|
LEGEND
<br /> PERMIT BOUNDARY -SS EXISTING SANITARY SEWER
<br /> - a ------- -------
<br /> rr _
<br /> • ' �� 1[Y�eI'�� � ��' Y = PROPOSED HAUL ROAD -EXISTING 5 FOOT CONTOUR
<br /> { fie.c/
<br /> - IRRIGATION DITCH -- II[l.[ - ,..j - - - PROPOSED MINING LIMITS --------EXISTING 25 FOOT CONTOUR
<br /> �
<br /> ZOF
<br /> I r t EXISTING PARCELS ■ �����■SLURRY WALL
<br /> IN
<br /> cR e'
<br /> PERMIT BOUNDARY TVP jW
<br /> -r - EXISTING DITCH 100 YR EFFECTIVE FLOOD PLANE �
<br /> r I ! ✓ 5
<br /> G EXISTING GAS LINE - 100 YR PRELIMINARY FLOOD PLANE
<br /> S �
<br /> \\l HE EXISTING OVERHEAD ELECTRIC ,t.- 100 YR PROPOSED FLOOD PLANE
<br /> r! v _
<br /> 1� I _•! CULVERT � ( �`. \.; �-.
<br /> I'
<br /> NOTES 7.THE PROPOSED FINAL LAND USES FOR THE IRWIN/TMOMAS MINE ARE GENERAL AGRICULTURE OR LAND USE APPROVED BY THE CITY Of LONGMONT.
<br /> r
<br /> F7 AGRICULTURAL USES SHALL BE LIMITED TO CROP PRODUCTION AND MAY NOT INCLUDE ANY LIVESTOCK.
<br /> ,_Y 4 '+T `' •� ('p / - Z.
<br /> RECLAMATION PLAN MAP ILLUSTRATES CONDITIONS WHEN ADEQUATE QUANTITIES OF OFF-SITE BACKFILL MATERIAL ARE AVAILABLE AND A
<br /> POND
<br /> 3 ACF - - BACKFLLED TO CREATED UPLANDS,OPEN WATER PONDS AND AUGMENTATION
<br /> LIMITED TLAND AREASGROUNDWATER HAS BEEN OBTAINED.MINED CELLS WILL BE
<br /> �1
<br /> PERM
<br /> ENT SOURCE
<br /> F WATER
<br /> OR LONG TERM
<br /> j _ _
<br /> " WETLAND `^i �`: a� p /' + - 3.AlL SLOPES SHALL BE GOADED TO 3H IV OR FUTTE0.SLOPES WITHIN THE ST VRAIN CREEK DELINEATED FI00 YEAR FLOODPLAIN SHALL BE GRADED TO
<br /> 8 7 AC / `mil ( , , n / / �_
<br /> !��NDIII.l- i T,. ,// / 4:1 OR LOPES S ROUGH GRADING WILL ESTABLISH FINAL ELEVATIONS,SLOPES,AND TRANSITIONS.TRANSITIONS BETWEEN UPLANDS,WETLANDS,ANDI � POND SLOPES SHALL BE GRADED WITH A SMOOTH,GRADUAL TOPOGRAPHY.
<br /> _ �--.ir - =INAL GRADING WILL INCLUDE ADDITION OF TOPSOIL AND SURFACE PREPARATION FOR REVEGTATION.SPECIALATTENTION SHALL BE GIVEN TO
<br /> _ Imo__ L • " ..
<br /> R� •_ -+ �� ( I ••8.311 - I :,,I�• \ £ 1 TRANSITIONS FROM RECLAIMED AREAS TO UNDISTURBED LAND. a¢0
<br /> PERMIT BOUNDARY(TYP) t. � _- ` ,/ !` f i .c.,, , S.ALL AVAILABLE AND OVERBURDEN MATERIAL WILL BE USED FOR BACKFILLING AND RECLAMATION. dE BW
<br /> II -- - C+• h\ _ i RI' \ 6.THE GROWTH MEDIUM FOR REVEGETATION WILL BE ACOMBINATION OF OVERBURDEN AND TOPSOILS. BW
<br /> --
<br /> t `
<br /> TWO DIFFERENT MIXES OF UPLAND GRASSES WILL BE USED IN AREAS THAT WILL NOT EXPERIENCE PERIODIC FLOODING,SEASONAL GROUNDWATER,
<br /> .- •\, ,« OR OTHER MOIST SOIL CONDITIONS.ONE SEED MIX WILL BE USED SIMPLY FOR QUICK SOIL STABIUZATION AND EROSION CONTROL.THIS MIX WILL A9L
<br /> RECLAIM GROUNDWATER j` - ", • \ MAINLYBEUSEDIN MAI WHERE FURTHER AGRICULTURAL OR OTHER DEVELOPMENT 15 EXPECTED TO OCCUR FOLLOWING PERMIT RELEASE.THE 1241.0001 DRMS
<br /> DISCHARGE TO CREEK PER SECOND GRASS SEED MIX FOR AREAS LEFT AS OPEN SPACE IS COMPOSED OF A LONG LASTING AND REGENERATING NATIVE UPLAND SEED MIXTURE
<br /> I
<br /> MINING PLAN CREEIC RECLAIM GROUNDWATER
<br /> DISCHARGE TO CREEK PER .. r - -- Upl•rMGre -.-_sta6anhpn Apyllorbn R.te•IwLs/etnl tlplead Gr seed-N..Open Spt ypirxm Aete•(wts/evel
<br /> 4.2�AC�D •' '.:_. MINING PLAN �.
<br /> Inhe[n dla@Whey rd 3 We54rn Wh® ra 4
<br /> 'y IK: „ t D-, emPGrama GIs stye.area t
<br /> ;. - " i 14AC Airalla o sa is
<br /> TOTAGREENWAY -- -- '
<br /> - - ` - a 11i '. "'-�.._. Y ^' '• :APP a S-od assama t'L TS
<br /> 5
<br /> " Appl[a t drll seMl seed OS s s L,1^•«.�,•� • ng.It seM is to he 0roaticasL The �etldr ass t
<br /> ayplrcat on resew II he auuElea. ndran R<
<br /> e+-oP1T POND D ..- • TOTu 9' 3 POND C '-�-L„f
<br /> R.5 ACRES �-[bU 8.4 ACRES , -.- •APPlcato'1Wi1 for d1illseNing.If—is to beb-&-t.The
<br /> -- •.. ` ,o _ I� r..11 _-_-=,_ --"t avphca[Pnrate wlll be epublN.
<br /> 9 IN AREAS WHERE WETLANDS COULD POTENTIALLY BE DEVELOPED,THE SEED MIXTURE WI ILL BE MODIFIED TO INCLUDE MOR TRANSITIONAND
<br /> WETLAND GRASSES AND GRASS-LIKE SPECIES.THESE SEED MIXES,ESPECIALLY IF STANDING WATER OR SATURATED SOILS EXIST DURING PLANTING,WILL
<br /> LIKELY NEED TO BE BROADCAST.
<br /> ^r R$EEFK PEGR� .- -. ,,� we[W.M.i Grau Seed APPK[rtbn RNe"(WLs/ace)
<br /> Y
<br /> Irp ,.. Western Whea rass 2.5 ROW - - MINING PLAN '.'
<br /> Iv -•,.., - S•ANh raa, z.s
<br /> - .-`mRIPARIAN
<br /> J Jx4fh"i', .5
<br /> E.KEN PRATT Bow
<br /> j FX SANITARY SEWER r ,1{HWYl18� - .. �e 9t RPOVIDE ENHA
<br /> ARIAN AREA CED * _ .�. C.1-d-0 1�s
<br /> }:. J ebr,
<br /> ���� G Tnnaow sea e u
<br /> 1� !! EX STORM SEWER I STORM CANNEL 1� ttt 4I Tot,I anon ram's rordoll sccainR UscceHroxwoaeas+.Top
<br /> F� - aApipl rate w h ee apymea.
<br /> j - Pit
<br /> YR PRELIMINARY�-�� 1
<br /> / 20190930 FIRM F080OD1 CO= \ r ( 14 9ACRES 9.UPLAND GRASS SEED WILL BE PUNTED WITH A DRILL EQUIPPED WITH DEPTH BANDS AND PRESS WHEELS.THE SEEDED AREA WILL THEN BE COVERED
<br /> w; Nr. ;,. WITH CERTIFIED WEED-LESS STRAW MULCH AT A RATE OF 2,000 POUNDS PER ACRE.THE STRAW WILL BE CRIMPED INTO THE SOIL TO CONTROL
<br /> . a WETLAND��\ , POTENTIAL SLU RRY WALL-ENGI IN E R E D DI S I(,N EROSION UNTIL THE GRASS BECOMES ESTABLISHED.
<br /> Q W 100 YR EFFECTIVE
<br /> BE SUBMITTED TO DRMS FOR Ac PROVAL 30.DRILL SEEDING IS THE PREFERRED METHOD FOR REVEGETATION.IF BROADCAST SEEDING IS NECESSARY ON MOIST SOILS,STEEP SLOPES,OR IN
<br /> FLOODPLAIN EXCESSIVELY ROCKY AREAS,SUCCESS CAN BE ENCOURAGED BY BROADCASTING ONTO GROWTH MEDIUM THAT IS VERY LOOSE.IF THE SEED IS Z
<br /> Uj
<br /> POND A 20121218 FIRM 0801CO289J
<br /> ` 15.2 ACRES UNINCORPORATED ^- BROADCAST IN THOSE CIRCUMSTANCES,THEN THE SEEDED AREA WILL BE DRAGGED TO HELP BURY THE SEED. Z Q
<br /> III w�t> BOULDER COUNTY 11.PERIODIC INSPECTION FOR NOXIOUS WEEDS,AT LEAST ONCE A QUARTER,AND MORE FREQUENTLY AS NEEDED,WILL BE DONE AS PART OF A WEED J
<br /> AGRICULTURE MANAGEMENT PUN
<br /> O ^
<br /> J _ erW- I t w 12.THE MINE OFFICE/SCALE HOUSE TRAILER AND ANY OTHER STRUCTURES ASSOCIATED WITH MINING WILL BE REMOVED FROM THE SITE DURING FINAL nl Ri
<br /> T 1 I RECLAMATION ACTIVITIES. •L l
<br /> < 1i L
<br /> 11 AREA TO BE RECLAIMED TO 13.BEST MANAGEMENT PRACTICES WILL BE USED TO CONTROL EROSION AND STOflMWATER SUSPENDED SEDIMENT RUNOFF FROM THE SITE DURING �l
<br /> t
<br /> BONUS DITCH ALIGNMENT I� UPLAND AND REVEGETATED saas �L` RECLAMATION ACTIVITIES. S lli.- O
<br /> h AS PART OF THE MLRB y
<br /> 1p RECLAMATION PLAN. �� 100 YR EffECT1VE FLOODPLAIN -, POND LINER NOTES =
<br /> _20121218 FIRM 0901C_02BB.1 ' _ p• _mot a
<br /> + 1.PR OR TO CONSTRUCTION,OVERBURDEN AND CLAYSTONE MATERIALTESTING SHALL BE PERFORMED FOR USE IN FINAL DESIGN THE FOLLOWING
<br /> WICKSILVER RD arra SPECIFICATIONSAND PROCEDURESARE PROVIDEDAS A GENERAL GUIDELINE FORPERMITTING PURPOSES.FINAL SPECIFICATIONS AND DESIGN CRITERIA [`\ Q
<br /> WILL BE DEVELOPED DURING THE FINAL DESIGN PROCESS. '�w�0 htp0_vP ^" w J
<br /> l.� 2.EACH LAYER OF FILL SHALL BE SCARIFIED TO ALLOW PROPER BONDING BETWEEN DYERS.
<br /> THIS AMENDMENT REMOVES THIS 100 YR PROPOSED FLOODPLNN- - ` UUU
<br /> T I "PORTION OF THE PERMIT AREA LONGMONT FLOOOPLAIN APPEAL 3 DENSITY AND MOISTURE CONTENT TESTING SHALL BE PERFORMED AT A RATE OF 1 TEST FOR EACH 2.000 YARDS PLACED. 5
<br /> _ FOR DEVELOPMENT IN THE CITY ^ -" "" ar°''ro
<br /> Lu
<br /> OF LONGMONT AI`i I � /� �\`` a 4 ALL CLAY LINER MATERIAL SMALL BE COMPACTED TO A MINIMUM 95%ASTM-D698]8 STANDARD PROCTOR AT+2%OF OPTIMUM MOISTURE CONTEN I. M
<br /> • 1 S \UPL ED
<br /> �D R NGEED TO - 5.NO LINER MATERIAL SHALL BE PLACED IN THE LINER SLOPE WHILE EITHER THE MATERIAL,EMBANKMENT,OR FOUNDATION IS FROZEN. Lei LL
<br /> u C _ ' 6.NO ORGANIC MATERIAL SHALL BE PEALED IN THE LINER SLOPE
<br /> ON
<br /> AS PART OF THE MARS
<br /> REC7.EACH LAYER OR LIFT SHALL BE CONSTRUCTED CONTINUOUSLY AND APPROXIMATELY HORIZONTAL FOR THE WIDTH AND LENGTH OF EACH LIFT.
<br /> i I O D 8 1 8.LINER MATERIALSHALL BE COMPOSED OF CLAYEY OVERBURDEN AND WEATHERED CLAY'STONE THAT BREAKS DOWN DURING PROCESSING BEDROCK
<br /> ®/ g CLAYSTONE MATERIAL MAY BE RIPPED,MOISTURE TREATED,AND ALLOWED TO AIR SUKE FOR A MINIMUM OF ONE DAY PRIOR TO ITS PLACEMENT IN
<br /> THE LINER.LINER MATERIAL IS DEFINEDAS MATERIAL HAVING 4 INCH OR SMALLER COBBLE,A MINIMUM OF 50%FINES BY CLAY WEIGHT PASSING THE US
<br /> O \\\\
<br /> STANDARD ZOO SIEVE,AND APLASTICITY INDEX OF 30%OR GREATER FOR THE PORTION OF MATERIAL FINER THAN THE US STANDARD 4051EVE.
<br /> 9.SUFFICIENT MOISTURE SHALL BE ADDED AT THE BORROW AREA SO NO MORE THAN 3%ADDITIONAL MOISTURE IS REQUIRED TO BRING ANY LINER
<br /> I I - MAERIALTO SPECIFICATIONS ONCE PLACED IN THE FILL.
<br /> C
<br /> N � •. W II I �� - I y,_ Ylt _ �� -i 30.CANER MATERIAL SHALL BE PLACED IN MAXIMUM OF 9-INCH LOOSE LIFTS PRIOR TO COMPACTION.
<br /> O I
<br /> toI� I \ 11.A CATERPILLAR 915 OR 82S SHEEPSFOOT COMPACTOR(OR EQUIVALENT)WILL BE USED FOR COMPACTING EFFORTS.
<br /> EXISTING RURAL � �' I 12.THE COMPLETED LINER SHALL BE PROTECTED FROM DAMAGE CAUSED BY DESICCATION OR FREEZING TEMPERATURES BY PLACING A MINIMUM OF
<br /> RESIDENTIAL EXISTING RURAL -= 12 INCHES PIT RUN MATERIAL ON THE ENTIRE SLOPE.
<br /> RESIDENTIAL 4 13.LINED PONDS SHALL PASS LEAK TEST AS REQUIRED BY THE COLORADO OFFICE OF THE STATE ENGINEER AND COLORADO DIVISION OF WATER
<br /> RESOURCES
<br /> AJL Ri ..
<br /> _uNINCBRPORATEO----- ]� ����t SLURRY WALL LINER NOTES
<br /> BOULDER COUNTY ?�1-4 0 150 300' 600' 1.PONDS 1 AND 2 MAYBE SEALED WITH A SLURRY WALL LINER AS AN ALTERNATIVE TO THE COMPACTED CLAY LINER AS DESCRIBED IN POND LINER NOTES
<br /> ram , AGRICULTURE
<br /> 2.PRIOR TO INSTALLATION,SITE SPECIFIC ENGINEERED DESIGN AND SPECIFICATION FOR THE SLURRY WALL WILL BE SUBMITTED TO THE DIVISION FOR
<br /> HINT:rpGIrNA[.. "SLOPE TOMEET 4'1 OR 6HALOWER SLOPE Areaapproximately1.5acres.Instal-50-'lansCottonwood(5 gallon).Install irregular dusters,with APPROVAL
<br /> Nul \ GRADEAT ToIi` F WIDTH ISGRADENT VARIES irregular open grass areas:100 Western Sand Cherry(rooted cuttings),100 American plum(rooted
<br /> r.sTtxRc GIpaN;. 6'TOP SOIL AVERAGE NO- BANK UPLPIDSEED cuttings),100 Three Leal Sumac(rooted cuttings).Install plantings,seed and mulch area. 3.LINED PONDS SHALL PASS LEAK TEST AS REQUIRED BY THE COLORADO OFFICE OF THE STATE ENGINEER AND COLORADO DIVISION OF WATER
<br /> -O.F�MOEN txFu� HISTORIC OROI1taD FOR0M
<br /> ,SVq ND ATW Irrigate to establish plantings and employ comprehensive weed management TO establish upland seed. RESOURCES T8T INC.
<br /> J 1 _ MIRING HEADNAL r
<br /> i 0'-5 SCA/OYERNIRDER - - \ APPIV MTIAtGr CONSULTING ENGINEERS
<br /> D' %� 12"TOPSOIL FLOOD PLAIN NOTES 7.B whale a wpY
<br /> AxD UPLAND
<br /> _ _ R'TOPSOIL Suite 200 FM CPII'ns
<br /> t2•TopspL 55q�� - SEED FLOODPWN INFORMATION PE0.FIRM FLOOD INSURANCE RATE MAP N008013CO2871 DASD DECEMBER 18.2012 AND FIRM FLOOD INSURANCE RATE MAP Oaorode 80525
<br /> SANDJaRAv¢ ^- � NO 08013CO289J DAED DECEMBER 18,2012, Phone.970226.0557
<br /> AVERAGENORiMI
<br /> WATER SURFACE •OTHER
<br /> PROPERTY LIES IN AREAS E TDETERMINED2TO BE WITHIN AB xD
<br /> OTHER AREA$-AREAS OUTSIDE THE 2%ANNUAL CHANCE FLOOD 1241.0001.02
<br /> Pp KFIL ZONEX-AREASOF25%ANNUALCHANCEOF FLOOD ORAREAS WITH I%ANNUALCHANCE OF FLOOD WITH AVERAGE DEPTHSOF LESSTHANONEFOOT
<br /> O 1�0 IR*NAALL OR WITHIN DRAINAGE AREAS LESS THAN ONE SQUARE MILE AND AREAS PROTECTED BY LEVEES FROM THE 100 YEAR FLOOD. i=300
<br /> OIEM1 M,I r�-P100ADED 1O MAN ZONE AE-SPECIAL FLOOD HAZARD AREAS SUB1ECr TO INUNDATION BY THE I%ANNUAL FLOOD CHANCE,BASE F LOODELEVATIONSDTERMINED.
<br /> PA
<br /> �_ •ZONE AH-SPECIAL FLOOD HAZARD AREAS SUBJECT TO INUNDATION BY THE I%ANNUAL FLOOD CHANCE.F LOOD DEPTHS OF 1 TO 3 FEET,(USUALLY YE DECEMBER 2022
<br /> MINING SECTION C(DIAGONAL HATCH) SHORELINE wEFLANO aEN_N AREAS OF PONDING)BASE FLOOD ELEVATIONS DETERMINED.
<br /> $ POND RECLAMATION - T apPE TD WIDTH VARIES APPROXIMATEY 1.5 ACR
<br /> aacFr r-nArcI IRREGULAR GRADE,MATCH TO FINISHED GRADE AT EDGES THE ADDITIONAL FLOODPLAINS SHOWN ARE BASED ON PRELIMINARY FEMA FIRM MAP 08013CO299K FROM SEPTEMBER 30.2019 AND LONGMONT'S APPEAL
<br /> SHORELINE RECLAMATION ENHANCED RIPARIAN AREA OF TEMA'S PREUMINARY FIRM MAP.THESE MAPSARE NOT FINAL AND ARE EXPECTED TO BE REVISED.THESE ARE SHOWN 1 of 1
<br /> PETS FOR INFORMATIONAL PURPOSES ONLY.
<br /> Y
<br />
|