20200090 Ver 1_2020-02-21 WMMS Impact Area Sheet Set_20200302

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APPUCANT INFORMATION
ON"m RARE COWTY BOARD OF EDUCARION
OIFR CONTACT, WERY SFERRl1
16110E o01R11Y F11 w Mims
1429 ROM ODARRY ROAD
RALEW RC 2MO
OFRM 910-5OB OM
FA1G 910-856-8172
NOTE -
TOTAL WETLANDS ON -SITE: 0.061 ACRES
TOTAL WETLANDS IMPACTED ON -SITE: 0.01 ACRES
TOTAL LINEAR FEET OF STREAM ON -SITE: 1,093 LF
TOTAL LINEAR FEET OF STREAM IMPACTED ON -SITE: 149 LF
TOTAL SQUARE FEET OF STREAM IMPACTED ON -SITE: 1,866 SF
IMPERVIOUS AREA FOR PROPOSED PROJECT., 13.90 ACRES
THIS PROPERTY IS LOCATED ZONE "X," AREAS DETERMINED TO BE
OUTSIDE THE 0.2% ANNUAL CHANCE FLOOD PLAIN AS SHOWN ON
FIRM PANEL 0725, MAP NUMBER 3720170700J WITH AN EFFEC77VE
DATE OF MAY 2, 2006.
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CONDITIONS
PLAN

IMPACT LEGEND
TYPE IMPACT �\
DELINEATION \
RIP RAP FILL \
)� LIMITS 6F E
PROPOSED CULVERT ���-'►'�G
IMPACT TABLE
Impact
Location
Impact
Feature
Impact
Type
Impact
Purpose
Impact
Amount
Permanent Loss
Impact Amount
Project
Impact (sq ft)
Impact Area #1
Stream
Permanent
Culvert
30 LF
30 LF
30'xT=90 SF
Impact Area #1
Stream
Permanent
Rip Rap
40 LF
0
40'x3'=120 SF
Impact Area #1
Stream
Existing
Culvert
0 LF
0
0
Totals:
70 LF
30 LF
210 SF
40
GRAPHIC SCALE
20 40 80
( IN FEET )
1 inch = 40 ft.
160
to •
VENT STREAM WACr,
XT 014r RQr 30 LF
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PERMAN dT OUTLET
�¢>>. PROTECTION
rL* aASS B STOW —
RP RAP TO BE BUR® AT
GRADE
— — RID 1 �� \ \ TWAL wETiAND
J WACT AREA •
I \ 00 SF. MM AO �
IMPACT LEGEND
TYPE
IMPACT
DE LINEATION
WETLAND
W W
W W W W W
W W W W
W W W W W
COFFER DAM
RIP RAP FILL
o 0 0
PROPOSED CULVERT
EXISTING CULVERT
0
I
UMNG STREAM WPACT,
ULVERT 30• RCP ■ "LF
IMPACT TABLE
Impact
Location
Impact
Feature
Impact
Type
Impact
Purpose
Impact
Amount
Permanent Loss
Impact Amount
Project
Impact (sq ft)
Impact Area#2
Wetland
Permanent
Fill
0.01AC
0.01AC
450SF
Impact Area #2
Stream
Permanent
Culvert
190 LF
190 LF
190'x3.5'=665SF
Impact Area#2
Stream
Permanent
Rip Rap
32LF
0
32x3.5=112SF
Impact Area #2
Stream
Temporary
Coffer Dam
S LF
0
0
Impact Area #2
Stream
Existing
Culvert
SO LF
0
0
Totals:
1 150 LF
110 LF
1227 SF
IMPACT MAP #2
GRAPHIC SCALE
40 0 20 40 80
( IN FEET )
1 inch = 40 ft.
160
TEMPORARY N�PACf, � �
OOFiBt DAM ■ 8 LF �
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o
POWA ENT STREAM IMPACT,
O� CLAWERT 03 48' RCP ■ 50 LF
i L
OUTLETTION ■ 40 LFTO BE BURSDE
E ffnNG RIP RAP OUTLET /
PROTECTION = 30 LF /
RIP RAP TO BE BURIED AT
GRAD
402�-� \
�.�11!In■�'A LOA
-
LEGEND
TYPE
IMPACT
DELINEATION
COFFER DAM
RIP RAP FILL
)o O O
PROPOSED CULVERT
EXISTING CULVERT
IMPACT MAP #3
LIMITS OF DISTURBANCE �\
AREA NOT IMPACTED \
T*OF STREAM BAK
f—
410
STREAM IMPACT,
Is BLF
I
IMPACT TABLE
NOW
J
416
— _ F --FP Fes—
W — W / W =.--Vi
Impact
Location
Impact
Feature
Impact
Type
Impact
Purpose
Impact
Amount
Permanent Loss
Impact Amount
Project
Impact (sq ft)
Impact Area #3
Stream
Permanent
Culvert
50 LF
50 LF
50'x5'=250SF
Impact Area #3
Stream
Existing
Rip Rap
30 LF
0
0
Impact Area #3
Stream
Temporary
Coffer Dam
8 LF
0
0
Impact Area #3
Stream
Permanent
Rip Rap
40 LF
0
40'x5'=200SF
Impact Area #3
Stream
Existing
Culvert
60 LF
0
0
Totals:
8 LF
0 LF
450 SF
GRAPHIC SCALE
40 0 20 40 80
( IN FEET )
1 inch = 40 ft.
160
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IMPACT LEGEND
TYPE
IMPACT
DE INEA ION
WETLAND
W W W W
W W W W W
W W W W
W W W W W
EXISTING CULVERT
— — — —
I 1I I/ / 1 6E RALEIGH
------ TOP OF STREAM I&Al `� 1 I 1 I I I 1 1 I i I GREENW Y EASA
RALEIGH
CEMENT EASEMENT\\ �,
F�V
AS
I \ \ EA \
\I
\ I I
STREAM /
—1�
EXISTING STREAM IMPACT (� � \ CENTERLINE �
24" RCP CULVERT & CMP \III
-rVNST-RjC_ I ' RISER =114 LF 1 I I I \— _�"�' .�,��
' -- // /� \—•.� � / � � �� � � `�i — �� ��� .mac = �
71
—
FP FP �e -- I \�1�j �r�s ��� 415
I —_\ W / W,-- � -- W
IMPACT TABLE
Impact
Location
Impact
Feature
Impact
Type
Impact
Purpose
Impact
Amount
Permanent Loss
Impact Amount
Project
Impact (sq ft)
Impact Area #4
Stream
Existing
Culvert
114 LF
0
114'x4'=456 SF
Totals:
114 LF
0 LF
456 SF
40
20
IMPACT MAP #4
GRAPHIC SCALE
40 80
( IN FEET )
1 inch = 40 ft.
160
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CLASS 2 RIPRAP
DISSIPATOR:
40'Lx12'Wx33"TH
30 LF 48" RCP
CULVERT
�7
IMPACT AREA # 1 - CULVERT I PLAN
40
GRAPHIC SCALE
20 40 80
( IN FEET )
1 inch = 40 ft.
HORIZONTAL: 1"=40'
VERTICAL• 1"=4'
435
000i
425
420
415
Uroj
FINISH
RE
MING
L
WA
30 LF 48" RCP
CULVERT @ 2.25%
SLOPE
FG ELEV: 414.
0'
13.00'
OUTLET PROTECTION SHALL BE
INSTALLED SUCH THAT RIPRAP
IS FLUSH WITH EXISTING
GRADE. SEE DETAIL.
CLASS 2 RIPRAP DISSIPA TOR
40'Lx l2'Wx33 "TH
EXISTING
GRADE
10+00
160
CULVERT I PROFILE
11 +00
435
«fol
425
420
415
410
11 +50
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_ _ \ \ CLASS 1 RIPRAP
\ DISSIPATOR:
COFFEE 32'Lx 12'Wx27"TH
AM00 \ —
•
I
.
, RCP
HEADWALL
430
425
rNol
415
410
405
IMPACT AREA #2 - CULVERT 2 PLAN
40
OUTLET PROTECTION SHALL BE
INSTALLED SUCH THAT RIPRAP
IS FLUSH WITH EXISTING
GRADE. SEE DETAIL.
CLASS 1 RIPRAP DISSIPA TOR
32Lx12'Wx27"TH
HEADWALL
FINISH
GRADE
ALL
TEMPORARY,,
EXISTING
GRADE
_ —
COFFER
DAM
FG ELEV:
INVERT IN.
I
12.0'
411.00'
183 LF 48" RCP
CULVERT &
HEADWALL@ 1.09% --
SLOPE
FG ELEV. 410.00'
INVERT OUT: 409.0
CULVERT 2 PROFILE
'
w
10+00
11 +00
12+00
GRAPHIC SCALE
0 20 40 80
430
425
.pzfj
415
410
405
13+00
( IN FEET )
1 inch = 40 ft.
HORIZONTAL: 1"=40'
VERTICAL- 1"=4'
160
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410
405
0010i
395
390
zo,
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/ J�� �� 40'Lx 12'Wx33 "TH
Old —
RETAINING
GO
ORARY —
COFFER 50 L F 48" RCP
\\ DA41 /�\ CULVERT//--
IMPACT AREA #3 - CULVERT 3 PLAN
FINISH
E
WALL
OUTLET PROTECTION SHALL BE
INSTALLED SUCH THAT RIPRAP
IS FLUSH WITH EXISTING
EXISTING GRADE. SEE DETAIL.
7Z4RADE CLASS 2 RIPRAP DISSIPA TOR
40'Lx 12'Wx33 "TH
RETAINING
TEMPORARY,
COFFER
PAM—
V
\
_ � I
FG EL
EV:399.0'
INVERT
IN: 398.35'
50 LF 48" RCP
CULVERT @ 1.18%
SLOPE
CULVERT 3 PROFILE
FG ELEV. • 398.0'
INVERT OUT. 397.76'
10+00
11 +00
12+00
415
410
405
08181
395
390
12+50
20 GRAPHIC SCALE
( IN FEET )
1 inch = 40 ft.
HORIZONTAL: 1"=40'
VERTICAL- 1"=4'
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ETING
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RISER
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EXISTING 24" I I I I I I I 1111 j l f
RCP CULVERT I i i I II 1111111� X���\
I �
IMPACT AREA > 4 - CUL VERT 4 PLAN
425
rlpzo]
415
410
405
DOW
GRAPHIC SCALE
40 0 20 40 80
( IN FEET )
1 inch = 40 ft.
HORIZONTAL: 1"=40'
VERTICAL- 1"=4'
EXISTING
/
GRADE
CMP
i
TOP: 414.20'
INVERT IS NOT AC
I F1
ESSIBLE
ASSUMED INVERT-N.-
114 LF EXISTING
24"RCP CULVERT
02.5% SLOPE
IL
INVERT OUT. 404.14'-
10+00 11 +00
CULVERT 4 PROFILE
160
425
EPA
415
410
405
12+00 0
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00000
PLAN
SECTION A —A (AMOCO 2006
8
(OUTLET TO FLAT AREA WITH NO WELL DEFINED CHANNEL) OR EQUIVALENT)
FILTER BLANKET
L
TYPE STONE
o
B o0o 000°o
O� J 0p 0 oop °o � o C)
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TEMPORARY COFFER DAM DETAIL N. T.S
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SECTION B—B FILTER BLANKET
00 o0 0 0
(AMOCO 2006
OR EQUIVALENT)
PLAN
(OUTLET TO WELL DEFINED CHANNEL)
NOTES:
1. TOP OF RIP RAP AT DOWNSTREAM END OF APRON SHALL BE FLUSH WITH
NATURAL GRADE OF THE RECEIVING CHANNEL.
MAINTENANCE NOTES:
2. INSTALL OUTLET PROTECTION IMMEDIATELY AFTER INSTALLATION OF PIPE.
.J
1. RIP RAP OUTLET STRUCTURES TO BE INSPECTED WEEKLY AND AFTER
EVERY RAINFALL EVENT. 3. SEE GRADING PLAN FOR PERMANENT OUTLET PROTECTION DIMENSIONS. SEE
J
O
2. REPAIR DISLODGED STONES TO DESIGN DIMENSIONS IMMEDIATELY.
EROSION CONTROL PLAN FOR TEMPORARY OUTLET PROTECTION DIMENSIONS.
O
J. IF MORE SUBSTANTIAL DAMAGE OCCURS, NOTIFY ENGINEER TO
=
W
DETERMINE A REPAIR SOLUTION.
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