20200564 Ver 1_JNX Permit Impact Exhibits_20200423

PR. 48"
L i/
92
15F�
PR. 54" RCP
14150
8 / I
j/#�\ \\
STREAM AN
BUFFER IMPACTS
SEE SHEET 2�
GRAPHIC SCALE
100 0 50 100 \ \
i
IN FEET
1 inch = 100 rc.
© WSP USA INC. ALL RIGHTS ARE RESERVED. ANY POSSESSION. REPRODUCTION OR OTHER USE OF THIS DOCUMENT WITHOUT PRIOR PERMISSION FROM WSP, IS EXPRESSLY PROHIBITED.
OQECT�
20
c `RAWNBY. GATE 0411BY AK Johnston Regional Airport
p DRAWNBY JWB CHECKED BV'. AK "
S TITLE Drainage Improvements
s Project
Overview
Smithfield, NC 434 Fayetteville St
� SHEET Suite 1500
o Raleigh, INC 27601
of 3 Johnston Regional Airport Authority
3149 Swift Creek Rd [phone]
a wsp.com

i
— — — — — — — TEMPORARY STREAM IMPACT (ACCESS)
PERMANENT STREAM IMPACT (BED AND
BANK STABILIZATION) /
PERMANENT BUFFER IMPACT (ZONE 1)
+ + + + TEMPORARY BUFFER IMPACT (ZONE 1) /
TEMPORARY BUFFER IMPACT (ZONE 2)
EXISTING FACILITY LINE / * \� z m
EXISTING STREAM BUFFER (ZONE 1) .00
m z
EXISTING STREAM BUFFER (ZONE 2) /
m Z
PERMANENT STREAM IMPACTS
APPROX 31 LF - 188 SF _ \ � / \
EXISTING FACILITY LINE
— EXTENTS OF IMPACTS
/ 20' BUFFER
ZONE2
x \ \ \ TEMPORARY BUFFER
+ X x X \ \ IMPACTS (ZONE 1)
X // x x X) x \ \ APPROX 1,054 SF
/ +x XX X X 4 x
\
, x/ x/x x x x1 I x /
/ /
+ x x x x x x x x x /
/ +ERMANENT BUFFER
+ x x X X X IMPACTS (ZONE 1)
/ x X x X/ x
APPROX 712 SF
/ + + / + x x x x/ x
TEMPORARY BUFFER + / + / 1
IMPACTS (ZONE 2) +
APPROX 71 SF + /
4 / TEMPORARY STREAM IMPACTS
APPROX 13 LF - 59 SF
IMPACT SUMMARY
TEMPORARY PERMANENT I �/ / STREAM SA
STREAM 13 31
1
IMPACTS [LF] 0' UFF�R EXISTING TOBSTREAM
IMPACTS [SF] 59 188 / ONE
ZONE 1 BUFFER 1,054 712
IMPACTS [SF] O'BIFER
ZONE 2 BUFFER / � �
IMPACTS [SF] 71 0 / / 7/ON S 1 &
NOTE: THERE ARE NO PERMANENT BUFFER//
IMPACTS IN ZONE 2
GRAPHIC SCALE
zo 0 10 zo
(INS)
I inch - 20 & NOTE: RIPRAP PATTERN TURNED OFF FOR CLARITY. RIPRAP EXTENTS CORRESPOND TO THE LIMITS OF THE
PERMANENT IMPACTS.
© WSP USA INC. ALL RIGHTS ARE RESERVED. ANY POSSESSION, REPRODUCTION OR OTHER USE OF THIS DOCUMENT WITHOUT PRIOR PERMISSION FROM WSP, IS EXPRESSLY PROHIBITED.
PROJECT». DATE.04,BV' 20
DRAWNBY JWB CHECKED 1BY0AK
Johnston Regional Airport
'. . NN
TITLE
Stream & Buffer Impact Exhibit Drainage Improvements
Smithfield, NC 434 Fayetteville St
Suite 1500
SHEET
Johnston Regional Airport Authority Raleigh, INC 27601
2 of 3
3149 Swift Creek Rd [phone]
WSp.c0m

NOTES:
1. CLASS OR MEDIAN SIZE OF RIPRAP AND LENGTH, WIDTH AND DEPTH OF APRON TO BE
DESIGNED BY THE ENGINEER.
2. REFER TO THE NCDEQ EROSION AND SEDIMENT CONTROL DESIGN MANUAL FOR RIPRAP
APRON DESIGN STANDARDS.
3. RIPRAP SHOULD EXTEND UP BOTH SIDES OF THE APRON AND AROUND THE END OF THE
PIPE OR CULVERT AT THE DISCHARGE OUTLET AT A MAXIMUM SLOPE OF 2:1 AND A
HEIGHT NOT LESS THAN TWO THIRDS THE PIPE DIAMETER OR CULVERT HEIGHT.
4. THERE SHALL BE NO OVERFLOW FROM THE END OF THE APRON TO THE SURFACE OF THE
RECEIVING CHANNEL. THE AREA TO BE PAVED OR RIPRAPPED SHALL BE UNDERCUT SO
THAT THE INVERT OF THE APRON SHALL BE AT THE SAME GRADE (FLUSH) WITH THE
SURFACE OF THE RECEMNG CHANNEL. THE APRON SHALL HAVE A CUTOFF OR TOE WALL
AT THE DOWNSTREAM END.
5. THE WIDTH OF THE END OF THE APRON SHALL BE EQUAL TO THE BOTTOM WIDTH OF THE
RECEIVING CHANNEL. MAXIMUM TAPER TO RECEIVING CHANNEL 5:1.
6. ALL SUBGRADE FOR STRUCTURE TO BE COMPACTED TO 95% OR GREATER.
7. THE PLACING OF FILL, EITHER LOOSE OR COMPACTED IN THE RECEIVING CHANNEL SHALL
NOT BE ALLOWED.
8. NO BENDS OR CURVES IN THE HORIZONTAL ALIGNMENT OF THE APRON WILL BE PERMITTED.
9. FILTER FABRIC SHALL BE INSTALLED ON COMPACTED SUBGRADE PRIOR TO PLACEMENT OF
RIP RAP.
10. ANY DISTURBED AREA FROM END OF APRON TO RECIEVING CHANNEL MUST BE STABILIZED.
RIP RAP SUMMARY CHART
OUTLET
La
W1
W2
T*
H
HWA
29'
33.5'
20'
2.25'
3
* d50 (see fig 8.06 ahb 'NC SEDIMENT AND EROSION CONTROL MANUAL'
dmax = 1.5 x d50
T = 1.5 X dmax.
L
•F
% SLOPE
"' - • • O LO I.�IMIN
- 1 •
FILTER FABRIC LAP
(IF NEEDED)
ELEVATION
NATURA- GRADE
lap
SECTIONNOTE: LAYER OF ALTER FABRII
MINIMUM H-2/3 PIPE DmETER
1\41=10 l=02\161M IMMIK�INIM O
© WSP USA INC. ALL RIGHTS ARE RESERVED. ANY POSSESSION, REPRODUCTION OR OTHER USE OF THIS DOCUMENT WITHOUT PRIOR PERMISSION FROM WSP, IS EXPRESSLY PROHIBITED
DRAWN
DAKK0.Sy:A1 Johnston Regional Airport N x
DRAWN BY: JWB CHECKED BY: AK
% I )
TITLE
6 Proposed Stabilization Drainage Improvements
Detail Smithfield, NC 434 Fayetteville St
Suite 1500
SHEET
a Regional Airport Authority Raleigh, NC 27601
3 of 3 Johnston R
3149 Swift Creek Rd [phone]
WSP.Com