SWA000150_Stormwater Report_20220624

HYDROLOGY AND EROSION CONTROL STUDY
FOR
Rutherfordton Retail Store
TBD US HWY 64
Rutherfordton, NC 28139
PIN 1636703
OWNER
The Broadway Group, LLC
P.O. Box 18968
Huntsville, AL 35804
Contact: Robert M Broadway
[phone]
ENGINEER
Jesse Gardner, PE
March 02, 2022
Rev:
C'4D0"C
Civil
Design
Concepts, PA
168 Patton Avenue, Asheville, NC 28801
828-252-5388

TABLE OF CONTENTS
ITEM/DESCRIPTION
PAGE NO.
1.0 Proj ect Narrative...........................................................................................
1
2.0 Executive Summary.....................................................................................
2
3.0 Erosion Control............................................................................................
2
4.0 Stormwater Quantity Analysis.....................................................................
2
4.1 Detention Methodology....................................................................
2
4.2 Allowable Hydrology.......................................................................
2
5.0 Stormwater Quality Analysis.......................................................................
3
5.1 Water Quality Volume.....................................................................
3
5.2 Water Quality Drawdown................................................................
3
APPENDICES
Appendix A
GIS Map
Appendix B
FEMA Firm Map
Appendix C
USDA NRCS Soils Report
Appendix D
Skimmer Basin Design Calculations
Appendix E
Channel Protection
Appendix F
Existing and Proposed Drainage Area Maps
Appendix G
Rainfall Depth Data
Appendix H
1-Year Storm Event HydroCAD Output Report
Appendix I
50-Year Storm Event HydroCAD Output Report

Hydrology and Erosion Control Study
Rutherfordton Retail Store
1.0 INTRODUCTION
Page 1
The project is located at TBD US HWY 64 within the jurisdictional limits of the Town of
Rutherfordton, NC. The parcel is 2.33 acres. The project will disturb approximately 1.77 acres.
Adjacent to the site is residential homes to the north and east, Old Gilberttown Road to the west and US
HWY 64 to the south to the west. The parcel was previously undeveloped and consists of a vacant
grassed lot. The existing site consists of slopes ranging from 8% to 15%% of stable soils. A GIS map
and copy of the property deed are included in Appendix A.
Existing roadside drainage ditches run along the section of property adjacent to Old Gilberttown Rd
and US HWY 64. Onsite stormwater drains from north to south towards the existing roadside ditches.
Stormwater from these drainage ditches discharge to a cross pipe located at the intersection of Old
Gilberttown Rd and US HWY 64, as well as an additional cross pipe located on the high side of the US
HWY 64 ditch.Currently there are no detention or water quality facilities on site. It is the intent of this
report to demonstrate that the proposed stormwater management facilities will comply with water
quantity and quality controls as regulated by Rutherford County and the state of North Carolina. At the
time of this report, there were no known drainage concerns related to this site or downstream
properties.
An 18" drainage culvert is to be installed at the driveway entrance to convey flows from the existing
roadside drainage ditch. Onsite stormwater will flow to a bioretention pond located in the southwest
corner of the property. Stormwater flows will drain to the bioretention pond via overland sheet flow.
The outlet control structure will release flows from the storage provided in the bioretention basin via 2-
4" perforated underdrains and via a (4) sided open throat outlet control structure. All primary outlets
will be located within the outlet control structure.
2.0 EXECUTIVE SUMMARY
Based on the analysis that follows, the project as proposed will comply with the requirements of
Rutherford County and the state of North Carolina. Details can be found in the following sections
of this report.
Table 2.0: Stormwater Management Summary
Modeled Storm
Pre -Development Flow
Post -Detention Discharge and
Event
(cfs)
Bypass Flow
cfs
1-Year
3.11
2.87
50-Year
13.48
16.78
Modeled flows from the Rutherfordton Retail Store were 8% less than the pre -development flow rates
for the 1-year storm. The proj ect will meet all stormwater quality requirements.

Hydrology and Erosion Control Study
Rutherfordton Retail Store
3.0 EROSION CONTROLS
Page 2
The parcel consists of 2.33 acres. Approximately 1.77 acres will be disturbed by construction
activities. The FEMA Map for this parcel is included in Appendix B. A USDA NRCS Soils Report is
included in Appendix C.
Erosion controls will be completed in a three-phase approach. Refer to the construction plans for
further detail on the erosion control measures. Phase 1 will include site clearing and rough grading.
During this phase, erosion control devices will consist of a construction entrance(s), perimeter silt
fences, temporary ditches, bypass culvert and a skimmer basin. Calculations to support the sizing of
the skimmer basin are present in Appendix D.
Phase 2 will include site development and utility installation. During this phase inlet protection will be
added as construction progresses. Reinforcement fabrics will be installed in permanent ditches as
needed. The skimmer basin will be converted into a bioretention basin as construction progresses. Rip
rap aprons will be added to pipe outfalls.
Phase 3 will consist of site stabilization. Following construction, the site will be stabilized with
vegetation, pavement, buildings, etc.
4.0 STORMWATER QUANTITY ANALYSIS
The following methodology has been incorporated in the analysis and design of the stormwater
detention features of the site. Stormwater was modeled using HydroCAD, Version 10.00. The project
is not located in a FEMA flood zone. All conveyance pipes have been sized to handle the 25-year
storm event.
4.1 Detention Methodology: Stormwater flows will drain to the bioretention basin via overland
sheet flow. The detention system will be designed to comply with NCDEQ development guidelines to
control post developed peak rates of runoff. The detention system will discharge to a cross pipe located
at the intersection of US HWY 64 and Old Gilberttown Rd.
4.2 Allowable Hydrology: Post Developed peak rates of runoff from the subject property must be
kept below or equal to the existing condition flows for the following 24-hour storm events: 1-year. In
addition, the detention basin must be able to pass the 25-year storm without overtopping. Calculations
proving that the pond can handle the 50-year storm without overtopping have been provided in
Appendix J. All calculations are based on the modeled flows at southwest corner of the property as
illustrated on the pre- and post -development drainage area maps (See Appendix F). Please see
Appendix G for rainfall depth used to develop flows for the sub -basins and drainage areas.
The calculated outflow from the Rutherford Retail Store combines the detained flows with the bypass
area identified on the drainage area maps. The hydrograph summary as shown below shows the
difference in existing conditions, routed basin flows and combined proposed flows.

Hydrology and Erosion Control Study
Rutherfordton Retail Store
Table 4.2A: Stormwater Flowrate Analysis
Page 3
Pre -Developed
Proposed flow
Detained flow
Proposed
Total Post -
Flow
to Stormwater
from
Bypass
Developed
Modeled
Basin
Stormwater
Flow
Flow
Storm
Basin
Event
cfs)
(cfs)
(cfs)
(cfs)
(cfs
1-Year
3.11
4.17
1.42
1.45
2.87
50-Year
13.48
11.63
11.17
5.61
16.78
Table 4.2B: Stormwater Staging Analysis
Modeled
Staging
Top of Stormwater
Storm
Elevation
Detention Basin
Freeboard
Event
feet
feet
feet
1-Year
861.84
863.00
1.16
50-Year
862.11
863.00
0.89
Based on the data presented in Tables 3.1A and B, the project is able to detain post -developed flow to
less than pre -developed flows for the 1-year storm events. In addition, the system is able to bypass the
50-year storm event while maintaining 0.89 feet of freeboard.
HydroCAD output reports for the 1 and 50-year rainfall events are presented in Appendices H and I,
respectively. See Site Development Plans for details of the stormwater detention system and outlet
control structure.
5.0 STORMWATER QUALITY ANALYSIS
5.1 Water Quality Volume: NCDEQ requires that the Rutherfordton Retail Store have a minimum
water quality volume (WQv) equal to 1 inch of runoff from the developed site. The required water
quality volume is calculated below.
Total Onsite Area to WQv Basin = 1.44 Acres
WQv = 1.44 acres x 43560 square feet (SF) x 1-inch/12 = 2842 cubic feet (CF)
The project provides 3576 CF of storage below the overflow weir.
5.2 Water Quality Drawdown: NCDEQ requires that the provided WQv be discharged within 5
days. See Site Development Plans for details of the stormwater outlet control structure. Based on the
HydroCAD output report provided in Appendix H, the drawdown time is 24.45 hours for the 1-
year/24-hour storm event.

APPENDIX A
GIS Map
Deed Map

ConnectGIS Feature Report https://rutherfordeounty.connectgis.com/DownloadFile.ashx?i=_ags_ma...
MFCONNECTGIS Printed March 01, 2022
WEB HOSTING J�ji�A,
See Below for Disclaimer
Major Highways
Roads
Lake Lure
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City Limits
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Bostic
Chimney Rock Villa
13 Ellenbolo
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Rutherfordton
Spirldale
Parcels
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County Lines
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S
utherford County Geographic Information Systems (GIS) Data Distribution Disclaimer The County of Rutherford acquires, develops, maintains and uses GIS data
apport of its internal business functions and for the public services it provides. The GIS data which Rutherford County distributes and to which it provides acces
iay not be suitable for other purposes or uses. It is the usera€TIs responsibility to verify any information derived from the GIS data before making any decisions c
3king any actions based on the information. Rutherford County shall not be held liable for any errors in the GIS data. This includes errors of omission, commissio
rrors concerning the content of the data, and relative and positional accuracy of the data. Source information used for this data may have been collected
ifferent scales, times or definitions, resulting in inconsistencies among features represented together on this map. In no event shall Rutherford County becorr
able to users of these data, or any other party, for any loss or direct, indirect, special, incidental or consequential damages, including but not limited to time, mono
r goodwill, arising from the use or modification of the data. The Geographic Information System (GIS) Data made available on the GIS website does not represei
-gaily recorded maps or surveys and is not intended to be used as such. The information contained in GIS data is dynamic and constantly changes over time. Th
ata is not better than the original sources from which they were derived. GIS data should not be used for navigational, tracking or any other purpose requirir
xact measurement of distance or direction or precision in the depiction of geographic features. Nor should it be used for making financial or any oth,
Dmmitments. The maps/data provided herein are for illustration purposes only and are not suitable for site -specific decision making. Parcel data was prepared fc
1 of 2 3/1/2022, 8:18 AM

Pp4e 1 0
In(glfln� ff�lll�tlflfl(IHIINInlllllllll! Ilf�llllllllll IIIIII
Doc ID: 000570660002 Type: CRP
Recorded: 05/10/2006 at 02:59:21 PM
Fee Amt: $17,00 Page 1 of 2
Excise Tax: $0.00
InstrH 2O050o016913
Rutherford County, W
Faye H. Huskey Register of Deeds
SK903 P0307-308
Excise Tax 691-%L/ Recording Time, Book and Page
TaxLot No........................................................................ Parcel Identifier No........................... .......................
Verifiedby............................................................County on the.............. day of ...................................... 20...........
by......................................... ........... ..... ...... ........... ..... ........ .............. ...... ............................................................ I......
Mailafter recording to.............................................................................................................................................
T&F File No. L-197 DEED PREPARATION ONLY, NO TITLE EXAM PERFORMED
This instrument prepared by TOMLIN & FARMER, PLLC, 421 WEST MAIN STREET, SPINDALE, NORTH CARoiiNA 28160
Brief description for index
North side of NC Hwy No. 181
NORTH CAROLINA GENERAL WARRANTY DEED
THIS DEED made this 9' day of May, 2006, by and
GRANTOR
MICHAEL A. LONG and wife, JUDY R.
LONG, and DAVID BARTON LONG, Single
GRANTEE
JOANNE WALLER
59I US Highway 64
Rutherfordton, NC 28139
The designation Grantor and Grantee as used herein shall include said parties, their heirs, successors, and assigns,
and shall include singular, plural, masculine, feminine or neuter as required by context.
WITNESSETH, that the Grantor, for a valuable consideration paid by the grantee, the receipt of which is hereby
acknowledged, has and by these presents does grant, bargain, sell and convey unto the Grantee in fee simple, all that
certain lot or parcel of land situated in RuTHERFOR.DToN TowNsmp, Rutherford County, North Carolina and more
particularly described as follows:
Being the same property as described in deed from J.M. Sherrill and wife, Modene B. Sherrill to Horace W.
Long and wife, Doris Edwards Long dated December 17, 1952 and recorded in Deed Book 220 on Page 9,
Rutherford County Registry, the property hereby conveyed being described according to said deed as follows:
Lying and being in Rutherfordton Township, Rutherford County, North Carolina, and lying on the north side
of North Carolina State Highway No. 181, and being part of that certain tract of land conveyed to A.L.
McKinney and wife, Nora McKinney by J.H. Walker, etal, by deed dated February 20, 1943 and recorded in
Deed Book 183 Page 75 in the Office of the Register of Deeds for Rutherford County, North Carolina, and
being described by metes and bounds as follows:
BEGINNING at a P.O. at the north bank of the old Morganton Road, an old comer of the J.A. Walker land,
and running thence with the old line South 46 West 66 feet to a stake at the old stone pile corner; thence with
another old tine South 18 East (V.1'/z) 370 feet to a stake in the North line of the right of way of Highway No.
181; thence with the right of way of Highway No. 181 North 65'/z East 421 feet to an iron stake in said right of
way line; thence North 24'/z West 407 feet to a stake in the old line on the north bank of the old Morganton
Road; thence with the old line and the north bank of the old Morganton Road South 71 West 300 feet to the
BEGINNING, containing three and one-half (3'/z) acres, surface measure.
The above described lands were conveyed to J.M. Sherrill and wife, Modene B. Sherrill by O.E. McDaniel
and wife, Annie Mae McDaniel. See Book 214 Page 341.
LESS AND EXCEPTING all previous conveyances.
No Title Opinion Rendered by Preparer.
wailer 1-197J3
Book= 903 Page= 307 Seq: 1

The properly hereinabove described was acquired by Grantor by instrument recorded in Book 220 Page 9.
A map showing the above described property is recorded in Plat Book Page
TO HAVE AND TO HOLD the aforesaid lot or parcel of land and all privileges and appurtenances thereto
belonging to the Grantee in fee simple.
And the Grantor covenants with the Grantee, that the Grantor is seized of the premises in fee simple, has the right to
convey the same in fee simple, that title is marketable and free and clear of all encumbrances, and that Grantor will
warrant and defend the title against the lawful claims of all persons whomsoever except for the exceptions hereinafter
stated.
Title to the property hereinabove described is subject to the following exceptions:
Subject to all public utility easements, recorded and unrecorded.
IN WITNESS WHEREOF, the Grantor has hereunto set his hand and seal, or if corporate, has caused this
instrument to be signed in its corporate name by its duly authorized officers and its seal to be hereunto affixed by
authority of its Board of Directors, the day and year first above written.
!� (SEAL) f AL)
MICHAEL A. LONG J 6& R. LO
AL) (SEAL)
4DAVID BARYON LONG
STATE OF NORTH CAROLINA
COUNTY OF RUTHERFORD
I, a Notary Public of the County and St aI'otesaid, certify that MICHAEL A. LONG and wife,
JUDY R. LONG, Grantors, personally appeared before me this day andja�ledged the execution of the
foregoing instrument. Witness my hand and offi 'al stamp or seal, thissday of May, 2006.
,'�� .. Expires:ia
0 t r" Notary Public ffj���ij fia!/I'jE�
..� i / 0
OkRTH CAROLINA
RUTHERFORD
I, a Notary Public of the County and State tesaid, certifythat DAVID BARYON LONG,
Grantor, personally appeared before me this day a d acknowl a execution of the foregoing
instrument. Witness my hand and official stamp o seal, this day of Mpy, 2006.
My Commission Expires:
Notary Public
4* 0
co Z
y' •,—C .
pier i-1 s7.0
Book- 903 Page= 307 Seq: 2

APPENDIX B
FEMA FIRM Map

National Flood Hazard Layer FI RMette
81056'32"W 35o23'45"N
4On.
t " .
r•x
1%;
� r
x + 4 lip r S
4
r4F
• r *}
A . s
- I1:
"AREA F MINIMA FLU D�Fig
��A •tea RAJ
0 250 500 1,000 1,500
FEMA
Feet 1:61000 81055'54"W 35023'15"N
2,000
Basemap: USGS National Map: Orthoimagery: Data refreshed October, 2020
Legend
SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT
Without Base Flood Elevation (BFE)
Zone A, V, A99
SPECIAL FLOOD
Wit h BFE or Depth ZoneAE, AO, AH, VE, AR
HAZARD AREAS
Regulatory Floodway
OTHER AREAS OF
FLOOD HAZARD
0.2% Annual Chance Flood Hazard, Areas
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
4 '- Chance Flood Hazard Zonex
"Area with Reduced Flood Risk due to
Levee. See Notes. zone
" Area with Flood Risk due to Leveezone D
NO SCREEN Area of Minimal Flood Hazard
Q Effective LOMRs
OTHER AREAS
Area of Undetermined Flood Hazard
GENERAL
- — - - Channel, Culvert, or Storm Sewer
STRUCTURES
IIIIIII Levee, Dike, or Floodwall
e n Cross Sections with 1% Annual Chance
17.5 Water Surface Elevation
a - - - Coastal Transect
—sf3^•^•« Base Flood Elevation Line (BFE)
Limit of Study
Jurisdiction Boundary
— --- Coastal Transect Baseline
OTHER
_ Profile Baseline
FEATURES
Hydrographic Feature
❑ Digital Data Available AN
0 No Digital Data Available
MAP PANELS
El Unmapped
QThe
pin displayed on the map is an approximate
point selected by the user and does not represent
an authoritative property location.
This map complies with FEMA's standards for the use of
digital flood maps if it is not void as described below.
The basemap shown complies with FEMA's basemap
accuracy standards
The flood hazard information is derived directly from the
authoritative NFHL web services provided by FEMA. This map
was exported on 3/1/2022 at 10:50 AM and does not
reflect changes or amendments subsequent to this date and
time. The NFHL and effective information may change or
become superseded by new data overtime.
This map image is void if the one or more of the following map
elements do not appear: basemap imagery, flood zone labels,
legend, scale bar, map creation date, community identifiers,
FIRM panel number, and FIRM effective date. Map images for
unmapped and unmodernized areas cannot be used for
regulatory purposes.

APPENDIX C
USDA NRCS Soils Report

USDA united states
Department of
Agriculture
N RCS
Natural
Resources
Conservation
Service
A product of the National
Cooperative Soil Survey,
a joint effort of the United
States Department of
Agriculture and other
Federal agencies, State
agencies including the
Agricultural Experiment
Stations, and local
participants
Custom Soil Resource
Report for
Rutherford County,
North Carolina
February 14, 2022

Preface
Soil surveys contain information that affects land use planning in survey areas.
They highlight soil limitations that affect various land uses and provide information
about the properties of the soils in the survey areas. Soil surveys are designed for
many different users, including farmers, ranchers, foresters, agronomists, urban
planners, community officials, engineers, developers, builders, and home buyers.
Also, conservationists, teachers, students, and specialists in recreation, waste
disposal, and pollution control can use the surveys to help them understand,
protect, or enhance the environment.
Various land use regulations of Federal, State, and local governments may impose
special restrictions on land use or land treatment. Soil surveys identify soil
properties that are used in making various land use or land treatment decisions.
The information is intended to help the land users identify and reduce the effects of
soil limitations on various land uses. The landowner or user is responsible for
identifying and complying with existing laws and regulations.
Although soil survey information can be used for general farm, local, and wider area
planning, onsite investigation is needed to supplement this information in some
cases. Examples include soil quality assessments (http://www.nres.usda.gov/wps/
portal/nres/main/soils/health/) and certain conservation and engineering
applications. For more detailed information, contact your local USDA Service Center
(https:Hoffices.sc.egov.usda.gov/locator/app?agency=nres) or your NRCS State Soil
Scientist (http://www.nres.usda.gov/wps/portal/nres/detail/soils/contactus/?
cid=nres142p2_053951).
Great differences in soil properties can occur within short distances. Some soils are
seasonally wet or subject to flooding. Some are too unstable to be used as a
foundation for buildings or roads. Clayey or wet soils are poorly suited to use as
septic tank absorption fields. A high water table makes a soil poorly suited to
basements or underground installations.
The National Cooperative Soil Survey is a joint effort of the United States
Department of Agriculture and other Federal agencies, State agencies including the
Agricultural Experiment Stations, and local agencies. The Natural Resources
Conservation Service (NRCS) has leadership for the Federal part of the National
Cooperative Soil Survey.
Information about soils is updated periodically. Updated information is available
through the NRCS Web Soil Survey, the site for official soil survey information.
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its
programs and activities on the basis of race, color, national origin, age, disability,
and where applicable, sex, marital status, familial status, parental status, religion,
sexual orientation, genetic information, political beliefs, reprisal, or because all or a
part of an individual's income is derived from any public assistance program. (Not
all prohibited bases apply to all programs.) Persons with disabilities who require

alternative means for communication of program information (Braille, large print,
audiotape, etc.) should contact USDA's TARGET Center at [phone] (voice
and TDD). To file a complaint of discrimination, write to USDA, Director, Office of
Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or
call [phone] (voice) or [phone] (TDD). USDA is an equal opportunity
provider and employer.

Contents

Soil Map
The soil map section includes the soil map for the defined area of interest, a list of
soil map units on the map and extent of each map unit, and cartographic symbols
displayed on the map. Also presented are various metadata about data used to
produce the map, and a description of each soil map unit.

Custom Soil Resource Report
Soil Map
o
414840
414850 414860 414870 414880 414890
414900 414910
35° 23'32"N
93
93
t
e
o_
9
93
o
Soil
MaN may not he valiel at this scale.
35° 23' 29" N
414840
414850 414860 414870 414880 414890
414900 414910
Map Scale: 1:729 if printed on A landscape (11" x 8.5") sheet.
Meters
N
0 10 20 40
60
Feet
0 35 70 140
210
Map projection: Web Mercator Comer coordinates: WGS84 Edge tics: UTM
Zone 17N WGS84
6
o
414920 414930 414940 414950 414960 414970 414980 414990
414920 414930 414940 414950 414960 414970 414980 414990
m
o
m
35° 23' 32" N
1
o_
0
r
�3
35° 23' 29" N

MAP LEGEND
Area of Interest (AOI)
0
Area of Interest (AOI)
Soils
0
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special
Point Features
Iwo
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
�i
Gravelly Spot
Landfill
A.
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
oa
Sodic Spot
Custom Soil Resource Report
MAP INFORMATION
Spoil Area
The soil surveys that comprise your AOI were mapped at
1:24,000.
Stony Spot
Very Stony Spot
Warning: Soil Map may not be valid at this scale.
Wet Spot
Enlargement of maps beyond the scale of mapping can cause
Other
misunderstanding of the detail of mapping and accuracy of soil
�-
Special Line Features
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
Water Features
scale.
Streams and Canals
Transportation
Please rely on the bar scale on each map sheet for map
E F
Rails
measurements.
. 0
Interstate Highways
Source of Map: Natural Resources Conservation Service
US Routes
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Major Roads
Local Roads
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
Background
distance and area. A projection that preserves area, such as the
Aerial Photography
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Rutherford County, North Carolina
Survey Area Data: Version 23, Jan 21, 2022
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Apr 23, 2014—Oct
18, 2017
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.
7

Custom Soil Resource Report
Map Unit Legend
Map Unit Symbol
Map Unit Name
Acres in AOI
Percent of AOI
PaC2
Pacolet sandy clay loam, 8 to
15 percent slopes,
moderately eroded
1.3
100.0%
Totals for Area of Interest
1.3
100.0%
Map Unit Descriptions
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area. The map unit descriptions, along
with the maps, can be used to determine the composition and properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or more
major kinds of soil or miscellaneous areas. A map unit is identified and named
according to the taxonomic classification of the dominant soils. Within a taxonomic
class there are precisely defined limits for the properties of the soils. On the
landscape, however, the soils are natural phenomena, and they have the
characteristic variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is made
up of the soils or miscellaneous areas for which it is named and some minor
components that belong to taxonomic classes other than those of the major soils.
Most minor soils have properties similar to those of the dominant soil or soils in the
map unit, and thus they do not affect use and management. These are called
noncontrasting, or similar, components. They may or may not be mentioned in a
particular map unit description. Other minor components, however, have properties
and behavioral characteristics divergent enough to affect use or to require different
management. These are called contrasting, or dissimilar, components. They
generally are in small areas and could not be mapped separately because of the
scale used. Some small areas of strongly contrasting soils or miscellaneous areas
are identified by a special symbol on the maps. If included in the database for a
given area, the contrasting minor components are identified in the map unit
descriptions along with some characteristics of each. A few areas of minor
components may not have been observed, and consequently they are not
mentioned in the descriptions, especially where the pattern was so complex that it
was impractical to make enough observations to identify all the soils and
miscellaneous areas on the landscape.
The presence of minor components in a map unit in no way diminishes the
usefulness or accuracy of the data. The objective of mapping is not to delineate
pure taxonomic classes but rather to separate the landscape into landforms or
landform segments that have similar use and management requirements. The
delineation of such segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, however,

Custom Soil Resource Report
onsite investigation is needed to define and locate the soils and miscellaneous
areas.
An identifying symbol precedes the map unit name in the map unit descriptions.
Each description includes general facts about the unit and gives important soil
properties and qualities.
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major
horizons that are similar in composition, thickness, and arrangement.
Soils of one series can differ in texture of the surface layer, slope, stoniness,
salinity, degree of erosion, and other characteristics that affect their use. On the
basis of such differences, a soil series is divided into soil phases. Most of the areas
shown on the detailed soil maps are phases of soil series. The name of a soil phase
commonly indicates a feature that affects use or management. For example, Alpha
silt loam, 0 to 2 percent slopes, is a phase of the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps.
The pattern and proportion of the soils or miscellaneous areas are somewhat similar
in all areas. Alpha -Beta complex, 0 to 6 percent slopes, is an example.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of present
or anticipated uses of the map units in the survey area, it was not considered
practical or necessary to map the soils or miscellaneous areas separately. The
pattern and relative proportion of the soils or miscellaneous areas are somewhat
similar. Alpha -Beta association, 0 to 2 percent slopes, is an example.
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion
of the soils or miscellaneous areas in a mapped area are not uniform. An area can
be made up of only one of the major soils or miscellaneous areas, or it can be made
up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation. Rock outcrop is an example.

Custom Soil Resource Report
Rutherford County, North Carolina
PaC2—Pacolet sandy clay loam, 8 to 15 percent slopes, moderately
eroded
Map Unit Setting
National map unit symbol: 3ydp
Elevation: 200 to 1,400 feet
Mean annual precipitation: 37 to 60 inches
Mean annual air temperature: 59 to 66 degrees F
Frost -free period: 200 to 240 days
Farmland classification: Farmland of statewide importance
Map Unit Composition
Pacolet, moderately eroded, and similar soils: 85 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Pacolet, Moderately Eroded
Setting
Landform: Hillslopes on ridges
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Side slope
Down -slope shape: Linear
Across -slope shape: Convex
Parent material: Saprolite derived from granite and gneiss and/or schist
Typical profile
Ap - 0 to 7 inches: sandy clay loam
Bt - 7 to 24 inches: clay
B - 24 to 33 inches: sandy clay loam
C - 33 to 80 inches: loam
Properties and qualities
Slope: 8 to 15 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Runoff class: Medium
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high
(0.57 to 1.98 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water supply, 0 to 60 inches: Moderate (about 7.5 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: B
Hydric soil rating: No
10

APPENDIX D
Skimmer Basin Design Calculations

Civil
� Pa
Rutherfordton Retail Store
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
A
Units
Basin Type
Maximum Drainage Area
Skimmer
10
acre
Drainage Area (DA)
1.15
acre
Disturbed Area
1.10
acre
Runoff Coefficient (C)
Rainfall Intensity (I10)
Top of Water Length
0.95
8.47
N/A
in/hr
feet
Top of Water Width
L/W Ratio
Water Depth
N/A
N/A
2.00
feet
feet
feet
Side Slope Ratio
2.00
X: I
Bottom of Basin Length
N/A
feet
Bottom of Basin Width
N/A
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
9.25
cfs
Minimum Volume
Volume Provided
Minimum Surface Area
1,980
5,140
3,007
cu-ft
cu-ft
sq-ft
Surface Area Provided
3,087
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
1.5
N/A
N/A
inch
Orifice Diameter
1.5
N/A
N/A
inch
Does the basin have a spillway? No
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at T C
2:1 Min, 6:1 Max
Train for Skimmer & Basin
= Lt - 2 (Slope x Depth)
= Wt - 2 (Slope x Depth)
=DAxCxI
In NC assume 3 days
Faircloth Skimmer Chart
Faircloth Orifice Factors
Notes:
1. Spillway dimensions are based on Table 6.60a 'Design of Spillways" from the NC Erosion & Sediment Control Planning & Design
Manual
2. Rainfall Intensity, I, is obtained from Appendix 8.03.07 from the NC Erosion & Sediment Control Planning & Design Manual
3. Skimmer Design is based off of the Faircloth Skimmer Packet
4. Drawdown time is per NCDENR requirements
Issued 3/2/2022

APPENDIX F
Existing and Proposed Drainage Area Maps

NOpTH
0 60
z
01 ----- ---
--
PARCEL I20141O �
DB 859 PG 792 � JOANNE WALLER
PARCEL #: I G3G704
\ _ "� DB 550 PG 317
\ — — —
#4 REBAR, 0.6' A.G. ,:�
\\ — — — — — — — — —
6
\ #4 REBAR, 0.2' B.G.-
5PC(NA083-2011): g°5 v ------ _----------
E= I , 124, G4G. 18' �
\ PRE -DEVELOPMENT DRAINAGE AREA -
\\\ \ \ \ TOTAL: 2.33 ACRES-
\\ IMPERVIOUS:0.00 ACRES
VA A INV:�G43'� oN/
012"CMP
\
INV.: 8G25'
US h11GY1WAY 64
PUBLIC - ASPHALT
OLD G I L13ERTTOWN ROAD �a ;� A / (5EE NOTE #7 REGARDING
PUBLIC - ASPHALT (-9 # 1533) PUBLIC R/W)
(SEE NOTE #7 REGARDING
PllBLIC R/W)11
INV.: 854.9' �c
R85
hVV-55G.2'�
ci"il
Design
Concepts, PA
NCBELS #: C-2184
CATCH BASIN
RIM EL.: 570,74'
INV.: 5G9.2'
RUTHERFORDTON RETAIL STORE
PRE DEVELOPMENT DRAINAGE AREA BULLETIN
MARCH 2O22

n
NOP,fH
60 POST -DEVELOPMENT DRAINAGE AREA
TO BIOPOND \ '
TOTAL:1.44 ACRES
IMPERVIOUS:0.69 ACRES
ci"il
Design
Concepts, PA
NCBELS #: C-2184
OLD G I LDERTTOWN ROAD a
PUBLIC - ASPHALT (SR # 1533) a, 1
(SEE NOTE #7 REGARDING
PUBLIC R/W)
PAMELA O. MOORE
PARCEL #: 120I 4 I O
DB 659 PG 732
\ ---- -- \ POST -DEVELOPMENT DRAINAGE AREA
\''-�9�-----�- TO BYPASS
- - - - - -` TOTAL: 0.89 ACRES
- --_ IMPERMOUS:0.10 ACRES
— — _ — — — — — — — —
_
i _-------- --_ - \_-
(5EE NOTE #7 REGARDING
PUBLIC R/W)
RUTHERFORDTON RETAIL STORE
POST DEVELOPMENT DRAINAGE AREA BULLETIN
MARCH 2O22

APPENDIX G
Rainfall Depth Data

Precipitation Frequency Data Server
https://hdse.nws.noaa.gov/hdse/pfds/pfds printpage.htm1?1at=35.3917&...
NOAA Atlas 14, Volume 2, Version 3
Location name: Rutherfordton, North Carolina, ,,
` USA*
Latitude: 35.3917°, Longitude:-81.937o
Elevation: 969.31 ft**
*source ESRI Maps
**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
o.389
o.463
5
61
0.8
0.90
3
0.9900.51
1.06
5-min
(0.354-0.429)
(0.422-0.510)
(0.500-0.606)
(0.560-0.679)
(0.636-0.775)
(0.690-0.847)
(0.746-0.921)
(0.799-0.997)
(0.866-1.10)
(0.918-1.18)
0.622
0.740
0.882
0.989
1.12
1.23
1.33
1.43
1.57
1.67
10-min
(0.566-0.685)
(0.675-0.815)
(0.801-0.971)
(0.896-1.09)
1 (1.01-1.24)
1 (1.19-1.46)
(1.27-1.58)
(1.37-1.74)
(1.45-1.86)
0.777
0.931
1.12
1.25
1.43
1.55
1.68
1.81
1.97
2.10
15-min
(0.707-0.856)
(0.848-1.02)
(1.01-1.23)
(1.13-1.37)
(1.28-1.57)
1 (1.39-1.71)
1 (1.50-1.85)
1 (1.60-1.99)
(1.72-2.19)
(1.82-2.34)
1.07
1.29
1.59
1.81
2.11
2.34
2.58
2.81
3.14
3.40
30-min
(0.970-1.17)
1 (1.17-1.42)
1 (1.44-1.75)
1 (1.64-1.99)
1 (1.90-2.32)
1 (2.30-2.83)
(2.49-3.10)
(2.74-3.48)
(2.94-3.79)
1.33
1.61
2.03
2.36
2.81
3.17
3.55
3.95
4.50
4.96
60-min
(1.21-1.46)
1 (1.47-1.78)
1 (1.85-2.24)
1 (2.14-2.59)
1 (2.53-3.09)
1 (3.16-3.90)
(3.49-4.35)
(3.94-4.99)
(4.29-5.53)
1.55
1.88
2.38
2.77
3.34
3.80
4.30
4.83
5.60
6.24
2-hr
(1.41-1.70)
1 (1.71-2.07)
1 (2.16-2.61)
1 (2.51-3.05)
1 (3.00-3.67)
1 (3.40-4.18)
1 (3.81-4.74)
1 (4.25-5.33)
(4.86-6.22)
(5.37-6.96)
1.66
2.01
2.54
2.97
3.60
4.13
4.71
5.35
6.28
7.09
3-hr
(1.51-1.85)
1 (1.83-2.23)
1 (2.68-3.28) 11
(3.22-3.98)
1 (4.15-5.22) 11
(4.66-5.95)
(5.40-7.02)
(6.01-7.95)
2.12
2.55
3.17
3.69
4.47
5.13
5.86
6.67
7.87
8.92
6-hr
(1.94-2.33)
1 (2.33-2.80)
1 (3.36-4.05)
(4.03-4.90)
1 (4.59-5.63)
1 (5.19-6.45)
1 (5.85-7.36)
(6.78-8.73)
(7.58-9.92)
2.65
3.18
3.95
4.57
5.47
6.22
7.02
7.90
9.18
10.3
12-h r
(2.43-2.90)
1 (2.92-3.49)
1 (3.61-4.33)
1 (4.17-5.01)
1 (4.95-5.99)
1 (6.28-7.71) A
(6.99-8.70)
(8.02-10.2)
(8.87-11.4)
3.20
3.85
4.82
5.58
6.63
7.47
8.34
9.24
10.5
11.5
24-h r
(2.97-3.45)
1 (3.59-4.16)
1 (4.48-5.19)
1 (5.18-6.01)
1 (6.13-7.13)
1 (7.65-8.97)
(8.45-9.94)
(9.53-11.3)
(10.4-12.4)
3.81
4.58
5.68
6.55
7.74
8.69
9.66
10.7
12.1
13.1
2-day
(3.56-4.09)
1 (4.28-4.92)
1 (5.31-6.10)
1 (6.10-7.03)
1 (7.19-8.29)
1 (8.04-9.31)
1 (8.90-10.4)
1 (9.80-11.4)
(11.0-12.9)
(11.9-14.1)
4.05
4.86
5.99
6.88
8.09
9.05
10.0
11.0
12.4
13.6
3-day
(3.79 4.33)
1 (4.55-5.20)
(5.60-6.41)
1 (6.42-7.36)
1 (7.53-8.65)
1 (8.40-9.68)
1 (9.28-10.7)
1 (10.2-11.8)
(11.4-13.4)
(12.4-14.6)
4.29
5.13
6.30
7.21
8.44
9.42
10.4
11.4
12.8
14.0
4-day
(4.02-4.58)
1 (4.82-5.49)
(5.90-6.73)
1 (6.73-7.70)
1 (7.87-9.01)
1 (8.76-10.1)
1 (9.65-11.1)
1 (10.6-12.2)
1 (11.8-13.8)
(12.8-15.0)
4.99
5.96
7.22
8.22
9.58
10.7
11.7
12.9
14.4
15.6
7-day
(4.70 5.33)
(5.60-6.35)
1 (7.72-8.76)
(8.97-10.2)
(9.95-11.3)
1 (10.9-12.5)
1 (11.9-13.7)
(13.3-15.4)
(14.3-16.7)
10-day
5.70
6.77
8.11
9.15
10.6
11.6
12.7
13.9
15.4
16.5
(5.38-6 06)
(6.39-7.20)
(7.64-8.62)
1 (8.62-9.73)
1 (9.90-11.2)
(10.9-12.4)
1 (11.9-13.5)
1 (12.9-14.7)
(14.2-16.4)
(15.3-17.6)
7.62
9.00
10.6
11.8
13.5
14.7
16.0
17.3
18.9
20.3
20-day
(7.22-806)
1 (8.51-9.51)
1 (10.0-11.2)
1 (11.2-12.5)
1 (12.7-14.2)
1 (15.0-16.9)
(16.1-18.3)
(17.6-20.1)
(18.8-21.5)
30-day
9.34
11.0
12.7
14.0
15.6
16.9
18.1
19.3
20.9
22.1
(8.88 9.84)
1 (10.4-11.6)
1 (13.3-14.7)
(14.8-16.5)
1 (16.0-17.8)
1 (17.1-19.1)
1 (18.2-20.4)
(19.6-22.1)
(20.7-23.4)
45-day
11.8
13.8
15.7
17.1
18.9
20.2
21.4
22.6
24.2
25.3
(113-12.4)
1 (13.2-14.5)
1 (16.3-17.9)
(17.9-19.8)
1 (19.2-21.2)
1 (20.3-22.5)
1 (21.4-23.8)
(22.8-25.4)
(23.9-26.6)
14.1
16.4
18.5
20.0
21.9
23.3
24.7
26.0
27.6
28.8
60-day
(13 5 14.8) 1
(15.7-17.2) 1
(17.6-19.3) 1
(19.1-20.9) 1
(20.9-23.0) I
(22.2-24.5) 1
(23.5-25.9) 1
(24.7-27.3) 1
(26.2-29.0)
(27.3-30.3)
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
1 of 4 2/28/2022, 3:01 PM

Precipitation Frequency Data Server
https://hdse.nws.noaa.gov/hdse/pfds/pfds printpage.htm1?1at=35.3917&...
NOAA Atlas 14, Volume 2, Version 3
Location name: Rutherfordton, North Carolina, ,,
` USA*
Latitude: 35.3917°, Longitude:-81.937o
Elevation: 969.31 ft**
*source ESRI Maps
**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/hour)1
Average
recurrence interval (years)
1
2
5
10
25
50
100
200
500
1000
4.67
5.56
6.61
7.42
8.47
9.25
10.0
10.8
11.9
12.7
5-min
(4.25-5.15)
1 (5.06-6.12)
1 (6.00-7.27)
1 (6.72-8.15)
1 (7.63-9.30)
1 (8.28-10.2)
1 (8.95-11.1)
1 (9.59-12.0)
1 (10.4-13.2)
3.73
4-A4 1
F 5.29
F 5.93
6.74 1
F 7.99
8.59
F 9.40
10.0
10-min
(3.40-4.11)
1 (4.05-4.89)
1 (4.81-5.83)
1 (5.38-6.52)
1 (6.08-7.41)
1 (7.12-8.78)
(7.60-9.48)
1 (8.21-10.4)
1 (8.68-11.2)
3.11
3.72 1
F 4-A6
F 5.00
5.70 1
F 6.22
6.73
7.23
F 7.88
8.38
15-min
(2.83-3.42)
1 (3.39-4.10)
1 (4.05-4.91)
1 (4.53-5.49)
1 (5.14-6.26)
1 (5.57-6.83)
1 (6.00-7.40)
1 (6.39-7.98)
1 (6.90-8.74)
1 (7.26-9.35)
2.13
2.57
3.17
3.62
4.22
4.68
5.15
5.63
6.27
6.79
30-min
(1.94-2.35)
1 (2.34-2.83)
1 (3.28-3.98)
(3.80-4.64)
1 (4.19-5.14)
1 (4.59-5.67)
1 (4.98-6.21)
1 (5.49-6.96)
(5.88-7.57)
1.33
1.61
2.03
2.36
2.81
3.17
3.55
3.95
4.50
4.96
60-min
(1.21-1.46)
1 (1.47-1.78)
1 (1.85-2.24)
1 (2.14-2.59)
1 (2.53-3.09)
1 (3.16-3.90)
(3.49-4.35)
1 (3.94-4.99)
1 (4.29-5.53)
0.773
0.940
1.19
1.39
1.67
1.90
2.15
2.41
2.80
3.12
2-hr
(0.704-0.852)
(0.856-1.03)
1 (1.08-1.31)
1 (1.25-1.52)
1 (1.50-1.83)
1 (1.70-2.09)
1 (1.91-2.37)
1 (2.12-2.67)
1 (2.43-3.11)
1 (2.68-3.48)
0.554
0.670
0.844
0.988
1.20
1.38
1.57
1.78
2.09
2.36
3-hr
(0.503-0.615)
(0.609-0.744)
(0.765-0.935)
(0.891-1.09)
1 (1.07-1.33)
1 (1.22-1.52)
1 (1.38-1.74)
1 (1.55-1.98)
1 (1.80-2.34)
(2.00-2.65)
0.354
0.426
0.529
0.616
0.746
0.857
0.979
1.11
1.32
1.49
6-hr
(0.324-0.389)
(0.390-0.468)
(0.483-0.581)
(0.561-0.677)
(0.673-0.818)
(0.767-0.941)
(0.867-1.08)
(0.976-1.23)
1 (1.13-1.46)
1 (1.26-1.66)
0.220
0.264
0.328
0.379
0.454
0.516
0.583
0.655
0.762
0.852
12-h r
(0.201-0.241)
(0.242-0.290)
(0.299-0.359)
(0.346-0.416)
(0.411-0.497)
(0.465-0.566)
(0.521-0.640)
(0.580-0.722)
(0.666-0.843)
(0.736-0.948)
0.133
0. 661
0.201
0.233
0.276
0.311
0.348
0.385
0 4-37-1
0.478
24-h r
(0.124-0.144)
(0.150-0.173)
(0.187-0.216)
(0.216-0.250)
(0.255-0.297)
(0.287-0.335)
(0.319-0.374)
(0.352-0.414)
(0.397-0.470)
(0.433-0.515)
0.079
0.095
0.118
0.136
0.161
0.181
0.201
0.222
0.251
0.274
2-day
(0.074-0.085)
(0.089-0.102)
(0.111-0.127)
(0.127-0.146)
(0.150-0.173)
(0.167-0.194)
(0.185-0.216)
(0.204-0.238)
(0.229-0.270)
(0.249-0.295)
0.056
0.067
0.083
0.096
0.112
0.126
0.139
0.153
0.173
0.188
3-day
(0.053 0.060)
(0.063-0.072)
(0.078-0.089)
(0.089-0.102)
(0.105-0.120)
(0.117-0.134)
(0.129-0.149)
(0.141-0.164)
(0.158-0.185)
(0.172-0.202)
o o45
0.053
0.066
0.075
0.088
0.098
0.108
0.119
0.134
0.145
4-day
(0.042-0.048)
(0.050-0.057)
(0.061-0.070)
(0.070-0.080)
(0.082-0.094)
(0.091-0.105)
(0.101-0.116)
(0.110-0.127)
(0.123-0.143)
(0.133-0.156)
0.030
0.035
0.043
0.049
0.057
0.063
0.070
0.077
0.086
0.093
7-day
(0.028 0.032)
(0.033-0.038)
(0.040-0.046)
(0.046-0.052)
(0.053-0.061)
(0.059-0.068)
(0.065-0.074)
(0.071-0.082)
(0.079-0.091)
(0.085-0.099)
0.024
0.028
0.034
0.038
0.044
0.049
0.053
0.058
0.064
0.069
10-day
(0.022-0 025)
(0.027-0.030)
(0.032-0.036)
(0.036-0.041)
(0.041-0.047)
(0.045-0.052)
(0.050-0.056)
(0.054-0.061)
(0.059-0.068)
(0.064-0.073)
0.016
0.019
0.022
0. 225
0. 228
0.031
0.033
0.036
0.0-39-1
0.042
20-day
(0.015-0 017)
(0.018-0.020)
(0.021-0.023)
(0.023-0.026)
(0.026-0.030)
(0.029-0.032)
(0.031-0.035)
(0.034-0.038)
(0.037-0.042)
(0.039-0.045)
0.013
0.015
0.018
0.019
0.022
0.023
0.025
0.027
0.029
0.031
30-day
(0.012 0.014)
(0.014-0.016)
(0.017-0.019)
(0.018-0.020)
(0.021-0.023)
(0.022-0.025)
(0.024-0.027)
(0.025-0.028)
(0.027-0.031)
(0.029-0.032)
0.011
0.013
0.015
0.016
0.017
0.019
0.020
0.021
0.022
0.023
45-day
(0.010-0.011)
(0.012-0.013)
(0.014-0.015)
(0.015-0.017)
(0.017-0.018)
(0.018-0.020)
(0.019-0.021)
(0.020-0.022)
(0.021-0.024)
(0.022-0.025)
0.010
0.011
0.013
0.014
0.015
0.016
0.017
0.018
0.019
0.020
60-day
(0.009 0.010)
(0.011-0.012)
(0.012-0.013)
(0.013-0.015)
(0.015-0.016)
(0.015-0.017)
(0.016-0.018)
(0.017-0.019)
(0.018-0.020)
(0.019-0.021)
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
1 of 4 3/1/2022, 7:42 AM

APPENDIX H
1-Year Storm Event
HydroCAD Output Report

1S (2S) 3S
Pre Development Post Dev lopment Bypass
4P
Bioretention Pond
Subcat Reach on Link Routing Diagram for HyrdoCAD
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net, Printed 3/2/2022
HydroCAD®10.10-6a Sampler sin S20432 © 2020 HydroCAD Software Solutions LLC

HyrdoCAD
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 2
Rainfall Events Listing
Event# Event Storm Type Curve Mode Duration B/B Depth AMC
Name (hours) (inches)
1 1-year Type II 24-hr Default 24.00 1 3.20 2
2 50-year Type II 24-hr Default 24.00 1 6.63 2

HyrdoCAD Type 11 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 3
Summary for Subcatchment 1 S: Pre Development
Runoff = 3.11 cfs @ 11.97 hrs, Volume= 0.151 af, Depth= 0.78"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-60.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-year Rainfall=3.20"
Area (ac) CN Description
2.330 69 50-75% Grass cover, Fair, HSG B
2.330 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
■ Runoff

HyrdoCAD Type 11 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 10
Summary for Subcatchment 2S: Post Development
Runoff = 4.17 cfs @ 11.96 hrs, Volume= 0.193 af, Depth= 1.61"
Routed to Pond 4P : Bioretention Pond
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-60.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-year Rainfall=3.20"
Area (ac) CN Description
0.750 69 50-75% Grass cover, Fair, HSG B
0.690 98 Impervious, HSG B
1.440 83 Weighted Average
0.750 52.08% Pervious Area
0.690 47.92% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
■ Runoff

HyrdoCAD Type 11 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 17
Summary for Subcatchment 3S: Bypass
Runoff = 1.45 cfs @ 11.97 hrs, Volume= 0.069 af, Depth= 0.93"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-60.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-year Rainfall=3.20"
Area (ac) CN Description
0.790 69 50-75% Grass cover, Fair, HSG B
0.100 98 Impervious, HSG B
0.890 72 Weighted Average
0.790 88.76% Pervious Area
0.100 11.24% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
❑ Runoff
N
U
3
0
LL

HyrdoCAD Type 11 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/10/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 29
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Pond 4P: Bioretention Pond
Inflow Area =
62,726 sf,
47.92% Impervious,
Inflow Depth = 1.61" for 1-year event
Inflow =
4.17 cfs @
11.96 hrs, Volume=
8,412 cf
Outflow =
1.42 cfs @
12.10 hrs, Volume=
4,835 cf, Atten= 66%, Lag= 8.6 min
Primary =
1.42 cfs @
12.10 hrs, Volume=
4,835 cf
Routing by Stor-Ind method, Time Span= 5.00-60.00 hrs, dt= 0.05 hrs
Peak Elev= 861.84' @ 12.10 hrs Surf.Area= 2,484 sf Storage= 3,797 cf
Plug -Flow detention time= 214.3 min calculated for 4,835 cf (57% of inflow)
Center -of -Mass det. time= 96.8 min ( 925.6 - 828.8 )
Volume Invert
Avail.Storage Storage Description
#1 857.82'
7,022 cf Custom Stage Data (Irregular) Listed below (Recalc)
Elevation Surf.Area
Perim. Voids Inc.Store Cum.Store Wet.Area
(feet)
(sq-ft)
(feet) (%) (cubic -feet) (cubic -feet)
(sq-ft)
857.82
2,084
229.2 0.0 0 0
2,084
857.83
2,084
229.2 40.0 8 8
2,086
858.49
2,084
229.2 40.0 550 559
2,238
858.50
2,084
229.2 25.0 5 564
2,240
860.99
2,084
229.2 25.0 1,297 1,861
2,811
861.00
2,084
229.2 100.0 21 1,882
2,813
862.00
2,564
250.1 100.0 2,320 4,202
3,645
863.00
3,085
271.0 100.0 2,820 7,022
4,550
Device Routing
Invert
Outlet Devices
#1 Primary
857.83'
18.0" Round Culvert
L= 21.2' CPP, projecting, no headwall, Ke= 0.900
Inlet / Outlet Invert= 857.83' / 857.72' S= 0.0052 '/' Cc= 0.900
n= 0.013, Flow Area= 1.77 sf
#2 Device 1
861.75'
48.0" W x 6.0" H Vert. Orifice/Grate X 4.00 C= 0.600
Limited to weir flow at low heads
#3 Device 1
857.82'
4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at
low heads
#4 Device 3
857.82'
2.000 in/hr Exfiltration over Horizontal area from 857.82'
- 861.00'
Conductivity to Groundwater Elevation = 855.82'
Excluded Horizontal area = 2,084 sf
Primary OutFlow Max=1.37 cfs @ 12.10 hrs HW=861.84' (Free Discharge)
L1=Culvert (Passes 1.37 cfs of 12.13 cfs potential flow)
�2=Orifice/Grate (Orifice Controls 1.37 cfs @ 0.96 fps)
__3=Orifi ce/G rate (Passes 0.00 cfs of 0.82 cfs potential flow)
L4=Exfiltration ( Controls 0.00 cfs)

HyrdoCAD
Type // 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 25
F Inflow
❑ Primary
N
U

HyrdoCAD
Type // 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 26
Pond 4P: Bioretention Pond
Stage -Discharge
■ Primary
Discharge (cfs)

HyrdoCAD Type // 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 27
w
Pond 4P: Bioretention Pond
Stage -Area -Storage
Surface/Horizontal/Wetted Are- jsq-ft)
200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 2,600 2,800 3,000
Storage (cubic -feet)
Surface
O Storage

HyrdoCAD Type // 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 28
Hydrograph for Pond 4P: Bioretention Pond
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
5.00
0.00
0
857.82
0.00
5.25
0.00
0
857.82
0.00
5.50
0.00
0
857.82
0.00
5.75
0.00
0
857.82
0.00
6.00
0.00
0
857.82
0.00
6.25
0.00
0
857.82
0.00
6.50
0.00
0
857.82
0.00
6.75
0.00
0
857.82
0.00
7.00
0.00
0
857.82
0.00
7.25
0.00
0
857.82
0.00
7.50
0.00
0
857.82
0.00
7.75
0.00
0
857.82
0.00
8.00
0.00
0
857.82
0.00
8.25
0.00
0
857.82
0.00
8.50
0.00
0
857.82
0.00
8.75
0.00
2
857.82
0.00
9.00
0.01
7
857.83
0.00
9.25
0.01
15
857.84
0.00
9.50
0.01
26
857.85
0.00
9.75
0.02
41
857.87
0.00
10.00
0.03
61
857.89
0.00
10.25
0.03
87
857.92
0.00
10.50
0.04
122
857.97
0.00
10.75
0.06
169
858.02
0.00
11.00
0.08
233
858.10
0.00
11.25
0.12
322
858.21
0.00
11.50
0.18
454
858.37
0.00
11.75
1.08
898
859.14
0.00
12.00
3.65
3,301
861.64
0.00
12.25
0.54
3,697
861.80
0.60
12.50
0.36
3,659
861.78
0.39
12.75
0.27
3,638
861.78
0.28
13.00
0.23
3,630
861.77
0.24
13.25
0.20
3,624
861.77
0.20
13.50
0.17
3,620
861.77
0.18
13.75
0.15
3,616
861.77
0.16
14.00
0.14
3,613
861.77
0.14
14.25
0.13
3,611
861.76
0.13
14.50
0.12
3,610
861.76
0.12
14.75
0.12
3,609
861.76
0.12
15.00
0.11
3,608
861.76
0.11
15.25
0.10
3,607
861.76
0.11
15.50
0.10
3,606
861.76
0.10
15.75
0.09
3,605
861.76
0.09
16.00
0.09
3,604
861.76
0.09
16.25
0.08
3,603
861.76
0.08

HyrdoCAD Type // 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 29
Hydrograph for Pond 4P: Bioretention Pond (continued)
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
16.50
0.08
3,602
861.76
0.08
16.75
0.08
3,602
861.76
0.08
17.00
0.08
3,602
861.76
0.08
17.25
0.07
3,601
861.76
0.07
17.50
0.07
3,601
861.76
0.07
17.75
0.07
3,600
861.76
0.07
18.00
0.07
3,600
861.76
0.07
18.25
0.07
3,600
861.76
0.07
18.50
0.06
3,599
861.76
0.06
18.75
0.06
3,599
861.76
0.06
19.00
0.06
3,598
861.76
0.06
19.25
0.06
3,598
861.76
0.06
19.50
0.05
3,598
861.76
0.05
19.75
0.05
3,597
861.76
0.05
20.00
0.05
3,597
861.76
0.05
20.25
0.05
3,597
861.76
0.05
20.50
0.05
3,596
861.76
0.05
20.75
0.05
3,596
861.76
0.05
21.00
0.05
3,596
861.76
0.05
21.25
0.05
3,596
861.76
0.05
21.50
0.05
3,596
861.76
0.05
21.75
0.05
3,596
861.76
0.05
22.00
0.05
3,596
861.76
0.05
22.25
0.05
3,596
861.76
0.05
22.50
0.04
3,596
861.76
0.04
22.75
0.04
3,596
861.76
0.04
23.00
0.04
3,596
861.76
0.04
23.25
0.04
3,596
861.76
0.04
23.50
0.04
3,596
861.76
0.04
23.75
0.04
3,595
861.76
0.04
24.00
0.04
3,595
861.76
0.04
24.25
0.00
3,583
861.75
0.01
24.50
0.00
3,578
861.75
0.00
24.75
0.00
3,577
861.75
0.00
25.00
0.00
3,576
861.75
0.00
25.25
0.00
3,576
861.75
0.00
25.50
0.00
3,576
861.75
0.00
25.75
0.00
3,576
861.75
0.00
26.00
0.00
3,576
861.75
0.00
26.25
0.00
3,576
861.75
0.00
26.50
0.00
3,576
861.75
0.00
26.75
0.00
3,576
861.75
0.00
27.00
0.00
3,576
861.75
0.00
27.25
0.00
3,576
861.75
0.00
27.50
0.00
3,576
861.75
0.00
27.75
0.00
3,576
861.75
0.00

HyrdoCAD Type // 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 30
Hydrograph for Pond 4P: Bioretention Pond (continued)
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
28.00
0.00
3,576
861.75
0.00
28.25
0.00
3,576
861.75
0.00
28.50
0.00
3,576
861.75
0.00
28.75
0.00
3,576
861.75
0.00
29.00
0.00
3,576
861.75
0.00
29.25
0.00
3,576
861.75
0.00
29.50
0.00
3,576
861.75
0.00
29.75
0.00
3,576
861.75
0.00
30.00
0.00
3,576
861.75
0.00
30.25
0.00
3,576
861.75
0.00
30.50
0.00
3,576
861.75
0.00
30.75
0.00
3,576
861.75
0.00
31.00
0.00
3,576
861.75
0.00
31.25
0.00
3,576
861.75
0.00
31.50
0.00
3,576
861.75
0.00
31.75
0.00
3,576
861.75
0.00
32.00
0.00
3,576
861.75
0.00
32.25
0.00
3,576
861.75
0.00
32.50
0.00
3,576
861.75
0.00
32.75
0.00
3,576
861.75
0.00
33.00
0.00
3,576
861.75
0.00
33.25
0.00
3,576
861.75
0.00
33.50
0.00
3,576
861.75
0.00
33.75
0.00
3,576
861.75
0.00
34.00
0.00
3,576
861.75
0.00
34.25
0.00
3,576
861.75
0.00
34.50
0.00
3,576
861.75
0.00
34.75
0.00
3,576
861.75
0.00
35.00
0.00
3,576
861.75
0.00
35.25
0.00
3,576
861.75
0.00
35.50
0.00
3,576
861.75
0.00
35.75
0.00
3,576
861.75
0.00
36.00
0.00
3,576
861.75
0.00
36.25
0.00
3,576
861.75
0.00
36.50
0.00
3,576
861.75
0.00
36.75
0.00
3,576
861.75
0.00
37.00
0.00
3,576
861.75
0.00
37.25
0.00
3,576
861.75
0.00
37.50
0.00
3,576
861.75
0.00
37.75
0.00
3,576
861.75
0.00
38.00
0.00
3,576
861.75
0.00
38.25
0.00
3,576
861.75
0.00
38.50
0.00
3,576
861.75
0.00
38.75
0.00
3,576
861.75
0.00
39.00
0.00
3,576
861.75
0.00
39.25
0.00
3,576
861.75
0.00

HyrdoCAD Type 11 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 31
Hydrograph for Pond 4P: Bioretention Pond (continued)
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
39.50
0.00
3,576
861.75
0.00
39.75
0.00
3,576
861.75
0.00
40.00
0.00
3,576
861.75
0.00
40.25
0.00
3,576
861.75
0.00
40.50
0.00
3,576
861.75
0.00
40.75
0.00
3,576
861.75
0.00
41.00
0.00
3,576
861.75
0.00
41.25
0.00
3,576
861.75
0.00
41.50
0.00
3,576
861.75
0.00
41.75
0.00
3,576
861.75
0.00
42.00
0.00
3,576
861.75
0.00
42.25
0.00
3,576
861.75
0.00
42.50
0.00
3,576
861.75
0.00
42.75
0.00
3,576
861.75
0.00
43.00
0.00
3,576
861.75
0.00
43.25
0.00
3,576
861.75
0.00
43.50
0.00
3,576
861.75
0.00
43.75
0.00
3,576
861.75
0.00
44.00
0.00
3,576
861.75
0.00
44.25
0.00
3,576
861.75
0.00
44.50
0.00
3,576
861.75
0.00
44.75
0.00
3,576
861.75
0.00
45.00
0.00
3,576
861.75
0.00
45.25
0.00
3,576
861.75
0.00
45.50
0.00
3,576
861.75
0.00
45.75
0.00
3,576
861.75
0.00
46.00
0.00
3,576
861.75
0.00
46.25
0.00
3,576
861.75
0.00
46.50
0.00
3,576
861.75
0.00
46.75
0.00
3,576
861.75
0.00
47.00
0.00
3,576
861.75
0.00
47.25
0.00
3,576
861.75
0.00
47.50
0.00
3,576
861.75
0.00
47.75
0.00
3,576
861.75
0.00
48.00
0.00
3,576
861.75
0.00
48.25
0.00
3,576
861.75
0.00
48.50
0.00
3,576
861.75
0.00
48.75
0.00
3,576
861.75
0.00
49.00
0.00
3,576
861.75
0.00
49.25
0.00
3,576
861.75
0.00
49.50
0.00
3,576
861.75
0.00
49.75
0.00
3,576
861.75
0.00
50.00
0.00
3,576
861.75
0.00
50.25
0.00
3,576
861.75
0.00
50.50
0.00
3,576
861.75
0.00
50.75
0.00
3,576
861.75
0.00

HyrdoCAD Type // 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 32
Hydrograph for Pond 4P: Bioretention Pond (continued)
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
51.00
0.00
3,576
861.75
0.00
51.25
0.00
3,576
861.75
0.00
51.50
0.00
3,576
861.75
0.00
51.75
0.00
3,576
861.75
0.00
52.00
0.00
3,576
861.75
0.00
52.25
0.00
3,576
861.75
0.00
52.50
0.00
3,576
861.75
0.00
52.75
0.00
3,576
861.75
0.00
53.00
0.00
3,576
861.75
0.00
53.25
0.00
3,576
861.75
0.00
53.50
0.00
3,576
861.75
0.00
53.75
0.00
3,576
861.75
0.00
54.00
0.00
3,576
861.75
0.00
54.25
0.00
3,576
861.75
0.00
54.50
0.00
3,576
861.75
0.00
54.75
0.00
3,576
861.75
0.00
55.00
0.00
3,576
861.75
0.00
55.25
0.00
3,576
861.75
0.00
55.50
0.00
3,576
861.75
0.00
55.75
0.00
3,576
861.75
0.00
56.00
0.00
3,576
861.75
0.00
56.25
0.00
3,576
861.75
0.00
56.50
0.00
3,576
861.75
0.00
56.75
0.00
3,576
861.75
0.00
57.00
0.00
3,576
861.75
0.00
57.25
0.00
3,576
861.75
0.00
57.50
0.00
3,576
861.75
0.00
57.75
0.00
3,576
861.75
0.00
58.00
0.00
3,576
861.75
0.00
58.25
0.00
3,576
861.75
0.00
58.50
0.00
3,576
861.75
0.00
58.75
0.00
3,576
861.75
0.00
59.00
0.00
3,576
861.75
0.00
59.25
0.00
3,576
861.75
0.00
59.50
0.00
3,576
861.75
0.00
59.75
0.00
3,576
861.75
0.00
60.00
0.00
3,576
861.75
0.00

HyrdoCAD Type // 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 33
Elevation Primary
(feet)
(cfs)
857.82
0.00
857.83
0.00
857.84
0.00
857.85
0.00
857.86
0.00
857.87
0.00
857.88
0.00
857.89
0.00
857.90
0.00
857.91
0.00
857.92
0.00
857.93
0.00
857.94
0.00
857.95
0.00
857.96
0.00
857.97
0.00
857.98
0.00
857.99
0.00
858.00
0.00
858.01
0.00
858.02
0.00
858.03
0.00
858.04
0.00
858.05
0.00
858.06
0.00
858.07
0.00
858.08
0.00
858.09
0.00
858.10
0.00
858.11
0.00
858.12
0.00
858.13
0.00
858.14
0.00
858.15
0.00
858.16
0.00
858.17
0.00
858.18
0.00
858.19
0.00
858.20
0.00
858.21
0.00
858.22
0.00
858.23
0.00
858.24
0.00
858.25
0.00
858.26
0.00
858.27
0.00
Stage -Discharge for Pond 4P: Bioretention Pond
Elevation Primary
(feet)
(cfs)
858.28
0.00
858.29
0.00
858.30
0.00
858.31
0.00
858.32
0.00
858.33
0.00
858.34
0.00
858.35
0.00
858.36
0.00
858.37
0.00
858.38
0.00
858.39
0.00
858.40
0.00
858.41
0.00
858.42
0.00
858.43
0.00
858.44
0.00
858.45
0.00
858.46
0.00
858.47
0.00
858.48
0.00
858.49
0.00
858.50
0.00
858.51
0.00
858.52
0.00
858.53
0.00
858.54
0.00
858.55
0.00
858.56
0.00
858.57
0.00
858.58
0.00
858.59
0.00
858.60
0.00
858.61
0.00
858.62
0.00
858.63
0.00
858.64
0.00
858.65
0.00
858.66
0.00
858.67
0.00
858.68
0.00
858.69
0.00
858.70
0.00
858.71
0.00
858.72
0.00
858.73
0.00
Elevation Primary
(feet)
(cfs)
858.74
0.00
858.75
0.00
858.76
0.00
858.77
0.00
858.78
0.00
858.79
0.00
858.80
0.00
858.81
0.00
858.82
0.00
858.83
0.00
858.84
0.00
858.85
0.00
858.86
0.00
858.87
0.00
858.88
0.00
858.89
0.00
858.90
0.00
858.91
0.00
858.92
0.00
858.93
0.00
858.94
0.00
858.95
0.00
858.96
0.00
858.97
0.00
858.98
0.00
858.99
0.00
859.00
0.00
859.01
0.00
859.02
0.00
859.03
0.00
859.04
0.00
859.05
0.00
859.06
0.00
859.07
0.00
859.08
0.00
859.09
0.00
859.10
0.00
859.11
0.00
859.12
0.00
859.13
0.00
859.14
0.00
859.15
0.00
859.16
0.00
859.17
0.00
859.18
0.00
859.19
0.00
Elevation Primary
(feet)
(cfs)
859.20
0.00
859.21
0.00
859.22
0.00
859.23
0.00
859.24
0.00
859.25
0.00
859.26
0.00
859.27
0.00
859.28
0.00
859.29
0.00
859.30
0.00
859.31
0.00
859.32
0.00
859.33
0.00
859.34
0.00
859.35
0.00
859.36
0.00
859.37
0.00
859.38
0.00
859.39
0.00
859.40
0.00
859.41
0.00
859.42
0.00
859.43
0.00
859.44
0.00
859.45
0.00
859.46
0.00
859.47
0.00
859.48
0.00
859.49
0.00
859.50
0.00
859.51
0.00
859.52
0.00
859.53
0.00
859.54
0.00
859.55
0.00
859.56
0.00
859.57
0.00
859.58
0.00
859.59
0.00
859.60
0.00
859.61
0.00
859.62
0.00
859.63
0.00
859.64
0.00
859.65
0.00

HyrdoCAD Type // 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 34
Stage -Discharge for Pond 4P: Bioretention Pond (continued)
Elevation Primary
(feet)
(cfs)
859.66
0.00
859.67
0.00
859.68
0.00
859.69
0.00
859.70
0.00
859.71
0.00
859.72
0.00
859.73
0.00
859.74
0.00
859.75
0.00
859.76
0.00
859.77
0.00
859.78
0.00
859.79
0.00
859.80
0.00
859.81
0.00
859.82
0.00
859.83
0.00
859.84
0.00
859.85
0.00
859.86
0.00
859.87
0.00
859.88
0.00
859.89
0.00
859.90
0.00
859.91
0.00
859.92
0.00
859.93
0.00
859.94
0.00
859.95
0.00
859.96
0.00
859.97
0.00
859.98
0.00
859.99
0.00
860.00
0.00
860.01
0.00
860.02
0.00
860.03
0.00
860.04
0.00
860.05
0.00
860.06
0.00
860.07
0.00
860.08
0.00
860.09
0.00
860.10
0.00
860.11
0.00
Elevation Primary
(feet)
(cfs)
860.12
0.00
860.13
0.00
860.14
0.00
860.15
0.00
860.16
0.00
860.17
0.00
860.18
0.00
860.19
0.00
860.20
0.00
860.21
0.00
860.22
0.00
860.23
0.00
860.24
0.00
860.25
0.00
860.26
0.00
860.27
0.00
860.28
0.00
860.29
0.00
860.30
0.00
860.31
0.00
860.32
0.00
860.33
0.00
860.34
0.00
860.35
0.00
860.36
0.00
860.37
0.00
860.38
0.00
860.39
0.00
860.40
0.00
860.41
0.00
860.42
0.00
860.43
0.00
860.44
0.00
860.45
0.00
860.46
0.00
860.47
0.00
860.48
0.00
860.49
0.00
860.50
0.00
860.51
0.00
860.52
0.00
860.53
0.00
860.54
0.00
860.55
0.00
860.56
0.00
860.57
0.00
Elevation Primary
(feet)
(cfs)
860.58
0.00
860.59
0.00
860.60
0.00
860.61
0.00
860.62
0.00
860.63
0.00
860.64
0.00
860.65
0.00
860.66
0.00
860.67
0.00
860.68
0.00
860.69
0.00
860.70
0.00
860.71
0.00
860.72
0.00
860.73
0.00
860.74
0.00
860.75
0.00
860.76
0.00
860.77
0.00
860.78
0.00
860.79
0.00
860.80
0.00
860.81
0.00
860.82
0.00
860.83
0.00
860.84
0.00
860.85
0.00
860.86
0.00
860.87
0.00
860.88
0.00
860.89
0.00
860.90
0.00
860.91
0.00
860.92
0.00
860.93
0.00
860.94
0.00
860.95
0.00
860.96
0.00
860.97
0.00
860.98
0.00
860.99
0.00
861.00
0.00
861.01
0.00
861.02
0.00
861.03
0.00
Elevation Primary
(feet)
(cfs)
861.04
0.00
861.05
0.00
861.06
0.00
861.07
0.00
861.08
0.00
861.09
0.00
861.10
0.00
861.11
0.00
861.12
0.00
861.13
0.00
861.14
0.00
861.15
0.00
861.16
0.00
861.17
0.00
861.18
0.00
861.19
0.00
861.20
0.00
861.21
0.00
861.22
0.00
861.23
0.00
861.24
0.00
861.25
0.00
861.26
0.00
861.27
0.00
861.28
0.00
861.29
0.00
861.30
0.00
861.31
0.00
861.32
0.00
861.33
0.00
861.34
0.00
861.35
0.00
861.36
0.00
861.37
0.00
861.38
0.00
861.39
0.00
861.40
0.00
861.41
0.00
861.42
0.00
861.43
0.00
861.44
0.00
861.45
0.00
861.46
0.00
861.47
0.00
861.48
0.00
861.49
0.00

HyrdoCAD Type // 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 35
Stage -Discharge for Pond 4P: Bioretention Pond (continued)
Elevation Primary
(feet)
(cfs)
861.50
0.00
861.51
0.00
861.52
0.00
861.53
0.00
861.54
0.00
861.55
0.00
861.56
0.00
861.57
0.00
861.58
0.00
861.59
0.00
861.60
0.00
861.61
0.00
861.62
0.00
861.63
0.00
861.64
0.00
861.65
0.00
861.66
0.00
861.67
0.00
861.68
0.00
861.69
0.00
861.70
0.00
861.71
0.00
861.72
0.00
861.73
0.00
861.74
0.00
861.75
0.00
861.76
0.05
861.77
0.15
861.78
0.27
861.79
0.41
861.80
0.57
861.81
0.75
861.82
0.95
861.83
1.16
861.84
1.39
861.85
1.62
861.86
1.87
861.87
2.13
861.88
2.41
861.89
2.69
861.90
2.98
861.91
3.29
861.92
3.60
861.93
3.92
861.94
4.25
861.95
4.59
Elevation Primary
(feet)
(cfs)
861.96
4.94
861.97
5.30
861.98
5.67
861.99
6.04
862.00
6.42
862.01
6.81
862.02
7.21
862.03
7.61
862.04
8.02
862.05
8.44
862.06
8.86
862.07
9.30
862.08
9.74
862.09
10.18
862.10
10.63
862.11
11.09
862.12
11.56
862.13
12.03
862.14
12.51
862.15
12.69
862.16
12.71
862.17
12.73
862.18
12.75
862.19
12.76
862.20
12.78
862.21
12.80
862.22
12.82
862.23
12.83
862.24
12.85
862.25
12.87
862.26
12.89
862.27
12.90
862.28
12.92
862.29
12.94
862.30
12.96
862.31
12.97
862.32
12.99
862.33
13.01
862.34
13.03
862.35
13.04
862.36
13.06
862.37
13.08
862.38
13.09
862.39
13.11
862.40
13.13
862.41
13.15
Elevation Primary
(feet)
(cfs)
862.42
13.16
862.43
13.18
862.44
13.20
862.45
13.21
862.46
13.23
862.47
13.25
862.48
13.27
862.49
13.28
862.50
13.30
862.51
13.32
862.52
13.33
862.53
13.35
862.54
13.37
862.55
13.38
862.56
13.40
862.57
13.42
862.58
13.43
862.59
13.45
862.60
13.47
862.61
13.49
862.62
13.50
862.63
13.52
862.64
13.54
862.65
13.55
862.66
13.57
862.67
13.59
862.68
13.60
862.69
13.62
862.70
13.63
862.71
13.65
862.72
13.67
862.73
13.68
862.74
13.70
862.75
13.72
862.76
13.73
862.77
13.75
862.78
13.77
862.79
13.78
862.80
13.80
862.81
13.82
862.82
13.83
862.83
13.85
862.84
13.86
862.85
13.88
862.86
13.90
862.87
13.91
Elevation Primary
(feet)
(cfs)
862.88
13.93
862.89
13.95
862.90
13.96
862.91
13.98
862.92
13.99
862.93
14.01
862.94
14.03
862.95
14.04
862.96
14.06
862.97
14.07
862.98
14.09
862.99
14.11
863.00
14.12

HyrdoCAD Type // 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 36
Stage -Area -Storage for Pond 4P: Bioretention Pond
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
857.82
2,084
0
857.83
2,084
8
857.84
2,084
17
857.85
2,084
25
857.86
2,084
33
857.87
2,084
42
857.88
2,084
50
857.89
2,084
58
857.90
2,084
67
857.91
2,084
75
857.92
2,084
83
857.93
2,084
92
857.94
2,084
100
857.95
2,084
108
857.96
2,084
117
857.97
2,084
125
857.98
2,084
133
857.99
2,084
142
858.00
2,084
150
858.01
2,084
158
858.02
2,084
167
858.03
2,084
175
858.04
2,084
183
858.05
2,084
192
858.06
2,084
200
858.07
2,084
208
858.08
2,084
217
858.09
2,084
225
858.10
2,084
233
858.11
2,084
242
858.12
2,084
250
858.13
2,084
258
858.14
2,084
267
858.15
2,084
275
858.16
2,084
283
858.17
2,084
292
858.18
2,084
300
858.19
2,084
308
858.20
2,084
317
858.21
2,084
325
858.22
2,084
333
858.23
2,084
342
858.24
2,084
350
858.25
2,084
358
858.26
2,084
367
858.27
2,084
375
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
858.28
2,084
383
858.29
2,084
392
858.30
2,084
400
858.31
2,084
408
858.32
2,084
417
858.33
2,084
425
858.34
2,084
433
858.35
2,084
442
858.36
2,084
450
858.37
2,084
458
858.38
2,084
467
858.39
2,084
475
858.40
2,084
483
858.41
2,084
492
858.42
2,084
500
858.43
2,084
508
858.44
2,084
517
858.45
2,084
525
858.46
2,084
534
858.47
2,084
542
858.48
2,084
550
858.49
2,084
559
858.50
2,084
564
858.51
2,084
569
858.52
2,084
574
858.53
2,084
579
858.54
2,084
585
858.55
2,084
590
858.56
2,084
595
858.57
2,084
600
858.58
2,084
605
858.59
2,084
611
858.60
2,084
616
858.61
2,084
621
858.62
2,084
626
858.63
2,084
631
858.64
2,084
637
858.65
2,084
642
858.66
2,084
647
858.67
2,084
652
858.68
2,084
658
858.69
2,084
663
858.70
2,084
668
858.71
2,084
673
858.72
2,084
678
858.73
2,084
684

HyrdoCAD Type // 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 37
Stage -Area -Storage for Pond 4P: Bioretention Pond (continued)
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
858.74
2,084
689
858.75
2,084
694
858.76
2,084
699
858.77
2,084
704
858.78
2,084
710
858.79
2,084
715
858.80
2,084
720
858.81
2,084
725
858.82
2,084
730
858.83
2,084
736
858.84
2,084
741
858.85
2,084
746
858.86
2,084
751
858.87
2,084
756
858.88
2,084
762
858.89
2,084
767
858.90
2,084
772
858.91
2,084
777
858.92
2,084
783
858.93
2,084
788
858.94
2,084
793
858.95
2,084
798
858.96
2,084
803
858.97
2,084
809
858.98
2,084
814
858.99
2,084
819
859.00
2,084
824
859.01
2,084
829
859.02
2,084
835
859.03
2,084
840
859.04
2,084
845
859.05
2,084
850
859.06
2,084
855
859.07
2,084
861
859.08
2,084
866
859.09
2,084
871
859.10
2,084
876
859.11
2,084
882
859.12
2,084
887
859.13
2,084
892
859.14
2,084
897
859.15
2,084
902
859.16
2,084
908
859.17
2,084
913
859.18
2,084
918
859.19
2,084
923
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
859.20
2,084
928
859.21
2,084
934
859.22
2,084
939
859.23
2,084
944
859.24
2,084
949
859.25
2,084
954
859.26
2,084
960
859.27
2,084
965
859.28
2,084
970
859.29
2,084
975
859.30
2,084
981
859.31
2,084
986
859.32
2,084
991
859.33
2,084
996
859.34
2,084
1,001
859.35
2,084
1,007
859.36
2,084
1,012
859.37
2,084
1,017
859.38
2,084
1,022
859.39
2,084
1,027
859.40
2,084
1,033
859.41
2,084
1,038
859.42
2,084
1,043
859.43
2,084
1,048
859.44
2,084
1,053
859.45
2,084
1,059
859.46
2,084
1,064
859.47
2,084
1,069
859.48
2,084
1,074
859.49
2,084
1,080
859.50
2,084
1,085
859.51
2,084
1,090
859.52
2,084
1,095
859.53
2,084
1,100
859.54
2,084
1,106
859.55
2,084
1,111
859.56
2,084
1,116
859.57
2,084
1,121
859.58
2,084
1,126
859.59
2,084
1,132
859.60
2,084
1,137
859.61
2,084
1,142
859.62
2,084
1,147
859.63
2,084
1,152
859.64
2,084
1,158
859.65
2,084
1,163

HyrdoCAD Type // 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 38
Stage -Area -Storage for Pond 4P: Bioretention Pond (continued)
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
859.66
2,084
1,168
859.67
2,084
1,173
859.68
2,084
1,179
859.69
2,084
1,184
859.70
2,084
1,189
859.71
2,084
1,194
859.72
2,084
1,199
859.73
2,084
1,205
859.74
2,084
1,210
859.75
2,084
1,215
859.76
2,084
1,220
859.77
2,084
1,225
859.78
2,084
1,231
859.79
2,084
1,236
859.80
2,084
1,241
859.81
2,084
1,246
859.82
2,084
1,251
859.83
2,084
1,257
859.84
2,084
1,262
859.85
2,084
1,267
859.86
2,084
1,272
859.87
2,084
1,277
859.88
2,084
1,283
859.89
2,084
1,288
859.90
2,084
1,293
859.91
2,084
1,298
859.92
2,084
1,304
859.93
2,084
1,309
859.94
2,084
1,314
859.95
2,084
1,319
859.96
2,084
1,324
859.97
2,084
1,330
859.98
2,084
1,335
859.99
2,084
1,340
860.00
2,084
1,345
860.01
2,084
1,350
860.02
2,084
1,356
860.03
2,084
1,361
860.04
2,084
1,366
860.05
2,084
1,371
860.06
2,084
1,376
860.07
2,084
1,382
860.08
2,084
1,387
860.09
2,084
1,392
860.10
2,084
1,397
860.11
2,084
1,403
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
860.12
2,084
1,408
860.13
2,084
1,413
860.14
2,084
1,418
860.15
2,084
1,423
860.16
2,084
1,429
860.17
2,084
1,434
860.18
2,084
1,439
860.19
2,084
1,444
860.20
2,084
1,449
860.21
2,084
1,455
860.22
2,084
1,460
860.23
2,084
1,465
860.24
2,084
1,470
860.25
2,084
1,475
860.26
2,084
1,481
860.27
2,084
1,486
860.28
2,084
1,491
860.29
2,084
1,496
860.30
2,084
1,502
860.31
2,084
1,507
860.32
2,084
1,512
860.33
2,084
1,517
860.34
2,084
1,522
860.35
2,084
1,528
860.36
2,084
1,533
860.37
2,084
1,538
860.38
2,084
1,543
860.39
2,084
1,548
860.40
2,084
1,554
860.41
2,084
1,559
860.42
2,084
1,564
860.43
2,084
1,569
860.44
2,084
1,574
860.45
2,084
1,580
860.46
2,084
1,585
860.47
2,084
1,590
860.48
2,084
1,595
860.49
2,084
1,601
860.50
2,084
1,606
860.51
2,084
1,611
860.52
2,084
1,616
860.53
2,084
1,621
860.54
2,084
1,627
860.55
2,084
1,632
860.56
2,084
1,637
860.57
2,084
1,642

HyrdoCAD Type // 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 39
Stage -Area -Storage for Pond 4P: Bioretention Pond (continued)
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
860.58
2,084
1,647
860.59
2,084
1,653
860.60
2,084
1,658
860.61
2,084
1,663
860.62
2,084
1,668
860.63
2,084
1,673
860.64
2,084
1,679
860.65
2,084
1,684
860.66
2,084
1,689
860.67
2,084
1,694
860.68
2,084
1,700
860.69
2,084
1,705
860.70
2,084
1,710
860.71
2,084
1,715
860.72
2,084
1,720
860.73
2,084
1,726
860.74
2,084
1,731
860.75
2,084
1,736
860.76
2,084
1,741
860.77
2,084
1,746
860.78
2,084
1,752
860.79
2,084
1,757
860.80
2,084
1,762
860.81
2,084
1,767
860.82
2,084
1,772
860.83
2,084
1,778
860.84
2,084
1,783
860.85
2,084
1,788
860.86
2,084
1,793
860.87
2,084
1,798
860.88
2,084
1,804
860.89
2,084
1,809
860.90
2,084
1,814
860.91
2,084
1,819
860.92
2,084
1,825
860.93
2,084
1,830
860.94
2,084
1,835
860.95
2,084
1,840
860.96
2,084
1,845
860.97
2,084
1,851
860.98
2,084
1,856
860.99
2,084
1,861
861.00
2,084
1,882
861.01
2,089
1,903
861.02
2,093
1,924
861.03
2,098
1,945
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
861.04
2,102
1,966
861.05
2,107
1,987
861.06
2,111
2,008
861.07
2,116
2,029
861.08
2,121
2,050
861.09
2,125
2,071
861.10
2,130
2,093
861.11
2,134
2,114
861.12
2,139
2,135
861.13
2,144
2,157
861.14
2,148
2,178
861.15
2,153
2,200
861.16
2,157
2,221
861.17
2,162
2,243
861.18
2,167
2,264
861.19
2,171
2,286
861.20
2,176
2,308
861.21
2,181
2,330
861.22
2,185
2,351
861.23
2,190
2,373
861.24
2,195
2,395
861.25
2,199
2,417
861.26
2,204
2,439
861.27
2,209
2,461
861.28
2,213
2,483
861.29
2,218
2,506
861.30
2,223
2,528
861.31
2,227
2,550
861.32
2,232
2,572
861.33
2,237
2,595
861.34
2,242
2,617
861.35
2,246
2,639
861.36
2,251
2,662
861.37
2,256
2,685
861.38
2,261
2,707
861.39
2,265
2,730
861.40
2,270
2,752
861.41
2,275
2,775
861.42
2,280
2,798
861.43
2,284
2,821
861.44
2,289
2,844
861.45
2,294
2,866
861.46
2,299
2,889
861.47
2,303
2,912
861.48
2,308
2,936
861.49
2,313
2,959

HyrdoCAD Type // 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 40
Stage -Area -Storage for Pond 4P: Bioretention Pond (continued)
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
861.50
2,318
2,982
861.51
2,323
3,005
861.52
2,327
3,028
861.53
2,332
3,052
861.54
2,337
3,075
861.55
2,342
3,098
861.56
2,347
3,122
861.57
2,352
3,145
861.58
2,356
3,169
861.59
2,361
3,192
861.60
2,366
3,216
861.61
2,371
3,240
861.62
2,376
3,263
861.63
2,381
3,287
861.64
2,385
3,311
861.65
2,390
3,335
861.66
2,395
3,359
861.67
2,400
3,383
861.68
2,405
3,407
861.69
2,410
3,431
861.70
2,415
3,455
861.71
2,420
3,479
861.72
2,425
3,503
861.73
2,430
3,528
861.74
2,434
3,552
861.75
2,439
3,576
861.76
2,444
3,601
861.77
2,449
3,625
861.78
2,454
3,650
861.79
2,459
3,674
861.80
2,464
3,699
861.81
2,469
3,724
861.82
2,474
3,748
861.83
2,479
3,773
861.84
2,484
3,798
861.85
2,489
3,823
861.86
2,494
3,848
861.87
2,499
3,873
861.88
2,504
3,898
861.89
2,509
3,923
861.90
2,514
3,948
861.91
2,519
3,973
861.92
2,524
3,998
861.93
2,529
4,023
861.94
2,534
4,049
861.95
2,539
4,074
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
861.96
2,544
4,100
861.97
2,549
4,125
861.98
2,554
4,151
861.99
2,559
4,176
862.00
2,564
4,202
862.01
2,569
4,227
862.02
2,574
4,253
862.03
2,579
4,279
862.04
2,584
4,305
862.05
2,589
4,331
862.06
2,594
4,356
862.07
2,599
4,382
862.08
2,604
4,408
862.09
2,609
4,434
862.10
2,614
4,461
862.11
2,619
4,487
862.12
2,624
4,513
862.13
2,629
4,539
862.14
2,634
4,566
862.15
2,639
4,592
862.16
2,644
4,618
862.17
2,649
4,645
862.18
2,654
4,671
862.19
2,659
4,698
862.20
2,664
4,725
862.21
2,669
4,751
862.22
2,674
4,778
862.23
2,680
4,805
862.24
2,685
4,831
862.25
2,690
4,858
862.26
2,695
4,885
862.27
2,700
4,912
862.28
2,705
4,939
862.29
2,710
4,966
862.30
2,715
4,993
862.31
2,720
5,021
862.32
2,725
5,048
862.33
2,731
5,075
862.34
2,736
5,103
862.35
2,741
5,130
862.36
2,746
5,157
862.37
2,751
5,185
862.38
2,756
5,212
862.39
2,761
5,240
862.40
2,767
5,268
862.41
2,772
5,295

HyrdoCAD Type 11 24-hr 1-year Rainfall=3.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 41
Stage -Area -Storage for Pond 4P: Bioretention Pond (continued)
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
862.42
2,777
5,323
862.43
2,782
5,351
862.44
2,787
5,379
862.45
2,792
5,407
862.46
2,798
5,435
862.47
2,803
5,463
862.48
2,808
5,491
862.49
2,813
5,519
862.50
2,818
5,547
862.51
2,824
5,575
862.52
2,829
5,603
862.53
2,834
5,632
862.54
2,839
5,660
862.55
2,845
5,688
862.56
2,850
5,717
862.57
2,855
5,745
862.58
2,860
5,774
862.59
2,866
5,803
862.60
2,871
5,831
862.61
2,876
5,860
862.62
2,881
5,889
862.63
2,887
5,918
862.64
2,892
5,947
862.65
2,897
5,975
862.66
2,902
6,004
862.67
2,908
6,034
862.68
2,913
6,063
862.69
2,918
6,092
862.70
2,924
6,121
862.71
2,929
6,150
862.72
2,934
6,180
862.73
2,940
6,209
862.74
2,945
6,238
862.75
2,950
6,268
862.76
2,956
6,297
862.77
2,961
6,327
862.78
2,966
6,357
862.79
2,972
6,386
862.80
2,977
6,416
862.81
2,982
6,446
862.82
2,988
6,476
862.83
2,993
6,506
862.84
2,998
6,536
862.85
3,004
6,566
862.86
3,009
6,596
862.87
3,015
6,626
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
862.88
3,020
6,656
862.89
3,025
6,686
862.90
3,031
6,716
862.91
3,036
6,747
862.92
3,042
6,777
862.93
3,047
6,808
862.94
3,052
6,838
862.95
3,058
6,869
862.96
3,063
6,899
862.97
3,069
6,930
862.98
3,074
6,961
862.99
3,080
6,991
863.00
3,085
7,022

APPENDIX I
50-Year Storm Event
HydroCAD Output Report

HyrdoCAD Type/1 24-hr 50-year Rainfall=6.63"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 42
Summary for Subcatchment 1 S: Pre Development
Runoff = 13.48 cfs @ 11.96 hrs, Volume= 0.624 af, Depth= 3.21"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-60.00 hrs, dt= 0.05 hrs
Type II 24-hr 50-year Rainfall=6.63"
Area (ac) CN Description
2.330 69 50-75% Grass cover, Fair, HSG B
2.330 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
1
1
1
1
1
1
Subcatchment 1S: Pre Development
Hydrograph
6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)
■ Runoff

HyrdoCAD Type/1 24-hr 50-year Rainfall=6.63"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 49
Summary for Subcatchment 2S: Post Development
Runoff = 11.63 cfs @ 11.95 hrs, Volume= 0.562 af, Depth> 4.68"
Routed to Pond 4P : Bioretention Pond
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-60.00 hrs, dt= 0.05 hrs
Type II 24-hr 50-year Rainfall=6.63"
Area (ac) CN Description
0.750 69 50-75% Grass cover, Fair, HSG B
0.690 98 Impervious, HSG B
1.440 83 Weighted Average
0.750 52.08% Pervious Area
0.690 47.92% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
■ Runoff

HyrdoCAD Type/1 24-hr 50-year Rainfall=6.63"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 56
Summary for Subcatchment 3S: Bypass
Runoff = 5.61 cfs @ 11.96 hrs, Volume= 0.261 af, Depth= 3.52"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-60.00 hrs, dt= 0.05 hrs
Type II 24-hr 50-year Rainfall=6.63"
Area (ac) CN Description
0.790 69 50-75% Grass cover, Fair, HSG B
0.100 98 Impervious, HSG B
0.890 72 Weighted Average
0.790 88.76% Pervious Area
0.100 11.24% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
■ Runoff
N
U
3
0
LL

HyrdoCAD Type/1 24-hr 50-year Rainfall=6.63"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/10/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 69
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Pond 4P: Bioretention Pond
Inflow Area =
62,726 sf,
47.92% Impervious,
Inflow Depth > 4.68" for 50-year event
Inflow =
11.63 cfs @
11.95 hrs, Volume=
24,461 cf
Outflow =
11.17 cfs @
11.97 hrs, Volume=
20,884 cf, Atten= 4%, Lag= 1.1 min
Primary =
11.17 cfs @
11.97 hrs, Volume=
20,884 cf
Routing by Stor-Ind method, Time Span= 5.00-60.00 hrs, dt= 0.05 hrs
Peak Elev= 862.11' @ 11.97 hrs Surf.Area= 2,620 sf Storage= 4,491 cf
Plug -Flow detention time= 100.2 min calculated for 20,865 cf (85% of inflow)
Center -of -Mass det. time= 33.5 min ( 831.9 - 798.4 )
Volume Invert
Avail.Storage Storage Description
#1 857.82'
7,022 cf Custom Stage Data (Irregular) Listed below (Recalc)
Elevation Surf.Area
Perim. Voids Inc.Store Cum.Store Wet.Area
(feet)
(sq-ft)
(feet) (%) (cubic -feet) (cubic -feet)
(sq-ft)
857.82
2,084
229.2 0.0 0 0
2,084
857.83
2,084
229.2 40.0 8 8
2,086
858.49
2,084
229.2 40.0 550 559
2,238
858.50
2,084
229.2 25.0 5 564
2,240
860.99
2,084
229.2 25.0 1,297 1,861
2,811
861.00
2,084
229.2 100.0 21 1,882
2,813
862.00
2,564
250.1 100.0 2,320 4,202
3,645
863.00
3,085
271.0 100.0 2,820 7,022
4,550
Device Routing
Invert
Outlet Devices
#1 Primary
857.83'
18.0" Round Culvert
L= 21.2' CPP, projecting, no headwall, Ke= 0.900
Inlet / Outlet Invert= 857.83' / 857.72' S= 0.0052 '/' Cc= 0.900
n= 0.013, Flow Area= 1.77 sf
#2 Device 1
861.75'
48.0" W x 6.0" H Vert. Orifice/Grate X 4.00 C= 0.600
Limited to weir flow at low heads
#3 Device 1
857.82'
4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at
low heads
#4 Device 3
857.82'
2.000 in/hr Exfiltration over Horizontal area from 857.82'
- 861.00'
Conductivity to Groundwater Elevation = 855.82'
Excluded Horizontal area = 2,084 sf
Primary OutFlow Max=10.82 cfs @ 11.97 hrs HW=862.10' (Free Discharge)
L1=Culvert (Passes 10.82 cfs of 12.61 cfs potential flow)
�2=Orifice/Grate (Orifice Controls 10.82 cfs @ 1.91 fps)
__3=Orifi ce/G rate (Passes 0.00 cfs of 0.85 cfs potential flow)
L4=Exfiltration ( Controls 0.00 cfs)

HyrdoCAD
Type // 24-hr 50-year Rainfall=6.63"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 64
N
U
Pond 4P: Bioretention Pond
Hydrograph
Time (hours)
F Inflow
❑ Primary

HyrdoCAD
Type // 24-hr 50-year Rainfall=6.63"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 65
Pond 4P: Bioretention Pond
Stage -Discharge
■ Primary
Discharge (cfs)

HyrdoCAD Type // 24-hr 50-year Rainfall=6.63"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 3/2/2022
HydroCAD® 10.10-6a Sampler s/n S20432 © 2020 HydroCAD Software Solutions LLC Page 66
w
Pond 4P: Bioretention Pond
Stage -Area -Storage
Surface/Horizontal/Wetted Are- jsq-ft)
200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 2,600 2,800 3,000
Storage (cubic -feet)
Surface
O Storage