20110661 Ver 1_401 Application_20110711

Jones & Cnossen
A&14? ENGINEERING, PLLC
Civil Engineering I Construction Management I Land Planning
221 N. SALEM ST, SUITE 200
PO BOX 1062
APEX, NC 27502
Office: 919-387-1174
Fax: [phone]
www.jonescnossen.com
July 12, 2011
Amy Chapman
NCDWQ
1650 Mail Service Center
Raleigh, North Carolina 27699
RE: PCN Form
Chastain Subdivision
Dear Amy,
20110661
I am submitting three (3) copies of a PCN Form for approval to repair an erosional feature behind Lot 628 in
the Chastain subdivision. This erosional feature was observed during my annual inspection of the existing
onsite stormwater structures when it was determined that the erosional feature encroached an existing
riparian buffer. A repair of the erosional feature has been recommended by a geotechnical consultant and the
contents of their report are attached. I would like to make the necessary repairs as soon as possible so any
help that you can provide to expedite this process would be appreciated.
I want you to know that I have met with Lauren Witherspoon with the DWQ on site to observe this erosional
feature. She has been very helpful to us. I'm just letting you know this as she can probably answer some of
your questions if you have them. Thanks for your assistance and let me know if you need anything else from
me.
Sincerely,
??? Qv?
Peter D. Cnossen, P.E.
Jones & Cnossen Engineering, PLLC
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JUL 1 4 2011

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Office Use Only:
Corps action ID no.
DWQ project no.
Form Version 1.4 January 2009
Pre-Construction Notification (PCN) Form
A. Applicant Information
1. Processing
1 a. Type(s) of approval sought from the Corps: ? Section 404 Permit ? Section 10 Permit
1 b. Specify Nationwide Permit (NWP) number: or General Permit (GP) number:
-
1 c. Has the NWP or GP number been verified by the Corps?
7
? Yes El No
1 d. Type(s) of approval sought from the DWQ (check all that apply):
? 401 Water Quality Certification - Regular ? Non-404 Jurisdictional General Permit
? 401 Water Quality Certification - Express N Riparian Buffer Authorization
1 e. Is this notification solely for the record
because written approval is not required? For the record only for DWQ
401 Certification:
? Yes ? No For the record only for Corps Permit:

? Yes ? No
If. Is payment into a mitigation bank or in-lieu fee program proposed for
mitigation of impacts? If so, attach the acceptance letter from mitigation bank
or in-lieu fee program.
? Yes N No
1g. Is the project located in any of NC's twenty coastal counties. If yes, answer 1 h
below. ? Yes N No
1 h. Is the project located within a NC DCM Area of Environmental Concern (AEC)? ? Yes N No
2. Project Information
2a. Name of project: Chastain II
2b. County: Wake
2c. Nearest municipality / town: Raleigh
I IN Lk'_iZL9flWS n.
2d. Subdivision name: Chastain 1UU U1
2e. NCDOT only, T.I.P. or state project no: JU
3. Owner Information
3a. Name(s) on Recorded Deed:

3b. Deed Book and Page No. Chastain of Raleigh Community Assoc. Inc. ' O ER
...A Mai I
DB 10933, PG 0684
3c. Responsible Party (for LLC if
applicable): Omega Association Management
;
3d. Street address: 1010 Buck Jones Road
3e. City, state, zip: Raleigh, North Carolina 27606
3f. Telephone no.: 919-461-0102
3g. Fax no.: 919-461-0106
3h. Email address: [e-mail]
Page 1 of 10
PCN Form - Version 1.4 January 2009
4. Applicant Information (if different from owner)
4a. Applicant is: ?X Agent ? Other, specify:
4b. Name: Omega Association Management
4c. Business name
(if applicable): Omega Association Management
4d. Street address: 1010 Buck Jones Road
4e. City, state, zip: Raleigh, North Carolina, 27606
4f. Telephone no.: 919-461-0102
4g. Fax no.: 919-461-0106
4h. Email address: [e-mail]
5. Agent/Consultant Information (if applicable)
5a. Name: Peter Cnossen, P.E.
5b. Business name
(if applicable): Jones & Cnossen Engineering, PLLC
5c. Street address: 221 North Salem Street, Suite 001
5d. City, state, zip: Apex, North Carolina, 27502
5e. Telephone no.: 919-387-1174
5f. Fax no.: 919-387-3375
5g. Email address: [e-mail]
Page 2 of 10
B. Project Information and Prior Project History
1. Property Identification
1a. Property identification no. (tax PIN or parcel ID): PIN: 1732 525483
1b. Site coordinates (in decimal degrees): Latitude: 35.734 Longitude: -78.5396
1 c. Property size: 71.51 acres
2. Surface Waters
2a. Name of nearest body of water to proposed project: Tributary of Crabtree Creek
2b. Water Quality Classification of nearest receiving water: QNSW
2c. River basin: Neuse River Basin
3. Project Description
3a. Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this
application:
The site is dedicated open space behind residential lots within the Chastain subdivision; a portion of which is an existing 50' Neuse River Buffer.
Stormwater is discharged above the NRB but has eroded a relatively deep channel from the FES to the existing stream channel. The surrounding
area consists of open grassed areas and woods. The topography of the site area has significant slope.
3b. List the total estimated acreage of all existing wetlands on the property: 0
3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property: 4,800
3d. Explain the purpose of the proposed project:
To repair the erosional feature along the bank of the UT to Crabtree Creek.
3e. Describe the overall project in detail, including the type of equipment to be used:
The proposed repair of the erosional feature will consist of grading a uniform slope following by installation of geotextile fabric and rip-rap.
4. Jurisdictional Determinations
4a. Have jurisdictional wetland or stream determinations by the
Corps or State been requested or obtained for this property /

project (including all prior phases) in the past? ?X Yes ? No ? Unknown

Comments:
4b. If the Corps made the jurisdictional determination, what type
of determination was made? ? Preliminary ?X Final
4c. If yes, who delineated the jurisdictional areas?
Name (if known): Agency/Consultant Company:
Other: Soil & Environmental Consultants
4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation.
5. Project History
5a. Have permits or certifications been requested or obtained for
this project (including all prior phases) in the past? M Yes ? No ? Unknown
5b. If yes, explain in detail according to "help file" instructions.
This project was approved for construction in 2002. Documentation regarding the buffers and wetlands is not available.
6. Future Project Plans
6a. Is this a phased project? ? Yes ?X No
6b. If yes, explain.
Page 3 of 10
PCN Form -Version 1.4 January 2009
C. Proposed Impacts Inventory
1. Impacts Summary
1 a. Which sections were completed below for your project (check all that apply):
? Wetlands ? Streams -tributaries ?X Buffers ? Open Waters ? Pond Construction
2. Wetland Impacts
If there are wetland impacts proposed on the site, then complete this question for each wetland area impacted.
2a.
Wetland impact
number
Permanent (P) or
Temporary 2b.
Type of impact 2c.
Type of wetland 2d.
Forested 2e.
Type of jurisdiction
Corps (404,10) or
DWQ (401, other) 2f.
Area of
impact
(acres)
W1 - Choose one Choose one Yes/No
W2 Choose one Choose one Yes/No
W3 Choose one Choose one Yes/No
W4 - Choose one Choose one Yes/No -
W5 Choose one Choose one Yes/No
W6 Choose one Choose one Yes/No
2g. Total Wetland Impacts:
2h. Comments:
3. Stream Impacts
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this
question for all stream sites impacted.
3a.
Stream impact
number
Permanent (P) or
Temporary (T) 3b.
Type of impact 3c.
Stream name 3d.
Perennial (PER) or
intermittent (INT)? 3e.
Type of
jurisdiction 3f.
Average
stream
width
(feet) 3g.
Impact
length
(linear
feet)
S1 - Choose one -
S2 - Choose one -
S3 - Choose one - -
S4 - Choose one - -
S5 - Choose one
S6 - Choose one - -
3h. Total stream and tributary impacts
3i. Comments:
Page 4 of 10
PCN Form -Version 1.4 January 2009
4. Open Water Impacts
If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of
the U.S. then individual) list all open water impacts below.
4a.
Open water
impact number
Permanent (P) or
Temporary 4b.
Name of waterbody
(if applicable) 4c.

Type of impact 4d.

Waterbody
type 4e.

Area of impact (acres)
01 - Choose one Choose
02 - Choose one Choose
03 - Choose one Choose
04 - Choose one Choose
4f. Total open water impacts
4g. Comments:
5. Pond or Lake Construction
If and or lake construction proposed, then complete the chart below.
5a.
Pond ID number 5b.
Proposed use or
purpose of pond 5c.
Wetland Impacts (acres) 5d.
Stream Impacts (feet) 5e.
Upland
(acres)
Flooded Filled Excavated Flooded Filled Excavated
P1 Choose one
P2 Choose one
5f. Total:
5g. Comments:
5h. Is a dam high hazard permit required? ? Yes ? No If yes, permit ID no:
5i. Expected pond surface area (acres):
5j. Size of pond watershed (acres):
5k. Method of construction:
6. Buffer Impacts (for DWQ)
If project will impact a protected riparian buffer, then complete the chart below. If yes, then individually list all buffer impacts
below. If an impacts require mitigation, then you MUST fill out Section D of this form.
6a. Project is in which protected basin? ? Neuse ? Tar-Pamlico ? Catawba ? Randleman ? Other:
6b.
Buffer Impact
number-
Permanent (P) or
Temporary 6c.
Reason for impact 6d.
Stream name 6e.
Buffer
mitigation
required? 6f.
Zone 1
impact
(square
feet 6g.
Zone 2
impact
(square
feet
61 P Buffer Repair Tributary of Crabtree Creek No 600 1,000
B2 Yes/No
B3 Yes/No
B4 Yes/No
B5 Yes/No
B6 - Yes/No
6h. Total Buffer Impacts: 600 1,000
6i. Comments: Buffer impacts are estimated based on observation of existing field conditions.
Page 5 of 10
D. Impact Justification and Mitigation
1. Avoidance and Minimization
1 a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
The erosional area is confined so smaller equipment will be used to make the repair. The use of smaller equipment should allow us to work mainly
within the impacted area which will minimize further disturbance of the existing NRB. Thus, we expect that areas outside the erosional feature will be
protected at all times. The impact area will be flagged to provide the contractor with a clear reference to the work zone so that existing vegetation with
woody species are protected.
1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
All construction will be utilizing small equipment because access is limited. Also, work will be done upland from the existing NRB which will minimize
further impact to the area.
2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a. Does the project require Compensatory Mitigation for
impacts to Waters of the U.S. or Waters of the State? ? Yes ?X No
2b. If yes, mitigation is required by (check all that apply): ? DWQ ? Corps

2c. If yes, which mitigation option will be used for this
project? ? Mitigation bank

El Payment to in-lieu fee program
? Permittee Responsible Mitigation
3. Complete if Using a Mitigation Bank
3a. Name of Mitigation Bank:

3b. Credits Purchased (attach receipt and letter) Type: Choose one
Type: Choose one
Type: Choose one Quantity:
Quantity:
Quantity:
3c. Comments:
4. Complete if Makin a Payment to In-lieu Fee Program
4a. Approval letter from in-lieu fee program is attached. ? Yes
4b. Stream mitigation requested: linear feet
4c. If using stream mitigation, stream temperature: Choose one
4d. Buffer mitigation requested (DWQ only): square feet
4e. Riparian wetland mitigation requested: acres
4f. Non-riparian wetland mitigation requested: acres
4g. Coastal (tidal) wetland mitigation requested: acres
4h. Comments:
5. Complete if Using a Permittee Responsible Mitigation Plan
5a. If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan.
Page 6 of 10
PCN Form -Version 1.4 January 2009
6. Buffer Mitigation (State Regulated Riparian Buffer Rules) - required by DWQ
6a. Will the project result in an impact within a protected riparian buffer that requires
buffer mitigation? 0 Yes XQ No
6b. If yes, then identify the square feet of impact to each zone of the riparian buffer that requires mitigation. Calculate the
amount of mitigation required.

Zone 6c.
Reason for impact 6d.
Total impact
(square feet)
Multiplier 6e.
Required mitigation
(square feet)
Zone 1 3 (2 for Catawba)
Zone 2 1.5
6f. Total buffer mitigation required:
6g. If buffer mitigation is required, discuss what type of mitigation is proposed (e.g., payment to private mitigation bank,
permittee responsible riparian buffer restoration, payment into an approved in-lieu fee fund).
6h. Comments:
Page 7 of 10
E. Stormwater Management and Diffuse Flow Plan (required by DWQ)
1. Diffuse Flow Plan
1a. Does the project include or is it adjacent to protected riparian buffers identified ?X Yes ? No
within one of the NC Riparian Buffer Protection Rules?
1 b. If yes, then is a diffuse flow plan included? If no, explain why.
The repair of the erosional feature does not include a new level spreader because of the site constraints
? Yes ?X No
that include closely spaced houses that limit access, relatively steep existing embankment slopes and
erodible soil conditions. However, the repair will include construction of a plunge pool to help reduce
stormwater velocity while also providing some diffuse flow characteristics.
2. Stormwater Management Plan
2a. What is the overall percent imperviousness of this project? %
2b. Does this project require a Stormwater Management Plan? ? Yes ? No
2c. If this project DOES NOT require a Stormwater Management Plan, explain why:
2d. If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan:
2e. Who will be responsible for the review of the Stormwater Management Plan?
3. Certified Local Government Stormwater Review
3a. In which local government's jurisdiction is this project?
? Phase II
? NSW
3b. Which of the following locally-implemented stormwater management programs ? USMP
apply (check all that apply): ? Water Supply Watershed
? Other:
3c. Has the approved Stormwater Management Plan with proof of approval been ? Yes ? No
attached?
4. DWQ Stormwater Program Review
?Coastal counties
?HQW
4a. Which of the following state-implemented stormwater management programs apply ?ORW
(check all that apply): ?Session Law 2006-246
?Other:
4b. Has the approved Stormwater Management Plan with proof of approval been ? Yes ? No
attached?
5. DWQ 401 Unit Stormwater Review
5a. Does the Stormwater Management Plan meet the appropriate requirements? ? Yes ? No
5b. Have all of the 401 Unit submittal requirements been met? ? Yes ? No
Page 8 of 10
PCN Form - Version 1.4 January 2009
F. Supplementary Information
1. Environmental Documentation (DWQ Requirement)
1 a. Does the project involve an expenditure of public (federal/state/local) funds or the ? Yes ? No
use of public (federal/state) land?
1 b. If you answered "yes" to the above, does the project require preparation of an
environmental document pursuant to the requirements of the National or State ? Yes ? No
(North Carolina) Environmental Policy Act (NEPA/SEPA)?
1 c. If you answered "yes" to the above, has the document review been finalized by the
State Clearing House? (If so, attach a copy of the NEPA or SEPA final approval
? Yes
? No
letter.)
Comments:
2. Violations (DWQ Requirement)
2a. Is the site in violation of DWQ Wetland Rules (15A NCAC 2H .0500), Isolated
Wetland Rules (15A NCAC 2H .1300), DWQ Surface Water or Wetland Standards, ?Yes ?X No
or Riparian Buffer Rules (15A NCAC 2B .0200)?
2b. Is this an after-the-fact permit application? ?Yes No
2c. If you answered "yes" to one or both of the above questions, provide an explanation of the violation(s):
3. Cumulative Impacts (DWQ Requirement)
3a. Will this project (based on past and reasonably anticipated future impacts) result in ?Yes X? No
additional development, which could impact nearby downstream water quality?
3b. If you answered "yes" to the above, submit a qualitative or quantitative cumulative impact analysis in accordance with the
most recent DWQ policy. If you answered "no," provide a short narrative description.
The site of the area requiring repair is within a fully developed residential subdivision.
4. Sewage Disposal (DWQ Requirement)
4a. 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.
Page 9 of 10
PCN Form -Version 1.4 January 2009
S. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or
habitat? ? Yes ? No
5b. Have you checked with the USFWS concerning Endangered Species Act
impacts? ?Yes ? No
5c. If yes, indicate the USFWS Field Office you have contacted. -
5d. What data sources did you use to determine whetheryour site would impact Endangered Species or Designated Critical
Habitat?
6. Essential Fish Habitat (Corps Requirement)
6a. Will this project occur in or near an area designated as essential fish habitat? ? Yes ? No
6b. What data sources did you use to determine whether your site would impact Essential Fish Habitat?
7. Historic or Prehistoric Cultural Resources (Corps Requirement)
7a. Will this project occur in or near an area that the state, federal or tribal
governments have designated as having historic or cultural preservation
status (e.g., National Historic Trust designation or properties. significant. in
North Carolina history and archaeology)?
? Yes ? No
7b. What data sources did you use to determine whether your site would impact historic or archeological resources?
8. Flood Zone Designation (Corps Requirement)
8a. Will this project occur in a FEMA-designated 100-year floodplain? ? Yes ? No
8b. If yes, explain how project meets FEMA requirements:
8c. What source(s) did you use to make the floodpiain determination?

}? of
rl
Applicant/Agent's Printed Name _
Applicant/Ag is Signature
(Agent's signature is vd only If an authorization.
letter from the applicant is provided.) Date,
Page 10 of 10

Geotechrical and CanstrucG ?n Matey als Testing Services
June 9, 2011
Peter Cnossen, P.E.
JONES & CNOSSEN ENGINEERING
P.O. Box 1062
Apex, NC 27502
Re: Recommendation for Stabilization of Erosion Feature
6009 Ricker Road
Raleigh, North Carolina
GeoTechnologies Project No. 1-11-0358-EA
Gentlemen:
GeoTechnologies, Inc. performed a site inspection at 6009 Ricker Road in Raleigh, North Carolina in
order to develop recommendations for stabilizing an erosion feature which exists below a discharge pipe on a
slope behind existing homes. The pipe discharges part way up the slope and is a smaller diameter pipe which
ties into a much larger pipe. It is our understanding that water is collected in the larger pipe during storm events,
and that the water then is released through the smaller pipe into the drainage feature. The original design
included a level spreader at the discharge end, however, since installation of the project in about 2001 to 2003,
very significant erosion has occurred below the discharge end.
The erosion feature now has near vertical side banks as high as 5 to 6 feet, and the feature appears to be
30 to 40 feet in width extending from just below the pipe to within about 15 feet of the existing creek. At the
discharge end, an approximately 4 to 5 foot high bank has been created, and the water which collects within the
erosion feature flows through an approximately 4 foot wide opening which looks much like a breach in an
embankment dam. Compounding the problem, a white oak which previously existed between the end of the
erosion feature and the creek has fallen over resulting in additional erosion behind the stream bank. Based on
visual observation of the stream bank, it appears that that stream may run as much as three-quarters full during
some storm events adding to the erosion at the downstream end. Based on the size of the erosion gulley which
has developed, it appears that significant volumes and velocities of water are occurring within the drainage
feature during storm events. The area is extremely difficult to access and getting to the area with bulldozers and
compaction equipment to completely rework the area will be difficult.
Based on the preceding considerations, it is our opinion that the best repair will be to clean out the
debris and existing rip rap within the basin area, shape the bottom slightly to allow installation of a heavy
nonwoven geotextile fabric, and to then place the nonwoven geotextile fabric and cover it with stone. Ideally, 6
to 8 inches of #57 stone should be placed on the fabric where the grade is flat enough that the stone will stay on
it. A class #2 rip rap should then be placed over the #57 stone to reshape the feature and create a collection
channel. Ideally, that collection channel should be shaped to create a shallow plunge pool near the discharge end
of the feature. We suggest not tacking geotextile fabric directly against the existing penetration through the
lower end of the erosion feature.
By creating the general shape shown on the attached Figure 1, water which exits through the pipe will
be contained within a rip rap channel, and the velocity of the water should be substantially reduced by passing
3200 WVellirgton Court, Suite 108 • Raleigh, North Carolina 27615 - Phone [phone] Fax [phone] • www.geotechpa.com

Jones & Cnossen
Re: 6009 Ricker Rd.
June 9, 2011
Page: 2
through the rip rap and the plunge pool at the discharge end. The water will exit the erosion feature and
eventually will open up the final 5 to 10 feet to the creek creating a straight path to the creek. However, the
proposed installation should prevent future erosion within the current eroded channel.
Please contact us if you have questions regarding this information or if we can be of any further
assistance.
Sincerely,
GeoTechnologies, Inc.

Edward B. Hearn, P.E.
NC Registration No. 9520
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