SW1240603_Stormwater Report_20240830

STORMWATER MANAGEMENT REPORT
FOR
ASHEVILLE REGIONAL AIRPORT
ATCT AND TRACON PROJECT
FLETCHER, NORTH CAROLINA
r�.
y <
F .
INITIAL SUBMITTAL: MAY 2024
\����\1111 II /
CA
�NEs R %'.
STORMWATER ENGINEER: �'.
AULICK ENGINEERING, LLC = SEAL
DAVID A.SKURKY, P.E. 040195
600 PARK OFFICES DRIVE,SUITE 30009 Fiy�INEE'Sk ��\.��
DURHAM, NC 27709 �.,�!�j•'' v�\�.
S
1 T Wsform8[�g
AV ON ON 4
i•nit•q ULICK ENGINEERING, LLC
- '• ;ty HYDRAULICS&HYDROLOGY I EROSION CONTROL
• AIRFIELD DESIGN I CONSTRUCTION MANAGEMENT&INSPECTION

TABLE OF CONTENTS
Section 1 PROJECT OVERVIEW
1.1 Narrative 3
1.2 Introduction and Site Description 3
1.3 Construction Sequence and Cost 3
Section 2 HYDROLOGY
2.1 Project Methodology 4
2.2 Drainage and Erosion Control Design 6
2.3 Operation and Maintenance Manual 6
2.4 Design Software and Manuals 6
Appendices REFERENCE MATERIAL
Appendix A- Vicinity, Soil Survey, FEMA Maps, and NOAA Rainfall Data
Appendix B- Airport Layout Plan (ALP)
Appendix C- Stormwater Sheets& Details, Landscape Plan
Appendix D- Operation and Maintenance Manual
Appendix E- Supplemental EZ Storm
Appendix F- BUA Exhibit
Appendix G - Environmental Assessment—Wetland Section

Section 1 PROJECT OVERVIEW
1.1 Narrative
The Greater Asheville Regional Airport Authority ATCT and TRACON project includes the construction
of a perimeter road, a new parking lot, a TRACON building, and associated grading, drainage,
landscaping, and erosion control.
This report includes the computations that show compliance with the NCDEQ High-Density Project.A
Primary SCM (Bioretention cell) will be used to treat the stormwater runoff from the proposed site.
1.2 Introduction and Site Description
The site is located at Greater Asheville Regional Airport in Fletcher, NC, south of Asheville, North
Carolina near Airport Road(35°26' 17.43" N,82°32'
13.40"W).
The area that includes airport-related operations
encompasses approximately 580 acres. For a larger
vicinity map,see Appendix A. The Greater Asheville
Regional Airport Authority ATCT and TRACON Asheville
project site is located on an undeveloped area in Regional
the western portion of the airport, located at the Airport
end of Westfeldt Drive. f
For hydrologic planning purposes, the site is
comprised of Hydrologic Soil Group (HSG) B soils.
Appendix A contains the NRCS Soil Survey Maps for
the parking lot.The existing land use of the project
is grass,gravel,forest,and impervious.The proposed land use is impervious(perimeter road,TRACON
building, and parking lot) with some grassed area for landscaping and bioretention.
As shown in FEMA FIRM 3700964300K(January 6, 2010) in Appendix A,the disturbance is not located
within 200ft of a FEMA floodplain.
1.3 Construction Sequence and Cost
As explained later in the report, a bioretention cell is proposed as a primary stormwater conveyance
measure (SCM). The rough outline of the permanent bioretention area will occur during the grading
phase of the project and a portion of it will be used as a temporary sediment trap to protect
downstream receiving stormwater systems from construction activity.After the site is stabilized, the
sediment trap will be cleaned out and re-graded to final bioretention design grades. No mechanical
stabilization will occur. The cost of the bioretention cell is unknown at this time and will be finalized
during bidding. The Asheville Regional Airport will be the end-user and responsible for annual
inspection, maintenance, and repairs of the system. Section 2.3 discusses the operation and
maintenance of the cell.
3
ASHEVILLE REGIONAL AIRPORT-ATCT AND TRACON PROJECT INITIAL SUBMITTAL:MAY 2024
STORMWATER MANAGEMENT REPORT

Section 2 HYDROLOGY
2.1 Project Methodology
In order to qualify for a primary Stormwater Conveyance Measure (SCM) for Bioretention, several
minimum design criteria (MDC) must be met.The recommendations will also be met to the maximum
extent practical.
MDC 1 Separation from the SHWT
Boring logs for the project area observed SHWT 7ft to 10ft below the existing grade surface. The
lowest point of the bioretention cell will be a minimum of two feet above the SHWT.
MDC 2 Maximum Ponding Depth for Design Volume
The maximum ponding depth for the bioretention cell is 12 inches.
MDC 3 Peak Attenuation Volume
The maximum depth of the entire cell is 18 inches for peak attenuation. See plans with outlet
control structure weirs at 12-inch and 18-inch depths.
MDC 4 Underdrain
An underdrain with internal water storage is designed. See the plan view on SW-01 and details
on SW-02 and SW-03 showing the underdrain location and details.
MDC 5 Media Depth
The media depth is 36 inches, see detail on SW-02 showing media depth.
MDC 6 Media Mix
The media shall be a homogeneous soil mix engineered media blend with approximate volumes
of:
(a) 75 to 85 percent medium to coarse washed sand (ASTM C33,AASHTO M 6/M 80,
ASTM C330,AASHTO M195, or the equivalent)
(b) 8 to 15 percent fines (silt and clay); and
(c) 5 to 10 percent organic matter (such as pine bark fines).
See detail on SW-02 showing media mix.
MDC 7 Media P-Index
The phosphorus index(P-index) for the media shall not exceed 30 in NSW waters as defined in
15A NCAC 02B .0202 and shall not exceed 50 elsewhere.
MDC 8 No Mechanical Compaction
The media shall not be mechanically compacted. It is recommended to either water it or walk on
it as it is placed.This note is on the detail, sheet SW-02.
4
ASHEVILLE REGIONAL AIRPORT-ATCT AND TRACON PROJECT INITIAL SUBMITTAL:MAY 2024
STORMWATER MANAGEMENT REPORT

MDC 9 Maintenance of Media
The bioretention cell shall be maintained in a manner that results in a drawdown of at least one
inch per hour at the planting surface. This is accomplished by not installing until the end of the
project phase, installing the correct soil type as outlined above,and not mechanically compacting.
MDC 10 Planting Plan
A planting plan can be found in Appendix C2 by Landart.
MDC 11 Mulch
Water will enter the bioretention at less than 3 fps (see Recommendation 1 narrative below).
Therefore, sod is proposed in the bioretention area.
MDC 12 Clean-Out Pipes
A minimum of one clean-out pipe shall be provided on each underdrain line.Clean-out pipes shall
be capped. As seen on the plan and details, sheets SW-01 through SW-03, a cleanout is provided
in the bioretention cell.
Recommendation 1 Dispersed Flow or Energy Dissipation
The parking lot, building, and associated impervious runoff will enter the bioretention via pipe
flow into two proposed forebays.The forebays are flat settling areas with spillways to spread the
flow evenly into the bioretention portion, at an outlet velocity of less than 3 fps.
Recommendation 2 Pretreatment
The parking lot, building, and associated impervious runoff will enter the bioretention via pipe
flow into a proposed forebay. The forebay will be 18 inches deep.
The Rational Method was used for the parking lot design on the development.The Intensity Duration
Frequency(IDF) curve for Fletcher, NC below was used for the calculations:
mac•
21_00 21.00 1st Yr
1s-00
15_00 \ - - _ 15.00 25 Yt
1200 12 00 1 Lri
9.00 9.00 yri
6m 6_00 n
3m 3.00
OAO I I I 10 00
0 5 10 15 20 25 30 35 40 45 50 55 60
Tie(moo)
5
ASHEVILLE REGIONAL AIRPORT-ATCT AND TRACON PROJECT INITIAL SUBMITTAL:MAY 2024
STORMWATER MANAGEMENT REPORT

The following runoff coefficients were also used for hydraulic (storm inlet, pipe) analysis of this
project:
c=0.30 (Grass, HSG B)
c=0.95 (Impervious area)
The bioretention was designed to treat a total of 6.13 acres. See below for volume calculations, the
proposed bioretention cell will provide adequate volume per the tables below:
Design Volume-Required
Drainage Impervious Rv RD(Design Design Volume
Area Area IA(Impervious Fraction) (0.05*0.9 Storm Depth) (3630*RD*Rv*A)
(ac) (ac) *IA) (in) (cf)
Bioretention 1 6.13 1.12 0.18 0.21 1.0 4,772
Design Volume-Provided
Design Volume Surface Area Surface Area Design Volume
Depth Provided
Required (ft) Required Provided Provided
(cf) (sf) (sf) (cf)
Bioretention 1 4,772 1.0 4,772 5,899.0 7,251
2.2 Drainage & Erosion Control Design
On the northeastern side of the project area, 54" RCP is proposed in the ditch on the southwest side
of the existing gravel road. The 54" RCP line continues south along the ditch and eventually turns
south under Perimeter Road after the proposed Westfeldt round-a-bout. 15" and 18" RCP systems
are proposed along the eastern side of Perimeter Road and west of the proposed building and parking
area. Each of the lines collects water via curb inlets and travels south. At the southeastern corner of
the parking lot, the 18" eastern line turns west and outfalls into the bioretention area. The 15" RCP
from the western side of the project site travels south and outfalls into the northwestern side of the
bioretention area.Additionally, a 36" RCP is proposed from the bioretention outlet control structure.
This 36" RCP flows southwest and ties into the 54" RCP line, which continues along the proposed
Westfeldt Drive. These pipes have been designed to safely convey the 25-year storm. Pipe profiles
and Pipe capacity computations can be found on sheet SW-01 of the stormwater plans(Appendix C1).
2.3 Operation and Maintenance Manual
The bioretention area requires maintenance to work properly. An O&M plan has been developed and
can be found in Appendix D.
2.4 Design Software and Manuals
The following design software programs were used in the analysis and development of the
stormwater and documents:
• Hydraflow Hydrographs for AutoCAD Civil 3D 2021
• AutoCAD Civil 3D 2023
• Microsoft Office 2021
6
ASHEVILLE REGIONAL AIRPORT-ATCT AND TRACON PROJECT INITIAL SUBMITTAL:MAY 2024
STORMWATER MANAGEMENT REPORT

The following design manuals and literature were used in the analysis and development of the
stormwater documents:
• NCDEQ Storm water Design Manual—2017 Edition
7
ASHEVILLE REGIONAL AIRPORT-ATCT AND TRACON PROJECT INITIAL SUBMITTAL:MAY 2024
STORMWATER MANAGEMENT REPORT

APPENDIX A
VICINITY MAP, SOILS SURVEY, FEMA MAPS & NOAA RAINFALL
DATA

x ur ua•i I (...._\ tI
Leicester as / `
\\l\ 4 f , Montreal
W....n 1�
IWF
\ r+ /
ova e n Ri cr"dne _
e \ w NA l':t.r,, 0
/
531,
0 nits
... - :I more q
LE) 0001E Da
AsN.
a Visage
mcd Candler b 1 Brtl
Fd osnte
65
Morning Star - Favv w
Beaverdam
0
AEON ram- fMa gEP`N
PROJECT I`\{o' 4, Royal Pines Dengn
LOCATION —.Ty. . S ^ of M91,u.Vx
Dak ark Nooceas CREEK M Ba Glum- k I�
'emu/
Flet er '-La eN`
0 6 65
rip
Fruiland
Mills River fEdneyville
Mountain
tome
Vicinity Map (Google Maps)
.. t a ,,� .t w r F.S e , SUEri, c,
. wli. :. 4.•.10—T.., , \-I ai., ,/,.
ikt
like
r.d c.• ,. Hohday4.� BtSuirtes *-rr
.. xyy • la ` ' 1 \\t A"�11 VIII�R:O_III, , ,� 1`a:a -'A. '-'LJ
-r`.r• + Clang lnn{� r �.
r„
,,he IIIeTAlroot eH ampton11 8�Su t w'
c 1 1� ��� r �, 4 rgshevi�le Ai pri 'Ingles Markets o g-d
iiii:F.,: ✓'`yeti. � r \a Q'uahtYllnnl'� y_i ��r ♦
r.. n Asheville Ai o y j
•
. ° • l .AS 3• t1e• 114',
ti 1 i Asheville z ' :; II
4 Regional c', yp1111,"11111a� •
,, ..ii . ,.- Mfirr'it. \',1 • • 7
•w i r-ENO 1 -� �'^ 11611
' ` t16111,
a�atho9 Gas ® '' Fng •Ra
WNC A r�oultural Center • 'o
_ e"�e'�'�, `\ 44
\ -.Davis Event Center i ,�
• �!, ,
'- °r `, z Kost�as Kitchen
tit• ., 1F '1.
Ikr♦ 1FF4. „ it 'frc'
'.' M � Harit€ .Dba_O / . .'-1'�,� a
r7\1 r eroad=rGollf - I
The Dog MY I /and Event Cente •
an Reteeafl,' • _. it .�';i '
C.T,ddQefetl . M +texrj, .•:& ,.
•
k`Hi�1 // DPoT4Amazon,11 4P-V.,+ _ � _ — t _- ��
Vicinity Map (Google Earth)

3 Hydrologic Soil Group—Buncombe County, North Carolina,and Henderson County,North Carolina
a `3
N N
M M
N N
W W
359730 359790 359850 359910 359970 360030 360090
35°26'4"N 35°26'4"N
O
1 \ ....
,;. —�
• ' 1
., .oidi (1. ,
/ - i,,44.4 -\
F.
Q \
0
` �' HyE
r
Jj
' \ —
1
�1 §
x
5
/// ._ , v
g 67000 INJ,p HAT nO1 b@ eci1 , ;Th uo I r c� OQo
35°25'48"N 35°25'48"N
359730 359790 359850 359910 359970 360030 360090
3 3
N Map Scale:1:2,510 if printed on A portrait(8.5"x 11")sheet
Meters
m N 0 35 70 140 210
Feet
0 100 200 400 600
Map projection:Web Mercator Corner coordinates:WGS84 Edge tics:UTM Zone 17N WGS84
USDA Natural Resources Web Soil Survey 5/17/2024
1111-10 Conservation Service National Cooperative Soil Survey Page 1 of 5

Hydrologic Soil Group—Buncombe County,North Carolina,and Henderson County,North Carolina
MAP LEGEND MAP INFORMATION
Area of Interest(AOI) p c The soil surveys that comprise your AOI were mapped at scales
Area of Interest(AOI) G C/D ranging from 1:12,000 to 1:20,000.
Soils • D Warning:Soil Map may not be valid at this scale.
Soil Rating Polygons
0 A p Not rated or not available Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
n A/D Water Features line placement.The maps do not show the small areas of
Streams and Canals contrasting soils that could have been shown at a more detailed
n B scale.
Transportation
Q B/D
r4-1. Rails Please rely on the bar scale on each map sheet for map
n C measurements.
ti Interstate Highways
C/D US Routes Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
0 D Major Roads Coordinate System: Web Mercator(EPSG:3857)
n Not rated or not available Local Roads
Maps from the Web Soil Survey are based on the Web Mercator
Soil Rating Lines Background projection,which preserves direction and shape but distorts
• • A distance and area.A projection that preserves area,such as the
1111 Aerial Photography Albers equal-area conic projection,should be used if more
• A/D accurate calculations of distance or area are required.
^r B This product is generated from the USDA-NRCS certified data as
.v B/D of the version date(s)listed below.
• r C Soil Survey Area: Buncombe County, North Carolina
Survey Area Data: Version 21,Sep 13,2023
• • C/D
Soil Survey Area: Henderson County, North Carolina
• • D Survey Area Data: Version 24,Sep 13,2023
• w Not rated or not available Your area of interest(AOI)includes more than one soil survey
Soil Rating Points area.These survey areas may have been mapped at different
scales,with a different land use in mind,at different times,or at
O A different levels of detail.This may result in map unit symbols,soil
O A/D properties,and interpretations that do not completely agree
across soil survey area boundaries.
• B
Soil map units are labeled(as space allows)for map scales
• B/D 1:50,000 or larger.
Date(s)aerial images were photographed: Apr 1,2022—May 9,
2022
USDA Natural Resources Web Soil Survey 5/17/2024
Conservation Service National Cooperative Soil Survey Page 2 of 5

Hydrologic Soil Group—Buncombe County,North Carolina,and Henderson County, North Carolina
MAP LEGEND MAP INFORMATION
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps.As a result,some minor
shifting of map unit boundaries may be evident.
USDA Natural Resources Web Soil Survey 5/17/2024
Conservation Service National Cooperative Soil Survey Page 3 of 5

Hydrologic Soil Group—Buncombe County, North Carolina,and Henderson County,North
Carolina
Hydrologic Soil Group
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
CuB Clifton-Urban land B 0.7 5.5%
complex,2 to 8
percent slopes
CuC Clifton-Urban land B 0.9 7.3%
complex,8 to 15
percent slopes
CuD Clifton-Urban land B 0.0 0.2%
complex, 15 to 30
percent slopes
Ud Udorthents,loamy C 4.0 32.2%
Subtotals for Soil Survey Area 5.6 45.1%
Totals for Area of Interest 12.5 100.0%
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
HyC Hayesville loam,7 to 15 C 6.0 47.8%
percent slopes
HyE Hayesville loam, 15 to C 0.9 7.1%
25 percent slopes
Subtotals for Soil Survey Area 6.8 54.9%
Totals for Area of Interest 12.5 100.0%
USDA Natural Resources Web Soil Survey 5/17/2024
Conservation Service National Cooperative Soil Survey Page 4 of 5

Hydrologic Soil Group—Buncombe County, North Carolina,and Henderson County, North
Carolina
Description
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive
precipitation from long-duration storms.
The soils in the United States are assigned to four groups (A, B, C, and D) and
three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential)when
thoroughly wet. These consist mainly of deep, well drained to excessively
drained sands or gravelly sands. These soils have a high rate of water
transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well
drained soils that have moderately fine texture to moderately coarse texture.
These soils have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of
water transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential)when
thoroughly wet. These consist chiefly of clays that have a high shrink-swell
potential, soils that have a high water table, soils that have a claypan or clay
layer at or near the surface, and soils that are shallow over nearly impervious
material. These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas. Only the soils that in
their natural condition are in group D are assigned to dual classes.
Rating Options
Aggregation Method: Dominant Condition
Component Percent Cutoff.None Specified
Tie-break Rule: Higher
USDA Natural Resources Web Soil Survey 5/17/2024
Conservation Service National Cooperative Soil Survey Page 5 of 5

National Flood Hazard Layer FIRMette - FEMA _Legend
82°32'55"W 35°26'8"N - _ SEE EIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT
i Without Base Flood Elevation(BFE)
i,' r • ithe A,BFE A99
- i
SPECIAL FLOOD With or Depth Zone AE,AO,AH,vE,AR
HAZARD AREAS Regulatory Floodway
%r
:- 0.2%Annual Chance Flood Hazard,Areas
T • of 1%annual chance flood with average
' depth less than one foot or with drainage
areas of less than one square mile zonex
� ♦. - Future Conditions 1%Annual
Chance Flood Hazard zonex
` ,
4101111111• ' • Area with Reduced Flood Risk due to
r OTHER AREAS OF Levee.See Notes.zonex
` FLOOD HAZARD V'A Area with Flood Risk due to Leveezone D
•• NO SCREEN Area of Minimal Flood Hazard zonex
` Effective LOMRs
J/ P OTHER AREAS Area of Undetermined Flood Hazard zoneD
' ---- Channel,Culvert,or Storm Sewer
• GENERAL
V ,I 4
Nip • - STRUCTURES III 1 1 1 1 Levee,Dike,or Floodwall
?' ,� �� � r • 20 2 Cross Sections with 1%Annual Chance
��♦ - j I 1Z•s Water Surface Elevation
'� ' . .1• 1 IT
K'' AREA OF MINIMAL FLOOD HAZARD-- - a— — — Coastal Transect
0 eff. 1/6/ LG rAs13 - Base Flood Elevation Line(BFE)
.40144 •� Limit of Study
,..;
Jurisdiction Boundary
Pit— 1E1
L �_ GITYLOF ASHEVILLE
•
--- Coastal Transect Baseline
h 370032 OTHER _ Profile Baseline
a.� >�+ ', \ ' , � 1 FEATURES Hydrographic Feature
v - • Digital Data Available N
• • lc je .
___,..,... _. ._ .
_...1„,„....„..
_ _
• ♦L , t
•. ,♦• •�, ` L No Digital Data Available
•• • ��,/. MAP PANELS Unmapped
• _ ••
'
•. h
• ' . Si 9 The pin displayed on the map is an approximate
J • •
point selected by the user and does not represent
an authoritative property location.
., f I, .
This map complies with FEMA's standards for the use of
�� ��\ r1100111, . digital flood maps if it is not void as described below.
The basemap shown complies with FEMA's basemap
\ 1 accuracy standards
• \ The flood hazard information is derived directly from the
Zone AE • , authoritative NFHL web services provided by FEMA.This map
4tilli
was exported on 5/1/2024 at 12:37 PM and does not
FFF reflect changes or amendments subsequent to this date and
.`� �� t time.The NFHL and effective information may change or
\ •
` ,��Ci i , become superseded by new data over time.
FLOODWAY ►• e< * \ - 3700964201 1'
Zone AE t ` / / This map image is void if the one or more of the following map
eft 1 1 elements do not appear:basemap imagery,flood zone labels,
s�/L/ -1 Al- ,-� Zone AE +f legend,scale bar,map creation date,community identifiers,
C 82°32'17"W 35°25'39"N FIRM panel number,and FIRM effective date.Map images for
Feet 1.V 00o unmapped and unmodernized areas cannot be used for
0 250 500 1,000 1,500 2,000 regulatory purposes.
Basemap Imagery Source:USGS National Map 2023

5/17/24, 12:24 PM Precipitation Frequency Data Server
NOAA Atlas 14,Volume 2,Version 3
"rt0f46. °""w," Location name: Fletcher,North Carolina,USA* '�� ''*
Latitude:35.437°,Longitude:-82.4821° E nonn N.
1 f
Elevation:2088 ft** I
"o,T�4"� *source:ESRI Maps "w„* �'�
`g O"" **source:USGS `'
POINT PRECIPITATION FREQUENCY ESTIMATES
G.M.Bonnin,D.Martin,B.Lin,T.Parzybok,M.Yekta,and D.Riley
NOAA,National Weather Service,Silver Spring,Maryland
PF tabular I PF graphical I Maps & aerials
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches)1
Average recurrence interval(years)
Duration -
1 2 5 10 25 50 100 200 500 1000
5-min 0.366 I 0.436 0.522 0.589 0.674 0.740 0.805 0.871 0.957 1.02
(0.331-0.407) (0.394-0.484) (0.471-0.580) (0.529-0.651) (0.602-0.745) (0.657-0.817) (0.712-0.892) (0.765-0.967) (0.830-1.07) (0.881-1.15)
10-min 0.585 0.697 0.837 0.941 1.08 1.18 1.28 1.38 1.51 1.62
(0.528-0.650)](0.630-0.773) (0.755-0.928) (0.846-1.04) (0.960-1.19) (1.05-1.30) (1.13-1.42) (1.21-1.53) (1.31-1.69) (1.39-1.81)
15-min 0.731 0.876 1.06 1.19 1.36 1.49 1.62 1.74 I 1.90 2.03
(0.660-0.812) (0.792-0.972) (0.955-1.17) (1.07-1.32) (1.22-1.50) (1.32-1.65) (1.43-1.79) (1.53-1.93) (1.65-2.13) (1.74-2.28)
30-min 1.00 1.21 1.50 1.73 2.02 2.25 2.48 2.71 3.03 3.28
J (0.905-1.11) (1.09-1.34) (1.36-1.67) (1.55-1.91) (1.80-2.23) (2.00-2.48) (2.19-2.74) (2.38-3.01) (2.63-3.38) (2.82-3.68)
60-min 1.25 1.52 1.93 2.25 2.69 3.04 3.41 3.80 4.35 4.79
(1.13-1.39) (1.37-1.68) (1.74-2.14) (2.02-2.48) (2.40-2.97) (2.70-3.36) (3.02-3.78) I (3.34-4.22) i (3.77-4.85) (4.12-5.38)
47) (3
2-hr 1.46 1.78 2.24 I 2.62 I 3.14 3.57 4.02 4.50 I 5.18 5.73
(1.32-1.62) (1.60-1.96) (2.02-2.48) (2.34-2.89) (2.79-3. .15-3.94) (3.52-4.45) (3.91-4.99) (4.44-5.77) (4.87-6.42)
3-hr 1.57 1.89 2.37 2.76 3.34 3.82 4.34 4.90 5.70 6.37
(1.42-1.75) (1.70-2.10) (2.13-2.63) (2.48-3.06) (2.97-3.70) (3.38-4.24) (3.80-4.82) (4.24-5.45) (4.87-6.39) (5.37-7.18)
6-hr 1.95 2.33 2.87 3.34 4.02 4.60 5.22 5.91 6.91 ' 7.75
(1.79-2.15) I (2.12-2.56) (2.62-3.15) (3.03-3.66) (3.62-4.41) (4.11-5.04) (4.62-5.74) (5.16-6.51) i (5.93-7.65) (6.56-8.63)
12-hr 2.46 2.94 3.61 4.15 4.90 5.52 6.15 6.82 7.76 8.51
(2.26-2.69) (2.70-3.21) (3.30-3.94) (3.79-4.53) (4.46-5.35) (5.00-6.03) (5.54-6.73) (6.10-7.50) (6.86-8.59) (7.46-9.48)
24-hr 2.93 3.52 4.34 4.99 5.89 6.62 7.38 8.16 9.25 10.1
(2.71-3.18) (3.26-3.82) (4.01-4.70) (4.61-5.41) (5.42-6.38) (6.07-7.17) (6.73-7.98) (7.40-8.84) (8.33-10.0) (9.04-11.0)
2-day 3.48 4.16 5.09 5.82 6.83 7.64 8.47 9.34 10.5 11.5
(3.23-3.76) (3.86-4.50) (4.71-5.50) (5.38-6.28) I (6.30-7.37) (7.01-8.24) (7.75-9.16) (8.49-10.1) (9.50-11.4)1 (10.3-12.5)
3-day 3.72 4.43 5.37 6.11 7.12 7.92 8.74 9.58 10.7 11.6
(3.45-4.00) (4.12-4.77) (4.98-5.78) (5.66-6.58) (6.58-7.66) (7.29-8.53) (8.01-9.42) (8.74-10.3) (9.72-11.6) (10.5-12.6)
4-day 3.95 4.70 5.65 6.40 7.41 8.20 9.00 9.81 10.9 11.8
(3.67-4.23) (4.38-5.05) (5.26-6.07) (5.94-6.87) (6.86-7.95) (7.57-8.81) (8.28-9.69) (8.99-10.6) (9.93-11.8) (10.7-12.8)
ir 4.59 5.45 6.54 7.41 8.58 9.51 10.5 11.4 12.7 13.8
7-day (4.28-4.93) (5.08-5.86) (6.10-7.02) (6.89-7.95) (7.95-9.20) (8.79-10.2) (9.63-11.2) (10.5-12.3) (11.6-13.7) (12.5-14.9)
10-day 5.25 6.21 7.38 8.30 9.54 10.5 11.5 12.5 13.9 14.9
(4.93-5.59) (5.84-6.62) (6.93-7.86) (7.79-8.83) (8.92-10.2) (9.81-11.2) (10.7-12.3) I (11.6-13.3) (12.7-14.8) (13.6-16.0)
20-day 7.11 8.36 9.73 10.8 12.2 13.2 14.2 I 15.2 l 16.5 17.5
(6.71-7.52) (7.90-8.86) (9.18-10.3) i (10.2-11.4) (11.4-12.9) (12.4-14.0) (13.3-15.1) i (14.2-16.1) (15.4-17.5) (16.2-18.6)
30-day 8.73 10.2 11.7 12.8 14.2 15.3 16.3 I 17.2 18.4 19.2
J (8.28-9.21) (9.71-10.8) (11.1-12.4) (12.2-13.5) (13.5-15.0) (14.4-16.1) (15.3-17.2) (16.2-18.2) (17.2-19.4) (17.9-20.4)
45-day 11.1 13.0 14.6 15.8 17.3 18.3 19.2 20.1 21.1 21.9
(10.5-11.7) (12.3-13.6) (13.9-15.4) (15.0-16.6) (16.4-18.2) (17.3-19.3) (18.2-20.3) (19.0-21.2) (20.0-22.4) (20.6-23.1)
60-day 13.3 15.5 17.3 18.6 20.2 21.3 22.3 23.2 24.3 25.0
(12.7-14.0) (14.8-16.3) (16.5-18.3) (17.7-19.6) (19.2-21.3) (20.2-22.5) (21.1-23.5) I (22.0-24.5) I (22.9-25.7) (23.6-26.5)
1 Precipitation frequency(PF)estimates in this table are based on frequency analysis of partial duration series(PDS).
Numbers in parenthesis are PF estimates at lower and upper bounds of the 90%confidence interval.The probability that precipitation frequency estimates
(for a given duration and average recurrence interval)will be greater than the upper bound(or less than the lower bound)is 5%.Estimates at upper bounds
are not checked against probable maximum precipitation(PMP)estimates and may be higher than currently valid PMP values.
Please refer to NOAA Atlas 14 document for more information.
Back to Top
PF graphical
https://hdsc.nws.noaa.gov/pfds/pfds_printpage.html?lat=35.4370&Ion=-82.4821&data=depth&units=english&series=pds 1/4

5/17/24, 12:24 PM Precipitation Frequency Data Server
PDS-based depth-duration-frequency (DDF) curves
Latitude: 35.4370°, Longitude: -82.4821°
25 - Average recurrence
interval
, (years)
20 - — 1
/A/
— 2
a▪ 15 — 50
o — 25
Z
!_° to - - 50
a — 100
V
d — 200
a
5 - 500
—
_f — 1000
C c c c C " " 1 6. 1 >, >.>. >, >, >. >. >.>.
•E •E •E •� •- L L L L L CoCoCoCO ro r0 r0 r0 r0
i N ril ry 7' 7 7 7 7 7
u1 Q m $ Duration N N ^ N M *I
25 - -
20
c
-- Duration
s
aa) 15 - �� 5-mm — 2-day
v
c — 10-min — 3-day
o
• —�-
a 15-min — 4-day
_▪ 10 - �� - — 30-mm — 7-day
_= — 60-mm — 10-day
✓ --
a) Jr
i -- _- - —� — 2-hr — 20-day
5 l_r1_ _�_ — 3-hr — 30-day
— — — — 6-hr — 45-day
0 r — i — 12-hr — 60-day
r ' r r r 24-hr
1 2 5 10 25 50 100 200 500 1000
Average recurrence interval (years)
NOAA Atlas 14,Volume 2,Version 3 Created(GMT):Fri May 17 16:24:44 2024
Back to Top
Maps & aerials
Small scale terrain
https://hdsc.nws.noaa.gov/pfds/pfds_printpage.html?lat=35.4370&Ion=-82.4821&data=depth&units=english&series=pds 2/4

5/17/24, 12:24 PM Precipitation Frequency Data Server
jtoyal Pines
F'.
d
Ar den' '\
Fletcher.
ii;
amil 3km
2m. tiojellanumm.h.
Large scale terrain
•
Kingsport• Bristol tJ
Johnson City• 0
Winston-Salem
Knoxville
• otst- Gi
r t.. Mt Mitchell
tyit ' sheville NORTH C
I
•Charlo
Greenville
100km SOUTH CAROI
ogui 60mi
Large scale map
Kin j.p.tt
John„__I,City •
inston-S.
KncxvillA �` ��
heviil
arlottr
Greenville
100km
60mi
Large scale aerial
https://hdsc.nws.noaa.gov/pfds/pfds_printpage.html?lat=35.4370&Ion=-82.4821&data=depth&units=english&series=pds 3/4

5/17/24, 12:24 PM Precipitation Frequency Data Server
Kingsport_.-Bri st of
• Johnson Ciy —
•
Knoxville
•
Asheville
'C harl ott
•
Greenville
100km
60mi
Back to Top
US Department of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
National Water Center
1325 East West Highway
Silver Spring,MD 20910
Questions?:HDSC.Questions(c�noaa.gov
Disclaimer
https://hdsc.nws.noaa.gov/pfds/pfds_printpage.html?Iat=35.4370&Ion=-82.4821&data=depth&units=english&series=pds 4/4

40}�� `-J „UNCOMBE C UNTY
no BUNCOMBE COUNTY HENDERSON COUNTY WINDSHEAR,aI- O P•ce ED TERMINAL C' FRTy� .....
�OCMWOOD ROq�� - / \ 'C, `" • -- -_ MEATS • Z 0 4 W/VR
• y� � SYSTEM LLW
NEW ROCKW MOD ROAD ,0 \\ -„,•.w rn:PR,,,,,,,:..s,,,,..0PoSE L "" A Z= AND NOSN AE A.KING,LnOMMERyeFw'O :•`..........„.„._
V-`--�.IIIU 1 O� RUNWAY
a35.2°32E SOBS' MAGNETIC
�J HENDERSON COUNTY ELEVA :2,1108 LOW N DECLINATION
0 9p` _
I
' IAL so
( PROPOSED AIR TRAFF NTR / ND •N{iE '..•- UILS :. ,i JD PROPOSED PARKI GD $ POINT ei
\ f /, MULTI-USE[II ���TT�.^� _ � -- I ,TOWER(ATCT)AND CRITIC A / / /'.- �"I__''/' 1, I III].._ n1""- [III] - PROPOSEO.ARFF p] - �" / PROPOSE•D , PROPOSED COMMERCIAL AND ❑` _ :ILITATIONc&,�. ONON-AERONAUTICAL MULTI-USE Q / PROPERTY RELEASE -'� PROPOSED COMMERCI- • IMPRO TS -./^'�``-..,,� -- O [III] _ .��� REQUIRED'FOR NCDOT ROW `\ / FVEHICLE LANE / [I •*""^� <•�,� PROPOSED GENERAL 1, ► - (. r [I] ,MINGB 'J Ril AVIATION DEVELOPMENT „� a Z = o ��T�- CKrillibl• PROP SED RUNWAYS END
- - [III) -nna w� �4� [I�� _ .4 L (ACT 1 p - LAT 035°25'32.87"N5,""` „_ EXPANDED""` `I _ -- - x 15 \- _�_ __- [II] / /- ` �NDDM�� • CON. 82°32'14.70"W
*aE_-_ ROAD FUEL FARM .0 - / / H - / ,, _ �''• OSED MMERCIAL] D ELEV. 2,1 .8
-L. j iv.
p [III] "' _r' O �Mir
� ERON' TICAL MUL II K 41bf [I]1
_ �1 7 I ! � 10 L r _ 1. 8/ �� 0 •
/ PROPOSED RUNWAY 35
' //2 p ' ! +) _'_ GiE- l - �_ �, - [ • o o -• *AL-
O T, RUNWAY PROTECTION ZONE )V�
-UNWAY 16 PR ZONE Cw 1 }_ • [Q� -�,.__ r ,.. ���
/ Q0(9�> v ... 40 'I y [IL '� a o0 '�M � �/ VISIBILITY<3/4 MILE
b .( I � f_• _ � I II ifi8 F
4 MILE o o I. /y I _ ,,:.2„
(1000 x1750'x 2,500')
(1,000xl.7sox25oo) •[]� 1 _� ® � - �I � / �� p]
o �' iQ� ) no
PROPOSED RUNWAY 17 END �./ 5 CS O O I��O.[]p, I�U' °'., -I E - i
m 'J �r l 0lRUNWAY 34 PROTECTION 1JJJ II:� Im �� R mr ,) / J \' ZONE VISIBILITY<3/4
LAT:35'26 47.13 N oo MILE
CON:82°32'48 04'W o ° - __� L x z,
PROPOSED RUNWAY
ELEV 2,164.4 o i� . / (1 000 x 1]50' S00)
iR LK
��i Pz o 0 4 D n )e :: TilifierikIff 1` . ,. _ " J/ / ppZ�-AONE NRUNWAY is END - -F PRIMARY-_SURFACE �'�, 35 a ° o SOS 67 ,�312 YLAT:35°25'4]39"N ' " GOLF COURSE
RUNWAY PROTECTION ZONE `� - • ,_ -.A `7 , ❑�®VISIBILITY<3/4 MIKE Z2 CON:82°32'41.19"W - ^TOFA - ITOFA - - r A F -- �� TOFA J(1,000'x 1,750'X2,50 ELEV:2,1644 HIGH POINT vc-a0 L -. I� - -- - - _ -
E o - '� FAQ � <®� _[I] IRE ROFA ... ROFA Ir"R ROFA ROFA 1
1JER ORN i - ."-� ., 5 �� \�,9 r- - _....... lig
Ofi�_ Iw��" MALSR
-
SUM VG /�' -R7I:ihIL7.1 n„ isz ,.:....,......oW�` ..L��G1�li� 1r i; II= -- LF�
-
O� ti ��•AiR A9_' A6 ,. • A5 •Z'�..a A4 OFZ OFZ A2 Ai f- I --:_-_-_-_-1
--
_ • r
(",], rsi.��l �4-H__-WIC - _ C
• Rr
12
z. \' ' '
7i96P2...i4KI-
: �'� OPOSED�RU BEAR G S20 05 33 E RUNWAY 17 35 I11IGi MALSR \ ,��. _ _ •R - - - - __ __
E IN ° g,l '.1 l-
IWS f'� '�® =MW OFZ I7� Of -o: • o DPP �� I
,aD AIRPO' ��ia■, •' a(CA uFz R.c� B�' . RSA
9p i�1 f� �Irk 1 I Ei .. _ iEc: !*�` �R'� r'�y I I
SERVICE•.AD i�u�l 1,1 �1�_ - J,l R I A- .� _ _
M V° RUNWAY 34 � �p _ vA •r �`' - uF -- 6 - I. I I
•,♦ RUN AV 16
LOCALIZER 1.8
Tcn--- --- 0 - - L
/ �� iiA TO - - Tx TTNRE TO OFA -�
A
e`_ V VG as J- -A-
' -'' - ACE 4 .... --- I OC Z�
_ 1, I !' "
TEMPORARY.�'> ry ..., i BRL • -R! BRL _/�1�•R -'��__
• 1- RPZ / 5.0
/ Ee AY \` GLIDE SLOPE ,T,•.,, 25. / VG os 25' -a 25' PRIMARY SURFACE __- o k ':.�5mr.
r'r 1 - \_�C � �PZ c
- / °ORo CRITICAL AREA
¢ �° �� ' '✓ A' PROPOSED RELOCATED _y -_ y'- I �.((
1 T°'� • / \ ter "ROPOSED GLIDESLOPE
> O ./ F F a a / RUNWAY 16-34 -ARP - CRITICAL AREA
^-.,. EU LAT:35.26 10.30 N - • -
C / ..OO_ _• PROPOSED / l '� y'�_ r C .c, X/ ,rv\ L051 82.32 30.50 �.^/ ] /
Q \ tOGV LEVEL DSHEAR -�,
e GLIDESLOPE �/ �L I,I� ! RUNWAY 34 PART TI
O t1 ALERT SYS EM LLWAS d RELOCATE ) X` / PROPOSED, •! f APPROACH SURFACE •
GLEN ,�O ( „CRITICAL AREA / '/ PAPI4 LOW LEVEL WINDSHEAR `PROPOSES-A� / �11 / : OCATE .SO) /
BRIDGE ROAD$E _ �, • I)� II] O eJe'e'e'e'e'e'e'e'e'e' ALERT SYSTEM LLWAS LAT:35°26'09. l� 't, L •/ AND IRIT AL AiA •RECISION INSTRUMENT
O Q < ( ) LON:82°32'31.34" RELOCATE O _ PROPOSED 50:1 APP.s' H INNER(10,000)
Z �t�, / / VASI 4 O COMMERCIAL AND 0,111 40:1 APPROACH.. R(40,000')
-UNWAV 16 PART]] ¢ i / - G` / /�///i/// [] Q.� NON-AERONAUTICAL VISIBILITY< „LE `
AP•IOA 5HSURFACE LL 'll i A 4 2\ ~�p (} O O OQ / - T c / PROPOSED TEMPORARY YYY�������, 1♦ a� BUNCOMBE COUNTY 000x 16,000'z60,000' ,
O VO b //// / __ / MULTI-USE (1,
PRECISIO t * O [U] ��
1 APPROACH INN 10.000 t ° f n ` ,:
.STRUMENT ll
401 PROACH OUTER(-1 LOOj -L Y, ,_ RUNWAY FUTURE WEST SIDE - T� - _ __I
<3/4 MI- -.! 0 0 / ,. / / - Y/PARALLEL TAXIWAY °� "P ,....-.-
VISIBILITY ---"
(1,000 x 16,000 x 50,000') t - ry _/ _ / _ ° ] -
/ PROPOSED AIR CARGO / 0 } ',` JET L��
O� y '4 / J G C_, I ,; HENDERSON COUNTY =w
O Q '"� <' a ., DEVELOPMENT AREA
O t } ,-� "" PO ~ PROPOSED RUNWAY 35
PROPOSED RUNWAY O / - '1�- - - [U] L O
PART 77 APPROACH SURFACE � 4,1 � �- v'/r / j� m„ � NgP o PART 77 APPROACH SURFACE
PRECISION INSTRUMENT V •'.. ;j'` " 04O J U PRECISION INSTRUMENT
50:1 APPROACH INNER 10,000' O O •e TRAFFIC CIRCLE P z
ti PROPOSED +x'= }[ F ° 50:1 APPROACH INNER(10,000')
( ) 2C /l �, m*!ay R�`�� / NCDOT PROJECT / �� O y 40:1 APPROACH OUTER 40,000'
40:1 APPROACH OUTER(40,000') '" ti /,l/T OMMERGIAL AND / ,L(U p ^m roq ��_ /.- ( )
VISIBILITY<3/4 MILE �O NON-COMMERCIAL / to , �/ ��/ d '_ >� • j�� j - _! /f'� VISIBILITY<3/4 MILE
1,000'x 16,000'x 50,000' MULTI-USE / n0 • '^""„„m�„_ ! (1,000'x 16,000'x 50,000')
[DI P'' Om L -
`IVERVIEWOR14, 2.------ ART „ // r/ f
'
'''''-'-'- '-'<1:-_,-,-'-'17'
mn 01 .
('S, i:,
FRENCH BROADA R y 0 ( �\
•
I--- RIVE
BUNCOMBE COUNTY 11 t
7 HENDERSON COUNTY �` ----s(` \t j /� li' �� 1 �'`, I) ` t
FACILITIES TABLE
EXISTING PROPOSED MODIFICATIONS OF DESIGN STANDARDS DEVELOPMENT PROGRAM
IL RUNWAY DATA TABLE a REF FACILITY NAME TOP REF FACILITY NAME 1 TOP ELEV NO, STANDARD MODIFIED FAA STANDARDS EXISTING CONDITION PROPOSED ACTION DATE APPROVED AERONAUTICAL STUDY PHASE I DEVELOPMENT ) [I] 1
RUNWAY 16/34 RUNWAY 17/35 ELEV (EST.) 1 RUNWAY LONGITUDINAL GRADE <0.5%1ST QUARTER 80.5%1ST QUARTERRELOCATE RUNWAY AUGUST 18,4578 ATL-603:7288:8-07-73
DESCRIPTION 16 NWrvTErvnrvcEo ICE BUILDING * A TRTRAFFIECWPJHSa NIIIO 2 RUNWAY TO TAXIWAY SEPARATION 400 325 BPS RUNWAY AUGUST18, 78 ATL-603:7288:8-07-73 PHASE II DEVELOPMENT I [II] 1
EXISTING PROPOSED
RUNWAY END COORDINATES(NAD 83) (AVIATION WAY)FF BTO
ER(Arcr)pIp .._ PHASE III DEVELOPMENT [III] I
6)35•s' S•s' LEGEND
93 p.39'N p.13'N VEHICLE STORAGE HANGARS°° NON-STANDARD CONDITIONS AIRPORT DATA TABLE ULTIMATE DEVELOPMENT I IU] 1
Q• LATITUDE (34)35.2993.12•N (35)35.25'32.87•N DESCRIPTION 1 EXISTING 1 PROPOSED ULTIMATE 16B MAINTENANCE STORAGE D GARS IIII _.
16)82°32'4].19"W n 02•ar48.04"w -_ _ - _ _ WITH OFFICE(MNOBERGH LANE) DEVELOPMENT[u] _, NO. NONSTANDARD CONDITION EXISTING CONDITION FAA STANDARD AIRPORT DATA EXISTING PROPOSED
LONGITUDE ( ( I AIRPORT PROPERTY LINESAME
(34)02°32'13.85"W (35)02.32114.70.W AIRPORT SURVEILLANCE RADAR20 T-HANGARS3(20UNIT)(T-ANGAR ROW) * F DEVELOPMENT[III] -2 1 RUNWAY LONG GRADE -1.0%1ST OUARTER(RW 34) 30..I ST QUARTER ELEVATION(MS, 2,165' SAME = ASHEVILLE REGIONAL AIRPORT
21 OFFICE BUILDING(AVIATION WAY) . G
PART CATEGORY OTHER THAN UTILITY SAME ( ) SAME SAME 30 BULK HANGAR(LINDBERGH LANE)
* H COMMERCIAL/NON-AERONAUTIC.O -= REPARATION 325' 400' AIRPORT
o (16)<y4 MILE (1])<y4 MILE CRITICAL AREA 2 RUNWAY TO TPXIWAY REFERENCE POINT(NA003)
APPROACH MINIMUMS RUNWAY CENTERLINE SAME LATITUDE 35.26'10.30"N 35°26'09.99"N
(31)<3I4 MILE (35)<3I4 MILE
£�+ PART Ti SURFACE SAME I LONGITUDE 62°32'30.50'W 62°32'31.34"W
MEAN MAX.TEMPERATURE HOTTEST APPROVED DATE
Bn 116150:1 117150:1 PAVEMENT 31 CONVENTIONAL HANGAR(AVIATION WAY) * H MULTI-USE DEVELOPMENToN-NON-AERONAUTICAL i MONTH 833 F SAME
APPROACH SURFACE SLOPEPARKING.COMMERCIAL,N lu)AER °
(34)sO:+ (35)50:+ BUILDING RESTRICTION LINE(BRL) ADT ROTATING BEACON,SEGMENTED CIRCLE, NORTH CAROLINA DEPARTMENT OF TRANSPORTATION
BRL BRL SAME HANGAR WITH OFF * ARO AIRPORT TERMINAL AREA NAVAIDS SAME
10 RUNWAY WIDTH 150' SAME 35 OFFICE AVIATION wan J MULTIUSE DEVELOPMENT IU)cu -s NOTES LORIMAR-SMALL-LOPE DIVISION OF AVIATION
RUNWAY SAFETY AREA(RSA) RSA RSA SAME FBO OFFICE BUILD AND HANGAR NPIAS SERVICE LEVEL PRIMARY-SMPLL-HUB SAME
RUNWAY LENGTH 8,001' SAME 40 TT-HANGAR ROW)'NG * K FUEL FARM IIIII -' 1. FAA'S APPROVAL OF THIS AIRPORT LAYOUT PLAN(ALP)REPRESENTS COMMERCIAL SERVICE
DISPLACED THRESHOLD NONE NONE RUNWAY OBJECT FREE AREA(ROFA) ROFA ROFA SAME STATE SERVICE LEVEL OM AIR CARRIER IC SAME
95, GAR N2(+7UNRI ITHANGAR ROW) ACCEPTANCE OF THE GENERAL LOCATION OF THE FUTURE FACILITIES
'a SURFACE ASPHALT-GROOVED SAME RUNWAY PROTECTION ZONE RPZ RPZ SAME 21es DEPICTED.DURING THE PRELIMINARY DESIGN PHASE,THE AIRPORT OWNER IS AIRPORT REFERENCECODE(ARC) GIII SAME APPROVED DATE
TSTR ING/TERMINAL DRIVE) REQUIRED TO SUBMITFST APPROVAL THE FINAL LOCATIONS,HEIGHTS AND TAXIWAY LIGHTING MITL SAME
PAVEMENT STRENGTH(LBS) OBSTACLE FREE ZONE(OFZ) OFZ OFZ SAME 4 BUILDING DRIVE) EXTERIOR FINISHES OF STRUCTURES.FANS CONCERNS ARE OBSTRUCTIONS, FEDERAL AVIATION ADMINISTRATION
v LO IMPACT ON ELECTRONIC AIDS AND ADVERSE EFFECT ON CONTROLLER W TAXIWAY MARKING ENHANCED SAME
SINGLE WHEEL 160.000 SAME
9' DUAL WHEEL 1fi0.000 SAME TAXIWAY OBJECT FREE AREA(TOFA) 70fA TOFU SAME 45
HANGAR(AVIATION WAY) OF AIRCRAFTGROUND MOVEMENTSWHICH COULD
ADVERSELY AFFECT THE SAFETY EFFICIENCY OR UTILITY OF THE AIRPORT
BO TLAWGAR 81 IT-HANGAR RO0I *
TAXIWAY SAFETY AREA(TSAI TSA TSA SAME$ DUAL TANDEM 260.000 SAME
BUILDING(ATCT EL 2226) gals 2. ALL ELEVATIONS ARE IN FEET ABOVE MEAN SBA LEVEL(MSC). APPROVED DATE
d RUNWAY LIGHTING HIRL SAME PRECISION OBJECT FREE ZONE(POFZI POf7 ♦1„"1��'V SAME 61 (TERMINAL DRIVE/
RUNWAY MARKING PRECISION SAME x x x x x x x 85 RENTAL CAR MAINTENANCE FACILITY * ALL ELEVATIONS ARE IN ACCORDANCE WITH NATIONAL MAP ACCURACY
FENCE SAME (RENTAL CAR DRNE) 3 STANDARDS.SPOT ELEVATIONS AND GROUND CONTOURS ARE DERIVED FROM
EFFECTIVE GRADIENT(%) 0.87 SAME AERIAL PHOTOGRAMMERTY AND ARE APPROXIMATE.GROUND SURVEYS ARE
FLOODWAY(100-YEAR) - NA NA 07 (TERMINAL DRIVE) * RECOMMENDED TO VERIFY ACCURACY, 500 0 500 1000
MAXIMUM GRADE 02) UTILITY BUILDING
LINE OF SIGHT VIOLATIONS GROUND ELEVATION CONTOURS / BO (TE
NA NA RMINAL wiNEI VAULT * 4. ALL LATITUDE AND LONGITUDE COORDINATES ARE NAD 83,
IRE(16 KNOTS)99.9193 SAME TREE LINE NA NA 70 PARKING TOLL PLAZAITERMIN.L DRIVE) * 5 SURVEYS OBTAINED FROM SCALE:1"=500' FEET
WIND COVERAGE(%) VFR:(16 KNOTS)99.51% SAME NON AERONAUTICAL DEVELOPMENT SAME s] RENTAL CARMGNHE CEFACIUTV * WOOLPERT.IINC..SURVEY DATE NOVEMBER 29,2011.
0 (RENTPL CAR AINEI
ALL WEATHER(16 KNOTS)GR OS% SAME fi. WETLANDS FROM LLASHEVIA REGIONAL AIRPORT RUNWAYASSESSMENT
RECONSTRUCTION LPN
GLIDESLOPE CRITICAL AREA - -- -- -- - SAME FORTPBLE OFF CE BU LD NG AND NEW PARALLELTAX WAY ENVIRONMENTAL ASSESSMENT DRAFT THE LPA
3 ry61MALSRRELS 71.17" (n)MusRRELSPAP174 91 (vmGHTBRorHERGWAn * GROUP AVIATION CONSULTANTS MAY 201, REVISIONS BY APP. DATE
-�-^ -^- RENTAL CAR READY/
CENTERLINE LIGHTING CEMERLINE LIGHTING LOCALIZER CRITICAL AREA SAME_ AIRPORT LAYOUT DRAWING
Q VISUAL APPROACH AIDS (34)MALS1/(M S,VASI(Ig (35)MPLSR NLL11 VASI(V4L1. _ _ ___ _ BOOTH * 7, THERE ARE NO KNOWN OFZ OBJECT PENETRATIONS,
___ _ RETURN SERVICE BOO
E Ca
n TDZBCEMERLINE LIGHTING TDZBCEMERLINE LIGHTING AIRPORT BUILDINGS HANGAR(31 AND.
INSTRUMENT APPROACH AIDS (16)ILS,GPS (IT)ILS,GPS UNUSABLE PAVEMENT IT04-xZ xx- NA NA 104 (WRIGHT BROTHERS VIA.IL t * 8. THERE ARE NO KNOWN THRESHOLD SITING SURFACE ITSS)PENETRATIONS.
(34)ILS,GPS (35)ILS,GPS WETLANDS HANGAR WITHGFFIDE 2181 9. ALL FUTURE DEVELOPMENT MUST MEET THE FULL DESIGN STANDARDS LISTED ASHEVILLE REGIONAL AIRPORT
AIRPORT REFERENCE CODE(ARC) r""s✓ •- x' 'r I NA NA 12° ONRIr(BROTHERS WAn IN FAA AC 150/5300-13.
AIRCRAFT ROTATING BEACON f� SAME ARDW3IGHTBRDHERGWAY, 2.,BB ASHEVILLE, NORTH CAROLINA
NG 737-]f10 LN ,+ HANG 10.THE BUILDING RESTRICTION LINEE((BRLOSHOULD BE LOCATED ON AN AIRPORT
HI RUNWAY SAFETY AREA(RSA)DIM. x , BOSAME 57 WIND CONE/MDSMCK @/g @ I> SAME 13a OFFICE
FIGHTBILDING BROTHERS 2'+� LAYOUT PLAN TO IDENTIFY SUT LE CATIONS FOR BUILDING AREAS ON
2 1 AIRPORT PROPERTY.THE BRL IS DEPICTED BASED ON FAR PART n SURFACE
t, RUNWAY OBJECT FREE AREA(ROFAI DIM. 800'x10,W+' SAME AIRPORT REFERENCE POINT(ARP) 4> Y NA 136 (AR FRAWRIGHT BROTHEFT RESCUE 8, EFIGHTIN FACILITY * FOR A DEVELOPMENT MUST
FURTHER RUNWAY CENTERLINE.SPECIFIC SITEMead SHEET
'. )(WRIGHT BROTHERS WA.G DEVELOPMENT MUST BE FURTHER EVALUATED BASED ON TOP ELEVATION OF T`�,.`
E OBSTACLE FREE ZONE(OFZ)DIM, 40013 9,401' SAME AUTOMATED SURFACE OBSERVING SYSTEMS(ASOS) O SAME SAME 140 CONVENTIONAL HANGAR PI 2..8 PROPOSED STRUCTURE.IT IS RECOMMENDED THAT THE BRL ENCOMPASS /'�
nL PRECISION OBSTACLE FREE ZONE(POFZ)DIM. 200'x800' SAME a BULK HANGAR(WRIGHT BROTHERS WAY) THERUEDFONWAY RAIRPORTTRAFFROTECTION ESTHEROLTOWEUNWAY ISILEARLINESOBIL,ZONE, SIGHTS �Unt 3
MEDIUM INTENSITY APPROACH LIGHTING SYSTEM WITH REQUIRED FOR CONTROL TOWER CLEAR LINES OF SIGHT.
(i6)2,164.4 (1]12,164.4 RUNWAY ALIGNMENT INDICATOR LIGHTS(MALSR) n/° n/} SAME * DELTA AIRPORT
8A RUNWAY END ELEVATIONS(MSL) 220 AIRPORT SURVEILLANCE RADAR 11.LEGEND ELEMENTS REPRESENT DEPICTIONS ON DRAWING,BUT MAY VARY IN
(24)2,110.8 (35)2110.8 PRECISION APPROACH PATH INDICATOR(PAR) l0000 I.•o NA BUILDING AND HANGAR * SIZE DUE TO SCALING ON DRAWING. CONSULTANTS,INC. OF
o- MAX.ELEVATION(MSC) 2,164.4 SAME 12GEOMETRICS DEVELOPED AND APPROVED PRIOR TO THE PUBLICATION OF
(18)2,1844 (17)21844 VISUAL APPROACH SLOPE INDICATOR(VAS/) 8 SAME SAME - DRAWN BY: MY SCALE: 1°=500
3W MG ELEVATIONI I 912 RENTAL CAR FUEL FARM * ADVISORY CIRCULAR 150I5300-13APRO �'I
g,' (24)2,140.0 (25)2,140.0 LOW LEVEL WINDSHEAR ALERT SYSTEM(LLWAS) 0 SAME SAME A ELEVATIONS NOT AVAILABLE CHECKED BY: RGL DATE: MARCH 2013

APPENDIX B
AIRPORT LAYOUT PLAN (ALP)

APPENDIX C
STORMWATER SHEETS & DETAILS

r 1 I 1
NOTES:
1. CONTRACTOR TO FIELD VERIFY THE LOCATION OF ALL UTILITIES PRIOR TO CONSTRUCTION ACTIVITY.UTILITY
LOCATIONS PROVIDED HEREIN ARE FOR PLANNING PURPOSES ONLY. 2 / h e v i l l e
2. CONTRACTOR SHALL MAINTAIN AND PROTECT ALL EXISTING SIGNS,LIGHTS,EXISTING UTILITIES AND CIRCUITS /
UNLESS OTHERWISE NOTED ON THE PLANS OR UNTIL REQUIRED TO BE REMOVED. _
3. CONTRACTOR SHALL NOTIFY THE ENGINEER IMMEDIATELY OF ANY DISCREPANCIES IN THE PLANS AND SHALL I • " REGIONAL AIRPORT
NOT PROCEED UNTIL CLARIFICATION IS PROVIDED.
4. THE CONTOUR INTERVAL ON THE PLAN SHEET IS 1.0 FT. ^`7 �
5. CONTRACTOR IS RESPONSIBLE FOR FIELD VERIFYING SUITABILITY OF TIE-INS TO EXISTING STRUCTURES. 0' 25' 50' 100' 150' A V O 1 �1T
6. ALL STORM DRAINAGE PIPES ARE DESIGNED BY OTHERS. I
1"=50'
AVCON,INC.
ENGINEERS&PLANNERS
10115 KINCEV AVENUE,SUITE
TOFA TOFA TOFA TOFA TOFA I TOFA TOFA TOFA 140HUNTEesvaLE,NC28ma
OFFICE:[phone]
` I RELEASED FOR
CONSTRUCTION
\. GREATER ASHEVILLE REGIONAL
V AIRPORT AUTHORITY - 1
DEED BOOK 1584 PAGE 350 ,�SH,a,,,,�'",,,,
® PIN #9643-41-6572 ;°�O..QpF ESS/p, 4y°;
' / e
��ry 40AL
/- 040195
n ,33 ti, - ti i1 ...reI ry,M1 \ / '%Oy'..fpCINEE�: `\,_
•
----„t , , .-- ,-- '",,,,,,,,..0
-2130- / try //
/' ' ry 2,26 - i ' .. ----1 _----- `7c 1-,__ ,� .,%\ ASHEVILLE
/r `i---` -;1 /- li�BORES. /i---'__--' .021
,2�''-' /----- ' ` /y,45�/ ,�' `\ �.�.` / REGIONAL AIRPORT
\N \ �._. /� . - ' --- ---2127_- i ,�'16' \ ,.�/ ,: \. \\`✓�--- FLETCHER
- •21256� /� k i \ N 6 �fi35.1640 \ \\ , NORTH CAROLINA
O \ \\ \\ \-1 (/ --- ' i` ��2$ / ii>"' _i/ \ \ E,944989.6320 \\ \\ /
PI \ \\ BORE / /' -' </ -<C<� '°N1 `\ / / ,b'u- i1--�� \ •S �,1, 2124.36 \ \\ / -.
\ \ \ BORE2 \\\'N\ (\ 2o3E0%2� �\� \ \��� \\2125 '(�\ / �/ / \/ �,-- \ \ / ✓ rnt\
•
❑ \\\� \\\ \\ \\ `� -__-- \_ __--�- --2127 ' \ \ \\ \ — /�ry r1 \\�\ /wry, \\\\\\ I \\\•\\\ / uh �E 0.
p \��\ �x\�2211•.6.56 [��� �U\qqEE F __ --_--- -_2129 - _ \ � N. . \ CI [ \ ,�N'1? �\\ I \\`\ --_- / _ - - -
~ \\\\\\ _'` B2 .63 \ f__- --\ _ ` ?728�- \__ \ \ \ � a\` \ \\ I ✓- KEY PLAN
o
_ - � = - r Jivyv \^DL ( \\\ ` \ j� z1az � � \r /
- I \1
z —_ — \\r
_ _ _ - - ____�� ----_ \ c \ `—\ \ i \2,�\ N IE —_ =_ _ — ` — --- _ __-__ _ '_— _ - _- __= / � \ . '2 Ya - � ot_ = _ ' ) � \ ` ��yam\ i
ATCTANDTRACON
1%\ � \ \w - - r - .���� ,. ao vv-v-,Mc ;' s ,- .Y_,y . �'S'�rva ir r ` i=�Y �- �
r
���t-ram i^i ryNN°��_ \\ /1,\�` -��\��\ J
ue -;i ( t/ // - \\.'/ /\\\ _"�\\`\�\
I =JJ ( _�` \� — "-'-'N N. EXISTING CONDITIONS
r , I ,
❑ � GF LINAMAR LLC r- \ ��- -\ \ \\�\
EED BOOK 1658 PAGE 97 ;1 1-- \�� \ �/ \ \\\\\ -PIN #9643-41-2191 1 IJ \\ \\ �� \- \ \\ \�\��\r-- y\
\ \ ATTENTION'
THIS DOCUMENTALL OF CONTAINS PRIVILEGED PROVIDED
PROPRIETARY
I ` \�\\�/ \ . '� \ \�\\\ \\ � \ INFORMATIONUSEB T ALL OF HE INTENDED
WHICH IS EXPRESSLY FOR ASPEaVCAVCON,PURPOSE.
SE.,
U I\ \ \\\ , / \\\ \\ \\ \` FOR ITHOUT THE EXPRESS WRITTEN CONSENT OF AVCON,INC.ANY E.
�I n \
Q I \ \ \\ / \ \\ \ N \\�� \\\---- DISTRIBUTION,W WHOLE
REPRODUCTION,OR OTHER USE O THIS DOCUMENT,IN
> -\ r\\\ \\ ! \\\� �'\�\ WROLEORINPART.IaaTRIDTL.PRORIaITED
2I A�� �� �v /� \ V,V ��vv�wv SCALE: 1"=50' AS NOTED
, ' /\ \\ \ \/ ( \\\ �\\\ \
l `\\\\ / \ l r� \\\ \ �\,\��\N\ REVISIONS:
> N
\ \ \ \ I \\\•
\\ \\ \
NN 1 \\\\ \J/ ( \ - N \\\ \\\\`\\`\\ \ NO. DATE BY DESCRIPTION
Q
N \== (\' N\\ ) 1 '\J/ / \\ \ \\\\�\ \\N \--
> =" \ ^\\\,\\ 1 111 i I --\"'\
✓ N\\ \\\\\ ‘`\ DESIGNED BY: H.C.A.I
\\\`
o \\ \ \ \ J DRAWN BY:
z \ --— - _\�\ \ \ \ ( 1 1 1 \ /\\,' \, N\�\\\ CHECKED BY: D.A.S.
w \ - \\\ ��\�\\ \ ( \ \\\N\ / \\ •\‘ \\\\ \ APPROVED BY: D.A.S.
z ,' - .\\\\ \\�\\/ \\\!\\\.\ DATE. MAY2024
\ \,`,,, \ \�\\\\, \N 'N.
STATE LICENSE# N.C.C-2450
U -- 1 / \ PROJECT NO. 2022.0157.02B
—�\ i �i \. SHEET NUMBER
ci tea-\, I .. ` SW-UU

t i
BIORETENTION STAGE/STORAGE
NOTES: /
Elevation Storage 1. CONTRACTOR TO FIELD VERIFY THE LOCATION OF ALL UTILITIES PRIOR TO CONSTRUCTION ACTIVITY.UTILITY
Stage B LOCATIONS PROVIDED HEREIN ARE FOR PLANNING PURPOSES ONLY. 2 " I(ft) (ft) (cuft) 2. CONTRACTOR SHALL MAINTAIN AND PROTECT ALL EXISTING SIGNS,LIGHTS,EXISTING UTILITIES AND CIRCUITS - s h e V i I I e
UNLESS OTHERWISE NOTED ON THE PLANS OR UNTIL REQUIRED TO BE REMOVED. ,C
0.00 2121.50 _ 0 3. CONTRACTOR SHALL NOTIFY THE ENGINEER IMMEDIATELY OF ANY DISCREPANCIES IN THE PLANS AND SHALL I \ " REGIONAL AIRPORT
0.50 2122.00 3213 NOT PROCEED UNTIL CLARIFICATION IS PROVIDED.
1.50 2123.00 11288 4. THE CONTOUR INTERVAL ON THE PLAN SHEET IS 1.0 FT. AVCON
�
2.50 2154.00 22499 5. CONTRACTOR IS RESPONSIBLE FOR FIELD VERIFYING SUITABILITY OF TIE-INS TO EXISTING STRUCTURES. 0' 10' 20' 40' 60' A V O 1 �1T
3.50 2125.00 37195 6. ALL STORM DRAINAGE PIPES ARE DESIGNED BY OTHERS. ,
1"=20'
AVCON,INC.
I _ r / 1\11 ENGINEERS&PLANNERS
IN IF LINTERS AVENUE,SUITE
K"' ! 1 ! ! ry�� ,� 1 - �\ laoC CEC 9savaoe ms
�/' �� /'� INE � � ' � � ' � � I � �� � � i � _ RELEASED FOR
_-- 11 CONSTRUCTION
- QoQo_QoiQoe=oOoQoOcie'oQoQoQo• f•QoQoQc��j Jjo oQo\ 'Oo
Ao�moo.moo_/JA`'.moo_moo_ Ao� _moo_ / o / o_ _��o �o �o �o �o \o o c „,M''AR, ,
S-3 _ S-4 _ S-5 ,, _ I-' _—_—'\ :Q
/ ---_-- �■ SEAL
MMP
in
mm
■� \ 040195
N I A
"rti> Aillii\ / ‘110
S-19 PRE-TREATMENT FOREBAY
ry�9� BOTTOM ELEV. 2121.5
TOP ELEV. 2123.0 = v ASHEVILLE
2,25 —— \,\, REGIONAL AIRPORT
SOD BIORETENTION BOTTOM — FLETCHER
__— ® r AND SIDE SLOPES NORTH CAROLINA
SAN MIMI Em S-22 ; _-- � ,
/ `SAN S _— ,'L,ryO \\�\ - tb�
4" PERFORATED
v AN`S S-2U S-2� gr_ .
AN W W W W W E I �h UNDERDRAIN @ 0.5/° �►\ \\
CN ,. � �491 \ 2125 6\\--2129Q -- /i� __ _ `111
\\��\ \\ KEY PLAN
Z SEE SOIL/PLANTING '.- 2� 2AZ�.o 21260 21 ,.o SAN
a.o SA,_ ��I / \
V' S N �SA S•.5REQUIREMENTS FOR FILTER / 212 ao /N % MODIFY EXISTING OCS \�� \ \
I rI MEDIA ON SHEET SW-02 1 �22122 ,/ o EE DETAIL SW-03 �\ ATCTANDTRACON
1 J �����LJ� ����LJ I / ,----/
\ /���// I N \
1`
m124�- If
i
/ i���IT�•1 < ///�/ //SA, m / N \<i
"1,1,
\ \.
W 2125- � \// /�/ \g \
v S-24 '_': v A
iii
---- —_�27 _ l�1��\ 4�/ / - l�l�-- '\\ N i
4. \ \�; 9 \ STORMWATER PLAN
------- ,8___17-,../i4......---,./.0--- 47 -i-r-1 ,_87-11....8-4:-2:7- %
o S-35 U4y 2/2p I'�) • l\\S-37 ///�/\ \/� 17:1-1:_/::;:17/
//\l \\ of \ \ ATTENTION.
�/t��� \ /\\ \ \� \ \ O -\ FlTHIS DOCUMENT CONTAINS PRIVILEGED AND PROPRIETARY
. `� U;���._� - l//�l/ ll/�l /lll�/ - �I� G` \\ \ \ a \� \ O I I - IFOR USE B'Y WHICH IS
EXPRESSLY
FOR PROVIDED BY AVCON,INC.,SPED IC PURPOSEF •I�/'�� g \l \ l \ ' \ \ (� 1 ^ 1 ,��9' FWITHOUT THEEXPRESSWRITTENCONSENTOFAVCON,INCANVQ -2130 4Vy �.�' / 2121,J- \\ \ •v_ S \ ryDISTRIBUTION,REPRODUCTION,OR OTHERUSE OF THIS DOCUMENT,IN
..... — __
_ �� -- 2122.0 \ \//\ '` \� \\ \ N \ iWHOLE OR IN PARi�S STRIGiLV PROHIB iED
o -------- ___ .i i oMM _ __2123.0 \\ �a �y ���� \ / / �\ s d SCALE: r'=zo' AS NOTED
v - _---- AIM •_ \ COMM 2124.0 COmM \ comet ' \ \ \ ,` REVISIONS:
, rsMM __ ��_ - cew omM S., W �,.W//.!\ \ W/ `
--_\\ _� omm- 32___-_ --__-__- _ _ 2125.0 Win` \\ \ W \ L \� NO. DATE BY DESCRIPTION
O — coMm CORM-----.. —_--e\—_—�.M -- _—_ -- —_ —_ -- _t 2.1L6 — ___ \ —_—_ —_ ---- -- \\\ SAN /r 5/ SAN \ ' \ \\ �!
NI.
'p __-----_ \ \\ ?73.. `_ ------------------------------- _------ 2130- ---_ - -�\ \ 1 oM 1 IcoN / - -_�/ / �� \
0.
Z I — PRE-TREATMENT FOREBAY _ ry1ry0, �, / /l ,',
o BOTTOM ELEV. 2121.5 ,.ryry ,,09.6 -�25�/ // ,/' ,/' ,/ / / /' \�_�,__ DESIGNED BY: D.A.S
a1 TOP ELEV. 2123.0 '� / 2 — A� ' '� / / / —J, \
v _/,� / ,2�//-'Cry ry , / / ( \, DRAWN BY: H.C.A.
(.9 / �f f' ��,ry`ry 'ryry, ���/ ate/ // / /� \\ \\ CHECKED BY: D.A.S.
w —/' f' / // ,.ti y^ �/ \\ APPROVED BY: D.A.S.
z 81 LF 36" RCP @ 1.25% 1 r _. '� // / /ry>,N \\ \ DATE: MAY 2024
- ' I / _/ // / // \\
W
--�/ r�� / / /� / STATE LICENSE# N.C.C-2450
m
'_J/� i ( �/ / / a PROJECT NO. 2022.0157.02B
1 ,�
s -%_J/ i ( \ SHEET NUMBER
11/44,
- SW-01

r 1 i
y
sheViIIe
OUTLET CONTROL STRUCTURE, NOTE:THE OVERALL POND DEPTH IS 3.5 FT,BUT THE REGIONAL AIRPORT
SEE DETAIL SW-04. 100-YEAR DEPTH IS ONLY 2.1 FT OF PONDING.
RISER CREST ELEV.:2124.0' .AV C ON
TOP OF DAM ELEV.2123.0
S-37&S-24
/� �. POND BOTTOM TOP OF DAM ELEV.:2125.0 TO 2126.0 AVCON,INC.
!/�O�!/�0�� (PLANTING SURFACE)
ENGINEERS&PLANNERS
/// 10115 KMCEY AVENUE,SUITE
44. ELEV.:2121.5 140 HUNTERSVILLE,NC 280'18
�j/�j/�j/�N SET THE TOP OF THE INTERNAL oFFlce1ro41Nsa_voos
/.#.* I /v/ • WATER STORAGE(IWS)ZONE A
/��!/��0��!/4 CLEANOUT DESIGN VOLUME �jj��jj��jj��%/��%/�p�i� MINIMUM OF 18 INCHES BELOW THE
N !!/ //!/!/!/!/!/�!/!/�>//N�!/.'!� PLANTING SURFACE.UPTURNED PIPE RELEASED FOR
��4 '-: PEAK ATTENUATIONVOLUME SOD `��OQ� /�Nj��j/N`'`````i���`� `���/���• �% SCHEDUL SHOULDE 0 PVC,STFtAE PPEED D TO CONSTRUCTION
�FvFo,�:�. �� �s, � � A Oj/Oj�;/Oj/�Nj/\�j i.N THE SIDE OF THE OCS STRUCTURE.
`ZN CA Rp"o,
a IMP
• I ...� MN e*'� %/ ��! 2,QQpFCSS/p��.y9,;
• .• • Milmamii1_;II�IImawii1=91 IImamii•-:i p-..III ' •j.O.O. ii = SEAL `
•• _ _
p .,. .� i dill = III�II•_•• II_�II_ _111_��I•_••• %*4 /\�//��/ *. = a4alss
'# oO�ViO!�!O!�✓/O!�i,, • MI.. .•_•• II&E;•—••.—•' IIIL...__�" •�1111 .! !�!p!�!p!�!p!p. pl�lp. o..,
/i . /N.!/�/�!/��!��/��!� '.:6�.I 11M1 L`'.IL.IL`E llI!! .:.I::: llIM'.IL`.� :.I��,I I!!...: ,/��'�!�!��/�!/��!/\/��!/�!/�!/�� . ��!/�!/�1SS! V9 ..,'C-,IN•,.J., ,`'
:.:.
INLET PIPE �;����� ��������� - - - - - - - - _ /!✓/✓/✓/!/!/!/!/!/!//�!/��.��!��.������!/����!/��! '',1:/9 Afi,SK`o,°
�, yr' y TIE TO PROPOSED ` 1
4'4 // //• 1�p � ���✓�V " �" V:W •, INLET S-8
RIP RAP FOREBAY,BOTTOM .v-A14 I/�li1/.,v 1�-%iA'%�j'd ',0^�� � i'ib'- t / d�>4kA�jNCj: ��.\> _
ELEV.:2121.5 �Z`O'o'��olo'.� •.�'��� � �'o ASHEVILLE
SSPE MEDIA CS
,�;..`�. /�!i`�/A/i/�O !�!�.��!�.��0,�.��0,�.��/ 44 REGIONAL AIRPORT
SPECS BELOW ✓ //✓' /✓'
GEOTEXTILE FABRIC ‘!`��`� /���;��INV OUT:2119.0' • • QOs.
�����'' �• �' FLETCHER
NO MECHANICAL COMPACTION DO NOT •,4 /,�
2"-4"#57 STONE ABOVE UNDERDRAINPERFORATED ��� NORTH CAROLINA
MECHANICALLY COMPACT THE MEDIA. 81 LF OUTLET PIPE.
4"UNDERDRAIN PERFORATED PIPE @ 0.5%SLOPE, WATER OR WALK ON IT AS IT IS PLACED. 36"RCP,1.25%SLOPE
WRAPPED IN FILTER FABRIC (BY OTHERS)
a 6"#57 STONE BELOW AND ON EITHER ,,",' 4 '1,-
o SIDE OF THE PERFORATED PIPE ""' "'"7 y0____i n,V
N A
N ,4U.. A��.
N .Al 1+_ II__ __
L.o Design Volume- Required Design Volume-Provided KEY PLAN
o Drainage Impervious Rv RD(Design Design Volume Design Volume Depth Surface Area Surface Area Design Volume
co IA(Impervious
a Area Area (0.05* Storm Depth) (3630*RD*Rv*A) Required Provided Required Provided Provided
w (ac) (ac) Fraction) 0 9*IA) (in) (cf) (cf) (ft) (sf) (sf) (cf)
0
I Bioretention 1 6.13 1.12 0.18 0.21 1.0 4,772 Bioretention 1 4,772 1.0 4,772 7,251.0 7,251 ATCT AND TRACON
N
0
Si
I-
LA
= BIORETENTION SECTION VIEW A-A
V N.T.S. STORMWATER
w
DETAILS
0
N0. 1
w
z
z
O BIORETENTION MAINTANENCE: BIORETENTION SOIUPLANTING REQUIREMENTS:
w0 • WATERING: PLANTS SHOULD BE SELECTED TO BE TOLERANT OF THE BIORETENTION FACILITY'S PARTICULAR CONDITIONS. WATERING MAY BE REQUIRED TO INITIALLY ATTENTION:
ESTABLISH THE VEGETATION. WATERING SHOULD NOT BE REQUIRED AFTER ESTABLISHMENT (ABOUT 2 TO 3 YEARS). HOWEVER, WATERING MAY BE REQUIRED DURING MINIMUM MEDIA DEPTH THIS DOCUMENT CONTAINS PRIVILEGED AND PROPRIETARY
PROLONGED DRY PERIODS AFTER PLANTS ARE ESTABLISHED. THE MINIMUM DEPTH OF THE MEDIA DEPENDS ON THE DESIGN OF THE CELL AS FOLLOWS: INFORMATION,
USETBY THALL
w°E WHICH RRECPIENT.AND PROVIDED
ASPEc CPURP'OSSE:'
I— WITHOUT THE EXPRESS WRITTEN CONSENT OF AVCON,INC.ANY
a • EROSION CONTROL: INSPECT FLOW ENTRANCES, PONDING AREA, AND SURFACE OVERFLOW AREAS PERIODICALLY. REPLACE SOIL, PLANT MATERIAL, AND/OR MULCH IN (A) ALL CELLS WITH TREES AND SHRUBS: 36 INCHES; DISTRIBUTION,REPRODUCTION,OR OTHER USE OF THIS DOCUMENT,IN
WHOLE OR IN PART,IS STRICTLY PROHIBITED
> AREAS WHERE EROSION HAS OCCURRED. EROSION PROBLEMS SHOULD NOT OCCUR WITH PROPER DESIGN EXCEPT DURING EXTREME WEATHER EVENTS. IF EROSION (B) CELLS WITHOUT TREES AND SHRUBS:
<I PROBLEMS DO OCCUR, THE FOLLOWING ISSUES SHOULD BE RE-ASSESSED: FLOW VOLUMES FROM THE CONTRIBUTING DRAINAGE AREA AND BIORETENTION SIZE; FLOW (II) WITH INTERNAL WATER STORAGE: 30 INCHES. SCALE:N.T.S. AS NOTED
L.
o VELOCITIES AND GRADIENTS WITHIN THE BIORETENTION FACILITY; FLOW DISSIPATION AND EROSION PROTECTION METHODS IN THE PRETREATMENT AND IN-FLOW AREAS. IF
O SEDIMENT IS DEPOSITED IN THE BIORETENTION FACILITY, IMMEDIATELY DETERMINE THE SOURCE, REMOVE EXCESS DEPOSITS, AND CORRECT THE PROBLEM. MEDIA MIX REVISIONS:
fl • PLANT MATERIAL: DEPENDING ON PLANTS SELECTED AND AESTHETIC REQUIREMENTS, OCCASIONAL PRUNING AND REMOVAL OF DEAD PLANT MATERIAL MAY BE NECESSARY. THE MEDIA SHALL BE HOMOGENOUS SOIL MIX ENGINEERED MEDIA BLEND WITH APPROXIMATE VOLUMES OF: NO. DATE BY DESCRIPTION
a BE CAREFUL TO PRUNE TREES AND SHRUBS TO MAINTAIN LINES OF SIGHT IN PARKING LOTS AND ALONG ROADWAYS. NCDOT STATES: "SHRUBS MUST BE KEPT LOW, AND (A) 75 TO 85 PERCENT MEDIUM TO COARSE WASHED SAND (ASTM C33, AASHTO M 6/M 80, ASTM C330,
SO TREES AND LARGE SHRUBS UNDER-TRIMMED SUFFICIENTLY TO PERMIT CLEAR SIGHT IN THE AREA BETWEEN 2 FEET AND 6 FEET ABOVE ROADWAY ELEVATIONS. REPLACE AASHTO M195, OR THE EQUIVALENT);
•r ALL DEAD PLANTS. HOWEVER, IF SPECIFIC PLANTS CONSISTENTLY HAVE A HIGH MORTALITY RATE, ASSESS THE CAUSE AND REPLACE WITH APPROPRIATE SPECIES. PERIODIC (B) 8 TO 15 PERCENT FINES (SILT AND CLAY); AND
1- WEEDING IS NECESSARY UNTIL GROUNDCOVER PLANTS ARE ESTABLISHED. WEEDING SHOULD BECOME LESS FREQUENT IF AN APPROPRIATE PLANT DENSITY HAS BEEN (C) 5 TO 10 PERCENT ORGANIC MATTER (SUCH AS PINE BARK FINES)
w ESTABLISHED.
cc • NUTRIENTS AND PESTICIDES: THE SOIL MEDIA AND PLANT MATERIAL SHOULD HAVE BEEN SELECTED FOR OPTIMUM FERTILITY, PLANT ESTABLISHMENT, AND GROWTH WITHIN MEDIA P-INDEX
a THE PARTICULAR CONDITIONS OF EACH BIORETENTION FACILITY. NUTRIENT AND PESTICIDE INPUTS SHOULD NOT BE REQUIRED AND WILL DEGRADE THE POLLUTANT 1. THE PHOSPHORUS INDEX (P-INDEX) FOR THE MEDIA SHALL NOT EXCEED 30 IN NSW WATERS AS DEFINED IN
z PROCESSING CAPABILITY OF THE BIORETENTION FACILITY, AS WELL AS CONTRIBUTE TO ADDITIONAL POLLUTANT LOADING TO RECEIVING WATERS. BY DESIGN, BIORETENTION 15A NCAC 02B .0202 AND SHALL NOT EXCEED 50 ELSEWHERE.
0 FACILITIES ARE TYPICALLY SPECIFIED IN WATERSHEDS WHERE PHOSPHOROUS AND NITROGEN LEVELS ARE OFTEN ELEVATED. THEREFORE, THESE SHOULD NOT BE LIMITING DESIGNED BY: D.A.S
> NUTRIENTS WITH REGARD TO PLANT HEALTH. IF IN QUESTION, HAVE THE SOIL ANALYZED FOR FERTILITY. ADDITION OF COMMERCIAL FERTILIZER OR COMPOST TO OTHER MEDIA NOTES
BIORETENTION WILL LIKELY RESULT IN NUTRIENT EXPORT FROM THE BED. 1. THE MEDIA SHALL NOT BE MECHANICALLY COMPACTED. IT IS RECOMMENDED TO EITHER WATER IT OR WALK DRAWN BY: H.C.A.
0 • MULCH: REPLACE MULCH ANNUALLY IN BIORETENTION FACILITIES WHERE HEAVY METAL DEPOSITION IS LIKELY (E.G., DRAINAGE AREAS THAT INCLUDE ON IT AS IT IS PLACED. CHECKED BY: D.A.S.
z 2. THE BIORETENTION CELL SHALL BE MAINTAINED IN A MANNER THAT RESULTS IN A DRAWDOWN OF AT LEAST
d COMMERCIAL/INDUSTRIAL USES, PARKING LOTS, OR ROADS). METAL 'HOT SPOTS' OCCUR WHERE WATER ENTERS THE BED. IN RESIDENTIAL OR OTHER SETTINGS WHERE
w METAL DEPOSITION IS NOT A CONCERN, REPLACE OR ADD MULCH AS NEEDED TO MAINTAIN A 2 TO 4-INCH DEPTH. ONE INCH PER HOUR AT THE PLANTING SURFACE. APPROVED BY: D.A.S.
z
z • FILTERING CAPACITY: WHEN THE FILTERING CAPACITY DIMINISHES SUBSTANTIALLY (E.G., WHEN WATER PONDS ON THE SURFACE FOR MORE THAN 12 HOURS), REMEDIAL DATE: MAY 2024
w ACTIONS MUST BE TAKEN. IF THE WATER STILL PONDS FOR MORE THAN 12 HOURS, THE TOP FEW INCHES OF MATERIAL SHOULD BE REMOVED AND REPLACED WITH
o FRESH MATERIAL. THE REMOVED SEDIMENTS SHOULD BE DISPOSED OF IN AN ACCEPTABLE MANNER (E.G., LANDFILL) OR LAND APPLICATION. IF THAT DOES NOT SOLVE
M THE PROBLEM, MORE EXTENSIVE REBUILDING IS REQUIRED. IF THE BED HAS FILTER FABRIC INSTALLED UNDER THE MEDIA AND ABOVE THE WASHED ROCK, THE FILTER STATE LICENSE# N.C.C-2450
FABRIC MAY BE CLOGGED WITH SEDIMENT. IF CLOGGED FILTER FABRIC IS PRESENT, THE BED WILL NEED TO BE REBUILT. PROJECT NO. 2022.0157.02E
Y
U
M SHEET NUMBER
U '1/4. SW-02

r 1 r
y
sheville
REGIONAL AIRPORT
TRASH RACK `
EXISTING WEIR OPENING HEIGHT=6" A VJ CON
EXISTING WEIR LENGTH=48",TYP.EACH FACE
ALIIIL
AVCON,INC..
STRUCTURE TOP ELEV.:2124.0' EN
4i e5SS SUITE
M for I5 KINCBY AVENUE,SUITE
140 HImTERHVILLE,NC lams
OFFICE'po4)954-9oos
TOP OF EXISTING WEIR OPENING:2123.50' `""""a"`°"""`°"'
RELEASED FOR
BOTTOM OF EXISTING WEIR OPENING:2123.0' CONSTRUCTION
iMMENNEMENNEMENNEMENNI
■■I••••••••••••••••••••I
NEW 36"LONG WEIR AT 2122.5' ���������������������
2121.5' octN_CA Rpz�
-1 1 I-1 1 1-1 1 1-1 11-i 11-I o2,QQ,pFC5S/p �Yy;
NEW 4"UNDERDRAIN CONNECTION _ SEAL __
IT WITH IWS,SEE DETAIL SW-02 040195
II I... I... i I... 1 I.. ::.-14. _...II II NEW FILTER MEDIA, III .. `- I=SEE DETAIL ON SW-02= I I-
II III III III III III III 1
.;TURF ELEV.:2119.0'
II III III III III III 111 I •
LE
48.. RERPORT
- 60" _ ER
NOLINA
OUTLET CONTROL STRUCTURE NOTE:
1. CONTRACTOR SHALL CUT IN NEW WEIR ALONG NORTH FACE.THE NEW WEIR WILL BE 6"LOWER THAN -T_r,♦
THE EXISTING WEIR OPENING AND WILL EXTEND 36"ON CENTER OF THE NORTH FACE OF THE OCS. -^} u�' .
cv
cfq
. MODIFY EXISTING OUTLET CONTROL STRUCTURE KEY PLAN
o N.T.S.
vi
J_
Q
F
til
0
ATCT AND TRACON
us AREA Drainage Areas (Acres) COMPOSITE Time of Conc 10 year 10 year 25 year 25 year
oWoods Lawn Irrperv. Gravel Soil Total C Minutes i Q(cfs) i Q(cfs)
rn EX-DA-2 0.00 43.46 18.48 1.05 0.00 63.00 0.48 13.00 5.10 155.67 5.84 178.07
W DA-1 0 00 2 80 0 80 0 38 0-00 3 98 0 47 5 00 7 04 13-12 808 15.06
LU DA-2 0.00 1.07 0.53 0.14 0.00 1.74 0.52 5.00 7.04 6.39 8.08 7.34
Cr) DA-3 0.00 1.19 0.58 0.08 0.00 1.84 0.51 5.00 7.04 6.60 8.08 7.58 STO RMWATER
a DA-4 0.00 1.01 0.49 0.07 0.00 1.56 0.51 5.00 7.04 5.59 8.08 ' 6.42
N Pre&Post Basin 1 DA-5 0.00 0.57 0.27 0.04 0.00 0.88 0.51 5.00 7.04 3.15 8.08 3.62
3 (BypassesBioretentien) DA-6 0.00 0.90 0.45 007 0-00 142 0-51 500 7.04 5-15 808 591 DETAILS
DA-11 0.00 0 42 0.71 0 30 0-00 1 43 070 500 7.04 710 808 8-14 N O •f
LU NO. L
Total 0.00 51.42 22.30 2.13 0.00 75.86 0.49 13.00 5.10 189.81 5.84 217.12
Z
(7 DA-12 0 00 2 70 0 00 0 28 0-00 2 98 0-35 10-00 5 63 5 81 843 864
LU ATTENTION:
O DA-13 0.00 0.14 0.03 0.00 0.00 0.17 0.41 5.00 7.04 0.48 8.08 0.55
DA-14 0.00 0.06 0.15 0.00 0'00 0.22 073 5.00THIS DOCUMENT CONTAINS PRIVILEGED AND PROPRIETARY00 7.04 1.11 6.06 1.27 INFORMATION,ALL OF WHICH IS EXPRESSLY PROVIDED BY AVCON,INC.,
c) DA-15 0.00 0.03 0.03 0.00 0.00 0.06 0.60 5.00 7.04 0.26 8.08 0.30 FOR USE BY THE INTENDED RECIPIENT.AND FOR a SPECIFIC PURPOSE.
~ DA-17 0.00 0.04 0.05 0.00 0.00 0.08 0.63 5.00 7.04 0.37 8.08 0.42 WITHOUT THE EXPRESS WRITTEN CONSENT OF AVCON,INC.ANY
QDISTRIBUTION,REPRODUCTION,OR OTHER USE OF THIS DOCUMENT,IN
> DA-18 0.00 0.07 0.09 0.00 0.00 0.15 0.65 5.00 7.04 0.70 8.08 0.80 WHOLE OR IN PART,IS STRICTLY PROHIBITED
oQ Pre&Post Basin 2 DA-19 000 002 029 000 0-00 031 0-86 500 704 185 808 212 SCALE:N.T.S. AS NOTED
(Sent to Bieretention) DA-20 0 00 0 22 0 02 0 00 0-00 0 24 0-34 500 704 0 58 808 I 0 66
o DA-21 0.00 0.09 0.00 0.00 0.00 0.09 0.30 5.00 7.04 0.19 8.08 0.22
o DA-22 0.00 0.00 0.13 0.00 0.00 0.13 0.90 5.00 7.04 0.80 8.08 0.92 REVISIONS:
a
DA-23 0.00 0.05 0.00 0.00 0.00 0.05 0.30 5.00 7.04 0.10 8.08 0.12 NO. DATE BY DESCRIPTION
Q
o Total 0.00 3.42 0.78 0.28 0.00 4.47 0.44 10.00 5.63 10.97 6.43 12.52
0
NI.
F DA-29 0.00 0.16 0.04 0.00 0.00 0.19 0.41 5.00 7.04 0.56 8.08 0.64
U DA-30 0 00 0 05 0 01 0 00 0-00 0 06 0-36 500 704 0-14 808 0-16
lil
DA-31 0.00 0.05 0.01 0.00 0.00 0.06 0.36 5.00 7.04 0.15 8.08 0.17
O CCDA-32 0.00 0.05 0.01 0.00 0.00 0.06 0.37 5.00 7.04 0.16 8.08 0.18
D. DA-33 0.00 0.06 0.01 0.00 0.00 0.06 0.38 5.00 7.04 0.17 8.08 0.19
Pre&Post Basin 3
Z DA-34 0.00 0.04 0.01 0.00 0.00 0.04 0.37 5.00 7.04 0.11 8.08 0.13
(Sent m BiereIenfion) DA-35 0.00 0.01 0.00 0.00 0.00 0.01 0.30 5.00 7.04 0.03 8.08 0.03
O DESIGNED BY: D.A.S
Q 0 0 0 5 7 0 8 0 DA-36 00 0.17 00 00 0-00 0-17 0-30 00 04 36 08 41
e Total 0.00 0.59 0.07 0.00 0.00 0.66 0.36 5.00 7.04 1.67 4.31 1.02 DRAWN BY: H.C.A.
z CHECKED BY: D.A.S.
Fc Pre&Post Basin 4 DA-7 0.00 1.01 0 00 0 00 0-00 1 01 0-3000 50 704 2-13 808 244
Lil w (Sent ha Biaretention) APPROVED BY: D.A.S.
Z Total 0.00 56.44 23.15 2.41 0.00 82.00 0.4841 13.0 5.10 202.51 5.84 231.64
3 Bioretention Total 0.00 5.02 0.85 0.28 0.00 6.14 0.4052 10.0 5.63 10.00 6.43 15.99 DATE: MAY 2024
Z
w
Y
DRAINAGE CALCULATIONS STATE LICENSE# N.C.C-2450
3 VALUES PROVIDED BY AVCON PROJECT NO. 2022.0157.02E
ci
M
n SHEET NUMBER
`' ` SW-03

r 1 I 1
NOTES:
1. CONTRACTOR TO FIELD VERIFY THE LOCATION OF ALL UTILITIES PRIOR TO CONSTRUCTION ACTIVITY. /
PRE-CONSTRUCTION POST-CONSTRUCTION UTILITY LOCATIONS PROVIDED HEREIN ARE FOR PLANNING PURPOSES ONLY. k,
2. CONTRACTOR SHALL MAINTAIN AND PROTECT ALL EXISTING SIGNS,LIGHTS,EXISTING UTILITIES AND _ I
Forest Grassed CIRCUITS UNLESS OTHERWISE NOTED ON THE PLANS OR UNTIL REQUIRED TO BE REMOVED. _\ Si e V i I I e
Total Imoerv. Grassed Forest
Bl Total Imcerv' Hass 8
3. CONTRACTOR SHALL NOTIFY THE ENGINEER IMMEDIATELY OF ANY DISCREPANCIES IN THE PLANS AND
Basin C CN Tc(min) Basin C CN Tc min SHALL NOT PROCEED UNTIL CLARIFICATION IS PROVIDED.
Area AC 0.95 0.30 0.15 Area AC 0.95 0.30 I "' REGIONAL AIRPORT
4. THE CONTOUR INTERVAL ON THE PLAN SHEET IS 1.0 FT.
98 69 55 98 69 5. CONTRACTOR IS RESPONSIBLE FOR FIELD VERIFYING SUITABILITY OF TIE-INS TO EXISTING STRUCTURES.
Pre1 75.86 24A4 51.43 0.0 0.51 78 10 Post 1 75.86 24.44 51.43 0.0 78 10 6. ALL STORM DRAINAGE PIPES ARE DESIGNED BY OTHERS. 1I��7I Pre 2+3+4 6.14 0.00 6.14 0.0 0.30 69 10 Post2 4.47 1.05 3.42 0.45 76 10 A�/7■` 01 0' 100' 200' 400' 800' 1� V `
Post 3 0.66 0.07 0.59 0.37 72 5 DRAINAGE AREA 1 WILL BYPASS THE BIORETENTION AREA.THIS DRAINAGE AREA 1 IS NOT INCLUDED IN I I I
Post4 1.01 0.00 1.01 0.30 69 5 THE SUPPLEMENTAL EZ FORM OR STORMWATER MANAGEMENT PERMIT APPLICATION FORM AS IT IS NOT
A DRAINAGE AREA TO A PROPOSED SCM. 1"=200'
AVCON,INC.
H / ENGINEERS&PLANNERS
4 F T T T T T T H T T T T T T r 14 I SKINCEYAVENUE,2807E
F ..........1 1 1 1 1 T T 1 1 1 T 1 1 L I I4o xuNreasvn.l,e,NC isoTs
r OFFICE,(904)954,00a
F� // www.evconm�.com
3 / T_L_L_L 1T_T_T_L_L J_ H _L_L _L_L _L_L 1 _
_ RELEASED FOR
• \ T T T� \ CONSTRUCTION
I `�o.s,Vs CAROB%",,
.`.r0.SE5Sia. •7.'yy
C <': 8
I C. J _ = i0 95
L-----) I.
RSA RSA •SA RSA RSA RSA RSA RSA RSA f SA / RSA RSA RSA RSA RSA RSA RSA
1 ASHEVILLE
REGIONAL AIRPORT
FLETCHER
- \ NORTH CAROLINA
DRAINAGE BASIN 1
• \ - - - , BYPASSES BIORETENTION AREA e l
RSA \ RSA RSA RSA RSA RSA RSA RSA RSA RSA •SA RSA RSA RSA RSA RSA -SA RSA
DV
G ill
DV
DV
N = NIII
��� l i@k
KEY PLAN
DV
0 aaaaa� aaaaa�
I EX-DA-2 DA-1 DA-2 DA-3 DA-4 DA-5 DA-6 N
STUDY POINT#1 BYPASS
a
0
() I -- - ATCT AND TRACON
f�
I !_
o
- - - - -Ill
- - - - � � DA� cj 7s' \ ice.__,
_ ,�; / SCM DRAINAGE
o L AREA MAP
- \\� J f-� �,
W DRAINAGE BASIN 2 --\ ,- .,/ ,
0 INCLUDES DA-12, DA-13, DA-14, DA-15, DA-17, -\ ,N� '' /' I W \ ,/ ATTENTION:
o DA-18, DA-19, DA-20, DA-21, DA-22, AND DA-23 '`\���\ , ,
N " THIS DOCUMENT CONTAINS PRIVILEGED AND PROPRIETARY
BIORETENTION DRAINAGE AREA: 4.47 AC �`� \�� , FOR USEBYTHE`INTE oE'DRE�PIENT.ANDFORASPECIFICPURP'OSE.
U WITHOUT THE EXPRESS WRITTEN CONSENT OF AVCON,INC.ANY
< ` \\ - ��j j DISTRIBUTION,REPRODUCTION,OR OTHER USE OF THIS DOCUMENT,IN
QDRAINAGE BASIN 3 �� \„J�, y - WHOLE ORIN PART,IS STRICTLY PROHIBTED
s INCLUDES DA-29, DA-30, DA-31, DA-32, \ �- � � SCALE: 1"=zoo' AS NOTED
DA-33, DA-34 DA-35, AND DA-36 �a REVISIONS:
NO. DATE BY DESCRIPTION
a BIORETENTION DRAINAGE AREA: 0.66 AC B
ZS
DRAINAGE BASIN 4
o INCLUDES DA-7
cL BIORETENTION DRAINAGE AREA: 1.01 AC
z
aDESIGNED BY: D.A.S
BIORETENTION AREA DRAWN BY: H.C.A.
z SEE DETAILS SW-02 &SW-03 CHECKED BY: D.A.S.
W STUDY POINT#1 - BIORETENTION PIPE OUTLET APPROVED BY: D.A.S.
z_
DATE: MAY 2024
z
W
Y
U
D STATE LICENSE# N.C.C-2450
IC. PROJECT NO. 2022.0157.02B
U
Q SHEET NUMBER
SW-04

1 2 3 4 5
I I I I
( ,X, , X, ,X , X, x, ,x X , 6 X , X X3 AX il x,+ A i X,, ,X , X ,i xi x iX i C .iX , X x . 'X , , , X ' , . x x', 'x ,xC . ,x x, . ,x i x ,, x-x POM
/ , , i - SEE SEE SEE SEE ,f I 3500 Parkway Lane
reed-31,369 sf i seed-9,967 sf Suite 500
Peachtree Corners
, ' , , Poo Georgia 30092
.� i, , , , , . , , , i ii, ,' i' FES ARU,i • , , -�� Y I
i ,n ' i . i ce sod-4,7095f--+� ' ' , A ''- X_ Kh.C.. 1
,4�
' (910
SEE SEE ,
FES ARUM SEE 1/L2 ENLARGEMENT SEE ENLARGEMENT S Sod-4,195 sf '
seed-606sf " Sod 2408sf - LANDSCAPE AREA PLAN 1
D LANDSCAPE AREA PLAN 2
w w (�l -_.�', I FES ARU AM i
1-1 K-1 Ot I % I 'gm- ego: veeeeeeeeeeee Sod-2,426sf
rI
110? + FOR/AOR SEAL
���TT7�¶�VRrr I �11 �;]
, , K-i0i :� ®' _.-'.� ..2...,_.. - �I JI `II I [ ; i T�� : y : _ 1II 'F J SEE 2/L1 ENLARGEMENT/ SEE
seedE 9,455 sf
,0 e.e , '®' • H SEE 3/L2 ENLARGEMENT '� W LANDSCAPE AREA PLAN
OO' , „rJ \t LANDSCAPE AREA 1 111 L 1 1111 \ , WESTFELDT ROAD �'
.• , .. PLAN 3 0 0 [ - --. 1 o " o ° o o 'ill 0 . '
, , lit•0 \.,
, :4),,‘' -.�' il' �l_!,�.`,• '®' �, fa I FFS ARU ,
Oe �1 C`T--(` 11% ■ f:. 1 I I [ oa-2a,BB1sf , i ,
, JUN TOR, ( '®' �I �_�V :� 1�� ♦. -_- I: R I - �.. 'III COA STAMP
15 gal-12, CJ __. - ® ,�� 1 4�J. �r =j" 0 1.
CC i ' , C CC i. C iC C \ i ;\
FEE ARU
Soc-231 sf IL _�
�� ,P i , � ,P _.�I�EJIeflBliaa�rl>Pr81 - 111 ‘,44 .
1w ®� Ienasceo nu I
' ,i THUEME i, , , FES ARU , ® ' ® ' ®, ' ®w i r- ," �� �`074 1' ' . u0
' ' ,15 gal-6 , , ' , ' , ' Sod 70 sf r , , + + . i C y. ' Lo"meoesa o,m n, _n T n e o.tom
,
, , , , ,
, , , ,
, CLIENT INFORMATION
O OVERALL LANDSCAPE PLAN SEE SEE
C seed-65,787 sf
SCALE:1"=40'
sheville
REGIONAL AIRPORT
GENERAL LANDSCAPE NOTES PROJECT NAME
FES ARU \ \\\
GREATER ASHEVILLE
1. MATERIALS LIST WAS PREPARED FOR ESTIMATING PURPOSES,CONTRACTOR SHALL MAKE OWN QUANTITY TAKE-OFF USING FES ARU Sod-4,195 sf REGIONAL AIRPORT
DRAWINGS AND SPECIFICATIONS TO DETERMINE QUANTITIES TO HIS SATISFACTION,REPORTING PROMPTLY ANY Sod-24,881 5f AUTHORITY ATCT&
DISCREPANCIES WHICH MAY EFFECT BIDDING. TRACON
2. ROOT TYPES MAY BE FREELY SUBSTITUTED IN CASE OF BALLED AND BURLAPPED OR CONTAINER GROWN.ALL PLANT
MATERIAL MUST ADHERE TO ANSI Z60.1-2004(AMERICAN STANDARD FOR NURSERY STOCK)SPECIFICATIONS FOR ROOT PRU OTT REFERENCE NOTES SCHEDULE
BALLS AND CONTAINER SIZES. 3 gal-18"HT.Min.-2 O.
3. CONTRACTOR TO VERIFY THAT ALL PLANT MATERIALS ARE AVAILABLE AS SPECIFIED WHEN BID/PROPOSAL IS SUBMITTED. 01 GENERAL
4. UNLESS SPECIFICALLY NOTED,ALL PLANTS SHALL BE OF SPECIMEN QUALITY,EXCEPTIONALLY HEAVY,SYMMETRICAL,AND / SYMBOL DESCRIPTION QTY Mills ai.",.NC z3732 DRAWING ISSUE
SO TRAINED OR FAVORED IN DEVELOPMENT AND APPEARANCE AS TO BE UNQUESTIONABLY AND OUTSTANDINGLY PAN SHE
SUPERIOR IN FORM,COMPACTNESS AND SYMMETRY.THEY SHALL BE SOUND,HEALTHY,VIGOROUS,WELL BRANCHED AND 1 gal-1 SURE-LOC 1/4"THK.STEEL EDGING(BLACK) 445 LF
DENSELY FOLIATED WHEN IN LEAF;FREE OF DISEASE AND INSECTS,EGGS OR LARVAE;AND SHALL HAVE HEALTHY, - ry w
WELL-DEVELOPED ROOT SYSTEMS.THEY SHALL BE FREE FROM PHYSICAL DAMAGE OR OTHER CONDITIONS THAT WOULD (WWW.SURELOCEDGING.COM) Cl'
PREVENT VIGOROUS GROWTH. 32 EXTERIOR IMPROVEMENTS
5. SUBSTITUTIONS OF PLANT MATERIALS WILL NOT BE PERMITTED UNLESS AUTHORIZED IN WRITING BY THE LANDSCAPE • SYMBOL DESCRIPTION QTY
ARCHITECT.IF PROOF IS SUBMITTED IN WRITING THAT A PLANT SPECIFIED IS NOT OBTAINABLE,CONSIDERATION WILL BE
GIVEN
TO THE NEAREST AVAILABLE SIZE OR SIMILAR VARIETY,WITH A CORRESPONDING ADJUSTMENT OF THE CONTRACT 13p.p7 I TRIPLE HAMMERED HARDWOOD MULCH(3"THICK) 23.48 CY
PRICE. z
6. PLANTS SHALL CONFORM TO THE MEASUREMENTS SPECIFIED,EXCEPT PLANTS LARGER THAN THOSE SPECIFIED MAY BE USED 0
IF APPROVED BY THE LANDSCAPE ARCHITECT IN WRITING.USE OF LARGER PLANTS SHALL NOT INCREASE THE CONTRACT - .- - - - (5
PRICE.IF LARGER PLANTS ARE APPROVED,THE ROOT BALL SHALL BE mlrRFecFnNPPnPnRT PROPORTION TO THE SIZE OF THE PLANT. - - m ROCK
7. ROOT FLARE OF PLANT MATERIAL MUST BE AT OR SLIGHTLY HIGHER✓THAN EXISTING GRADE.PULL MULCH BACK 6 IN.FROM - SYMBOL DESCRIPTION QTY O
ROOT FLARE. a
8. TREES WITH MULTIPLE LEADERS,UNLESS SPECIFIED,WILL BE REJECTED.TREES WITH A DAMAGED OR CROOKED LEADER, JUN LPN �� 3�.) ®' TAN RIVER STONE-3-4"SIZE 19.66 CY 00 tt
BARK ABRASIONS,SUNSCALD,DISFIGURING KNOTS,INSECT DAMAGE,CUTS OF LIMBS OVER 20MM Ph IN.)IN DIAMETER - - l gal-9 �1��1 0 w
THAT ARE NOT COMPLETELY CLOSED OR FLUSH PRUNING CUTS THAT DO NOT PRESERVE THE COLLAR AT THE BRANCH WILL
B BE REJECTED.
9. TREE PLANTING DETAILS AND SPECIAL PROVISIONS FOR PLANTING MUST BE FOLLOWED. _w -w -wwvy -W NOTE: LANDSCAPE ARCHITECT:
THE BOUNDARY,TREE LOCATIONS AND TOPOGRAPHIC CR
10. CONTRACTOR SHALL TEST SOIL pH AND CONDITIONS FOR ALL SOD AREAS TO INSURE THAT PROPER SOIL REQUIREMENTS PAN SHE /n
INFORMATION REPRESENTED ON THIS DRAWING S IN RELIANCE The LandArt Design Group,Inc.
ARE MET FOR THE SODDED LAWN.SOIL SHALL BE AMENDED BY CONTRACTOR AS INDICATED BY SOIL TEST AND SEE SEE 1 gal-1
- OF THE INFORMATION PROVIDED BY THE PROJECT CIVIL
SPECIFICATIONS TO ACHIEVE PROPER SOIL CONDITIONS. Seed-65,787 sf \\ P.O.Box 3161
C y ENGINEER.REFER TO THE CIVIL ENGINEERING DRAWINGS FOR
11. ALL PLANT BEDS TO RECEIVE 3"DEEP HARDWOOD MULCH,PULLED 6"AWAY FROM THE TRUNK. DETAILED SURVEY INFORMATION. Spartanburg,SC 29304
12. CONTRACTOR TO MAINTAIN THE PLANTINGS AND CONTROL WEEDS IN MULCH AREAS THROUGH THE DURATION OF p g' Q
CONSTRUCTION UNTIL FINAL ACCEPTANCE. 7 3 gal P18"HHTRU �Min.-2 IF ANY DISCREPANCIES ARE DISCOVERED TO THE EXTENT THEY Phone: [phone] a
13. IN THE PLANT SCHEDULE,PLANTS NOTED AS"SPECIMEN",SHALL BE SELECTED BY THE LANDSCAPE ARCHITECT AT THE __\\ REQUIRE CHANGES OR CORRECTIONS TO DESIGN OR Fax: [phone]
NURSERY OR PHOTOS OF THE PLANTING STOCK SHALL BE SUBMITTED TO THE LANDSCAPE ARCHITECT FOR APPROVAL. 7 \ CONSTRUCTION,PLEASE CONTACT THE PROJECT ENGINEER
Y TO HERBICIDE
SHALLBE APPLIED O PLANTING INN AREAS PRIOR O LANDSCAPE INSTALLATIONAND ACCORDING NNAMED OTIFY THEOTHEFIRST
LANDSCAPE ARCHITECT OF THIS
CT DRNAAWINGED PACKAGE HIS EET AND
DESIGNED BY: TP
15. PLANT RED R MANUFACTURER'SINSTRUCTIONS.E TENSTD FOR pH AND AMENDED PRIOR TO INSTALLATION! ""^^^^^n^"^ y T IMMEDIATELY. Tipton Pitts,ASLA DRAWN BY: CL
16. ALL PLANT MATERIAL SHALL CONFORM TO STANDARD SET FORTH BY"AMERICAN STANDARDS FOR NURSERY STOCK"ANSI _\ [e-mail] CHECKED BY: TP
Z60.1-2004 PUBLISHED BY THE AMERICAN NURSERY AND LANDSCAPE ASSOCIATION. 7 THIS DRAWING SERVES ONLY AS A REFERENCE AND THE
17. ALL PLANT MATERIAL SHALL BE PROTECTED DURING TRANSPORT AND DELIVERY TO JOB SITE WITH SHADE CLOTH OR OTHER .\ ,\ /7 CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING AND SUBMITTED BY: TP
ACCEPTABLE MEANS OF WINDBURN PREVENTION. MARKING ALL UTILITIES ON SIRE.THE LANDAR'DESIGN GROLP,
18. ANY SUBSTITUTIONS IN SIZE AND/OR PLANT MATERIAL MUST BE APPROVED BY THE LANDSCAPE ARCHITECT BEFORE © INC.ASSUMES NO LIABILITY FOR ITS ACCURACY OR STATE OF DATE: 21,December 2022
ENLARGEMENT LANDSCAPE AREA PLAN WESTFELDT ROAD COMPLETION,OR FOR ANY DECISION(REQURINGACCI,RACY)
PLANTING CAN BEGIN. PROJECT#: 16035-03
19. ALL TREES MUST BE STRAIGHT TRUNK,FULL HEADED,AND MEET ALL REQUIREMENTS SPECIFIED. my SCALE:1"=10' WHICH THE USER MAY MAKE BASED ON THIS INFORMATION.
20. PRIOR TO CONSTRUCTION,THE CONTRACTOR IS RESPONSIBLE FOR LOCATING ALL UNDERGROUND UTILITIES AND SHALL SHEET TITLE
AVOID DAMAGE TO ALL UTILITIES DURING CONSTRUCTION.SHOULD THE CONTRACTOR CAUSE DAMAGE TO ANY UTILITIES,
NECESSARY REPAIRS SHALL BE MADE AS QUICKLY AS PRACTICABLE,AT CONTRACTOR'S EXPENSE. PLANT SCHEDULE Sheet List Table OVERALL LANDSCAPE PLAN
21. ALL ELEMENTS OF LANDSCAPING SHALL BE INSTALLED SO AS TO MEET ALL APPLICABLE ORDINANCES AND CODES
REQUIREMENTS.
22. CONTRACTOR SHALL ASSURE DRAINAGE AND PERCOLATION OF PLANTING PITS PRIOR TO INSTALLATION OF PLANT TREES QTY BOTANICAL/COMMON NAME CONT Sheet Number Sheet Title
CONTRACTORm RESPONSIBLE FOR THE REPLACEMENTALL PLANTS LOSTr:�u TO INADEQUATE DRAINAGECONDITIONS THUEME 12 THUJA OCCIDENTAL'S'EMERALD'/EMERALD ARBORVITAE 15 GAL Li OVERALL LANDSCAPE PLAN
23. BALLED AND BURLAP MATERIAL SHALL HAVE THE TOP ONE HALF(1/2)OF THE BURLAP AND STRAPS REMOVED.24. CONTRACTORS SHALL REFER TO THE LANDSCAPE PLANTING DETAILS,PLANTS LISTS,GENERAL NOTES AND THE PLANTING SHRUBS QTY BOTANICAL/COMMON NAME CONT L2 ENLARGEMENT LANDSCAPE PLANS
SPECIFICATIONS FOR COMPLETE LANDSCAPE PLANTING INSTRUCTIONS. ABE RO9 10 ABELIA X'ROSE CREEK'/ROSE CREEK ABELIA 3 GAL-18"HT.MIN.
95 CONTRACTOR TO PSNVIrlF COra CERTIFICATION RFFORF INCTAI IATION 20 EX CORNUTA'BURFORDII NANA'/DWARF BURFORD HOLLY 3 GAL-18"HT.MIN.
A 26. TURF GRASS SHALL 3E PLANTED AFTER ALL PLANTS ARE INSTALLED AND MULCHED.SEED AND/OR SOD BED PREPARATIONS ITE VIR 24 ITEA VIRGINICA'VIRGINIA'/VIRGINIA SWEETSPIRE 3 GAL-18"HT.MN. SENSITIVE SECURITY
BY MEANS OF PULVERIZATION TO LOOSEN SOIL.SMOOTH AND FINE GRADE AREA REMOVING ANY ROCKS,ROOTS,TRASH, JUN LPN 9 JUNIPERUS CONFERTA'ALL GOLD'/ALL GOLD SHORE JUNIPER 1 GAL INFORMATION
AND CLODS OVER ENTIRE AREA. PAN SHE 23 PANICUM VIRGATUM'SHENENDOAH'/BURGUNDY SWITCH GRASS 1 GAL
27. THE CONTRACTOR IS RESPONSIBLE FOR MAINTAINING IN FULL ALL PLANTING AREAS(INCLUDING WATERING,SPRAYING, PRU OTT 24 PRUNUS LAUROCERASUS'OTTO LUYKEN'/OTTO LUYKEN ENGLISH LAUREL 3 GAL-18"HT.MIN. CONTROLLED UNDER 49
MULCHING,MOWING,FERTILIZING,ETC.)UNTIL THE OWNER AND LANDSCAPE ARCHITECT ACCEPT CONSTRUCTION IN FULL THU CON 18 THUJA OCCIDENTALIS'CONGABE^/FIRE CHIEF GLOBE ARBORVITAE 3 GAL-18"HT.MIN. 811
CFR PARTS 15 AND 1520.
&FINAL PUNCH LIST COMPLETED/ACCEPTED IN WRITING. THU GOL 6 THUJA OCCIDENTALIS'GOLDEN GLOBE'/GOLDEN GLOBE ARBORVITAE 3 GAL-18"HT.MIN.
28. CONTRACTOR TO GUARANTEE PLANT MATERIAL FOR A 12 MONTH ESTABLISHMENT PERIOD BEGINNING AT THE OWNERS SHEET NUMBER
FULL ACCEPTANCE OF THE PROJECT. GROUND COVERS QTY BOTANICAL/COMMON NAME CONT SPACING
FES ARU 39,012 SF FESTUCA ARUN DINACEA/TALL FESCUE SOD I
SEE SEE 117,184 SF SEED MIX/PERMANENT GRASSING(SEE ENG.SPEC.) SEED Know what's below. 0 40 80 120 feet
Call before you dig- \ SHEET L1 OF L2
SCALE:1"=40'
3 WORKING DAYS DEFORM°DIG ORIGINAL SHEET SIZE:
22"X 34"
CCCF,,ou-e,�s�s a�„e.„�,f f.f v expressed/0 rights reserved„ie,a oe-e,n of or duplication or Pond"cio-a, WARNING:THIS RECORD CONTAINS SENSITIVE SECURITY INFORMATION THAT IS CONTROLLED UNDER 49 CFR PARTS 15 AND 1520.NO PART OF THIS RECORD MAY BE DISCLOSED TO PERSONS WITHOUT A"NEED TO KNOW",
these AS DEFINED IN 49 CFR PARTS 15 AND 1520,EXCEPT WITH THE WRITTEN PERMISSION OF THE ADMINISTRATOR OF THE TRANSPORTATION SECURITY ADMINISTRATION OR THE SECRETARY OF TRANSPORTATION. ISSUED FOR CONSTRUCTION
UNAUTHORIZED RELEASE MAY RESULT IN CIVIL PENALTY OR OTHER ACTION.FOR U.S.GOVERNMENT AGENCIES,PUBLIC DISCLOSURE IS GOVERNED BY 5 U.S.C.552 AND 49 CFR PARTS 15 AND 1520.

1 2 3 4 5
I I I I
• FES ARU •
•
• _ •
• - •
• FES ARU ��
Sod 2,408 sf •
• •
- S• od-24,881 sf •
-w;— —w —w —w w —w —w —w w w —w —w — w —w —w —w. �' V ,+• —'w —w.; w —w —w —w — w w —w —W —w —w -w - 3500Parkwa0Lane
•
te
—• w —w —w•—w —w —w —w —w.—w —w —w —w w —w -`w w ELT w —w —.w —w —w —w —w `_lw —w —w —w —w —.w —• w Peachtree Corners
riucoL • Georgia 30092
•
3ga1-18"HT,Min. 3 FES ARU
• Sod-4,709 sf n
ABE R09 • _•
•
_ • ?�M c _
3 gal 18"HT.Min. 5 ' . •-•
•
r, r,
•
ABE R09 I • \ OO I < ' t'
11 1111 �
p - Ol-Ol - • 3gal-18"HT.Min. 5 _ - 0v 0
•
• -- IlHHIMi
n.-9 • 3 gal-18"HT.Min.-3. PAN SHE
• _ •
- 1 gal-10 I
FOR/AOR SEAL
• . • L-11111111Ir
•
•
I C I I I I ;, D,-D, b u •. NM U -
T T T T T� _ * �� T T T T �I�
ono 000 Fao•o•o•0O0•01�"Vtl �' ..�h , i , , L�
1�� �I �j �`� A'tAt I , — ITE VIR —
�.���mi���A =n ew ���.TES_ �_ /r K-101 I I ���� Vgal-18"HT.Min.-2
\ ENLARGEMENT LANDSCAPE AREA PLAN 1 SCALE:1"=10' :ol)— ' 3 gal-18"HT.Min.-9 COA STAMP
IIIPINIAKIF
1� jD
•
3gal landscape ure
•
I I8VIR. .
• I
I noesa o
—w �—w• —w —� �w wl I w —w - - Lo.m
w —w � � El El
n, .,nT ne v.�om
PAN SHE •
y - _
1 • \ ITE VIR ••
1 - CLIENT INFORMATION
C + 3 ga1-18'HT.Min.-20
•
o
OTOTOTOTO • • ILE BUNS_
1 1R1B1 3ga1-18 HT.Min.-20 i I - J Sheville
REGIONAL AIRPORT
�TII • s ' _ _ - / ENLARGEMENT LANDSCAPE AREA PLAN 3 PROJECT NAME
y� 7 I 7 7 \ w — w —w w —'w —w —w —,A—W 1C v SCALE:1"=10' GREATER ASHEYILLE
U o�,41s \ , �� x �� / _\ L REGIONAL AIRPORT
V..) . OF�� AUTHORITY ATCT R
} TRACON
off• GENERAL LANDSCAPE SPECIFICATIONS
DERs�ArvDBROKEN voR DEAD BRANCHES.
LANDSCAPE PLANTING AND RELA ILD WORK SHALL BE PERFORMED BY A F RED WITH A MINIMUM OF FIVE EARS EXPERIENCE SPECIALIZING IN THIS MIIIs RI.er.NC 23732
1.16
- • o' WIGS AND LATERAL BRANCIOS In PTFUfROMiHE TYPE OF WORK.ALL CONTRACTORS AND THE RSUB CONTRACTORS WHO WILL BE PERFORMING ANY LANDSCAPE WORK INCLUDED IN THIS SECTION
a
'� o�xowevER.DO NOT REMOVE ARBORICULTURE
SOCIETY of -�l(''� LR DRAWING ISSUE
},�� BUDS or BRANCHES THAT EXTEND ff��/ S lam^ OF THE SPECIFICATION SHALL BE APPROVED Ii�IHE LANDSCAPE ARCHITECT.
n ( G..AG.G.�.CROWN,APPROVAL
/` O0.CDLNRE NOTE: IE(GREEN) —, ....JJJJ 11111 CQNTRAOTRIO R C I IBMITTALs: `
\ or THE LANDSCAPE ARCHITECT. NOTE:USE ARBOR/KNOT A.PRIOR TO PLANT MATERIAL ACCEPTANCE SUBM T`WRITTEN MAINTENANCE INSTRUCTIONS RECOMMENDING ADEQUATE AND REASONABLE Si
STAKE TREES ONLY UPON THE
ACCORDING TO PROCEDURES FOR MAINTENANCE OF PLAN I MATERIALS. ry r
MANUFACTURER'S DIRECTIONS B. PROVIDE PLANT MATERIAL RECORD DRAY/NGS: S a0
1. LEGIBLY MARK DRAWINGS TO RECORD ACTUAL CONSTRUCTION.
2. INDICATE HORIZONTAL LOCATIONS.REFERENCED TO PERMANENT SURFACE IMPROVEMENTS.
•
PRU OT( 3. IDENTIFY FIELD CHANGES OF DIMENS ON AND DETAIL AND CHANGES MADE BY CHANGE ORDER.
3 gaI-18"HT.Min.-20 NURSERY, ROTATEREEYO TREE MUST BE SUCH THAT THEPREPARATION:
AT SITE WHEN EVEA.UTILITY VERIFICATION:CONTRACTOR WILL BE RESPONSIBLE FOR DAMAGES TO ANY UNMARKED UTILITY.
REMOVE ALL BURLAP Z
POSSIBLE. `EACH
x o OSNo AND WIRE BASKET fROM MAX.4STEMS 1. THE CONTRACTOR SHALL CONTACT THE LOCAL UTILITY COMPANIES FOR VERIFICATION OF THE LOCATION OF ALL UNDERGROUND UTILITY 0
FACE NORTH MULCH G / vsBLEIIALLBBBLEcYEurvooxO o0ERYHE TOP1/30FROOT BALL LINES IN I'HE AREA OF THE WORK.THECONTRACTOR SHALL BE RESPONSIBLE FOR ALL DAMAGE RESULTING FROM NEGLECT OR FAILURE 10 F
- SEE SEE • FCRnoe oe 2s-sa IBMMMn�z ma ,. TOP OP THE ROOT soaRTc O
MOO MM(S R.)DIAM MIN. COMPLY WITH THIS REQUIREMENT. P
......,._�,.......a..."
_ seed-65,787 Sf` ../.., HIGHER In SLOWLY DRAINING SOILS. B. SOIL CONDITIONING:
WATER SAUCER f 1. CONTRACTOR SHALL BE RESPONSIBLE FOR A SOIL TEST REPORT BEFORE CONSTRUCTION START:PROVIDE REPORT TO OWNER,GENERAL r~/1
zoo WA(e IN.) SET BALL 2"HIGHER THAN CONTRACTOR,AND LANDSCAPE ARC)I'TECT. Zp A
n DD AWN(0 IN.)HIGH EARTH SAUCER FINISHED GRADE 2. COORC NATE AND PROVIDE ALL SOIL CON TIONING REQUIREMENTS BASED ON THE SOIL TESTING. 'CC'
K
mMM3 IN I MULCH.DO HOT BEYOND EDGEOF BOOT BAH_ 3"MULCH LAYER INSTALLATION: 0 N
REMOVE ALL TWINE,ROPE AnowRE,Axo BURLAP O w
A.PLANTS SI IALL BE SET ON FLAT-TAMPED OR UNEXCAVATED PADS AT THE SAME RELATIONSHIP TO FINISHED GRADE AS THEY WERE TO THE GROUND ❑
B MULCHWEED.FRFF FOR A MINIMUM FROM TOP HALF OF ROOT BALL — III III—I ❑
BERM �I ILJ)III II FROM Y/H CH THEY WERE DUG,UNLESS OTHERWISE NOTED ON THE DRAY/NGS.PLANTS MUST BESET PLUMB AND BRACED IN POSITION UNTIL w
FES ARU THREE YEARS AFTER PLANTING IF PLANT s SHIPPED wrtxAwREBMRET AROUND - - TOPSO L OR PLANTING MIX HAS BEEN PLACED AND I AMPED AROUND I HE BASE OF THE ROOT BALL.IMPROPER COMPACTING OF THE SOILROO a
roLUToowN Zoo mm(B n)LMOr MIND HOLE BALL.CUT THE WIRE BASKET IN FOUR PLACES AND (3)2x4 STAKES,2.6'LONG III IL"' AROUND TI IE ROOT BALL MAY RESULT IN THE TREE SETTLING OR LEAN NG.PLANTSSHALL BE SET SO THAT THEY WILL BE AT THE SAME DEPTH AND SO N
Sod 24,881 sf rn
n / sEPF FIRMLY wnx wor��L PLACE ROOT BALL ON UNEXCAVATED PLANTING SOILI I I THAT IHE ROOT BALL DOES NOT SHIFT OR MOVE LAI ERALLY ONE YEAR LA I ER.
TAAROUND
BEFORE_
NOTE PROPER PLANTINGDEPTH REQUIRES THE ROOT FLARE TOBE AT OR SLIGHTLY ABOVE THE FINISHED GRADE IT IMPORTANTDETERMINE
x BASE
so THAT ROOT BALL TAMPED sox MOuIDEEP OTHE ROOT FLARE c K THE
QUeLL S �.,oF,cPLACED K uGKr HOLE.OSOMETIMESS,M=TOPnF.M ISALL O TO
y ""°'^"'^ �,1T�,w.C. �,12�,w.C, UNTIL THE ROOT FLARE IS AT THE PROPER PLANT NG DEPTH AND/OR SOIL MUST BE REMOVE FROMTHE TOP OF THE BALL.B"ev NEED TO BE,,,"�� Y
24"MEDIAN 24"MEDIAN 1. DETERMINE THE ELEVATION OF THE ROOT FLARE AND ENSURE THAT IT IS PLANTED AT GRADE.THIS MAY REQUIRE THAT THE TREE BE SET DA Q Q
H GHER I HAN THE GRADE IN THE NURSERY. E
\ I-I CANOPY TREE PLANTING DETAIL UNDERSTORY TREE PLANTING DETAIL 2. IF THE ROOT FLARE IS LESS THAN 50MM(2IN.)BELOW THE SOIL LEVEL OF THE ROOT BALL,PLANT AT THE TREE THE APPROPRIATE LEVEL
_A l`J�� ABOVE THE GRADE TO SET THE FLARE EVEN WITH THE GRADE.IF THE FLARE IS MORE THAN 50 MM(2 IN)AT THE CENTER OF THE ROOT BALL
ereL e•N T e =_•_....-.,..,. THE TREE SHALL BE REJECTED. DESIGNED BY: TP
GUARANTEE PERIOD AND REPLACEMENT:
A.THE OWNER OF FEE TITLE TO ANY PROPERTY ON WHICH PLANT MATERIAL HAS BEEN ESTABLISHED IN ACCORDANCE WITH AN APPROVED DRAWN BY: CL
REMOVE ALL TAGS,TIES,ETC. LANDSCAPE/PLANTING PLAN,SHALL BE RESPONSIBLE FOR THE MAINTENANCE,REPAIR,AND REPLACEMENT OF THE APPROVED PLANT MATERIAL,
U 1 FROM SHRUB AS REQUIRED BY THE ORDINANCE. CHECKED BY: TP
+ B. THE GUARANTEE PERIOD FOR TREES AND SHRUBS SHALL BEGIN Al THE DATE OF ACCEPTANCE. SUBMITTED BY: TP
y - FACE FULLEST SIDE OF PLANT / C.THE CONTRACTOR SHALL GUARANTEE ALL PLANT MATERIAL TO BE IN HEALTHY AND FLOURISHING CONDITION FOR A PERIOD OF ONE YEAR FROM
TO THE OUTSIDE OF a THE DATE OF ACCEPTANCE. DATE: 21,December 2022
GROUPINGS D.WHEN WORK IS ACCEPTED IN PARTS,THE GUARANTEE PERIODS EXTEND FROM EACH OF THE PARTIAL ACCEPTANCES TO THE TERMINAL DATE OF
\ '� THE GUARANTEE OF THE LAST ACCEPTANCE.THUS,ALL GUARANTEE PER ODS TERMINATE AT ONE TIME. PROJECT#: 16035-03
Wil _ LOOSEN BURLAP TIES OR o E. THE CONTRACTOR SHALL REPLACE,WITHOUT COST,AS SOON AS WEATHER CONDITIONS PERMIT,AND WITHIN A SPECIFIED PLANTING PERIOD,ALL
3 _' PLANTS D ETERM NED B"TI IE LANDSCAPE ARCI I TECT TO BE DEAD OR IN AN UNACCEPTABLE CON TON DURING AND AT TILE END OFT)IE SHEET TITLE
REMOVE CONTAINER q�.,. I V GUARANIES PERIOIJ.IO BE CONS)L;EREIJ ACCEPTABLE,PLANTS SHALL ITE FREE OF DEAD OR DYING BRANCHES AND BRANCH TIPS AND SHALL
1 T,v � ') BEAR FOLIAGE OF NORV�AL L;ENSII R.S LE,AND COLOR.REPLACEMEN IS SHALL CLOSELY MATCH ADJAC EN SPEC MENS OF THE SAME SPECIES. ENLARGEMENT LANDSCAPE
REPLACE''.'NTs SI)ALL BE SUBJECT TO//LL REQUIR6''S ENTS STATED IN TI LS SPEC FICAT ON. PLANS
SET BALL 3"HIGHER THANWO
F. THE GUARANTEE OF ALL REPLACEMEN)PLAN IS SHALL EXTEND FOR AN ADDII,C NAL PERIOD OF ONE YEAR FROM SHE DATE OF THEIR
FINISHED GRADE ¢ac. r' NOTES: ACCEPTANCE AFTER REPLACEMENT.NTI IE EVENT THATA REPLACEMENT PLANT SNOT ACCEPTABLE CURING OR AT THE END OF SAD EXTENDED
- _ .\ WATER 111 TO.C.SPACINGI 1 PRF'E PLANTING BED WITHTBEE GIARA'-�DOFT EGUA GUARANTEE,THE
`CIORS MAY EL RESET SEQDE'-�`REPLACE•vENT QR ULEDBELO FOR A'PROPOSED
jr.
/ \�\] LA Lre of ANTS
SOIL MIXTURE. G.DAT RAWINGS.
END OF THE GUARANTEE,THE CONTRACTOR SHALL RESET GRADES THAT HAVE SETTLED BELOW IHt PROPOSED GRADES ON THE
.E ALL 2. PL :F i IN PREPARED BEDS, DRAWING$
3"MULCH LAYER SPACING A clad D. H.THE CONTRACTOR SHALL MAKE PERIODIC INSPECTIONS,Al NO EX RA COST,DURING THE GUARANTEE PER OD 10 ULIERM NE JJHA I CHANGES,IF
MULCH
3 LIE II"H i:)T BRAS ANY,SHOULD BE MADE N IHE MAINTENANCE PROGRAM.IF CHANGES ARE RECOMMENDED,IHE"SHALL BE SUBMITTED IN Y/R LING i0 THE
D - - I I ���� SET }P pRovE PIANI1NGBOIL\ PRIOR To nvTIN.,.ROOT BOUND LANDSCAPE ARC)IITECT.CLAIMS BY THE CONTRACTOR THAT THE OY/NER'S MANTENANCE PRACTICES OR LACK OF MAINTENANCE RESULTED IN
II—III1.
I II ,I I i � III=Tli=1 ° 1 RRI-,APLANT wI_NOT G BED ALLOWED.
A I ) BERM i z �- i Ri. DEAD OR DYING PLANTS Y/LL NOT BE CONS DERED IF SUCH CLAI,'v�5 HAVE NOI BEEN DOCUMENIEL;BY THE CONTRACTOR DURING THE
I �1 GUARANTEE PERIOD. SENSITIVE SECURITY
NATIVE BACKFILL EIII . II m I� II� �II�S INFORMATION
-,- —==—�— =_•
R R R R n=il CFR PARTS 15 AND 15 UNDER 49
/ COMPACTED PLANTING SOIL �IUI IIliTI—III JJ °°°°-° 811
SHEET NUMBER
y 1 9„ l 19„ J
0 10 20 30 feet
Ark ENLARGEMENT LANDSCAPE AREA PLAN 2 AIM SHRUB PLANTING DETAIL GROUNDCOVER PLANTING DETAILS Know what's below. ,
® SCALE:1"=10' ® SCALE:N.T.S. yr SCALE:N.T.S. Call before you dig. SCALE:1"=10' SHEET L2 OF L2
YOU PRE REQUIRED TO MUM'MST ORIGINAL SHEET SIZE:
a WORK!.DAYS BEFORE'MUM 22"XT34"
WARNING:
IS RECORD
NS
E SECURITY
THAT IS
LLED UNDER 49 CFR
RT OF THIS RECORD
Y BE DISCLOSED TO
S WITHOUT A
mese.eee e,ReaHAMyil,nn:We exnresseD H-Genawee entotWnDaE nann AS DEFINED FINN 49 CFR PARTS 151AND 1520,ITI EXCEPT WITH THE WRITTEN NPERMISSION OF THEADMINISTRATOR OF PARTS
THE TRANSPORTATIONASECURITY ADMINIISTRATION OR THE SECRETARYOFITRANS TRANSPORTATION.
TO KNOW", ISSUED FOR CONSTRUCTION
RUC I ION
UNAUTHORIZED RELEASE MAY RESULT IN CIVIL PENALTY OR OTHER ACTION.FOR U.S.GOVERNMENT AGENCIES,PUBLIC DISCLOSURE IS GOVERNED BY 5 U.S.C.552 AND 49 CFR PARTS 15 AND 1520. S

Environmental
NCDEQ Stormwater Design Manual Quality
A-7. SCM Operation & Maintenance
Chapter Contents
• Access & Maintenance Easements
• Inspection & Maintenance Agreements
• Inspection & Maintenance Record Keeping
• Maintenance Responsibilities
• Providing for Maintenance Expenses
• Emergency Maintenance
• Debris & Litter Removal
• Sediment Removal & Disposal
• Stability & Erosion Control
• Maintenance of Mechanical Components
• Vegetation Maintenance
• Maintenance of the Aquatic Environment
• Insect Control
• Maintenance of Other Project Features
The Importance of Maintaining SCMs
SCMs are crucial in protecting water quality from the impacts of development. However, no
matter how well they are designed and constructed, SCMs will not function correctly nor
remain attractive unless they are properly operated and maintained. Maintenance problems
with SCMs are also less costly to correct when they are caught early.
Regular inspection and maintenance is an ongoing regulatory responsibility for most required
SCMs—These responsibilities typically include regular inspections throughout the year,
maintaining inspection records, and often annual inspections and reporting. A qualified
professional should conduct SCM inspections. NC State University offers a SCM Inspection
and Maintenance Certification Program: http://www.bae.ncsu.edu/topic/bmp-im/ There are
also many companies in NC that specialize specifically in SCM inspection and maintenance.
This chapter will discuss the logistical issues associated with SCM operation and
maintenance as well as provide an overview of some of the typical tasks associated with
maintaining most SCMs. Each of the individual SCM chapters in this manual also include a
table explaining specific inspection and maintenance activities required for a particular SCM
to ensure its proper functioning.
A-7. SCM Operation & Maintenance 1 Revised: 2-11-2018

NCDEQ Stormwater Design Manual Environmental
Access and Maintenance Easements
SCMs on private property should have access and maintenance easements to provide
the legal authority for inspections and maintenance activities. The location and
configuration of easements should be established during the design phase and be
clearly shown on the design drawings. The entire footprint of the SCM system should be
included in the access and maintenance easement, plus an additional ten or more feet
around the SCM to provide enough room for the equipment and activities necessary to
complete maintenance tasks. This SCM system includes components such as the side
slopes, forebay, riser structure, SCM device, and basin outlet, dam embankment, outlet,
and emergency spillway.
Access and maintenance easements should be designed and constructed considering
the maintenance tasks that may be needed. If heavy equipment will be necessary to
perform maintenance tasks (such as for devices with a forebay that will require
sediment clean-out), typically a roadway with a minimum width of ten feet to the SCM
needs to be available. Easements are usually held by the person responsible for the
SCM facility, whether an individual, a corporation, or a government. Easements for
SCMs that are not publicly maintained require provisions that allow the permitting entity
access for inspection and maintenance.
Inspection & Maintenance Agreements
SCM facilities are typically built, owned and maintained by non-governmental entities. To insure
proper long-term maintenance, an Inspection and Maintenance Agreement should be part of the
design plans for any SCM. For regulatory purposes, authorities may require that these
agreements be signed and notarized. An Inspection and Maintenance Agreement will typically
include the following:
• The frequency of inspections that are needed (based on the type of SCM proposed).
• The components of the SCM that need to be inspected.
• The types of problems that may be observed with each SCM component.
• The appropriate remedy for any problems that may occur.
Sample Inspection and Maintenance Agreement provisions are included at the end of each
SCM chapter. The most effective Inspection and Maintenance Agreements are site- specific for
the SCM components that are used on the site as well as any conditions that are unique to the
site (for example, the presence of steep slopes that should be inspected for soil stability).
A-7. SCM Operation & Maintenance 2 Revised: 2-11-2018

ntal
NCDEQ Stormwater Design Manual EnvirQualay
onmental
Table 1: Required Inspection Frequency for SCMs
Inspection Frequency SCM
Monthly and within 24 hours after every water Stormwater Wetlands
quality storm (greater than 1.5 inches in Wet Detention Basins
Coastal Counties and greater than 1.0 inch Bioretention Cells
elsewhere)
Level Spreaders
Infiltration Devices
Quarterly and within 24 hours after every water Sand Filters
quality storm (greater than 1.5 inches in Extended Dry Detention Basins
Coastal Counties and greater than 1.0 inch Permeable Pavement
elsewhere) Rooftop Runoff Management
Filter Strips
Grassed Swales *
Restored Riparian Buffers *
*Although these devices require quarterly inspection, mowing will usually be done at more frequent intervals
during the growing season.
To summarize Table 1, devices that include vegetation in a highly engineered system require
inspection monthly and after large storm events to catch any problems with flow conveyance or
vegetative health before they become serious. All other SCMs should be inspected at least
quarterly and after large storm events.
When required, signed and notarized Inspection and Maintenance Agreements should be
recorded with the appropriate Register of Deeds. The responsible party should keep a copy of
the Inspection and Maintenance Agreement along with a current set of SCM plans at a known
set location. It is also crucial that these documents be passed on when responsibility for
maintenance is transferred to a different party.
Inspection & Maintenance Record Keeping
All inspection and maintenance activities should be recorded. One easy way to do this is to
create an Inspection and Maintenance checklist based on the Inspection and Maintenance
Agreement. The checklist, at a minimum, should include the following:
• Date of inspection.
• Condition of each of the SCM elements.
• Any maintenance work that was performed (as well as who performed the work).
• Any issues noted for future maintenance (sediment accumulating, vegetation needing
pruning or replacement, etc.).
A-7. SCM Operation & Maintenance 3 Revised: 2-11-2018

NCDEQ Stormwater Design Manual Environmental
Each SCM should have its own maintenance record. Records should be kept in a log in a
known set location. Any deficient SCM elements noted in the inspection should be corrected,
repaired or replaced in a timely manner. Some deficiencies can affect the integrity of structures,
safety of the public, and the function of the SCM.
Major repairs or maintenance work should include the same level of inspection and
documentation as original installations. Inspection checklists and record logs should be kept in
a known set location.
Maintenance Responsibilities
As stated in the section above, maintenance is usually the responsibility of the owner, which in
most cases is a private individual, corporation, or home owner's association. Simple
maintenance items such as minor landscaping tasks, litter removal, and mowing can be done by
the owner, or can be incorporated in conventional grounds maintenance contracts for the overall
property.
Although a non-professional can undertake many maintenance tasks effectively, a professional
should be consulted periodically to ensure that all needs of the SCM facility are met. Some
elements that would benefit from professional judgment include structures, outlets,
embankments, and dams by a professional engineer, as well as plant system health by an
appropriate plant professional. Some developing problems may not be obvious to the untrained
eye.
In addition, it is advisable to have professionals do the more difficult or specialized work. Filling
eroded areas and soil-disturbing activities, such as re-sodding or replanting vegetation, are
tasks that are best assigned to a professional landscaping firm. If the work is not done properly
the first time, not only will the effort have been wasted, but also the facility may have been
damaged by excessive erosion. Grading and sediment removal are best left to professional
contractors. Appropriate professionals (e.g. SCM maintenance specialists, professional
engineers, aquatic plant specialists, etc.) should be hired for specialized tasks such as
inspections of vegetation and structures.
Providing for Maintenance Expenses
The expenses associated with maintaining a SCM are highly dependent on the SCM type and
design. However, the most important factor that determines the cost of SCM maintenance is the
condition of the drainage area upstream of the SCM. If a drainage area conveys a high load of
sediment and other pollutants to a SCM, the cost of maintaining the SCM will increase
dramatically. Preventing pollution in the drainage area as much as possible will reduce the cost
of SCM maintenance.
A funding mechanism should be created and maintained at a level that provides adequate
funding to pay for the maintenance expenses over the lifetime of the SCM. One option is to
A-7. SCM Operation & Maintenance 4 Revised: 2-11-2018

NC Environmental
NCDEQ Stormwater Design Manual Qaality
establish an escrow account, which can be spent solely for sediment removal, structural,
biological or vegetative replacement, major repair, or reconstruction of the SCMs. In the case of
a residential subdivision, the escrow account could be funded by a combination of an initial
payment by the developer and regular contributions by the homeowners' association. For an
example of how to legally structure such an account, please see the Phase II model stormwater
ordinance at the Stormwater Program web site. Routine maintenance costs may be relatively
easy to estimate, and include the expenses associated with the following activities:
• Conducting SCM inspections at the intervals shown in Table 1.
• Maintaining site safety, including any perimeter fences and other access inhibitors (trash
racks or pipe grates).
• Removing trash.
• Removing sediment that has accumulated in any components of the SCM.
• For infiltration-type systems, maintaining the filtering media and cleaning or replacing it
when necessary.
• Restoring soils to assure performance.
• Mowing turf grasses or maintaining other types of ground covers
• Controlling weeds and other invasive plants
• Pruning woody vegetation.
• Thinning desired vegetation
• Replacing dead vegetation.
• Stabilizing any eroding side slopes.
• Repairing damaged or eroded outlet devices and conveyance systems.
• Repairing embankments, dams, and channels due to erosion or rodents.
Emergency maintenance costs are more difficult to estimate. They depend on the frequency of
occurrence and the nature of the problem, which could vary from storm erosion repairs to
complete failure of a structure.
Emergency Maintenance
Maintenance after floods and other emergencies requires immediate mobilization. It can include
replanting and repairs to structures. Living systems are likely to need at least minor repairs after
emergencies. Following an emergency such as a flood, standing water may pose health risks
because of mosquitoes. Mosquito control should be considered if this becomes a problem.
For all installations, obstructions and debris deposited during storm events should be removed
immediately. Exceptions include debris that provides habitat and does not damage vegetation or
divert currents to, from, or in the SCM. In fact, because of the high quality habitat that can be
found in woody debris, careful re-positioning rather than complete removal may be desirable.
There may be instances where debris is even added. Such locations should be noted so that
this debris is not accidentally removed. Educating adjacent property owners about the habitat
benefits of debris and vegetation can decrease requests for removal.
A-7. SCM Operation & Maintenance 5 Revised: 2-11-2018

ntal
NCDEQ Stormwater Design Manual EnvirQuality
onmental
Debris & Litter Removal
Regularly removing debris and litter is well worth the effort and can be expected to help in the
following ways:
• Reduce the chance of clogging in outlet structures, trash racks, and other facility
components.
• Prevent damage to vegetated areas.
• Reduce mosquito breeding habitats.
• Maintain facility appearance.
• Reduce conditions for excessive surface algae.
• Reduce the likelihood of stagnant pool formation.
Special attention should be given to removing floating debris, which can clog outlet devices and
risers.
Sediment Removal & Disposal
Sediment gradually accumulates in many SCMs. For most SCMs, accumulated sediment must
eventually be removed. However, removal intervals vary so dramatically among facilities that no
"rules of thumb" are applicable. The specific setting of a SCM is important in determining how
often sediment must be removed. Important factors that determine rates of sedimentation
include the current and future land uses upstream and the presence of other sediment-trapping
SCMs upstream.
Before installing a SCM, designers should estimate the lifetime sediment accumulation that the
SCM will have to handle. Several time periods may be considered, representing expected
changes in land use in the watershed. To estimate sediment accumulation, first, an estimate of
the long term sediment load from upstream is needed, then an estimate of SCM sediment
removal efficiency (see Sections 3.0 and 4.0). The analysis of watershed sediment loss and
SCM efficiency can be expedited by using a sediment delivery computer model.
The frequency of sediment removal is then based on the sediment accumulation rate described
above versus the amount of sediment storage volume that is inherently provided in the SCM
without affecting treatment efficiency or stormwater storage volume. Again, the frequency of
sediment removal is SCM and site specific, and could be as frequent as every couple years, or
longer than 15-25 years. The volume of sediment needing to be removed and disposed of per
dredging cycle is the volume calculated above multiplied by any density or dewatering factors,
as appropriate.
Wet sediment is more difficult and expensive to remove than dry sediment. Ideally, the entire
facility can be drained and allowed to dry sufficiently so that heavy equipment can operate on
the bottom. Provisions for draining permanent pools should be incorporated in the design of
water impoundments where feasible. Also, low flow channels and outlets should be included in
all SCMs to bypass stormwater flow during maintenance. However, in many impoundments,
periodic rainfall keeps the sediment soft, preventing access by heavy equipment. In these
A-7. SCM Operation & Maintenance 6 Revised: 2-11-2018

NC Environmental
NCDEQ Stormwater Design Manual Qaality
cases, sediment may have to be removed from the shoreline by using backhoes, grade-ails, or
similar equipment.
Proper disposal of the sediment removed from a SCM must be considered. It is least expensive
if an onsite area or a nearby site has been set aside for the sediment. This area should be
located outside of the floodplain to prevent migration of the sediment if flooding occurs prior to
stabilization. If such a disposal area is not set aside, transportation and landfill tipping fees can
greatly increase the cost of maintaining the SCM, especially where disposal of wet sediment is
not allowed in the local landfill., Often, the material must be dewatered before disposal, which
again adds more cost and requires land area where wet material can be temporarily placed to
dry.
Sediment removal is usually the largest single cost of maintaining a SCM facility so the
necessary funds should be allocated in advance. Since sediment removal costs are so site
specific and dependent on disposal plans, it is difficult to provide good estimates. Actual
estimates should be obtained during the design phase of the SCM from sediment removal
contractors based on the planned situation. The estimates should include: mobilization
expenses, sediment removal expenses, material transport expenses (if applicable), and
disposal expenses (if applicable).
Stability & Erosion Control
The best way to promote soil stability and erosion control is to maintain a healthy ground cover
in and around SCMs. Areas of bare soil quickly erode, potentially clogging the facility with
sediment and threatening its integrity. Therefore, bare areas must be re- stabilized as quickly as
possible. Newly seeded areas should be protected with mulch and/or an erosion mat that is
securely staked. For SCM's that rely on filtration, such as bioretention facilities, it is critical that
adjacent soils do not contaminate the selected media during or after construction. If the site is
not permanently stabilized with vegetation when the filter media is installed, the best design
practice is to specify sod or other robust erosion control practices for all slopes in and
immediately around the SCM.
Erosion more often occurs in or around the inlet and outlet of SCM facilities and should be
repaired as soon as possible.
The roots of woody growth such as young trees and bushes in embankments are destabilizing
and may result in premature failure if unchecked. Consistent mowing of the embankment
controls stray seedlings that take root. Woody growth, such as trees and bushes, further away
from the embankment should not pose a threat to the stability of the embankment and can
provide important runoff filtering benefits. Trees and bushes may be planted outside
maintenance and access areas.
Animal burrows also diminish the structural integrity of an embankment. Muskrats, in particular,
burrow tunnels up to 6 inches in diameter. Efforts should be made to control animal burrowing.
Burrows should be filled as soon as possible.
A-7. SCM Operation & Maintenance 7 Revised: 2-11-2018

Environmental
NCDEQ Stormwater Design Manual Qaality
Maintenance of Mechanical Components
SCMs may incorporate mechanical components that need periodic attention. For example,
valves, sluice gates, fence gates, locks, and access hatches should be functional at all times.
The routine inspection, exercising, and preventive maintenance on such mechanical
components should be included on a routine inspection and maintenance checklist.
Vegetation Maintenance
Vegetation maintenance is an important component of any maintenance program. The grasses
and plants in all SCMs, but particularly in vegetative SCMs such as filter strips, grass swales,
restored riparian buffers, bioretention facilities, and stormwater wetlands, require regular
attention. The development of distressed vegetation, bare spots, and rills indicates that a SCM
is not functioning properly. Problems can have many sources, such as:
• Excessive sediment accumulation, which clogs the soil pores and produces anaerobic
conditions.
• Nutrient deficiencies or imbalances, including pH and potassium.
• Water-logged conditions caused by reduced soil drainage or high seasonal water table.
• Competition from invasive weeds.
• Animal grazing
The soil in vegetated areas should be tested every other year and adjustments made to sustain
vigorous plant growth with deep, well-developed root systems. Aeration of soils is
recommended for filter strips and grassed swales where sediment accumulation rates are high.
Ideally, vegetative covers should be mown infrequently, allowing them to develop thick stands of
tall grass and other plant vegetation. Also, trampling from pedestrian traffic should be
prevented.
Areas immediately up and downstream of some SCM plant installations are more likely to
experience increased erosion. Properly designed, located, and transitioned installations
experience may reduce accelerated erosion. All erosion should be repaired immediately to
prevent spreading.
Table 2 below describes some typical vegetation maintenance. It is important to note that
specific requirements related to some management practices, such as those performed within
buffers, must be followed. In addition, any vegetation that poses threats to human safety,
buildings, fences, and other important structures should be addressed. Finally, vegetation
maintenance activities typically change as the project ages.
A-7. SCM Operation & Maintenance 8 Revised: 2-11-2018

Environmental
NCDEQ Stormwater Design Manual Quality
Table 2: Vegetation Maintenance for SCMs
Maintenance Instructions
Activity
Replacement All dead plants should be removed and disposed of. Before vegetation that
of Dead has failed on a large scale is replaced, the cause of such failure should be
Plants investigated. If the cause can be determined, it should be eliminated before
any reinstallation.
The objective of fertilizing at a SCM is to secure optimum vegetative growth
rather than yield (often the objective with other activities such as farming).
Fertilization Infertile soils should be amended before installation and then fertilized
periodically thereafter. Fertilizer can be composed of minerals, organic
matter(manure), compost, green crops, or other materials.
Watering of the vegetation can often be required during the germination
and establishment of the vegetation, as well as occasionally to preserve the
Irrigation/ vegetation through drought conditions. This can typically be accomplished
Watering by pumping water retained in the SCM or from the stream, installing a
permanent irrigation system or frost-proof hose bib, or using portable water
trucks.
Mulching should be used to maintain soil temperature and moisture, as
Mulching well as site aesthetics. A half-inch layer is typically adequate. Ideally, mulch
should be removed before winter to prevent an infestation of rodents.
Weeding is often necessary in the first growing season, particularly if
herbaceous grasses are out-competing the young woody vegetation growth.
The need for weeding may be largely eliminated by minimizing the amount
Weeding of seed used for temporary erosion control. Weeding may also be required
if, over time, invasive or undesirable species are entering the site and out-
competing plants that are specifically involved in the treatment of the
stormwater.
Cultivating/ Hoeing is often required to loosen overly compacted soil and eliminate
Hoeing weeds that compete with the desirable vegetation.
Pruning Pruning is used to trim to shape and remove dead wood. It can force single-
shoot shrubs and trees to assume a bushier configuration.
A-7. SCM Operation & Maintenance 9 Revised: 2-11-2018

NCDEQ Stormwater Design Manual Environmental
Thinning dense vegetation may be necessary to thrive, to maintain open areas of
water as well as aesthetics, increase the vigor of individual specimens, to reduce
Thinning flow obstructions, and to increase the ability of maintenance staff to access the
entire SCM. Tall maturing trees, for the most part, have no place in a SCM (except
for buffers) and should be removed as soon as possible.
Saplings of tall trees planted in or near the SCM may require staking. Care
Staking should be taken not to damage the tree's roots with stakes. Stakes should be
kept in place for 6 to 18 months, and the condition of stakes and ties should
be checked periodically.
Wound The wounds on any trees found broken off or damaged should be dressed
Dressing following recommendations from a trained arborist.
Disease Based on monitoring observations, either insecticides or(preferably)organic means
Control of pest and fungal control should be used.
Fencing and signage should be installed to warn pedestrians and to prevent
damage due to trampling. These measures are often most necessary during early
Protection phases of installation but may be required at any time. Measures for controlling
from Animal human foot traffic include signs, fencing, floating log barriers, impenetrable bushes,
& Human ditches, paths, and piled brush.Wildlife damage is caused by the animals browsing,
Foot Traffic grazing, and rubbing the plants. The use of chemical wildlife repellents should be
avoided. Fences and meshes can be used to deter entry to the SCM. Tree tubes
can be used to prevent damage to individual specimens.
Mowing of perennial herbaceous grasses and wildflowers, especially once seed
heads have set, promotes redistribution of seed for this self-sustaining system.
Mowing Mowing should be carefully controlled, however, especially when performed for
aesthetics. As adjacent property owners and customers in general learn more about
SCMs, their vision of what is aesthetically pleasing can change. Grasses, in
healthy herbaceous stands, should never be mown more than once per year.
Maintenance of the Aquatic Environment
An important yet often overlooked aspect of SCMs that maintain a permanent pool is the need
to regularly monitor and manage conditions to promote a healthy aquatic environment. An
indicator of excess nutrients (a common problem) is excessive algae growth in the permanent
pool of water. Often, these problems can be addressed by encouraging the growth of more
desirable aquatic and semi-aquatic vegetation in and around the permanent pool. The plants
selected should be tolerant of varying water levels and have a high capacity to incorporate the
specific nutrients associated with the problem. Unchecked algae growth may result in aesthetic
and odor problems and algae-laden water can be washed downstream during rain contributing
to nuisance odors and stresses in downstream aquatic habitat.
A-7. SCM Operation & Maintenance 10 Revised: 2-11-2018

NCDEQ Stormwater Design Manual Environmental
Insect Control
Under the right conditions, ponded water can become a breeding ground for mosquitoes. Many
mosquito problems can be minimized through proper design and maintenance. The best control
technique for SCMs that maintain a permanent pool of water is to ensure that the design
discourages mosquito breeding habitat and encourages mosquito predators. Research at NC
State University has shown that Mosquitofish (Gambusia holbrooki) can be effective in the
control of mosquito populations in SCMs. This may include establishing combinations of deep
and shallow areas that encourage Mosquitofish as well as avoiding overhanging trees and other
vegetation that creates shade conducive to mosquito breeding and discourages dragonflies,
birds, bats, and other desirable predators. In larger basins, fish, which feed on mosquito larvae,
can be stocked. Additionally, splash aerators can be employed to prevent stagnant water,
however, this requires electricity at the site, increases maintenance costs and must be properly
designed so as to not decrease the settling efficiency of the SCM. Where feasible, SCMs may
incorporate a source of steady dry weather flow to reduce stagnant water.
Maintenance of Other Project Features
All other devices and features associated with the SCM should be monitored and maintained
appropriately. These additional items could affect the safety or aesthetics of the facility, which
can be as important if not more important than the operational efficiency of the facility. Such
items could include:
• Fences
• Access roads
• Trails
• Lighting
• Signage (e.g. no trespassing, emergency notification contact information, etc.)
• Nest boxes
• Platforms
• Watering system
A-7. SCM Operation & Maintenance 11 Revised: 2-11-2018

NC Environmental
NCDEQ Stormwater Design Manual QaartY
Maintenance
Bioretention maintenance requirements are typical landscape care procedures and include:
• Watering: Plants should be selected to be tolerant of the bioretention facility's particular
conditions. Watering may be required to initially establish the vegetation. Watering
should not be required after establishment (about 2 to 3 years). However, watering may
be required during prolonged dry periods after plants are established.
• Erosion Control: Inspect flow entrances, ponding area, and surface overflow areas
periodically. Replace soil, plant material, and/or mulch in areas where erosion has
occurred. Erosion problems should not occur with proper design except during extreme
weather events. If erosion problems do occur, the following issues should be re-
assessed: flow volumes from the contributing drainage area and bioretention size; flow
velocities and gradients within the bioretention facility; flow dissipation and erosion
protection methods in the pretreatment and in-flow areas. If sediment is deposited in the
bioretention facility, immediately determine the source, remove excess deposits, and
correct the problem.
• Plant Material: Depending on plants selected and aesthetic requirements, occasional
pruning and removal of dead plant material may be necessary. Be careful to prune trees
and shrubs to maintain lines of sight in parking lots and along roadways. NCDOT states:
"Shrubs must be kept low, and trees and large shrubs under-trimmed sufficiently to
permit clear sight in the area between 2 feet and 6 feet above roadway elevations.
Replace all dead plants. However, if specific plants consistently have a high mortality
rate, assess the cause and replace with appropriate species. Periodic weeding is
necessary until groundcover plants are established. Weeding should become less
frequent if an appropriate plant density has been established.
• Nutrients and Pesticides: The soil media and plant material should have been selected
for optimum fertility, plant establishment, and growth within the particular conditions of
each bioretention facility. Nutrient and pesticide inputs should NOT be required and will
degrade the pollutant processing capability of the bioretention facility, as well as
contribute to additional pollutant loading to receiving waters. By design, bioretention
facilities are typically specified in watersheds where phosphorous and nitrogen levels are
often elevated. Therefore, these should not be limiting nutrients with regard to plant
health. If in question, have the soil analyzed for fertility. Addition of commercial fertilizer
or compost to bioretention will likely result in nutrient export from the bed.
• Mulch: Replace mulch annually in bioretention facilities where heavy metal deposition
is likely (e.g., drainage areas that include commercial/industrial uses, parking lots, or
roads). Metal 'hot spots' occur where water enters the bed. In residential or other
settings where metal deposition is not a concern, replace or add mulch as needed to
maintain a 2 to 4-inch depth.
• Filtering Capacity: When the filtering capacity diminishes substantially (e.g., when
water ponds on the surface for more than 12 hours), remedial actions must be taken. If
the water still ponds for more than 12 hours, the top few inches of material should be
removed and replaced with fresh material. The removed sediments should be disposed
of in an acceptable manner (e.g., landfill) or land application. If that does not solve the
C-2. Bioretention Cell 17 Revised: 1-19-2018

NIC
Environmental
NCDEQ Stormwater Design Manual Quality
problem, more extensive rebuilding is required. If the bed has filter fabric installed under
the media and above the washed rock, the filter fabric may be clogged with sediment. If
clogged filter fabric is present, the bed will need to be rebuilt.
Figure 5: Soil Probe Showing a Profile of Bioretention Cell Media
-��t Y ... ,_r ,.•.
'N\lik: --'- • -':,,,X,' • -2.'. { It' or. s,J
_ �A
_ ,
C\� i / s� . t
4
'
p "Y ,
\ .. '
a
, w
S^ 3 t
Figure 6: Examples of When to Perform Maintenance
�, Al'. :~Z j 4
�K \ `. (1�t. �f[ � .j,l. t. ... w t'.r,k', Ott.
.. '1 , .,..:.&'fry tr i}+ Al'r i '�i .f , '''t .G,3 ;I 1 i.
lr
:pik 4:. .4.3,.tAie.',IA4 .. - . "` P.-1-Vil:1.-2-----...r.:-' _le...s.--',.-. •:• . :, 4''d 1 r. ..,
t s%-,a 7-4,,.. ;\4 4,i'•;I, , 44 14' _^`., a ^` j,,..c '1.
kt
Replace gravel when it has become Replace mulch when it becomes thin
clogged with sediment or is taken over by grass. Manually or
mechanically remove grass — do not spray
herbicide!
C-2. Bioretention Cell 18 Revised: 1-19-2018

Environmental
NCDEQ Stormwater Design Manual QaartY
Sample Operation and Maintenance Provisions
Important operation and maintenance procedures:
• Immediately after the bioretention cell is established, the plants will be watered twice
weekly if needed until the plants become established (commonly six weeks).
• Snow, mulch or any other material will NEVER be piled on the surface of the bioretention
cell.
• Heavy equipment will NEVER be driven over the bioretention cell.
• Special care will be taken to prevent sediment from entering the bioretention cell.
• Once a year, a soil test of the soil media will be conducted.
• After the bioretention cell is established, Inspect it once a quarter. Records of operation
and maintenance will be kept in a known set location and will be available upon request.
• Inspection activities shall be performed as follows. Any problems that are found shall be
repaired immediately.
• Remove top layer of fill media when the pool does not drain quickly. Based on the media
specification, the pool should drain within 24 hours.
Table 6: Sample Operation and Maintenance Provisions for Bioretention Cells
SCM element: Potential problems: How to remediate the
problem:
The entire bioretention cell Trash/debris is present. Remove the trash/debris.
Regrade the soil if necessary to
The perimeter of the Areas of bare soil and/or remove the gully, and then plant a
bioretention cell erosive gullies have formed. ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
The inlet Blocking/Clogging? Unclog the pipe. Dispose of the
sediment off-site.
The pipe is cracked or Replace or repair the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the Regrade the swale if necessary
swale (if applicable). and provide erosion control
devices such as reinforced turf
matting or riprap to avoid future
problems with erosion.
C-2. Bioretention Cell 19 Revised: 1-19-2018

NC Environmental
NCDEQ Stormwater Design Manual Quality
Stone verge is clogged or Remove sediment and clogged
covered in sediment(if stone and replace with clean
applicable). stone.
Flow is bypassing pretreatment Regrade if necessary to route all
area and/or gullies have flow to the pretreatment area.
formed. Restabilize the area after grading.
Sediment has accumulated to a Search for the source of the
depth greater than three inches. sediment and remedy the problem
if possible. Remove the sediment
and restabilize the pretreatment
The pretreatment system area.
Erosion has occurred. Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present. Remove the weeds, preferably by
hand.
Best professional practices Prune according to best
show that pruning is needed to professional practices
maintain optimal plant health. Maintain lines of sight between 2'-
6'.
Determine the source of the
problem: soils, hydrology,
Plants are dead, diseased or disease, etc. Remedy the problem
Plant material dying.
and replace plants. Provide a one-
Plant time fertilizer or lime application to
establish the ground cover if a soil
test indicates it is necessary.
Remove the weeds, preferably by
Weeds are present. hand. If an herbicide is used, wipe
it on the plants rather than
spraying.
Best professional practices Prune according to best
show that pruning is needed to professional practices. Maintain
maintain optimal plant health. lines of sight
Bioretention cell vegetation Plants are dead, diseased or Determine the source of the
dying. problem: soils, hydrology,
disease, etc. Remedy the problem
and replace plants. Provide a one-
time fertilizer application to
C-2. Bioretention Cell 20 Revised: 1-19-2018

Environmental
NCDEQ Stormwater Design Manual Quality
establish the ground cover if a soil
test indicates it is necessary. If sod
was used, check to see that it was
not grown on clay or impermeable
soils. Replace sod if necessary.
Tree stakes/wires are present Remove tree stake/wires (which
six months after planting. can kill the tree if not removed).
Mulch is breaking down or has Spot mulch if there are only
floated away. random void areas. Replace
whole mulch layer if necessary.
Remove the remaining much and
replace with triple shredded hard
wood mulch at a maximum depth
of four inches.
Soils and/or mulch are clogged Determine the extent of the
with sediment. clogging - remove and replace
either just the top layers or the
Bioretention cell mulch and entire media as needed. Dispose
media of the spoil in an appropriate off-
site location. Use triple shredded
hard wood mulch at a maximum
depth of four inches. Search for
the source of the sediment and
remedy the problem if possible.
An annual soil test shows that Dolomitic lime shall be applied as
pH has dropped or heavy recommended per the soil test and
metals have accumulated in the toxic soils shall be removed,
soil media. disposed of properly and replaced
with new planting media.
Clogging has occurred. Wash out the underdrain system.
The underdrain, filter fabric Clogging has occurred. Clean out the drop inlet. Dispose
element, and outlet system of the sediment off-site.
The drop inlet is damaged Repair or replace the drop inlet.
The receiving water Erosion or other signs of Contact the NC Division of Water
damage have occurred at the Resources.
outlet.
C-2. Bioretention Cell 21 Revised: 1-19-2018

APPENDIX D
OPERATION AND MAINTENANCE MANUAL

APPENDIX E
SUPPLEMENTAL EZ STORM

SUPPLEMENT-EZ COVER PAGE
PROJECT INFORMATION
1 Project Name Asheville Regional Airport-ATCT and TRACON Project
2 Project Area(ac) 16.14
3 Coastal Wetland Area(ac) 0
4 Surface Water Area(ac) 0
5 Is this project High or Low Density? High
6 Does this project use an off-site SCM? No
COMPLIANCE WITH 02H.1003(4)
7 Width of vegetated setbacks provided(feet) N/A
8 Will the vegetated setback remain vegetated? N/A
9 If BUA is proposed in the setback,does it meet NCAC 02H.1003(4)(c-d)? N/A
10 Is streambank stabilization proposed on this project? No
NUMBER AND TYPE OF SCMs:
11 Infiltration System
12 Bioretention Cell 1
13 Wet Pond
14 Stormwater Wetland
15 Permeable Pavement
16 Sand Filter
17 Rainwater Harvesting(RWH)
18 Green Roof
19 Level Spreader-Filter Strip(LS-FS)
20 Disconnected Impervious Surface(DIS)
21 Treatment Swale
22 Dry Pond
23 StormFilter
24 Silva Cell
25 Bayfilter
26 Filterra
FORMS LOADED
DESIGNER CERTIFICATION
27 Name and Title: Dave Skurky,P.E.,Chief Stormwater Engineer
28 Organization: Aulick Engineering,LLC
29 Street address: 600 Park Offices Dr.,Suite 300
30 City,State,Zip: Durham,NC,27709
31 Phone number(s): 919-819-4242
32 Email: [e-mail]
Certification Statement:
I certify,under penalty of law that this Supplement-EZ form and all supporting information were prepared under my direction or supervision;that the
information provided in the form is,to the best of my knowledge and belief,true,accurate,and complete;and that the engineering plans,
specifications,operation and maintenance agreements and other supporting information are consistent with the information provided here.
Designer
Signature of Designer
Seal Date

DRAINAGE AREAS
1 Is this a high density project? Yes
2 If so,number of drainage areas/SCMs 1
3 Does this project have low density areas? No
4 If so,number of low density drainage areas 0
Is all/part of this project subject to previous rule
5 versions? No
FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site 1
4 Type of SCM Bioretention Bioretention
5 Total drainage area(sq ft) 703065 166250
6 Onsite drainage area(sq ft) 703065 166250 _
7 Offsite drainage area(sq ft) 0 0
8 Total BUA in project(sq ft) 126803 sf 58723 sf
New BUA on subdivided lots(subject to permitting)
9 (sq ft) sf sf
New BUA not on subdivided lots(subject to
10 permitting)(sf) 77764 sf 58234 sf
11 Offsite BUA(sq ft) sf sf
12 Breakdown of new BUA not on subdivided lots:
-Parking(sq ft) 14373 sf 14373 sf
-Sidewalk(sq ft) 5452 sf 5452 sf
-Roof(sq ft) 16847 sf 16847 sf
-Roadway(sq ft) 41091 sf 21561 sf
-Future(sq ft)
-Other,please specify in the comment box
below(sq ft)
New infiltrating permeable pavement on
13 subdivided lots(sq ft)
New infiltrating permeable pavement not on
14 subdivided lots(sq ft)
Existing BUA that will remain(not subject to
15 permitting)(sq ft) 49039 sf 489 sf
16 Existing BUA that is already permitted(sq ft) sf sf
17 Existing BUA that will be removed(sq ft) 22277 sf 11018 sf
18 Percent BUA 11% 35%
19 Design storm(inches) 1.0 in
20 Design volume of SCM(cu ft) 4772 cf
21 Calculation method for design volume Simple Method
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):
This project is within Airport property,which contains 900ac.The entire site
column includes limits of construction, 16.14ac,which was used to determine
BUA values.The drainage area'1'includes area going to the bioretention
within the limits of construction,which is 3.82ac.The new roadway BUA
includes proposed paved&aravel roads.

BIORETENTION CELL
1 Drainage area number 1
2 Minimum required treatment volume(cu ft) 4772 cf
GENERAL MDC FROM 02H.1050
3 Is the SCM sized to treat the SW from all surfaces at build-out? Yes
4 Is the SCM located away from contaminated soils? Yes
5 What are the side slopes of the SCM(H:V)? 5:1
6 Does the SCM have retaining walls,gabion walls or other engineered
side slopes? No
Are the inlets,outlets,and receiving stream protected from erosion 7
(10-year storm)? Yes
8 Is there an overflow or bypass for inflow volume in excess of the
design volume? Yes
9 What is the method for dewatering the SCM for maintenance? Drawdown Orifice
10 If applicable,will the SCM be cleaned out after construction? Yes
11 Does the maintenance access comply with General MDC(8)? Yes
12 Does the drainage easement comply with General MDC(9)? Yes
13 If the SCM is on a single family lot,does(will?)the plat comply with
General MDC(10)? N/A
14 Is there an O&M Agreement that complies with General MDC(11)? Yes
15 Is there an O&M Plan that complies with General MDC(12)? Yes
16 Does the SCM follow the device specific MDC? Yes
17 Was the SCM designed by an NC licensed professional? Yes
BIORETENTION CELL MDC FROM 02H.1052 18 SHWT elevation(fmsl) 2108.00
19 Bottom of the bioretention cell(fmsl) 2119.00
20 Ponding depth of the design storm(inches) 1 in
21 Surface area of the bioretention cell(square feet) 5899 sf
22 Design volume of SCM(cu ft) 7251 cf
23 Is the bioretention cell used for peak attenuation? Yes
24 Depth of peak attenuation over planting surface(in) 24 in
25 Height of peak attenuation outlet above the planting surface(in) 30 in
26 Infiltration rate of the in situ soil(inch/hour) N/A
27 Diameter of the underdrain pipes(if applicable) 4 in
28 Does the design include Internal Water Storage(IWS)? Yes
29 if so,elevation of the top of the IWS(fmsl) 2120
30 Elevation of the planting surface(fmsl) 2121.5
31 What type of vegetation will be planted? (grass,trees/shrubs,
other)? Grass
32 Media depth(inches) 30 in
33 Percentage of medium to coarse washed sand by volume 75-85%
34 Percentage of fines(silt and clay)by volume 8-15%
35 Percentage of organic matter by volume 5-10%
36 Type of organic material Pine Bark Fines
37 Phosphorus Index(P-Index)of media(unitless) <30
38 Will compaction be avoided during construction? Yes
39 Will cell be maintained to a one inch/hour standard? Yes
40 Depth of mulch,if applicable(inches) Sod
41 Type of mulch,if applicable Sod
42 How many clean out pipes are being installed? 1
43 Type of pretreatment that will be used: Forebay
ADDITIONAL INFORMATION
44 Please use this space to provide any additional information about the
bioretention cell(s):
(9)The method of dewatering the bioretention area is the outlet control
structure.
Bioretention 3 11:51 AM 5/22/2024

APPENDIX F
BUA EXHIBIT

e 1 r 1
IMPERVIOUS SURFACE AREA CALCULATIONS IMPERVIOUS SURFACE AREA WITHIN BIORETENTION CALCULATIONS
NOTE 1: THIS PROJECT IS WITHIN ASHEVILLE REGIONAL AIRPORT /
PARKING(SF):14,373 PARKING(SF):14,373 PROPERTY, WHICH HAS A PROPERTY AREA OF 900AC. FOR THE
SIDEWALK(SF):5,452 SIDEWALK(SF):5,452 PURPOSES OF OUR CALCULATIONS,THE LIMITS OF OUR CONSTRUCTION
ROOF(SF):16,847 -ROOF(SF):16,847 (16.14 AC)WERE USED WHEN DETERMINING BUILT UPON AREA VALUES. > �,
ROADWAY(PAVED AND GRAVEL,SF):41,091 _ROADWAY(PAVED AND GRAVEL,SF):21,561 W' she V i I le
EXISTING BUA TO REMAIN(SF):49,039 EXISTING BUA TO REMAIN(SF):489 /
EXISTING BUA TO BE REMOVED(SF):22,277 EXISTING BUA TO BE REMOVED(SF):11,018 I REGIONAL AIRPORT
300'
TOTAL IMPERVIOUS AREA(SF):126,803 TOTAL IMPERVIOUS AREA(SF):58,723 - - 0' 50' 100' 200` Mr
TOTAL IMPERVIOUS AREA(AC):2.91 TOTAL IMPERVIOUS AREA(AC):1.35 �I RSA00' RSA-
TOTAL PROJECT AREA(AC):16.14(SEE NOTE 1) TOTAL BIORETENTION DRAINAGE AREA WITHIN LIMITS OF CONSTRUCTION(AC):3.82 -RSA RSA RSA RSA RSA RSA
A- \ AVCON,INC.
PROJECT PERCENT OF IMPERVIOUS AREA: PROJECT PERCENT OF IMPERVIOUS AREA: TOFA TOFA 6Nc1N66RS@PLANNERS
(TOTAL IMPERVIOUS AREA/TOTAL PROJECT AREA)X 100 (TOTAL IMPERVIOUS AREA/TOTAL BIORETENTION DRAINAGE AREA WITHIN LIMITS OF CONSTRUCTION)X 100 TOFA TOFA \ 0u5 NEERSAVENUN SUITE
NERS
2.91 AC / 16.14 AC X 100 1.35 AC / 3.82 AC X 100 TSA TSA N. TE 140 HUNTERSVILLE,NC 28075
OFTICE:(704)v54-Ewa
=18,0% =35.3% 1 EsInv." "m
- - SH - 1 Nn /
AY,7as - GRAVEL ROAD:11,346 SF ROFA Rorn noro. R� RELEASED FOR
EXISTING ROAD TO REMAIN:927 SF ROFA Horn CONSTRUCTION
R �- .e.+.� OFA-
. 1. 1 ,TOTAL ROAD:26,162 SF TSA TSA TSA TSA
TOTAL GRAVEL ROAD:3,583 SF - TSA TSA - - TOFA
TSA - TOFA TOFA - - -- - TOFA TOFA oV',C.ARO7j�6�',
TO'A TOFA s4'..'0F O'..4P'`
EXISTING ROAD TO REMAIN:5262 SF EXISTING BUA TO BE REMOVED:22,277 SF
- SEAL =
040195 I _
SIDEWALK:5,452 SF ❑ \ .,.�cINE�:, ;`
w II LIMITS OF DISTURBANCE:16.1 AC ��`9V/0"""'K
N42°29'08.0o"W 13
- �� J kr"I of Hilo mo
1050.840
58 221 N18103�06.46"W o N
JJJJ�JJJ JJ�JJ�J , r!J \
JJ N
` - _..- .. - • �JJ�JJ�J�JJ"JJJJ�JJ�J'�JJ JJJJJJJLJ'A
�", 0. �. 430 S72°02'59.51"W 922.264 \ ASHEVILLE
riles = S87°3324.36E �85.200 \ REGIONAL AIRPORT
_ I■ 15.56E
'y`
Ix 1
00000® PROPOSED S48°48'25.36"E
BIORETENTION \ FLETCHIR
N8°46'27.83"E \ o 39.945
52.6E3 ER
NORTH CAROLINA
N45°32 23 67"E
EXISTING ROAD TO REMAIN:36,633 SF \
P -
52 356
239.812- __
N S78°08 18.90"E _s� �.� �,
N l_ - �.__�J-"_,� -. �w��'a-af- .- -.^,.• -.�rs.iur r� JJ \ \ \ LImIf�IIMI,.R11f,0e� �rs'n}.r�-..�
S40°49'19.96 W J J\ \� -N47°45'45.07"E
1.0 , 41.536Ilk N C_ 668.04E ri° _ � T -0•
EXISTING ROAD TO REMAIN \ EXISTING ROAD TO �� s A a_ _-
3 WITHIN BIORETENTION ROOF:16,847 SF REMAIN:258SF S47°28'57.24"E \ \ \\J -,\'q 6, / \\
mDRAINAGE AREA:489 SF 27.720 \ �J �� 6°0 ss / / \\ KEY PLAN
t1 '3s NIT,
GRAVEL ROAD WITHIN BIORETENTION \ PARKING:14,373 SF saa°5T 399 5 8 \ \ J=\\ \ E / ------
X \\ EXISTING ROAD TO
a DRAINAGE AREA:521 SF �.--, /
D=D N50°46'20.36"E �\ \ \ \ A0 2/ S47°12'48.03"W�,
SAo/�n3 212.617 \\ REMAIN:3,405 SF
s2sa7 �\ \ \ / 0 V �j ATCT AND TRACON
4I EXISTING BUA WITHIN BIORETENTION \' � JJJ
a BIORETENTION �� a� N / / \ -
o DRAINAGE AREA TO BE REMOVED:11018 SF DRAINAGE AREA:6.5 AC \
;: N / N40°29'00.07"W /\
w I .r \ s -?� / NO2°32'18.59"W 562.779 / /
"i, \ N /
ROAD WITHIN BIORETENTION S37°41'43.83"W I\ gs � ao.o37s 2s71'W // /
w DRAINAGE AREA:21,040 SF 408.738 a\�, \\\ s oo20'35.58"E 22 309 / % / BUILT-UPON-AREA
v �,
N - - - _ JJJ JJJ
vr, �J\ N23°15'31.70"W // / /® JJJJJ J
3 \ 26739 / /
.•.,
I ��_ A JA N3a°zelz.erw / / � �> >° EXHIBIT
p JJ
w � ,-� � �\ \J� 68.008 /��g j S02°48'29 02"W r
N52°0T 13 38"W \\ / 1"�1 33 / / 33.09
'\ 5 63.791- -� / SA y30� /S21°40'20 79"W ` J
Q \ ! \ �w\�J JJ\ / / / /'q / _ 46.490 ATTENTION:
JJ •.\ / / / -,-,------
/'_ S46°07'16.11"W THIS DOCUMENT CONTAINS PRIVILEGED AND PROPRIETARY
JJ JJJ' / _ / 4().704 INFORMATION,ALL OF WHICH IS EXPRESSLY PROVIDED BY AVCON,INC.,
ou S36°52'33.78"W , - / FOR USE BY THE INTENDED RECIPIENT,AND FORA SPECIFIC PURPOSE.
21.195 , ,. J_rJ -.? c -,� � \ S44°ST Oa.O6"E WITHOUT THE EXPRESS WRITTEN CONSENT OF AVCON,INC.ANY
S51°49'36.41"E \ 46.964 DISTRIBUTION,REPRODUCTION,OR OTHER USE OF THIS DOCUMENT,IN
J \ •� 3�'{3 Yn WHOLE OR IN PART,S STRICTLY PROHIBITED
al 63.571 -.4e saw
S35°33'03.74"W
SCALE: 1"=1oo' AS NOTED
0 E. 35.756 s.. / REVISIONS:
ar
S57°18'11.41"W \V B�1 --. S18°42'11.52"W NO. DATE BY DESCRIPTION
a EXISTING ROAD TO 38.679 - 62.518
o I REMAIN:2554 SF 4°08'31.26"W -
? I 77.055 i S5a°38'32.53"E
U27.016
w
3 / \ \\
a i
\
z
0 DESIGNED BY: D.A.S
a
o DRAWN BY: H.C.A.
z z CHECKED BY: D.A.S.
d
w \ APPROVED BY: D.A.S.
z_
z DATE: MAY 2024
z
w
7, STATE LICENSE# N.C.C-2450
D
PROJECT NO. 2022.0157.02B
U m
SHEET NUMBER
ii v1/40
n I SW-05

APPENDIX G
ENVIRONMENTAL ASSESSMENT - WETLAND SECTION

>-
-s ev Runway Reconstruction and New Parallel Taxiway Environmental Assessment
REGIONALiiie
AIRPORT
1,kioritkr.41.4,.., i • . -- - 7 g•ficlii t,7,_1 ., , . ./ -
AV . 41,,,,let. 4 N..)int . '
61ri ♦q
{ Broad Rwer .,� ''•... '�" 4.
c ,.\ 0 .
It 111": 4„. *
... '. a.,,z<, .. It- \ 14,
• 'ti,=mod �—:..� ` r A i ' `i, ;,- -' — _
�' {{ .t _ ..
4;i, -A- .
, 0 . lit; , —an
n il, t '
`u 1
. . . , If toi%),.'is,''„I 44 : .7: .., r_ .,,....: ,s
1, / �. mil.',`� } !'r.. • .,
/ •
,fir_ r,, i1' t e x '.
I I Aa . g —4 A -�t. 4.1! .
_ :;j c4oFannin QQtal - r O , • i
,.i.t_r
LEGEND {{{{ , .
Z Stream Label i .• - - 1. A- Stream
.•• , r III .
Delineated Stream rIr' >'r `. t
Delineated Wetland
Delineated Open Water �\
NCDENR Natural Area •
S<orN`gr.- r . ,�. '
\ � J
Previously Permitted 6°yr s ,,,k,
_ .
Area Not Delineated
NWI Wetland . ,:-_ r-- -_-:\;,- ,, "v/CreeK"
FEMA 100-year Floodplain * 1
l;�u�{4. s ,:, Y
N ,.
Property Boundary teed ``�
0 1,000 2,000 W E t` r .., �eG
--Feet S /4~ G .s'r -.8. ,� y
•
Figure 3-6: Wetlands, Streams, and Floodplains
Chapter Three:Affected Environment 3-22

's h ev/l i e Runway Reconstruction and New Parallel Taxiway Environmental Assessment
FtEctc1N. A. I_, A I. FtPO RT
3.8.3 Wetlands and Other Jurisdictional Waters of the United States
Executive Order 11990,Protection of Wetlands,mandates that each federal agency take action to minimize the
destruction, loss, or degradation of wetlands and to preserve and enhance the natural values. To comply with
this Order, as well as the Clean Water Act (CWA), wetlands were identified and delineated within the study
area. Wetlands as currently defined by the USACE, (33 CFR §328.3[b]) and the USEPA(40 CFR §230.3[t]),
are:
Those areas that are inundated or saturated by surface or groundwater at a frequency and duration
sufficient to support, and that under normal circumstances do support, a prevalence of vegetation
typically adapted for life in saturated soil conditions. Wetlands typically include swamps, marshes,
bogs, and similar areas.47
3.8.3.1 Identification and Classification
On-site wetland delineations were performed for the majority of Airport property in November and
December of 2009 as well as in April,November,and December of 2010. Wetlands were identified on the
basis of soils,hydrology,and vegetation as set forth by the 1987 Corps of Engineers Wetlands Delineation
Manual.48 The jurisdictional areas identified on Airport property are depicted on Figure 3-6 (refer to page
3-22), and this stream and wetland map encompassing the majority of the Airport property was submitted
to the USACE along with supporting documentation requesting a jurisdictional wetland determination.
The USACE issued the determination on February 9, 2011 (refer to Appendix B).
3.8.3.2 Wetlands
Wetlands identified on site include areas with the presence of three wetland criteria as outlined in the
Corps of Engineers Wetlands Delineation Manual(87 Manual): presence of hydric soil and hydrophytic
vegetation; and evidence of wetland hydrology and connectivity. Indicators of hydrology include,but are
not limited to, saturation in the upper 12 inches of the soil profile, drift lines, water marks, and sediment
deposits. In general, hydric soils have a chroma 1 or less, with or without oxidized root channels; or
chroma 2 or less with oxidized root channels in the upper 12 inches of the"A"horizon. Vegetation holding
"FAC", "FAC+", "FACW", or"OBL" designations are considered to be hydrophytic. Plant communities
in subject areas include hydrophytic vegetation at a proportion of at least 50 percent.
Forested, shrub scrub (dominated by woody vegetation less than 20 feet in height), and herbaceous
wetlands exist within the Asheville Regional Airport property boundary. Common species identified in
on-site wetland habitats include: red maple, tag alder (Alnus serrulata), sedges (Carex spp.), ironwood
(Carpinus caroliniana), smooth rush (Juncus effuses), Joe-pye weed (Eupatorium spp), jewelweed
(Impatiens capensis), smartweed (Polygonum spp.), black willow (Salix nigra), elderberry (Sambucus
canadensis), and woolgrass (Scirpus cyperinus). In general, the wetlands are in fair condition.
4'USACE,1987 Corps of Engineers Wetlands Delineation Manual,Technical Report Y-87-1, 1987,p. 169.
48 Ibid.,p.14.
71101.
Chapter Three:Affected Environment 3-23

's h ev/l i e Runway Reconstruction and New Parallel Taxiway Environmental Assessment
FtEctc1N. A. I_, A I. FtPO RT
Approximately 5.2 acres of wetlands were delineated on Airport property. This acreage is in addition to
the two NWI wetland areas(totaling 13.8 acres)that were identified on the southwestern portion of Airport
property that was not delineated (refer to Figure 3-6, page 3-22). Of the total 5.2 acres of delineated
wetlands on the Airport property, approximately 0.9 acre of shrub scrub wetlands were identified within
the proposed construction footprint.
3.8.3.3 Jurisdictional Streams
Channel determinations are based primarily on the definition of"waters of the US" found in 33 Code of
Federal Regulations, Section 328. The jurisdictional extent is considered the upper limits of the ordinary
high water mark (OHWM) as identified in the field. The USACE District Office has provided additional
regional guidance for jurisdictional designations on drainage features. Only those channels with adequate
groundwater discharge to maintain intermittent or perennial flow are found to be jurisdictional.
Drainage features that exhibited an OHWM during the field investigations are considered to be jurisdictional
waters of the United States,and are included on Figure 3-6(refer to page 3-22). Streams within or adjacent
to the Airport property boundary include the French Broad River and unnamed intermittent and perennial
tributaries.
There are approximately 16,766 linear feet of streams on the Airport property,all of which originate in close
proximity to the toe-of-slope of existing Airport development, and are moderately to severely affected by
sediments. Four streams were identified in the vicinity of the Proposed Action and are described in the
following sections (refer to Figure 3-6,page 3-22).
3.8.3.3.A Stream A
Stream A is a perennial stream located roughly parallel to the north end of Runway 16-34, on the
west side of the Airport. There are no riffle/pool complexes in the stream, the slope is very flat, and
the substrate is fine. Sediment accumulations are from a few inches to over a foot due to stormwater
discharges. The stream is adjacent to a maintained field and grassed utility road;therefore,there is little
or no wooded riparian buffer. Aquatic species were not observed within the channel. Approximately
573 linear feet of Stream A were identified within the Airport property boundary.
3.8.3.3.B Stream B
Stream B is located near Old Fanning Bridge Road, southwest of Runway 16-34. The stream is
approximately 429 feet in length,is situated adjacent to a road bed,and is highly incised(approximately
10 to 12 feet). This stream is somewhat overgrown by exotic invasive plant species and some
household trash was observed in the vicinity. Well developed riffle/pool complexes are not present in
this section.Aquatic species were not observed within this channel.
3.8.3.3.0 Stream C
Stream C is located perpendicular to the south end of the Runway 16-34,on the west side of the Airport.
The upper end of this stream channel is approximately 566 linear feet in length,intermittent,and highly
influenced by stormwater flows. A stormwater toe-drain at the base of the existing airport fill pad is
upslope of this stream. This upstream segment is one to three feet wide and has a broad woody buffer.
Chapter Three:Affected Environment 3-24

's h ev/l i e Runway Reconstruction and New Parallel Taxiway Environmental Assessment
FtEctc1N. A. I_, A I. FtPO RT
Bed and banks of this upper section are not well defined and there was a small amount of vegetation
growing in the channel bed. Substrate in the channel is fine and homogenous and provides little in the
way of quality habitat for aquatic organisms. Well developed riffle/pool complexes are not present in
this section. Aquatic species were not observed within this channel. Flow in this stream channel goes
subsurface at a grassed utility road. On the other side of the utility road, water flow comes out of the
side of a headcut that is about six feet high. From this point to the culvert downstream, the stream is
classified as perennial. This stream segment is approximately 708 linear feet in length. It is highly
incised(approximately five to eight feet)and probably does not have access to the floodplain except in
extreme rain events. This stream segment is approximately five to six feet wide and flows between an
open field and an agricultural field and has little to no wooded riparian buffer. Bank erosion is present
in this section and large amounts of sediments are also in this channel. Some riffles and shallow pools
are present in this segment of the channel; however, they are not well developed or prominent.
3.8.3.3.D Stream D
Stream D is located perpendicular to the south end of the existing runway on the west side of the
Airport. Stream D is a perennial stream segment approximately 376 linear feet long. This stream
segment is highly influenced by stormwater flows. A stormwater toe-drain at the base of the existing
airport fill pad is located upslope of this stream. The stream channel is approximately two to four feet
in width and is incised throughout its length. There is evidence of stream bank erosion throughout
its length and sediment depth in the channel ranges from two to four inches. Substrate in the channel
is fine and homogenous and provides little in the way of quality habitat for aquatic organisms. Well
developed riffle/pool complexes are not present in this channel. Aquatic species were not observed
within this channel. This stream channel exhibits a wide wooded riparian buffer with mature trees.
3.8.4 Federal and State Protected Species
3.8.4.1 Federal
Pursuant to Section 7 of the Endangered Species Act of 1973, as amended,Airport property was evaluated
for the presence of federally protected species or their suitable habitats. A list of federally protected
species known to occur or potentially occur in Buncombe and Henderson Counties, dated August 2010,
was acquired from the United States Fish and Wildlife Service (USFWS) and is provided in Table 3.8
(refer to page 3-26).
A literature search was performed to obtain descriptions of the federally protected species and their
habitat requirements. In addition, the NCDENR Natural Heritage Program (NHP) species database was
last accessed on December 3, 2010, to verify whether there were any known occurrences of federally
protected species within a five-mile radius of the Airport. Based on habitat information and occurrence
data fromNCDENR-NHP,no federally threatened or endangered species were known to occur on Airport
property. Further, there is no designated critical habitat on the Airport, according to the NCDENR-NHP.
Field surveys of the Airport property were conducted in November and December of 2009 as well as in
April,November, and December of 2010. The information gathered from the USFWS and NCDENR was
compared to the habitat types and results from the field surveys on Airport property that were described in
Chapter Three:Affected Environment 3-25