11 Runout No. 5 to ,063 .025 2,17 ,533 4.13 18,3 6.25 East ditch 2 2+12
~
rn Runout No. 3