SW3140603_CURRENT PERMIT_20140904

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO. SW
DOC TYPE CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

OEM
North Carolina Department of Environment and Natural Resources
Pat McCrory John E. Skvarla, III
Governor Secretary
September 4, 2014 �
Mr. Dennis
Own/developerr ^N1StQtl IUA D
e SCGOUD�EJ
Griffin Land Holdings LLC & Liquid Development LLC
231 Post Office Dr., Suite Biz SEP zoi4
Indian Trail, North Carolina 28079 wt� � n�yBUPGES n
Subject: Stormwater Permit No. SW3140603 M�
The Conservancy at Washaw Creck in Union County
Dear Mr. Moser:
The Division of Energy, Mineral, and Land Resources (DELMR), received a complete Stormwater
Management Permit Application for the subject project on June 24, 2014. Staff review of the plans and
specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set
forth in Title 15A NCAC 2H.1000 and Session Law 2006-246. We are forwarding Permit No. SW3140603,
dated September 3, 2014, for the construction, operation and maintenance of the subject project and the two
wet detention basins. This permit shall be effective from the date of issuance until September 2, 2022 and
shall be subject to the conditions and limitations as specified therein, and does not supersede any other
agency permit that may be required,
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to
request an adjudicatory hearing by filing a written petition with the Office of Administrative Hearings
(OAH). The written petition must conform to Chapter 150B of the North Carolina General Statutes. Per
NCGS 143-215(e) the petition must be filed with the OAH within thirty (30) clays of receipt of this permit.
You should contact the OAH with all questions regarding the filing fee (if a tiling fee is required) and/or the
details of the filing process at 6714 Mail Service Center, Raleigh, NC 27699-6714, or via telephone at 919-
431-3000, or visit their website at www.NCOAH.com. Unless such demands are made this permit shall be
final and binding.
This project will be kept oil file at the Mooresville Regional Office. If you have any questions, or need
additional information concerning this matter, please contact Mike Randall at [phone]; or
milce.randa I I@ncden r.aov.
Since)-71 zu,
for Tracy E. Davis, PC, CPM, Director
cc: SW3140603 Pile, Mooresville Regional Office
ec: John H. Ross, P.E., Eagle Engineering
Division of Energy, Mineral, and Land Resources
Energy Section • Geological Survey Section • Land Quality Section
1612 Mail Service Center, Raleigh, North Carolina 27699.1612.919-707-9200 / FAX: [phone]
512 North Salisbury Street, Raleigh, North Carolina 27604 • Internet: http://portal,ncdenr.org/web/Ir/
An Equal Opportunity1 Affirmative Action Employer- 50% Recycled 110% Post Consumer Paper

State Stormwater Permit
Permit No. SW3140603
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
STATE STORMWATER MANAGEMENT PERMIT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of
North Carolina as amended, and other applicable Laws, Rules, and RegulationsIUN OF LAND RESOURCES
PERMISSION IS HEREBY GRANTED TO AND QUALITY SECTION-rr{\(Cjl
Griffin Land Holdings LLC & Liquid Development LLC SEP 2 6 2014
The Conservancy at Waxhaw Creek I.,........ ..wvmuNMENT
AND NATURAL RESOURCES
Steel Road, Union County
FOR THE
construction, operation and maintenance of two wet detention basins in compliance
with the provisions of Session Law 2006-246 and 15A NCAC 2H .1000 (hereafter
referred to as the "stormwater rules') and the approved stormwater management plans
and specifications and other supporting data as attached and on file with and approved
by the State and considered a part of this permit.
This permit shall be effective from the date of issuance until September 2, 2022, and
shall be subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. The two wet detention basins are approved for the management of stormwater
runoff as described in the application documents and as shown on the approved
plans.
3. All stormwater collection and treatment systems must be Iodated in either
dedicated common areas or recorded easements. The final plats for the project
will be recorded showing all such required easements, in accordance with the
approved plans.
4. The runoff from all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system.
The built -upon areas associated with this project shall be located at least 30 feet
landward of all perennial and intermittent surface waters.
Each builder and/or property owner must have plans for individual lots approved,
knowing and understanding the BUA limit and the prohibition against excessive
piping, how to size the driveway pipe, knowing where the buffer is on that lot,
knowing where the drainage easements are and the expectation to keep existing
swales open, and ensuring roof gutters and impervious surfaces are
disconnected to the maximum extent technically feasible.
Page 1 of 4

State Stormwater Permit
Permit No. SW3140603
Il. SCHEDULE OF COMPLIANCE
During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
2. The permittee shall at all time provide the operation and maintenance necessary
to assure the two permitted wet detention basins functions at optimum efficiency.
The approved Operation and Maintenance Plan must be followed in its entirety
and maintenance must occur at the scheduled intervals including, but not limited
to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowin.9 and re -vegetation of slopes and the filter strip.
d. Immediate repair of eroded areas,
e. Maintenance of all slopes in accordance with approved plans.
f. Debris removal and unclogging of all drainage structures, level spreader,
filter media, planting media, underdrains, catch basins and piping.
g. Access to the cell and outlet structure must be available at all times.
3. Records of maintenance activities must be kept for each permitted BMP. The
reports will indicate the date, activity, name of person performing the work and
what actions were taken.
4. The permittee shall submit an annual summary report of the maintenance and
inspection records for each of the two wet detention basins. The report shall
summarize the inspection dates, results of the inspections, and the maintenance
work performed at each inspection.
The two wet detention basins shall be constructed in accordance with the
approved plans and specifications, the conditions of this permit, and with other
supporting data.
6. Upon completion of construction, prior to issuance of a Certificate of Occupancy,
and prior to operation of this permitted facility, a certification must be received
from an appropriate designer for the two wet detention basins certifying that the
permitted facility has been installed in accordance with this permit, the approved
plans and specifications, and other supporting documentation. Any deviations
from the approved plans and specifications must be noted on the Certification. A
modification may be required for those deviations.
7. If the stormwater system was used as an Erosion Control device, it must be
restored to design condition prior to operation as a stormwater treatment device,
and prior to occupancy of the facility.
B. The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for any,
modification to the approved plans, including, but not limited to, those listed below:
a. Any revision to any item shown on the approved plans, including the
stormwater management measures, built -upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
e. Further subdivision, acquisition, lease or sale of all or part of the project
area. The project area is defined as all property owned by the permittee,
for which Sedimentation and Erosion Control Plan approval was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
Page 2 of 4

State Stormwater Permit
Permit No. SW3140603
9. A copy of the approved plans and specifications shall be maintained on file by
the Permittee for a minimum of eight years from the date of the completion of
construction.
10. The Director may notify the permittee when the permitted site does not meet one
or more of the minimum requirements of the permit. Within the time frame
specified in the notice, the permittee shall submit a written time schedule to the
Director for modifying the site to meet minimum requirements. The permittee
shall provide copies of revised plans and certification in writing to the Director
that the changes have been made.
III. GENERAL CONDITIONS
This permit is not transferable except after notice to and approval by the Director.
In the event of a change of ownership, or a name change, the permittee must
submit a completed Name/Ownership Change form signed by both parties, to the
State, accompanied by the supporting documentation. The approval of this
request will be considered on its merits and may or may not be approved.
2. The permittee is responsible for compliance with all permit conditions until such
time as the Division approves a request to transfer the permit,
3. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the State, in accordance with
North Carolina General Statute 143-215.6A to 143-215.6C.
4. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances, which may be imposed by
other government agencies (local, state, and federal) having jurisdiction.
5. In the event that the facilities fail to perform satisfactorily, including the creation
of nuisance conditions, the Permittee shall take immediatecorrective action,
including those as may be required by this Division, such as the construction of
additional or replacement stormwater management systems.
6. The permittee grants DENR Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management facility.
7. The permit issued shall continue in force and effect until revoked or terminated.
The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and re -issuance or
termination does not stay any permit condition.
8. Unless specified elsewhere, permanent seeding requirements for the stormwater
control must follow the guidelines established in the North Carolina Erosion and
Sediment Control Planning and Design Manual.
9. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
10. The issuance of this permit does not prohibit the Director from reopening and
modifying the permit, revoking and reissuing the permit, or terminating the permit
as allowed by the laws, rules and regulations contained in Session Law 2006-
246, Title 15A NCAC 2H.1000, and NCGS 143-215.1 et.al.
Page 3 of 4

State Stormwater Permit
Permit No. SW3140603
11. The permittee shall notify the Division in writing of any name, ownership or
mailing address changes at least 30 days prior to making such changes.
12. The permittee shall submit a renewal request with all required forms and
documentation at least 180 days prior to the expiration date of this permit.
Permit issued this the 4'h day of September, 2014.
i is"y �-. vavi�, r.�„ k.nw
rector Division of Energy, Mineral, and Land Resources
Page 4 of 4

State Stormwater Permit
Permit No. SW3140603
Griffin Land Holdings LLC & Liquid Development LLC
The Conservancy at Waxhaw Creek
Steel Road, Union County
Designer's Certification
I, , as a duly registered in the
State of North Carolina, having been authorized to observe (periodically/ weekly/
full time) the construction of the project,
(Project Name)
for (Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
cc: NCDENR-DEMLR Regional Office
Page 1 of 1

Date Received I Fee Paid I Permit Number
,tf- zOiy I _50s. l f/7 1)�
Applicable Rules: LJ Coastal SW —1995 ❑ Coastal SW — 2008 G]-Ph II - Post Construction
(select all that apply) ❑ Non -Coastal SW- HQW/ORW Waters ❑ Universal Stormwater Management Plan
Z. 6ther WO Memt Plan: 1,4 "14" Cl={= 9 u NEs
State of North Carolina
Department of Environment and Natural Resources
Division of Energy, Mineral and Land Resources
GV�Gc�
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Project Name (subdivision, facility, or establishment name -should be consistent with prdject?n �ee on,planstS
specifications, letters, operation and maintenance agreements, etc.):
2. Location of Project (street address):
County:Union County Zip:28079
3. Directions to project (from nearest major intersection):
At the Intersection of Lancaster Hwy (SR 200) and Steele Rd (SR 1170) head NW along Steele Rd for
approximately 1 mile. Property is located on the Northern side of Steele Road
4. Latitude:34° 51' 25.344" N Longitude:80° 43' 50.603" W of the main entrance to the project.
IL PERMIT INFORMATION:
a. Specify whether project is (check one): ®New ❑Modification ❑ Renewal w/ Modificationt
*Renewals with modifications also requires SWU-102 — Renewal Application Form
b.If this application is being submitted as the result of a modification to an existing permit, list the existing
permit number , its issue date (if known) . and the status of
construction: ❑Not Started ❑Partially Completed* ❑ Completed* *provide a designer's certification
2. Specify the type of project (check one):
®Low Density ❑High Density ❑Drains to an Offsite Stormwater System ❑Other
3. If this application is being submitted as the result of a previously returned application or a letter from
DEMLR requesting a state stormwater management permit application, list the stormwater project number,
if assigned, and the previous name of the project, if different than currently
proposed,
4. a. Additional Project Requirements (check applicable blanks; information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748):
❑LAMA Major
❑NPDES Industrial Stormwater
®Sedimentation/Erosion Control: 13.00 ac of Disturbed Area
❑404/401 Permit: Proposed Impacts
b.If any of these permits have already been acquired please provide the Project Name, Project/Permit Number,
issue date and the type of each permit:
5. Is the project located within 5 miles of a public airport? ®No ❑Yes
If yes, see S.L. 2012-200, Part VI: http://12ortal.ncdenr.org/web/Ir/rules-and-regulations
Form SWU-101 Version Oct. 31, 2013 Page 1 of 6

III. CONTACT INFORMATION
1. a. Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee,
designated government official, individual, etc. who owns the project):
Applicant/Organization:Griffin Land Holdings LLC & Liquid Development LLC
Signing Official & Title:Mr. Dennis Moser; Owner/Developer
b. Contact information for person listed in item la above:
Street Address:231 Post Office Dr. Suite B8
City:Indian Trail
Mailing Address (if applicable):
City:
Phone: (704 ) 882-1700
Email:[e-mail]
State:NC Zip:28079
Fax: (704 ) 882-2220
c. Please check the appropriate box. The applicant listed above is:
® The property owner (Skip to Contact Information, item 3a)
❑ Lessee* (Attach a copy of the lease agreement and complete Contact Information, item 2a and 2b below)
❑ Purchaser* (Attach a copy of the pending sales agreement and complete Contact Information, item 2a and
2b below)
❑ Developer* (Complete Contact Information, item 2a and 2b below.)
2. a. Print Property Owner's name and title below, if you are the lessee, purchaser or developer. (This is the
person who owns the property that the project is located on):
Property Owner/Organization:Griffin Land Holdings LLC & Liquid Development LLC
Signing Official & Title:Mr. Dennis Moser; Owner/Developer
b. Contact information for person listed in item 2a above:
Street Address:231 Post Office Dr. Suite B8
City:Indian Trail State:NC Zip:28079
Mailing Address (if
Phone: (704 ) 882-1700
Email:[e-mail]
State: Zip:
Fax: (704 ) 882-2220
3. a. (Optional) Print the name and title of another contact such as the project's construction supervisor or other
person who can answer questions about the project:
Other Contact Person/Organization:
Signing Official & Title:
b. Contact information for person listed in item 3a above:
Mailing Address:
City: State: Zip:
Phone: f ) Fax: ( )
4. Local jurisdiction for building permits:
Point of Contact:Brian Matthews Phone #: (704 ) 283-3565
Form SWU-101 Version Oct. 31, 2013 Page 2 of

IV
PROJECT INFORMATION
2.a
In the space provided below, briefly summarize how the stormwater runoff will be treated.
Storm water runoff on the site will be conveyed by roadside and diversion ditches to wet detention ponds.
The wet detention ponds will treat the difference in runoff for the I year 24 hour storms from predevelopment
and post development areas.
If claiming vested rights, identify the supporting documents provided and
❑ Approval of a Site Specific Development Plan or PUDApproval Date: _
❑ Valid Building Permit Issued Date:
❑ Other: Date:
the date they were approved:
b.If claiming vested rights, identify the regulation(s) the project has been designed in accordance with:
❑ Coastal SW — 1995 ❑ Ph II — Post Construction
3. Stormwater runoff from this project drains to the Catawba River basin.
4. Total Property Area: 66.49 acres
5. Total Coastal Wetlands Area: 0 acres
6. Total Surface Water Area:0 acres
7. Total Property Area (4) —Total Coastal Wetlands Area (5) — Total Surface Water Area (6)=Total Project Area':
66.49 acres
Totalprojectareashallbecaladaiedtoercludethefollowing: the normalpoolofimpounded,structures,the area
between the banks ofstream.s and rivers, the area below the Normal High Wcter (NHW) line or Mean High Water
(MHW) line, and coastal wetlands landwardfrom theNHW (or MHW) line. Theresu/tant project area is used to
calculate overall percent built upon area (BUA). Non -coastal wetlands landward ofdte NHW (or MHW) line map, be
included in the total prajeet area
8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 10.55 %
9. How many drainage areas does the project have?2 (l,or high density, count l for each proposed engineered
stormwater BMP. For low density and other projects, use 1 for the whole property area)
10. Complete the following information for each drainage area identified in Project Information item 9. If there
are more than four drainage areas in the project, attach an additional sheet with the information for each area
provided in the same format as below.
Basin Information
Drainage Area I
Drainage Area 2
Drainage Area _
Drainage Area _
Receiving Stream Name
Waxhaw Creek
Waxhaw Creek
Stream Class *
C
C
Stream Index Number*
11-139
II-139
Total Drainage Area (sf)
1,911,678
547,985
On -site Drainage Area (sl)
1,805,534
540,720
Off -site Drainage Area (sf)
1 106,144
7,265
Proposed Impervious Area** (so
186,871
72,580
% Impervious Area** (total)
8.12
13.24
Impervious" Surface Area
Drainage Area 1
Drainage Area 2
Drainage Area
Drainage Area _
On -site Buildings/ Lots (so
130,500
40,500
On -site Streets (sf)
36,205
32,080
On -site Parking (sf)
0
0
On -site Sidewalks (st)
0
0
Other on -site (sf)
0
0
Future (sf)
1 0
0
Off -site (sf)
20,166
0
ExistingBUA***(sf)
0
0
Total (sf:
186,871
72,580
* Stream Class and Index Number can be determined at: http.//portal.ncdcnr.orghvchlii,q /csu/clrE.vircations
** Impervious area is defined as the built upon area including, but not limited ia, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
***Report only that amount of existing BUA that will remain after development. Do not report any existing BUA that is
to be removed and which will be replaced by new BUA.
Form SWU-101 Version Oct. 31, 2013 Page 3 of 6

11. How was the off -site impervious area listed above determined? Provide documentation. GIS and actual
survey data was measured within AutoCAD
Projects in Union County: Contact DEMLR Central Office staff to check if the project is located within a Threatened &
Endangered Species watershed that may be subject to more stringent stormwater requirements as per 15A NCAC 02B .0600.
V. SUPPLEMENT AND O&M FORMS
The applicable state stormwater management permit supplement and operation and maintenance (O&M) forms
must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded
fromhttl2://12ortal.ncdenr.org/web/wq/ws/­su/bml2-manual.
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Energy, Mineral and
Land Resources (DEMLR). A complete package includes all of the items listed below. A detailed application
instruction sheet and BMP checklists are available from
http://12ortal.ncdenr.org/web/wq/ws/su/statesw/forms does. The complete application package should be
submitted to the appropriate DEMLR Office. (The appropriate office may be found by locating project on the
interactive online map at http://portal.ncdenr.org/web/wq/ws/su/mans.)
Please indicate that the following required information have been provided by initialing in the space provided
for each item. All original documents MUST be signed and initialed in blue ink. Download the latest versions
for each submitted application package from http://portalmcdennorg/web/wq/ws/su/statesw/forms does.
1. Original and one copy of the Stormwater Management Permit Application Form.
2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants N
Form. (l required pl per Part VII below)
3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M
agreement(s) for each BMP. 0114?,La
4. Permit application processing fee of $505 payable to NCDENR. (For an Express review, refer to
hug://www.envhelp.org/12ages/onestol2exl2ress.html for information on the Express program
and the associated fees. Contact the appropriate regional office Express Permit Coordinator for
additional information and to schedule the required application meeting.)
5. A detailed narrative (one to two pages) describing the stormwater treatment/management for
the project. This is required in addition to the brief summary provided in the Project
Information, item 1.
6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the
receiving stream drains to class SA waters within 1k mile of the site boundary, include the'h
mile radius on the map.
7. Sealed, signed and dated calculations (one copy).
8. Two sets of plans folded to 8.5" x 14" (sealed, signed, & dated), including:
a. Development/Project name.
b. Engineer and firm.
c. Location map with named streets and NCSR numbers.
d. Legend.
e. North arrow.
I. Scale.
g. Revision number and dates.
h. Identify all surface waters on the plans by delineating the normal pool elevation of
impounded structures, the banks of streams and rivers, the MHW or NHW line of tidal
waters, and any coastal wetlands landward of the MHW or NHW lines.
• Delineate the vegetated buffer landward from the normal pool elevation of impounded
structures, the banks of streams or rivers, and the MHW (or NHW) of tidal waters.
i. Dimensioned property/project boundary with bearings & distances.
j. Site Layout with all BUA identified and dimensioned.
k. Existing contours, proposed contours, spot elevations, finished floor elevations.
1. Details of roads, drainage features, collection systems, and stormwater control measures.
in. Wetlands delineated, or a note on the plans that none exist. (Must be delineated by a
qualified person. Provide documentation of qualifications and identify the person who
made the determination on the plans.
n. Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations.
o. Drainage areas delineated (included in the main set of plans, not as a separate document).
Form SWU-101 Version Oct. 31, 2013 Page 4 of 6

p. Vegetated buffers (where required).
9. Copy of any applicable soils report with the associated SHWT elevations (Please identify
elevations in addition to depths) as well as a map of the boring locations with the existing
elevations and boring logs. Include an 8.5"xll" copy of the NRCS County Soils map with the
project area clearly delineated. For projects with infiltration BMPs, the report should also
include the soil type, expected infiltration rate, and the method of determining the infiltration rate.
(Infiltration Devices submitted to WiRO: Schedule a site visit for DEMLR to verify the SHWT prior
to submittal, [phone].)
10. A copy of the most current property deed. Deed book: 3661 Page No: 0166
11. For corporations and Lim ted liability corporations (LLC): Provide documentation from the NC
Secretary of State or other official documentation, which supports the titles and positions held
by the persons listed in Contact Information, item la, 2a, and/or 3a per 15A NCAC 21-1.1003(e). LIZ
The corporation or LLC must be listed as an active corporation in good standing with the NC
Secretary of State, otherwise the application will be returned.
ht!12://www.secretary.state.nc.us/Corl2orations/CSearch.asl2x
VII. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
For all subdivisions, outparcels, and future development, the appropriate property restrictions and protective
covenants are required to be recorded prior to the sale of any lot. If lot sizes vary significantly or the proposed
BUA allocations vary, a table listing each lot number, lot size, and the allowable built -upon area must be provided
as an attachment to the completed and notarized deed restriction form. The appropriate deed restrictions and
protective covenants forms can be downloaded from htro://12ortal.ncdenr.org/web/]r/state-stormwater-
forms dots. Download the latest versions for each submittal.
In the instances where the applicant is different than the property owner, it is the responsibility of the property
owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring
that the deed restrictions are recorded.
By the notarized signature(s) below, the permit holder(s) certify that the recorded property restrictions and
protective covenants for this project, if required, shall include all the items required in the permit and listed
on the forms available on the website, that the covenants will be binding on all parties and persons claiming
under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the NC DEMLR, and that they will be recorded prior to the sale of any lot.
VIII. CONSULTANT INFORMATION AND AUTHORIZATION
Applicant: Complete this section if you wish to designate authority to another individual and/or firm (such as a
consulting engineer and/or firm) so that they may provide information on your behalf for this project (such as
addressing requests for additional information).
Consulting Engineer:lohn H. Ross, P.E.
Consulting Firm: Eagle Engineering Inc.
Mailing Address:2013A Van Buren Ave.
City:Indian Trail ¢ 5 b State:NC Zip:28079
Phone [phone] Fax: f866 ) 775-0329
Jross
Email:ijmurohy eagleonline.net
IX. PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filled out, complete this
section)
I, (print or type name of person listed in Contact Information, item 2a) �� n t 5 S P—( certify that I
own the property identified in this eermit application, and thus give permission to (print or type name of person
listed in Contact Information, item 1 _4_, I5 ,
�. ht�uSr�! with (print or type name of organization listed in
Contact Information, item la) to develop the project as currently proposed. A copy of
the lease agreement or pending property sales contract has been provided with the submittal, which indicates the
party responsible for the operation and maintenance of the stormwater system.
Form SWU-101 Version Oct. 31, 2013 Page 5 of 6

As the legal property owner I acknowledge, understand, and agree by my signature below, that if my designated
agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their
lease agreement, or pending sale, responsibility for compliance with the DEMLR Stormwater permit reverts back
to me, the property owner. As the property owner, it is my responsibility to notify DEMLR immediately and
submit a completed Name/Ownership Change Form within 30 days; otherwise I will be operating a stormwater
treatment facility without a valid permit. I understand that the operation of a stormwater treatment facility
without a valid permit is a violation of NC General Statue 143-215.1 and may result in appropriate enforcement
action including theptssment of civil penalties of up to $25,000 per day, pursuant to NCGS 143-215.6.
Date: to , 12-- /,-
I, <1Ae-rul E H • Li i-He- . a Notary Public for the State of County of
Vl Y1 t do hereby certify that le r-'n i 5 W- M o Sew personally appeared
before me this %a day of 20 LL an owledge the due ex ution of the application for a
stormwater permit. Witness my hand and official seal, Gt l� t ll
RAENAE H. LITTLE
NOTARY PUBLIC
Stanly County, North Carolina
My Commission Expires 41'16120'17
X. APPLICANT'S CERTIFICATION
SEAL
My commission expires 4, 11, - 17
I, (print or type name of person listed in Contact Information, item 1a) ! Je-n rn l5 W- Y ee
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants be recorded, and that the proposed project complies with the requirements of the
applicable stormwa e under 15A NCAC 2H .1000 and any other applicable state storm/ /
water requirements.
Signature: Date: (e - / 2 ' �"
V -We. a Notary Public for the State of nj C — County of
y.( do hereby certify that ntS W - I Y��G� personally appeared
before me this 21ay of t.Lru- Zo 1'� ,and owledge the due ex ution of the application for a
stormwater permit. Witness my hand and official seal, l/
RAENAE H. LITTLE
NOTARY PUBLIC
Stanly County. North Carolina
My Commission Expires 4/162017.
SEAL
My commission expires 4- "'1 - 17
Form SWU-101 Version Oct. 31, 2013 Page 6 of 6

The Conservancy at Waxhaw Creek 4673-C-NC
Stormwater Management Report June 12, 2014
Project Address and Summary
The project is located along the Northside of Steele Road with entrances approximately 0.7 and 1.4 miles from the
intersection of Highway 200 (Lancaster Hwy) and Steele Road. The proposed development will include the grading
for stormwater management ponds and the roads to make up the neighborhood.
Site improvements will include grading for roads, ditch sections, and two BMPs that will both treat and detain water.
The remaining area will be split into 39 lots zoned as R40. Design and construction standards will be to the
standards provided by Union County.
A mentioned above, the site plan includes 2 stormwater BMPs located new the topographically low points of the
site. The development of the site must comply with all of the Union County Development Standards and therefore
will provide stormwater quality and provide peak controls for stormwater runoff. Wet Ponds were chosen as the
BMPs for the site. These measures were designed per the NCDENR Stormwater 13MP Manual.
Runoff calculations were performed following the procedures outlined in the NCDBNR Stortnwater BMP Manual
and by the SCS method.
The receiving drainage system for this site is the Waxhaw Creek. The site drains from the South to the Northwest
and directly into the Waxhaw Creek. Soils in the area consist of:
CeB2: Cecil gravelly sandy clay loam, 2 to 8 percent slopes, moderately eroded
CeC2: Cecil gravelly sandy clay loam, 8 to 15 percent slopes, moderately eroded
Hell: Helena fine sandy loam, 2 to 8 percent slopes
These soils are predominantly labeled as hydrologic soil group (HSG) "B", "B", and "D" respectively. USDA
NRCS soils map and supporting information can be found in the Appendix.
Water Quality Volume Control and Peak Flow Control
Water Quality Volume and Release Calculations were performed as outlined in the BMP Manual and are included in
Appendix A.
Predeveloped Conditions
The site generally consists of woods and some graded pathways. The site currently slopes from the south side of the
property north to either a tributary of Waxhaw Creek or directly into Waxhaw Creek. The site area is approximately
64.69 acres.
The predevelopment drainage from the site was delineated as indicated on the Pre Development and Post
Development Drainage Area Maps included in the Appendix. The time of concentration for each is outlined in the
drainage calculations, and were calculated with the TR-55 method.
The Curve Nnumbers (CN) for each basin were computed as Woods (Woods are grazed but not burned, and
some forest litter covers the soil). Drainage area (DA) I was calculated to have a CN of 63 and DA 2 was
calculated to have a CN of 60. NRCS soil data and Table 3-5 "Runoff curve numbers in urban areas for the SCS
method (SCS, 1986)" was used to calculate the run off values.

Permit Number:
(to he provided by DWQ)
Drainage Area Number:
Wet Detention Basin Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP. OF too RESOUP.fES
nIVIS'O D l7UP.Lm SE-r-11 "�
The wet detention basin system is defined as the wet detention basin,
pretreatment including forebays and the vegetated filter if one is provided.) 2014
5tr
This system (check one): t)tr'N�LRES�URCES
❑ does ® does not incorporate a vegetated filter at the outlet.
This system (check one):
❑ does ® does not incorporate pretreatment other than a forebay.
important maintenance procedures:
- Immediately after the wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commonly six weeks).
- No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the vegetated shelf.
- Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
- If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minimized to the
maximum extent practical.
- Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month and
within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a
Coastal County). Records of operation and maintenance should be kept in a known set
location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the wet
Areas of bare soil and/or
Regrade the soil if necessary to
detention basin
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of
long.
approximately six inches.
Form SW401-Wet Detention Basin O&M-Rev.4 Page I of 4

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How 1 will remediate theproblem:
The inlet device: pipe or
The pipe is clogged.
Unclog the pipe. Dispose of the
swale
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the swale if necessary to
swale.
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The forebay
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design depth for
possible. Remove the sediment and
sediment storage.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The vegetated shelf
Best professional practices
Prune according to best professional
show that pruning is needed
practices
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The main treatment area
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design sediment
possible. Remove the sediment and
storage depth.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over
Consult a professional to remove
50% of the area.
and control the algal growth.
Cattails, phragmites or other
Remove the plants by wiping them
invasive plants cover 50% of
with pesticide (do not spray).
the basin surface.
Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of

Permit Number:
(to be provided by DWQ)
Drainage Area Number: I
BMP element:
Potentialproblem:
How I will remediate theproblem:
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair. (if applicable)
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Division of
damage have occurred at the
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads 3.5 feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads 3.5 feet in the forebay, the sediment
shall be removed.
Sediment Removal
Bottom
531
---------------
EOREBAY
BASIN DIAGRAM
(fill in the blanks)
ft Min.
Sediment
Storage
Permanent Pool Elevation 534.5
Pool
Sediment Removal Elevation 531 Volume
Bottom Elevation
MAIN POND
j1jfLtji n.
Sediment
Storage
Form SW401-Wet Detention Basin O&M-Rev.4 Page 3 of 4

Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that 1 am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Projecl name:The Conservancy at Waxhaw Creek
BMP drainage area number:
Print
vane: Lo - t x- , f i
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
L.I-}fie , a Notary Public for the State of
�C-- County of LkF-S t i'^ , do hereby certify that
�be,nr%i s W. Mm se,! personally appeared before me this � Z
day of �u r� %z l , and acknowledge the due execution of the
forgoin wet detention basin maintenance requirements. Witness my hand and official
seal, az4l� 't ' oAvTr'
RAENAE H. LITTLE
NOTARY PUBLIC
Slanly County, North Carolina
My Commission Expires 4/16/2017
SEAL
My commission expires 6 - % ^ - 17
Form SW401-Wet Detention Basin O&M-Rcv.4 Page 4 of 4

Permit Number:
(to be provided bi, DWQ)
Drainage Area Number: Z
Wet Detention Basin Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
The wet detention basin system is defined as the wet detention basin,
pretreatment including forebays and the vegetated filter •if`onetis:,ptou'id"ad OURCES
" AND QUALITY SECTIO14
This system (check one):
❑ does ® does not incorporate a vegetated filter at the•outtet3 2014
v, ..nn.wiavIEN1
This system (check one): AND NATURAL RESOURCES
❑ does ® does not incorporate pretreatment other than a forebay.
Important maintenance procedures:
— Immediately after the wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commonly six weeks).
— No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the vegetated shelf.
— Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
— If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minimized to the
maximum extent practical.
— Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month and
within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a
Coastal County). Records of operation and maintenance should be kept in a known set
location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The entire BMP
Trash/debris is present.
Rcmove the trash/debris.
The perimeter of the wet
Areas of bare soil and/or
Regrade the soil if necessary to
detention basin
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide time and a
one-time fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of
long.
approximately six inches.
Form SW401-Wet Detention Basin O&M-Rev.4 Page I of 4

Permit Number:
(to be provided by DWQ)
Drainage Area Number: q—
BMP element:
Potentialproblem:
How I will remediate theproblem:
The inlet device: pipe or
swale
The pipe is clogged.
Unclog the pipe. Dispose of the
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the swale if necessary to
swale.
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The forebay
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design depth for
possible. Remove the sediment and
sediment storage
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The vegetated shelf
Best professional practices
Prune according to best professional
show that pruning is needed
practices
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it isnecessary.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The main treatment area
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design sediment
possible. Remove the sediment and
storage depth.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over
Consult a professional to remove
50% of the area.
and control the algal growth.
Cattails, phragmites or other
Remove the plants by wiping them
invasive plants cover 50% of
with pesticide (do not spray).
the basin surface.
Form SW401-Wet Detention Basin O&M-Rcv.4 Page 2 of 4

Permit Number:
(to be providcft by DWQ)
Drainage Area Number:L
BMP element:
Potentialproblem:
How I will remediate theproblem:
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair. (if applicable)
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Division of
damage have occurred at the
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads 3.5 feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads 3.5 feet in the forebay, the sediment
shall be removed.
Sediment Removal
Bottom EI
577
---------------
FOREBAY
BASIN DIAGRAM
(fill in the blanks)
R Min.
Sediment
Storage
Permanent Pool Elevation 580.5
Pool
Sediment Removal Elevation 577 Volume
Bottom Elevation 576 1 1-ft Ivjin.
Sedimerr
Storage
MAIN POND
Form SW401-Wet Detention Basin O&M-Rev.4 Page 3 of 4

Permit Number:
(to be provided by DWQ)
1 acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project nanle:The Conservancy at Waxhaw Creek
6MP drainage area
Date
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and it resident of the subdivision has been named the president.
le, a Notary Public for the State of
County of ru ii� do hereby certify that ,
-NiS 1VNo3e./ personally appeared before me this �rn
day of �u ne. U l J , and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal, Pp� A
E
ENAE H. LITTLENOTARY PUBLIC County, North Carolinamission Expires 411612017
SEAL
My commission expires
Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4

Permit No.
(to be erv.ded by DVM)
ATA r0P WA7Fg0
NC ENR _o�
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form must be filled out, printed and submitted
The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information.
Project name
Contact person
Phone number
Date
Drainage area number
111DESIGN INFORMATION
Site Characteristics
Drainage area [ 547,985�ft2
Impervious area, post-developmenl I 72,580!ft°
%impervious 13.24 %
Design rainfall depth Iference in Runoff.in
Storage Volume: Non -SA Waters
Minimum volume required
Volume provided
Storage Volume: SA Waters
1.5' mnoft volume
Pre -development 1-yr, 24-hr mnoft
Post -development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Peak Flow Calculations
Is the pre/post control of the lyr 24hr stone peak flow required?
1-yr, 24-hr rainfall depth
Rational C, pre -development
Rational C, post -development
Rainfall intensity: 1-yr, 24-hr storm
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
Pre/Post 1-yr, 24-hr peak flow control
Elevations
Temporary pool elevation
Permanent pool elevation
SHWT elevation (approx. at the perm. pool elevation)
Top of 10ft vegetated shelf elevation
Bottom of 10ft vegetated shelf elevation
Sediment deanout, top elevation (bottom of pond)
Sediment deanout, bottom elevation
Sediment storage provided
Is there additional volume stored above the state -required temp. pool?
Elevation of the top of the additional volume
I ft Q
S
r_— —'ft3
I 8,981ift3K
24,940; ft3
15,959 ft3 �f:P
j 15,95911ft3
I
r- _--Y _l(Y or N)
3.0, in
1 60.00'(unifless)
( 66.00;(unitless)
in/hr
1.92 ft3/sec
4.37 ft3/sec
2.45 ft3/sec
582.39:fmsl
580.50'''.fmst
Ifmsl
1 581.Wfmsl
I 580.00:fmsl
I 576.00jinsl
575.00,tmsl
1.00 it
Y ,(Y or N)
582.4;fmsl OK
Form SW401-Wet Detention Basin-Rev.9-0118112 Parts I. d IL Design Summary, Page 1 of 2

J
Permit No.
flo W provided by DWD)
11.9 DESIGNINFORMATION
Surface Areas
Area, temporary pool
9,0811h,
Area REQUIRED, permanent pool
8,220 ft'
SAIDA ratio
1.%(unitless)
Area PROVIDED, permanent pool, A,,,,,. !
6,483,ft'
Area, bottom of 1 Oft vegetated shelf, Any, ,,ae 1
5,0631111'
Area, sediment cleanout, top elevation (bottom of pond), A,. j
1,328,ft2
Volumes
Volume, temporary pool
15,959ift3
Volume, permanent pod, Vas, -rya
16,837; ft3
Volume, forebay (sum of forebays d more than one forebay)
3,1374ft3
Forebay %of permanent pool volume
18.6% %
SAIDA Table Data
Design TSS removal ��
90 %
Coastal SAIDA Table Used? i
N V or N)
Mountain/Piedmont SAIDA Table Used?
Y I(Y or N)
SAIDA ratio
1.50 limitless)
Average depth (used in SAIDA table):
Calculation option 1 used? (See Figure 10-21b)
N i(Y or N)
Volume, permanent pool, Vr s, ova
16,837 It'
Area provided, permanent pool, A_„
6,483 It'
Average depth calculated j
Ift
Average depth used in SAIDA, d,„ (Round to nearest 0.5ft)
Ift
Calculation option 2 used? (See Figure 10-21b)
Y i(Y or N)
Area provided, permanent pool, Am,R, ova
6,483 ft'
Area, bottom of 10ft vegetated shelf, A. Man
5,063 ft'
Area, sediment cleanout, top elevation (bottom of pond), A�
1,328 ft2
'Depth' (distance bhv bottom of 1 Oft shelf and top of sediment)
4,00 It
Average depth calculated 1
3.00I11
Average depth used in SAIDA, d„, (Rand to down to nearest 0.5ft)
3.0;ft
Drawdown Calculations
Drawdown through odfce?
Diameter of orifice (if circular)
Area of orifice (if -non -circular)
Coefficient of discharge (Co)
Driving head (He)
Drawdown through weir?
Weir type
Coefficient of discharge (C..)
Length of weir (L)
Driving head (H)
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
Storage volume discharge rate (through discharge orifice or weir)
Storage volume drawdown time
Additional Information
Vegetated side slopes
Vegetated shelf slope
Vegetated shelf width
Length of flowpath to width ratio
Length to width ratio
Trash rack for overflow 8 orifice?
Freeboard provided
Vegetated filter provided?
Recorded drainage easement provided?
Capures all runoff at ultimate build -out?
Drain mechanism for maintenance or emergencies is:
31:1
10' a
Insufficient permanent pool surface area
OK
OK
Need 3 ft min.
OK
OK
OK, draws down in 2-5 days.
OK
OK
OK
:1
OK
:1
OK
(Y or N)
OK
ft
OK
(Y or N)
OK
(Y or N)
OK
(Y or N)
OK
Form SW401-Wet Detention Basin-Rev.94118112 Pans I. a 11. Design Summery, Page 2 of 2

Permit No.
(to be pmvNa l by DWq)
RWA
MA
2pF W Ar fA?
NCDENR
p�
STORMWATER
MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information.
Iq P. ROJECTi INFORMATION
Project name
The Conservancy at Waxhaw Creek
Contact person
Andrew R. Poindexter, E.I.
Phone number
I(704) 315-5734 )
Date
'6)2312014 (Revased 8125I2014)
Drainage area number
it
IA DESIGNINFORMATION
Site Characteristics
Drainage area
7,911,6781,ft'
Impervious area, post -development
i 186,8711ft2
impervious
9.78
Design rainfall depth
fference in Runoff, in
Storage Volume: Non -SA Waters
Minimum volume required
;fts "01
Volume provided
efts
Storage Volume: SA Waters
1.5" runoff volume
Pre -development 1-yr, 24-hr mnoff
65,886'.fts
Post -development l-yr, 24-hr runoff
107,321;fts }
Minimum volume required
41,435 fts
Volume provided
41,435;113
i
Peak Flow Calculations
Is the prelposl control of the tyr 24hr storm peak flow required? ^ Y I (Y or N)
1-yr, 24-hr rainfall depth
i 3.0;in
Rational C, pre -development
i 63.001(unitless)
Rational C, post -development
- 64.00':(unitless)
Rainfall intensity:l-yr, 24-hr storm
I 'in/hr
Pre -development 1-yr, 24-hr peak flow
16.07 ftslsec
Post -development 1-yr, 24-hr peak flow
0.88 ftslsec
PfelPost 1-yr, 24-hr peak Bow control
-15.19 ftslsec
Elevations
Temporary pool elevation
i 536.03'!fmsl
Permanent pool elevation
534.50'fmsl
SHWT elevation (approx. at the perm. pool elevation)
1 '.fmsl
Top of 1 Oft vegetated shelf elevation
i 535.00;tmsl
Bottom of 1 Oft vegetated shell elevation
I 534.00; bosl
Sediment deanout, tap elevation (bottom of pond)
I 531.00,fmsl
Sediment deanout, bottom elevation
I 530,00if iml
Sediment storage provided
1.00 ft
Is there additional volume stored above the state -required temp. pool? Y II (Y or N)
Elevation of the top of the additional volume
536.0ifmsl OK
Form SW401-Wet Detention Basin-Rev.94119112 Paris I. a 11. Design Summary, Page 1 of 2

Permit
(to be provided by Di
II.NDESIGN'.INFORMATION
Surface Areas
Area, temporary pool
Area REQUIRED, permanent pool
SAIDA rate
Area PROVIDED, permanent pool, Aswan,
Area, bottom of 1 Oft vegetated shelf, A,,.
Area, sediment cleanout, top elevation (bottom of pond), A,1.
Volumes
Volume, temporary pool
Volume, permanent pool, Va, .
Volume, forebay (sum of forebays if more than one forebay)
Forebay %of permanent pool volume
SAIDA Table Data
Design TSS removal
Coastal SA/DA Table Used?
MountainlPiedmont SAIDA Table Used?
SAIDA ratio
Average depth (used in SAIDA table):
Calculation option 1 used? (See Figure 10-2b)
Volume, permanent pool, Vrii."
Area provided, permanent pool, Ar,,,,, c
Average depth calculated
Average depth used in SAIDA, dam., (Round to nearest 0.5ft)
Calculation option 2 used? (See Figure 10-2b)
Area provided, permanent pool, Arai„ erA..
Area, bottom of 10ft vegetated shelf, A._.
29,674ift'
17,205 ft
f 0.90,(unl0ess)
17,2051ft' OK
20 5971ft'
I 15,361,ft'
41,435'.ft'
OK
64,896'ft'
1 13,91lift,
21.4%%
OK
N
N �(Y or N)
Y In or N)
0.90 (unitless)
N I(Yor N)
64.896 ft'
17,205 ft'
;it
j :it
Y I(Y or N)
17,205 ft'
20,597 ft'
Area, sediment cleanout, top elevation (bottom of pond), A,,. 15,361 ft'
'Depth' (distance blw bottom of 1 Oft shelf and top of sediment)
Average depth calculated
Average depth used in SAIDA, it., (Round to down to nearest 0,5ft)
Drawdown Calculations
Drawdown through office?
Diameter of orifice (9 circular)
Area of orifice (if-noncircular)
Coefficient of discharge (CD)
Driving head (Hp)
Drawdown through weir?
Weir type
Coefficient of discharge (C„)
Length of weir (L)
Driving head (H)
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
Storage volume discharge rate (through discharge orifice or weir)
Storage volume drawdown time
Additional Information
Vegetated side slopes
Vegetated shelf slope
Vegetated shelf width
Length of flowpath to width ratio
Length to width ratio
Trash rack for overflow 8 orifice?
Freeboard provided
Vegetated filter provided?
Recorded drainage easement provided?
Capures all runoff at ultimate build -out?
Drain mechanism for maintenance or emergencies is:
3.00 it
3.00 ft
3.0;ft
Need 3 it min.
OK
OK
OK, draws down in 2-5 days,
----7 OK
10!:1 OK
10. iff OK
I 3':1 OK
2.11:1 OK
i Y I(Y or N) OK
1.0:ft OK
1 Y I(Y or N) OK
1 Y I(YorN) OK
Y I(Y or N)--OK—
Form SW401-Wet Detention Basin-Rev.94/18/12 Parts 1. S 11. Design Summary, Page 2 of 2