20201004 Ver 1_Design Drawings_20201110

315531603165317031753180318531553160316531703175318031850+000+250+500+751+001+251+501+752+002+252+502+753+003+253+330.0%2.8%ELV: 3171.7
ELV: 3171.7
ELV: 3167.7
BP: 0+00.0
PI: 1+90.6
EP: 3+32.6
ELV: 3170.5
ELV: 3168.5
ELV: 3168.5
ELV: 3170.5
ELV: 3170.1
ELV: 3169.7
ELV: 3169.2
ELV: 3168.8
ELV: 3168.4
ELV: 3168.0
ELV: 3167.6
ELV: 3167.1
ELV: 3166.7
ELV: 3166.4
BP: 0+00.0
PI: 0+42.0
PI: 1+50.0
PI: 1+90.6
PI: 2+05.6
PI: 2+20.6
PI: 2+35.6
PI: 2+50.6
PI: 2+65.6
PI: 2+80.6
PI: 2+95.6
PI: 3+10.6
PI: 3+25.6
EP: 3+32.6 31753170317531753180318531903195319531953175317531803185 3180318031703175318031853
1
7
5
3
1
8
0
3
1
8
5
3190319532003
2
0
0 BP:
0+00
.0
EP: 3+32.6
PI: 1+50.0
PI: 1+90.6
PI: 2+05.6
PI: 2+20.6
PI: 2+35.6
PI: 2+50.6
PI: 2+65.6
PI: 2+80.6
PI: 2+95.6
PI: 3+10.6
PI: 3+25.6 0+000+501+001+502+002+503+003+33SCALE: 1" = 40'1.1PLAN - PROFILE: BOULDER CASCADE1" = 40'THOMPSON RIVER AT SLUSHER FARM - BOULDER CASCADE
7 SAMUEL ASHE DRIVEASHEVILLE, NC 28805919.600.4790COA#: P-1932
TRANSYLVANIA COUNTY - NORTH CAROLINAPRELIMINARYDRAWINGSREVISIONSDATE: 30OCT20PLOT SIZE: 11" x 17"H.D.: NAD83V.D.: NAVD88JE PIN:TRIBUTARY
BOULDER CASCADE TO LIFT CHANNEL FORFLOODPLAIN CONNECTION. SEE DETAILSHEET 1.2 AND PHOTOS SHEET 1.3DESIGN BANKFULL STAGEEXISTING CHANNEL ELEVATIONDESIGN CHANNEL ELEVATIONGLIDE TODESIGN CASCADEEXCAVATE POOL TO ELV = 3168.5' ATEXISTING CONFLUENCE AND MEANDER BENDRUN FROMEXISTING RIFFLEEXISTINGWETLANDGLIDE TODESIGN CASCADETRIBUTARY
EXCAVATE AND GRADE POINTBAR AT 8:1 TO 10:1 SLOPERUN FROMEXISTING RIFFLEFeet02040EXCAVATE POOL AT EXISTING CONFLUENCEAND MEANDER BEND PER PROFILETHOMPSONRIVEREXISTING MAJOR CONTOUREXISTING MINOR CONTOURCHANNEL BANKFULLCHANNEL CENTERLINE315POINT BAR GRADINGBOULDER CASCADECHANNEL TOE OF SLOPE
EROSION CONTROL MATTINGA'ABANKFULL1.ALL BOULDERS USED FOR THE BOULDER RIFFLE SHALL BE STRUCTURAL STONE, CUBICAL OR RECTANGULAR INSHAPE. THE ENGINEER MUST APPROVE THE USE OF BOULDERS THAT MAY BE AVAILABLE ONSITE. BOULDERSDIMENSIONS SHALL BE 3.0' X 5.0' X 2.0' (W X L X H) +/- 0.5 FT. THE MINIMUM ACCEPTABLE BOULDER THICKNESS(H) IS 1.5'. BOULDERS LONGER (L) THAN 5.5' WILL BE ACCEPTED. DIMENSIONS AND SLOPES OF STRUCTURESDESCRIBED IN THE DETAIL MAY BE ADJUSTED BY THE ENGINEER TO FIT CONDITIONS ONSITE.2.CONTRACTOR WILL BE REQUIRED TO FIT BOULDERS TOGETHER TIGHTLY. GAPS BETWEEN BOULDERS SHALL BEMINIMIZED BY FITTING BOULDERS TOGETHER AND PLUGGING WITH NC DOT CLASS A ROCK OR CHINKINGSTONE APPROVED BY ENGINEER. HEADER BOULDERS SHALL BE UNDERLAIN BY FOOTER BOULDERS TO PROVIDEA FOUNDATION UNLESS OTHERWISE DIRECTED BY THE ENGINEER. HEADER BOULDERS SHALL BE OFFSET 1 FTUPSTREAM OF THE FOOTER BOULDERS WHERE MICROPOOLS ARE ANTICIPATED TO FORM AS SHOWN IN THEDETAIL.3.SET BOULDER INVERTS AT ELEVATION SHOWN ON THE PLAN AND PROFILE SHEETS. NO ELEVATIONS OF THEBOULDERS MAY VARY FROM THE PLAN SHEETS WITHOUT DIRECTION FROM THE ENGINEER. THE BOULDER ARMSSHALL EXTEND UP TO THE STREAMBANK AT A 1% - 2% SLOPE AND INTO THE STREAMBANK A MINIMUM OF 10.0'OR TWO FULL BOULDER LENGTHS. MAXIMUM ELEVATION DROP OVER EACH BOULDER IS STEP IS 0.3' - 0.5'.4.ON THE UPSTREAM SIDE OF THE BOULDERS, NON-WOVEN GEOTEXTILE FABRIC SHALL BE PLACED ON THE ENTIRELENGTH OF THE STRUCTURE. FILTER FABRIC SHALL EXTEND FROM THE BOTTOM OF THE FOOTER BOULDER TOTHE FINISHED GRADE ELEVATION AND SHALL BE PLACED THE ENTIRE LENGTH OF THE STRUCTURE. RIFFLEMATERIAL SHALL BE USED AS BACKFILL MATERIAL AROUND THE OFFSET BOULDER STEPS AND MICROPOOLSSHALL BE ESTABLISHED BELOW EACH STEP.5.BOULDER RIFFLES SHALL BE BACKFILLED WITH NATIVE GRAVEL AND COBBLE MATERIAL AVAILABLE ONSITE. THEENGINEER MUST APPROVE THE USE OF ALL ONSITE NATIVE MATERIAL. WHEN NATIVE SUBSTRATE IS NOTSUFFICIENT FOR COMPLETION OF THE STRUCTURE, QUARRIED STONE SHALL BE USED TO SUPPLEMENT THERIFFLE MATERIAL ACCORDING TO THE RIFFLE SUBSTRATE SPECIFICATIONS IN THE CONSTRUCTED RIFFLEDETEAIL. RIFFLE MATERIAL SHALL BE PLACED AT A UNIFORM THICKNESS SUCH THAT, IN CROSS-SECTION, ITSLOWEST ELEVATION OCCURS IN THE CENTER OF THE CHANNEL. RIFFLE MATERIAL SHALL BE COMPACTED USINGAN EXCAVATOR BUCKET SUCH THAT FUTURE SETTLEMENT OF THE MATERIAL IS KEPT TO A MINIMUM.6.CONSTRUCTED RIFFLE MATERIAL SHALL EXTEND A MINIMUM OF 10.0 FT U/S OF THE P.T. INTO THE GLIDE AND AMINIMUM OF 10.0 FT D/S OF THE P.C. INTO THE RUN.7.THE SURFACE OF THIS STRUCTURE SHALL BE FINISHED TO A SMOOTH AND COMPACT SURFACE INACCORDANCE WITH THE LINES, GRADES, AND CROSS-SECTIONS OR ELEVATIONS SHOWN ON THE DRAWINGS.THE DEGREE OF FINISH FOR INVERT ELEVATIONS SHALL BE WITHIN 0.1 FT OF THE GRADES AND ELEVATIONSINDICATED. RE-DRESSING OF CHANNEL AND BANKFULL BENCH/FLOODPLAIN WILL LIKELY BE REQUIREDFOLLOWING INSTALLATION OF IN-STREAM STRUCTURES AND SHALL BE CONSIDERED INCIDENTAL TOCONSTRUCTION.STREAMBEDGLIDERUNBOULDER STEPMICROPOOLBELOW STEPBOULDER STEPELV = 0.4' - 0.5'EXTEND BOULDER SILL INTOSTREAMBANK MIN 10.0' ORTHREE FULL BOULDER LENGTHSRIFFLE SUBSTRATEDEPTH MIN. = 2.0'30 - 40oRIFFLE SUBSTRATEDBKF = 1.2'BOULDER SILLEXTEND INTO STREAMBANK MIN 10.0'OR THREE FULL BOULDER LENGTHSOFFSET HEADERBOULDERS 1.0' U/SBANKFULLBOULDER STEPFLOWTOE OF SLOPEFLOWFLOWMOST DOWN STREAM STRUCTURE ATPC MAY BE BOULDER J-HOOK VANE ORBOULDER CROSSVANE PER PLAN AND DETAILSRIFFLE SUBSTRATEPER NOTESEXTEND RIFFLESUBSTRATE INTORUN MIN. 20.0 FTEXTEND RIFFLESUBSTRATE INTOGLIDE MIN. 40.0 FTSLOPE = 1 - 2%BOULDER CASCADE NOTESDETAILED PLANNOT TO SCALEDETAILED SECTION A - A'NOT TO SCALEDETAILED SECTION B - B'NOT TO SCALEB'BRIFFLE SLOPE VARIES PER PROFILEBANKFULLWBKF = 18.0'3:1 SIDE SLOPE14.0' - 16.0'WBOT = 12.0'1.2DETAIL: BOULDER CASCADENTSTHOMPSON RIVER AT SLUSHER FARM - BOULDER CASCADE
7 SAMUEL ASHE DRIVEASHEVILLE, NC 28805919.600.4790COA#: P-1932
TRANSYLVANIA COUNTY - NORTH CAROLINAPRELIMINARYDRAWINGSREVISIONSDATE: 30OCT20PLOT SIZE: 11" x 17"H.D.: NAD83V.D.: NAVD88JE PIN:
1.3REPRESENTATIVE PHOTOS: BOULDER CASCADENTSTHOMPSON RIVER AT SLUSHER FARM - BOULDER CASCADE
7 SAMUEL ASHE DRIVEASHEVILLE, NC 28805919.600.4790COA#: P-1932
TRANSYLVANIA COUNTY - NORTH CAROLINAPRELIMINARYDRAWINGSREVISIONSDATE: 30OCT20PLOT SIZE: 11" x 17"H.D.: NAD83V.D.: NAVD88JE PIN:KUYKENDALL CREEK - BREVARD, NCKUYKENDALL CREEK - BREVARD, NCCATHEYS CREEK - BREVARD, NCCATHES CREEK - BREVARD, NC