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Home My WebLink AboutSW4231202_Plansheet - SCM Detail_20240311 (5) POND N SP ECT ON /MAN TEN Ail CE SCHEDULE ( AS SHOWN IN OPERATION AND MAINTENANCE AGREEMENT) Inspection activities shall be performed as follows. Any problems that are found shall 3Do = 3(15) = 4.5' 3Do = 3(1.25') = 3.75' 3Do = 3(2.5') _ 7.5' 3Do = 3(1') = 3' be repaired immediately. = 1s'+16'=175 �w = 1.2s'+8'=9.2s� �w = 2s s�'+16'=18 �w = 1'+6'=�' 3 3 ° 3 ° 3 ° Outlet W = p + L j Outlet W = p + L Outlet W = p + L Outlet BMP element: Potential problem: How I w111 remediate the problem: pipe a 9 pipe a 9 pipe a g pipe W - °° + `a g The entire BMP Trash/debris is resent. Remove the trash/debris. diameter(DO) l I II j i diameter(Do) 1 i I Ill diameter(Do) 1 ; j ' diameter(Do) L 80 + La 80 La 80 La 80 The perimeter of the wet Areas of bare soil and/or Regrade the soil If necessary to lwater<D.SD° _ i T ,lwater<0.50° j T ,lwater<0.50° �T i T ,lwater<0.50° i �_ " �_ detention basin erosive [lies have formed. remove the gully, and then plant at° + -= I __ + _ I y� P La = 716t PQ La 8 <Pp eo II La = 16 r ,,PP 50 II La = 6 y PP 60 - ground cover and water until it is egtrot 60 _ r y ti a ° i �g� �5 `� V� 5 j 1� 4 \� 5 established. Provide lime and a �`\� { o a USE La - 8' \� ' I-i o a USE La = 16' USE La - 6' USE La = 16' i one-time fertilizer application. 4 y 4 4 - 4 4 a - a - a F _ a a I 1 I ffff4 rl 1.1 - ---d3gl , 323Vegetation is too short or too Maintain vegetation at a height ofis - - + 20 �5 3 20 15 IA ' J 3 20 15 rA' - 3 20 r 15 IA 3 long. approximately six inches. _ Z - _ 2 - _ Z 10 o D " 10 ONEn D/ " 1p ) n D/ " 1p n D/ _- -.I-. II I -- -__- J'C!Q ,i " � I BMP element: Potential problem: How I will remediate the problem: ,i I' I - fli N I --_ -- - N i- - - - N r -.- 'b N_ r - 'b N_ F r - - 'b N r - - - 'b N 2 CA _ _ „ 2 in The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the 2 j ° y D� 0. 1 y D a 2 a a m f a s m f a s m f a s m swale sediment off-site. -- J- a t III jli" y I-. _ it lil NI!,, yKIM The pipe is cracked or Replace the pipe. __ �5J=p 1 15"_ 1 a _ �� _ 1 a = 15�_ HIM M111111M1LID P p p p p I I v l l . I� , I F I I� I I I it _ l I; I I� I I I it _ ;; I� I I I it _ � ,� I ed. V-l0 d ! v-10 d a I v-10 d I v-10 d I t ot herwise dama 1. l l l v � I � I �. , � I. I. V I. � � I. V � I � i �, , ,� G I � �� I'. V� i .::: I I: '. l !I Erosion is occurring in the Regrade the swale if necessary to 3 5 10 20 50 100 200 500 1000 3 5 10 20 50 100 200 500 10)0 3 5 10 20 50 100 200 500 1000 3 5 10 20 50 100 200 500 1000 swale. smooth It over and provide erosion Discharge(0/sec) d50 = 0.55 (7") Discharge(0/sec) d50 = 0.25' (3") Discharge(ft3/sec) d50 = 0.5' (6") Discharge(0/sec) d50 = 0.2'(2.5") Control devices Such as reinforced USE CLASS B RIP RAP (00 = 8") USE CLASS B RIP RAP (00 = 8") USE CLASS B RIP RAP (00 = 8") USE CLASS B RIP RAP (00 = 8") CLASS B:dMAX = 12" CLASS B:dMAX = 12" CLASS B:dMAX= 12" CLASS B:dMAX= 12" Curves may not be extrapolated. THICKNESS = 1.5(12") = 18° Curves may not be extrapolated. THICKNESS = 1.5(12") = 18° Curves may not be extrapolated. THICKNESS = 1.5(12") = 18° Curves may not be extrapolated. THICKNESS = 1.5(12") = 18" turf matting or nprap to avoid - - Figure 8.06a Design of outlet protection protection from a round Figure 8.06a Design of outlet protection protection from a round Figure 8.06a Design of outlet protection protection from a round Figure 8.06a Design of outlet protection protection from a round 9 P P pipe flowing full,minimum tailwater condition(Tw<0.5 diameter). 9 P P pipe flowing Full,minimum tailwater condition(Tw<0.5 diameter). 9 P P pipe flowing Full,minimum tailwater condition(Tw<0.5 diameter). 9 P P pipe flowing Full,minimum tailwater condition(Tw<0.5 diameter), future problems with erosion. The forebay Sediment has accumulated to Search for the source of the RIP-RAP PAD AT 18" BARREL RIP-RAP PAD AT FES #1 RIP-RAP PAD AT FES #3 RIP-RAP PAD AT FES #32 a depth greater than the sediment and remedy the problem if BARREL FLOW = 17.24 CFS @ WS EL: 733.00, Do = 18" (15) DESIGN FLOW = 2.46 CFS, Do = 15" (1.25') DESIGN FLOW = 21.95 CFS, Do = 30" (2.5') DESIGN FLOW = 0.68 CFS, Do = 12" (1') original design depth for possible. Remove the sediment and sediment storage. dispose of it in a location where it will not cause impacts to streams or the BMP. 1 6 ' 8 ' 1 6 ' 6 ' Erosion has occurred. Provide additional erosion Ln L Ln protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on C LA S S B CLASS B CLASS B CLASS B the plants rather than spraying. 18 " CAP ;R PRAP 1 7 . 5 1 G' RCP ;R PRAP 9 . 2 5 3 G' RCP ;R PRAP 1 8 . 5 1 2 " RCP ;R PRAP 7 The vegetated shelf Best professional practices Prune according to best professional 18 " THICK 18 " THICK 18 " THICK 18 " THICK show that pruning is needed practices to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide aone-time R P - RAP PAD (a- R P - RAP PAD (a- R P - RAP PAD (a- R P - RAP PAD (a- ground application to establish the ground cover if a soil test indicates 18 " BARREL D ETA L FES # 1 FES # G FES # it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than s ra in . The main treatment area Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design sediment possible. Remove the sediment and storage depth. dispose of it in a location where it will not cause impacts to streams or the BMP. Lc Algal growth covers over Consult a professional to remove OUTLET PROTECT ON 50% of the area. and control the algal growth. W, Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray). E E S # SIZE E L 0 W(c f s ) Lc (f t) W, W2 Thickness (ft) RP - RAP the basin surface. 1 8 99 BMP element: Potential problem: How I will remediate the problem: PIPE RIPRAP WZ CLASS B BARREL 1 8 " 17 . 24 1 6 ' 4. 5 ' 1 7 . 5 ' 1 8 " CLASS B The embankment Shrubs have started to grow Remove shrubs immediately. 1 1 5 " 2 , 4 6 89 3 . 7 5 ' 9 , 2 5 ' 18 " CLASS B on the embankment. PROJECT TITLE: Evidence of muskrat or Use traps to remove muskrats and 3 30 " 21 . 95 1 6 7 . 5 ' 1 8 , 5 ' 18 " CLASS B THE TOWNES AT BERMUDA RUN beaver activity is present. consult a professional to remove PHASE 1 3 2 1 2 " 0 . 6 8 6 ' 3 ' 7 ' 1 8 " C, �AS S B DAVIE COUNTY FARMINGTON TOWNSHIP beavers. OWNER/DEVELOPER: BERMUDA RUN,NORTH CAROLINA HENSON REALTY, LLC A tree has started to grow on Consult a dam safety specialist to 249 DEARDOM WAY the embankment. remove the tree. D E TA E OUTLET P R O T E C T O �l G E O T E X T LE E �l E R TO BE CHAPEL HILL, NC 27516 336-707-9799 An annual inspection by an Make all needed repairs. . N-CARD` appropriate professional D E E PPE CHART ON SHEET C 4 . 1 _-+�_ ��n� �' FESS' ' shows that the embankment ngineering, Inc ,; needs repair. if applicable) F O R STORM PPE D E D G N E E O W S ��a�� y®� P��, 035014 •C1.. 3-! 1-29 The outlet device Clogging has occurred. Clean out the outlet device. Dispose Ph e 3 854-8877 F-336 85 8876 ;e •,F �;�• gig p � .NCI NE k of the sediment off-site. FIRM LICENSE#O,0168 PROJECT: 763-30 DESIGN BY: OF DRAWN BY: OF �� ♦ Theoutlet device is damaged Re air or replace the outlet device. H: 30 2019 P,,j..l,\Pool Mil.m\Bermuda Run\Drawing,\Ph...1\8.rm Run C. f,,�. PI.n.3.0_W.I.r,h.E 4.0- SHEET DESCRIPTION: The receiving water Erosion or other signs of Contact the local NC Division of WET DETENTION damage have occurred at the Water Quality Regional Office, or POND #2 DETAIL SCALE: N/A DATE: NOVEMBER 17, 2023 outlet. the 401 Oversight Unit at 919-733- REVISIONS: SHEET NO.. 1786. 3-„-24 C6.3