20072022 Ver 1_401 Application_20071207

Horvath Associates, PA
Civil Engineers • Planners • Landscape Architects
16 Consultant Place Ste. 201 Durham, NC 27707
PO. Box 51806 Durham, NC 27717-1806
K , (919)(490-4990 Fax [phone]
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Addendum to the Pre-Construction Notification and "Buffer Rules" Application Required for
Projects Submitted Under the
"Express Review Program"
North Carolina Division of Water Quality Version 5.0
October 1, 2006
Email Address: [e-mail]
Purpose: To provide a detailed explanation of the information required by the Division of Water Quality
in order to expedite the review of applications for 401 General Water Quality Certifications, Isolated
Wetland Permits, Stream and Wetland Mitigation Plans and Riparian Buffer Approvals (Please Note: do
not leave any questions unanswered or use terms such as "N/A" without an explanation).
Fees:
401 Water Quality Certifications
Riparian Buffer Authorization:
Riparian Buffer Minor Variance:
Coastal General "Major Variance"
Isolated Wetland Permit:
Major (>/= 150' stream or >/= 1 acre wetlands) $2,000.00
Minor (< 150' stream or < 1 acre wetlands) $1,000.00
(exclusively or "in addition" to) $2,000.00
$1,000.00
$1,500.00
General $1,000.00
Please read the entire document before attempting to determine the proper fee. Fees are additive for
particular projects.
Things to keep in mind when filling out the application:
A specific answer must be provided for each question. For instance, if a numerical answer is requested
then a numerical answer must be provided along with the supporting information necessary for DWQ staff
to verify that the number is accurate. Likewise, if explanations are presented to justify certain responses,
the explanations must be completely supported by documentation. DWQ staff cannot assume that
unsupported or undocumented information is accurate. "N/A" is not an acceptable answer for any
question since the DWQ Staff reviewing the application must have an opportunity to determine whether or
not any requested information is pertinent.
All forms, guidance, worksheets, applications, etc. used must be the current versions as posted on our
web site at http://h2o.enr.state.nc.uslncwetlands. The Express Review Program website can be found at
http://h2o.enr.state.nc.us/ncwetlands/express_review.htm. Please note that it will be responsibility of the
applicant or the applicant's consultant to verify that the current versions are used. The versions posted
on our web site will be considered to be the current versions.
You are a very important part of the success of this program, if you have suggestions or clarifications
please send your comments to the Wetlands/401 Unit of the DWQ (via email at
401 [e-mail]).
Filling Out the Pre-Construction Notification Application:
The Corps of Engineers (USAGE)/DWQ official, joint Pre-Construction Notification (PCN) Application
must be used as a basis for the expedited review process. The completed application should be
presented first and the supporting information tabbed and collated in the same order. Using a custom
format is not recommended. The open squares (~ are checklist items. The following items correspond to
the numbering system on the Pre-Construction Notification Form (PCN):
IMPORTANT: USE CHECK BOXES TO TRACK PROJECT INFORMATION!!

SECTION I. PROCESSING
~f 1 8~ 2.The USACE determines which Nationwide, Regional, or General Permit is
required. If you have verified with the USACE which permit they intend to use for
your project or if you already have written approval from the USACE, please
indicate by adding "verified" or "verified, attached", respectively, in the blank next
to the Permit number requested.
^ Attach the USACE Approval if you have it.
[~' 3. It is not anticipated that the expedited process will be requested for this situation.
C~" 4. If you propose to impact 150 feet or more of perennial stream or 1 acre or more
of wetland and onsite mitigation is not proposed, it is recommended that you
either locate an acceptable private bank with available credits (with
documentation to show that the bank can and shall provide the credits needed)
or obtain approval from the EEP for the entire amount of stream and or wetland
as DWQ will make the final determination as to whether or not mitigation applies.
A complete Express application is not considered received unless an EEP
approval letter is attached if mitigation is requested through EEP. Please note
that the USACE may have different mitigation requirements and thresholds.
f~ 5. State whether your project will require a CAMA Minor, Major or General Permit
and give the status of the permit.
SECTION II - APPLICATION INFORMATION
1. 15 NCAC 2H .502(t~ reads as follows: "Who Must Sign Applications. The application
shall be considered a "valid application" only if the application bears the signature of a
responsible officer of the company, municipal official, partner or owner. This signature
certifies that the applicant has title to the property, has been authorized by the owner to
apply for certification or is a public entity and has the power of eminent domain. Said
official in signing the application shall also certify that all information contained therein
or in support thereof is true and correct to the best of his/her knowledge."
C~ Please indicate how the applicant meets the above definition and provide
supporting documentation.
[~ Please provide all of the requested contact information including a fax
number and email address.
2. E~ If the application is not signed by the applicant, please attach the agent authorization
letter. The applicant must sign the agent authorization letter. The applicant's name
and position must also be spelled out as many signatures are difficult to read.
3. ~1 Please provide all of the requested contact information including a fax number and
email address.
SECTION III -PROJECT INFORMATION
The following is the most critical of all the information that you must provide. The quality and detail of the
information will often determine the expeditiousness of the review. The following is a checklist of the
types of pertinent information required at a minimum:

Maps and Plans:
[~ The most recent version of the 1:24,000 USGS Topographic Map- Please cleanly
delineate the site boundaries, etc. on the map. If the delineation obscures any of the
features, it is recommended that a clean copy be provided. Please indicate the
quadrangle name. You can go to the USGS web site (http://mac.usgs.gov/maplists/) to
/ verify the most recent version.
C~ The most recent version of the NRCS Soil Survey Map - (required for projects within
the Neuse River Basin, Tar-Pamlico River Basin, Randleman Lake Watershed and the
Catawba River Basin, also recommended for all projects) -Please cleanly delineate the
site boundaries, etc. on the map. If the delineation obscures any of the features, it is
recommended that a clean copy be provided. Please indicate the page or map number
from which the copy of the map was made. Copies of the current soil survey and/or soil
survey map sheets can be obtained from the local NRCS County Office
/ (http://www.nc.nres.usda.gov/). GIS soil layers are not acceptable.
C~" Vicinity map -Please clearly mark the location and approximate boundaries of the
property and project on the map. Please indicate north and scale. Please include
applicable road names or State Road numbers.
C~' The Site Plan -The most critical map to be provided is the site plan. You must provide
full sized plans. The following is the minimum list of plans that are typically needed.
C~ Pre-construction/Pre-existing conditions -This sheet must be scaled and
include all jurisdictional and non jurisdictional wetland, stream, water features,
State regulated buffers, topographic contours with elevations, approximate extent
and nature of forest, field, landscaping, or other cover. Any existing structures and
impervious area must be shown. Existing utility lines and easements must be
shown. Existing roads, culverts, and other pertinent features must be shown. North
arrow and the scale must be shown. Please note that the impact boundaries on the
maps should correspond to the flagged impact boundaries in the field.
Proposed conditions -These sheets must be scaled and show all existing
jurisdictional and non jurisdictional wetland, stream, water features, and State
regulated buffers (delineated into Zone 1 and Zone 2) must be underlain on the site
plan(s). The plans must show all built-out structures and impervious cover. The
plans must include the final grading contours with elevations. The plans must
indicate all utilities and easements. It is likely that several versions of the final built-
outsite plans will be necessary.
Drainage Plans -Final drainage plans must be included. The plans should include
the locations and pertinent elevations and sizes of the collection system and
drainage ways. All inlets and outlets must also be shown with pertinent elevations.
Scaled stormwater BMPs must also be indicated as required by DWQ rules and
policies. In certain cases, final stormwater management plans must also be
provided, but that will be addressed later in this document.
Plats -The plans must show the location and layout of all sub-divided parcels with
lot identifications. Platted parcels must be developable without further impacts to
jurisdictional and non-jurisdictional wetlands, streams, water features, and State
regulated buffers.
Proposed Impacts -All impacts to jurisdictional and non-jurisdictional wetland,
stream, water features, and State regulated buffers must be shown and labeled on
the site plans. All excavation, fill, flooding, stabilization, and other impacts that will
be conducted in or near jurisdictional and non jurisdictional wetland, stream, water
features, and State regulated buffers must be indicated.

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Wetlan/d Impacts (on the site plan):
C~' Precise grading and final elevation contours must be provided. Existing vegetation and
any clearing must be specified.
C~ All subsurface utility lines must indicate the location of anti-seep collars. Construction
detail for anti-seep collars must be provided.
C~ Roadway or other crossings of riparian wetlands may require floodway culverts to
maintain existing hydrological conditions.
[/7 When surface drainage features or groundwater recharge areas that feed or would
reasonably feed wetlands that are not to be filled are made impervious, it may be
necessary to direct some stormwater runoff to those areas in order to maintain hydrology.
You must identify these areas and address them. Supporting explanations and discharge
information must be provided to show that the wetland would not be eroded or receive
too much or too little hydrology. In many cases this could help satisfy part of a
stormwater management plan.
~ Flooding
i~ Draining
Stream Impacts:
~1 Stream impacts must be clearly shown on the plans. The centerline as well as the banks
of the stream must be surveyed or located by GPS for the portion of the stream to be
impacted.
Culverting:
The inlet and the outlet of the culvert should be aligned with the stream as much as
possible. Inlet and outlet elevations and streambed elevations should be indicated.
I3 Any widening of the stream must be shown with elevations.
C~' The extent of and plan details for all dissipation or grade control devices should be shown
with pertinent elevations.
For shorter culvert sections, such as for road crossings, a longitudinal cross section that
shows the stream bed invert at the inlet and outlet, the existing stream bank elevations
and the invert of the inlet and outlet of the pipe(s) must be provided.
d~ For shorter culvert sections, such as for road crossings, a vertical cross section must be
provided that shows the stream cross section at the inlet and outlet overlain with the
culvert and fill cross section.
C~ For bottomless culverts or other spans, a vertical cross section should be provided that
shows the minimum distance from each span to each stream bank, the stream cross
section, the height of the span above the stream and the minimum distance from the
edge of each footer to each stream bank.
[~ For bottomless culverts or other spans, a plan view must be provided that shows the
location of the spans and the stream banks.
C~ For longer culverts or culverts that will pass beneath substantial impervious cover, it will
be necessary to provide adequate plan detail to show that discharge velocity/energy will
be adequately dissipated.

~ Cross section details must be provided showing the provisions for aquatic life passage.
Aquatic life passage through culverts is typically achieved by placing the invert of the
culvert below the existing bed of the stream per the USACE or North Carolina Wildlife
Resource Commission guidelines. Other methods such as baffles may also be used.
Please be aware that such placement may require the use of grade/velocity control
measures up or down stream of culverts on steeper streams to prevent head-cuts or
streambed erosion. The culvert placement relative to the streambed can be indicated on
the longitudinal profile. Grade and velocity control measures must be indicated on the
plan view and typical designs should be provided.
C3~ Multiple culverts, wide culverts or sectioned box culverts typically require the use of sills
off-setting or other means to match the cross section of the existing stream (in order to
maintain stream stability and provide aquatic life passage). A vertical cross section of the
culverts should be shown overlain with the up and downstream stream cross section
including the stream flood-prone area.
C~" Impacts associated with dam construction must indicate and enumerate all fill associated
with the dam footprint, spillway and any bank stream bank stabilization. The length of
stream impounded must also be indicated and enumerated.
Stream Relocations:
Stream relocations must be conducted as specified in General Certification numbers
3402 and 3404 (available on the Wetlands Unit web site). Stream relocation plans must
include:
C7 Morphological measurements (see Appendix B of the Internal Technical Guide for Stream
Work in North Carolina available on the Wetlands Unit web site) -not all of the
measurements are applicable in every instance.
Typical stream cross sections - Typically, a riffle cross section and a pool cross section
that includes the entire flood prone area. The bankfull and flood prone area elevations
should be indicated. Similarly, a riffle cross section of the reference stream(s) should be
provided.
C~" Plan view -Provide scaled plans that show the location of the proposed (preferably with
stationing) and the existing stream. In most instances, the bankfull contours and flood
prone area contours, in stream structures, bank revetments/stabilization, channel plugs,
planting plan, vegetation conditions, stormwater outlets, grade controls, bridges, culverts,
sewer lines, roads, fencing, and easement lines should also be provided.
C~ Longitudinal Stream Profile - A scaled profile that indicates the thalweg, bankfull, and top
of bank elevations should be provided for the design and reference streams. In many
cases, it will also be necessary to show the existing land elevations for the design
stream.
C~ Planting Plan - A planting and/or vegetation management plan should also be provided
that makes use of appropriate native vegetation. The plan should indicate the extent,
density, and species of plants to be provided.
G/ In-stream structure, bank revetment/stabilization, and stormwater outlet typicals -
Detailed, typical plans should be provided for all in stream structures, bank revetments or
stabilization, and stormwater outlets. The typicals should include materials and
specifications as well as relative lengths, positions, and angles.
Sediment transport analysis - A sediment transport analysis should be provided based
on the current, relevant, accepted practices. The sediment transport analysis should be
relevant to the streambed load type and should predict bed load transport equilibrium.

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^ Permanent conservation easement or similar means of protection must also be provided.
Other Information:
1. The project should always be referred to by this name in all correspondence as well
as the DWQ # once it is provided.
~ 2. This only applies to DOT projects, which are not expected to utilize the Express
Review Program.
C~ 3. This should be the size of the project as identified by the USACE for 404 Permits or
by the Division of Water Quality for Buffer Approvals and Isolated Wetland Permits.
f~ 4. Please provide the name (as depicted on the USGS topographic map and DWQ
Stream Classification Lists) of the nearest water body(ies) to which your project is a
tributary to (e.g. "Neuse River (Falls Lake below normal pool elevation)"). (Do not
simple state "stream", "river", "ocean", "sound" or "lake".) Please provide the "stream
index number" of the named water body or water body section (e.g. "27-(1)"). Also,
please provide the full water quality classification (e.g. "WS-IV NSW CA") of the water
body. This information can be obtained from the DWQ web site
http://h2o.enr.state.nc.us/bims/Reports/reportsWB. html.
5. Please state which river basin and sub-basin that your project is in (e.g. "Neuse River
Basin, NEU01"). This information can be obtained from the DWQ web site
http://h2o.enr.state.nc. us/bims/Reports/reportsWB.html.
C~ 6. Conditions should also be indicated on the existing site plan where applicable.
Photos (including aerial photos) can be helpful in describing the existing conditions.
C~' 7. You must provide an attachment that explicitly describes what the proposed project
will entail from the planning stage to final construction.
r3 8. This can be a simple explanation, but it is critically important because the purpose
dictates how the no practical alternatives are reviewed.
SECTION IV -PRIOR PROJECT HISTORY
Jf~ Please include copies of all 401 Water Quality Certifications, Isolated Wetland
Permits, Buffer Approvals, USACE Permits, CAMA Permits for the site as well as a
copy of the final approved, site plan.
SECTION V -FUTURE PROJECT PLANS
[~ For projects utilizing the express review process, all impacts both present and
potential future must be indicated. For instance, the location or configuration of
platted lots sometimes suggests that future impacts will be necessary to build,
access, or otherwise develop such lots. Failure to account for such potential impacts
could delay or disqualify a project from the rapid review process. If you believe that
the lot can be developed without impacts, but you anticipate that your assertion may
be questioned, it is recommended that you provide a potential building foot print
and/or grading plan to show that future impacts could be avoided.
SECTION V -PROPOSED IMPACTS TO WATER OF THE US
1. It is recommended that the individual impacts be described if there are special things
to note about the impacts. Typically the most important thing is to have detailed
accurate site plans as described above. Please make sure they are clearly labeled.
^ Please include all proposed temporary impacts.

7
~ Also, a current, signed delineation map from the USACE should be provided (if
available) and a map locating the stream origins signed by the appropriate DWQ
Staff must be provided if applicable.
~ 2. Each impact to a wetland must be clearly labeled and identified on the site plan. The
type of impact must be clearly stated. If the impact is temporary, a specific plan must
be described or shown as to how the wetland will be restored. Keep in mind that the
USACE delineates some features as wetlands that DWQ calls streams. Please list
any impacts in this table that DWQ would identify as a stream. If there is any doubt,
it is recommended that the impacts be listed as streams. Please follow current DWQ
policy with respect to whether a stream is perennial or not. It is recommended that
you assume that a stream is perennial (unless you are positive that it is not) so if
mitigation is required then the appropriate amount of mitigation would be anticipated
or requested from the EEP or private bank. If the EEP or private bank has pre-
approved too short of an amount of stream or if inadequate mitigation is proposed,
then that situation will result in delays.
C~ 3. Sometimes it is difficult to determine whether a feature is a modified natural channel
or a ditch, especially in the eastern part of the State. Soils, drainage features,
topography, macroinvertebrates, and similar factors, all are important for making that
determination.
[,~ 4. Other items to address not specifically requested in the application include
downstream sediment starvation, thermal pollution, low flow releases from dams, and
aquatic life passage. Other important considerations are buffer reestablishment or
mitigation around ponds on buffered streams. The site plan should include the
precise elevation contour of the normal pool as well as the dam footprint. Mitigation
is required for wetland flooding of an acre or greater and for stream fill (if over the
150 foot threshold) under the dam footprint and any outlet stabilization.
SECTION VII -AVOIDANCE AND MINIMIZATION
Avoidance and minimization are critical aspects of an application particularly if you desire the application
to be processed expeditiously. The following is a checklist of avoidance and minimization questions that
DWQ Staff often look for in applications.
C~' Are there any stream crossings at angles less than 75° or greater than 105°?
C~' Are there any stream crossings that cross two streams above or at the confluence of those
streams?
C~ Are there any stream, wetland, water, and/or buffer impacts other than perpendicular road
crossing near the edges of the property?
C~ Can the stream be relocated as a natural channel design as opposed to culverted or
otherwise filled?
[-3~ Is any single stream crossed more than once?
C~ Can property access routes be moved or reduced to avoid stream, wetland, water, and
buffer impacts?
d Can a building, parking lot, etc. be realigned to avoid impacts?
C3'/ Can the site layout be reconfigured to avoid impacts?
C~ Can headwalls or steeper side slopes be used to avoid/minimize impacts?

8
C~3' Can a retaining wall be used to avoid/minimize impacts?
d Can cul de sacs be used in place of a crossing?
[~ Can lots be reshaped or have shared driveways to avoid impacts?
If based solely on the practicable physical possibility, the answer is "yes" to any of the above questions
then you must have to provide substantial and convincing justification as to why the impacts are
necessary. If the impacts are required by a local government or other agency, the claim must be
supported with appropriate written documentation from the local government or other agency. Most
projects typically involve the need to justify avoidance and minimization. If this information is not readily
available, then the express review process may not be the appropriate venue to use. Providing
alternative plans (such as plans that avoid the impact, minimize the impact and the preferred plan, similar
to those used in environmental assessments) and explanations as to why the preferred plan is needed
and why the alternative plans won't work are many times helpful in the no practical alternatives review.
SECTION VIII -MITIGATION
Mitigation for the Express Review Program, final mitigation plans must be presented up front. The final
plans (except for plans that propose payment into the Ecosystem Enhancement Program (EEP), Riparian
Buffer Restoration Fund, private mitigation banks, or similar banking instruments) must contain detailed
plans, specifications, calculations and other supporting data that show that the appropriate mitigation will
be achieved at the ratios required. The design plans must be developed to at least the "90%" level.
Monitoring plans must be final and specific. Any means of permanent protection, such as a permanent
conservation easement must be provided. If you elect to use the EEP or a private mitigation bank, it is
recommended that you request the maximum possible mitigation amount that DWQ may require so that
you will not have to get further approval from them on short notice. The EEP and private banks are not
part of the expedited review process and cannot be expected to meet any such deadlines. There will be
no conditional expedited approvals that require final plans at a later date. It is not recommended that
innovative mitigation techniques or greater than 10% preservation be requested as part of an expedited
process.
SECTION IX
If your project requires the preparation of an environmental document under NEPA or SEPA and an
approval letter has not been issued by the State Clearinghouse, then you cannot apply under the
expedited review process. It is your responsibility to find out if such documentation is required.
SECTION X
There are many aspects of the Buffer Rules that must be addressed in every application, if applicable.
The first and most important thing to keep in mind is that allowable activities that require written Approval
from DWQ triggers a review of the entire project for compliance with the Buffer Rules.
Diffuse Flow ~ stormwater Management:
L9~ The most common issues that arise involve the requirement for diffuse flow of stormwater
through riparian buffers. Basically one of three things must be indicated in regards to all
"new" stormwater that is collected and subsequently discharged. First, provisions for
diffuse flow through the protected buffer must be made. This usually involves the use of
level spreading devices designed to the latest DWQ guidance on level spreader design,
which is available on our web site. Please keep in mind that it does not matter how far a
discharge point is from a buffer. The stormwater must be flowing in a diffuse manner at
whatever point it eventually reaches the buffer. If the stormwater will not be flowing in a
diffuse manner through the protected buffer at the point it reaches the buffer, then one of
the following options may be allowed:
C3 You may provide a nitrogen removing measure such as a forested filter strip,
grassed swale, stormwater wetland, etc. The measure employed should be

designed according to the NC DENR Stormwater Best Management Practices
Manual or other DWQ Guidance available at
http://h2o.enr.state.nc.us/ncwetlands/regcert.html. After the nitrogen is treated, the
stormwater can be directly conveyed through the buffer with written DWQ approval.
^ You may discharge the stormwater to an existing man-made conveyance that
currently conveys stormwater through the protected buffer (assuming the
conveyance was not constructed in violation of the Rules) as long as that
conveyance does not need to be altered to convey the flow. Please remember that
there are no other choices. The following checklist is intended to help insure that
your application will not be deemed incomplete as a result of improper stormwater
design.
Stormwater Management (for Buffer Rules compliance only -Also, see Section XI):
~9" All stormwater out-falls must be clearly shown and labeled on the site plan for projects in
Buffered watersheds. List each out-fall as labeled:
[3~ Option 1: Level spreading devices designed to the latest DWQ Guidance, and
devices that merely control velocity but do not provide diffuse flow such as rip rap
dissipators are not proposed. List each of these out-falls as labeled on the site
plan and provide a DWQ worksheet available at
http://h2o.enr. state. nc. us/ncwetlands/regcert. html:
^ Option 2: Nitrogen removing measures designed to DWQ Standards are
proposed for discharges for which diffuse flow through a protected Buffer cannot be
met. List each of these out-falls as labeled on the site plan and provide a DWQ
worksheet available at http://h2o.enr.state.nc.us/ncwetlands/regcert.html
C~ Option 3: The stormwater will be discharged to an existing man-made (not
including modified natural channels) conveyance that carries the stormwater
through the Buffer. The conveyance was not constructed in violation of the Buffer
Rules. List each out-fall as labeled:
C3~ All stormwater out-fall must meet one of the options above. (Note: if you cannot check this
box your application will likely not be accepted into the express review process.)
Site Plans:
C~' All applications on properties with DWQ protected buffers must clearly depict the buffers
and any impacts to the buffers on the site plans. The impact maps should clearly depict
both zones of the protected buffers and the proposed impact areas (provided in square
feet).
Surface Water 8~ Buffer Delineations:
[~ Any surface waters subject to DWQ protected buffers must be field located and accurately
depicted on the site plans and impact maps. The width, dimensions and pattern of the
surface water must be delineated. The surface water location must not be taken simply
from a USGS map, soil survey or local municipality's map. The buffers must be measured
from the surface water as required within the applicable buffer protection rule (e.g., all
buffers along streams subject to the Neuse and Tar-Pamlico Buffer Rules must be
measured from the "top-of-bank" of the stream and not the centerline of the stream). All
streams must be surveyed or located by GPS and shown precisely on the site plans.
Impact Table:

10
Please provide additional impact tables that clearly state the area of impact for each
corresponding impact site.
Variances:
Projects that require a Major and/or "General" Variance will not be eligible for the use of the
Express Review Program (with the exception of the Coastal General "Major" Variance.
Mitigation:
C~ As opposed to applications that are submitted under our regular process, final mitigation
plans must be presented up front (see requirements for Section VIII above). The mitigation
plans must comply with the applicable buffer mitigation rule.
SECTION XI - STORMWATER
Please provide the following information in regards to potential stormwater requirements:
The total acreage of the site. q'22-(0~ (acres)
C~ The total built-out impervious acreage ~ D~ ~ 4Z (acres)
The total area that will be disturbed 3~ • ~~ (acres) ~~ /~F2~4S7~e. ~~~~~
C~ If the total area exceeds 20% imperviousness, the development on the site is uniform in
density, and you claim that the total impervious area is less than 30%, you must provide a
complete, detailed breakdown of the assumed built-out conditions. The breakdown must
be detailed enough to show that all potential impervious areas are accounted for.
C~ If there are concentrated areas of development such as multi-family, commercial, cluster,
club houses, etc. that exceed 30% imperviousness and the total imperviousness for the site
does not exceed 30%, a stormwater management plan will likely be required for those
areas that exceed 30% imperviousness.
C~ stormwater management plans must be complete with a final design and an executed
Operation and Maintenance Agreement. There will be no conditional stormwater approvals
for the express review process that allow for approval of the final plans at a later date.
Worksheets must be provided that are available at
http://h2o. eh n r.state. nc. us/ncwetla nds/m itresto. htm I.
SECTION XII -SEWAGE DISPOSAL
C~ Response must be clear and detailed. Any disposal method that suggests further impacts
may be required other than those shown must be clearly addressed on the site plans.
SECTION XIII
Answering yes to either of these responses automatically precludes you from the express
review process.
SECTION XIV -SIGNATURE
~7 The name, position and/or title of the applicant must be in type or long hand script here with
the signature. It should be the same person as described in Part II.
If you have any questions about these requirements, please email the Express Review Program at
401 [e-mail] and include your question and phone number and the appropriate staff will
respond as soon as possible.

SIERRA
SECTION 401 PERMIT NARRATIVE
SIERRA
Doc Nichols Road and Leesville Road
Durham, North Carolina
Horvath Associates Project No.: 0713
December 19, 2007
Prepared for: MacGregor Development Company
201 Shannon Oaks Circle, Suite 201
Cary, North Carolina 27511
[phone]
Prepared by: Horvath Associates, P.A.
Engineers -Planners -Landscape Architects
P.O. Box 51806
Durham, North Carolina 27717
[phone]

SIERRA
SECTION 401 PERMIT NARRATIVE
General Descriation
Sierra is a proposed 422.60-acre subdivision located between the northeast
intersection of Doc Nichols Road and Leesville Road and the southeast corner of
Doc Nichols Road and Olive Branch Road in Durham, North Carolina. It will
consist of single family homes and townhomes and is zoned PDR 3.0. The site is
located along Earthquake Creek and is located in the Neuse River Basin.
Earthquake Creek is classified by US Army Corps as a perennial stream, and the
majority of its tributaries on the site are unimportant intermittent streams.
This project is a phased design. Construction-level design documents are being
reviewed by the City of Durham for only the infrastructure construction,
including Athena, Atlas, and Bowhall roads. Phased pods of single- and multi-
family units will be designed at a later date. However, this permit application will
address the impacts created in the anticipated built out condition; no new
impacts are expected in future phases.
Pre-Construction Notification Narrative
(This narrative follows the structure of the North Carolina PCN Addendum, which
is attached.)
Section 1: Processing
The permit under consideration is a Nationwide 29 Permit, administered by the
NC DWQ under the Clean Water Act Section 401. The Express Review process
has been initiated. Mitigation is required for some of the impacts on the site;
payment to the NCEEP is proposed. Acceptance into the In-Lieu Fee program
has been obtained, and the acceptance letter is attached.
Section 2: Applicant Information
The applicant, East Durham Land Company, LLC, has authorized Horvath
Associates as their agent with an agent authorization form, which is attached.
The contact information for both parties is included on the PCN.
Section 3: Project Information
The following maps are attached: USGS, NRCS Soil Survey, vicinity map,
construction drawings (24x36 full size plans), drainage map (24x36 full size plans),
and impact maps (8.5x11 sheets). All stream impacts and buffer impacts are

shown on the impact maps. There will not be any wetland impacts on this site.
There are 20.47 acres of wetlands on the site, but any impacts will be avoided.
There are two culvert crossings on the site. Culvert details are shown on the
impact maps and the culvert design profiles (attached). Velocity dissipators are
shown on the impact maps, and calculations are attached. There are no stream
relocations on the site.
The portion of the DWQ Stream Classification List pertinent to this project is
attached. Lick Creek is the nearest receiving stream; some of the site drains to
Martin Branch, which drains to Lick Creek, too. Martin Branch is not included in
the DWQ Stream Classification List.
Section 4: Prior Project History
Copies of two stream determinations are attached.
Section 5: Future Project Plans
Even though the fully-developed, built-out condition is not shown on the impact
maps (it will be designed in the future), all anticipated impacts are shown. The
owner reserves the right to apply for future impacts based on unanticipated
conditions.
Section 6: Proposed Impacts to Wafers of the US
The proposed impacts include two culvert crossings (one over unimportant
intermittent stream and the other over perennial stream), nine utility line
crossings (five over intermittent stream, three over perennial stream, and one
over both), and two fill locations (crossing will be avoided, only buffer impacts).
Some of the buffer impacts are by sanitary sewer that will travel parallel to the
stream, and some are by perpendicular crossings. Any perpendicular utility
crossings across perennial stream will use jack and bore techniques to avoid
impacting perennial stream channels - these impacts are considered
temporary.
Summaries of the buffer and stream impacts are attached.
All onsite streams have been subject to a stream determination by NC DWQ.
Several detention basins are included in the overall stormwater impact analysis
approved by the City of Durham at site plan level. All of the ponds will be built
upland, outside of Neuse buffers and wetlands. Diffuse flow through all stream
buffers is required and will be incorporated into the design of each basin. Final
designs of the basins will be completed as each phase or pod is designed.

Impacts beyond those identified in this submittal as a result of the detention
basin designs are not anticipated.
Section 7: Avoidance and Minimization
Extensive avoidance and minimization techniques are practiced throughout the
site. All wetland impacts are avoided by the layout of the site. Additionally, the
individual pods and phases of the subdivision, including single- and multi-family
homes, are located between the streams with Neuse buffers. As a result, only
two stream crossings are currently planned.
The Atlas stream crossing (perennial) is 105 degrees and the Athena stream
crossing (intermittent) is 66 degrees. While the Athena crossing is less than 75
degrees, the crossing occurs near a 90-degree bend in the stream. The situation
of the road parallel to the stream buffer allows for an avoidance of impacts,
and the crossing's location avoids impacting a nearby intermittent tributary (to
the north-northeast), while allowing for adequate space to develop pods of lots.
Headwalls are used on each crossing to minimize impacts, but due to the steep
grades around the streams, a balance is proposed to minimize the potential
safety hazard created by excessively high walls.
The use of phasing and pod design also encourages smart erosion and
sediment control. The site will be developed in small sections, which will minimize
the sediment impact at any one time. Greater attention to maintaining erosion
controls can be given to the smaller phases as they are built, too.
Section 8: Mitigation
Approval from NCEEP of the mitigation required is attached. The project will use
the payment-in-lieu program for a total of 34,896 square feet: 21,709 SF in Zone 1
and 13,187 SF in Zone 2. The perennial stream impact is less than 150 linear feet,
so no stream mitigation is required. The buffer impacts that entail mitigation
include utility lines parallel to the stream that encroach into Zone 1 of the Neuse
buffers and fills related to road crossings. The total amount of mitigation required
(with multipliers) is 84,908 SF. The mitigation will be handled by "Payment into the
Riparian Buffer Restoration Fund."
Section 9: Environmental Documentation
No federal funds will be used, and no NEPA/SEPA documents are required.
Section 10: Proposed Impacts on Riparian and Watershed Buffers
(see Section 8 and Section 1 1)

The temporary level spreaders are labeled as follows: FES 9, FES 13, FES 55, FES 66,
and FES 72. A summary of the design is attached. A BMP Supplement is
attached. As the specific level spreader locations and grading has not been
determined yet, only the outfalls are shown. The design calculations are
included on the summary sheet. Review by the City of Durham will ensure the
level spreaders meet DWQ requirements.
Nitrogen treatment is not required, because the final site imperviousness will not
exceed 24 percent. The nitrogen loading rate is less than 3.6 pounds per acre
per year, based on the City of Durham's nitrogen loading calculation methods.
All buffers are shown on the plans, including 50' North Carolina Neuse Basin
buffers and 100' City of Durham perennial stream Neuse buffers.
Section 11: Stormwater
There is no existing impervious area on the site. The final built-out condition will
include up to 24 percent impervious area. Of the 422.60 acres, that amounts to
101.42 acres. The City of Durham is responsible for implementation and review of
all aspects of the Stormwater management plan, including adherence to the
Neuse Buffer rules (NSW) and water supply watershed rules (WS IV). The August
20, 2007 memorandum to this effect is attached. All construction document
approvals associated with the stormwater management plan will be forwarded
to NC DWQ upon receipt.
Level spreaders will be used at every outfall of each phase to provide diffuse
flow into the Neuse buffers, and detention basins will reduce post-development
peak flows to pre-development levels. The specific construction drawings of the
level spreaders is currently under review by the City of Durham. For this permit
application, a sheet labeled SW 1 has been included that shows typical details
of the bypass level spreaders that will be used to dissipate the flow from the
storm pipe system on site. As each phase or pod is developed and the relevant
storm piping installed, the pipes will discharge to a detention pond, which will
discharge to a level spreader. The temporary level spreaders installed before the
pods are developed will meet DWQ BMP Manual specifications - as if they were
permanent.
The only exception to the above is FES 96, which discharges to an existing man-
made conveyance, which was not constructed in violation of the Buffer Rules.
Section 12: Sewage Disposal
Sewerage generated by the proposed development will be piped into the City
of Durham sanitary sewer system and treated.

Section 13: Violations
This site is not in violation of DWQ Wetland Rules or any Buffer Rules.
Section 14: Cumulative Impacts
This project, based on past and reasonably anticipated future impacts, will not
result in additional development that could affect water quality.
Section 15: Other Circumstances
None.

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STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part lll) must be printed, filled out and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name Sierra
Contact name Horvath Associates, PA -John Schrum, PE
Phone number [phone]
Date December 14, 2007
Drainage area number (see drainage area map, 24"x26")
II. DESIGN INFORMATION
For Level Spreaders Receiving Flow From a BMP
Type of BMP Dry Detention basin (final buildout condition)
Drawdown flow from the BMP as designed cfs
Where Does the Level Spreader Discharge?
To a bioretention cell? N (Y or N)
To a wetland? N (Y or N)
To a filter strip or riparian buffer? Y (Y or N) Please complete filter strip characterization below.
Other (specify)
Filter Strip or Riparian Buffer Characterization (if a pplicable)
Width of grass 20 ft
Width of dense ground cover 0 ft
Width of wooded vegetation 30 ft
Total width 50 ft
Slope (from level lip to to top of bank) 6
Are any draws present? N (Y or N) OK
Level Spreader Design
Forebay surface area 0.2% of imperv, sq ft OK
Feet of level lip needed per cfs 44 ft/cfs
Answer "Y" to one of the following:
Length based on the 1 inmr storm? N (Y or N)
Length based on the 10-yr, 24-hr storm? N (Y or N)
Length based on the BMP discharge rate? Y (Y or N)
Design flow as designed cfs
Is a bypass device provided? Y (Y or N) OK
Length of the level lip as designed ft Level spreader may not be more than 130 feet long.
Are level spreaders in series? N (Y or N)
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland? N (Y or N)
Does the channel enter the stream at an angle? Y
Dimensions of the channel (see diagram below):
M ft
B ft
W ft
Peak velocity in the channel during the 10-yr, 24-hr storm as designed cfs
Form SW401-Level Spreader, Fitter Strip, Restored Riparian Buffer-Rev.3 Parts I. and II. Design Summary, page 1 of 3

Channel lining material riprap

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Form SW401-Level Spreader, Fitter Strip, Restored Riparian Buffer-Rev.3 Parts I. and II. Design Summary, page 2 of 3

III. REQUIRED ITEMS CHECKLIST
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
Initials Sheet No.
_SW2_ 1. Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build-out,
- Off-site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
-Forebay (if applicable),
-High flow bypass system,
- Maintenance access,
-Recorded drainage easement and public right of way (ROW), and
- Boundaries of drainage easement.
_SW1_ 2. Plan details (1" = 30' or larger) for the level spreader showing:
- Forebay (if applicable),
-High flow bypass system,
-One foot topo lines between the level lip and top of stream bank,
-Recorded drainage easement, and
- Design at ultimate build-out.
_SW1_ 3. Section view of the level spreader (1" = 20' or larger) showing:
- Underdrain system (if applicable),
- Level lip,
- Upslope channel, and
- Downslope filter fabric.
as designed 4. Adate-stamped photograph of the filter strip that clearly shows the type of vegetation that is present.
as designed 5. An assurance that the installed system will meet design specifications upon initial operation once the
project is complete and the entire drainage area is stabilized.
as designed 6. A construction sequence that shows how the level spreader will be protected from sediment until the entire
drainage area is stabilized.
as designed 7. The supporting calculations.
as designed 8. A copy of the signed and notarized inspection and maintenance (I&M) agreement.
as designed 9. A copy of the deed restriction.
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Part III, page 3 of 3

a
Level Spreaders Table Ben Thayer, EI
Level Spreader Summary 12/11/2007
Upstream Forebay Req'd Req'd Req'd
End Section Composite 1"/hr Flow
Area Invert (ft) Area (sq Length Length Length
~ Rational C (cfs)
(acres) ft) (forest) (grass) (hybrid)
FES9 6.37 0.69 4.41 360.11 560 287 57 194
FES 13 6.22 0.66 4.13 350.00 550 268 54 182
FES55 6.63 0.74 4.96 390.57 580 322 64 218
FES66 1.29 0.90 1.17 383.51 120 76 15 51
FES72 4.07 0.56 2.32 391.83 360 151 30 102
FES96 6.32 0.31 1.99 431.11 n/a n/a n/a n/a
Notes:
* FES96 is an existing twin 24" headwall.
* Forebay Area =Upstream Area * 0.002
* Minimum level spreader length is 30', and maximum length is 130'.
* Required filter strip length = 1 "/hr flow * (65 ft/cfs (forest) OR 13 ft/cfs (grass) OR 44 ft/cfs (hybrid))
* Hybrid filter strip assumes 20' grass, 30' forest (44 ft/cfs as specified in BMP Manual).
End Section

ID 10-Year

Flow Pipe
Diameter
(~) Pipe Slope

(ft/ft)

Length Velocity Dissipator

Width Depth
Stone
Class
FES9 30.81 30 0.019 20' 23' 24" Cl.l
FES 13 25.50 36 0.007 18' 21' 18" Cl. B
FES55 32.68 36 0.010 24' 27' 24" Cl.l
FES66 8.30 18 0.007 6' 8' 12" Cl. A
FES72 15.42 24 0.010 12' 19' 18" Cl. B
FES96 n/a 24x2 n/a n/a n/a n/a n/a
Notes:
* FES96 is an existing twin 24" headwall.
* See velocity dissipator design sheets for calculations.

~x.~ ~~-~~22
PAID
HORVATH
ASSOCIATES
CIVIL ENGINEERS PLANNERS LANDSCAPE ARCHITECTS ~~
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Sierra
NC DWQ Section 401 Express Review
Permit Application
North Carolina Tennessee
16 Consultant Place, Suite 201 537 Market Street Suite LL20
Durham, NC 27707 Chattanooga, TN 37402
p 919.490.4990 / f 919.490.8953 p 423.266.4990 / f 423.266.5700

•
Office Use Only: Form Version March OS
USAGE Action ID No. DWQ No. D ~ ' ~ O 2 ~
(If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".)
I. Processing
PAID
Check all of the approval(s) requested for this project:
^ Section 404 Permit ^ Riparian or Watershed Buffer Rules
^ Section 10 Permit ^ Isolated Wetland Permit from DWQ
^ 401 Water Quality Certification ® Express 401 Water Quality Certification
2. Nationwide, Regional or General Permit Number(s) Requested
NWP 29
If this notification is solely a courtesy copy because written approval for the 401 Certification
is not required, check here: ^
4. If payment into the North Carolina Ecosystem Enhancement Program (NCEEP) is proposed
for mitigation of impacts, attach the acceptance letter from NCEEP, complete section VIII,
and check here:
•
5. If your project is located in any of North Carolina's twenty coastal counties (listed on page
4), and the project is within a North Carolina Division of Coastal Management Area of
Environmental Concern (see the top of page 2 for further details), check here: ^
II. Applicant Information ~ jr? Lei ~~ ~ D
o v~
1. Owner/Applicant Information pEC 1~ 9 207
Name: Je Radman
Mailing Address: East Durham Land Com an LLC .Wn~~
201 Shannon Oaks Circle
Raleigh, NC 27511
Telephone Number: [phone] Fax Number: (919 465-3383
E-mail Address:
2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter
must be attached if the Agent has signatory authority for the owner/applicant.)
Name: John E. Schrum PE
Company Affiliation: Horvath Associates, P.A.
Mailing Address: 16 Consultant Place, Suite 201
Durham NC 27707
Telephone Number: [phone] Fax Number: [phone]
. E-mail Address: john.schrum(a~horvathassociates.com
Updated 11/1/2005
Page5of12

• III. Project Information
Attach a vicinity map clearly showing the location of the property with respect to local
landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property
boundaries and development plans in relation to surrounding properties. Both the vicinity map
and site plan must include a scale and north arrow. The specific footprints of all buildings,
impervious surfaces, or other facilities must be included. If possible, the maps and plans should
include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property
boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion,
so long as the property is clearly defined. For administrative and distribution purposes, the
USACE requires information to be submitted on sheets no larger than 11 by 17-inch format;
however, DWQ may accept paperwork of any size. DWQ prefers full-size construction
drawings rather than a sequential sheet version of the full-size plans. If full-size plans are
reduced to a small scale such that the final version is illegible, the applicant will be informed that
the project has been placed on hold until decipherable maps are provided.
1. Name of prof ect:
2. T.LP. Project Number or State Project Number (NCDOT Only): n/a
3. Property Identification Number (Tax PIN): (see attached vicinitymap for PINS)
4. Location
• County: Durham Nearest Town: Durham
Subdivision name (include phase/lot number): Sierra Infrastructure
Directions to site (include road numbers/names, landmarks, etc.): I-40 to I-540 to Exit 4B,
Glenwood Ave / US-70W After 3 4 miles turn right at Leesville Road, continue to 1.2
miles to intersection with Doc Nichols Road. Site may be accessed via either road, main
entrance is <1 mile ahead on Leesville Road left side. See attached vicinit~ap.
5. Site coordinates (For linear projects, such as a road or utility line, attach a sheet that
separately lists the coordinates for each crossing of a distinct waterbody.)
Decimal Degrees (6 digits minimum): 35.947903 °N 78.789466 °W
6. Property size (acres): 422.60 acres
7. Name of nearest receiving body of water: Lick Creek (27-11-(1.S~,Z(WS-IV; NSW, CA)
8. River Basin: Neuse River Basin NEU01
(Note -this must be one of North Carolina's seventeen designated major river basins. The
River Basin map is available at help://lj2c~.enr.slale.ne.u~/adlnin/l~a~.)
9. Describe the existing conditions on the site and general land use in the vicinity of the project
at the time of this application: The site is currently forested, undeveloped land. The
surrounding_area is primarily rural and suburban residential development.

Updated 11/1/2005
Page 6 of 12

10. Describe the overall project in detail, including the type of equipment to be used: The
overall project will consist of 369 single-family homes and 130 multi-family townhomes.
Equipment consistent with grading earthmoving_and paving will be used.
11. Explain the purpose of the proposed work: The purRose of the project is to provide safe
housing for homebuyers increase the tax base of the City of Durham, and populate this
r~g_region of eastern Durham
IV. Prior Project History
If jurisdictional determinations and/or permits have been requested and/or obtained for this
project (including all prior phases of the same subdivision) in the past, please explain. Include
the USACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
certifications or other useful information. Describe previously approved wetland, stream and
buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project,
list and describe permits issued for prior segments of the same T.I.P. project, along with
construction schedules. No prior permits have been requested. Buffer determinations NBR 06-
135 and 06-136 were obtained from NCDWQ. Copies are attached.
V. Future Project Plans
• Are any future permit requests anticipated for this project? If so, describe the anticipated work,
and provide justification for the exclusion of this work from the current application.
Future hermit requests are not antic_pated but may be submitted as part of future phases that
have not been designed vet
VI. Proposed Impacts to Waters of the United States/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
wetlands, open water, and stream channels associated with the project. Each impact must be
listed separately in the tables below (e.g., culvert installation should be listed separately from
riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts,
permanent and temporary, must be listed, and must be labeled and clearly identifiable on an
accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial)
should be shown on a delineation map, whether or not impacts are proposed to these systems.
Wetland and stream evaluation and delineation forms should be included as appropriate.
Photographs may be included at the applicant's discretion. If this proposed impact is strictly for
wetland or stream mitigation, list and describe the impact in Section VIII below. If additional
space is needed for listing or description, please attach a separate sheet.
1. Provide a written description of the proposed impacts: The proposed impacts include
two road crossings with culverts nine sanitary sewer crossings and two fill slope locations.
The impacts will be include stream impacts and Zones 1 and 2 buffer impacts. No wetland
• impacts are proposed Mitigation will be required for some of the impacts.
Updated 11/1/2005
Page 7 of 12

• 2. Individually list wetland impacts. Types of impacts include, but are not limited to
mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams,
ser,arately. list impacts due to both structure and flooding.
Wetland Impact

Site Number
(indicate on map)

Type of Impact Type of Wetland

(e.g., forested, marsh,
herbaceous, bog, etc.) Located within
100-year
Floodplain
(es/no) Distance to
Nearest
Stream
linear feet Area of
Impact
(acres)

Total Wetland Impact (acres) 0.0
3. List the total acreage (estimated) of all existing wetlands on the property: 20.47 acres

4. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary
impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam
construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib
walls, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed,
plans and profiles showing the linear footprint for both the original and relocated streams
m„st he included_ To calculate acreage. multiply length X width, then divide by 43,560.
Stream Impact
Number
(indicate on ma
Stream Name v
Type of Impact
Perennial or
Intermittent? Average
Stream Width
Before Im act Impact
Length
(linear feet) Area of
Impact
acres)
lA Earthquake Creek Road Crossing Intermittent 2.5 ft 134 0.008
4C Earthquake Creek Road Crossing Perenial 4.1 ft 146 0.014
1, 2A, 3, 4, 4B, 6 Earthquake Creek Utility Crossing Intermittent 2.2 ft 213 0.011
3A, 4, 4B, SA, 9 Earthquake Creek Temp Util. Crossing Perenial 7.1 142 (Temp) 0.023

Total Stream Impact (by length and acreage) 635 0.056
5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic
Ocean and any other water of the U.S.). Open water impacts include, but are not limited to
fill_ excavation_ dred~in~_ flooding. drainase, bulkheads, etc.
•
Open Water Impact
Site Number
indicate on ma) Name of Waterbody
(if applicable) ..
Type of Impact Type of Waterbody
(lake, pond, estuary, sound, bay,
ocean, etc.) Area of
Impact
(acres)

Total Open Water Impact (acres) 0.0
Updated 11/1/2005
Page 8 of 12

•
6. List the cumulative im act to all Waters of the U.S. resulting from the project:
Stream Impact (acres): 0.056
Wetland Impact (acres): 0.0
Open Water Impact (acres): 0.0
Total Impact to Waters of the U.S. (acres) 0.0
Total Stream Impact (linear feet): 286
7. Isolated Waters
Do any isolated waters exist on the property? ^ Yes ®No
Describe all impacts to isolated waters, and include the type of water (wetland or stream) and
the size of the proposed impact (acres or linear feet). Please note that this section only
applies to waters that have specifically been determined to be isolated by the USACE.
8. Pond Creation
If construction of a pond is proposed, associated wetland and stream impacts should be
included above in the wetland and stream impact sections. Also, the proposed pond should
be described here and illustrated on any maps included with this application.
Pond to be created in (check all that apply): ®uplands ^ stream ^ wetlands
Describe the method of construction (e.g., dam/embankment, excavation, installation of
draw-down valve or spillway, etc.): dam/embankment and excavation
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.): 1-.peak flow
• Current land use in the vicinity of the pond: undeveloped
Size of watershed draining to pond: Expected pond surface area:
*Note: Basins will be designed with phases and are not included in the scope of this design.
VII. Impact Justification (Avoidance and Minimization)
Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide
information related to site constraints such as topography, building ordinances, accessibility, and
financial viability of the project. The applicant may attach drawings of alternative, lower-impact
site layouts, and explain why these design options were not feasible. Also discuss how impacts
were minimized once the desired site plan was developed. If applicable, discuss construction
techniques to be followed during construction to reduce impacts. Extensive avoidance and
minimization techniques are practiced throughout the site. All wetland impacts will be avoided.
Phased development clusters including single- and multi-family homes, are located between
Neuse-buffered streams At the road crossings headwalls will limit the length of the culverts,
and the culverts are designed to match the existing stream profiles in order to reduce the length
of the required riprap dissipators Jack and bore techniques will be used to reduce the impacts of
utility line crossings All unnecessary crossings were avoided in desi~nin~ the site.
VIII. Mitigation
DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC
Division of Water Quality for projects involving greater than or equal to one acre of impacts to
•
Updated 11/1/2005
Page 9 of 12

• freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial
streams.
USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide
Permits, published in the Federal Register on January 15, 2002, mitigation will be required when
necessary to ensure that adverse effects to the aquatic environment are minimal. Factors
including size and type of proposed impact and function and relative value of the impacted
aquatic resource will be considered in determining acceptability of appropriate and practicable
mitigation as proposed. Examples of mitigation that may be appropriate and practicable include,
but are not limited to: reducing the size of the project; establishing and maintaining wetland
and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of
aquatic resource functions and values by creating, restoring, enhancing, or preserving similar
functions and values, preferable in the same watershed.
If mitigation is required for this project, a copy of the mitigation plan must be attached in order
for USACE or DWQ to consider the application complete for processing. Any application
lacking a required mitigation plan or NCEEP concurrence shall be placed on hold as incomplete.
An applicant may also choose to review the current guidelines for stream restoration in DWQ's
Draft Technical Guide for Stream Work in North Carolina (see DWQ website for most current
version.).
1. Provide a brief description of the proposed mitigation plan. The description should provide
as much information as possible, including, but not limited to: site location (attach directions
• and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet)
of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view,
preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a
description of the current site conditions and proposed method of construction. Please attach
a separate sheet if more space is needed.
Mitigation will be provided through payment-in-lieu pro>?ram with NCEEP (see below).
2. Mitigation may also be made by payment into the North Carolina Ecosystem Enhancement
Program (NCEEP). Please note it is the applicant's responsibility to contact the NCEEP at
[phone] to determine availability, and written approval from the NCEEP indicating
that they are will to accept payment for the mitigation must be attached to this form. For
additional information regarding the application process for the NCEEP, check the NCEEP
website at http'//www.nceeg.net/~~es/inlieurc»lace.htm. If use of the NCEEP is proposed,
please check the appropriate box on page five and provide the following information:
Amount of stream mitigation requested (linear feet): 0 LF
Amount of buffer mitigation requested (square feet): 34,896 SF
Amount of Riparian wetland mitigation requested (acres): 0 acres
Amount ofNon-riparian wetland mitigation requested (acres): 0 acres
Amount of Coastal wetland mitigation requested (acres): 0 acres
•
Updated 11/1/2005
Page 10 of 12

IX. Environmental Documentation (required by DWQ)
1. Does the project involve an expenditure of public (federal/state/local) funds or the use of
public (federal/state) land? Yes ^ No
2. If yes, does the project require preparation of an environmental document pursuant to the
requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)?
Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA
coordinator at [phone] to review current thresholds for environmental documentation.
Yes ^ No
3. If yes, has the document review been finalized by the State Clearinghouse? If so, please
attach a copy of the NEPA or SEPA final approval letter. Yes ^ No ^
X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ)
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
required state and local buffers associated with the project. The applicant must also provide
justification for these impacts in Section VII above. All proposed impacts must be listed herein,
and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a
map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ
Regional Office may be included as appropriate. Photographs may also be included at the
applicant's discretion.
1. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233
(Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC
2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please
identify )? Yes ® No ^
2. If "yes", identify the square feet and acreage of impact to each zone of the riparian buffers.
If buffer mitigation is required calculate the required amount of mitigation by applying the
buffer multipliers.
Zone* Impact
(s ware feet) Multiplier Required
Miti ation
1 21,709 3 (2 for Catawba) 65,127
2 13,187 1.5 19,781
Total I 34,896 I I 84,908
* Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an
additiona120 feet from the edge of Zone 1.
3. If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e.,
Donation of Property, Riparian Buffer Restoration /Enhancement, or Payment into the
Riparian Buffer Restoration Fund). Please attach all appropriate information as identified
within 15A NCAC 2B .0242 or .0244, or .0260. For the mitigation required, payment into
the Riparian Buffer Restoration Fund is proRosed (see attached). Mitigation includes impacts
from road crossings fill and utilit l~parallel to the stream in Zone 1 Meuse buffers.
Updated 11/1/2005
Page 11 of 12

. XI. Stormwater (required by DWQ)
Describe impervious acreage (existing and proposed) versus total acreage on the site. Discuss
stormwater controls proposed in order to protect surface waters and wetlands downstream from
the property. If percent impervious surface exceeds 20%, please provide calculations
demonstrating total proposed impervious level. There is no existing impervious area. Proposed
maximum built-out impervious is 24% of 422 60 acres which is 101.42 acres. All stormwater
discharges will be diffuse flow and beak post-development flows will match pre-development.
XII. Sewage Disposal (required by DWQ)
Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of
wastewater generated from the proposed project, or available capacity of the subject facility.
Sewerage generated by the proposed project will be piped to the City of Durham sanitary sewer
system and treated
XIII. Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules?
Yes ^ No
Is this an after-the-fact permit application? Yes ^ No
• XIV. Cumulative Impacts (required by DWQ)
Will this project (based on past and reasonably anticipated future impacts) result in additional
development, which could impact nearby downstream water quality? Yes ^ No
If yes, please submit a qualitative or quantitative cumulative impact analysis in accordance with
the most recent North Carolina Division of Water Quality policy posted on our website at
http://h2®.c~~r,state,ne.~ls/neyyetlands. If no, please provide a short narrative description: The
project will include future phases that have not been designed vet but the future phases will use
the current proposed road crossings for access thereby avoiding future impacts.
XV. Other Circumstances (Optional):
It is the applicant's responsibility to submit the application sufficiently in advance of desired
construction dates to allow processing time for these permits. However, an applicant may
choose to list constraints associated with construction or sequencing that may impose limits on
work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and
Threatened Species, accessibility problems, or other issues outside of the applicant's control).
A licant/Agent's Signature at
• (Agent's s nature is valid only if an authorization letter from the applicant is provided.)
Updated 11/1/2005
Page 12 of 12

o~~F W a r~RQr,
~ ~ ~
mac`
December 4, 2007
EXPRESS REVIEW ACCEPTANCE LETTER
East Durham Development Company, LLC
Attn: Mr. Michael Whitehead
201 Shannon Oaks Circle
Raleigh, NC 27511
Project Name: Sierra Subdivision
Dear Mr. Whitehead:
Coleen H. Sullins, Director
Division of Water Quality
Durham County
On November 28, 2007, the 401 OversighdExpress Permitting Unit of the Division of Water Quality received a
request from Mr. John Schrum of Horvath Associates, regarding a project known as "Sierra" for acceptance into
the Express Review Program. This letter advises you that your project will be accepted into the Express Review
Program once the following items are received:
•
1) The application fee of $4,000.00 [for 401 Water Quality Certification with major impacts ($2,000) +
Riparian Buffer Authorization ($2,000)], made payable to the North Carolina Division of Water Quality];
2) Five (5) complete and collated copies of the PCN Application;
3) One (1) copy of the completed PCN Addendum
(httlp://h2o.enr.state.nc.us/ncwetlands/documents/MicrosoftWord-
PCN Addendum 10 Ol 06 OOO.pdf);
4) Five (5) copies of all.site plan information pertaining to this project (refer to the PCN Addendum); and
5) Three (3) copies of the BMP supplements and details for on-site diffuse flow provisions (refer to
http://h2o.enr.state.nc.us/su/bmp forms.htm); and
6) One (1) copy of the City of Durham approved stormwater management plan (this can be the plan submitted
for preliminary approval if final approval has not yet been achieved).
Thank you for your attention to this matter. The clock for this project will not start until receipt of the completed
application package and required fee are received. If the impacts are greater than indicated on the Initial Interest
Form and/or the services are different, you may be required to remit an additional fee. If you have any questions
or wish to discuss these matters further please do not hesitate to call Lia Myott at 919-733-9502 or Joseph Gyamfi
at 919-715-3473.
Sincerely,
Cyndi Karoly, S ervisor
401/Express Review Oversite Unit
CBK/lem
cc: File copy
Mr. John E. Schrum, Horvath Associates P.A., 16 Consultant Place, Suite 201, Durham, NC 27707
• NoithCarolina
401 Oversight! Express Review Permitting Unit ~aturalllf
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] FAX [phone] Internet: htta://h2o.enr.state.nc.us/ncwetlands
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
An Equal OpportunitylAffirmative Action Employer- 50% Recycled/10% Post Consumer Paper

'- 'l AGENT AUTHORIZATION FORM
Name: Jerry Radman
Company: East Durham Land Company. LLC
~~~~'~"<~'''~"" Address: 201 Shannon Oats Circle
~~r,~~«:~~ ~~.~_,~~~.~ Raleigh. NC
Phone: [phone]
Project: Sierra
Location: Durham North Carolina
HA Job #: 0738
To ~~4rhom It May Concern:
1, the applicant, hereby designate and authorize Horvath Associates, P.A. to act on my behalf as
my agent in the processing of permit applications and to furnish upon request supplemental
information in support of applications. from this day forward for the above named project.
I certify that I am a responsible officer, partner, or owmer of the company. This signature
certifies that the applicant has title to the property or has been authorized by the otiiner to apply
for certification. Said agent in signing the application shall also certify that a[l information
contained therein or in support thereof is true and correct to the best of hislher knowledge.
This notification supercedes any previous correspondence concerning the agent for this project.
Print Applicant's Name
11,1 • ~~
Applicant's Signatur~t~G1~QA1a-'
(Y1~-trB-~-
tz o,~ a
Date
~ Gaofrw
! 6 Corta~ont Pfoce. Sine 201
D~tttors+4 NC 27)07
p 9 i 9-~t94~990 t 9P 9-~9~$953
•
Tennessee
537 NFart~ SikeEt. Se~d'e rr.2o
CtiofPoraooga~ 1Tt 3702
p 423264940 E X23266-57fl0

EAST DURHAM LAND COMPANY, LLC
..
12/04/2007 20071204 4.000.00 0.00
•
CHECK: 003018 12/06/2007 NC DIVISION OF WATER QUALITY T 0 T A L
EAST DURHAM LAND COMPANY, LLC CARYNNCU2 511
201 SHANNON OAKS CIRCLE • SUITE 201
CARY, NORTH CAROLINA 27511 66-46/531
*FOUR THOUSAND AND XX / 100
PAY
NC DIVISION OF WATER QUALITY
T
O R ,
~OF
3 0001456
~Ul~
4.000.00
4,000.00
3018
003018
DATE CHECK AMOUNT
12/06/2007 *****4,000.00*

~;
•

•
SIERRA
SECTION 401 PERMIT NARRATIVE
SIERRA
Doc Nichols Road and Leesville Road
Durham, North Carolina
Horvath Associates Project No.: 0713
December 19, 2007

Prepared for: MacGregor Development Company
201 Shannon Oaks Circle, Suite 201
Cary, North Carolina 27511
[phone]
Prepared by: Horvath Associates, P.A.
Engineers -Planners -Landscape Architects
P.O. Box 51806
Durham, North Carolina 27717
[phone]

• Section 13: Violations
This site is not in violation of DWQ Wetland Rules or any Buffer Rules.
Section 14: Cumulative Impacts
This project, based on past and reasonably anticipated future impacts, will not
result in additional development that could affect water quality.
Section 15: Other Circumstances
None.
•
•

•
Project: Sierra
•
~~ ~Fccyp{~~si~step m y
PROGRAM E
December 11, 2007

Expiration of Acceptance: June 13, 2007
Jerry Rodman
East Durham Land Co., LLC
201 Shannon Oaks Circle
Raleigh, NC 27511
County: Durham
We have received your request to access the North Carolina Ecosystem Enhancement Program's (NCEEP) In-Lieu Fee
mitigation program for the above referenced project. We regret that we are unable to accept the full amount of credit
requested at this time. This letter constitutes an acceptance of a portion of the mitigatio.~ you have requested.
EEP recently proposed a revision to the fee schedule for wetland and stream mitigation as a means of allowing the program
to collect fees commensurate with our project implementation costs. The revision was passed by the Environmental
Management Commission and Rules Review Commission but has been delayed due to administrative rules regarding
comment submittals. Per established protocols for rule-making, the fee revision will now be considered during the next
legislative session beginning in May 200$. Until that time, EEP has developed a strategy that considers the financial
implications to the program for new requests to access the In-Lieu Fee Program and has determined that we are only able to
accept a portion of your mitigation request at this time. If you want to resubmit your request form at a later, time, EEP will
reconsider the request in the future. We anticipate updating our strategy as new data and opportunities become available.
EEP will consider all requests on a case-by- case basis.
Based on the information supplied by you the impacts that may require compensatory mitigation are summarized in the
following table.
Neuse
03020201 Stream (feet) Wetlands (acres) Buffer I
(Sq. Ft.) Suffer II
(Sq. Ft.}
Cold Cool Warm Ri avian Non-Ri avian Coastal Marsh
Impacts Requested 0 0 154 0 0 0 29,020 9,965
Impacts Accepted 0 0 0 0 0 0 29,020 9,965
Credits 0 0 0 0 0 0 87,060 14,948
EEP is wilting to accept payment for impacts associated with the above referenced project as indicated in the table above.
Please note that this decision does not assure that the payment will be approved by the permit issuing agencies as mitigation
for project impacts. I[ is the responsibility of the applicant to contact these agencies to determine if payment to the NCEEP
will be approved.
This acceptance is valid for six months from the date of this letter and is not transferable. If we have not received a copy of
the issued 404 Permit/401 Certification/CAMA permit within this time frame, this acceptance will expire. It is the
applicant's responsibility to send copies of the permits to NCEEP. Once NCEEP receives a copy of the permit(s) an invoice
will be issued based on the required mitigation in that permit and payment must be made prior to conducting the authorized
work. The amount of the In Lieu Fee to be paid to NCEEP by an applicant is calculated based upon the Fee Schedule and
policies listed at www.nceep.net.
Upon receipt of payment, EEP will take responsibility for providing the compensatory mitigation. If the regulatory agencies
require mitigation credits greater than indicated above, and the applicant wants NCEEP to be responsible for the additional
mitigation, the applicant will need to submit a mitigation request to NCEEP for approval prior to permit issuance. The
mitigation will be performed in accordance with the Memorandum of Understanding between the N. C. Department of
Environment and Natural Resources and the U. S. Army Corps of Engineers dated November 4, 1998. ~~ A
RP.StOYGK~....~ ~ ... PYOt~ Ou,Y Stutz ~'pE~R
North Carolina Ecosystem Enhancement Program, 1852 Mail Service Center, Raleigh, NC 27699-1652 / 919-715-0476 / www.nceep.net

•
If you have any questions or need additional information, please contact Kelly Williams at [phone].
Sincerely,
William D. Gilmore, PE
Director
cc: Cyndi Karoly, NCDWQ Wetlandsl4U1 Unit
Eric Alsmeyer, USACE-Raleigh
Any Chapman, NCDWQ Wetlands/401 Unit
John Schrum, agent
File
•
RP.st~orr,~t~... ~' ... Prot~~cttn9 Ou.Y Sta.
R
North Carolina Ecosystem Enhancement Program, 1652 Mail Service Center, Raleigh, NC 27699-1652 / 919.715-0476 / www.nceep.net

•

•
SOILS MAP 28
SOILS MAP 33
5 l TE
•
N
.. .............................................................................
DRAWN BY:
HORVATH DURHAM COUNTY SOILS MAPS 28 & 33 CHECKEDgBFT
ASSOCIATE S
16 CONSULTANT PLACE, SURE 201 SCALE
DURHAM, NORTH CAROLINA 27707 SIERRA
P 919.490.4990 f 919.490.8953 ~ ~~-~ ~~
DATE
531 MARKET STREET, SURE LL20 DOC NICHOLS RD AND LEESVILLE RD 11-15-2007
CHATTANOOGA, TENNESSEE 37402
P 423.266.4990 F423.266.5700 PROJECT NO
www.horvalhassociates.com DURHAM, NORTH CAROLINA 0713

•
PIN: 0860-03-33-3314 PID: 193344
PIN: 0860-O1-20-8767 PID: 193361
PIN :0769-01-28-5772 P I D: 193301
PIN :0769-01-27-6679 PID: 203869
•
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•

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IMPACT MAPS
LEESVILLE ROAD AND DOC NICHOLS ROAD
DURHAM, NORTH CAROLINA
WAKE FOREST HWY. (NC 98 )
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DEVELOPMENT SUMMARY
DEVELOPER SITE DATA LEGEND
EAST DURHAM LAND COMPANY, LLC TOTAL LAND AREA: AC or SF
ZONING: PDR 3.0 CH: STREAM CHANNEL
MIKE WHITEHEAD
NC PROPOSED U
CARY SE: RESIDENTIAL NB: NEUSE RIVER BASIN BUFFER
,
[phone] EXISTING USE : VACANT WL: WETLAND
'
RIVER BASIN: NEUSE RIVER (F-J/B) Z1: FROM TOP OF BANK)
ZONE 1 (30
Z2: ZONE 2 (20' FROM ZONE 1)
Proj #
HORVATH ASSOCIATES, P.A. PROJECT COVER SHEET
~~ 0713
16 CONSULTANT PLACE, SUITE 201
2
7
7
Sierra Drwn By: JC Dwg NO
DURHAM, NORTH CAROLINA
7
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www.horvathassociates.com
Durham, North Carolina
Scale: 1"- N/A ~ of

0713 Section 401 Impact Summary
Overall Impact Summary
• Stream Impacts:
Intermittent Perennial Total
NWP 29 Stream Impact: 347 288 635 linear feet
•
Horvath Associates
12/17/2007

Impact
Stream
Type of Perennial

Comment
Impact
Impact
# Name Impact or Length (If) Area (sf)
Intermittent
1 A Earthquake Culvert Intermittent w/ 134 341
Creek Dissi ator
4C Earthquake Culvert Perennial w/ 146 594
Creek Dissi ator

1 Earthquake Utility
Intermittent S/S open
34
68
Creek Crossin cut

2A Earthquake Utility
Intermittent S/S open
31
82
Creek Crossin cut

3 Earthquake Utility
Intermittent S/S open
33
77
Creek Crossin cut

3A Earthquake Utility
Perennial Jack and
45
160
Creek Crossin bore

4 Earthquake Utility
Intermittent S/S open
31
63
Creek Crossin cut

4 Earthquake Utility
Perennial Jack and
33
130
Creek Crossin bore

46 Earthquake Utility
Intermittent S/S open
45
98
Creek Crossin cut

5A Earthquake Utility
Perennial Jack and
32
139
Creek Crossin bore

b Earthquake Utility
Intermittent S/S open
39
78
Creek Crossin cut

9 Earthquake Utility
Perennial Jack and
32
586
Creek Crossin bore

0713 Section 401 Impact Summary
Overall Impact Summary
• Buffer Impacts:
[sq. feet] [acres]
Total Zone 1 Impacts:
Total Zone 2 Impacts:
Total Buffer Impacts:
•
•
43,730 1.004
80,699 1.853
124,429 2.856
Horvath Associates
12/16/2007
Impact Zone 1 Impact Zone 2 Impact Total Impact
1 2,417 sq. feet 1,935 sq. feet 4,352 sq. feet
0.055 acres 0.044 acres 0.100 acres
1 A 8,043 sq. feet 4,111 sq. feet 12,154 sq. feet
0.185 acres 0.094 acres 0.279 acres
2 2,602 sq. feet 15,768 sq. feet 18,370 sq. feet
0.060 acres 0.362 acres 0.422 acres
2A 1,952 sq. feet 725 sq. feet 2,677 sq. feet
0.045 acres 0.017 acres 0.061 acres
3 2,564 sq. feet 5,189 sq. feet 7,753 sq. feet
0.059 acres 0.119 acres 0.178 acres
3A 2,588 sq. feet 185 sq. feet 2,773 sq. feet
0.059 acres 0.004 acres 0.064 acres
3B 0 sq. feet 3,567 sq. feet 3,567 sq. feet
0.000 acres 0.082 acres 0.082 acres
4 3,913 sq. feet 5,124 sq. feet 9,037 sq. feet
0.090 acres 0.118 acres 0.207 acres
4A 0 sq. feet 2,105 sq. feet 2,105 sq. feet
0.000 acres 0.048 acres 0.048 acres
46 2,937 sq. feet 2,190 sq. feet 5,127 sq. feet
0.067 acres 0.050 acres 0.118 acres
4C 9,445 sq. feet 5,564 sq. feet 15,009 sq. feet
0.217 acres 0.128 acres 0.345 acres
5 0 sq. feet 2,429 sq. feet ~ 2,429 sq. feet
0.000 acres 0.056 acres 0.056 acres
5A 2,152 sq. feet 10,295 sq. feet 12,447 sq. feet
0.049 acres 0.236 acres 0.286 acres
6 2,206 sq. feet 11,571 sq. feet 13,777 sq. feet
0.051 acres 0.266 acres 0.316 acres
7 0 sq. feet 1,590 sq. feet 1,590 sq. feet
0.000 acres 0.037 acres 0.037 acres
8 0 sq. feet 3,588 sq. feet 3,588 s .feet
0.000 acres 0.082 acres 0.082 acres
9 1,891 sq. feet 1,251 sq. feet 3,142 sq. feet
0.043 acres 0.029 acres 0.072 acres
11 71 sq. feet 1,332 sq. feet 1,403 sq. feet
0.002 acres 0.031 acres 0.032 acres
12 949 sq. feet 2,180 sq. feet 3,129 sq. feet
0.022 acres 0.050 acres 0.072 acres

1 ~ ~ ~ ,- t .__ _ -_ _..
~~.
..
~ ~~ `,SEE SHEET #22
' '.. FOR IMPACTS SEE SHEET #23
'"~"-~- ~ ; ~ r ~ .IMPACT 9) FOR IMPACTS
- ., ~ ,-
- SEE SHEET #8 (IMPACT 11)
.;, ' -'~- ~ ~ SEE SHEET #6 SEE SHEET #3
/ _ ` , FOR IMPACTS ,,,,-''~'
~'' ~ - - _ FOR IMPACTS FOR IMPACTS
(IMPACT 3, 3A AN f'~
;,~ ~'~';', (IMPACT 2 AND A) (IMPACT 1 AND 1 A)
''~~ ,,. r
.% .;,
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'~ ~' ...
'•;-~-~''~ ~ ,, ~'`~ __ SEE SHEET #21 -'~ -
`;r ~~ ~---'' ;;',~ FOR IMPACTS i
~'~ ~ l (IMPACT 8) ~ ~ ,.
,,
,~
-a
'~ ~'~~ SEE SHEET #20
~ ,,
"`~ '" =~~' FOR IMPACTS
I~r .%~' : ~'~ ' ~; ., (IMPACT 7 AND 8) %- SEE SHEET #24
~ ~ _~ FOR IMPACTS
/ ~,~ ; ' - ~~ '~., (IMPACT 12)
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SE jSHEET #17 _. ~~ ~, FOR IMPACTS
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HORVATH ASSOCIATES, P.A. OVERALL SITE MAP Proj #
16 coNSULTANr PLACE, suITE 201 0713 WETLAND DELINEATION PREPARED BY S&EC, INC, SURVEYED
DURHAM, NORTH CAROLINA 27707 Sierra Drwn By: JC Dwg No BY MSS LAND CONSULTANTS AND APPROVED BY THE RALEIGH
P 919.490.4990 F 919.490.8953 Leesville & Doc Nichols Rd cnk B : JR 2 REGULATORY FIELD OFFICE ON 28 SEPTEMBER 2005.
Date: 11/21/07
www.horvathassociates.com Durham, North Carolina Scale: 1"- soo~ 2 of

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CH ONLY
Buffer & NB Z 1 2,417 34'
Stream Z2 1,935 ----
(Sanitary
Sewer) TOTAL 4,352
1A NB Z1 8,043 134'
Buffer & Z2 4,111 ----
Stream
(Culvert) TOTAL 12,154
HORVATH ASSOCIATES, P.A. IMPACT MAP # 1 Proj #
0713
16 CONSULTANT PLACE, SUITE 201 Drwn By: JC Dwg No
DURHAM, NORTH CAROLINA 27707 Sierra
P 919.490.4990 F 919.490.8953 Leesville & Doc Nichols R cnk B JR 3
Date: 11/21/07
www.horvathassociates.com Durham, North Carolina Scale: 1"- loo' 3 of

a_
C
Z
370
360
350
c
c
~ SANITARY SEWER PROFILE
7 SCALE P'=50'
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HORVATH ASSOCIATES, P.A.
16 CONSULTANT PLACE, SUITE 201
DURHAM, NORTH CAROLINA 27707
P 919.490.4990 F 919.490.8953
www.horvathassocfates.com
10+50 11+00
EXISTING GRADE
25' LEFT OF CENTERLINE
' EXISTING GRADE
CENTERLINE
-EXISTING GRADE
25' RIGHT OF CENTERLINE
IMPACT PROFILE Proj #
0713
Sierra Drwn By: JC Dwg No
h
l
R
Ni
& D
ill
L Chk B : JR 7
o
s
oc
c
eesv
e Date: 11/21/07
Durham, North Carolina Scale: 1"- so' 3 of

SANITARY SEWERS INSTALLED UNDER
PERENNIAL STREAMS WILL BE INSTALLED
USING THE'JACK AND BORE' METHOD TO
AVOID STREAM IMPACTS
SEE SHT 9
FOR PROFILE
IMPACT \
AREA #3B .~

SEE SHT 9
FOR PROFILE
IMPACT \
AREA #3 ~t
'' ~~_
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HORVATH ASSOCIATES, P.A.
' 16 CONSULTANT PLACE, SUITE 201
" " DURHAM, NORTH CAROLINA 27707
P 919.490.4990 F 919.490.8953
www.horvathassociates.com
IMPACT TYPE SO. FT. LINEAR FT.
N0. (CH and WL) CH ONLY
Buffer NB Z1 2,564 ----
Only ZZ 5,189 ----
(Sanitary
Sewer) TOTAL 7,753
3A
Buffer &
NB Z1
2,588
----
Stream Z2 185 ----
(Sanitary
Sewer) TOTAL 2,773
36 NB

Buffer Z1
----
----
Only 12 3,567 ----
(SanitOry
Sewer) TOTAL 3,567
OVERALL SITE MAP ~ ~-'
0713
Sierra Drwn By: JC Dwg No
h
l
R
Ni
& D
ill Chk B : JR 8
o
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Leesv
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Durham, North Carolina s~aie: 1"-100' 3 of

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EXISTING GRADE
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EXISTING GRADE
25' RIGHT OF CENTERLINE

DATUdf ELEV
335.00
10+00 10+50 10+00 10+50 tt+00
~ SANITARY SEWER PROFILE z SANITARY SEWER PROFILE
9 scn~ r'=sa 9 scnLe i°=so'
HORVATH ASSOCIATES, P.A. IMPACT PROFILES Proj #
0713
16 CONSULTANT PLACE, SUITE 201 DrWn By: JC Dwg No
DURHAM, NORTH CAROLINA 27707 Sierra
P 919.490.4990 F 919.490.8953 Leesville & Doc Nichols R Chk B JR 9
Date: 11/21/07
www.horvathassociates.com Durham, North Carolina Scale: 1"- 50' 3 of

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16 CONSULTANT PLACE, SUITE 201
DURHAM, NORTH CAROLINA 27707
P 919.490.4990 F 919.490.8953
~'
www.horvathassociates.com
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4
Buffer &
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3,913
31' (INTER.)
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TOTAL
9,037
31~ (TOTAL)
4A
NB
Buffer Z1 ---- ----
Only Z2 2,105 ----
Sanitary
ewer)
TOTAL
2,105
Buffe & NB Z1 2.937 45'
Stream Z2 2,190 ----
Sanitary
ewer) TOTAL 5,127
NB Z1 445
9 146'
Buffer & ,
Stream Z2 5,564 ----
(Culvert) TOTAL 15,009
OVERALL SITE MAP Proj #
0713
Sierra Drwn By: JC Dwg No
l
R
Ni
h
& D
ill Chk B : JR 10
s
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Leesv Date: 11/21/07
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HORVATH ASSOCIATES, P.A. IMPACT PROFILE
0713
16 CONSULTANT PLACE, SUITE 201
Sierra DrWn By: JC Dwg No
DURHAM, NORTH CAROLINA 27707
490
8953
4990 F 919
490
P 919 l
R
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& D
ill Chk B JR 1 1
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.
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Leesv
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"sue
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-~0
O
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(~7
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EXISTING GRADE
25' RIGHT OF CENTERLINE
~ SANITARY SEWER PROFILE
Z SCALE 1"=50'
HORVATH ASSOCIATES, P.A. IMPACT PROFILE Proj #
0713
16 CONSULTANT PLACE, SUITE 201 Drwn By: JC Dwg No
DURHAM, NORTH CAROLINA 27707 Sierra
P 919.490.4990 F 919.490.8953 Leesville & Doc Nichols R Chk B : JR 12
Date: 11/21/07
www.horvathassociates.com Durham, North Carolina Scale: 1"= so' 3 of
10+00 10+50

360
4' HIGH PVC COAI
CHAIN LINK FENCE
(FOREST GREEN OF
HEA
340
330
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320.00
350
GRADE
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i VE
TOR
G GI
45Lx 57'Wx 24"D PLUNGE
POOL Vt30CiTY DISSIPATOR
NCDOT CLASS 1 RIPRAP
~ CULVERT PROFILE
13 scnL~: i°=sa
10+00 10+50 11+00 11+50
HORVATH ASSOCIATES, P.A. IMPACT PROFILE Proj #
0713
16 CONSULTANT PLACE, SUITE 201 Drwn By: JC Dwg No
_, • DURHAM, NORTH CAROLINA 27707 Sierra
5, P 919.490.4990 F 919.490.8953 C h k B J R 13
Leesville & Doc Nichols R
Date: 11/21/07
www.horvathassociates.com Durham, North Carolina Scale: 1"- 50' 3 of

_i ~ i ~
~ F .. i --
~' ~ `Y 30'PUBLIC SA NRARY _-~'' ~ ~ rr~ ~~' ~ /
• ` SEW ER EASEMENT ,,~---~~~ ~ ,/ ~ ~~i ; ~1
\~.a --- -~ ~~/ .'~~,/ / / %rn ../ '~ }'+ 4.54
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~ \ / I , ; ` -
,~ '•. ~
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o . ~:
ICn ~ ~ ZONE'r
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iU IMPACT ~ ~ . ^`~'zoNE2 p_p ~ •
SANITARY SEWERS INST L D NDER AREA #5 ~ \ ~ ~0g
PERENNIAL STREAMS W L E I STALLED ~ ~ -__ -
E E SEWERBEASEMEM RY `` ------~-L}-~--
USING THE JACK AND O E ETHOD TO
AVOID STREAM IMPAC S = IMPACT
AREA #4C
I
~`
,`~ ' {
0
0
,~~
8~
aq
1
IMPACT TYPE S0. FT. LINEAR FT.
N0. (CH and WL) CH ONLY
Buffer & NB Z1 9,445 146'
Stream Z2 5,564 ----
(Culvert) TOTAL 15,009
5
Buffer
NB Z1
----
----
Only Z2 2,429 ----
Sanitary
ewer)
TOTAL
2,429
5A
Buffer &
NB Z1
2,152
----
Stream Z2 10,295 ----
(Sanitary
Sewer) TOTAL 12,447
___
HORVATH ASSOCIATES, P.A. OVERALL SITE MAP Proj #
0713
16 CONSULTANT PLACE, SUITE 201 Drwn By: JC Dwg No
DURHAM, NORTH CAROLINA 27707 Sierra
P 919.490.4990 F 919.490.8953 Leesville & Doc Nichols R Chk B JR 14
Date: 11/21/07
www.horvathassociates.com Durham, North Carolina Scale: 1"- 100' 3 of

DUCTILE IRON
PIPE REQUIRED
F CK-
R A INT
L AERIEL
/ CROSSING - P ITY F DURHAM
\ STANDARDS
-

64 L @ 0
20%

\ _ . 71 LF
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15 scA e i°=so•
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HORVATH ASSOCIATES, P.A. IMPACT PROFILE Proj #
0713
16 CONSULTANT PLACE, SUITE 201
DURHAM
NORTH CAROLINA 27707
Sierra Drwn By: JC Dwg No
,
P 919.490.4990 F 919.490.8953 Leesville & Doc Nichols R Chk B JR 15
Date: 11/21/07
www.horvathassociates.com Durham, North Carolina Scal
1 "= so' 3 of
e:

a.
v
v
xx
O ~~N
ISM h~~MCNj
P 7 } O ~
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EXISTING GRADE
CENTERLINE
\
~
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EXISTING GRADE
25' RIGHT OF CENTERLINE

~`
330

60 LF @ 1.05%
8"0 PVC
320
DATUA! ELEV
315. 0
ry m o 0
~O P ~
M M N N
M M M M
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~ SANITARY SEWER PROFILE
16 scn~ r'=sa
Proj #
HORVATH ASSOCIATES, P.A. IMPACT PROFILE
0713
16 CONSULTANT PLACE, SUITE 201
27707
Sierra Drwn By: JC Dwg No
DURHAM, NORTH CAROLINA
490.4990 F 919.490.8953
P 919 I
R
h
N
II
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L Chk B JR 16
. IC
O
S
OC
eeSVI
e Date: 11/21/07
www.horvathassociates.com Durham, North Carolina Scale: 1"= so' 3 of

..
..
SANITARY SEWERS INSTALLED UNDER /~
PERENNIAL STREAMS WILL BE INSTALLED ~ ~ j
USING THE'JACK AND BORE' METHOD TO ~ ~ ' '
AVOID STREAM IMPACTS ; ~ /. ~I ; I
I
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.-~
,~'
,,
,-
~~,~ ~- _
1
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~ _______
\ TT\ , ~' ~
,
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AREA #5A
IMPACT
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(CH and WL) LINEAR ~f.
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5A NB Z1 152
2 ----
Buffer
Only
Z2 ,
10,295
----
(Sanit
ry TOTAL 12,447
j
Sewer
NB
1
Buffer Z 2,206 ----
Only Z2 11,571 ----
(Sonitary TOTAL 13,777
Sewer
HORVATH ASSOCIATES, P.A. OVERALL SITE MAP Proj #
0713
16 CONSULTANT PLACE, SUITE 201 Drwn By: JC Dwg No
DURHAM, NORTH CAROLINA 27707 Sierra
P 919.490.4990 F 919.490.8953 Leesville & Doc Nichols R Chk B JR 17
Date: 11/21/07
www.horvathassociates.com Durham, North Carolina Scale: 1"= loo' 3 of

/ \
EX TING GRADE
~
50 LEFT OFCENTERLINE /
`
/
\
EX TING GRADE /
C TERLINE ~ /
\ ~ ~
/
EX TING GRADE ~
50 RIGHT OF CENTERLINE

/ ~ / DUCTILE IRON LOCK-
PIPE REQUIRED FOR
L NT
AERIEL
\ \ ' CROSSING -PER CIT DURHAM
/ STANDARDS
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\~ '
6 LF 0.69% ~ ,
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53 LF @ 0.20% 67

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1 SANITARY SEWER PROFILE
18 scA~e i°=so~
HORVATH ASSOCIATES, P.A. IMPACT PROFILE Proj #
0713
16 CONSULTANT PLACE, SUITE 201
DURHAM
NORTH CAROLINA 27707
Sierra Drwn By: JC Dwg No
,
P 919.490.4990 F 919.490.8953 Leesville & Doc Nichols R Chk B JR 18
Date: 11/21/07

www.horvathassociates.com Durham
North Carolina "
' 3 of
, Scale: 1
- 50

IMPACT
AREA #7
30' PUBLIC SANITARY
SEWER EASEMEM
---- --
C'C' --~--------------- ----~ 30'PUBLIC SANTARY
~~ -- ------ \- --- SEW ER EASEjylEC1L~
- - - -_
~~
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--
HORVATH ASSOCIATES, P.A.
16 CONSULTANT PLACE, SUITE 201
DURHAM, NORTH CAROLINA 27707
P 919.490.4990 F 919.490.8953
www. horvathassociates.com
IMPACT
N0. TYPE S0. FT.
(CH and WL) LINEAR FT.
CH ONLY
6
Buffer
NB Z1
2,206
Only Z2 11,571 ----
(Sanitary

Sewer) TOTAL 13,777
7
Buffer
NB Z1
----
----
Only Z2 1,590 ----
(Sanitary
Sewer) TOTAL 1,590
5p TRAN
OVERALL SITE MAP Proj #
0713
Sierra Drwn By: JC Dwg No
Leesville & Doc Nichols R Chk B : JR 19
Date: 11/21/07
Durham, North Carolina scale: 1"=100' 3 of

z \ / .:
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(CH and WL) LINEAR FT.
CH ONLY
NB
Buffer Z1 ---- ----
Only Z2 1,590 ----
(Sanitar
SSewer) TOTAL 1,590
8 NB Z1
-
Buffer ---- ---
Only Z2 3,588 ----
(Sanita TOTAL 3,588
SSewer
HORVATH ASSOCIATES, P.A. IMPACT MAP Proj #
0713
16 CONSULTANT PLACE, SUITE 201 Drwn By: JC Dwg No
DURHAM, NORTH CAROLINA 27707 Sierra
P 919.490.4990 F 919.490.8953 Leesville & Doc Nichols R Chk B JR 20
Date: 11/21/07
www.horvathassociates.com Durham, North Carolina scale: 1"=100' 3 of

'~ `
~~ \
\
1 \
\ J~m \
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\ \ SEW ER EASEMEM
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N0. TYPE S0. FT.
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s
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Only Z2 3,588 ----
(Sanitary
Sewer) TOTAL 3,588

i ~ \.
Z,zo • \
. ~ ~`
.~ ~'
''.
HORVATH ASSOCIATES, P.A. IMPACT MAP Prol #
0713
16 CONSULTANT PLACE, SUITE 201 Drwn By: JC Dwg No
DURHAM, NORTH CAROLINA 27707 Sierra
P 919.490.4990 F 919.490.8953 Leesville & Doc Nichols R cnk e .1R 21
Date: 11/21/07
www.horvathassociates.com Durham, North Carolina Scale: 1"- loo' 3 of

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IMPACT TYPE SO. FT. LINEAR FT.
N0. (CH and WL) CH ONLY
Buffer & NB Z1 1,891
Stream Z2 1,251 ----
Sanitory
ewer) TOTAL 3,142

HORVATH ASSOCIATES, P.A. IMPACT MAP Proj #
0713
16 CONSULTANT PLACE, SUITE 201 DfWn By: JC Dwg No
DURHAM, NORTH CAROLINA 27707 Sierra
P 919.490.4990 F 919.490.8953 Leesville & Doc Nichols R Chk B JR 22
Date: 11/21/07
www.horvathassociates.com Durham, North Carolina Scale: 1"=100' 3 of

310

300

290

50 93+00 93+50 94+00 94+50 95+00
~ SANITARY SEWER PROFILE
22 SCALE 1 "=50'
HORVATH ASSOCIATES, P.A. IMPACT PROFILE Proj #
0713
16 CONSULTANT PLACE, SUITE 201
DURHAM
NORTH CAROLINA 27707
Sierra Drwn By: JC Dwg No
,
P 919.490.4990 F 919.490.8953 Leesville & Doc Nichols R Chk B JR 22
Date: 11/21/07
www.horvathassociates.com Durham, . North Carolina scale: 1"= so' 3 of
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16 CONSULTANT PLACE, SUITE 201
DURHAM, NORTH CAROLINA 27707
P 919.490.4990 f 919.490.8953
www.horvathassociates.com
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AREA #11
IMPACT TYPE S0. FT. LINEAR FT.
N0. (CH and WL) CH ONLY
11 NB
Buffer Z1 71 ----
Only Z2 1,332 ----
(Road
Fill) TOTAL 1,403
OVERALL SITE MAP Proj #
0713
Sierra Drwn By: JC Dwg No
l
R
Ni
h
ill
& D
L Chk B : JR 23
oc
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s
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e Date: 11/21/07
Durham, North Carolina Scale: 1"- 100' 3 of

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HORVATH ASSOCIATES, P.A.

16 CONSULTANT PLACE, SUITE 201
DURHAM, NORTH CAROLINA 27707
P 919.490.4990 F 919.490.8953
www. horvatha ssociates.com
IMPACT
AREA #12
IMPACT TYPE S0. FT. LINEAR FT.
N0. (CH and WL) CH ONLY
12 NB
Buffer Z1 949 ----
OnIY Z2 2,180 ----
(Road
Fill) TOTAL 3,129
OVERALL SITE MAP
Sierra
Leesville & Doc Nichols R
Durham, North Carolina
Drwn By: JC
Chk By: JR
Proj #
0713
)wg No
24
Date: 11 /21 /07 3 of
Scale: 1 "= 100'

Water Surface Profile Plot for Culvert: Athena Culvert
CTC~~SllI$ - .~tllelia ~~tll~'e1~, ~~~ loll ~1SG~1~11~C - ^~.. Ct
Ct~lt-eit - Athena Ctaz•eit, Gi~l~•eit Discharge ?0.? cf5
390 -
385 "'r-'--"'-"--r---' -'
•,....
i
~.. i
yr ~
~ ~
~ ~ ~ 0 ---$------------.-- ------
W '
-1- - -
375 ---=----------- --------
-20 0 ~0 40 6
Station (ft~
•
Site Data -Athena Culvert
Site Data Option: Culvert Invert Data
Inlet Station: 0.00 ft
Inlet Elevation: 372.20 ft 3 ~- l . 2 0 ~ ~""~
Outlet Station: 80.00 ft
Outlet Elevation: 371.40 ft 3 ~v . ~fo ,,- f b~ri,,
Number of Barrels: 1 d
Culvert Data Summary -Athena Culvert
Barrel Shape: Circular ~
Barrel Diameter: 4~ S~ od ~ w~ 1' ~ u ~`~
Barrel Material: Concrete
Barrel Manning's n: 0.0130
Inlet Type: Conventional
Inlet Edge Condition: Square Edge with Headwall
Inlet Depression: None
__ ___--i-______-----;---
i
i
- - - -~
80 140

Water Surface Profile Plot for Culvert: Atlas Culvert R
•
•
C~'rossi><l~ -atlas C'ul~re~-t. Box, Desi~li Discliarao - ~~G.~ rfs
Calvert -atlas Ct~li-eit R, Ct~h-eit Dischar;e - -~2,3.~ c£s
-1
360 --- --- ------ , ---- --- ----- -- ----------- -------- --------- --------- ----
1 1
~ I 1 1 ~
1 1 1 I ~
1 1 1 ~
1 1
1 ~ ~ ~ ~
3~TJ 1 1 1 1 1 1 1
'---- r ---------~---------~- --------i---------r------- -r---------~----------r-----
~ ~ ~ ~ ~
i ~ ~ i i ~
1 i 1
3 V 0 1 1 1 1 1 1
-----~----------L-------- J---------J--•-------1•---------i --------J---______-1-----
1 1 1 1 1
1
~+ 1 1 1
1 1 1 1 1
1 1 1 1 1
~~'
= 34 ~ ------~ ---------~----- --~----------~----------~---------~--- -----~----------~-----
p
1 I 1 1 , 1
~~ ~ 1 ~
1 ~ ~ ~
~ 340
1 1 1 ; 1
W ~ 1 1 1
1 1 1
1 1
~ ; ~ ~ { t ~ 1
/y3r - 1 1 1 1 1 1 1 1
V{ fV•y --~ --------~----------1----------~---------•-------- ----------~-----
-F-~ - - 1
--fit
- -- ~~-- -
330 - --------;- y ---------~-
-----1---------- - ---------•----------~------------------- - ----
1 ! f t 1 1
1 l f t f 1
1 t
/y 1
{~~ 1 1 1 f 1
,.7 -20 0 20 40 60 SO 100 120
Station (ft)
Site Data -Atlas Culvert R
Site Data Option: Culvert Invert Data
Inlet Station: 0.00 ft
Inlet Elevation: 326.52 ft
Outlet Station: 100.00 ft
Outlet Elevation: 326.39 ft
Number of Barrels: 1
3ZS.52 wl 1' ~p~/~
I Q
3zs.3t w~ ~ ~~~
Culvert Data Summary -Atlas Culvert R
Barrel Shape: Concrete Box
Barrel Span: 8.00 ft ~
Barrel Rise: 7~ g • UDi ~~ ~ b ~ r`~
•
Barrel Material: Concrete
Barrel Manning's n: 0.0130
Inlet Type: Conventional
Inlet Edge Condition: Square Edge (90°) Headwall
Inlet Depression: None

Water Surface Prol~le Plot for Culvert: Atlas Culvert L
C'rossi>ii~ - atlas Cul~~eit. Boy, Desi~i Discharge - 8~4G.3 cfs
Cuh~eit - :~t1as C't~-ert L, Ci~li-ert Discharge - 423.1 cfs
360
355
35a
345
~ 340
W
335
330
325
r---------i- ~ r------- -t---------~----------r-----
i
~ ~ i
~ i ~
~ ~
----- ~----------~-------- ~--------- ~----------~---------i --------J---`------;-----
-~-; - -
;-~
- -
----- ;---------- --------------------,----------~---------r--------- ----------~-----
.~ „
-20 0 20 40 50 80 100 120
~tati0n (ft)
Site Data -Atlas Culvert L
Site Data Option: Culvert Invert Data
Inlet Station: 0.00 ft
Inlet Elevation: 326.52 ft
Outlet Station: 100.00 ft
Outlet Elevation: 326.39 ft
Number of Barrels: 1
Culvert Data Summary. -Atlas Culvert L
Barrel Shape: Concrete Box
Barrel Span: 8.00 ft
Barrel Rise: 8.00 ft
Barrel Material: Concrete
Barrel Manning's n: 0.0130
Inlet Type: Conventional
Inlet Edge Condition: Square Edge (90°) Headwall
Inlet Depression: None

0713 Velocity Dissipator Design
Atlas Culvert
Velocity Dissipator Calculations w/ PIPES.EXE
NRCD Land Quality Section -Pipe Design
Entering the following values will provide you with the expected outlet
velocity and depth of flow in a pipe, assuming the Mannings roughness
number is constant over the entire length of the pipe.
10-Year Outflow, Q (cfs) = 680.21
Slope, S (~) = 0.13
Pipe Dia., D (in.) = 135.3
Mannings nValue = 0.013
John E. Schrum, P.E.
11/20/2007
Flow Depth (ft.) 6.48
Velocity, V (ft/s) 8.82
NRCD Land Quality Section
NYDOT Dissipator Design Results
•
Pipe Dia., Do (ft.) = 1 1.28
Outlet Velocity, Vo (fps) = g.g2
Apron Length, LA (ft.) = 45.1 ZONE 4
Average Dia. Stone Thickness
(inches) Class (inches)
4 A 12
8 B 18
» 10 1 24
14 2 36
Width,W = LA + Do Thickness = 1.5 * DMAx
Width, W = 56.4 ft.
SAY: 57.0 ft.
FINAL DIMENSIONS:

Length, L (ft.) = 45.1
Width, W (ft.) = 57.0
Depth, D (in.) = 24 (NCDENR Erosion 8~ Sed. Cont. Manual §8.06.6)
Stone Class = 1 (NCDOT Std. §1042)
•
*Cells in red denote required inputs from PIPES.exe outputs
**Velocity from Culvert Summary Table
Do = x *2*1.25 = 11.28'

0713 Velocity Dissipator Design John E. Schrum, P.E.
Athena Culvert 1 1 /20/2007
Velocity Dissipator Calculations w/ PIPES.EXE
NRCD Land Quality Section -Pipe Design
Entering the following valves will provide you with the expected outlet
velocity and depth of flow in a pipe, assuming the Mannings roughness
number is constant over the entire length of the pipe.
10-Year Outflow, Q (cfs) = 70.73 Flow Depth (ft.) 1.98
Slope, S (~) = 1.00 Velocity, V (ft/s) 11.40
Pipe Dia., D (in.) = 48
Mannings nValue = 0.013
NRCD Land Quality Section
NYDOT Dissipator Design Results
Pipe Dia., Do (ft.) = 4.00
Outlet Velocity, Vo (fps) = 11.40
Apron Length, LA (ft.) = 32.0 ZONE 3
Average Dia.
(inches)
•

Width,W =
Width, W =
SAY:
FINAL DIMENSIONS:
4
8
10
14
LA + Do
36.0
36.0
Stone Thickness
Class (inches)
A 12
B 18
1 24
2 36
Thickness = 1.5 * DMAx
ft.
ft.

Length, L (ft.) = 32.0
Width, W (ft.) = 36.0
Depth, D (in.) = 24 (NCDENR Erosion & Sed. Cont. Manual §8.06.6)
" Stone Class = 1 (NCDOT Std. §1042)
*Cells in red denote required inputs from PIPES.exe outputs
•

Name of Stream Description Curr. Class Date Prop. Class Basin Stream Index #
Rocky Branch From source to a point WS-IV;NSW 08/01/98 Neuse 27-7-(1)
0.5 mile upstream of
Durham County SR 1802
Rocky Branch From a point 0.5 mile WS-IV;NSW,C08/01/98 Neuse 27-7-(2)
upstream of Durham A
County SR 1802 to Falls
Lake, Neuse River
Little Lick Creek From source to a point WS-IV;NSW 08/01/98 Neuse 27-9-(0.5)
0.4 mile upstream of
Durham County SR 1811
Chunky Pipe Creek From source to Little WS-IV;NSW 08/03/92 Neuse 27-9-1
Lick Creek
Little Lick Creek From a point 0.4 mile WS-IV;NSW,C08/01/96 Neuse 27-9-(2)
(including upstream of Durham SR A
portion of Little 1811 to Falls Lake,
Lick Creek Arm of Neuse River
Falls Lake)
Lick Creek From source to Wake WS-IV;NSW 08/01/98 Neuse 27-11-(0.5)
County SR 1809
Martin Creek From source to Lick WS-IV;NSW 08/03/92 Neuse 27-11-1
Creek
Lick Creek From Wake County SR WS-IV;NSW,C08/01/98 Neuse 27-11-(1.5)
1809 to Falls Lake, A
Neuse River
Rocky Branch From source to a point WS-IV;NSW 08/01/98 Neuse 27-11-2-(1)
0.3 mile upstream of
mouth
Rocky Branch From a point 0.3 mile WS-IV;NSW,COS/01/98 Neuse 27-11-2-(2)
upstream of mouth to A
Lick Creek
Laurel Creek From source to a point WS-IV;NSW 08/01/98 Neuse 27-11.5-(0.5)
0.1 mile upstream of
N.C. Hwy. 98
Laurel Creek From a point 0.1 mile WS-IV;NSW,C 08/01/98 Neuse 27-11.5-(0.7)
upstream of N.C. Hwy. A
98 to Falls Lake, Neuse
River
Unnamed Tributary From source to a point WS-IV;NSW 08/01/98 Neuse 27-11.5-1-(1)
to Laurel Creek 0.1 mile upstream of
backwaters of Perry Pond
Unnamed Tributary From a point 0.1 mile WS-IV;NSW,C08/01/98 Neuse 27-11.5-1-(2)
to Laurel Creek upstream of backwaters A
(Perry Pond) of Perry Pond to Laurel
Creek
Brier Creek From source to Crabtree C;NSW 05/01/88 Neuse 27-33-4
Lake, Crabtree Cr.
Little Brier Creek From source to Brier C;NSW 05/01/88 Neuse 27-33-4-1
Creek
Stirrup iron Creek From source to Brier C;NSW 05/01/88 Neuse 27-33-4-2
Creek

Page 5 of 6

Michael F. Easley, Governor
MacGregor Development
Attn: Bruce Herbert
201 Shannon Oaks Circle, Suite 201
Cary, NC 27707
May 26, 2006
BASIN:
Neuse River X Tar-Pamlico
~ ~!~, j ^,nn^
J~~ ~,~:
~~'
MACGREGOR DEVELOPMENT CO.
NBR# 06-135
Durham County
(1~A NCAC 2B .0233)
Complaint NOV
Buffer Determination X
Incident # Appeal Call
Project Name: Earthquake Addition S& EC# (8781.
Location/Directions: Located south of the intersection of SR 1908 and SR 1905 and north of the SR 1906
•
Subject Stream: UT to Lick Creek
Date of Determination: 5/9/2006
Feature(s) Not
Subject Subject Start @ Stop@ Stream
Form Pts. Soil
Survey USGS
Topo
A X X X
B X X X
C X Stop
channel
fla X X
D X MO1 fla X X
E X X

Explanation: The feature(s) listed above has or have been located on the Soil Survey of Durham County, North
Carolina or the most recent copy of the USGS Topographic map at a 1:24,000 scale. Each feature that is checked
"Not Subject" has been determined not to be a stream or is not present on the property. Features that are checked
"Subject" have been located on the property and possess characteristics that qualify it to be a stream. There may be
other streams other streams located on your property that do not show up on the maps referenced above but, still
maybe considered jurisdictional according to the US Army Corps of Engineers and/or to the Division of Water
Quality.
•
NorthCarolina
JVa~irrallJ
North Carolina Division of Water Quality Raleigh Regional Office Surface Water Protection Phone [phone] Customer Service
Internet: h2o.enr.state.nc.us 1628 Mail Service Center Raleigh, NC 27699-1628 FAX (919) X71-4718 1-877-623-6748
An Equal OpportunitylAffrmative Action Employer- 50% Recycled/10% Post Consumer Paper
William G. Ross Jr., Secretary
North Carolina Department of EnvironmePt and Natural Resources
Alan W. Klimek, P.E. Director
(15A NCAC 2B .0259)

Earthquake Creek Addition, ; EC # 8781 w3
Durham County
5/26/2006
Page 2 of 2
• This on-site determination shall expire five (5) years from the date of this letter. Landowners or affected
parties that dispute a determination made by the DWQ or Delegated Local Authority that a surface water
exists and that it is subject to the buffer rule may request a deternunation by the Director. A request for a
deternunation by the Director shall be referred to the Director in writing c/o Cyndi Karoly ,DWQ
Wetlands/401 Unit, 2321 Crabtree Blvd., Raleigh, NC 27604-2260. Individuals that dispute a determination
by the DWQ or Delegated Local Authority that "exempts" a surface water from the buffer rule may ask for
an ad judicatory hearing. You must act within 60 da}~s of the date that you receive this letter. Applicants are
hereby notified that the 60-day statutory appeal time does not start until the affected party (including
downstream and adjacent landowners) is notified of this decision. DWQ recommends that the applicant
conduct this notification in order to be certain that third party appeals are made in a timely manner. To ask
for a hearing, send a written petition, which conforms to Chapter 150B of the North Carolina General
Statutes to the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. This
determination is final and binding unless you ask for a hearing within 60 da}'s.
The (owner/future owners) should notify the Division of Water Quality (including any other Local, State,
and Federal Agencies) of this decision concerning an}~ future correspondences regarding the subject property
(stated above). This project may require a Section 404/401 Permit for the proposed activity. Any inquiries
should be directed to the Division of Water Quality (Central Office) at (919)-733-1786, and the US Army
Corp of Engineers (Raleigh Regulatory Field Office) at (919)-876-8441.
Respectfully,
Michael Horan
Environmental Spec. I
CC: Maximilian Merrill, S & EC, 11010 Raven Ridge Road, Raleigh, NC 27614
KB Homes, Attn: Chris Prussman, 2610 Wycliff Road, Suite 102, Raleigh, NC 27607
Joe Pearce, Durham County Engineering, P 120 East Parrish St., Durham, NC 27701
Todd Tugwell-US Army Corps of Engineers, Raleigh Regulatory Office
Wetlands/ Stonnwater Branch, 2321 Crabtree Blvd, Suite 250, Raleigh. NC 27604
File Copy
Central Files
•
No ehCarolina
J1~atura!!y
North Carolina Division of Water Quality Raleigh Regional Office Surface Water Protection Phone [phone] Customer Service
Internet: h2o.enr.state.nc.us 1628 Mail Service Center Raleigh, NC 27699-1628 FAX [phone]
An Equal Opportunity/Affirmative Action Employer- 50% Recycled110% Post Consumer Paper

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Project Number:
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Date:
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Map Title:
figure 2. Soils Map
Earthquake Creek
Earthquake Creek Addition
Project #: 878 I . W3
Durham CO, NC
Source:
Durham Co sods Survey
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~ Soil & Environmental Consultants, PA
11010 Raven P,idge Rd.• Raleigh, NC 27614
[phone] • (919) 84Fr9467
Web Page: wan•J.SandEC.com

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Project Number: Map Tltle: - -
878 ~ . W3 Figure I . USGS Quad ,. -
Pro~ect Manager: Earthquake Creek
DG Earthquake Creek Addition ~ Soil & Environmental Consultants, PA
cale: Pro ect #: 878 I . W3 11010 Raven Ridge Rd.• Raleigh, NC 27614
~ (919} 846-5900 • [phone]
~ " - 20r~~' Durham CO, NC Web Page: www.SandEC.com
Date: Source:
04/20/06 South East Durham Quad

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O~O~ W A T ~9pG
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Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
May 26, 2006
•
•
MacGregor Development
Attn: Bruce Herbert
201 Shannon Oaks Circle, Suite 201
Cary, NC 27707
BASIN:
Neuse River X
Tar-Pamlico
Alan W. Klimek, P.E. Director
Division of Water Quality
.,, -
i -.
MACGREGOR DEVELOPMENT CO.
NBR# 06-136
Durham County
(15A NCAC 2B .0233) (15A NCAC 2B .0259)
Complaint NOV Buffer Determination X
Incident #
Call
Project Name: Earthquake (Ross Tract) S&.EC# (8781.w3)
Location/Directions: Located south of the intersection of SR 1908 and SR 1905 and north of the SR 1906
Subject Stream: UT to Lick Creek
Date of Determination: 4/17/2006
Feature(s) Not
Subject Subject Start @ Stop@ Stream
Form Pts. Soil
Survey USGS
Topo
A X A01 X
B X B1 B2 X
C X C1 X
D X DO1 & D03 D2 X
E X E01 X
F X FO1 X
H X HO1 X
I X I01 X
J X X X
Explanation: The feature(s) listed above has or have been located on the Soil Survey of Durham County, North
Carolina or the most recent copy of the USGS Topographic map at a 1:24,000 scale. Each feature that is checked
"Not Subject" has been determined not to be a stream or is not present on the property. Features that are checked
"Subject" have been located on the properly and possess characteristics that qualify it to be a stream. There may be
other streams other streams located on your property that do not show up on the maps referenced above but, still
maybe considered jurisdictional according to the US Army Corps of Engineers and/or to the Division of Water
Quality.
This on-site determination shall expire five (5) years from the date of this letter. Landowners or affected o°e
NorthCarolina
parties that dispute a determination made by the DWQ or Delegated Local Authority that a surface water ~1~hrrallf
North Carolina Division of Water Quality Raleigh Regional Office Surface Water Protection
Internet: h2o.enr.state.nc.us 1628 Mail Service Center Raleigh, NC 27699-! 628
Phone [phone] Customer Service
FAX (919) i71-4718 1-877-623-6748
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
__

Earthquake Ross Tract, S & . # 8781.w3
Durham County
5/26/2006
Page 2 of 2
•
•
•
North Carolina Division of Water Quality Raleigh Regional Office Surface Water Protection
Internet: h2o.enr.state.nc.us 1628 Mail Service Center Raleigh, NC 27699-1628
maybe considered jurisdictional according to the US Arn-ty Cotps of Engineers and/or to the Division of Water
Quality.
This on-site determination shall expire five (5) years from the date of this letter. Landowners or affected
parties that dispute a deterrination made by the DWQ or Delegated Local Authority that a surface water
exists and that it is subject to the buffer rule may request a determination by the Director. A request for a
deternnation by the Director shall be referred to the Director in writing c/o Cyndi Karoly ,DWQ
Wetlands/401 Unit, 2321 Crabtree Blvd., Raleigh, NC 27604-2260. Individuals that dispute a determination
by the DWQ or Delegated Local Authority that "exempts" a surface water from the buffer rule may ask for
an ad judicatory hearing. You must act within 60 days of the date that you receive this letter. Applicants are
hereby notified that the 60-day statutory appeal time does not start until the affected party (including
downstream and adjacent landowners) is notified of this decision. DWQ recommends that the applicant
conduct this notification in order to be certain that third party appeals are made in a timely manner. To ask
for a hearing, send a written petition, which conforms to Chapter 150B of the North Carolina General
Statutes to the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. This
determination is final and binding unless you ask for a hearing within 60 days.
The (owner/future owners) should notify the Division of Water Quality (including any other Local, State,
and Federal Agencies) of this decision concerning any future correspondences regarding the subject property
(stated above). This project may require a Section 404/401 Permit for the proposed activity. Any inquiries
should be directed to the Division of Water Quality (Central Office) at (919)-733-1786, and the US Army
Corp of Engineers (Raleigh Regulatory Field Office) at (919)-876-8441.
Respectfully,
~~~
Michael Horan
Environmental Spec. I
CC: Maximilian Merrill, S & EC, 11010 Raven Ridge Road, Raleigh, NC 27614
KB Homes, Attn: Chris Prussman, 2610 Wycliff Road, Suite 102, Raleigh, NC 27607
Joe Pearce, Durham County Engineering, P 120 East Parrish St., Durham, NC 27701
Todd Tugwell-US Army Corps of Engineers, Raleigh Regulatory Office
Wetlandsl Stormwater Branch, 2321 Crabtree Blvd, Suite 250, Raleigh, NC 27604
File Copy
Central Files
Phone [phone] Customer Service
FAX [phone] I-877-623-6748
No°rthCarolina
~Natt,!ra!!y
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper

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Map Title:
Flgure I . USGS Quad
Earthquake Creek
(Ross Tract)
Project #: 878 I . W3
Durham CO, NC
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~ Soil & Environmental Consultants, PA
11010 Raven Ridge Rd.- Raleigh, NC 27614
(9194846-5900 -(9194846-94&7
Web Page: www SandEC com
Date:
0 I /23/06
Source:
South East Durham C~uad

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Project Number: Map Title:
878 I .W3 Figure 2. Soil Survey Map
Project Manager: Earthquake Creek
DG (Egypt Tract) ~ Soil & Environmental Consultants, PA
11010 Raven Ridge Rd.• Raleigh, NC 27614
Scaie: Project #: 8781 .W3 ~sls~fias-ssoo-~s1s~a4s-s4s7
~ " _ ~ 58L~-~fl Durham CO, NC Web Page: www.SandECcom
Date: Source:
Q ~ ~23~Q~ Durham Co Soil Survey ,' ~';,1~' ' ~- ~ ~ ~; r
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~ ~ ~ ~ ~ ~WTERS OF THE UJL SUBJECT TO THE NEUSE RIVER 60 R BUFFERS
[eMnm3hnt stnanu; muss be conttrtled by tM USAGE and DWG]
~ a ~ e ~ ~AIATERS QF THE US. SUBJECT TO THE NEUSE RNER 60 R. BUFFERS
(pentorYN strcanta; must be conformed by tlr USAGE and DWG]
=mm ~UARGINAL WA777t5 OF THE UJ3. POTI7lTVILLY SUBJECT 7D THE NEUSE RIVER 601E BUFFERS (must 6e cordfm~ed Dy the USAGE and DYVO]
® = 56EC FLAG DENOTING THE STARTING POMfT OF THE NEUSE BUFFERS
[must Ds conformed W the USAGE and DWG
= S3EC FLAG DENOTNG THE STOP POW T Of THE NEUSE BUFFERS
[must tw coofkmtd try tM USAGE snd DWG
= JUR6DICl10NAL WETLANDS
[must be coNimaM ly the USAGE(
= MARGINAL WETLANDS
[must 6e corfim~ed by LM USAGE]
~ =BOUNDARY OF EVALUATED AREA
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~~~ =MARGINAL CHANNEL

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NOTE TO SURVEYOR I - -- l ' f ~ • _ . _ _
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All stmam tlranneb on the pmperty shoutl be surveyed h ~ ~ -' =
Mein entirety. A9 bends should De surveyed mrd era stream '- ~-' -
width eihershown or noted at eadr surveyed po~L
VNetlands
The wetland bountlaries have Veen flagged wllh pink ` ` ~
SSEC logo Fags. Fads Ilag intludas a number (e.g., 2g~.
M wetlands shoutl be shovm as dosed polygons. ~ \
Some may be tied to Me property Gne or Iha slmam
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j Soil & Environmental Consultants, PA N
11010 Raven Ridge Rd.• Raleigh, NC 27614
(919} 846-5900 • [phone] ~l E
Web Page: www.SandEC.com
S
Project Name: Ross Tract
Project #: 8781.W3
Project Manager: David Gainey
Site Location: Durham, NC
Source: DOT GIS/ Durham County
1 /23/06
Map by: Maximilian Merrill
1"= 200FT
Legend

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0713 Section 401 Impact Summary
List of Impacts
. Impact SF Zone Comment Stream
Area
1 2417 1 ss perp intermittent
1 226 2 ss perp intermittent
1 1709 2 ss perp intermittent
lA 8043 1 road cross intermittent
lA 1402 2 road cross intermittent
1 A 2709 2 road cross intermittent
2 1048 1 ss parallel intermittent
2 1554 1 ss parallel intermittent
2 15768 2 ss parallel intermittent
2A 1952 1 ss perp intermittent
2A 725 2 ss perp intermittent
3 599 1 ss parallel intermittent
3 5189 2 ss parallel intermittent
3 1965 1 ss perp intermittent
3A 2588 1 ss perp perennial
3A 185 2 ss perp perennial
3B 3567 2 ss parallel perennial
4 1849 1 ss perp intermittent
4 2064 1 ss perp perennial
4 820 2 ss perp perennial
4 1211 2 ss perp perennial
_ 4 3094 2 ss perp perennial
4A 2106 2 ss parallel perennial
4B 2937 1 ss perp intermittent
4B 1013 2 ss perp intermittent
4B 1177 2 ss perp intermittent
4C 9445 1 road cross perennial
4C 2517 2 road cross perennial
4C 3047 2 road cross perennial
5 259 2 ss parallel perennial
5 2171 2 ss parallel perennial
5A 9646 2 ss parallel perennial
SA 2152 1 ss perp perennial
5A 649 2 ss perp perennial
6 1735 2 ss parallel perennial
6 9836 2 ss parallel perennial
6 2207 1 ss perp intermittent
7 1590 2 ss parallel perennial
8 3589 2 ss parallel perennial
9 1891 1 ss perp perennial
9 612 2 ss perp perennial
9 639 2 ss perp perennial
11 71 1 road till intermittent
11 1332 2 road X11 intermittent
12 949 1 road fill intermittent
12 2180 2 road fill intermittent
Horvath Associates
12/16/2007
Impact
Area LF Comment Stream
1 A 134 road cross intermittent
4C 146 road cross perennial
1 34 ss cross intermittent
3 33 ss cross intermittent
4 31 ss cross intermittent
4 33 ss cross perennial
6 39 ss cross intermittent
9 32 ss cross perennial
2A 31 ss cross intermittent
3A 45 ss cross perennial
4B 45 ss cross intermittent
5A 32 ss cross perennial
*Bold and italicized =mitigation required
Mitiaation Summary Table
Zone 1 Zone 2
Impacts 21,709 13,187
Multiplier 3 1.5
Credits Needed 65,127 19,781
Credits Approved 87,060 14,948

•
IMPERVIOUS SURFACE AREA CALCULATIONS
(Phase 1)
TOTAL AREA = 422.60 AC (18,408,566 SF)
MAXIMUM ALLOWABLE IMPERVIOUS AREA = 4,418,055 SF (249b)
STREETS /SIDEWALK /PARKING = 988,035 SF (5.369b)
•
TOWNHOMES:
130 UNITS x 1,200 SF/UNIT =156,000 SF (0.85°lb)
60' UNITS:
152 UNITS x 2,400 SF/UNIT = 364,800 SF (1.98)
70' UNRS:
105 UNffS x 2,800 SF/UNIT = 294,000 SF (1.599b)
80' UNITS:
112 UNITS x 3,200 SF/UNIT = 358,400 SF (1.949b)
MISCELLANEOUS RESERVE = 13,254 SF (0.079b)
CLUBHOUSE/POOL = 101,664 SF (.559b)
TOTAL PROPOSED IMPERVIOUS AREA = 2,277,153 SF (12.37%)
FUTURE IMPERVIOUS SURFACE AREA CALCULATIONS
(Total Build Out)
TOTAL AREA = 422.60 AC (18,408,566 SF)
MAXIMUM ALLOWABLE OVERALL IMPERVIOUS AREA = 4,418,055 SF (24%)
PHASE (IMPERVIOUS = 2,277,153 SF (12.379b)
PHASE II RESERVE IMPERVIOUS AREA = 2,140,902 SF (11.639b)
OVERAL FUTURE IMPERVIOUS AREA = 4,418,055 SF (249b)

Level Spreaders Table Ben Thayer, EI
Level Spreader Summary 12/1 1 /2007
•
Upstream Forebay Req'd Req'd Req'd
End Section Composite 1 "/hr Flow
Area Invert (ft) Area (sq Length Length Length
ID Rational C (cfs)
(acres) ft) (forest) (grass) (hybrid)
FES9 6.37 0.69 4.41 360.11 560 287 57 194
FES 13 6.22 0.66 4.13 350.00 550 268 54 182
FES55 6.63 0.74 4.96 390.57 580 322 64 218
FES66 1.29 0.90 1.17 383.51 120 76 15 51
FES72 4.07 0.56 2.32 391.83 360 151 30 102
FES96 6.32 0.31 1.99 431.11 n/a n/a n/a n/a
Notes:
* FES96 is an existing twin 24" headwall.
* Forebay Area =Upstream Area * 0.002
* Minimum level spreader length is 30', and maximum length is 130'.
* Required filter strip length = 1 "/hr flow * (65 ftlcfs (forest) OR 13 ft/cfs (grass) OR 44 ft/cfs (hybrid))
* Hybrid filter strip assumes 20' grass, 30' forest (44 ft/cfs as specified in BMP Manual).

End Section
ID
10-Year
Flow Pipe
Diameter

(in)
Pipe Slope
(eft)
----
Len h
~ Velocity Dissipator
-- _.~
Width De th
p
~_
Stone
Class
FES9 30.81 30 0.019 20' 23' 24" Cl.l
FES 13 25.50 36 0.007 18' 21' 18" Cl. B
FES55 32.68 36 0.010 24' 27' 24" Cl.l
FES66 8.30 18 0.007 6' 8' 12" Cl. A
FES72 15.42 24 0.010 12' 19' 18" Cl. B
FES96 n/a 24x2 n/a n/a n/a n/a n/a
Notes:
* FES96 is an existing twin 24" headwall.
* See velocity dissipator design sheets for calculations.
•

p~pF W A TF9QG Michael F. Easley, Governor
~ ~ William G. Ross Jr., Secretary
1-- North Carolina Department of Environment and Natural Resources
~ 1
D 'C Coleett II. Sullins, Director
Division of Water Quality
Memorandum
August 20, 2007
From: Coleen H. Sullin
Subj: Policy Change Regarding the R lew and Approval of Stormwater Management Plans
Associated with 401 Certification Applications
Tile purpose of this memorandum is to initiate and publicize a major change in the review and approval
of Stormwater Management Plans (SMPs} submitted as part of the 401 Certification application process.
At present, all activities that require a 401 Certification and that will also have impervious surface
coverage equal to or greater than 30°l0* (this 30% is referred to as the "impervious surface threshold")
are required to submit a stormwater management plan as part of the 401 application process for review
and approval by appropriate DWQ 401 Staff. This current DWQ review and approval is in addition to
any local government review and approval of the SMP that may be required under local government
implementation of aState-mandated stormwater program. In an effort to maximize the use of limited
staff resources at the State and local level, and in order to streamline the permitting process and remove
any unnecessary duplication in the review of these stormwater management plans, effective on the date
of this memorandum, SMPs that have been approved by an element of a local government as part of that
local government's implementation of aState-mandated stormwater control program, will not require
additional stormwater approval from DWQ 401 Staff for the approval and issuance of the 401
Certification. For the purposes of this policy, local approval of the SMP under the following State
stormwater programs shall satisfy this requirement and shall not require the approval of the SMP by
DWQ 401 permitting staff as part of the 401 application process:
• Water Supply Watershed II, III, and N
• Local Implementation of the NPDES Phase 2 Program
• Universal Stormwater Management Program
• Nutrient Sensitive Waters (NSW) Stormwater Nutrient Loading Limits
• Randleman Lake Water Supply Watershed Stormwater Requirements
Under this new policy, applicants shall submit:
1. A valid appsnvai letter from the appropriate local government indicating that the proposed
activity has a SMP that has been approved and indicating under which State stonmwater program
the approval has been granted along with a copy of the approved SMP, or
2. If the necessary local approval of the SMP has not yet been obtained at the time of application,
the application should indicate that a SMP has been, or will be, submitted for local government
approval, indicate the local government that approval is being requested from, and indicate under
what State stormwater program the activity wits be covered by. Any 401 Certification approved
under this scenario shalt be conditioned so that the proposed activity shall not commence until
such time that the appropriate local approval has been granted. In addition, following local Ift~na
J~-+'' y
North Camlirta I)ivisiart ofYr'ata QwGty 1677 Mail Service Center Raleigh, NC 27699-1617 Phone (9l9) 733-5083 Cu~atter Service
Internet: wwtivncivaterqualitvor4 Location: 5l2 N. Salisbury St. Raleigh,ldC 27604 Fax [phone]'7-X623-67$S
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• government approval, a copy of the approved SMP shall be submitted to DWQ for record-
keeping purposes.
Applications for 401 Certifications for proposed activities that exceed the impervious surface threshold
but are not within a local jurisdiction that is implementing a State stormwater program must still contain
a SMP for DWQ review and approval. Applications that exceed the impervious surface threshold and
do not contain a SMP or the information specified in #1 and #2 above, shall be returned as incomplete.
As a result of this policy change, the Division of Water Quality will develop a comprehensive training
program for those local govenunent personnel directly involved in the SMP review and approval
process. Once this training program has been developed, the Division will require that local SMP
review personnel attend and successfully complete this course of instruction in order to continue the
implementation of this policy within that local jurisdiction. The Division will also develop a proactive
audit and review program that will be intended to ensure that the applicable stormwater program
requirements are being successfully implemented at the local level.
Notwithstanding the policy previously set forth within this document, the Director of the Division of
Water Quality reserves the right to require the review and approval of individual stormwater
management plans on a case-by-case basis in order to ensure that a proposed activity will not violate
water quality standards. Additionally, the DWQ Director reserves the prerogative to provide comments
to local governments of special provisions that may need to be incorporated into locally-reviewed SMPs
in order to provide an enhanced level of protection to sensitive watersheds or to provide an enhanced
level of stormwater control on unusual projects.
Please direct questions regarding this new policy to Tom Reeder at 919-733-5083 extension 528 or at
tom.reeder~ncmaiLnet or Cyndi Karoly at 919-733-9721 or at cyndi.karol~(lu,ncmail.net .
* Note: Under the ongoing renewal of the NC General Certifications it has been proposed to lower the
impervious surface threshold to 24% when the new General Certifications go into effect.
•