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FLOW STRUCTURE TYPICAL PROFILE <br />CHANNF!_ BOTTOM (RFVFG 1 <br />---": <br />IN. 40 FROM RIVER BANK <br />' <br />5'MIN. <br />PLATTE RIVER <br />I <br />:� �_ ____.- <br />--_.__ _: . <br />VARIES <br />�.. ___ ——� - _ _ ._ <br />_ <br />TM IN. 6 BE <br />_- RECLAIMED P�1ND <br />OW RIVER THALWEG <br />_ _. _.._. <br />4M <br />,moo <br />am <br />.r. S <br />CONCRETE CUTOFF CONCRETE CUTOFF <br />�— <br />�__v M <br />PIT BOTTOM ON <br />' ._D <br />BEDROCK <br />47Y6 <br />4M <br />4eoo <br />.__ EST. RIVER THALWEG _._ <br />4790 <br />ERTAL <br />10"T�E <br />U2 <br />t BEDDING LAYER <br />�.-.�_—...� <br />4700 <br />4786 <br />1 <br />MIN.15' <br />1L <br />Ir 1 <br />3' <br />MIN. 5' DEEPER <br />THAN RIVER THALWEG <br />0 RIVER SIDE CONCRETE CUTOFF WALL <br />FLOW STRUCTURE <br />SECTION (TYP.) <br />CUTOFF WALL CHANNEL BOTTOM <br />& SIDESLOPE VEGETATED <br />EXTENDS 10' PAST SLOPE A ACCORDING TO REC. PLAN <br />::: EXCAVATED INTO 51 <br />f% .Y NATIVE MATERIAL +' <br />CONCRETE CUTOFF WALL (TYP) <br />NO. 5 REBAR ON 12" CENTERS <br />CONCRETE CUTOFF WALL <br />HIGHER ON SLOPES <br />BURY ARMOR UNDER TOPSOIL <br />DEPTH ACCORDING TO RECLAMATION PLAN <br />RIVERSIDE ARMORING <br />RIPRAP TYPE VL <br />PIT SIDE CONCRETE CUTOFF WALL <br />r-- MIN.15' <br />BURY ARMOR UNDER TOPSOIL <br />DEPTH ACCORDING TO RECLAMATION PLAN <br />10 <br />I <br />i <br />T MIN. DEPTH <br />EXCAVATED INTO <br />NATIVE MATERIAL <br />NOTES: <br />A) CONCRETE CUTOFF WALL TO BE INSTALLED IN AN EXCAVATED TRENCH. <br />B) EXTEND RIPRAP ARMORING AND CUTOFF WALLS A MINIMUM OF 10' BEYOND THE TOP OF SPILLWAY SLOPES ON BOTH <br />ENDS. <br />T r—� 1-1 1 1 PITSIDE ARMORING <br />5' y — I I III— RIPRAP (D50 = 48'") OR SOIL CEMENT <br />III— PLACED TO A MIN. OF 5' BELOW RIVER THALWEG ELEV. <br />t±A I I i it 10'" TYPE 11 BEDDING <br />CONCRETE CUTOFF WALL (TYP.) EXCAVATED INTO <br />NO.5 REBAR ON 12" CENTERS <br />NATIVE MATERIAL <br />Mile High Flood Controi District <br />R prop Sizing - River <br />Assuming channel Is running full up to 1-ft of freeboard. <br />fit <br />Mean Channel Velocity: V = T09 <br />s <br />Channel dope: S = 0.02 <br />C V * S0..1� <br />1<. <br />Mean Rock Size: d5O YF ft = 4,613 in <br />f't <br />! 4.5 --- * (2 5 - I,ii.66 <br />l s <br />Ripirap Type VL (d530 = 6 Inches) <br />• <br />OEM <br />Colorado Division of Reciama6olls <br />Mining and SafeV <br />