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EAST EMERGENCY - <br />SP /LL WAY 30' CMP <br />CUL VERT <br />RIP RAP — <br />D50 = 6.7" <br />RIP RAP <br />D50 6" <br />RIP RAP — <br />O50 = 6.7' <br />WEST EMERGENCY - <br />SPILLWAY 30" CMP <br />cut VERT <br />H <br />W <br />W <br />W <br />w <br />a <br />(0 <br />NA TURAL <br />R/PRAP <br />13 <br />12 <br />11 <br />10 <br />9 <br />8 <br />7 <br />6 <br />5 <br />4 <br />3 <br />2 <br />O <br />N <br />b <br />W <br />W <br />h <br />W <br />2 <br />m <br />W <br />O <br />O <br />h <br />' o r <br />b <br />A' <br />2 <br />CONCRETE HEADWALL <br />INVERT ELEV. 624/.5' <br />IF <br />6255 <br />h <br />W 6245 <br />O <br />ti <br />4i 6235 <br />W <br />WEST EMERGENCY SPILL WA Y <br />130" CMP/ INV. ELEV. 624/.5' <br />ELEV. 6241.22' <br />l0" 0 GATED DECANT <br />INV. ELEV. 623701'_0 <br />CENTER EMERGENCY SPILL WAY <br />130" CMP RISER/ /NV. ELEV 624/.3' <br />POND BOTTOM ELEV. 6230.0' <br />A' <br />6255 <br />ST EMERGENCY SPILLWAY <br />)" CMP/ INV. ELEV. 624/.5' 6245 W <br />O <br />2 <br />6235 <br />W <br />N 6225 6225 <br />N � <br />HORIZONTAL SCALE: 1" = 20' <br />PRINCIPAL SPILLWAY - /0" CMP <br />WITH A /0" 0 GATED DECANT D <br />INVERT ELEV. 6237.0/' m \ <br />N <br />rFIV TFP FMFPrFA/rY .SPIT I WAY iD <br />A <br />PLAN VIEW - SEDIMENT POND N0.4 <br />SCALE: 1" 30' <br />25YR.124HR. EVENT ELEV. 624263' <br />ACTIVE <br />PERMANENT POOL /DECANT) ELEV. 623701 ' <br />I <br />SEDIMENT ELEV. 6235.71' <br />I I I <br />I I I <br />INA CTIVE <br />I I I <br />I I I <br />I I I <br />I I I <br />0 I 2 3 4 5 6 7 <br />STORAGE (ACRE -FEET) <br />STAGE / STORAGE CURVE <br />SEDIMENT POND NO.4 <br />POND BOTTOM <br />SEDIMENT LEVEL <br />PERMANENT POOL LEVEL <br />SPILLWAY INVERT <br />�B' <br />6255 <br />ti <br />W 6245 <br />0 <br />h <br />W 6235 <br />W <br />6225 <br />I W <br />STORAGE CAPACITY TABLE <br />SEDIMENT POND NO.4 <br />FREEBOARD 1.37' <br />�IS� <br />TOP OF EMBANKMENT <br />ELEV. 6244.0' <br />J I T <br />2 / <br />L _ 2.6 <br />/0" CMP <br />�— 30" CMP <br />NA TURAL RIPRAP <br />CROSS SECTION A -A ' <br />SEDIMENT POND NO.4 <br />25YR.124HR. EVENT ELEV. 6242.63' <br />CENTER EMERGENCY SPILLWAY INV. ELEV. 624/.3' <br />30" CMP RISER <br />" ,0' GA TED DECANT INV. ELEV. 6237.0/' <br />POND BOTTOM ELEV. 6230.0' <br />CROSS SECTION B -B' <br />SEDIMENT POND NO.4 <br />ELEV. <br />-■ <br />Li <br />I <br />HORIZONTAL SCALE: 1" = 20' <br />6255 <br />ti <br />6245 W <br />Lai <br />0 <br />6235 <br />W <br />6225 <br />In — liil <br />PROFESSIONAL ENGINEER'S CERTIFICATION <br />I, Mark S. Chalmers, certify that this map <br />was prepared unde supervision and all <br />the Informal /on Al l ereon is true <br />and correct t y know /edge <br />�. �• o <br />and lnformat' n. Q �% <br />9 I �/9� • <br />Date M Chol ° CO P.E.25653 <br />��sS�ONAL <br />R Ecrl;6 E I'VE D <br />SEP 19 1991 <br />Mined Land <br />_ IRarh..,..a_ _ <br />Pe ,t N be <br />CSelacstsio: ermit <br />hbit T.�� - -- 2.3 ------ <br />-_,_ -_ - - -__- <br />Class. O Revision ! <br />i_ TYpe /Seq: ----- - ----- - ----- - ----- ------ -! <br />Class: 0 Report O Hydro OGenerel <br />Doc Type: ___ ________________________ <br />DApplication (Coal only) ❑Bond ❑Enforcement 0 Inspection <br />NEW PRINCIPAL SPILLWAY <br />MAP 23 <br />111111 11111 11111 11111 lllu nuunnm <br />null nlll VIII VIII VIII VIII /III /III <br />oozaee <br />