PERMFILE48640

• Permit No: C1981019
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: Sections 7-14
• Section_Exhibit Name: EXHIBIT 17 Haul Road PART 2
• Media Type: D
• Archive: No

TABLE 8
SEDIMENTATION POND DATA - PART II t
REVISED (July 30, 1984) r
r,
Item Sedimentation Ponds
(1) (2) (3) (4) (5) (6) (7)

Sedimentation Pond No. 1 2 3 4 5 6
Designation Taylor Gulch Streeter Gulch Work Loadout Stoker
Tributary Gulch A Rrea Area Siding
Pond Elevation:
invert 6935.0 6581.7 6611.0 7149.5 6381.0 6322.1
Principal Spillway 6939.0 6584.0 6615.0 7154.5 6385.9 6327.1
Emergency Spillway 6945.0 6589.0 6620.0 7156.0 6390.4 6329.5
Top of Embankment 6947.0 6591.0 6622.0 7158.0 6400.0 6332.8
Heights:
Pond Invert to Principal Spillway 4.0 2.3 4.0 5.0 4.4 5.0
Principal Spillway to Emergency Spillway 6.0 5.0 6.0 1.5 5.0 2.4
Subtotal 10.0 7.3 10.0 6.5 9.4 7.4
Emergency Spillway to Top of Embankment 2.0 2.0 2.0 2.0 9.6 3.3
Total 12.0 9.3 12.0 8.5 19.0 10.7
Principal Spillway:
Type pipe pipe pipe pipe pipe pipe
Diameter 12" 24" 12" 12" B" 12"
Entrance Restriction Diameter 4.5" 13" 4" none gated none
10-yr Floor Routing Max. w.s. 6943.0 6987.0 6617.9 7151.6 ~ 6386.5 6326.9
10-yr Flood Detention Time (hr) 25.5 24.0 23.0 ~ > 24 > 24 > 24
Emergency Spillway:
Runoff Volume 25 yr 24 hr (acre feet) 18.2 22.8 11.1 5.7 4.5 1.1
Spillway Outflow (cfs) 36 41 25 0 0 0
Width (f t) 30 30 15 10 2.5 dia. 5
Maximum w.s. 6945.34 6589.54 6620.42 <7156.0 6392.25 <6329.5
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