SW6230502_Plansheet - SCM Detail_20231004

RIP-RAP PRE-TREATMENT REMOVABLE CAP
FOREBAY AT PIPE INLETS
(10 SEE DETAIL THIS SHEET 6' SCHEDULE 40 PVC, SOR35, OR SMOOTH WALL CORRUGATED
STORMWATER MANAGEMENT NOTES: TOP OF EMBANKMENT = 215.0 PLASTIC PIPE WTH 3/8' PERFORATIONS 0 6"ON CENTER (4
100-YEAR STORM ELEVATION = 214.43 \ \\\\ M /\/ / (LUSH VNili PAVEMENT IN HOLES PER ROW}
1. THE DEVELOPER OR HIS AGENT SHALL CONTACT THE DESIGN ENGINEER WHEN ////// ////// // // GRASS S00 \ \ \ \ \ \ \ \
10-YEAR STORM ELEVATION = 213.23 / / /\\/\\/\\/\\ \\ // //\//\//\//\ \ \ PERMEABLE PAVEMENT AREAS
THE BEST MANAGEMENT PRACTICE(S) ARE CONSTRUCTED AND ABOUT TO
BECOME OPERATIONAL SO A FINAL INSPECTION CAN BE PERFORMED TO SPILLWAY ELEVATION = 213.0 \\//\\//\\//\\//\\\\
\//\//\//\//\//\//\
DETERMINE COMPLIANCE WITH THE APPROVED PLAN CAN BE PERFORMED. /\\/\\/\\/\\/\\/\\\\ FILTER FABRIC AT BOTTOM AND SIDES OF CLEAN SANG ////\//\//\//\//\//\ °
2. ANNUAL MAINTENANCE INSPECTION AND REPORT REQUIRED - THE OWNER Of 2-YEAR STORM ELEVATION = 211.31 o%\\//�\//�\//�\//�
A PERMITTED STRUCTURAL STORMWATER BMP/CONTROL SHALL ANNUALLY
SUBMIT A MAINTENANCE AND INSPECTION REPORT FOR EACH BMP TO THE ///�//�//�//�//�//�//��i�%\ \ V-0" CLEAN SANG / \\j °o°
1-YEAR STORM ELEVATION \\\\\\ \\ \\\\\\ \\\\\\ \ 10�� // ////// ////// // o 0
STORMWATER ADMINISTRATOR. ANNUAL INSPECTIONS SHALL BEGIN WITHIN / //// ////// // ////// \ `\\ \\ \\\\\\ \\\\ \
ONE YEAR OF THE RECORDATION OF ANY S SHOWING STORMWATER \\\\\\\\\\\\\\\\\\\\\\\\\ /�3� '//`//j//j//j//j//j//j//j// o° N
1.0' RAINFALL ELEVATION = 208.15 \//\//\//\//\///\//\//\//\//\ \ / /\i %\%\%\\/\%\%\%\% INFILTRATION o o o w
\ \ \ \ \ \ \ \
BMP9/CONTROL STRUCTURES SAND MEDIA o Q
EXISTING GRADE = 208.0 BOTTOM OF BASIN = 20&0 \//\\''\\//\\//\\//\\ \\\\\\ \\ W �ad�// //\\//\\//\\//\\//\\//\\//\\//\\/\\ coo >
3. UPON COMPLETION OF THE PROJECT, AND BEFORE A CERTIFICATE Of \//\/%\�/%\�/ / / / / /%\\\� ////\\%\j\\%\%\ \\%\%\ \\/ 0.0
t__
OCCUPANCY SHALL BE GRANTED, THE ENGINEER Of RECORD SHALL CERTIFY FILTER MIXTURE o°o
THAT THE COMPLETED PROJECT IS IN ACCORDANCE WITH THE APPROVED \ \\\ o
STORMWATER MANAGEMENT PLANS AND DESIGNS. 1'-0" OF CLEAN ASTM C-33 \/\\\\\jj\jj\\jj\jj\jj\\ ///\�//\�//\�/��/ / / / // o°o
4. A FINAL INSPECTION OF THE SITE AND STORMWATER MANAGEMENT SAND (MEDIUM AGGREGATE SAND °
BMP/CONTROLS TO BE SCHEDULED WITH AND COMPLETED BY THE PROJECT WITH A SIZE RANGE OF OA2-INCH o 'o'
ENGINEER. TO 0.04-INCH DIAMETER) °°°
5. NCDEQ AND THEIR ASSIGNS HAVE RIGHT TO ACCESS THE STORMWATER CL W UNDISTURBED SUBSOIL
CONTROL(s) FOR INSPECTIONS OR MAINTENANCE AS NECESSARY. Uj
o LAYER OF GEOTEXTILE PERMEABLE r„ INSERT 4"-6" INTO
a FILTER FABRIC (MIRAFI N-SERIES IN-SITU SOIL BASE OBSERVATION WELL
6. THE ENGINEER'S CERTIFICATION OF COMPLETION WILL BE REQUIRED PRIOR TO OR EQUIVALENT) _ ? FILTER FABRIC
THE FINAL PLAT OR CERTIFICATE OF OCCUPANCY. THE STORMWATER ® o SCALE: N.T.S.
CONTROL IS TO BE INSPECTED TO ENSURE IT IS FUNCTIONING AS DESIGNED V-0" MIN. UNDISTURBED IN-SITU �
AND HAS FULL DESIGN VOLUME PRIOR TO ISSUANCE Of THE FINAL SOIL
CERTIFICATE OF OCCUPANCY. S2 m
z r8�
7. THE PROPERTY OWNER IS RESPONSIBLE FOR MAINTAINING THE STORMWATER Z z
CONTROLS(s) ACCORDING TO THE APPROVED MAINTENANCE PLAN AND
DIRECTION OF NCOEQ. C STORM DRAINAGE PIPE OR
CONCRETE FLUME
OUTFALL INTO POND LENGTH dt WIDTH
SEASONAL HIGH WATER TABLE = 196.0 DIMENSIONS TO BE PE
RIP-RAP
APRON DETAIL FILTER BED ELEVATION
BIO-RETENTION POND
INFILTRATION BASIN TYPICAL SECTION -._- ---,- -; TAPER DEPTH
•-11
CDNT5 _ _ = FOREBAY 1' - ro Q n ca
I II El I� I- 2' 000<o000000000000000 o c ❑ cn U
�✓ \--� I� II II-11 -1 ;o�o�o�o�o�o�o�o�<g��,�� H N co C)
LLI
=11-I I� I� -i r- i� I� I-III=1I I1=1I1=1I Z M C
-11 I-III-I I-III-I III-I Q = rn E
Z p7 C� z
LO o
0 J C C
OPERATION & MAINTENANCE PROVISIONS (INFILTRATION} RIP RAP OVER
GRASS SOD NOTE: RIP-RAP FOREBAY FILTER FABRIC o
BMP element: Potentialproblem: How to remediate the problem SCALE: N.T.S. m m
e entire infiltration bash Trash/debris is present Remove the trash/debris GRASS SOD SHALL BE EITHER HYBRID BERMUDA GRASS OR CENTIPEDE THAT HAS BEEN GROWN IN A
SOIL THAT IS FREE OF AN IMPERMEABLE LAYER (SUCH AS CLAY).
e gross filter strip or other pretreatment Areas of bare soil and/or erosive gullies Regrode the soil if necessary to remove
area have formed the gully, plant ground cover and water NOTES:
until established. Provide lime and a 1. ALL INFILTRATION BASINS SHALL HAVE AN ACCESS EASEMENT CONNECTING TO A DEDICATED PUBLIC RIGHT Of WAY.
one-time fertilizer application
2. ALL DRAINAGE AREAS TO AN INFILTRATION BASIN ARE TO BE STABILIZED PRIOR TO INSTALLATION OF SOILS OR GRASS SOD.
Sediment has accumulated to a depth Search for the source of the sediment and LTER MEDIA(SEE NOTE 2) f n
greater than three inches remedy the problem if possible. Remove 3. THE DRAINAGE AREA OF THE INFILTRATION BASIN WILL BE CAREFULLY MANAGED TO REDUCE THE SEDIMENT LOAD TO THE SAND FILTER MID �J J ()
the sediment and dispose of it in a SYSTEM. SILT FENCE AS NEEDED J z
location where it will not cause impacts 4. THE WATER LEVEL IN THE MONITORING WELL(S) WILL BE RECORDED ONCE A MONTH AND AFTER EVERY STORM EVENT GREATER THAN 1.5 �� Q
FLOW
to streams a the SCM INCHES.
e flow diversion structure (if applicable) The structure is dogged Unclog the conveyance and dispose of any 5. IMMEDIATELY AFTER THE INFILTRATION BASIN IS ESTABLISHED, THE VEGETATION WILL BE WATERED TWICE WEEKLY If NEEDED UNTIL PLANTS - w z
sediment in a location where it will not BECOME ESTABLISHED (COMMONLY SIX WEEKS) �07Y C) ❑
cause impacts to streams or the SCM O
6. NO PORTION Of THE INFILTRATION BASIN WILL BE FERTILIZED AFTER THE INITIAL FERTILIZATION THAT IS REQUIRED TO ESTABLISH THE
The structure is damaged Make any necessary repairs or replace if VEGETATION. NOTES-
The ATER LEVEL U
damage is too much for repairz
7. THE VEGETATION IN AND AROUND THE BASIN WILL BE MAINTAINED AT A HEIGHT OF APPROXIMATELY SIX INCHES.
inlet device The inlet i is d if a licable Und the i e and dis dispose of an 1. PRIOR TO INSTALLATION, MANUFACTURER SPECIFICATIONS OF FILTER MEDIA SHALL BE REVIEWED TO L'�"I I� W
P ( applicable) pipe p y ENSURE THAT DISCHARGE FROM FILTER MEDIA SHALL MEET OR EXCEED THE PROVISIONS OF THE CLEAN 5
sediment in a location where it will not WATER ACT Q z
.
cause impacts to streams or the SCM w IY
2. ENSURE THAT PUMP PRESSURE DOES NOT EXCEED FILTER MEDIA PRESSURE RATING. r _
The inlet pipe is cracked or otherwise Repair or replace the pipe Q
damaged (if applicable) 3. FILTER MEDIA MAY BE, BUT NOT LIMITED TO, SAND MEDIA FILTRATION DEVICES, RATED FILTER FABRIC
BAGS OR POLYMER BASED DEWATERING PRACTICES ' 1 rz
Erosion is occurring in the swde Regrade the swale if necessary and 4. PUMP STRAINER SHALL NOT BE IN CONTACT WITH BOTTOM OF POND. Q 1�
(if applicable) provide erosion control devices such as
reinforced turf matting or rip-rap to avoid V 1
future erosion problems
_ BMP POND DEWATERING Low POINT � � Z
Stone verge is dogged or covered in Remove sediment and clogged stone and f _3sediment (if applicable) replace with dean stone J
/ / \ J ' ♦ / / /' / / I W
e basin More than four inches of sediment has Search for the source of the sediment and
accumulated remedy the problem if possible. Remove
the sediment and dispose of it in a ( J / - ♦ / // / / // �/ // f / / O
location where it will not cause impacts / / / �� / �0 / / / , / / / / / / FLOW *LONG TOP OF EMBANKMENT CC
cc
to streams or the SCM / r �� / INLET PIPE WITH 0000, r/ '- / / / / SPILLWAY 100 SLOPE % H 8 W SS CHANNEL LINING ELEVATION SPILLWAY ELEVATION G
Erosion of the bash surface has occurred Provide additional erosion protection such ) / v /( ?♦ RIP-RAP APRON /� ( / / / / V
or riprop is displaced as reinforced turf mattingor ri r if / / ( DESIGNED BY / / \ / / / INFILTRATION STRAW WITH NET NAG
P°p / --�, ( / / 89.36 CFS 33.33/0 2.0' 20.0' 32.0' 3:1 215.0 213.0 O 0
needed to prevent future erosion problems ♦ / OTHERS � / / / / SPILLWAY SHOREMAX W/ P550Ir
Water is standing more than three days Replace the top few inches of soil to see / J / / / / - i �( / / / / Q
after a storm event / / - ✓ 'LONGITUDINAL SLOPE - W
if this corrects the standing water problem. / / ♦ �� / / / EXTEND LINING TO ❑
If not, consult an appropriate professional / i/ / / ° / / f / 3:1 BACK SLOPE FROM EMBANKMENT EXTEND LINING TO
TOP OF SPILLWAY
� / ♦ � ,�- r -� / TOP OF SPILLWAY TOP OF EMBANKMENT=215.0
for a more extensive repair J / ♦ f j �^ / �' / \ OBSERVATION
e embankment Shrubs or trees are growing on the Remove trees and shrubs immediately 7 l r `� ~ / / ,0 / / / WELL (TYP.)
embankment / / / / / /��, J / - - �� - H CHANNEL LINING
J ♦ // /00 ti 9 / SPILLWAY ELEVATION=213.0
An annual inspection by an appropriate Make needed repairs immediately i / / // - / / i;'. MATTING SHALL BE AS NOTED
professional shows that the embankment r / / / / F / // \ // GRASS SPILLWAY
needs repair ,/ / J L \ / / j ° / / �...R. REFER TO DETAIL �, oR APPROVED EQUAL. B
e outlet device Bogging has occurred Bean out the outlet device and dispose of /J f ) ( / / / ° / THIS SHEET GRASS SPILLWAY DETAIL GRASS SOD ON SPILLWAY
sediment h a location where it will not ` AND SIDE SLOPES
cause impacts to streams or the SCM ' / / / ° / / /
The outlet device is damaged Repair or replace the outlet device STAGE/STORAGE TABLE ` )N
/ / \ STORMWATER � 175o !
e receiving water Erosion or other signs of damage have Repair the damage and improve the flow ♦h MANAGEMENT I / CONTOUR AREA INCREMENTAL TOTAL STORAGE
9 eP 9 P ( \ / ' �9�7
TOP OF / / / STAGE(FT) ELEVATION (FT}
occurred at the outlet dissipation structure / \ \ ! / (SF) STORAGE (CF) (CF) W jq Ki.\ 1 EASEMENT \ // -EMBANKMENT / / =
0.0 208.0 9970 0 0
Discharges from the infiltration trench are Contact the local NCDEQ Regional Office i ) /// / ELEV=215.0 / / 1.0 209.0 11225 10598 10598 w
causingerosion or sedimentation h the RIP RAP DISSIPATER
receivig water \ I O PAD #10 + \ k ( - - i/ - / / / 2.0 210.0 12535 11880 22478
I ( \ 1 (� _ �� \ .►_/ / / / 3.0 211.0 13905 13220 35698 * _
\ WIDTH-9, \ / - -\� 4.0 212.0 15330 14618 50315
( ) I LENGTH=11�� fl t, I I I- �/ _i / , / / 5.0 213.0 16815 16073 66388 (WQV)
OPERATION AND MAINTENANCE. \ \ I t THICKNESS=18 f r✓ / j I / V / / / 6.0 214.0 18350 17583 83970
I I RIP RAP CLASS=B I ( I ( / _ /- / / L / 7.0 215.0 19945 19148 103118
North Carolina storm water rules require quarterly inspections by the regulating agency of infiltration areas as a minimum. More I ` I ` ) ) `r , ( / �/ /
frequent inspections by the land owner or system operator are strongly encouraged to ensure the proper operation of infiltration
areas.
A. Rainfall Event (STORMWATER MANAGEMENT DESIGN INFILTRATION SYSTEM #1:
1. Inspect the basin after every rainfall event greater than 1.5 inches. GRAPHIC SCALE PLAN STATUS
B. Monthly Inspection RIVER BASIN: CAPE FEAR 01/25/23 INITIAL SUBMISSION
1. Inspect the basin monthly 50 a 25 50 100 200 RECEIVING STREAM: UPPER LITTLE RIVER
2. Check the infiltration area side slopes; remove trash and repair eroded areas before the next rainfall event. STREAM INDEX: 18-20-(8) 05/16/23 2ND SUBMISSION
3. Check the vegetative and rock filters for sediment accumulation, erosion and proper operation of the flow spreader STREAM CLASS: C 07/05/23 3RD SUBMISSION
mechanism and repair as necessary. PLAN VIEW HUC: 0303000402
C. Quarterly Inspection ( IN FEET ) PROJECT COORDINATES: 35.316452'N, -78.919260'W
1. Inspect the collection system (i.e. catch basin, pipes and grass swales) for proper functioning. Clear accumulated 1 inch = 50 ft.
trash from basin grates and basin bottoms. Check piping for obstructions. POND DESIGN SUMMARY
2. Check pond inlet pipes for undercutting, replace rip-rap and repair broken pipes. DRAINAGE AREA TO POND: 12.96 ACRES DATE DESCRIPTION
3. Reseed grassed swales, including the vegetated filter if applicable, twice a year as necessary. Repair eroded areas SITE IMPERVIOUS AREA TO POND: 2.88 ACRES
immediately. OFF-SITE DESIGN IMPERVIOUS AREA TO POND: 0.0 ACRES CB CB CEP
D. Six Month Inspection TOTAL DESIGN IMPERVIOUS AREA TO POND: 2.88 ACRES DESIGN DRAWN CHKD
1. Remove accumulated sediment from the bottom of the outlet structure or other areas where accumulated sediment PRE-DEVELOPED POST-DEVELOPED POST DEVELOPED H: 1" = 50'
is noted. STORMWATER MANAGEMENT SYSTEM DETAILS SCALE
2. Inspect the embankment taking note of any wet areas where water may be seeping through the soil. 1 TO POND TO POND THROUGH POND V:
E. General Inspection NOT TO SCALE DRAINAGE AREA: 6.77 AC 12.96 AC
1. Maximum grass height is to be 6in. CURVE NUMBER: 73.7 79.3 OB No. 220164-01-002
2. No woody vegetation shall be allowed to grow in the infiltration area. TIME OF CONCENTRATION: 20.5 MIN 5.0 MIN
3. Debris shall be removed from blocking the inlet and outlet structures and from areas of potential clogging. DATE JANUARY 25, 2023
4. Periodic removal of dead vegetation shall be accomplished. 1.0" STORM EVENT: 0.282 CFS 0.000 CFS
5. All components of the infiltration system must be kept in good working order. 1-YEAR STORM EVENT: 6.231 CFS 27.39 CFS 0.000 CFS FILE No.
2-YEAR STORM EVENT: 9.506 CFS 38.13 CFS 0.000 CFS
10-YEAR STORM EVENT: 19.52 CFS 69.90 CFS 5.687 CFS
100-YEAR STORM EVENT: 37.27 CFS 122.71 CFS 89.36 CFS SHEET SCM-1
Cad file name: V:\220164 - Stonegate\220164-01-002 (ENG) - Ducks Landing - Darroch Road\Engineering\Engineering Plans\Construction Plans\048-030-SWD.dwg

RIP-RAP PRE-TREATMENT REMOVABLE CAP
FOREBAY AT PIPE INLETS
SEE DETAIL THIS SHEET fi" SCHEDULE 40 PVC, SOR35, OR SMOOTH WALL CORRUGATED
STORMWATER MANAGEMENT NOTES: TOP OF EMBANKMENT = 203.0 PLASTIC PIPE WITH 3/8" PERFORATIONS 0 6"ON CENTER (4
100-YEAR STORM ELEVATION = 202.39 \ \\\\ M /\/ / FLUSH WITH PAVEMENT IN HOLES PER ROW)
1. THE DEVELOPER OR HIS AGENT SHALL CONTACT THE DESIGN ENGINEER WHEN ////// ////// // // GRASS S00 \ \ \ \ \ \ \ \
10-YEAR STORM ELEVATION = 201.18 // //\//\//\//\ \ \ PERMEABLE PAVEMENT AREAS
THE BEST MANAGEMENT PRACTICE(S) ARE CONSTRUCTED AND ABOUT TO
BECOME OPERATIONAL SO A FINAL INSPECTION CAN BE PERFORMED TO SPILLWAY ELEVATION = 201.0
\//\//\//\//\//\//\ FILTER FABRIC AT BOTTOM
DETERMINE COMPLIANCE WITH THE APPROVED PLAN CAN BE PERFORMED. /\\/\\/\\/\\/\\/\\\\ AND SIDES OF CLEAN SANG //// °
\/\/\/\) /\/\/\/\/
/ ////// //////JJ• i \\\\ \\ \\\\\\ \ °o o
2. ANNUAL MAINTENANCE INSPECTION AND REPORT REQUIRED THE OWNER Of 2-YEAR STORM ELEVATION = 199.14 \ o coo z
A PERMITTED STRUCTURAL STORMWATER BMP/CONTROL SHALL ANNUALLY ////// // // o
SUBMIT A MAINTENANCE AND INSPECTION REPORT FOR EACH BMP TO THE ///�//�//�//�//�//�//��i�%\ \ V-0" CLEAN SAND / \\/\\j\\j\\j\\j\\j \ coo° N
1-YEAR STORM ELEVATION = 198.15 \\\\\\ \\ \\\\\\ \\\\\\ \ // ////// ////// // coax
STORMWATER ADMINISTRATOR. ANNUAL INSPECTIONS SHALL BEGIN WITHIN / //// ////// // ////// \� `\\ \\ \\\\\\ \\\\ \
ONE YEAR OF THE RECORDATION OF ANY S SHOIilNG STORMWATER N
1.0" RAINFALL ELEVATION = 196.15 \//\//\//\//\///\//\//\//\//\ \ / /\i %\%\%\\/\%\%\%\% INFILTRATION °o o w
\ \ \ \ \ \ \ \
BMP9/CONTROL STRUCTURES \// SAND MEDIA o Q
EXISTING GRADE = 196.0 BOTTOM OF BASIN = 196.0 \\\ \\ \\\\\\ \\\\\\ \\ W �ad�// //\\//\\//\\//\\//\\//\\//\\//\\/\\ o o >
3. UPON COMPLETION OF THE PROJECT, AND BEFORE A CERTIFICATE Of \/ \� /\\/ coo
0
OCCUPANCY SHALL BE GRANTED, THE ENGINEER Of RECORD SHALL CERTIFY FILTER MIXTURE (rwou' \�/�\/�\/�\/�\/�\/�\/�\/�\ %\ \ \ \ \ \%/ o°o
THAT THE COMPLETED PROJECT IS IN ACCORDANCE WITH THE APPROVED \\//\\//\\//\\//\\//\\//\\//\\ //\\//\\//\\//\\//\\//\\//\\//\\//\ o
STORMWATER MANAGEMENT PLANS AND DESIGNS. 1'-0" OF CLEAN ASTM C-33 °o
4. A FINAL INSPECTION OF THE SITE AND STORMWATER MANAGEMENT SAND (MEDIUM AGGREGATE SAND °
BMP/CONTROLS TO BE SCHEDULED WITH AND COMPLETED BY THE PROJECT WITH A SIZE RANGE OF 0.02-INCH o 'o o
ENGINEER. TO 0.04-INCH DIAMETER) °°°
5. NCDEQ AND THEIR ASSIGNS HAVE RIGHT TO ACCESS THE STORMWATER CL Uj
W UNDISTURBED SUBSOIL
CONTROL(s) FOR INSPECTIONS OR MAINTENANCE AS NECESSARY. o LAYER OF GEOTEXTILE PERMEABLE r„ INSERT 4"-6" INTO
a FILTER FABRIC (MIRAFI N-SERIES IN-SITU SOIL BASE OBSERVATION WELL
6. THE ENGINEER'S CERTIFICATION OF COMPLETION WILL BE REQUIRED PRIOR TO c4 OR EQUIVALENT) _ ? FILTER FABRIC
THE FINAL PLAT OR CERTIFICATE OF OCCUPANCY. THE STORMWATER ® o SCALE: N.T.S.
CONTROL IS TO BE INSPECTED TO ENSURE IT IS FUNCTIONING AS DESIGNED V-0" MIN. UNDISTURBED IN-SITU c
AND HAS FULL DESIGN VOLUME PRIOR TO ISSUANCE Of THE FINAL SOIL
CERTIFICATE OF OCCUPANCY. S2 m
z r8�
7. THE PROPERTY OWNER IS RESPONSIBLE FOR MAINTAINING THE STORMWATER Z z
CONTROLS(s) ACCORDING TO THE APPROVED MAINTENANCE PLAN AND
DIRECTION OF NCOEQ. STORM DRAINAGE PIPE OR
CONCRETE FLUME
OUTFALL INTO POND LENGTH & WIDTH
IF SEASONAL HIGH WATER TABLE = 184.0 DIMENSIONS TO BE PER
RIP-RAP
APRON DETAIL FILTER BED ELEVATION
V
BIO-RETENTION POND
INFILTRATION BASIN TYPICAL SECTION -._- ---,- -; TAPER DEPTH
•-11 I��I�I I=11 I=11 I�I I�I I=1�� � �
FOREBAY 1' - ro Cc Q CDr- ca
2' 0
oo<.00000000000000000 c ❑ cn U
11 IN I I-I Ii 11 1 -1 ;o�o�o�o�o�o�o�o�<g��,�� H � N c�
=11-I I� I� -i r- i� I� I-III=1I I1=1I 1=1I Z o)
-11 I-III-I I-III-I III-I Q = rn E
z p7 C� z
o
0 J C C
OPERATION & MAINTENANCE PROVISIONS (INFILTRATION} RIP RAP OVER
GRASS SOD NOTE: RIP-RAP FOREBAY FILTER FABRIC 0-
o
BMP element: Potentialproblem: How to remediate the problem SCALE: N.T.S. m m
e entire infiltration bash Trash/debris is present Remove the trash/debris GRASS SOD SHALL BE EITHER HYBRID BERMUDA GRASS OR CENTIPEDE THAT HAS BEEN GROWN IN A
SOIL THAT IS FREE OF AN IMPERMEABLE LAYER (SUCH AS CLAY).
e gross filter strip or other pretreatment Areas of bare soil and/or erosive gullies Regrode the soil if necessary to remove
area have formed the gully, plant ground cover and water NOTES:
until established. Provide lime and a 1. ALL INFILTRATION BASINS SHALL HAVE AN ACCESS EASEMENT CONNECTING TO A DEDICATED PUBLIC RIGHT Of WAY.
one-time fertilizer application
2. ALL DRAINAGE AREAS TO AN INFILTRATION BASIN ARE TO BE STABILIZED PRIOR TO INSTALLATION OF SOILS OR GRASS SOD.
Sediment has accumulated to a depth Search for the source of the sediment and LTER MEDIA(SEE NOTE 2) f n
greater than three inches remedy the problem if possible. Remove 3. THE DRAINAGE AREA OF THE INFILTRATION BASIN WILL BE CAREFULLY MANAGED TO REDUCE THE SEDIMENT LOAD TO THE SAND FILTER MP �J J C)the sediment and dispose of it in a SYSTEM. SILT FENCE AS NEEDED J Z
location where it will not cause impacts 4. THE WATER LEVEL IN THE MONITORING WELL(S) WILL BE RECORDED ONCE A MONTH AND AFTER EVERY STORM EVENT GREATER THAN 1.5 �� Q
FLOW
to streams a the SCM INCHES.
e flow diversion structure (if applicable) The structure is dogged Unclog the conveyance and dispose of any 5. IMMEDIATELY AFTER THE INFILTRATION BASIN IS ESTABLISHED, THE VEGETATION WILL BE WATERED TWICE WEEKLY If NEEDED UNTIL PLANTS - w Z
sediment in a location where it will not BECOME ESTABLISHED (COMMONLY SIX WEEKS) �07Y C) ❑
cause impacts to streams or the SCM O
6. NO PORTION Of THE INFILTRATION BASIN WILL BE FERTILIZED AFTER THE INITIAL FERTILIZATION THAT IS REQUIRED TO ESTABLISH THE
The structure is damaged Make any necessary repairs or replace if VEGETATION. NOTES-
The ATER LEVEL U
damage is too much for repairz
7. THE VEGETATION IN AND AROUND THE BASIN WILL BE MAINTAINED AT A HEIGHT OF APPROXIMATELY SIX INCHES.
inlet device The inlet i is d if a licable Und the i e and dis dispose of an 1. PRIOR TO INSTALLATION, MANUFACTURER SPECIFICATIONS OF FILTER MEDIA SHALL BE REVIEWED TO L'�"I I� W
P ( applicable) pipe p y ENSURE THAT DISCHARGE FROM FILTER MEDIA SHALL MEET OR EXCEED THE PROVISIONS OF THE CLEAN 5
sediment in a location where it will not WATER ACT Q z
.
cause impacts to streams or the SCM w IIr
2. ENSURE THAT PUMP PRESSURE DOES NOT EXCEED FILTER MEDIA PRESSURE RATING. r _
The inlet pipe is cracked or otherwise Repair or replace the pipe Q
damaged (if applicable) 3. FILTER MEDIA MAY BE, BUT NOT LIMITED TO, SAND MEDIA FILTRATION DEMCES, RATED FILTER FABRIC
BAGS OR POLYMER BASED DEWATERING PRACTICES. 7 z
Erosion is occurring in the swale Regrade the swale if necessary and 4. PUMP STRAINER SHALL NOT BE IN CONTACT WITH BOTTOM OF POND.
(if applicable) provide erosion control devices such as �� T�
AL
reinforced turf matting or rip-rap to avoid V 1
future erosion problems
BMP POND DEWATERING LOW POINT Z
Stone verge is dogged or covered in Remove sediment and clogged stone and r J / 1 / I l I \ �\ \ y� \ 1\ w J
sediment (if applicable) replace with dean stone J /
e basin More than four inches of sediment has Search for the source of the sediment and
accumulated remedy the problem if possible. Remove / �` Q
the sediment and dispose of it in / / l /
location where it will not cause impacts / / / \ \ \ \ t- / \ ` FLOW *LONG
to streams or the SCM J / I \\ \ \ \ \ 1 TOP OF EMBANKMENT
/ / I ) \ // \\ 1 ` ``\\_ \, _ \\ ` SPILLWAY Q(100 SLOPE % H B W SS CHANNEL LINING SPILLWAY ELEVATION
\ � \ ) O ELEVATION =
Erosion of the bash surface has occurred Provide additional erosion protection such ) \ -��L INFILTRATION STRAW WITH NET NAG O V
or riprop is displaced as reinforced turf matting or riprap if 1 ( J \ / / \ ` '\ ` \ �W \ e:-� / 84.98 CFS 33.33% 2.0 20.0 32.0 3:1 203.0 201.0 0
needed to prevent future erosion problems l L� S \ \ \ �\� SPILLWAY SHOREMAX W/ P554 F- Ir
\ \ \ f�
Water is standing more than three days Replace the top few fiches of soil to see JI STORMWATER \\\ �- - ` I \ � \\ \ I \ \\\ \v 1, \� J Q
after a storm event if this corrects the standingwater problem. MANAGEMENT 7 I \ i \ W� W 3.1*LO BACK
SILONAL SLOPE - W
P ` EXTEND LINING TO ❑
If not, consult an appropriate professional EASEMENT / \ v v 3:1 BACK SLOPE FROM EMBANKMENT TOP Of SPILLWAY EXTEND LINING TO
/ � I � � o � TOP OF SPILLWAY TOP OF EMBANKMENT=203.0
for a more extensive repair \\ ✓1 1 I I \ OBSERVATION )\ �\ \ \\\
e embankment Shrubs or trees are growing on the Remove trees and shrubs immediately f ° ) ` WELL (TYP•) 1 ) \ \ V ` H CHANNEL LINING
embankment
_ \ ° \ 1 \ \ � SPILLWAY ELEVATION=201.0
l \ MATTING SHALL BE AS NOTED
An annual inspection by an appropriate Make needed repairs immediately - - - - - I / / \ 1 �� I OR APPROVED EQUAL. B
professional shows that the embankment v.
needs repair
GRASS SPILLWAY DETAIL GRASS SOD ON SPILLWAY
e outlet device Clogging has occurred Bean out the outlet device and dispose of � /
99 9 Po / / „i / / AMU SIDE SLOPES
sediment h a location where it will not / // � // J � / / /
cause impacts to streams or the SCM r. r S' ° / I - / ;i ILiL+'F'+irr e
INLET PIPE WITH
The outlet device is damaged Repair or replace the outlet device RIP-RAP APRON / // //I / / �1 / I / . ` # '
p (DESIGNED BY OTHERS) //r/ f /� J / I / -�� S \ STAGE/STORAGE TABLE *,� :. � ;�';
��i�
The receiving water Erosion or other signs of damage have Repair the damage and improve the flow \ \ CONTOUR AREA INCREMENTAL TOTAL STORAGE � �4 ���11
�w
occurred at the outlet dissipation structure \ / 1 (SF) STORAGE (CF) (CF) �
f t I 7 / STAGE(FT) ELEVATION (FT}
1 RIP RAP DISSIPATER _ 1 SF s
/\ / 0.0 196.0 11980 0 0 0515� ,
Discharges from the infiltration trench are Contact the local NCDEQ Regional Office l / PAD 11
causing erosion or sedimentation in the 1.0 197.0 13285 12633 12633
41
receivin water WIDTH=20 �• \ 2.0 198.0 14650 13968 26600 y
r i LENGTH=23 I - 3.0 199.0 16070 15360 41960
1 I THICKNESS=36" / \- _ - - - TOP OF 4.0 200.0 17545 16808 58768
I I RIP RAP CLASS=2 GRASS SPILLWAY - - - / EMBANKMENT �1 5.0 201.0 19080 18313 77080 (WQV)
OPERATION AND MAINTENANCE: ! / I 1 i , l REFER TO DETAIL _ �_ ELEV=203.0 - \ 6.0 202.0 20670 19875 96955
•�,� ` I 1 ► r / , , /
North Carolina storm water rules require quarterly inspections by the regulating agency of infiltration areas as a minimum. More THIS SHEET 7.0 203.0 22320 21495 118450� I ` � I � I
frequent inspections by the land owner or system operator are strongly encouraged to ensure the proper operation of infiltration
areas.
A. Rainfall Event (STORMWATER MANAGEMENT DESIGN INFILTRATION SYSTEM #2:
1. Inspect the basin after every rainfall event greater than 1.5 inches. GRAPHIC SCALE PLAN STATUS
B. Monthly Inspection RIVER BASIN: CAPE FEAR 01/25/23 INITIAL SUBMISSION
1. Inspect the basin monthly 50 a 25 50 100 200 RECEIVING STREAM: UPPER LITTLE RIVER
2. Check the infiltration area side slopes; remove trash and repair eroded areas before the next rainfall event. STREAM INDEX: 18-20-(8) 05/16/23 2ND SUBMISSION
3. Check the vegetative and rock filters for sediment accumulation, erosion and proper operation of the flow spreader STREAM CLASS: C 07/05/23 3RD SUBMISSION
mechanism and repair as necessary. PLAN VIEW HUC: 0303000402
C. Quarterly Inspection ( IN FEET ) PROJECT COORDINATES: 35.316452'N, -78.919260'W
1. Inspect the collection system (i.e. catch basin, pipes and grass swales) for proper functioning. Clear accumulated 1 inch = 50 ft.
trash from basin grates and basin bottoms. Check piping for obstructions. POND DESIGN SUMMARY
2. Check pond inlet pipes for undercutting, replace rip-rap and repair broken pipes. DRAINAGE AREA TO POND: 13.77 ACRES DATE DESCRIPTION
3. Reseed grassed swales, including the vegetated filter if applicable, twice a year as necessary. Repair eroded areas SITE IMPERVIOUS AREA TO POND: 2.96 ACRES
immediately. OFF-SITE DESIGN IMPERVIOUS AREA TO POND: 0.0 ACRES CB CB CEP
D. Six Month Inspection TOTAL DESIGN IMPERVIOUS AREA TO POND: 2.96 ACRES DESIGN DRAWN CHKD
1. Remove accumulated sediment from the bottom of the outlet structure or other areas where accumulated sediment PRE-DEVELOPED POST-DEVELOPED POST DEVELOPED H: 1" = 50'
is noted. STORMWATER MANAGEMENT SYSTEM DETAILS SCALE
2. Inspect the embankment taking note of any wet areas where water may be seeping through the soil. 1 TO POND TO POND THROUGH POND V:
E. General Inspection NOT TO SCALE DRAINAGE AREA: 6.70 AC 13.77 AC
1. Maximum grass height is to be 6in. CURVE NUMBER: 72.9 79.20 OB No. 220164-01-002
2. No woody vegetation shall be allowed to grow in the infiltration area. TIME OF CONCENTRATION: 15.9 MIN 5.0 MIN
3. Debris shall be removed from blocking the inlet and outlet structures and from areas of potential clogging. DATE JANUARY 25, 2023
4. Periodic removal of dead vegetation shall be accomplished. 1.0" STORM EVENT: 0.284 CFS 0.000 CFS
5. All components of the infiltration system must be kept in good working order. 1-YEAR STORM EVENT: 7.022 CFS 28.96 CFS 0.000 CFS FILE No.
2-YEAR STORM EVENT: 10.72 CFS 40.36 CFS 0.000 CFS
10-YEAR STORM EVENT: 22.26 CFS 74.07 CFS 3.971 CFS
100-YEAR STORM EVENT: 42.63 CFS 130.16 CFS 84.98 CFS
HEET SCM-2
S
Cad file name: V:\220164 - Stonegate\220164-01-002 (ENG) - Ducks Landing - Darroch Road\Engineering\Engineering Plans\Construction Plans\048-030-SWD.dwg

RIP-RAP PRE-TREATMENT REMOVABLE CAP
FOREBAY AT PIPE INLETS
SEE DETAIL THIS SHEET 6' SCHEDULE 40 PVC, SOR35, OR SMOOTH WALL CORRUGATED
STORMWATER MANAGEMENT NOTES: TOP OF EMBANKMENT = 196.5 PLASTIC PIPE WITH 3/8' PERFORATIONS 0 6"ON CENTER (4
100-YEAR STORM ELEVATION = 195.84 \//\//\//\//\//\//\ \ % /\\/\\/\\/\\/\\/\\i HOLES PER ROW)
1. THE DEVELOPER OR HIS AGENT SHALL CONTACT THE DESIGN ENGINEER WHEN 10-YEAR STORM ELEVATION = 195.10 \//\\//\\//////\\///\\//\\//\\///\\ \\ GRASS SOD / j\/\\\/\\\/\\\/\\\/\\ \ \\ PERMEABLE PAVEMEFLUSH WITH NT PAVEMENT IN
/ /\/ / /
THE BEST MANAGEMENT PRACTICE(S) ARE CONSTRUCTED AND ABOUT TO \/\/\
BECOME OPERATIONAL SO A ANAL INSPECTION CAN BE PERFORMED TO SPILLWAY ELEVATION = 195.0 \\/
\//\//\//\ FILTER FABRIC AT BOTTOM
DETERMINE COMPLIANCE WITH THE APPROVED PLAN CAN BE PERFORMED. / AND SIDES OF CLEAN SANG ////\//\//\//\//\//\ °
2. ANNUAL MAINTENANCE INSPECTION AND REPORT REQUIRED THE OWNER Of 2-YEAR STORM ELEVATION = 193.69 \\�%\\!\\!\!\\!\ coo
o
�\///\//�\//� z
A PERMITTED STRUCTURAL STORMWATER BMP/CONTROL SHALL ANNUALLY
SUBMIT A MAINTENANCE AND INSPECTION REPORT FOR EACH BMP TO THE ///�//�//�//�//�//�//��i�%\ \ V-0" CLEAN SANG / \\j\\j\\j\\j\\j\\j\\j\\j\\\ 00°
1-YEAR STORM ELEVATION = 193.12 \\\\\\ \\ \\\\\\ \\\\\\ \ % i ° °
STORMWATER ADMINISTRATOR. ANNUAL INSPECTIONS SHALL BEGIN WITHIN / //// ////// // ////// \ `\\ \\ \\\\\\ \\\\ \
ONE YEAR OF THE RECORDATION OF ANY S SHOWING STORMWATER \\\\\\\\/\\\\\\\\\\\\\\\\\\\\\\\\\ /�3��i /`//j//j//j//j//j//j//j// °° c„
1.0' RAINFALL ELEVATION = 192.07 \//\//\//\//\///\//\//\//\//\ \i %\%\%\\/\%\%\%\% INFILTRATION °°° w
\ \ \ \ \ \ \ \
BMPs/CONTROL STRUCTURES. \\j\\j\\j\\j\\j\\j\\j\\j\\j\\j\ y a /\//\//\//\//\//\//\//\//\//\// SAND MEDIA ° a
EXISTING GRADE = 192.0 BOTTOM OF BASIN = 192.0 //\//\\//\\//\\//\\//\\//\\//\\//\\ \\ W }i// //\\//\\//\\//\\//\\//\\//\\//\\/\\ ` >
3. UPON COMPLETION OF THE PROJECT, AND BEFORE A CERTIFICATE OF \/\/\/\/\/\/\/\/\/\ y /\/\/\/\/\/\/\/\/\/ J °°° x
OCCUPANCY SHALL BE GRANTED, THE ENGINEER Of RECORD SHALL CERTIFY FILTER MIXTURE /\\/\\ \\ \\\\ \\ \\\\ \�\\\ //\\\/\\\/\\\/\\\/\\\/\\\//\\\/\\\/\\ \ 0.0 a
THAT THE COMPLETED PROJECT IS IN ACCORDANCE WITH THE APPROVED
STORMWATER MANAGEMENT PLANS AND DESIGNS.
1 -0 OF CLEAN ASTM C-33
4. A FINAL INSPECTION OF THE SITE AND STORMWATER MANAGEMENT SAND (MEDIUM AGGREGATE SAND °
BMP/CONTROLS TO BE SCHEDULED WITH AND COMPLETED BY THE PROJECT WITH A SIZE RANGE EG 0E S INCH o 'o°
ENGINEER. TO 0.04-INCH DIAMETER) °°°
5. NCDEQ AND THEIR ASSIGNS HAVE RIGHT TO ACCESS THE STORMWATER CL W UNDISTURBED SUBSOIL
CONTROL(s) FOR INSPECTIONS OR MAINTENANCE AS NECESSARY. Uj o LAYER OF GEOTEXTILE PERMEABLE r„ INSERT 4"-6" INTO
a FILTER FABRIC (MIRAFI N-SERIES IN-SITU SOIL BASE OBSERVATION WELL
6. THE ENGINEER'S CERTIFICATION OF COMPLETION WILL BE REQUIRED PRIOR TO C4 OR EQUIVALENT) _ ? FILTER FABRIC
THE FINAL PLAT OR CERTIFICATE OF OCCUPANCY. THE STORMWATER ® o SCALE: N.T.S.
CONTROL IS TO BE INSPECTED TO ENSURE IT IS FUNCTIONING AS DESIGNED V-0" MIN. UNDISTURBED IN-SITU �
AND HAS FULL DESIGN VOLUME PRIOR TO ISSUANCE Of THE FINAL SOIL
CERTIFICATE OF OCCUPANCY. S2 m
7. THE PROPERTY OWNER IS RESPONSIBLE FOR MAINTAINING THE STORMWATER Z z
CONTROLS(s) ACCORDING TO THE APPROVED MAINTENANCE PLAN AND N "-'
DIRECTION OF NCDEQ. C STORM DRAINAGE PIPE OR
CONCRETE FLUME
DUVALL INTO POND LENGTH & WIDTH
SEASONAL HIGH WATER TABLE = 180.0 DIMENSIONS TO BE PE
RIP-RAP
APRON DETAIL FILTER BED ELEVATION
V
BIO-RETENTION POND
INFILTRATION BASIN TYPICAL SECTION -._- ---,- -; TAPER DEPTH
•-11
o
NT5 _ _ = FOREBAY 1' - ro CD
Q n ca
2' 000<.0000000000000000 0 c ❑ can �
✓� ✓ �..I�'���I' �' �� I� II ul ;o�o�o�o�o�o�o�o�<g��,�� H N c� 0
LLJ
=11-I I� I� -i r- i� I� I-III=1I I1=1I 1=1I Z o�
-11 I-III-I I-III-I III-I Q = rn E
2! M - � z
o
0 J C C
OPERATION & MAINTENANCE PROVISIONS (INFILTRATION} RIP RAP OVER
GRASS SOD NOTE: RIP-RAP FOREBAY FILTER FABRIC o
BMP element: Potentialproblem: How to remediate the problem SCALE: N.T.S. m m
e entire infiltration bash Trash/debris is present Remove the trash/debris GRASS SOD SHALL BE EITHER HYBRID BERMUDA GRASS OR CENTIPEDE THAT HAS BEEN GROWN IN A
SOIL THAT IS FREE OF AN IMPERMEABLE LAYER (SUCH AS CLAY).
e gross filter strip or other pretreatment Areas of bare sail and/or erosive gullies Regrode the soil if necessary to remove
area have formed the gully, plant ground cover and water NOTES:
until established. Provide lime and a 1. ALL INFILTRATION BASINS SHALL HAVE AN ACCESS EASEMENT CONNECTING TO A DEDICATED PUBLIC RIGHT Of WAY.
one-time fertilizer application
2. ALL DRAINAGE AREAS TO AN INFILTRATION BASIN ARE TO BE STABILIZED PRIOR TO INSTALLATION OF SOILS OR GRASS SOD.
Sediment has accumulated to a depth Search for the source of the sediment and LTER MEDIA(SEE NOTE 2) f n
greater than three inches remedy the problem if possible. Remove 3. THE DRAINAGE AREA OF THE INFILTRATION BASIN WILL BE CAREFULLY MANAGED TO REDUCE THE SEDIMENT LOAD TO THE SAND FILTER MID �J J C)the sediment and dispose of it in a SYSTEM. SILT FENCE AS NEEDED J Z
location where it will not cause impacts FLOW
4. THE WATER LEVEL IN THE MONITORING WELL(S) WILL BE RECORDED ONCE A MONTH AND AFTER EVERY STORM EVENT GREATER THAN 1.5 �� Q
to streams or the SCM INCHES.
e flow diversion structure (if applicable) The structure is dogged Unclog the conveyance and dispose of any 5. IMMEDIATELY AFTER THE INFILTRATION BASIN IS ESTABLISHED, THE VEGETATION WILL BE WATERED TWICE WEEKLY If NEEDED UNTIL PLANTS - w Z
sediment in a location where it will not BECOME ESTABLISHED (COMMONLY SIX WEEKS) �07Y C) ❑
cause impacts to streams or the SCM O
6. NO PORTION Of THE INFILTRATION BASIN WILL BE FERTILIZED AFTER THE INITIAL FERTILIZATION THAT IS REQUIRED TO ESTABLISH THE
The structure is damaged Make any necessary repairs or replace if VEGETATION. NOTES-
The ATER LEVEL U
damage is too much for repairz
7. THE VEGETATION IN AND AROUND THE BASIN WILL BE MAINTAINED AT A HEIGHT OF APPROXIMATELY SIX INCHES.
inlet device The inlet i is d if a likable Und the i e and dis dispose of an 1. PRIOR TO INSTALLATION, MANUFACTURER SPECIFICATIONS OF FILTER MEDIA SHALL BE REVIEWED TO L'�"I I� W
P ( applicable) pipe p y ENSURE THAT DISCHARGE FROM FILTER MEDIA SHALL MEET OR EXCEED THE PROVISIONS OF THE CLEAN 5
sediment in a location where it will not WATER ACT Q z
.
cause impacts to streams or the SCM w IIr
2. ENSURE THAT PUMP PRESSURE DOES NOT EXCEED FILTER MEDIA PRESSURE RATING. r _
The inlet pipe is cracked or otherwise Repair or replace the pipe Q
damaged (if applicable) 3. FILTER MEDIA MAY BE, BUT NOT LIMITED TO, SAND MEDIA FILTRATION DEVICES, RATED FILTER FABRIC
BAGS OR POLYMER BASED DEWATERING PRACTICES.
Erosion is occurring in the swde Regrade the Swale if necessary and 4. PUMP STRAINER SHALL NOT BE IN CONTACT WITH BOTTOM OF POND. Q 1�
(if applicable) provide erosion control devices such as
reinforced turf matting or rip-rap to avoid V 1
future erosion problems BMP POND DEWATERING LOW POINT Z
Stone verge is dogged or covered in Remove sediment and clogged stone and 1 1 1 I Ali �� ./ ✓/ ✓ 1 _3f J
sediment (if applicable) replace with dean stone - -t ` \` INLET PIPE WITH r ✓✓ / / / Uj
( / RIP RAP DISSIPATER RIP-RAP APRON
e basin More than four inches of sediment has Search for the source of the sediment and �� \\ �� \ ti PAD #13 ., (DESIGNED BY OTHERS) , i - ✓ i /
accumulated remedy the problem if possible. Remove ^ -� \ WIDTH=11' i ✓ice ✓ r - / -i // / Q
the sediment and dispose of it h a -✓ l J i� i i - / ✓ /
location where it will not cause impacts - - - 1 1, LENGTH=13 _ \ �i �i ✓ f i ' r - - / Q
to streams or the SCM / i� i / / �'- l - - / FLOW *LONG TOP OF EMBANKMENT CC cc
\ I THICKNESS=24 / \ �� i / / // / r r / SPILLWAY Q(100) SLOPE(%) H 8 W SS CHANNEL LINING ELEVATION SPILLWAY ELEVATION G
RIP RAP CLASS=1// �. 1 -� / ^ ^ � 2
Erosion of the bash surface has occurred Provide additional erosion protection such / l I \ / �� ) 0
or riprop is displaced as reinforced turf matting or riprop if / _ \ \ \ \ / \ i STORMWATER ( \ �� INFILTRATION STRAW WITH NET NAG rO
needed to prevent future erosion problems - ( \, \ � �'� \ MANAGEMENT \ �J -� SPILLWAY 40.21 CFS 33.33% 1.5 20.0 29,0 3:1 SHOREMAX W/ P300 196.5 195.0 CE
OBSERVATION �/ ,� �\� \\ EASEMENT ► Il l \ �^ f~� �
Water is standing more than three days Replace the top few fiches of soil to see \ WELL (TYP.) \ f \ R C J <
\ I /` LONGITUDINAL SLOPE - Q
after a storm event g P ` I I ° �� \ '� ` r 3.1 BACK SLOPE FROM EMBANKMENT EXTEND LINING TO EXTw ❑
if this corrects the standing water problem. �"` (
If not, consult an appropriate professional \ 1 - \ TOP OF SPILLWAY TOP (II LINING TO
for a more extensive repair '� \ \ \ \ ^ \ \ ��\ \\ 1 ` 1 J TOP OF SPILLWAY TOP OF EMBANKMENT=196.5
e embankment Shrubs or trees are growing on the Remove trees and shrubs immediately `�\ \ \ \ ^� \� \\ /( I / /� r �/ H CHANNEL LINING
embankment ��_ ~ \ \ `\\ \o �� J
�/I f 1 ( l SPILLWAY ELEVATION=195.0
An annual inspection by an appropriate Make needed repairs immediately \ \ `� \� \ �, \ / / 1 / / MATTING SHALL BE AS NOTED
professional shows that the embankment •�\ L^ \\\^ \ \ ` - 1 \ J / ,/ // / / OR APPROVED EQUAL. g
needs repair
\\ ° \ TOP OF / GRASS SPILLWAY DETAIL GRASS SOD ON SPILLWAY
e outlet device Clogging has occurred Clean out the outlet device and dispose of `\ \ / \ _ \_ \ \� EMBANKMENT
� � � \ \ AND SIDE SLOPES
sediment h a location where it will not \ \ w \\ �1 \�l�^ L _� �\ o - _r �1�1 ELEV=196.5 �\
cause impacts to streams or the SCM
The outlet device is damaged � �' .�..A... �R air or re lace the outlet device STAGE/STORAGE TABLE ,{+
x�
\����- - / CONTOUR AREA INCREMENTAL TOTAL STORAGE
e receiving water Erosion or other signs of damage have Repair the damage and improve the flow 1 ` \ \\ \ \ --_ / i STAGE(FT) ELEVATION (FT) �
occurred at the outlet dissipation structure �1 /\ \ 1 / / (SF) STORAGE (CF) (CF) F
GRASS SPILLWAY / - : SF AI.
i 0.0 192.0 8345 0 0 051.5 ,
Discharges from the infiltration trench are Contact the local NCDEQ Regional Office L / y �` REFER TO DETAIL
causing erosion or sedimentation h the ( \ \ 1\ w
- - - / / 1.0 193.0 9530 8938 8938
receiving water ` ` \ ., y �l ( `\ / �' "� \ THIS SHEET / / / // 2.0 194.0 10775 10153 19090
3.0 195.0 12075 11425 30515 (WQV) _
'} l 1 �- \ �\ \ y \�11� \ \ ) // / /// 4.0 196.0 13430 12753 43268
i v
\ \ l \ �\ v - 4.5 196.5 14130 6890 50158 ,
OPERATION AND MAINTENANCE: \\ \ \ \ \�� `� \ \ 1 J <�
North Carolina storm water rules require quarterly inspections by the regulating agency of infiltration areas as a minimum. More \ \ ` \� �` �"��� \� `� \�� -�✓ � ) /` L
frequent inspections by the land owner or system operator are strongly encouraged to ensure the proper operation of infiltration
areas.
A. Rainfall Event (STORMWATER MANAGEMENT DESIGN INFILTRATION SYSTEM #3:
1. Inspect the basin after every rainfall event greater than 1.5 inches. GRAPHIC SCALE PLAN STATUS
B. Monthly Inspection RIVER BASIN: CAPE FEAR 01/25/23 INITIAL SUBMISSION
1. Inspect the basin monthly 50 a 25 50 100 200 RECEIVING STREAM: UPPER LITTLE RIVER
2. Check the infiltration area side slopes; remove trash and repair eroded areas before the next rainfall event. STREAM INDEX: 18-20-(8) 05/16/23 2ND SUBMISSION
3. Check the vegetative and rock filters for sediment accumulation, erosion and proper operation of the flow spreader STREAM CLASS: C 07/05/23 3RD SUBMISSION
mechanism and repair as necessary. PLAN VIEW HUC: 0303000402
C. Quarterly Inspection ( IN FEET ) PROJECT COORDINATES: 35.316452'N, -78.919260'W
1. Inspect the collection system (i.e. catch basin, pipes and grass swales) for proper functioning. Clear accumulated 1 inch = 50 ft.
trash from basin grates and basin bottoms. Check piping for obstructions. POND DESIGN SUMMARY
2. Check pond inlet pipes for undercutting, replace rip-rap and repair broken pipes. DRAINAGE AREA TO POND: 6.00 ACRES DATE DESCRIPTION
3. Reseed grassed swales, including the vegetated filter if applicable, twice a year as necessary. Repair eroded areas SITE IMPERVIOUS AREA TO POND: 0.88 ACRES
immediately. OFF-SITE DESIGN IMPERVIOUS AREA TO POND: 0.0 ACRES CB CB CEP
D. Six Month Inspection TOTAL DESIGN IMPERVIOUS AREA TO POND: 0.88 ACRES DESIGN DRAWN CHKD
1. Remove accumulated sediment from the bottom of the outlet structure or other areas where accumulated sediment PRE-DEVELOPED POST-DEVELOPED POST DEVELOPED H: 1" = 50'
is noted. STORMWATER MANAGEMENT SYSTEM DETAILS SCALE
2. Inspect the embankment taking note of any wet areas where water may be seeping through the soil. 1 TO POND TO POND THROUGH POND V:
E. General Inspection NOT TO SCALE DRAINAGE AREA: 2.42 AC 6.00 AC
1. Maximum grass height is to be 6in. CURVE NUMBER: 72.9 77.5 OB No. 220164-01-002
2. No woody vegetation shall be allowed to grow in the infiltration area. TIME OF CONCENTRATION: 30.8 MIN 5.0 MIN
3. Debris shall be removed from blocking the inlet and outlet structures and from areas of potential clogging. DATE JANUARY 25, 2023
4. Periodic removal of dead vegetation shall be accomplished. 1.0" STORM EVENT: 0.094 CFS 0.000 CFS
5. All components of the infiltration system must be kept in good working order. 1-YEAR STORM EVENT: 1.646 CFS 11.59 CFS 0.000 CFS FILE No.
2-YEAR STORM EVENT: 2.563 CFS 16.43 CFS 0.000 CFS
10-YEAR STORM EVENT: 5.379 CFS 30.78 CFS 1.569 CFS
100-YEAR STORM EVENT: 10.41 CFS 55.12 CFS 40.21 CFS
�--� S
SHEET CM-3
Cad file name: V:\220164 - Stonegate\220164-01-002 (ENG) - Ducks Landing - Darroch Road\Engineering\Engineering Plans\Construction Plans\048-030-SWD.dwg

CONSTRUCTION SEQUENCE Tpp TOP Of STRUCTURE NOT SHOWN FOR CLARITY 4" PVC SCREW CAP RISER STRUCTURE
FOR WET DETENTION POND: p�R c (REMOVABLE TRASH RACK) FOR CLEANING ACCESS
1. INSTALL EROSION CONTROLS. /H
2. CONSTRUCT DAM BASE AND AREAS BELOW THEM�IA
JE
NORMAL POOL. CONSTRUCTION TO BE � EXTEND 4'
PERFORMED UNDER THE INSPECTION OF THE 12" MIN.
GEOTECHNICAL ENGINEER. SEED UPON PVC
THROUGH
COMPLETION
4' MIN
RISER
3. INSTALL OUTLET PIPE, RIP-RAP APRON AND EMBANKMENT WIDTH STRUCTURE
STONE FILTER RING. 4"x4" PVC TEE
f,Q FT
4. CONSTRUCT OUTLET STRUCTURE 6' TOPSOIL FOR ALL PERM. POND ELEV.=185.0
AREAS ABOVE THE TRASH RACK
5. REMOVE ACCUMULATED SEDIMENT AND SEED NORMAL POND ELEVATION REFER TO DETAIL
UPON COMPLETION. THIS SHEET
24' HOPE WITH WATER TIGHT SEAL I 12" MIN.
PIPE TO BE BEDDED TOP Of EMBANKMENT ELEVATION=191.0
PER DIRECTION OF GEOTECHNICAL fi" TOPSOIL ABOVE NOTE: 1.0" STORM ELEVATION IS 185.18 AND INTERMEDIATE OUTLET CONTROL STRUCTURE - INCREMENTAL WEIR ENGINEER y 6" CLAY LINER REFER TO DETAIL 100 YEAR STORM ELEVAT WEIR IS ELEVATION 185.7. THERE IS ADDITIONAL STORAGE SCALE: N.T.S.ON=190.21 DESIGNED FROM THE 1.0" STORM ELEVATION TO THE
ON LITTORAL SHELF FOR INCREMENTAL
6' CLAY SOIL INTERMEDIATE WEIR ELEVATION.
1 LINER ON INSIDE 11 3 WEIR
6" TOPSOIL FOR ALL 2" DIA. HOLE DRILLED
FACE OF 10 YEAR STORM FLEVATION=188.24 AREAS ABOVE THE INTO BOTTOM CAP
EMBANKMENT I 1 NORMAL POND ELEVATION
6 PVC DRAIN OUTLET
44' PRECAST FOREBAY BERM FOREBAY TOP ELEV= 187.0 SCALE N.T.S.
6FT UTTORAL 1 CONCRETE RISER 2 YEAR STORM ELEVATION=186.88 WIDTH AT TOP = 2.0 FT
SHE (INSTALL STEPS
III- AS NECESSARY) 1 YEAR STORM ELEVATION=186.43
6' TOPSOIL ABOVE
6" CLAY LINER 3:1 NOTE: PUMPS SHALL BE USED TO DRAIN
ON LITTORAL SHELF THE FOREBAY WHEN NECESSARY. REFER TO DETAIL
1.0-INCH STORM ELEVATION=185.18 EXISTING GRADE=189.0t SEDIMENT STORAGE THIS SHEET FOR DEWATERING REQUIREMENTS.
INV=185.0� TOP FOREBAY BOTTOM� NORMAL POND ELEVATION=185.00 6FT LITTORAL - d/ ELEV-182.0 3�
PVC ELBOW SHELF 6 NORMAL POND ELEVATION
3' MIN � � I SEE DETAIL 2 - BOTTOM LITTORAL SHELF ELEV. -
1 ELEV=183.0 2 NOTE: PUMPS SHALL BE USED TO ORAIN 1
1 1 THE POND WHEN NECESSARY. REFER TO DETAIL CLASS B RIP-RAP
THIS SHEET FOR DEWATERING REQUIREMENTS. OVER FILTER FABRIC
° MIN. 4' GRASS FOREBAY
4' AIN. ASTM C-923 SEAL WEIR AT ELEV=184.0 � rn n
KEY BETWEEN BARREL dr RISER. Cc u-
RISER BASE TO BE FILLED OS75 MAT UNDERLAYMENT r�
CUTOFF TRENCH WITH CONC. TO INVERT OF BOTTOM OF POND (TOP OF SEDIMENT STORAGE)=180.0 AT FOREBAY BERM - o F- N co
BARREL CONCRETE SHALL BE FOREBAY ENTRANCE SHALL BE AREAS ABOVE THE TOPSOIL FOR U w r U a U
APPROXIMATE SIZE PLACED IN RISER AFTER
EXCAVATE AND BACKFILL 8'X8'XI"X12' LONG ANGLE 6 TOT. REQUIRED TO ANCHOR RISER TO DEEPER THAN FOREBAY EXIT NORMAL POND ELEVATION � z w
( ) (BOTTOM OF SEDIMENT STORAGE)=179.0 2
ANGLES ARE SECURED Q rn E
WITH COMPACTED BASE. PROVIDE 2-3/4" A307 BOLTS FROM ANGLE TO RISER AND TO BASE AND RISER. BOTTOM OF SEDIMENT o DO [� o
STRUCTURAL FILL AS ANGLE TO BE FIELD COATED WITH ZINC RICH PAINT AFTER �J ELEV=181.5 /
2-A307 'J' HOOKS 3/4' DIA. X 12' LONG FROM ANGLE TO BASE. STORAGE/EXIT w iy o
STORAGE ENTRANCE o J c
Cz DIRECTED BY GEOTECHNICAL CONSTRUCTION. 'J"HOOKS TO BE PLACED UNDER LOWER REINFORCING
ELEV=181.0 Q t
ENGINEER S 6" CLAY SOIL FOREBAY ENTRANCE SHALL 8E FOREBAY m m
5'x5'x1.5' CONC. BASE REINFORCE WITH #4 BARS AT 12' O.C. TOP LINER
DEEPER THAN FOREBAY EXIT
AND BOTTOM OF EACH DIRECTION PROVIDE 3" MIN. CLEARANCE MAIN POOL
19'-24" HOPE 0 1.05% BETWEEN EDGE OF CONC. AND STEEL REINFORCING.
SHALLOW LAND ZONE
HERBACEOUS PLANTS SHALLOW WATER ZONE
PROFILE OF WET POND DETENTION SYSTEM HERBACEOUS PLANTS
SCALE: N.T.S. NOTES
1. SEE DESIGN PLANS FOR SPECIFIED DIMENSIONS OF RISER.
LTER MEDIA (SEE NOTE 2) 2. TRASH RACK DIMENSION CRITERIA SPECIFIED IS APPROXIMATE AND VARIES BY MANUFACTURER. POND
3. INSTALLATION OF TRASH RACK SHALL BE ACCORDING TO MANUFACTURER'S RECOMMENDATIONS. (NORMAL POOL)
SILT FENCE AS NEEDED LIMP 4. ALL COMPONENTS Of TRASH RACK SHALL BE OF STAINLESS STEEL OR OTHER NON-CORROSIVE MATERIAL. I J U
5. ALL MOUNTING HARDWARE SHALL BE OF STAINLESS STEEL OR OTHER NON-CORROSIVE MATERIAL. 6 z
STORMWATER MANAGEMENT NOTES: TRASH RACK Q
1. THE DEVELOPER OR HIS AGENT SHALL CONTACT THE DESIGN ENGINEER WHEN NON CORROSIVE MATERIAL �� I1 �� 5.5'
THE BEST MANAGEMENT PRACTICE(S) ARE CONSTRUCTED AND ABOUT TO 0 5.5' SPACING , , TYPICAL LITTORAL SHELF VEGETATION DETAIL W z
�o/y BECOME OPERATIONAL SO A FINAL INSPECTION CAN BE PERFORMED To I 1
DETERMINE COMPLIANCE WITH THE APPROVED PLAN CAN BE PERFORMED. TRASH RACK �i 1I �\ SCALE: N.T.S Q O
ATER LEVEL 2. ANNUAL MAINTENANCE INSPECTION AND REPORT REQUIRED - THE OWNER OF ��� / 1I ��\ 5.5" (�
CONTROL SHALL ANNUALLY I 1 NURSERY CONTAINER
NOTES: A PERMITTED STRUCTURAL STORMWATER BMP
/ SCIENTIFIC NAME COMMON NAME PLANTING ZONE QUANTITY TYPE SPACING PLANTING SEASON z �
SUBMIT A MAINTENANCE AND INSPECTION REPORT FOR EACH BMP TO THE
1. PRIOR TO INSTALLATION, MANUFACTURER SPECIFICATIONS Of FILTER MEDIA SHALL BE REVIEWED TO STORMWATER ADMINISTRATOR. ANNUAL INSPECTIONS SHALL BEGIN WITHIN - I I I I Jancus effesus Soft Rush SHALLOW WATER 158 PEAT POT 6' O.C. SPRING SUMMER LU
ENSURE THAT DISCHARGE FROM FILTER MEDIA SHALL MEET OR EXCEED THE PROVISIONS OF THE CLEAN ONE YEAR OF THE RECORDATION OF ANY DEEDS) SHOWING STORMWATER I I I I I I 5.5" / ~n z
WATER ACT. BMPs/CONTROL STRUCTURES. I I I71 I I I F�Iris virginica Blue Flag Iris SHALLOW WATER 158 PEAT POT 6' O.C. SPRING/SUMMER w F--1
2. ENSURE THAT PUMP PRESSURE DOES NOT EXCEED FILTER MEDIA PRESSURE RATING. 3. UPON COMPLETION OF THE PROJECT, AND BEFORE A CERTIFICATE OF 5.5" Q
OCCUPANCY SHALL BE GRANTED, THE ENGINEER OF RECORD SHALL CERTIFY I I
3. FILTER MEDIA MAY BE, BUT NOT LIMITED TO, SAND MEDIA FILTRATION DEVICES, RATED FILTER FABRIC THAT THE COMPLETED PROJECT IS IN ACCORDANCE WITH THE APPROVED Schoenoplectus tabemaemontani Soft Stem Bulrush SHALLOW WATER 158 PEAT POT 6' O.C. SPRING/SUMMER J =
BAGS OR POLYMER BASED DEWATERING PRACTICES. STORMWATER MANAGEMENT PLANS AND DESIGNS. I I NOTE: RISER!9 L_/ -1 1 z
TRASH RACK SHALL BE INSPECTED Eupatoriadelphus maculatus Spotted Trumpetweed SHALLOW WATER 158 PEAT POT 6' O.C. SPRING/SUMMER z 1 Z
4. PUMP STRAINER SHALL NOT BE IN CONTACT WITH BOTTOM OF POND. 4. A FINAL INSPECTION OF THE SITE AND STORMWATER MANAGEMENT I I PERIODICALLY AND ANY DEBRIS ON 1�1
BMP/CONTROLS To BE SCHEDULED WITH AND COMPLETED BY THE PROJECT I I THE TRASH RACK IS TO BE REMOVED Eupatorium purpureum Joe-Pye Weed SHALLOW WATER 158 PEAT POT 6' O.C. SPRING/SUMMER
ENGINEER. - AND PROPEPo_Y DISPOSED OF.
BMP POND DEWATERING LOW POINT 5. NCOEQ AND THEIR ASSIGNS HAVE RIGHT TO ACCESS THE STORMWATER Rhynchospora cdorata Starrush Whitetop SHALLOW WATER 158 PEAT POT 6' O.C. SPRING/SUMMER �j z
CONTROL(s) FOR INSPECTIONS OR MAINTENANCE AS NECESSARY. RISER RISER TRASH RACK DETAIL
6. THE ENGINEER'S CERTIFICATION OF COMPLETION WILL BE REQUIRED PRIOR TD h--� ::1SEEDBED PREPARATION: THE FINAL PLAT OR CERTIFICATE OF OCCUPANCY. THE STORMWATER TYPICAL LITTORAL SHELF PLANTING SCHEDULE �J
^
1. CHISEL COMPACTED AREAS AND SPREAD TOPSOIL IS TO BE INSPECTED TO ENSURE IT IS FUNCTIONING AS DESIGNEDL THREE INCHES DEEP OVER ADVERSE SOIL CONDITIONS, IF AND HAS FULL DESIGN VOLUME PRIOR TO ISSUANCE OF THE FINAL Q Q 0
AVAILABLE. CERTIFICATE OF OCCUPANCY. Q
2. RIP THE ENTIRE AREA TO SIX INCHES DEEP. O
3. REMOVE ALL LOOSE ROCK, ROOTS AND OTHER OBSTRUCTIONS, LEAVING SURFACE REASONABLY SMOOTH AND 7. THE PROPERTY OWNER IS RESPONSIBLE FOR MAINTAINING THE STORMWATER C
UNIFORM. COI s) ACCORDING TO THE APPROVED MAINTENANCE PLAN AND
PLYY AGRICULTURAL LIME, FERTILIZER, AND SUPERPHOSPHATE UNIFORMLY AND MIX WITH SOIL DIRECTION
4. AP SEE SEEDING G
( DIRECTIONCTION of NCOEQ. OPERATION & MAINTENANCE _
MIXTURE).5. CONTINUE TILLAGE UNTIL A WELL V
-PULVERIZED, FIRM, REASONABLY UNIFORM SEEDBED IS PREPARED FOUR To SIX O O
INCHES DEEP. BMP element: Potential problem: How I will remediate the problem
6. SEED ON A FRESHLY PREPARED SEEDBED AND COVER SEED LIGHTLY WITH SEEDING EQUIPMENT OR CULTIPACK a entire BMP Trash debris is present Remove the trash debris
AFTER SEEDING. '
7. MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR MULCH. + I I ' I I ' I / RIP RAP DISSIPATER he Perimetera a wet Areas of bare soil and/or egrade the soil i necessary to C J
8. INSPECT ALL SEEDED AREAS AND MAKE NECESSARY REPAIRS OR RE-SEEDINGS WITHIN THE PLANTING SEASON, IF ( / 1 1 PAD 15 C� STAGE/STORAGE TABLE etention basin erosive gullies have formed remove the gully, and then plant Q
POSSIBLE. If STAND SHOULD BE MORE THAN 60%DAMAGED, RE-ESTABLISH FOLLOWING THE ORIGINAL LIME, 1 \i a ground cover and water until it
FERTILIZER AND SEEDING RATES. ( I I ( WIDTH=14' CONTOUR AREA INCREMENTAL TOTAL STORAGE is established. Provide lime and
/ J i ( ( I STAGE(FT) ELEVATION (FT) S STORAGE CF CF a one-time fertilizer application
4. CONSULT SdrEC ENVIRONMENTAL ENGINEERS ON MAINTENANCE TREATMENT AND FERTILIZATION AFTER PERMANENT ) r I I LENGTH=12' / FES ( ) ( ) ( ) Vegetation is too short or too Maintain vegetation at a height
COVER IS ESTABLISHED. I / SOD AREAS ABOVE I �� �/ THICKNESS=22" �ELEV=184.8 0.0 185.0 31875 0 0 PQ longpipe 99� of aroximately six inches.
LANDSCAPING NOTES: a inlet device: a or The i e is do Unclogthe pi Dispose of the
NORMAL POOL / RIP RAP CLASS=6 0.5 185.5 34375 16563 16563 wale sediment off-site.
ALL LANDSCAPING SHALL BE IN COMPLIANCE WITH THE NCOEQ BMP REQUIREMENTS. ( / / / 0.7 185.7 34990 6937 23499 (WQV) a pipe is cracked or Replace the pipe.
I / / / EELVATION otherwise domago
1.0 186.0 35925 10637 34136 rosion is occurring in the egra e e swa e i necessary
LANDSCAPE CONTRACTOR SHALL PROVIDE A TWO-YEAR WARRMTY FOR BMP PLANTING SURVIVAL/REPLACEMENT. I I \ ` \ 2.0 187.0 39060 37493 71629 swde. to smooth it over and provide
24 OUTLET PIPE \� erosion control devices such as
AT THE END Of THE FIRST YEAR AND AT THE END OF THE TWO-YEAR WARRANTY PERIOD, ALL PLANTS THAT 00 NOT f l l I I / REFER TO GRADING 3.0 188.0 42190 40625 112254 reinforced turf matting s riprap
SURVIVE MUST BE REPLACED. / to avoid future problems with
� / e 4.0 189.0 44530 43360 155fi14 P
PLAN erosion.
ESTABLISHMENT PROCEDURES, SUCH AS CONTROL OF INVASIVE WEEDS, ANIMAL AND VANDAL DAMAGE, MULCHING, / \ 5.0 190.0 46925 45728 201341 a forebay Sediment has accumulated to Search for the source of the
/ $ 6.0 191.0 49380 48153 249494 a depth greater than the sediment and remedy the
RE-STAKING, WATERING, AND MESH OR TUBE PROTECTION REPLACEMENT, SHALL BE IMPLEMENTED TO THE EXTEND or inal design depth for problem if possible. Remove the
( MAIN POND AREA n se invent storage. sediment and dispose of it in a
NEEDED TO ENSURE PLANT SURVIVAL. STAKING MUST BE REMOVED AFTER ESTABLISHMENT APPROXIMATELY 12 \ � titisFrr+
MONTHS), TO PREVENT GIRDLING (STRANGLING) Of ALL WOODY PLANTS. OUTLET CONTROL location where it will not cause STRUCTURE REFER impacts to streams or the BMP. ,�' G A 80
{rx
Provide *� r+++•. +
SOD WITHIN BMP AND SURROUNDING AREAS TO BE BERMUDA OR CENiIPEDE GRASS. J / \
rostan as occu ai iona erosion
/ / TO DETAILS ON 1 protection such as reinforced turf i � 4�9
/ / \ matting or riprap if needed to
GRASS OR WILDFLOWER SEED MUST BE APPLIED AT THE RATES SPECIFIED BY THE SUPPLIERS. If PLANT / / / / I / DS75 MAT \ THIS SHEET ( revent future erosion oroblems. ; F
Weeds are present Remove the weeds, preferably b ESTABLISHMENT CANNOT BE ACHIEVED WITH SEEDING A THE TIME OF SUBSTANTIAL AREA
COMPLETION OF THE OD, PLUGS,
/ I UNDERLAYMENT AT (STORMWATER MANAGEMENT DESIGN WET DETENTION POND #4: hand. If pesticide is used, wipe 051 1
FACILITY PORTION OF THE PROJECT, THEN THE CONTRACTOR SHALL PLANT THE AREA WITH WILDFLOWER 500, PLUGS, / / / / \ � pe
CONTAINER PLANTS, OR OTHER MEANS TO COMPLETE THE SPECIFIED PLANTING AND PROTECT AGAINST EROSION / J / FOREBAY BERM `"' on the plants rather than
BEFORE WATER IS ALLOWED TO ENTER THE STORMWATER BMP FACILITY. \ RIVER BASIN: CAPE FEAR spraying.
rr �
( ( DS75 MAT TOP OF RECEIVING STREAM: UPPER LITTLE RIVER a vegetated shelf Best pro ssiond practices rune according to best i 1i t
show that pruning is needed professional practices **
ALL MATERIALS SHALL BE ACQUIRED FROM AN APPROVED NCOEQ PLANT VENDOR. PLANT MATERIAL SHOULD BE \ I I I I I I UNDERLAYMENT AT ( EMBANKMENT STREAM INDEX: 18-20-(B) to maintain optimal plant +# 0 - �•
PURCHASED FROM A LOCAL SOURCE TO ENSURE SURVIVABILITY. LOCAL VENDORS FOR THIS SITE INCLUDE: i I CLASS B ELEV=191.0 STREAM CLASS: C hedth. *'
I I FOREBAY BERM
- GILL WOE NATIVE PLANT NURSERY 919-662-5566 � � I I RIP-RAP AT Plants are dead, diseased or Determine the source of the
i I I FOREBAY WEIR I i HUG: 0303000402
- GROWING WILD NURSERY 919-731-798 t / I PROJECT COORDINATES: 35.316452'N -78.919260'W dying. problem: says, hydrology, disease,
- NC FOREST SERVICE 919-731-7988 O/ / I , etc. Remedy the problem and
- PLANT DELIGHTS NURSERY 919-772-4794 IXX ants. Provide a
- TARHEEL NATIVE TREES 919-553-5927 p �� ( ae / POND DESIGN SUMMARY one-time fertilizer application to
establish the ground cover if a
DRAINAGE AREA TO POND: 21.05 ACRES soi test indicates it is necessary,
IMMEDIATELY AFTER THE WET DETENTION BASIN IS ESTABLISHED, THE PLANTS ON THE VEGETATED SHELF AND SITE IMPERVIOUS AREA TO POND: 5.34 ACRES Weeds are present Remove the weeds, preferably by
PERIMETER OF THE BASIN SHOULD BE WATERED TWICE WEEKLY IF NEEDED UNTIL THE PLANTS BECOME ESTABLISHED ( `\ -- --„ - 7/ OFF-SITE DESIGN IMPERVIOUS AREA TO POND: 0.0 ACRES hand. If pesticide is used, wipe it
(COMMONLY SIX WEEKS) I - - - - ;a TOTAL DESIGN IMPERVIOUS AREA TO POND: 5.34 ACRES on the plants rather than
/ g.
STORMWATER \ ` / LITORAL SHELF a main treatment area Sediment has accumulated to Senrdi far the source of the PLAN STATUS
NO PORTION Of THE WET DETENTION POND SHOULD BE FERTILIZED AFTER THE FIRST INITIAL FERTILIZATION THAT IS �T1 MANAGEMENT // �i PRE-DEVELOPED POST-DEVELOPED POST DEVELOPED a depth greater than the sediment and remedy the
REQUIRED TO ESTABLISH THE PLANTS ON THE VEGETATED SHELF. 1/ \ L AREA=3,785 SF ��� TO POND TO POND THROUGH POND original design sediment problem if possible. Remove the 01/25/23 INITIAL SUBMISSION
LANDSCAPING NOTES: / I I REFER TO DETAIL storage depth. sediment and dispose of it in a
EASEMENT \ I ` DRAINAGE AREA: 15.79 AC 21.05 AC location where it will not case 05/16/23 2ND SUBMISSION
FOR PLANTINGS
1. CONTRACTOR SHALL COMPLY WITH ALL APPLICABLE CODES AND ORDINANCES REGARDING LANDSCAPING. / CURVE NUMBER: 72.7 80.1 impacts to streams or the BMP.
/ / \ \ ro - - - - - - - TIME OF CONCENTRATION: 23.5 MIN 5.0 MIN Algal growth covers over Consult a proessional to remove 07/05/23 3RD SUBMISSION
2. IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO ESTABLISH A HEALTHY STAND OF GRASS ON ALL SEEDED / FOREBAY AREA - of the area. and control the algal growth.
AREAS. I \ / ttals, phragmites or other Remove the plants b wiping
3. CONTRACTOR SHALL PROVIDE NATURAL TOPSOIL THAT IS FERTILE, FRIABLE, WITHOUT MIXTURE OF SUBSOIL V s / 1.0" STORM EVENT. 0.667 CFS 0.032 CFS invasive plants cover 50X of them with pesticide Ido no
MATERIALS, AND OBTAINED FROM A WELL DRAINED, AVAILABLE SITE. IT SHALL NOT CONTAIN SUBSTANCES RIP RAP DISSIPATER - - STORMWATER / 1-YEAR STORM EVENT: 12.26 CFS 46.22 CFS 2.155 CFS the basin surface. spray)
WHICH MAY BE HARMFUL TO PLANT GROWTH. TOPSOIL SHALL BE SCREENED AND FREE FROM CLAY, LUMPS, \ e embankment Shrubs have started to grow Remove shrubs immediately.
I PAD 14 J 2-YEAR STORM EVENT: 19.04 CFS 64.00 CFS 4.175 CFS DATE DESCRIPTION
STONES, ROOTS, PLANTS, OR SIMILAR SUBSTANCES 1" OR MORE IN DIAMETER, DEBRIS, OR OTHER OBJECTS ----- # - INLET PIPE WITH MANAGEMENT - i Ev the embankment
WHICH MIGHT BE A HINDERANCE TO PLANTING OPERATIONS. TOPSOIL SHALL CONTAIN AT LEAST 4-6%ORGANIC _ WIDTH=16' I RIP-RAP APRON EASEMENT 10-YEAR STORM EVENT: 77.37 CFS 201.98 CFS 30.8 CFS
i' violence o muskrat or beaver Use traps to remove: muskrats
MATTER BY WEIGHT AND HAVE A PH RANGE OF 5.5 TO 7.0. i 1 / 100-YEAR STORM EVENT: 77.37 CFS 201.85 CFS 30.89 CFS activity is present. and consult a professional to CB CB CEP
LENGTH=19 \ (DESIGNED BY OTHERS)i remove beavers.
4. CONTRACTOR SHALL 8E RESPONSIBLE FOR THE WATERING AND THE MAINTENANCE Of ALL LANDSCAPED AREAS � � i' �. A tree has started to grow on Consult a dam safety specialist DESIGN DRAWN CHKD
UNTIL THE LATER OF, (a) THIRTY(30) DAYS FOLLOWING THE PLANTING OF THE GRASS AND SHRUBS, OR (b) _ THICKNESS=24 _ . � / ��� the embankment. to remove: the tree.
THE DATE THAT STORE OPENS FOR BUSINESS TO THE PUBLIC. CONTRACTOR SHALL ALSO BE RESPONSIBILITY RIP RAP CLASS=1 �� i ���� An annual innspection by an make all needed repairs. SCALE H. 1 = 50'
FOR THE SURVIVAL OF THE BMP PLANTING MATERIALS DURING THE TWO-YEAR WARRANTY PERIOD AND SHALL _� - -T _ _. ��� appropriate professional shows V:
REPLACE ALL PLANTS THAT DO NOT SURVIVE AT THE END Of THE FIRST YEAR AND AT THE END OF THE that the embankment needs
SECOND YEAR OF THE WARRANTY PERIOD. GRAPHIC SCALE repair. if applicable)
5. CONTRACTOR TO VERIFY QUANTITIES PRIOR TO COMMENCING WORK. a outlet device Clogging has occurred. can out the outlet OB N0. 220164-01-002
device.
Ois ose of the sediment off-site.
6. ANY DISTURBED AREAS NOT SCHEDULED FOR HARDSCAPE, PLANTINGS, OR MULCH SHALL BE SEEDED LAWN. 50 0 25 50 100 20 The outlet device is damaged Repair or replace the outlet DATE JANUARY 25, 2023
REFER TD SITE PLAN FOR LOCATION OF AREAS TD BE SODDED. I I I I I I device.
7. NO PLANT SUBSTITUTIONS ARE PERMITTED WITHOUT WRITTEN APPROVAL OF THE OWNERS REPRESENTATIVE. PLAN VIEW The receiving water Erosion or other signs of Contact the local NC Division of
B. FOR NEW PLANTING AREAS, REMOVE ALL PAVEMENT, GRAVEL SUB-BASE AND CONSTRUCTION DEBRIS; REMOVE I damage have occurred at the Water Quality Regional Office, or FILE No.
COMPACTED SOIL AND ADD 18" NEW TOPSOIL, OR TILL AND AMEND THE TOP 18' OF EXISTING SOIL TO MEET outlet. the 401 Oversight Unit at
TOPSOIL/PLANTING MIX STANDARDS FOR TREES. ( IN FEET ) STORMWATER MANAGEMENT SYSTEM DETAILS 919-733-1786.
9. ADJUST TREE PLANTING LOCATIONS TO AVOID UNDERGROUND UTILITIES. PLANT 15' FROM ALL UNDERGROUND 1 inch = 50 ft. 1 UTILITIES (SEWER AND STORM DRAINAGE, GAS, WATER, PHONE, AND ELECTRICAL LINES.) NOT TO SCALE S('�V M-4
SHEET
Cad file name: V:\220164 - Stonegate\220164-01-002 (ENG) - Ducks Landing - Darroch Road\Engineering\Engineering Plans\Construction Plans\048-030-SWD.dwg

CONSTRUCTION SEQUENCE top TOP Of STRUCTURE NOT SHOWN FOR CLARITY 4" PVC SCREW CAP RISER STRUCTURE
FOR WET DETENTION POND: �p�R (REMOVABLE TRASH RACK) FOR CLEANING ACCESS
1. INSTALL EROSION CONTROLS. /H
2. CONSTRUCT DAM BASE AND AREAS BELOW THEM�IA
JE
NORMAL POOL. CONSTRUCTION TO BE �c?70,5 EXTEND 4'
PERFORMED UNDER THE INSPECTION OF THE 12" MIN.
PVC
GEOTECHNICAL ENGINEER. SEED UPON
THROUGH
COMPLETION
4' MIN
RISER
3. INSTALL OUTLET PIPE, RIP-RAP APRON AND EMBANKMENT WIDTH STRUCTURE
STONE FILTER RING. 4"x4" PVC TEE
1,0 FT
4. CONSTRUCT OUTLET STRUCTURE 6' TOPSOIL FOR ALL PERM. POND ELEV.=210.0
AREAS ABOVE THE TRASH RACK
5. REMOVE ACCUMULATED SEDIMENT AND SEED NORMAL POND ELEVATION REFER TO DETAIL
UPON COMPLETION. THIS SHEET
24' HOPE WITH WATER TIGHT SEAL I 12" MIN.
PIPE TO BE BEDDED TOP Of EMBANKMENT ELEVATION=215.00
PER DIRECTION OF GEOTECHNICAL 6" TOPSOIL ABOVE NOTE: 1.0" STORM ELEVATION IS 210.07 AND INTERMEDIATE OUTLET CONTROL STRUCTURE - INCREMENTAL WEIR
ENGINEER y 6" CLAY LINER REFER TO DETAIL 100 YEAR STORM ELEVATION=213.88 WEIR IS ELEVATION 210.5. THERE IS ADDITIONAL STORAGE SCALE: N.T.S.DESIGNED FROM THE 1.0" STORM ELEVATION TO THE
ON LITTORAL SHELF FOR INCREMENTAL
6' CLAY SOIL INTERMEDIATE WEIR ELEVATION.
1 LINER ON INSIDE 11 3 WEIR
6" TOPSOIL FOR ALL 2" DIA. HOLE DRILLED
FACE OF 10 YEAR STORM FLEVATION=212.32 AREAS ABOVE THE INTO BOTTOM CAP
EMBANKMENT I 1 NORMAL POND ELEVATION
6 PVC DRAIN OUTLET
44' PRECAST Ui FOREBAY BERM FOREBAY TOP ELEV= 212.0 SCALE N.T.S.
6FT UTTORAL 1 CONCRETE RISER 2 YEAR STORM ELEVATION=211.29 WIDTH AT TOP = 2.0 FT
SHE (INSTALL STEPS
III- AS NECESSARY) 1 YEAR STORM ELEVATION=210.97
6' TOPSOIL ABOVE
6" CLAY LINER 3:1 NOTE: PUMPS SHALL BE USED TO DRAIN
ON LITTORAL SHELF THE FOREBAY WHEN NECESSARY. REFER TO DETAIL
1.0-INCH STORM ELEVATION=210.07 EXISTING GRADE=215.0t SEDIMENT STORAGE THIS SHEET FOR DEWATERING REQUIREMENTS.
INV=210.0 TOP FOREBAY BOTTOM
NORMAL POND ELEVATION=210.00 6FT LITTORAL - ELEV=207.0 3�
PVC ELBOW SHELF 6 NORMAL POND ELEVATION
3' MIN W
SEE DETAL 2 - _ BOTTOM LITTORAL SHELF E ELEV=2O8.0 2 NOTE: PUMPS SHALL BE USED TO ORAIN 1
1 1 THE POND WHEN NECESSARY. REFER TO DETAIL CLASS B RIP-RAP I_
THIS SHEET FOR DEWATERING REQUIREMENTS. OVER FILTER FABRIC
° MIN. 4' GRASS FOREBAY
4' IN. ASTM C-923 SEAL WEIR AT ELEV=209.0 � rn n
KEY BETWEEN BARREL dr RISER. Cz Cc 0 u-) M
RISER BASE TO BE FILLED DS75 MAT UNOERLAYMENT -
CUTOFF TRENCH BOTTOM OF POND (TOP OF SEDIMENT STORAGE)=205.0 o F- N co I= o
WITH CONC. TO INVERT OF AT FOREBAY BERM - I- �
BARREL 6" TOPSOIL FOR ALL t� LLI p CJ O c�
APPROXIMATE SIZE CONCRETE SHALL BE FOREBAY ENTRANCE SHALL BE AREAS ABOVE THE UIr r Z U
EXCAVATE AND BACKFILL 8'X8"XI"X12' LONG ANGLE 6 TOT. REQUIRED TO ANCHOR RISER TO PLACED IN RISER AFTER DEEPER THAN FOREBAY EXIT NORMAL POND ELEVATION CC - rm
( ) ANGLES ARE SECURED (BOTTOM OF SEDIMENT STORAGE)=204.0 � Q _
WITH COMPACTED BASE. PROVIDE 2-3/4" A307 BOLTS FROM ANGLE TO RISER ANG TO BASE AND RISER. - BOTTOM OF SEDIMENT 0 DO [� 0
2-A307 'J' HOOKS 3/4' DIA. X 12' LONG FROM ANGLE TO BASE. STORAGE/EXIT BOTTOM OF SEDIMENT z LU 0 z
STRUCTURAL FILL AS ANGLE TO BE FIELD COATED WITH ZINC RICH PAINT AFTER ELEV=206.5 /
STORAGE ENTRANCE o J c
Cz DIRECTED BY GEOTECHNICAL CONSTRUCTION. 'J"HOOKS TO BE PLACED UNDER LOWER REINFORCING
ELEV=206.0 Q t
ENGINEER STEEL fi" CLAY SOIL m 0
5'x5'x1.5' CONC. BASE REINFORCE WITH #4 BARS AT 12' O.C. TOP LINER FOREBAY ENTRANCE SHALL 8E FOREBAY
DEEPER THAN FOREBAY EXIT
AND BOTTOM OF EACH DIRECTION PROVIDE 3" MIN. CLEARANCE MAIN POOL
21'-24" HOPE 0 2.38% BETWEEN EDGE OF CONC. AND STEEL REINFORCING.
SHALLOW LAND ZONE
HERBACEOUS PLANTS SHALLOW WATER ZONE
PROFILE OF WET POND DETENTION SYSTEM HERBACEOUS PLANTS
SCALE: N.T.S. NOTES
1. SEE DESIGN PLANS FOR SPECIFIED DIMENSIONS OF RISER.
LTER MEDIA (SEE NOTE 2) 2. TRASH RACK DIMENSION CRITERIA SPECIFIED IS APPROXIMATE AND VARIES BY MANUFACTURER. POND
3. INSTALLATION OF TRASH RACK SHALL BE ACCORDING TO MANUFACTURER'S RECOMMENDATIONS. (NORMAL POOL)
SILT FENCE AS NEEDED LIMP 4. ALL COMPONENTS Of TRASH RACK SHALL BE OF STAINLESS STEEL OR OTHER NON-CORROSIVE MATERIAL. I J U
5. ALL MOUNTING HARDWARE SHALL BE OF STAINLESS STEEL OR OTHER NON-CORROSIVE MATERIAL. 6 z
STORMWATER MANAGEMENT NOTES: TRASH RACK Q
. 11 . >
1. THE DEVELOPER OR HIS AGENT SHALL CONTACT THE DESIGN ENGINEER WHEN NON CORROSIVE MATERIAL �r 11 �� 5.5'
THE BEST MANAGEMENT PRACTICE(S) ARE CONSTRUCTED AND ABOUT TO 0 5.5' SPACING , , TYPICAL LITTORAL SHELF VEGETATION DETAIL W z
�0/y BECOME OPERATIONAL SO A FINAL INSPECTION CAN BE PERFORMED TO r I 1
DETERMINE COMPLIANCE WITH THE APPROVED PLAN CAN BE PERFORMED. TRASH RACK rr 11 \\ SCALE: N.T.S Q O
ATER LEVEL 2. ANNUAL MAINTENANCE INSPECTION AND REPORT REQUIRED - THE OWNER OF rrr / 11 ��\ 5.5" (�
CONTROL SHALL ANNUALLY I 1 NURSERY CONTAINER
NOTES: A PERMITTED STRUCTURAL STORMWATER BMP
/ SCIENTIFIC NAME COMMON NAME PLANTING ZONE QUANTITY TYPE SPACING PLANTING SEASON z �
SUBMIT A MAINTENANCE AND INSPECTION REPORT FOR EACH BMP TO THE
1. PRIOR TO INSTALLATION, MANUFACTURER SPECIFICATIONS Of FILTER MEDIA SHALL BE REVIEWED TO STORMWATER ADMINISTRATOR. ANNUAL INSPECTIONS SHALL BEGIN WITHIN - I I I I Jancus effesus Soft Rush SHALLOW WATER 152 PEAT POT 6' O.C. SPRING SUMMER W
ENSURE THAT DISCHARGE FROM FILTER MEDIA SHALL MEET OR EXCEED THE PROVISIONS OF THE CLEAN ONE YEAR OF THE RECORDATION OF ANY DEED(S) SHOWING STORMWATER I I I I I I 5.5" / ~n z
WATER ACT. BMPs/CONTROL STRUCTURES. Iris virginica Blue Flag Iris SHALLOW WATER 152 PEAT POT 6' O.C. SPRING/SUMMER w F--1
2. ENSURE THAT PUMP PRESSURE DOES NOT EXCEED FILTER MEDIA PRESSURE RATING. 3. UPON COMPLETION OF THE PROJECT, AND BEFORE A CERTIFICATE OF 5.5" Q
OCCUPANCY SHALL BE GRANTED, THE ENGINEER OF RECORD SHALL CERTIFY I I
3. FILTER MEDIA MAY BE, BUT NOT LIMITED TO, SAND MEDIA FILTRATION DEVICES, RATED FILTER FABRIC THAT THE COMPLETED PROJECT IS IN ACCORDANCE WITH THE APPROVED Schoenoplectus tabemaemontani Soft Stem Bulrush SHALLOW WATER 152 PEAT POT 6' O.C. SPRING/SUMMER J =
BAGS OR POLYMER BASED DEWATERING PRACTICES. STORMWATER MANAGEMENT PLANS AND DESIGNS. I I NOTE: RISER z
TRASH RACK SHALL BE INSPECTED Eupatoriadelphus maculatus Spotted Trumpetweed SHALLOW WATER 152 PEAT POT 6' O.C. SPRING/SUMMER z 1 Z
4. PUMP STRAINER SHALL NOT BE IN CONTACT WITH BOTTOM OF POND. 4. A FINAL INSPECTION OF THE SITE AND STORMWATER MANAGEMENT I I PERIODICALLY AND ANY DEBRIS ON 1�1
BMP/CONTROLS To BE SCHEDULED WITH AND COMPLETED BY THE PROJECT I I THE TRASH RACK IS TO BE REMOVED Eupatorium purpureum Joe-Pye Weed SHALLOW WATER 152 PEAT POT 6' O.C. SPRING/SUMMER Q
ENGINEER. - AND PROPERLY DISPOSED OF.
BMP POND DEWATERING LOW POINT 5. NCDEQ AND THEIR ASSIGNS HAVE RIGHT TO ACCESS THE STORMWATER Rhynchospora colorato Starrush Whitetop SHALLOW WATER 152 PEAT POT 6' O.C. SPRING/SUMMER �j z
CONTROL(s) FOR INSPECTIONS OR MAINTENANCE AS NECESSARY. RISER RISER TRASH RACK DETAIL
6. THE ENGINEER'S CERTIFICATION OF COMPLETION WILL BE REQUIRED PRIOR ID h--� ::1SEEDBED PREPARATION: THE FINAL PLAT OR CERTIFICATE OF OCCUPANCY. THE STORMWATER TYPICAL LITTORAL SHELF PLANTING SCHEDULE �J
n
1. CHISEL COMPACTED AREAS AND SPREAD TOPSOIL IS TO BE INSPECTED TO ENSURE IT IS FUNCTIONING AS DESIGNED L THREE INCHES DEEP OVER ADVERSE SOIL CONDITIONS, IF AND HAS FULL DESIGN VOLUME PRIOR TO ISSUANCE OF THE FINAL Q F--�1 0
AVAILABLE. CERTIFICATE OF OCCUPANCY. Q
2. RIP THE ENTIRE AREA TO SIX INCHES DEEP. O
3. REMOVE ALL LOOSE ROCK, ROOTS AND OTHER OBSTRUCTIONS, LEAVING SURFACE REASONABLY SMOOTH AND 7. THE PROPERTY OWNER IS RESPONSIBLE FOR MAINTAINING THE STORMWATER C
UNIFORM. COI s) ACCORDING TO THE APPROVED MAINTENANCE PLAN AND
PLYY AGRICULTURAL LIME, FERTILIZER, AND SUPERPHOSPHATE UNIFORMLY AND MIX WITH SOIL DIRECTION
4. AP SEE SEEDING G
( DIRECTIONCTION of NCDEQ. OPERATION & MAINTENANCE _
MIXTURE).5. CONTINUE TILLAGE UNTIL A W V
ELL-PULVERIZED, FIRM, REASONABLY UNIFORM SEEDBED IS PREPARED FOUR To SIX O O
INCHES DEEP. ^� BMP element: Potential problem: How I will remediate the problem
6. SEED ON A FRESHLY PREPARED SEEDBED AND COVER SEED LIGHTLY WITH SEEDING EQUIPMENT OR CULTIPACK a entire BMP Trash debris is present Remove the trash debris
AFTER SEEDING.
7. MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR MULCH. he Perimetera a wet Areas of bare soil and/or Regrade the soil if necessary to Cn
8. INSPECT ALL SEEDED AREAS AND MAKE NECESSARY REPAIRS OR RE-SEEDINGS WITHIN THE PLANTING SEASON, IF STAGE/STORAGE TABLE letention basin erosive gullies have formed remove the gully, and then plant Q
POSSIBLE. If STAND SHOULD BE MORE THAN 60%DAMAGED, RE-ESTABLISH FOLLOWING THE ORIGINAL LIME \ 1 I / ` / r r ` ^J a ground cover and water until it
FERTILIZER AND SEEDING RATES. +-� ` I / / , ( / / / / / / CONTOUR AREA INCREMENTAL TOTAL STORAGE is established. Provide lime and
RIP RAP DISSIPATER / J / / / / / / I STAGE(FT) ELEVATION (FT) ( ) STORAGE (CIF) (CIF) a one-time fertilizer application
4. CONSULT S&ECESTABLISHED.
ENVIRONMENTAL ENGINEERS ON MAINTENANCE TREATMENT AND FERTILIZATION AFTER PERMANENT ( Vegetation is too short or too Maintain Vegetation at a height
COVER IS ESTABLISHED. / PAD #16 - I ` ( / I 0.0 210.0 29905 0 0 long of approximately six inches.
LANDSCAPING NOTES: WIDTH=14' - I / LITORAL SHELF 0.5 210.5 32380 15571 15571 (WQV} a inlet device: pipe or The pipe is dogged. Unclog the pipe. Dispose of the
_ J , wale sediment off-site.
ALL LANDSCAPING SHALL BE IN COMPLIANCE WITH THE NCDEQ BMP REQUIREMENTS. LENGTH=12 / / AREA=3,625 SF 1.0 211.0 33950 16583 32154 a pipe is cracked or Replace the pipe.
THICKNESS=22++ I I REFER TO DETAIL 2.0 212.0 37120 35535 67689 otherwise damerosion is occurring in the egra e e swae i necessary
LANDSCAPE CONTRACTOR SHALL PROVIDE A TWO-YEAR WARRANTY FOR BMP PLANTING SURVIVAL/REPLACEMENT. RIP RAP CLASS-B FOR PLANTINGS 3.0 213.0 40080 38600 106289 swd., to smooth it over and
erosion control device provides such as
AT THE END OF THE FIRST YEAR AND AT THE END OF THE TWO-YEAR WARRANTY PERIOD, ALL PLANTS THAT 00 NOT /' FES / " s I 4.0 214.0 42380 41230 147519 reinforced turf matting or riprap
SURVIVE MUST BE REPLACED. ) ELEV=209.5 / a I SOD AREAS ABOVE 5.0 215.0 44735 43558 191076 to avoid future problems with
erosion.
++ ( I e forebay Sediment has accumulated to Search for the source of the
ESTABLISHMENT PROCEDURES, SUCH AS CONTROLOF INVASIVE WEEDS, ANIMAL AND VANDAL DAMAGE, MULCHING, / 24 OUTLET PIPE NORMAL POOL a depth greater than the sediment and remedy the
RE-STAKING, WATERING, AND MESH OR TUBE PROTECTION REPLACEMENT, SHALL BE IMPLEMENTED TO THE EXTEND \ I or inal design depth for problem if possible. Remove the
NEEDED TO ENSURE PLANT SURVIVAL. STAKING MUST BE REMOVED AFTER ESTABLISHMENT (APPROXIMATELY 12 / REFER TO GRADING / �� I DS75 MAT I EELVATION sediment storage.` ediment ad dispose of it in a IFFei
MONTHS), TO PREVENT GIRDLING (STRANGLING) Of ALL WOODY PLANTS. PLAN / / /) ) �� 1 I UNDERLAYMENT AT ) / I location where it will not cause +rr+�x
/ \ \ im tits to streams or the BMP.
\ FOREBAY BERM I rostOn as oppu . row e a i xMa erosion *� r+++•. +
SOD WITHIN BMP AND SURROUNDING AREAS TO BE BERMUDA OR CENTIPEDE GRASS. / / OUTLET CONTROL DS75 MAT ) I N protection such as reinforced turf �* 4 9 /a
GRASS OR WILDFLOWER SEED MUST BE APPLIED AT THE RATES SPECIFIED BY THE SUPPLIERS. If PLANT STRUCTURE REFER UNDERLAYMENT AT CLASS B I I J matting or riprap if needed to
ESTABLISHMENT CANNOT BE ACHIEVED WITH SEEDING BY THE TIME OF SUBSTANTIAL COMPLETION OF THE STORMWATER / / TO DETAILS ON FOREBAY BERM _ I i / ( revert future erosion problems.b ; F
RIP RAP AT / / ..� Weeds are present Remove the weeds, preferably by
FACILITY PORTION OF THE PROJECT, THEN THE CONTRACTOR SHALL PLANT THE AREA WITH WILDFLOWER SOD, PLUGS, / / THIS SHEET I ( / / / FOREBAY WEIR / I fi STORMWATER MANAGEMENT DESIGN WET DETENTION POND #5: oa hefplants�roor to "�� �t15�
CONTAINER PLANTS, OR OTHER MEANS TO COMPLETE THE SPECIFIED PLANTING AND PROTECT AGAINST EROSION / / 1 / /
BEFORE WATER IS ALLOWED TO ENTER THE STORMWATER BMP FACILITY. / `r / r MAIN POND RIVER BASIN: CAPE FEAR spraying.
)I��
TOP OF � ( � / J ) e vegetated shelf est pro ssiond practK:es rune according � i 1i��'
/ / / / �/ / / / / J RECEIVING STREAM: UPPER LITTLE RIVER t
ALL MATERIALS SHALL BE ACQUIRED FROM AN APPROVED NCDEQ PLANT VENDOR. PLANT MATERIAL SHOULD BE AREA show that pruning is needed professional practices **
/ EMBANKMENT 1� / I LJ Ln STREAM INDEX: 18-20-(B) to maintain optimal plant +# - �•
PURCHASED FROM A LOCAL SOURCE TO ENSURE SURVIVABILITY. LOCAL VENDORS FOR THIS SITE INCLUDE: I I I STREAM CLASS: C health. *'
- GILL IDE NATIVE PLANT NURSERY 919-662-5566 ELEV=215.0 \ o
/ J ( HUG: 0303000402 Plants are dead, diseased or Determine the source of the
- GROWING WILD NURSERY 910-259-6361 \ z / dying. problem: sails, hydrology, disease,
- NC FOREST SERVICE 919-731-7988 - I Y P
- PLANT DELIGHTS NURSERY 919-772-4794 ( 1\\ _ _ - -- �,� PROJECT COORDINATES: 35.316452 N -78.919260'W p P
i�s�I \� ---- -- etc. Reined the problem and
_ r replace loots. Provide a
- TARHEEL NATIVE TREES 919-553-5927 `,� ` `-'fi - - - --- I J / POND DESIGN SUMMARY one-time fertilizer application to
/ �\ \ r - - 1 establish the ground cover if a
DRAINAGE AREA TO POND: 16.11 ACRES so] test indicates it is necessary,
IMMEDIATELY AFTER THE WET DETENTION BASIN IS ESTABLISHED, THE PLANTS ON THE VEGETATED SHELF AND 1 / / r / I I I / SITE IMPERVIOUS AREA TO POND: 3.22 ACRES Weeds are present Remove the weeds, preferably by
PERIMETER OF THE BASIN SHOULD BE WATERED TWICE WEEKLY IF NEEDED UNTIL THE PLANTS BECOME ESTABLISHED r I �l \ �� ' / / _ �i OFF-SITE DESIGN IMPERVIOUS AREA TO POND: 0.0 ACRES hand. If pesticide is used, wipe it
(COMMONLY SIX WEEKS) / / / [1 \ / I J -____-__-- I / / TOTAL DESIGN IMPERVIOUS AREA TO POND: 3.22 ACRES on the pants rather than
FOREBAY AREA \ ( / t �- spraying.
NO PORTION Of THE WET DETENTION POND SHOULD BE FERTILIZED AFTER THE FIRST INITIAL FERTILIZATION THAT IS ( / / - / e main treatment area Sediment has accumulated to Search for the source of the PLAN STATUS
REQUIRED TO ESTABLISH THE PLANTS ON THE VEGETATED SHELF. / / \ / / PRE-DEVELOPED POST-DEVELOPED POST DEVELOPED a depth greater than the sediment and remedy the
�U INLET PIPE WITH / TO POND TO POND THROUGH POND original design sediment problem if possible. Remove the 01/25/23 INITIAL SUBMISSION
LANDSCAPING NOTES: / / / / storage depth. sediment and dispose of it in a
/ RIP-RAP APRON ,%' DRAINAGE AREA: 69.1 AC 16.11 AC Impacts where it will not cause 05/16/23 2ND SUBMISSION
-/-�-'F'�--�� CURVE NUMBER: 69.1 76.1 impacts to streams or the BMP.
1. CONTRACTOR SHALL COMPLY WITH ALL APPLICABLE CODES AND ORDINANCES REGARDING LANDSCAPING. I ( (DESIGNED BY OTHERS) J TIME OF CONCENTRATION: 20.0 MIN 5.0 MIN Algal growth covers over Consult-a pro essional to remove 07/05/23 3RD SUBMISSION
2. IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO ESTABLISH A HEALTHY STAND OF GRASS ON ALL SEEDED - of the area. and control the algal growth.
AREAS. - / ttals, phragmites Or other Remove the plants b wiping
3. CONTRACTOR SHALL PROVIDE NATURAL TOPSOIL THAT IS FERTILE, FRIABLE, WITHOUT MIXTURE OF SUBSOIL J r STORMWATER ( I ` - - RIP RAP DISSIPATER 1.0" STORM EVENT: 0.212 CFS 0.008 CFS invasive plants cover 50%of them with pesticide Ido no
MATERIALS, AND OBTAINED FROM A WELL GRAINED, AVAILABLE SITE. IT SHALL NOT CONTAIN SUBSTANCES I I / 1-YEAR STORM EVENT: 10.10 CFS 28.89 CFS 1.149 CFS the basin surface. s ra
WHICH MAY BE HARMFUL TO PLANT GROWTH. TOPSOIL SHALL BE SCREENED AND FREE FROM CLAY, LUMPS, / MANAGEMENT / PAD #12 + e embankment Shrubs have started to grow emove shrubs immediately.
/ 2-YEAR STORM EVENT: 16.68 CFS 41.57 CFS 2.357 CFS DATE DESCRIPTION
STONES, ROOTS, PLANTS, OR SIMILAR SUBSTANCES 1" OR MORE IN DIAMETER, DEBRIS, OR OTHER OBJECTS ( EASEMENT WIDTH=16 10-YEAR STORM EVENT: 37.56 CFS 79.31 CFS 7.448 CFS on the embankment
WHICH MIGHT BE A HINDERANCE TO PLANTING OPERATIONS. TOPSOIL SHALL CONTAIN AT LEAST 4-6%ORGANIC / Evidence o muskrat or beaver Use traps to remove muskrats
/ \ I S LENGTH=19 100-YEAR STORM EVENT: 76.36 CFS 144.34 CFS 25.48 CFS activity is present. and consult a professional to CB CB CEP
MATTER BY WEIGHT AND HAVE A PH RANGE OF 5.5 TO 7.0. I ( / r / u I " remove beavers.
4. CONTRACTOR SHALL BE RESPONSIBLE FOR THE WATERING AND THE MAINTENANCE Of ALL LANDSCAPED AREAS / / j 1 I THICKNESS=24 / A tree has started to grow on Consult a dam safety specialist DESIGN DRAWN CHKD
UNTIL THE LATER OF; (a) THIRTY(30) DAYS FOLLOWING THE PLANTING OF THE GRASS AND SHRUBS, OR (b) / / / ` �� - -' the embankment. to remove: the tree.
RIP RAP CLASS=1
THE DATE THAT STORE OPENS FOR BUSINESS TO THE PUBLIC. CONTRACTOR SHALL ALSO BE RESPONSIBILITY / / I �7 y An annual innspectilon by an Make all needed repairs. SCALE H• 1 = 50'
FOR THE SURVIVAL OF THE BMP PLANTING MATERIALS DURING THE TWO-YEAR WARRANTY PERIOD AND SHALL �1 .� i _ 1 _4 �/' / -_ approp e e professional shows V:
REPLACE ALL PLANTS THAT DO NOT SURVIVE AT THE END Of THE FIRST YEAR AND AT THE END OF THE that the embankment needs
SECOND YEAR OF THE WARRANTY PERIOD. GRAPHIC SCALE a outlet device C Clo air.in if a has oc( ppcurred. can out the outlet device. OB N0. 220164-01-002
5. CONTRACTOR TO VERIFY QUANTITIES PRIOR TO COMMENCING WORK. ggg .
Dispose of the sediment off-site.
6. ANY DISTURBED AREAS NOT SCHEDULED FOR HARDSCAPE, PLANTINGS, OR MULCH SHALL BE SEEDED LAWN. 50 0 25 50 100 20 The outlet device is damaged Repair or replace the outletDATE JANUARY 25, 2023
REFER ID SITE PLAN FOR LOCATION OF AREAS ID BE SODDED. device
7. NO PLANT SUBSTITUTIONS ARE PERMITTED WITHOUT WRITTEN APPROVAL OF THE OWNERS REPRESENTATIVE. PLAN VIEW 1he receiving water Erosion or other signs of Contact the local NC Division of
B. FOR NEW PLANTING AREAS, REMOVE ALL PAVEMENT, GRAVEL SUB-BASE AND CONSTRUCTION DEBRIS REMOVE damage have occurred at the Water Quality Regional Office, or FILE N0.
COMPACTED SOIL AND ADD 18" NEW TOPSOIL, OR TILL AND AMEND THE TOP 18' OF EXISTING SOIL TO MEET outet. the 401 Oversight Unit at
TOPSOIL/PLANTING MIX STANDARDS FOR TREES. ( IN FEET ) STORMWATER MANAGEMENT SYSTEM DETAILS 919-733-1786.
9. ADJUST TREE PLANTING LOCATIONS TO AVOID UNDERGROUND UTILITIES. PLANT 15' FROM ALL UNDERGROUND 1 inch = 50 ft. 1 UTILITIES (SEWER AND STORM DRAINAGE, GAS, WATER, PHONE, AND ELECTRICAL LINES.) NOT TO SCALE S('�V M-5
SHEET
Cad file name: V:\220164 - Stonegate\220164-01-002 (ENG) - Ducks Landing - Darroch Road\Engineering\Engineering Plans\Construction Plans\048-030-SWD.dwg