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I d38d 03N18HOOM HION31 01.0 13A31 ) W (N) via nI13INI Woad 1 V ONA IVtl3a1SNM00 YIV3a1Sdn Ot0 3dOlS N1ON31 10 131N1 3SMOnalS 538~ kz'! ~/d 3ar~MSnoao~l sNrlsix3 na1S S380V oszf Y3db' 106't!1 7b101 NJISM N3(]V3NdS 13A31 ANdWWf1S 3 i JdNlb'ao Wa01S V1 VG 31 1 1 I / / / / ~ ~ ~ ti ~,I ~~1 J Y- Y` ~ ti~~Y_~ ~i ~ x- w' tir ~ f~ ~ i ~ ~r W ~ v - y'' _ ~ ~ ~ ~ PIPE OUTLET y ~ ~J 5 FT FES 1 Y~ ~ yII ~J v ~~Iy Y_ Yy >'V 1Y ~ V~ ~ ~ WEIR ELEVATION ~ ~ / I ~0.4' ABOVE 80TTOM TAKE RIP RAP TO - / TOE OF FILL SLOPE - ~ ~ vv- k~ DOWNSTREAM "LIP" M ~ ~ THE ENURE LENGTH Of SPREADERL y~ AS SHOW \ N ON PLANS ~-WASHED _ ~ SPREADER LIP MUST BE 1' _ } MINIMUM. ~ ~ ~ ~ 4 d ~ SEE PLANS FOR ELEVATION. E ~ ~ ~ STONE LOW FLARED END SECTION ' ~ ~ FILTER 2 FT ti - ~ Y~ RIP RAP l~ 1~ -Y~ y ' 2-3° SURGE STONE & _ _ _ _ =III-1il- DISSIPATOR PAD LEVEL g" pVC BOTTOM DRAIN iIPATOR PAD _ GEO-TEXTILE FABRIC -11=11-III=III-111=11111-Ill-III= _ ~ 1-I I I1=I I i-i i r--~ SPREADER I ii i _ ~ Y ELEV 4 ~ EXTEND A MINIMUM OE ONE h GRASS ~ I- ~ v ~ pT, ~ F001 PAST "LIP"-------~_ =11 RIP RAP OUTLET PROTECTION ~ 'i~ ~ ~ ~=1~ AND ENERGY DISSIPATOR ' STABILIZED SLOPE VIII- =III=1~ CROSS SECTION ~ ~ ~ _ ~I~II' SEE PLANS FOR DETAILS - ~ ti =III=' UNDISTURBED y ~ ~ II illl- GROUND y~~ ~ ITII v' v ~ WEIR r, ~ GRASS LINED CHANNEL STABt E UNDISTURBED P5 ~ 6" DEEP, 1' WIDE OUTLET AREA ~ G~ k~ ~ SEE PLANS F R RIP RAP . , ~dG 0 LENGTH AND ELEVATION ~ NOTE: EROSION CONTROL NETTING TO BE INSERTED c. i~'J~'v ~l 111 AN CUR I -y-~ ED N GRASS LIN D HANNEL ~ 7•,. ~ ~ J i4 Imo' : Y S.i~~At ~ ~ DETA IL OF LEVEL SPREADER CROSS SECTION. ~ FES ~ ' - IJ~ , `:j'~ J Y~ I v J ELEV f~ ~ P T ~Y ~ ~ ~ -~L.t; H„~;,~, 3 ELEVATION POINTS ,t~,, ON SPREADER ~ , ~ ~f ~k. , ALL AT SAME ELEVATION Vii`" FOREBAY _ ~ A ~ y~ Y Y~ ~ . r'"~ 6" PVC BOTTOM DRAIN ~ PT. SURGE STONE LIP ~ DISSIPATOR PAD I.EV pER S/REA CONSTRUCTION SPECIFICATIONS SPREADER IP -4.7" ORIFICE CAP L 1. THE MATTING SHOULD BE A MINIMUM OF 4 FEET WIDE EXTENDING 6 INCHES OVER THE LIP AND BURIED 6 INCHES DEEP IN A VERTICAL TRENCH ON THE LOWER EDGE. THE UPPER EDGE SHDULD CONSTRUCT THE LEVEL LIP ON UNDISTURBED SOIL TO UNIFORM HEIGHT AND ZERO GRADE 5' EARTH BERM BUTT AGAINST SMOOTHLY CUT SOD AND BE SECURELY HELD IN PLACE WITH CLOSELY SPACED OVER THE LENGTH OF THE SPREADER. PROTECT 1T WITH AN EROSION RESISTANT MATERIAL HEAVY DUTY WIRE STAPLES AT LEAST 12 INCHES LONC. SUCH AS SURGE STONE TO PREVENT EROSION. ~ 2. ENSURE THAT THE SPREADER IS LEVEL, FOR UNIFORM SPREADING OF STORM RUNOFF. OUTLET AREA ISOMETRIC VIEW 3, CONSTRUCT THE LEVEL SPREADER ON UNDISTURBED SOIL. NOT ON FILL ~ ) THE OUTLET DISPOSAL AREA MUST BE GENERALLY SMOOTH AND WELL VEGETAT 4. CONSTRUCT A 20 FOOT TRANSITION SECTION FROM THE DIVERSION CHANNEL Tp BL N MAXIMUM SLOPE OF 10%, ED WITH A WITH THE WIDTH AND DEPTH OF THE LEVEL SPREADER, E D SMOOTHLY 5. DISPERSE RUNOFF FROM THE SPREADER ACROSS A PROPERLY STABILIZED SLOPE, NOT TO EXCEED ~ GETATE A DISTIIRRF AR AS 107, MAKE SURE THAT THE SLDPE IS SUFFICIENTLY SMOOTH TO KEEP THE FLOW FROM CONCENTRATING. MAINTENANCE I 6. IMMEDIATELY AFTER IT'S CONSTRUCTION, APPROPRIATELY SEED AND MULCH THE ENTIRE DISTURBED AREA OF THE LEVEL SPREADER. INSPECT THE LEVEL SPREADER AFTER EVERY RAINFALL UNTIL VEGETATION 1S ESTABLISHED AND PROPERLY MAKE ANY NEEDED REPAIRS, AFTER THE AREA HA$ BEEN TA MAKE PERIODIC INSPECTIONS AND KEEP VEGETATION IN A HEALTHY, VIGOROUS CONDITID ON. I I PIPE DU, VqF,~ ~0 A JJJi ' A jJJJ~ILIJ.Y/J RIPRAP I TYPICAL CONC• FLARED ENO / y - SECTK)N ISOMETRIC VIEW A A _ - - - PLAN La v° W _p do IPE DIA La =APRON LENGTH W =APRON WIDTH 3 X PIPE M MIN d =APRON DEPTH PLAN ' -1 ' r~- ~ I II =L-ttf - - I I II III=1 I-I d - - mom- -T ~I _ I-I I I-jl-Il~_ ~ I-ICI u- _ _ - ~ ~ - -L~= - _ =1 - ~ -1- I I- _ II-I I-I~ ~ I I- I I- I I - - fi<iR- ~Il-i~f -1f~-~ .ll III I I ll- I -lll lll 1f SLOPE 0 ~ FLOW - -~,m~ f I ~_I=1 X11= I 1=III-1~-f I SECTION A-A filter blanket 1~=~f1-~-11--~11~ ~ _ =ll1=L= ~.4IE~.; _~~~;=.111-J11,=ll1- ~ I I -I~_~=ll n-Ill-In-III- SEE APPROPRIATE SCHEDULE FOR DIMENSIONS d SECTION A-A NOTES, 1. La is the length of the riprop apron, SEE APPROPRIATE SCHEDULE FOR DIMENSIONS Filter blanket 2. d = 1.5 times the maximum stone diameter but not less than 6" 1. La is the length of the riprop apron. 2. d = 1,5 times the maximum stone diameter but 3. Ih well-defined extend the apron up the c annel banks to on elevation of 6' above the not less than 6° maximum tailwater depth or to the to of the bank which ever is less. p 3. A filter blonkef or filter fabric should be installed between the riprop and soil foundation. 4. A filter blanket or filter fabric h s ould be installed between the riprop and soil foundation. PIPE OUTLET TO FLAT AREA - N 0 WELL DEFINED CHANNEL P IPE CULVERT OUTLET PROTEC TION FOR DEFINED CHANNEL CARP 000 ~ °~e `~SS~ ~ • '9 ~ • a • = o i •a si • 9•, ~ ~Pp ~ e,. ~v • C '@e 0IIIN1 - - - No. Date---- B Designer Scale Revision 1 WAKE COUNTY (S&EC) 1ST REVIEW 05/02/03 PMO W&R NTS Drawn By Date FAIRCROFT SUBDIVISION PHASE III EROSION PMIO 05/30/03 Checked By Job No, WAKE COUNTY NORTH CAROLINA ON CONTROL & DRAINAGE DETAILS WITHERS RAVENEL Sheet No. JEC 202161 ENGINEERS I PLANNERS I SURVEYORS - - 111 MacKenan Drive Cary, North Carolina 27511 tel: 919-469-3340 fax: 919-467-6008 www.withersravenef.com