SW4231202_Plansheet - Misc. Detail_20231229 (2)

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(125') = 3.75' 3Do = 3(2.5') = 7.5' 3Do = 3(1') = 3'
be repaired immediately.
W = 1.5+16-17.5 W = 125'+8'=9.25' W = 2.5'+16'=18.5' W - 1'+6'=7'
' Outlet 3 ° + L Outlet 3 ° �I 3 ° �I 3 ° �I
W = D l ry W = D + L Outlet W = p + L Outlet W = p + L
CL
BMP element: Potential problem: How I will remediate the problem: pipe a 9 pipe a 9 pipe a 9 pipe a 9
I II j; l li II II II II II li II I
The entire BMP Trash/debris is resent. Remove the trash/debris. diameter(Do) 1 $° ,I I diameter(Do) 8D diameter(DO) 8D diameter(DO) 8D
La � i 1: La � i I La � I I La � i I
3 o all`l' 7 l _ ° 7 _ T i water<0.5D° T i water<0.5D°
The perimeter of the wet Areas of bare soil and/or Regrade the soil if necessary to
T i water<0.5D I _ T 1 water<O.SD I _ i i ' „ \,al`�l. 7 i
detention basin erosive gullies have formed. remove the ll , and then lant a to�`� 1 ( 7'" `°el�al - f La - 16' Pp` } i La - 6' A60b. y PLa = 16 �Pp 60 a L a - 8 Ppfi0 q � q
ground cover and water until it is e9 1 1 ti �g`r t
�e ve 1
Lit
ti {
established. Provide lime and a 5 _ -- ��`
- o t _ I I s - -
USE La = 16' q _ °_ a11 a USE La = 8' a \� _ o a 4 USE La - 16 q l 4 �, q USE La = 6' a { 4 �, 4
one-time fertilizer application. - it E1 F� V_
��
as J' 3 3 -
F1 nil
Vegetation is too short or too Maintain vegetation at a height of emu
8ion a roximatel six inches. 20 15 -14+1444
3 20 , 5 - 3 20 , �5 a 3 20 , 5 - a' 3
Z e = Z J Z _ 2
10 >, " 10 D " 10 D " 10NEW o D "
BMP element: Potential problem: How I will remediate the problem: �_ CD CD
'/ r
The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the a 2 a - 4 2 a 4 2 a - 4 2
LO
Swale sediment off-site. a -- a s n
�
The pipe is cracked or Replace the pipe. 15v= 1 a I� - 1 a 1 _
0 0
II l n g li: ,
is 4 99��4��
! �� f I°In I � 15JI I t I I� „ f iI I ( iI I � Ivin ,.. „ '' � 'iI �, , ;I 1 , � I ii h v=10 d it u I '!v=10 a ' S a jl, :,u 1v=10 a
5 a'
I
I N VMS, I I
lttlff
otherwise dama ed. ! -
v_5 7 ILTfli
i I, I _5 I I .,, I. v_5 I I I _5 :I ..., "I i I
I
Erosion is occurringin the Rerode the Swale if necessaryto T :I2 p ° II ° °
v 3 5 10 20 50 100 200 500 1000 3 5 10 20 50 100 200 500 1000 3 5 10 20 50 100 200 1000 3 5 10 20 50 100 200 500 1000
swale. smooth it over and provide erosion Discharge(ft3/sec) d50 - 0.55' (711) Discharge(ft3/sec) d50 = 0.25' (3") Discharge(ft3/sec) d50 - 0.5' (6") 500 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"
turf matting or riprap to avoid
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"
Figure 8.06a Design of outlet protection protection from a round pipe flowing full minimum tailwater condition T <0.5 d' Figure 8.06a Design of outlet protection protection from a round pipe flowing full minimum tailwater condition T <0.5 d'
Figure 8.06a Design of outlet protection protection from a round pipe flowing full,minimum tailwater condition(Tw<0.5 diameter). Figure 8.06a Design of outlet protection protection from a round pipe flowing full,minimum tailwater condition(Tw<0.5 diameter). p p g ( w diameter). p p g ( w 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 DESIGN FLOW = 17.24 CFS @ WS EL: 733.00, Do = 18" (15) DESIGN FLOW = 2.47 CFS, Do = 15" (1.25) DESIGN FLOW = 23.96 CFS, Do = 30" (2.5') DESIGN FLOW = 0.70 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 777
prevent future erosion problems.
Weeds are present. Remove the weeds, preferably by
hand. if pesticide is used, wipe it on � >
CLASS B CLASS B CLASS B CLASS
B
the plants rather than s ra in 1 8 " CAP ;R PRAP 175 1 5 " RCP ;R PRAP 9 , 25 30 " RCP ;R PRAP 1 8 . 5 1 2 " RCP ;R PRAP � 79
The vegetated shelf Best professional practices Prune according to best professional 1 8 " THICK 18 THICK 1 8 ' THCK _X_� 1 8 ' 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 fertilizer application to establish the R P - RAP PAD @ R P - RAP PAD @ R P - RAP PAD @ R P - RAP PAD @
ground cover if a soil test indicates 18 " BARREL D E TA L FES # 1 FES # 3 FES #
it is necessary.
Weeds are present. Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
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. L a
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 L0 W( c f s ) La (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 W2 CLASS B BARREL
1 8 " 15 . 87 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 . 0 0 8 ' 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 " 2 3 . 9 6 1 6 7 . 5 ' 185 18 " CLASS B THE TOWNES AT BERMUDA RUN
beaver activity is present. consult a professional to remove PHASE 1
3 2 1 2 " 0 . 7 0 6 ' 3 ' 7 ' 1 8 " C SAS 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 E E E �l E R T O B E CHAPEL HILL,NC 27516
336-707-9799
An annual inspection by an Make all needed repairs. .,• ca•�f*
appropriate professional STALLED UNDERNEATH
+ vans ss/ �
shows that the embankment
�
--t--
+ n�ineering9 Inc • � .
RIPRAP PADs A 11
needs repair. if applicable) I Engineers Surveyors Plananaers,-Since 1974- 1 035014
% ; i i /-23 ,c�:
The outlet device Clogging has occurred. Clean out the outlet device. Dispose Ph.ne336-8@8877 G��Fx33�854.8876 ; •,F
gig p .NCINE�• ti•
of the sediment off-site. A. Fti:�%
FIRM LICENSE#C,0168 �•
PROJECT: 763-30 DESIGN BY: DF DRAWN BY: DF �� o♦
Theoutlet device is damaged Repair or replace the outlet device. H:\CM1 30 2019 P,,l,ee\P-1 Mllam\8-du Run\growing.\Ph... 1\8---da Run C...-li-Plana 3.0-W.W.hed.d.,
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. C6.3

12"(30cm)
CHANNEL
4"(10an) INSTALLATION ` �` �� .00
`
; -6 v
.e
.�, -
(15cm) \�\\ 4" lOcm �:. ,
\� (15cm) ( ) 1 . Prepare soil before installing rolled
erosion control products (RECPs), =,_
including any necessary application of `. RollMax Product
5 lime, fertilizer, and seed. _ $ F ?, �.
14
2 � 2. Begin at the top of the channel by _
anchoring the RECPs in a 6"(15cm)
6" deep X 6"(15cm) wide trench with
approximately 12" 30cm of RECPs ,
(15cm) pp y ( >
2"-5" extended beyond the up-slope portion
W of the trench. Use ShoreMax mat at the - ,-
(5-12.Sam) channel/culvert outlet as supplemental
\\ scour protection as needed. Anchor the TEMPORARY TEMPORARY
\\\� RECPs with a row of staples/stakes Typical Slope Typical Slope Channel
Channel Product
4tt_6tt approximately 12"(30cm) apart
art in theDescription Application
\\ bottom of the trench. Backfill and Description
KV) Thresholds
(10 15cm) �v v compact the trench after stapling. Apply Accelerated Woven
\\\W W W seed to the compacted soil and fold the b' photodegradable, biodegradable
"s jute to and 2.35 psf
/ 11 polypropylene top 45 days 4:1 3:1 1.55 psf/5.0 fps 1 P P /10.0
„ 36 coo. 1:1 and Greater
e- \ © remaining 12 (30cm) portion of RECPs net,100%straw bottom net,100% fps
fiber matrix coconut fiber
back over the seed and compacted soil. DS75 c125BN matrix
W w W Secure RECPs over compacted soil Accelerated
\ ven
0% photodegradable, 700gwadab
with a row of staples/stakes spaced biodegradable
// \\ �� polypropylene 60 days 3:1-2:1 1.75 psf/6.0 fps coir top net,100%
® W // \ \\ W w approximately 12 apart across thePW top E bottom net, 2.35psf/10.0
coconut fiber 36+coo. 1:1 and Greater
Wldth Of the RECPS. 1D0%straw fiber matrix,woven fps
j A\j DS150 matrix biodegrdable jute
3. Roll center RECPs in direction of water C70OBN bottom net
W W % \ flow in bottom of channel. RECPS will photodegradable, PERMANENT
unroll with appropriate side against the polypropylene 12 months 4:1-3:1 lsspsf/S.0fps
net,100/o straw ERONET
soil surface. All RECPs must be fiber matrix
/ \\ securely fastened to soil surface by 575
UV-stable Unvegetated
\�\ placing staples/stakes In appropriate\\ Photodegradable, polypropylene 3.0psf/9.Ofps(PP)top and Permanent 1:1
/ polypropylene
locations as shown in the staple pattern
top o bottom net, 12 months 3:1 bottom net,100% Vegetated 2:1 1.75 psf/6.0 fps guide. 100%straw fiber PP fiber matrix 10 psf/16.0 fps
matrix P300=1 4. Place consecutive RECPs end-over-end S150
6 (Shingle y )
Shin le style) with a 4"-6" overlap. UV-stable Use vMAx
%
a double row of sta staples sta ered 4" polypropylene
(15cm) - / / p staggered top net,70/o UV-stable PP top
III= / apart and 4" on center to secure straw/30% &bottom nets,
Unvegetated
RECPs. coconut 24 months 2:1-1:1 2.0 psf/8.0 fps UV-stable PP 2.3 psf/8.5 fps
Permanent 1:1 and Greater
fiber matrix, crimped°center Vegetated
® 5. Full length edge of RECPs at top of side photodegradable net,100%straw 8 psf/18fps
Ok
slopes must be anchored with a row of polypropylene fiber matrix
SC150 bottom net 5200
staples/stakes approximately 12"(30cm) UV-stable PP
UV stable top 6 bottom
apart In a 6 (15cm) deep X 6 (15cm) polypropylene top nets,UV-stable
Unvegetated
2.25 psf/10.0
wide trench. Backfill and compact the P, &bottom nets, 36months 1:1 and Greater PP crimped 3.0 psf/9.5 fps
CRITICAL POINTS NOTES: p 100%coconut fps ° Permanent 1:1andGreater
trench after stapling. centernet,70%
fiber matrix straw/30% Vegetated
p g' 10 psf/15.0 fps
E125 coconut fiber
A. Overlaps and Seams *Horizontal staple spacing should be 6. Adjacent RECPS must be overlapped SC250 matrix
B. Projected Water Line altered if necessary to allow staples to approximately 211-511 (5-12.5cm) BIONET
UV-stable PP
C. Channel Bottom/Side Slope Vertices secure the critical points along the channel (Depending on RECPS type) and Leno woven top&bottom Unvegetated
stapled. nets,UV-stable 3.2 sf 1
surface. biodegradable p / O.Sfps
A A p jute top net, 12 months 4:1-3:1 1.6 psf/5.0 fps PP crimped Permanent 1:1 and Greater
7. In high flow channel applications a 100%straw fiber center net,100% Vegetated
matrix coconut fiber 12 psf/20fps
C350
C C **In loose soil conditions, the use of staple 575BN matrix
to 40 foot (9 -12m) intervals. Use a >_
or stake lengths greater than 6" 15cm may Woven UV-stable PP top
g g y double row of staples staggered biodegradable Unvegetated
II II jute to . / . U bottom nets,
be necessary to properly secure the 4 (10cm) apart and 4 (10cm) on center - j p and 12 months 3:1-2:1 185sf 60 fps p p UV-stable PP 4.Opsf/12.5fps
RECPs. over entire width of the channel. bottom straw fiber
net,10dcenter Permanent 1:1andGreater
Drawin Not To Scale straw fiber matrix net,100%PP fiber Vegetated
g 8. The terminal end of the RECPs must be S150BN P550 matrix 14 psf/25fps
anchored with a row of staples/stakes Woven
NORTH Disclaimer: approximately 12" (30cm) apart in a biodegradable Vegetated
jute top and 100%UV-stable
6"(15cm) deep X 6"(15cm) wide trench. P PPmonofilament TMax:16 psf
/
AMERICAN The information presented herein is general design information only. For specific applications bottom net, 18months 2:1 1;1 2.10psf/8.Of s
r 70%straw/30% Permanent 1:1 and Greater 25fps
Backfill and compact the trench after coconutfiber yarns,structure
GREEN' consult an independent professional for further design guidance. a3 Dstructure TMax20fpspsf/
Stapling. matrix TMAX/ 20 fps 3
5401 St. Wendel - Cynthiana Rd. PH: 800-722-2040 5C150BN TMAX31<
Poseyville, IN 47633 www.nagreen.com Drawn on: 5-4-17
32'
733.00
`�•J OQ�, A•J OQ�
Ln
C�AF 100-YR ELEVATION = 731 .92 �� F
17
DEPTH = 0.42' DEPTH = 0.13'
TOP OF TURF: 731 .50
20' WEIR SECTION 20 PROJECT TITLE:
GRASS LINED EMERGENCY SPILLWAY EXIT SECTION THE TOWNES AT BERMUDA RUN
W/ NORTH AMERICAN GREEN P550 GRASS LINED EMERGENCY SPILLWAY PHASE 1
TURF REINFORCEMENT MATTING DISCHARGE = 17. 95 CFS W/ NORTH AMERICAN GREEN P550 DARE MUARNTY RUN,NORTH
WNSHIP
4: 1 SIDE SLOPES BERMUDA RUN,NORTH CAROLINA
(OR APPROVED EQUAL) TURF REINFORCEMENT MATTING OWNER/DEVELOPER:
LC
BOTTOM WIDTH = 20' 4: 1 SIDE SLOPES (OR APPROVED EQUAL) 249DE REALTY, Y
249 DEARDOM WAY
FLOW DEPTH = 0. 42' 33. 33% SLOPE CHAPEL HILL,Nc27s16
336-707-9799
DISCHARGE = 17.95 CFS BOTTOM WIDTH = 20' 1 .0'N G_ARO
+E ya s
VELOCITY OVER WEIR LIP = 1 .97 HT/SEC n = 0. 030
+ ngnnaarnnge Inc • •
197-1-
FREEBOARD AND SETTLEMENT= 1 . 08' DEPTH = 0. 13' Engineers 5 anr sueveyors Planners 0350®r • 14
•CZ i i-i7-23 i�hi
�}6499 Dn¢ndas Drive Greensbv ,NC Z7407 •
Ph-e 336.854.8877 Fax [phone] � ,�; G+ �' � •
TOP OF DAM ELEVATION = 733. 00 VELOCITY= 6. 73 FT/SEC FIRM LICENSE#C,0168 i N
•��(.LT�".__�' ;•'
PROJECT: 763-30 DESIGN Y. DF DRAWN BY: DF ''+_� ����•
H:\CM1 30 2019 P,,1,es\Pau1 Milam\8-da Run\0r iaps\Phaes 1\8amaada Run Coas-i-Plans 3.0-Wafe hed.d,g
SHEET DESCRIPTION:
WET DETENTION
EMERGENCY SPLLWAY CONTROL SECT ON EMERGENCY SPLLWAY EMT SECT ON POND #2DETAIL
SCALE: N/A DATE: NOVEMBER 17, 2023
N TS N TS REVISIONS: SHEET NO.:
C6.4