HomeMy WebLinkAbout20110286 Ver 2_401 Application_20131113lk- oagcoY2-
T.E. ALLEN ENGINEERING, P.C.
Post Office Box 103
Rosman, North Carolina 28772
Phone (828) 8774883 Firm # C -1997 Mobile (828) 553 -3004
October 8, 2013
SUBJECT: Safee Residence, Stream Restoration and Sediment Removal, 2748 West
Club Blvd., Lake Toxaway, Transylvania County, NC
NC DWQ, 401/Wetlands Unit
1650 Mail Service Center
Raleigh, NC 27699 -1650
Dear DWQ:
Enclosed, please find five (5) copies of the 401/404 application (PCN form). A check
for the application review fee is also enclosed. This project is for a stream restoration and
sediment removal at an unnamed tributary to Lake Toxaway, Transylvania County, North
Carolina. Lake Toxaway as B; Tr. The total length of proposed stream restoration is
approximately 240 linear feet. See attached Sketches SK -1 thru SK -5.
By copv Lthis letter, a trout buffer variance is hereby requested from the NCDENR —
Division of Land Resources QXgMlicable). The buffer disturbance will exceed ten
percent of the stream frontage. All disturbed areas not to be filled or flooded will be
vegetated pursuant to the seeding schedule in the Erosion and Sediment Control Planning
and Design Manual. If you have any questions or require any additional information,
please do not hesitate to contact me at (828) 877 -4883 or email tealleneng&a,citcom.net.
Enclosures
Sincerely,
f WL
Te �E.Allen, P.E.
Consulting Engineer
5 copies of 401/404 PCN Application Form
Check for application review fee
Q
NOV 1 2 2013
Copy Furnish w/ attachment:
401 PERMITTING
Mr. Kevin Barnett
NCDENR Division of Water Quality
2090 US Hwy 70
Swannanoa, NC 28778
828 - 296 -4500
NC FISH & WILDLIFE PERMITTING
NC Wildlife Res. Commission
Old Fish Hatchery
Attn: Mr. Dave McHenry
20830 Great Smoky Mtn. Expressway
Waynesville, NC 28786
USACE 404 PERMITTING
Mr. Steve Kichefski
Asheville Regulatory Field Office
US Army Corps of Engineers
151 Patton Ave, Room 208
Asheville, NC 28801 -5006
TROUT BUFFER VARIANCE
Mr. Gray Hauser, Jr., PE
Division of Land Resources
Land Quality Section
1612 Mail Service Center
Raleigh, NC 27699 -1612
1 copy of 401/404 PCN Application Form
and Sketches SK -1 thru SK -5
1 copy of 401/404 PCN Application Form
and Sketches SK -1 thru SK -5
1 copy of 401/404 PCN Application Form
and Sketches SK -1 thru SK -5
1 copy of 401/404 PCN Application Form
and Sketches SK -1 thru SK -5
J
i A
`O�ot WA TF191
O <
I -0a$ LO v a-.
Office Use Only:
Corps action ID no.
DWQ project no.
Form Version 1.3 Dec 10 2008
Pre - Construction Notification C Form
A. AppHcant Information
1. Processing
1 a. Type(s) of approval sought from the
Corps:
®Section 404 Permit El Section 10 kemtit
1 b. Specify Nationwide Permit (NWP) number: 27 - Stream Restoration, 13 & 18 or General Permit (GP) number:
1c. Has the NWP or GP number been verified by the Corps?
® Yes ❑ No
1d. 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 ❑ 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
1f. 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 ® No
1g. Is the project located in any of NC's twenty coastal counties. If yes, answer 1 h
below.
❑ Yes ® No
1 h. Is the project located within a NC DCM Area of Environmental Concern (AEC)?
❑ Yes ® No
2. Project Information
2a. Name of project:
STREAM RESTORATION and SEDIMENT REMOVAL
2b. County:
Transylvania
2c. Nearest municipality / town:
Brevard
2d. Subdivision name:
Lake Toxaway
2e. NCDOT only, T.I.P. or state
project no:
3. Owner Information
3a. Name(s) on Recorded Deed:
Edward F. Safee and wife, Natalie Safee
3b. Deed Book and Page No.
Book 634, Page 676 - 681
3c. Responsible Party (for LLC if
applicable):
3d. Street address:
2748 West Club Blvd. (Lot No. 122 of Block BB of Lake Toxaway Co.)
3e. City, state, zip:
Lake Toxaway, NC 28747
3f. Telephone no.:
727 -423 -7088
3g. Fax no.:
fia
'
3h. Email address:
I I E-_—�L
NOUY22013 v
W A t/t
Page 1 of 11 Fes'
PCN Form — Version 1.3 December 10, 2008 Version
4. Applicant Information (if different from owner)
4a. Applicant is:
❑ Agent ❑ Other, specify:
4b. Name:
4c. Business name
(if applicable):
4d. Street address:
4e. City, state, zip:
4f. Telephone no.:
4g. Fax no.:
4h. Email address:
S. AgentlConsultant Information (if applicable)
5a. Name:
5b. Business name
(if applicable):
5c. Street address:
5d. City, state, zip:
5e. Telephone no.:
5f. Fax no.:
5g. Email address:
Page 2 of 11
PCN Form — Version 1.3 December 10, 2008 Version
B. Project Information and Prior Project History
1. Property Identification
1a. Property identification no. (tax PIN or parcel ID):
1b. Site coordinates (in decimal degrees):
Latitude: 35.130678 Longitude: - 82.95382
(DD.DDDDDD) (- DD.DDDDDD)
1c. Property size:
1.52 acres
2. Surface Waters
2a. Name of nearest body of water (stream, river, etc.) to
Lake Toxaway
proposed project:
2b. Water Quality Classification of nearest receiving water:
B, Trout
2c. River basin:
Savannah
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:
This parcel is wooded and undeveloped and is located in Toxaway Estates, a private residential development in western
Transylvania County, NC. The lot has several un -named tributaries and drain directly into Lake Toxaway which has a
classification of B: Trout. The general land use is residential.
3b. List the total estimated acreage of all existing wetlands on the property:
none
3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property:
none
3d. Explain the purpose of the proposed project:
Remove accumulated sediment in streams, stabilize banks, install grade control boulder weirs to create step pools to trap
future sediment and improve water quality. The site and streams receive runoff directly from the Toxaway Golf Course.
3e. Describe the overall project in detail, including the type of equipment to be used:
Remove approximately 50 cubic yards of sediment, construct approximately 240 linear feet of boulder stream bank
stabilization. Install 115 lienar feet for boulder weirs for grade control & step pools. See attached Sketches SK1 thru
SK5.
The overall length of the proposed stream bank stabilization shall not exceed 240 linear feet. Stabilization structure to be
natural granite boulders, class 2 dprap gradation. The structure for the grade control weirs shall also be natural granite
boulders. Where it is necessary to create a dry work area, all dewatering discharge shall have a turbidity of not more
than 10 NTUs above background or as otherwise specified in DWQ's Turbidity Standards (15A NCAC 02B.0211(3.)(k.)).
To satisfy the required turbidity limit, the dewatering pump discharge shall be filtered through a Bag Filtration Unit equal to
Model BF400 from Rain - for -Rent with a 100 to 1 micron nominal rating (P.O.C. at Rain - for -Rent is Jeremy at 704 -393-
3345). The turbidity level of all discharge shall be monitored with calibrated turbidity meters and the filtration equipment
shall be adjusted as necessary to insure compliance with Water Quality Standards. Downstream water shall likewise be
monitored with calibrated turbidity meters to insure compliance with Water Quality Standards.
Uncured concrete shall not be allowed to come into direct contact with surface waters. This will be accomplished by
establishing a "dry work area" as described above. "High Early" cementious material shall be in the stone work to
minimize curing time.
Page 3 of 11
PCN Form —Version 1.3 December 10, 2008 Version
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?
Comments:
❑ Yes ® No ❑ Unknown
4b.
If the Corps made the jurisdictional determination, what type
of determination was made?
❑ preliminary ❑ Final
4c.
If yes, who delineated the jurisdictional areas?
Name (if known):
Agency /Consultant Company:
Other:
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?
❑ Yes ® No ❑ Unknown
5b.
If yes, explain in detail according to "help file" instructions.
6.
Future Project Plans
6a.
Is this a phased project?
❑ Yes ® No
6b.
If yes, explain.
Page 4 of 11
PCN Form — Version 1.3 December 10, 2008 Version
C. Proposed Impacts Inventory
1. Impacts Summary
1 a. Which sections were completed below for your project (check all that apply):
❑ Wetlands ❑ Streams - tributaries ❑ 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.
2b.
2c.
2d.
2e.
2f.
Wetland impact
Type of jurisdiction
number —
Type of impact
Type of wetland
Forested
(Corps - 404, 10
Area of impact
Permanent (P) or
(if known)
DWQ — non -404, other)
(acres)
Temporary
W1 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
W2 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
W3 ❑ P [IT
❑ Yes
❑ Corps
❑ No
❑ DWQ
W4 ❑ P [IT
❑ Yes
❑ Corps
❑ No
❑ DWQ
W5 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
W6 ❑ P ❑ T
❑ Yes
❑ No
❑ Corps
❑ DWQ
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.
3b.
3c.
3d.
3e.
3f.
3g.
Stream impact
Type of impact
Stream name
Perennial
Type of jurisdiction
Average
Impact
number -
(PER) or
(Corps - 404, 10
stream
length
Permanent (P) or
intermittent
DWQ — non -404,
width
(linear
Temporary (T)
(INT)?
other)
(feet)
feet)
S1 ❑ P ®T
Stream Bank
Stabalization
Un -named
Tributary to Lake
® PER
❑ INT
® Corps
® DWQ
15
240
Toxaway
S2 ❑ P ®T
Grade Control
Weirs
Un -named
Tributary to Lake
PER
E3 INT
®Corps
®DWQ
15
115
Toxaway
S3 ❑ P [IT
❑ PER
❑ INT
❑ Corps
❑ DWQ
S4 ❑ P [IT
❑ PER
❑ Corps
❑ INT
❑ DWQ
S5 ❑ P ❑ T
❑ PER
❑ Corps
❑ INT
❑ DWQ
S6 ❑ P ❑ T
❑ PER
❑ Corps
❑ INT
❑ DWQ
3h. Total stream and tributary impacts
355
3i. Comments:
Page 5 of 11
PCN Form — Version 1.3 December 10, 2008 Version
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 individually list all open water impacts below.
4a.
4b.
4c.
4d.
4e.
Open water
Name of waterbody
impact number—
(if applicable)
Type of impact
Waterbody type
Area of impact (acres)
Permanent (P) or
Temporary
01 ❑ P ® T
Lake Toxaway
Lake
02 ❑P ❑T
03 ❑P ❑T
04 ❑P ❑T
4E Total open water impacts
0
4g. Comments: Dredging work will be accomplished "in the wet" while the lake level is at normal pool elevation. Dredging with
small excavator with minimual incidental fall back. Turbidity curtains will be used to isolate the work areas and curtains will
remain in place until the turbidity in the work area is less than 10 NTUs above background. Upland disposal site with have no
return water and no wetlands will be impacted.
Seawall work will be accomplished "in the dry" by installing a temporary coffer dam around the proposed work area. The
dewatering discharge will be filtered to DWQ Water Quality Standards prior to release.
5. Pond or Lake Construction
If pond or lake construction proposed, then complete the chart below.
5a.
5b.
5c.
5d.
5e.
Wetland Impacts (acres)
Stream Impacts (feet)
Upland
Pond ID
Proposed use or purpose
(acres)
number
of pond
Flooded
Filled
Excavated
Flooded
Filled
Excavated
Flooded
P1
P2
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:
Page 6 of 11
PCN Form — Version 1.3 December 10, 2008 Version
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 any impacts require mitigation, then you MUST fill out Section D of this form.
6a.
❑ Neuse El Tar-Pamlico El Other:
Project is in which protected basin?
❑ Catawba ❑ Randleman
6b.
6c.
6d.
6e.
6f.
6g.
Buffer impact
number —
Reason
Buffer
Zone 1 impact
Zone 2 impact
Permanent (P) or
for
Stream name
mitigation
(square feet)
(square feet)
Temporary
impact
required?
131 ®P ❑T
❑Yes
❑ No
B2 ❑P ❑T
❑Yes
❑ No
B3 ❑P ❑T
❑Yes
❑ No
6h. Total buffer impacts
6i. Comments:
D. Impact Justification and Mitigation
1. Avoidance and Minimization
1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
Only low impact construction methods were specified. A dry work area will be created.
1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
To minimize disturbance during construction, the work will be accomplished with the smallest mechanical equipment
practicable.
Work will be accomplished "in the dry" by installing a temporary coffer dam around the proposed work area. The dewatering
discharge will be filtered to DWQ Water Quality Standards prior to release.
2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a. Does the project require Compensatory Mitigation for
❑ Yes ® No
impacts to Waters of the U.S. or Waters of the State?
2b. If yes, mitigation is required by (check all that apply):
❑ DWQ ❑ Corps
❑ Mitigation bank
2c. If yes, which mitigation option will be used for this
El Payment to in -lieu fee program
project?
❑ Permittee Responsible Mitigation
3. Complete if Using a Mitigation Bank
3a. Name of Mitigation Bank:
3b. Credits Purchased (attach receipt and letter)
Type
Quantity
Page 7 of 11
PCN Form — Version 1.3 December 10, 2008 Version
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
❑ 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.
❑ Yes ❑ No
Comments:
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:
❑ Certified Local Government
2e. Who will be responsible for the review of the Stormwater Management Plan?
❑ DWQ Stormwater Program
❑ DWQ 401 Unit
3. Certified Local Government Stormwater Review
3a. In which local government's jurisdiction is this project?
❑ Phase II
3b. Which of the following locally- implemented stormwater management programs
❑ NSW
❑ 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 9 of 11
PCN Form — Version 1.3 December 10, 2008 Version
3c. Comments:
4. Complete If Making 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:
❑ warm ❑ cool []cold
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:
6. Complete If Using a Permittee Responsible Mitigation Plan
5a. If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan.
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?
❑ Yes ❑ 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: Should project exceed 10% or 100' in 1000', a trout buffer waiver will be sought from NCDENR - Div of Land
Resources
Page 8 of 11
PCN Form — Version 1.3 December 10, 2008 Version
F. Supplementary Information
1. Environmental Documentation (DWQ Requirement)
1 a. Does the project involve an expenditure of public (federal /stateAocal) 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)?
1c. 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 ® 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 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.
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.
N.A.
Page 10 of 11
PCN Form —Version 1.3 December 10, 2008 Version
6, endangered Species and Designated CrWeat Habitat (COM iRaqutrement)
5a. Will thlo project occur' in or near an arm with federally protected spades or ❑ Yes ®No
habitat?
5b Have you chooued with the USPwS conceming Endangered Species Act 0 Yes ® No
impact? _
❑ Raleigh
Raleig(!e
5c. if yes, indreate the USFWS FIWd Office you hoe contacted, p
5d, What data sources old you use to detervnN wttathar your site would Impact EndariWad Species or Designated CfWcai
i tabitat?
8. EnaniJal Fhrh Habttat (Corps PApImmentj
6a. Will this prajvd occur In or near an ergo designated an easenW fish hebhe?
❑ Yes 1 No
8b. What date sources did you use to deterndnr whether your milts would lmpact ftwtlf Fish t-tapitr117
7. Historic or Prehistoric Cultural Resources (Corp Requirement)
7a. Wim this p *ed occur in or now an area thS the ate, federal or Mal
governments have designated as having FirstWO or CtlttUMI pre wmation Yes No
status (e,g., Notional Historic ThW designation or pru penles al riftent in
North Carolina history and archa*01M)?
7b. What data swices did you uae to detemtine whctner your site would Irroact hlooft or archeological rrasources7
fl. Flood zone Designation (Corps RequiremenQ
80. WIN mnis project occur In a FEMA detlgnoted loo-yaw floodplaln?
[1 Yes ❑ No
8b. it yes, soaln how prgoo P%M FEMA requirements:
Sc. What source(p) did you use to make ms floodPlaln lion?
Edward F. Safiee
���� /
/0—
Natalie Safee
J 4'�``-t--
e,
Applicant/Agen 819natum
Data
Applrcant/Aganre printed Name
(Agwta eipnot r* is vell0 miy M A aw4 tzo" wmr from the aPPacw t
Is wirilded.)
Page 11 Of 11
PCN Form w Vettiw 1.3 December 10, 2008 Version
STREAM RESTORATION & SEDIMENT REMOVAL PLAN
SAFEE REmDENCE9 LAKE Il OX/nIWLz111 y INC
SCOPE —OF —WORK
This work shall include removing accumulated sediment along
two (2) parallel stream sections; construction of 240 Linear
Feet of natural granite boulder bank stabilization; and
installing two (2) grade control weirs and step pools as
shown. The sediment removal work is to be performed
"in— the —wet" while the streams are at a low flow condition.
Special turbidity control measures are required to insure
compliance with NCDENR Water Quality Standards. Remove
sediment shall be performed by bucket and shovel or
mechanized equipment (where allowable by permit). A
turbidity threshold of 10 NTUs above background shall not be
exceeded. Install natural boulder grade control weirs as
shown.
GENERAL NOTES.
1.0 The Contractor shall obtain all required permits prior to
beginning work. This work may require a "Certificate of
Approval" from the NCDENR Division of Land Resources, Land
Quality Section; US Army Corps of Engineers Section 404
wetlands permit; and NCDENR Division of Water Quality
Section 401 Water Quality Permit, Sedimentation & Erosion
Control Permit, and other permits deemed necessary by
authorities having jurisdiction over the projects.
2.0 All work shall be in accordance with the latest edition
of the North Carolina State Building Code, NCDENR Division of
Land Quality & Division of Water Quality Requirements, OSHA
Safety and Health Requirements, ACI 301 — Specifications for
Structural Concrete, ACI 318 — Building Code Requirements
for Structural Concrete, NC Sedimentation Pollution Control
Act, and all other applicable codes, ordinances, and
regulations.
3.0 The Contractor shall locate, flag, and protect all
existing utilities prior to beginning work. Verify all
dimensions and elevations prior to beginning work or ordering
materials. Land disturbing activities shall not exceed 1 acre.
4.0 The Contractor's construction activities shall be
performed by methods that will prevent entrance, or
accidental spillage, of solid matter, contaminants, debris, or
other pollutants and wastes into streams, flowing or dry
watercourses, lakes or underground water sources.
PRELIMINARY NOT FOR CONSTRUCTION
5.0 EARTHWORK. Satisfactory materials shall be placed in 6"
compacted lifts. Material shall be compacted to 95% of the
maximum dry density. Classification of backfill materials
shall be determined in accordance with ASTM D 2487 and
the moisture— density relations of soils shall be determined in
accordance with ASTM D 698. A minimum of one soil
classification and one moisture — density relation test shall be
performed on each different type of material used for
bedding and backfill. Field in —place density shall be
determined in accordance with ASTM D 698.
6.0 Ground cover shall be established on exposed slopes
within 10 calendar days following completion of any phase of
grading and permanent ground cover shall be established on
all disturbed areas within 14 calendar days following
completion of each respective phase of construction.
7.0 The Contractor shall furnish and install all required
erosion control features prior to beginning work. All erosion
control measures shall be inspected and maintained on a
routine basis. All Silt Fence, stone check dams, ditches,
culverts and sediment traps shall be maintained. Any
accumulated sediments shall be removed as needed.
8.0 All monitoring and inspections shall also be in
accordance with conditions of the Sedimentation & Erosion
Control Permit; Construction Stormwater Permit NCG010000,
401 certification, and stream standards.
9.0 By accepting this plan, you and any others to whom it
is distributed, agree to a strict limitation of liability for Terry
E. Allen PE, T.E. ALLEN ENGINEERING, P.C., and its employees
to an amount not to exceed the fee paid in hand.
10.0 ASBUILT RECORD DRAWINGS. The Contractor shall
maintain a full size set of the approved plans on site at all
times. The Contractor shall annotate the plans using red ink
to reflect all changes, adjustments and modifications. The
exact location and elevations of all major features —of —work
shall be recorded. Two (2) sets of these annotated
marked —up drawings, along with two (2) sets of the
downstream monitoring documentation, shall be delivered to
the Engineer at the completion of work. The Contractor
shall also provide an asbuilt topographic survey of the work
area to be included with the As —Built Drawings.
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SHEET 1 OF 5
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SEED SPECIFICATIONS FOR THE 25 —FOOT BUFFER ZONE:
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1. Planting and Seeding in the 25 —foot buffer zone adjacent
to trout waters shall be in accordance with the document
entitled "Guidelines for Riparian Buffer Restoration ", N.C.
Department of Environment and Natural Resources, Ecosystem
Enhancement Program, October 2004.
2. Grasses and woody vegetaton in the buffer shall be
native plant specs. For lawn areas, the blend of native
varieties shall be Kentucky Bluegrass (Poa pratensis L. ssp.
pratensis) and (Festuca rubra L. ssp. rubra).
APPLICATION RATES
Red Fescue 52 Lb /Acre
Kentucky Bluegrass 13 Lb /Acre
3. All work shall be carried out by an approved spraying
machine specially used for this work. The Contractor shall
submit to the Landscape Architect for approval (prior to
start of work) a certified statement as to number of pounds
of fertilizer,amounts and types of grass seed, and processed
fiber, per 100 gallons of water.
4. Soil Amendments. Follow recommendations of soil tests
or apply 4,000 lb/acre ground agricultural limestone and
1,000 lb /acre 5 -10 -10 fertilizer.
5. Mulch. Apply 4,000 — 5000 lb /acre grain straw.
Anchor mulch by tacking with asphalt, roving, or netting.
Netting is the preferred anchoring method on steep slopes.
6. Maintenance. Do not mow crown vetch. Refertilize in
the second year unless growth is fully adequate. Reseed,
fertilize, and mulch damaged areas immediately.
7. Control of Grosses and Forbs. In the early stages of
riparian buffer establishment, competition for nutrients by
adjacent grasses and forbs will substantially inhibit seedling
growth. Release from herbaceous competition has been
demonstrated as the most cost — effective method to
accelerate the growth of seedlings. The plan for buffer
establishment shall incorporate control of the herbaceous
layer. Options for weed control include four to six inches of
well —aged hardwood mulch, weed control fabrics, or
pre— emergent herbicide. Typically, mowing to control weeds
will be impractical based on the random distribution of
plantings. Weed control should be continued for three years
from the time of planting.
PRELIMINARY NOT FOR CONSTRUCTION
8. Areas of Concentrated Flow. During the establishment 3 a
period, the riparian buffer should be inspected for evidence ? co
of concentrated flow. If concentrated flow has begun to form, ?c,
a level spreader or other best management practice should z0Z�
be installed to diffuse the flow before it enters the restored °O�o ;o
riparian buffer. El m o x� N
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2.0 DOWNSTREAM MONITORING (per DWQ)
2.1 Before work begins the receiving stream shall be
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monitoring locations. DWQ will review this information to
evaluated by the Contractor. Depending on the downstream
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reach at least 3 locations shall be established for monitoring.
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Initial cross sections are to be performed. Photo
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documentation of these locations shall also be provided.
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2.2 Downstream waters shall be monitored eriodicall
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(minimum of weekly) while work is being performed. The
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withdrawal or repair work should be discontinued if
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downstream waters are turbid or if sediment is released. If
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sediment is released or turbid waters persists contact DWQ
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within twenty four hours for guidance. If sediment loss
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impacts the receiving stream then sediment removal will be
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sandbags at the lake /pond headwaters and siphoning around
required under DWQ approval.
2.3 Once work is completed another cross section and
photo documentation shall be performed at the set
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monitoring locations. DWQ will review this information to
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confirm stream impacts have not occurred.
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2.4 Sediment must be prevented from reaching surface
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waters during the lake /pond drawdown. The withdrawal
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fixture should be placed at or near the surface with floats
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(and water level reduced by no more than one vertical foot
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per day, in accordance with Dam Safety Guidelines).
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2.5. While work is being performed at the dam, the
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lake /pond should be isolated from moving water (i.e., via
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sandbags at the lake /pond headwaters and siphoning around
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the lake, or other means necessary to perform work "in the
dry"). However, flow to the receiving waters should not be
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removed or reduced to a level detrimental to aquatic life.
2.6 After the impoundment is drained, install sediment and scow
erosion control structures and /or hydroseeding as be am
necessary to stabilize exposed soil and sediment (or other —HREOR soak
method of stabilization). "°"`
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2.7. Prior to beginning work the Owner shall attempt to
remove fish from the pond to lessen the impact of the SK2
drawdown on the aquatic life. SHEET 2OF5
EXISTING STREAM BED LOCATION \
LARGE WOOD STRUCTURE KEYS, STREAM RESTORATION &SEDIMENT R�EMOV�LpIPLAN
W/ TRUNK BURIED INTO BANK. \ OOL #1 any others to whom it is distributed, agree
TYPICAL Approximate Vol = 0.2 Acre -Ft to a strict limitation of liability for Terry E.
Approximate Surface Area = 2,700 SF Allen PE, T.E. ALLEN ENGINEERING, P.C., and
PP its employees to an amount not to exceed
the fee paid in hand.
BANK STABILIZATION MATH
NATURAL GRANITE RIPRAP, SIZE•- �:=,'" =` r
GRADATION MEETING NCDOT CLASS ��f #
2 RIPRAP. 240 LF TOTAL ti. " ": = : =• -'``•`' ,�• I POOL 2
':=
OVERALL LENGTH OF RIPRAP BANK' Approximate Vol = 0.2 Acre -Ft
STABILIZATION. i .' Approximate Surface Area 2,829 SF
�� LOT NO. 122, BLOCK BB
LIN , • 1.52 ACRES +/ POOL #3
4*3 ��� - �S '/ i`. • /��/ �i f-� r' Approximate Vol = 0.1 Acre -Ft
�C, Approximate Surface Area = 1,360 SF
GRADE CONTROL WEIR /`q/ ` (� I • �/` • ��
#1, 65 LF. NATURAL
GRANITE BOULDERS 'fc �� \� �� �� �! / . • /� �' i \
WITH AVERAGE SIZE �D
18' X24' X48" i \
�, 20'X20' GAZABO
EXISTING CULVERT I �/ `. �i •�;Y }' Y II 1`\\ �`\ \�`� ��� ` 'ol
UNDER ROAD S
(DESIGNED BY OTHERS) �N - -- t j- " i'J \_ • ��� \\ y \
TO LAKE TOXAWAY . I �'` ��� {� _� ` �• '��\ \
CULVERT OUTLET INVERT 3015.1
FT, FROM RAXTER SURVEY �bl /
TO LAKE TOXAWAY _ rt / J • / • •
EXISTING CULVERT UNDER ROAD (DESIGNED BY OTHERS) / • "' `�- ` \`�`^ \�� ��
CULVERT INLET INVERT 3015.3 FT, FROM RAXTER SURVEY �`. - ,��•�- - -� ��\ `�
BANK STABILIZATION MATH NATURAL GRANITE RIPRAP, SIZE
GRADATION MEETING NCDOT CLASS 2 RIPRAP. 240 LF
TOTAL OVERALL LENGTH OF RIPRAP BANK STABILIZATION.
GRADE CONTROL WEIR 02, 50 LF. NATURAL GRANITE BOULDERS MATH
AVERAGE SIZE 18 "X24' X48"
LARGE WOOD STRUCTURE KEYS, W/ TRUNK BURIED INTO BANK. TYPICAL
TIMBER CART BRIDGE ACROSS POOL. ALIGNMENT OF CART PATH AND BRIDGE SHALL
BE FIELD ADJUSTED TO ACHIEVE THE BEST FIT.
,r j -'\ STREAM RESTORATION & SEDIMENT REMOVAL PLAN
Not to Scale
EXISTING STREAM
` _ Y BED LOCATION
50-FT STANDARD
.-� \• t' �� T �� SETBACK FOR
SEPTIC SYSTEM
I I (• �� [.1950(a)]
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topography, etc., was provided by
Roger Roxter, PLS. These
drawings shall not be considered
an official land survey and shall
not be relied upon for survey
Information. See Official Land
prepared by Roger Raxter, PLS.
NOT FOR
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SK3
SHEET 3 OF 5
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top bp°
(structure keys)
PLAN
8" THICK BINTONTE CLAY BLANKET ACROSS
UPSTREAM SLOPE OF GRAVE CONTROL WEIR
SPECIAL NOTE. Some portions of this work may occur
beyond or outside the property line and within the private
road right —of —way or on adjacent Property Owners land. The
Owner/ Contractor shall obtain all required authorizations,
easements, rights —of —way and rights —of —entry prior to
beginning work beyond the subject property boundaries. All
property boundaries shall be located and marked by a NC
Registered Professional Land Surveyor prior to beginning work.
See Sheets R -1 and R -2 for additional requirements.
large wJ0d
(structure keys)
channel width (CW)
ordinary
high water-
SECTION
channel
bottom
PROFILE
1 GRADE CONTROL WEIR
SK4 Not to Scale
PRELIMINARY NOT FOR CONSTRUCTION
0 "large wood
-ft (structure keys)
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SHEET 4OF5
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Accumulation of sedimentation in stream bed
removed by hand means (bucket and shovel)
No wheeled or mechanized equipment shall be
Average Stream Width
is approx 15 —FT
shall be
only.
used. -
PRE — REMOVAL CROSS SECTION
(SEDIMENT TO BE REMOVED BY HAND)
(HAND WORK ONLY)
1 SEDIMENT REMOVAL from STREAMBED
SK5 Not to Scale
PRELIMINARY NOT FOR CONSTRUCTION
NOTES
1. No work shall be undertaken within
streams or buffers between October
15th and April 15th or as otherwise
specified by the NCDENR or NC Fish &
Wildlife.
2. Stream bed and streambank to be
stabilized after sediment removal.
3. Should the impacted area extend of
property, the Contractor shall obtain
"Right —of— Entry" from adjacent
Property Owner prior to beginning work.
4. The type and density of
reestablished vegetation shall match
adjacent undisturbed areas.
Restore Downstream Impacted
areas. Reestablish indigenous
aquatic zone, bank zone and
shrub zone vegetation.
Reestablished vegetation in the
shrub zone shall be by "cutting
between riprap ". The type and
density of reestablished
vegetation shall match adjacent
undisturbed areas.
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08-27 -2013
SK5
SHEET 5 OF 5