2008-07-28_HYDROLOGY - C1981012

• Permit No: C1981012
• IBM Index Class Name: HYDROLOGY
• Doc Date: 7/28/2008
• Doc Name: 2nd Quarter 2008 Sedimentation Pond Inspection Report
• From: Peak Project Management, LLC
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspect
• Email Name: KAG
• Media Type: D
• Archive: No

TABLE 23
SEDIMENT POND DIMENSIONS

?vz2
yv?2 Pond No.
?3
yv??
Elevation of Upstream
Toe (Ft) 7,446.00 7,450.0 7,370.0 7,428
Elevation of 3 Year
Sediment Volume (Ft) 7,448.03 7,453.0 7,371.3 7,438
Elevation of 10 year
24 Hour Event (Ft) 7,449.95 7,456.0 7,378.2 7,451.75
Elevation of Emergency
Spillway (Ft) 7,451.20 7,457.0 7,379.5 7,452.75
Elevation of Top of
Structure (Ft) 7,452.00 7,459.0 7,381.5 7,459
Elevation of Peak 25-year
24-hour Storm Flowing
at Design Depth 7,450.06 7,458.0 7,380.5 7,455.85
Freeboard (Ft) Between

Dam Crest and 25-year v
24-Hour Storm Flowing at
Design Depth 1.94 1.00 1.00 3.25
Width - Top of
Structure (Ft) 81 12.0 12.0 15
Upstream Slope
of Embankment 1V:3.6H 1V: 2H 1V:2H 1V:3H
Downstream Slope
of Embankment 1V:3.8H 1V:3H IV:3H 1V:2.5H
Elevation of Top of
Primary Riser 7,450.57 7,378.5 7,451.75
11995 Survey
21981 Survey
31985 As-Built
41984 As-Built
SDesign Depth of 0.5 PMP Storm
Note: Calculations for Ponds 004, 005, and 007 are shown in
Exhibit 19. Design for Pond 008 are provided in Exhibit 20.'
Pond 006 is now a process pond.
2.05-16 (revised 8/29/97)