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6.4.7-A2 NO RISE CERTIFICATION REPORT <br />COINCIDENT EXISTING AICI <br />t <br />M'0 <br />CDM <br />00 z, cn 00 <br />i_ <br />�s <br />170 <br />4870_ <br />-�. <br />8> <br />w <br />x <br />0 <br />M <br />Q <br />0 <br />00 <br />O <br />N <br />N <br />a, <br />0 <br />E•-- <br />0 <br />n <br />iz <br />'S <br />z <br />Q <br />q <br />0 <br />0 <br />1 <br />IL <br />cn <br />Q <br />J <br />V) <br />CD <br />W <br />l_t <br />z <br />Q <br />0 <br />I.L <br />i— <br />n <br />W <br />Q <br />0 <br />0 <br />I-- <br />Q0 <br />d- <br />co <br />E <br />0 <br />z <br />C- <br />ROPOSED 100-YEAR FLOODPLAINS <br />('o <br />G� <br />o + <br />+ <br />o ' <br />I <br />Ali.{t eV11 v vr� <br />CON <br />co I If <br />\ I 1 <br />cra <br />4835 4S30'"' w cu <br />f <br />\, <br />483 452 0) Big Thompson BT: Lower Reach <br />r 4820 <br />-I_�`sLIMITS OF MINING <br />4s,111:5� OPERATIONS <br />Qco610�`Cb <br />CO <br />/ %... ! i <br />800 <br />t r <br />EL 1 rn I I PROPOSED CONDITIONS <br />VEHICULAR ACCESS ;N �p o, 1 ` 100-YEAR FLOODPLAIN <br />POINT TO SITE `s <br />f � p <br />EXISTING CONDITIONS <br />f ti 100-YEAR FLOODPLAIN <br />s <br />-- <br />00 <br />00 <br />'yEp \ , <br />t <br />CELL 3 \ ��0 <br />\ \ <br />1 <br />w, CELL 5 -•_ �_. ` r �\ <br />PROPOSED HOT MIX ASPHALT <br />PLANT AND SCALE HOUSE. 5 <br />41 <br />ELEVATE 1-FT ABOVE \4 ` a / 480r\�'� <br />PRELIMINARY 100-YEAR �\ '' CELL 2 <br />CHAMP BFE TO ELEVATION <br />4810.64-FT (NAVD-88). ,' ,l 1, ` �,ti c 15, ;,; k. tea,©a80, <br />ROW -- ROW ROn —. ftOW •,RO'N ROW ... ROW .ROW ROW, `ROW ROW ROW R ROW ROW ROW ROW <br />e , <br />O <br />_ ...._.. <br />R _ <br />h <br />54 c°.11 <br />WCR <br />ROW ROW — -- PAW -- ROW ___-_ .- . ;. Q...5 ". �^'. W ROW ROW wm �.�__._ RO':' <br />s y <br />RO ROW: RCW ROW it.,. W 8L/ ROW R� ROW W <br />S <br />r , <br />\tag'✓}5'810 8� o - <br />3, x i <br />r" <br />r` \ t11 Er\ t <br />`\ � f .. �- CR 13 Split Reach <br />`-,.'\ `e d ``..rr\ \ ,, �``• '- ti, y ' , ,P � �:: ,,!` •' ""...., f ^o. ' 4Si SIJ S I / '`` """ µ^ „ ., ;�' <br />;4805 '`-'> ` `' i <br />1 <br />" I <br />_1 <br />T <br />\>\j\% \.. b4815 Ire/t 4780 <br />yy <br />.-A). <br />a o <br />\Sr r. <br />g <br />,mom . <br />g25 48� o ,� 0)h <br />O s % 47 �°j I/ <br />\ 4835 <br />3r/ _ <br />0\\_. a.4 <br />r 1 \ \\\t ar \ <br />_,A <br />1 \ y <br />\ w \ <br />v v i 01 <br />F , <br />vv <br />! 4470 <br />I / v <br />J— <br />, <br />1 ! � t Cps ;:..i'`°.i t { ♦ \ I <br />t E �1 <br />1 \ f I \ <br />O <br />�- <br />85 <br />00 41- <br />0. <br />4815 <br />NN <br />4 ` \ L o frl t \ <br />+t <br />'184 r } 1 <br />PROPERTY OWNER: <br />COULSON EXCAVATING CO INC <br />3609 N COUNTY ROAD 13 <br />LOVELAND, CO 80538-2399 <br />LEGAL DESCRIPTION: <br />PT SW4 19 5 67 BEG SW COR SEC NOD30'E 2583.88' TO PT <br />50'S OF NW COR SW4 S89D56'E 350' S44D25'E 534.03' TO <br />EXISTING FENCE LN S27D23'E 372.46' S74D58'E 695.11' <br />N77D12'E 250.36' NO2D39'W 40.1' N88D42'E 326.85' S73D35'E <br />141.23' S58D47'E 211.3' N88D47`E 76.07' TO E LN SW4 SOD23'E <br />1646.35 W2562.26' TO BEG EXC E40' W70' <br />`mod <br />/N <br />0 400' 800' <br />SCALE IN FEET <br />LEGEND: <br />EXISTING MAJOR CONTOURS <br />EXISTING MINOR CONTOURS <br />PROPOSED MAJOR CONTOURS <br />PROPOSED MINOR CONTOURS <br />REGULATORY 100-YR FLOODPLAIN--xh"{m a M sMw <br />REGULATORY 500-YR FLOODPLAIN <br />REGULATORY ZONE AO <br />EXISTING 100-YR FLOODPLAIN <br />PROPOSED 100-YR FLOODPLAIN <br />PROPOSED BFE ^AAAA480 <br />VVVVVv- <br />CROSS SECTION <br />FLOW LINE <br />PROPERTY LINES - - - - - - <br />SECTION LINES — — <br />NOTES: <br />1. SURVEY CONTROL: <br />HORIZONTAL CONTROL IS COLORADO STATE PLANE <br />NORTH, NAD83, US FEET. ALL ELEVATIONS ARE FEET, <br />NAVD-88. <br />2. THE REGULATORY FLOODPLAIN LINEWORK IS THE <br />CURRENT EFFECTIVE FLOODPLAIN LINEWORK SHOWN <br />ON FIRM PANELS 08123C1490E AND 08123C1495E. <br />3. THE EXISTING AND PROPOSED FLOODPLAIN LINES ARE <br />THE EXTENTS OF THE 100-YEAR INUNDATION BASED ON <br />THE EFFECTIVE 100-YEAR DISCHARGES IN THI <br />S S REACH. <br />UPSTREAM OF WCR 13 AND DOWNSTREAM OF WCR 54, <br />THE EXISTING AND PROPOSED FLOODPLAINS ARE <br />COINCIDENT, SHOWING NO IMPACTS OF THE PROPOSED <br />GRAVEL MINING OPERATIONS ON FLOODPLAIN OFF THE <br />PROJECT SITE. <br />4. WITHIN THE PROJECT SITE, THERE IS NO RISE IN WATER <br />SURFACE ELEVATIONS DUE TO THE PROPOSED GRAVEL <br />MINING OPERATIONS. <br />5. BETWEEN XS 82986 AND XS 82282 AND BETWEEN XS <br />76888 to XS 71810, THE GEOMETRY OF THE CROSS <br />SECTIONS WAS TAKEN DIRECTLY FROM THE 2016 <br />CHAMP MODEL AND IS UNCHANGED IN THE EXISTING <br />AND PROPOSED CONDITIONS HYDRAULIC MODELS. <br />6. THE ELEVATION DETERMINATION FOR THE LOWEST <br />ADJACENT GRADE AT THE MIX PLANT WAS DETERMINED <br />USING THE PROPOSED CONDITIONS GEOMETRY AND <br />THE FUTURE CHAMP 100-YEAR FLOW RATE. THIS <br />RESULTED IN A WSEL AT XS 81882 OF 4809.64-FT <br />(NAVD-88). THE LOWEST ADJACENT GRADE FOR THE MIX <br />PLANT SHOULD BE 4809.64-FT + 1-FT = 4810.64-FT. <br />'" <br />NOV 7 14 2019 <br />DIVIBION OF ReC.LAW <br />M i Ni t"I tii SAFETY T <br />A L t'YT i t4 <br />ONE INCH - IF NOT, <br />SCALE ACCORDINGLY <br />071 <br />Fr 0 <br />a) <br />(0 <br />.5 <br />-0 <br />D L0 <br />m <br />c <br />m N <br />�� <br />0o <br />mO(0 <br />�LO <br />LL <br />ON <br />0 N <br />O <br />r <br />M u- <br />V) <br />W <br />Q <br />U <br />O <br />V J <br />U) <br />Q <br />0. <br />c� <br />G <br />0 <br />W Z <br />Q <br />J <br />0. <br />0 <br />0 <br />0 <br />_J <br />LL <br />W <br />0— <br />Z <br />J <br />0. <br />a <br />0 <br />0 <br />J <br />LL <br />0— <br />z <br />W <br />Q <br />a� <br />0 <br />0 <br />N <br />Q <br />m <br /><C N <br />u) M m N <br />M <br />U = <br />� � C O <br />U Q <br />PROJECT NO. <br />36 4667.00 <br />DRAWING NO. <br />W-01 <br />SHEET 1 OF 1 <br />