20190788 Ver 1_Minor Variance_20190612

K" r_0Water ResourcesENTAL QUALITY
15ANCAC 0213.0233 (8)(b),.0243 (8)(b),.0250 (11)(b), .0259 (8)(b),.0267 (11)(c), .0607 (e)(2)
Protection and Maintenance of Riparian Areas Rules - Variance Application
E -FORM VAR 10-2018
Submittal Application dated 6/12/2019
A. General Project Information
For instructions on how to fill out this form, seethe Major and Minor Variance Help Document posted on DWR's 401 & Buffer
Permitting page.
Please note: fields marked with a red asterisk below are required. You will not be able to submit the form until all mandatory questions
are answered.
1a. Is this a transportation r Yes
project?* r No
B. Please Identify Which Riparian Area Protection Rule Applies:
1. Type of Variance: r Major Variance
r Minor Variance
Link to the 401 and Buffer Permitting Statues and Rules: https://deq.nc.gov/about/divisions/water-resources/water-resources-rules/401-
certification-express-review -statutes-rules-guides
r Neuse River Basin (15A NCAC 02B.0233)
r Catawba River Basin (15A NCAC 02B.0243)
r Randleman Lake Watershed (15A NCAC 02B.0250)
r Tar -Pamlico River Basin (15A NCAC 02B.0259)
r Jordan Lake Watershed (15A NCAC 0213.0267)
C. Applicant/Owner Information
.....................................................................................................................................................................................
Who is submitting the application:* F Owner
F
Applicant other than
Owner
V Agent
Check all that apply.
Is there an agent working on the project but not submitting it?
r Yes
r No
Primary Contact:
Primary Contact Email:
1. Property Owner:
Kevin C Martin
This is for w ho should be notified if a payrrent is required.
[e-mail]

1a. Name:*
New Trinity Missionary Baptist Church
1b. Title:
Deacon (Michael Sims)
1c. Mailing Address:*
Street Address
115 S. Robertson St.
Address Line 2
Oty
Clayton
Postal / Zip Code
27528
1d. Telephone:*
919-606-5012
1e. Email Address:*
[e-mail]
3. Agent Information:
State / Province / Region
NC
Country
US
3a. Name:* Kevin Martin
3b. Company Affiliation:* Soil & Environmental Consultants, PA
3c. Mailing Address:* Street Address
8412 Falls of Neuse Road, Suite 104
Address Line 2
Oty
Raleigh
Postal / Zip Code
27615
3d. Telephone:* 9198465900
3e. Email Address:* [e-mail]
3f. Attach an agent authorization form.*
Click the upload button or drag and drop files here to attach docurrent
signed owner cert agent auth.pdf 261.56KB
FDF Only
State / Province / Fbgion
North Carolina
Country
USA
D. Project Information
.........................................................................................................................................................................................................................................................................................
1. Project Name:* New Trinity Misionary Baptist Church - New Sanctuary Building
(Subdivision, facility, or establishrrent narre)
2. County(ies)*
Johnston
3. Property Location:
3a. Property Address:*

Street Address
347 W. Main St. and 317 W. Second St.
Address Line 2
Oty
Clayton
F bstal / Zip Code
27528
3b. Latitude:
35.655078
State / Province / Fbgion
NC
Country
US
3c. Longitude:
-78.462967
3d. Attach an 8 % x 11 excerpt from the most recent version of the USGS topographic map indicating the location
of the site.
Click the upload button or drag and drop files here to attach docurrent
CLAYTON USGS.pdf 351.98KB
PDF Only
* USGS Topo look up
3e. Attach an 8'/z x 11 excerpt from the most recent version of the published County NRCS Soil Survey Map
depicting the project site.
Oick the upload button or drag and drop files here to attach docurrent
soils map.pdf
FDF only
684.56KB
Link to Soil Surveys for North Carolina Counties. (Please see instructions in the Help Document to determine the most recent
published version.)
4. Property Information:
4a. Parcel Identification Number (PIN)
165916-93-7608
165916-93-7577
4b. Date Property Purchased:
04/11/2006
nTddd/yyyy
4c. Type of B F
Book# Page# I
Deed 3099 172
-IFMap NA
4d. Attach a copy of the recorded map that indicates when the lot was last platted.
Click the upload button or drag and drop files here to attach document
PDF_PRINT_MAP_1560193147.pdf 638.25KB
PDF Only
4e. Is your project in one of the 20 Coastal Counties covered under the Coastal Area Management Act (CAMA)?*
(' Yes c-- No
n

4f. Is the project located within a NC DCM Area of Environmental Concern (AEC)?*
f Yes r No r Unknown
5. Stream associated with riparian buffer to be impacted by the proposed activity:
Name 11 Water Quality Classification
UT of Little Creek C; NSW
7. List any permits/approvals that have been requested or obtained for this project in the past.
Date Applied Date Received Permit Type
E. Proposed Activity
1. Provide a detailed description of the proposed activity including its purpose:*
Redevelopment of existing Church and commercial property to allow for expansion of church. Specifically a new
larger Sanctuary to meet the needs of an expanding congregation
2. Attach a site plan as applicable to the project:
(lick the upload button or drag and drop files here to attach docurrent
buffer variance impacts -New Trinity_6-7-201 9.pdf 237.54KB
FDF only
*' Below is a link with instructions on what you will need to show on your site plan.
http://edocs.deq.nc.gov/WaterResources/O/doc/402224/Pagel.aspx
F. Proposed Impacts and Mitigation Information
......................................................................................................................................................................................................................................................................................................................................................................................................................................................
1. Individually list the square footage of each proposed impact to the protected riparian buffers:
1 a. Site# - Reason 1 b. Buffer 1 c. Stream Name 1d. Mitigation 1 f. Zone 1 1 g. Zone 2
Impact* Required?
N/A Temporary No 0.00 0.00
Nbp label (e.g. Finad Crossing 1) (T) Square Feet Square Feet
1h. Total Zone 1 Impacts: 0.00
1i. Total Zone 2 Impacts: 1,042.0
0
Proposed 1 Story Church
Permanent
UT Little Creek
Yes
0.00
774.00
Bldg
(P)
Square Feet
Square Feet
IVhp label (e.g. Finad Crossing 1)
N/A Temporary No 0.00 0.00
Nbp label (e.g. Finad Crossing 1) (T) Square Feet Square Feet
1h. Total Zone 1 Impacts: 0.00
1i. Total Zone 2 Impacts: 1,042.0
0
Bioretention Cell
Permanent
UT Little Creek
Yes
0.00
268.00
N/hp label (e.g. Finad Crossing 1)
(P)
Square Feet
Square Feet
N/A Temporary No 0.00 0.00
Nbp label (e.g. Finad Crossing 1) (T) Square Feet Square Feet
1h. Total Zone 1 Impacts: 0.00
1i. Total Zone 2 Impacts: 1,042.0
0

1j. Total Buffer Impacts: 1,042.0
0
1k. Comments:
Calculated Mitigation
11. Zone 1
Total Impact
Multiplier
Required Mitigation
Square Feet
Square Feet
0.00
Square Feet
3
0.00
Square Feet
1m. Zone 2
Total Impact Multiplier Required Mitigation
1,042.00
1.50
1,563.00
Square Feet
Square Feet
2. Mitigation Information
2a. What is the mitigation plan proposed for this project?*
rJ Payment to private mitigation bank
r Payment to Division of Mitigation (DMS)
Permittee responsible mitigation
2d. Attach statement of availability from mitigation provider.*
New Trinity Baptist Church - Buffer SOA 6-11-19.pdf 122.48KB
2f. Comments:
G. Stormwater
1. Provide a description of how diffuse flow will be maintained through the protected riparian buffers (e.g., re-
planting vegetation or enhancement of existing vegetation, gutter splash pads, level spreader to control of
runoff from impervious surfaces, etc.).*
Danny Smith and Stephanie Goss previously evaluated the site and determined the limits of existing uses
(specifically parking, buildings and driveways) that are exempt from the buffer rules and can continue to be used for
their existing use so no stormwater plans are provided for those areas. However the new impervious area will be
treated by a bioretention cell (see attached impact maps for location) which will discharge to an existing stormwater
collection system. Calculations for the bioretention cell are attached.
A significant portion of the new sanctuary will be constructed where existing buildings or other imperviuos surfaces
exist.
2. Show the location of diffuse flow measure(s) on your site plan.
Qick the upload button or drag and drop files here to attach docurrent
New Trinity Missionary Baptist-bioretention cell. pdf 156.94KB
FDF only
3. Attach a completed Level Spreader Supplement Form or BMP Supplement Form with all required items for
each proposed measure.

Click the upload button or drag and drop files here to attach docurrent
FDF Only
4. Attach an Operation and Maintenance (O&M) Form for each proposed level spreader or BMP.
(lick the upload button or drag and drop files here to attach docurrant
PDF Only
H. Demonstration of Need for a Variance ^
The variance provision of the riparian buffer rules allows the Division or the Environrrental Ivbnagerrent Corrrrission to grant a variance when there are practical difficulties or
unnecessary hardships that prevent compliance with the strict letter of riparian buffer protection.
.................................................................................................................................................................................................................................................................................................................................................................................................................................................
1. Explain how complying with the provisions of the applicable rule would prevent you from securing a
reasonable return from or make reasonable use of your property. Merely proving that the variance would permit
a greater profit from the property shall not be considered adequate justification for a variance. The Division will
consider whether the variance is the minimum possible deviation from the terms of the applicable Buffer Rule
that shall make reasonable use of the property possible.*
The sanctuary expansion is need to accommodate the increasing congregation size. The existing sanctuary will
remain in use during construction of the new sanctuary then it will be demolished and the new parking lot will go
where the old sanctuary was Iocated.They are not even meeting minimum parking requirements for town
requirements but are applying for a special use permit for less parking and having shared parking with the church
across the street. If not for this even more buffer impact would be required.
2. Explain how the hardship results from application of the Buffer Rule to the property rather from other factors
such as deed restrictions or other hardships (e.g. zoning setbacks, floodplains, etc).*
The small areas requested to be impacted are actually separated from the undisturbed stream buffer by areas of
driveways and parking. Therefore the function of these areas as far as nutrient removal are limited. In addition the
areas are currently maintained as a lawn.
3. Explain whether the hardship was caused by the applicant knowingly or unknowingly violating the applicable
Buffer Rule.*
The site is not currently in violation of the buffer rule
4. Explain how the hardship results from physical nature of the property, such as its size, shape, or topography,
which is different form that of neighboring property.*
As described above, this is a developed site in downtown Clayton, much of the buffer contains buildings, parking or
driveways built long before the rules were adopted. Because of the need to expand the church and the limited area
available to do so in proximity to existing church buildings, the proposed expansion is the minimum size that will meet
the current and projected needs of the church. The building has been designed to minimize impact size and located
so that the least functional area of the zone 2 buffer is impacted. In addition, stormwater from new impervious is
being treated by a bioretention cell. Were it not for the variance the Town of Clayton would only require stormwater
quantity , not quality, control.
5. Explain how the hardship is rare or unique to the applicant's property, rather than the result of conditions that
are widespread.*
The segment of stream that is exposed is unique in that upstream of the property the stream is piped in its entirety
and down stream it is piped for at least 1200'.
For Neuse, Tar -Pamlico, Jordan Lake and Goose Creek only:
6. Did the applicant purchase the property after the effective date of the applicable Buffer Rule and then request
a variance?*
Yes, but the property has been in existence for so long there are no recorded maps of the property, just deeds.
I. Sign and Submit
Deed Restrictions
By your signature of this application, you certify that all structural stormwater BMPs required by this variance shall be located in recorded

drainage easements, that the easements will run with the land, that the easements cannot be changed or deleted without concurrence
from the State, and that the easements will be recorded prior to the sale of any lot.
Applicant's Certification
I, certify that the information included on this permit application form is correct, that the project will be constructed in conformance with
the approved plans and that the deed restrictions will be recorded with all required permit conditions.
* V By checking the box and signing the box below I certify that:
By digitally signing below, I certify that:
• I have given true, accurate, and complete information on this form;
• I agree that submission of this form is a "transaction" subject to Chapter 66, Article 40 of the NC General Statutes (the "Uniform
Electronic Transactions Act")
• I agree to conduct this transaction by electronic means pursuant to Chapter 66, Article 40 of the NC General Statutes (the "Uniform
Electronic Transactions Act");
• I understand that an electronic signature has the same legal effect and can be enforced in the same way as a written signature; AND
• I intend to electronically sign and submit this form.
Print Name:* Kevin C Martin
Signature *
Submission Date: Autonaticallyfilled in

Initial Review
Is the project accepted r% Yes r- No
for review?*
Is the project located r Yes r No r Unknown
within a NC DCM Area
of Environmental
Concern (AEC)?*
Is this a public -funded r Yes r No
transportation
project?*
D# * 20190788
Version*
Reviewing Office* Raleigh Regional Office - [phone]
Select Reviewer* Stephanie Goss: eads\szgoss
Has payment been r No Payment Needed
received?* r Fee Received
r Need Fee- send electronic notification

SAMPLE AGENT AUTHORIZATION FORM
PROPERTY LEGAL DESCRIPTION:
417 a ,..; =0
Please print:
Property Owner:
i
Fes-- PARCEL ID: l � �� " �� 00
I to 5c\ l (o - 4 -7-57 7
0
L
S -� � 0
Property Owner: f/
The undersigned, registered property owners of the above noted property, do hereby authorize
L _
cG t Yi , of 1 O 1 a f"A V 1 Y\1 oAr- ti
(Contractor /Agent) (Name of consulting firm)
to act on my behalf and take all actions necessary for the processing, issuance and acceptance of
this permit or certification and any and all standard and special conditions attached.
Property Owner's Address (if different than prop��e``rty above): -L
� 1
Ca.
Telephone: Q L �-"""'
YV1 i Ci h.Q G'L sem. i, e—c;; ei—V
We hereby certify the above information submitted in this application is true and accurate to the
best of our knowledge.
Authorized Signature
Date: ' ' ,�- r C(G'!,
Authorized Signature
Date:

NDSID
HOLDINGS
Neuse 01 Riparian Buffer Credits Statement of Availability
June 11, 2019
New Trinity Missionary Baptist Church
Attn: Michael Sims
115 S. Robertson St.
Clayton, NC 27528
RE: Availability of Riparian Buffer Credits for the "New Trinity Missionary Baptist Church" project
Bank Name: WEI - Neuse 01 Nutrient Offset and Buffer Umbrella Bank
Bank Site: Caraway Creek Parcel
Bank Sponsor: Wildlands Holdings II, LLC (wholly owned by Wildlands Engineering, Inc.)
DWR Project #: 2012-0144v2
Permittee: New Trinity Missionary Baptist Church
Riparian Buffer Credits Needed: 0.0036 acres (1563 sq. ft.)
Riparian Buffer Credits Available: 0.41 acres (17,828.13 sq. ft.)
Neuse 03020201 River Basin
Dear Mr. Sims:
Wildlands Holdings II, LLC currently has sufficient riparian Buffer credits from the WEI — Neuse 01
Nutrient Offset & Buffer Bank (Caraway Creek Parcel) to satisfy the riparian buffer mitigation
requirements related to the above-mentioned project. The project is located within the service area
(HUC 03020201) of the Bank.
This letter is simply a statement of availability of credits as of the date written. Although current
inventory is high, the letter is not a guarantee of availability as credits will be sold on a first come, first
serve basis. (note that Wildlands has 5 other banks in the Neuse 01 River Basin and over 10 acres of
buffer credits available at the time of this letter.) An invoice for this transaction will be sent upon your
request and we will formally reserve both the credits and price quoted for a period of 30 days from the
invoice at no cost.
Final transfer of the credits will be made upon receipt of a copy of the 401 Water Quality Certification
Authorization Certificate from the NC Department of Environmental Quality approving the Riparian
Buffer mitigation purchase from the Bank and upon receipt of your payment to Wildlands Holding II,
LLC. We will then issue a credit transfer certificate verifying your credit purchase to the North Carolina
Division of Water Resources and to you for your records
We appreciate the opportunity to assist you with your mitigation requirements. Please contact me at
205-807-0800 or ihazelhoff@wild landseng.com if you have any questions or need any additional
Wildlands Holding II, LLC • Wildlands Engineering, Inc • 312 West Millbrook Road, Suite 225, Raleigh, NC 27609

NDSIG
HOLDINGS
information.
Sincerely,
��X
Ian M. Hazelhoff
Wildlands Engineering, Inc.
Land Acquisition
ihazelhoff@wild landseng.com
0: [phone] ex. 120
M: [phone]
Cc: Kevin Martin, Soil & Environmental Consultants
Wildlands Holding II, LLC • Wildlands Engineering, Inc • 312 West Millbrook Road, Suite 225, Raleigh, NC 27609

Stormwater Calculations
New Trinity Missionary Baptist Church
Clayton, NC
Johnston County
Owner -
New Trinity Missionary Baptist Church
115 S. Robertson St.
Clayton, NC 27528
June 10, 2019
,'� jj ltjfffj�I•
.��Q,�%A CARO��•.•.
SEAL
1.6813
6/ 10/ 19
B. R. KORNEGAY, INC.
LAND SURVEYING • ENGINEERING • PLANNING
300 E. Walnut Street
Goldsboro, North Carolina 27530
[phone] Fax: [phone]
Firm No. F-1054
www.kornegaysep.com

PROJECT: New Trinity Missionar Baptist Church
WORK ORDER: 160283
DATE: March 21, 2019
POST DEVELOPMENT 1 Bioretention pond )
0.80
acres = WATERSHED AREA USED FOR CALCULATIONS, A
445
ft =HYDRAULIC LENGTH OF WATERSHED, L
12.7
ft =HEIGHT OF MOST REMOTE POINT ON WATERSHED, H
3.36
min =TIME OF CONCENTRATION, Toc = ((LA3/H)A0.385)/128
0.00
min =multiply Toc by 2 if overland flow, grassed surface
1.35
min =multiply Toc by 0.4 if overland flow, paved surface
0.00
acres = undisturbed WATERSHED AREA
0.20
= undisturbed RUNOFF COEFFICIENT, C
0.42
acres= managed WATERSHED AREA
0.30
= managed RUNOFF COEFFICIENT, C
0.38
acres = impervious WATERSHED AREA
0.90
= impervious RUNOFF COEFFICIENT, C
0.59
= weighted RUNOFF COEFFICIENT, C
0.80
acres TOTAL AREA,A
1 -YEAR, 24-HOUR STORM:
112 = g
20 = h
5.25 in/hr= INTENSITY, I =g/(h+Toc)
2.5 cfs = PEAK RUNOFF, Qpre = CIA
BIORETENTION POND
RUNOFF VOLUME (First Flush):
0.48 Runoff Coefficient, Rv=0.05+0.9*(la) [la=acres, imp./acres, total]
1.0 in. = Design storm rainfall depth, Rd
1393.9 cf= Required volume of runoff= 3630 x Rd x Rv x Area
SURFACE AREA OF BIORETENTION POND (First Flush)
12.0 in =Depth of storage allowed in bioretention pond
1393.9 sf =Required surface area of bioretention pond (volume/depth)
1400.0 sf =Proposed surface area of Bioretention Pond, A
B. R. KORNEGAY, INC.
LAND SURVEYING - ENGINEERING - PLANNING
300 East Walnut St.
Goldsboro, N.C. 27530
phone: [phone] fax: [phone]

Watershed Model Schematic
1 - bioretention cell
2 - bioretention cell E
Project: New Trinity bioretention cell.gpw
Hydraflow Hydrographs by Intelisolve v9.23
Tuesday, Jun 11, 2019

Hydrograph Return Period Recap
Hydraflow Hydrographs by Intelisolve v9.23
Hyd.
No.
Hydrograph
type
(origin)
Inflow
Hyd(s)
Peak Outflow (cfs)
Hydrograph
description
1 -Yr
2 -Yr
3 -Yr
5 -Yr
10 -Yr
25 -Yr
50 -Yr
100 -Yr
1
2
Rational
Reservoir
-------
1
2.517
0.065
-------
-------
-------
-------
-------
-------
4.064
0.118
-------
-------
-------
-------
5.349
0.162
bioretention cell
bioretention cell
Proj. file: New Trinity bioretention cell.gpw
Tuesday, Jun 11, 2019

Hydrograph Summary Report
Hydraflow Hydrographs by Intelisolve v9.23
Hyd.
No.
Hydrograph
type
(origin)
Peak
flow
(cfs)
Time
interval
(min)
Time to
peak
(min)
Hyd.
volume
(cult)
Inflow
hyd(s)
Maximum
elevation
(ft)
Total
strge used
(cult)
Hydrograph
description
1
Rational
2.517
1
1
151
----
------
------
bioretention cell
2
Reservoir
0.065
1
2
124
1
319.68
147
bioretention cell
New Trinity bioretention cell.gpw
Return Period: 1 Year
Tuesday, Jun 11, 2019

Hydrograph Report
Hydraflow Hydrographs by Intelisolve v9.23
Hyd. No. 1
bioretention cell
Hydrograph type
Storm frequency
Time interval
Drainage area
Intensity
IDF Curve
Q (cfs)
3.00
2.00
1.00
I
Hyd No. 1
= Rational
= 1 yrs
= 1 min
= 0.800 ac
= 5.333 in/hr
= Wayne County_Raleigh.idf
bioretention cell
Hyd. No. 1 -- 1 Year
1
Peak discharge
Time to peak
Hyd. volume
Runoff coeff.
Tc by User
Asc/Rec limb fact
4
Tuesday, Jun 11, 2019
= 2.517 cfs
= 1 min
= 151 cuft
= 0.59
= 1.00 min
= 1/1
Q (cfs)
3.00
2.00
1.00
%- 0.00
2
Time (min)

Hydrograph
Report
5
Hydraflow Hydrographs by Intelisolve v9.23
Tuesday, Jun 11, 2019
Hyd. No. 2
bioretention cell
Hydrograph type
= Reservoir
Peak discharge
= 0.065 cfs
Storm frequency
= 1 yrs
Time to peak
= 2 min
Time interval
= 1 min
Hyd. volume
= 124 cuft
Inflow hyd. No.
= 1 - bioretention cell
Max. Elevation
= 319.68 ft
Reservoir name
= bioretention cell
Max. Storage
= 147 cuft
Storage Indication method used. Exfiltration extracted from Outflow
Q (cfs)
3.00
2.00
1.00
0.00
0 20
— Hyd No. 2
bioretention cell
Hyd. No. 2 -- 1 Year
40 60 80 100 120 140 160 180 200
Hyd No. 1 Total storage used = 147 cuft
Q (cfs)
3.00
2.00
1.00
0.00
220
Time (min)

Pond Report s
Hydraflow Hydrographs by Intelisolve v9.23 Tuesday, Jun 11, 2019
Pond No. 1 - bioretention cell
Pond Data
Trapezoid - Bottom L x W = 40.0 x 35.0 ft, Side slope = 0.00:1, Bottom elev. = 319.50 ft, Depth = 7.85 ft, Voids = 60.00%
Stage / Storage Table
Stage (ft) Elevation (ft) Contour area (sgft) Incr. Storage (cult) Total storage (cult)
0.00
319.50
1,400
0
0
0.79
320.29
1,400
659
659
1.57
321.07
1,400
659
1,319
2.36
321.86
1,400
659
1,978
3.14
322.64
1,400
659
2,638
3.93
323.43
1,400
659
3,297
4.71
324.21
1,400
659
3,956
5.49
325.00
1,400
659
4,616
6.28
325.78
1,400
659
5,275
7.06
326.57
1,400
659
5,935
7.85
327.35
1,400
659
6,594
Culvert / Orifice Structures
Weir Structures
[A]
[B] [C]
[PrfRsr]
[A]
[B]
[C]
[D]
Rise (in) = 4.00
15.00 0.00
0.00
Crest Len (ft)
= 0.00
0.00
0.00
0.00
Span (in) = 4.00
15.00 0.00
0.00
Crest EI. (ft)
= 0.00
0.00
0.00
0.00
No. Barrels = 1
1 0
0
Weir Coeff.
= 3.33
3.33
3.33
3.33
Invert EI. (ft) = 319.50
323.67 0.00
0.00
Weir Type
= ---
---
---
---
Length (ft) = 7.00
5.00 0.00
0.00
Multi -Stage
= No
No
No
No
Slope (%) = 1.00
1.00 0.00
n/a
N -Value = .010
.013 .013
n/a
Orifice Coeff. = 0.60
0.60 0.60
0.60
Exfil.(in/hr)
= 1.000 (by
Wet area)
Multi -Stage = n/a
No No
No
TW Elev. (ft)
= 0.00
Note: Culvert/Orifice outflows are analyzed under inlet (ic) and outlet (oc) control. Weir risers checked for orifice conditions
(ic)
and submergence (s).
Stage / Storage / Discharge
Table
Stage Storage Elevation
Civ A
Civ B Civ C
PrfRsr Wr A
Wr B
Wr C
Wr D
Exfil
User
Total
ft cult ft
cfs
cfs cfs
cfs cfs
cfs
cfs
cfs
cfs
cfs
cfs
0.00 0 319.50
0.00
0.00 ---
--- ---
---
---
---
0.000
---
0.000
0.79 659 320.29
0.33 is
0.00 ---
--- ---
---
---
---
0.035
---
0.366
1.57 1,319 321.07
0.50 is
0.00 ---
--- ---
---
---
---
0.038
---
0.536
2.36 1,978 321.86
0.62 is
0.00 ---
--- ---
---
---
---
0.041
---
0.662
3.14 2,638 322.64
0.72 is
0.00 ---
--- ---
---
---
---
0.043
---
0.768
3.93 3,297 323.43
0.81 is
0.00 ---
--- ---
---
---
---
0.046
---
0.861
4.71 3,956 324.21
0.90 is
0.71 oc ---
--- ---
---
---
---
0.049
---
1.659
5.49 4,616 325.00
0.97 is
2.74 oc ---
--- ---
---
---
---
0.051
---
3.760
6.28 5,275 325.78
1.04 is
7.20 is ---
--- ---
---
---
---
0.054
---
8.293
7.06 5,935 326.57
1.10 is
8.90 is ---
--- ---
---
---
---
0.057
---
10.06
7.85 6,594 327.35
1.16 is
10.33 is ---
--- ---
---
---
---
0.060
---
11.55

Hydrograph Summary Report
Hydraflow Hydrographs by Intelisolve v9.23
Hyd.
No.
Hydrograph
type
(origin)
Peak
flow
(cfs)
Time
interval
(min)
Time to
peak
(min)
Hyd.
volume
(cult)
Inflow
hyd(s)
Maximum
elevation
(ft)
Total
strge used
(cult)
Hydrograph
description
1
Rational
4.064
1
1
244
----
------
------
bioretention cell
2
Reservoir
0.118
1
2
208
1
319.79
237
bioretention cell
New Trinity bioretention cell.gpw
Return Period: 10 Year
Tuesday, Jun 11, 2019

Hydrograph Report
Hydraflow Hydrographs by Intelisolve v9.23
Hyd. No. 1
bioretention cell
Hydrograph type
= Rational
Storm frequency
= 10 yrs
Time interval
= 1 min
Drainage area
= 0.800 ac
Intensity
= 8.610 in/hr
IDF Curve
= Wayne County_Raleigh.idf
Q (cfs)
5.00
4.00
3.00
2.00
1.00
0.00 �
0
Hyd No. 1
bioretention cell
Hyd. No. 1 -- 10 Year
1
Peak discharge
Time to peak
Hyd. volume
Runoff coeff.
Tc by User
Asc/Rec limb fact
0
Tuesday, Jun 11, 2019
= 4.064 cfs
= 1 min
= 244 cuft
= 0.59
= 1.00 min
= 1/1
Q (cfs)
5.00
4.00
3.00
2.00
1.00
%- 0.00
2
Time (min)

9
Hydrograph Report
Hydraflow Hydrographs by Intelisolve v9.23
Tuesday, Jun 11, 2019
Hyd. No. 2
bioretention cell
Hydrograph type
= Reservoir
Peak discharge
= 0.118 cfs
Storm frequency
= 10 yrs
Time to peak
= 2 min
Time interval
= 1 min
Hyd. volume
= 208 cuft
Inflow hyd. No.
= 1 - bioretention cell
Max. Elevation
= 319.79 ft
Reservoir name
= bioretention cell
Max. Storage
= 237 cuft
Storage Indication method used. Exfiltration extracted from Outflow.
bioretention cell
Q (cfs) Hyd. No. 2 -- 10 Year Q (cfs)
5.00 5.00
4.00 4.00
3.00 3.00
2.00 2.00
1.00 1.00
0.00 0.00
0 20 40 60 80 100 120 140 160 180 200 220
Time (min)
Hyd No. 2 Hyd No. 1 Total storage used = 237 cult

Hydraflow Rainfall Report
Hydraflow Hydrographs by Intelisolve v9.23
Return
Period
Intensity -Duration -Frequency Equation Coefficients (FHA)
(Yrs)
B
D
E
(N/A)
1
112.0004
20.0000
1.0000
--------
2
0.0000
0.0000
0.0000
--------
3
0.0000
0.0000
0.0000
--------
5
0.0000
0.0000
0.0000
--------
10
105.7041
16.8000
0.8710
--------
25
118.9252
17.6000
0.8582
--------
50
0.0000
0.0000
0.0000
--------
100
157.1769
19.6000
0.8692
--------
File name: Wayne County_Raleigh.idf
Intensity = B / (Tc + D)^E
10
Tuesday, Jun 11, 2019
Return
Period
Intensity Values (in/hr)
(Yrs)
5 min
10
15
20
25
30
35
40
45
50
55
60
1
4.48
3.73
3.20
2.80
2.49
2.24
2.04
1.87
1.72
1.60
1.49
1.40
2
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
3
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
5
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
10
7.22
6.03
5.19
4.57
4.09
3.71
3.40
3.13
2.91
2.72
2.56
2.41
25
8.19
6.90
5.98
5.29
4.75
4.32
3.97
3.67
3.41
3.20
3.01
2.84
50
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100
9.71
8.27
7.22
6.42
5.79
5.28
4.86
4.50
4.20
3.93
3.70
3.50
Tc = time in minutes. Values may exceed 60.
Precip. file name: Sample.pcp
Rainfall Precipitation Table (in)
Storm
Distribution
1 -yr
2 -yr
3 -yr
5 -yr
10 -yr
25 -yr
50 -yr
100 -yr
SCS 24-hour
0.00
2.20
0.00
3.30
4.25
5.77
6.80
7.95
SCS 6 -Hr
0.00
1.80
0.00
0.00
2.60
0.00
0.00
4.00
Huff -1st
0.00
1.55
0.00
2.75
4.00
5.38
6.50
8.00
Huff -2nd
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
Huff -3rd
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
Huff -4th
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
Huff -Indy
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
Custom
3.33
1.75
0.00
2.80
3.90
5.25
6.00
7.10

CoB
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* * * DISCLAIMER
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Johnston County GIS
June 10, 2019

F-1EXISTING PARKING/DRIVEWAY INSIDE
BUFFER
EXISTING BUILDING INSIDE BUFFER ®
BUFFER
40 020
IMPACT
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1 inch
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S
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— — — — —
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T.O.C.227.88 LANDSCAPE
INV. -325.09 O
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EX. CATCH BASIN EX. CATCH BASIN
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License Number: F-1054
= = =
16813 —
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DATE:
WORK ORDER:
300 East Walnut Street
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6-7-2019
TOWN OF CLAYTON
160283
Goldsboro, N.C. 27530
919 735-5886 Fax: [phone]
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SCALE:
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160283

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= 40 ft.
S
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— — — — —
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T.O.C.227.88
INV.-325.09
LANDSCAPE
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6-7-2019
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JOHNSTON COUNTY, N.C.
SCALE:
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160283

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