PERMFILE40533

• Permit No: C1994082
• IBM Index Class Name: Permit File
• Doc Date: 9/27/2007
• Doc Name: 25-Year, 24 Hour SEDCAD Demonstration
• Section_Exhibit Name: Tab 13 Attachment 13-3A.2 Addendum 13-3A-B
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
n..-,~~m ~ooa o9.wi~ i s~m~,~n

Yoast Mine
Pond 10
25-Year, 24-Hour Storm Event
Sediment Storage Review
(Revised for TR-35 to incorporate YPM-ZZ)
Watershed Conditions as of 08/06
Pond Capacity Per As-Bui/t (Ex, 13-4A)
(This is a conservative demonstration. It assumes the principal
spi//wayisinoperab/e, Consequentty, it~~~vemi~,~~imates
sediment storage and ca/cu/aces a copse ~~ , .;sediment
storage L~Y'evation~o°; ~,o P "ETT%c ;`~~~;
Hydro-Environmental Solutions, ~c~ i ° 18406 ~ .: ~
P.O. Box 772996 = ~ : ~ W
57 10th Street, Suite B ~ 0,~': :: _~\
Steamboat Springs, CO 80477 ~ F ~'•. ~
~~~ Ss, ' •.... ' lJ~' ~~p
~~/i /•NA ,\~y/
• G ~~/~~
Filename: Pond 10 TR35 25Yr 24Hr OB_07.sc4 Printed OB-15-2007
TR-35 13-3A-B.1 Revised 06/07