HomeMy WebLinkAbout20120172 Ver 1_Amberliegh Ph 2 Response to USACE RFAI_20180523Strickland, Bev
From: dlutheran@segi.us
Sent: Wednesday, May 23, 2018 1:57 PM
To: 'Capito, Rachel A CIV USARMY CESAW (US)'
Cc: Coburn, Chad; Montalvo, Sheri A
Subject: [External] RE: Amberleigh Shores Phase II RAI
Attachments: Amberliegh Ph 2 Response to USACE RFAI 5-23-18.pdf
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Hello, Rachel.
Attached you will find the response to your RFAI. As you will see, I broke down each of the 6 paragraphs, where
necessary, into subitems, in order to address all of your requests.
It is my hope that the information provided will be sufficient to complete the PCN. Should you have any questions or
concerns, please give me a call at 910.228.1841.
Thank you for your assistance with this project. I look forward to hearing from you.
Dana
Southern Environmental Group, Inc.
5315 South College Road, Suite E
Wilmington, NC 28412
Office: 910.452.2711
Mobile: 910.228.1841
www.segi.us
-----Original Message -----
From: Capito, Rachel A CIV USARMY CESAW (US) <Rachel.A.Capito@usace.army.mil>
Sent: Friday, May 18, 2018 9:33 AM
To: dlutheran@segi.us
Subject: Amberleigh Shores Phase II RAI
Dana,
Please accept this as official correspondence for the Amberleigh Shores Phase II project. The following information is
required for a complete application review and permit issuance.
1. Please provide a description of the Amberleigh Phase I and any
future proposed phases. Please include information demonstrating that all proposed infrastructure (roads, utilities,
stormwater facilities, etc.) for this project has utility independent of any past or future development. If the proposed
project will share any infrastructure (storm water ponds, roads, utilities, etc.) with adjacent existing development or
future development, that information must be provided. If the Corps determines that Phase II is not a single and
complete project, the proposed impacts to waters of the U.S. will be evaluated cumulatively, which may result in the
project being evaluated under a Standard Permit if NWP impact thresholds are exceeded.
2. The previously permitted Amberleigh Shores Phase I required
mitigation at a ratio of 2:1. Based on the proposed 1:1 mitigation ratio for Phase 11, please provide justification such as
NCWAM for the proposed 1:1 ratio.
3. Please include drawings showing the entire proposed project,
including entrance/exit roads, storm water ponds, and parking areas and label buildings for their specified use.
Information and drawings related to the entire development are necessary to evaluate avoidance and minimization
measures. The drawings should also indicate any vegetated buffers proposed to protect avoided wetlands.
4. Describe potential wetland avoidance and minimization measures
including alternate site plans and other steps which would reduce impacts to on-site wetlands and other waters. This
includes information regarding alternate site configurations that were considered so that more impacts are avoided. In
the application you mention both 296 units and 287 units as the minimum number for the development, please clarify
how the minimum number of units was determined and the total number proposed for this site. Please also include the
number of parking spaces proposed and how the number of spaces was determined. The information should document
that the wetland area to be impacted is the minimum area required for the project to be practicable and meet the
project purpose.
5. Information related to proposed storm water ponds is required to
evaluate the potential for secondary hydrologic impacts to adjacent wetlands. This should include the normal pool
elevation of the ponds and the elevation of the adjacent wetlands. Please also provide dimensioned cross section
drawings for the storm water ponds and any control structures.
Provide information about impervious surface area of the new development and how directing all flow to the
stormwater pond will not have a negative impact on wetland recharge.
6. Please include on the map the proposed buffer area of trees and
shrubs between the wetlands area and built upon area. Also include information regarding the plans for landscaping for
the stormwater management pond.
As the application is considered incomplete for evaluation, no action will be taken on it until the requested information
has been received. We request you provide this information within 30 days of the date of this letter. If no response is
received by then, we will assume you have no further interest in obtaining a Department of the Army permit and the
application will be deactivated. Thank you for your cooperation with the Corps Regulatory Program. Should you have
any questions regarding this request for additional information, please let me know.
Rachel Capito
Regulatory Specialist
U.S. Army Corps of Engineers
Wilmington District
Office: 910.251.4487
Cell: 910.899.6051
Project: Amberleigh Shores Phase II Pre -Construction Notification
Subject: Response to USACE 18 May 2018 Electronic Request for Additional Information
Date: 23 May 2018
a) Please provide a description of the Amberleigh Phase I and any future proposed phases. b) Please include
information demonstrating that all proposed infrastructure (roads, utilities, stormwater facilities, etc)for this
project has utility independent of any past or future development. c) If the proposed project will share any
infrastructure (storm water ponds, roads, utilities, etc) with adjacent existing development or future
development, that information must be provided. If the Corps determines that Phase II is not a single and
complete project, the proposed impacts to waters of the U.S. will be evaluated cumulatively, which may result
in the project being evaluated under a Standard Permit if NWP impact thresholds are exceeded.
a. Amberleigh Shores Phase I has access off Market Street and March Oaks Drive. Utilities come from Marsh
Oaks Drive. The project required 0.355 -acre of permanent wetland impact. Please see the attached NWP
29 that was issued for this project (Attachment 1).
b. To my knowledge, this is the only additional phase of the Amberleigh Shores Apartments that will be
submitted for USACE and /or DWR action. Amberleigh Shores Phase II has independent utilities (i.e.
sewer and water), which will be connected to the existing utilities that are located at the back of the Three
Oaks Apartments (see Sheet C-2.0 of Attachment 2), and access, which will be off Market Street, south of
the entrance into Phase I. The proposed development will not share stormwater infrastructure. Please see
the Overall Site Plan (C-2.0 of Attachment 2) for confirmation of these statements.
2. The previously permitted Amberleigh Shores Phase I required mitigation at a ratio of 2:1. Based on the
proposed 1:1 mitigation ratio for Phase II, please provide justification such as NCWAMfor the proposed 1:1
ratio.
In preparing a mitigation proposal that meets the USACE's requirements, which is to offset unavoidable, direct
and/or indirect losses of wetland function that is anticipated to place as result of the proposed development,
SEGi relied upon several factors, which consisted of the (A) type and functional value of the existing wetland
features, (B) both direct and indirect impacts the proposed development may have on the existing features,
downstream receiving waters and the watershed, as a whole, (C) the cost associated with avoidance and
minimization efforts, and (D) the temporal lag in replacement of the anticipated wetland functions to be
removed.
A. Wetland type and Functional Value: Utilizing the NC WAM, two types of wetlands were identified within
the proposed project boundaries: Basin Wetlands (both Isolated and Non -Isolated) and Headwater Forest
Wetland.
As per the NC WAM, three wetland functions are identified for use by NC WAM: Hydrology, Water
Quality, and Habitat. Each of these primary functions has been sub -divided into sub -functions that vary
by general wetland type. The Hydrology function is divided into 1) surface storage and retention, and 2)
sub -surface storage and retention. The Water Quality function is divided into 1) particulate change, 2)
soluble change, 3) pathogen change, 4) physical change, and 5) pollution change. The first four Water
Quality sub -functions are considered for riparian wetlands, and the fifth Water Quality sub -function (a
combination of components of the first four) is considered for non -riparian wetlands. The Habitat function
is divided into 1) physical structure, 2) landscape patch structure, and 3) vegetation composition. Various
combinations of Habitat sub -functions are used for the general wetland types.
NC WAM generates functional ratings for each assessed wetland, through comparison with reference
examples of the same wetland type only (i.e. in-kind functional assessment). The selected descriptors are
converted, by a computer program (the NC WAM Rating Calculator), into a functional rating for each
Project: Amberleigh Shores Phase II Pre -Construction Notification
Subject: Response to USACE 18 May 2018 Electronic Request for Additional Information
Date: 23 May 2018
metric, as well as ratings for each sub -function (Hydrology, Water Quality, and Habitat) ratings. The sub -
function ratings are combined to generate overall function ratings. Ratings are provided as "High,"
"Medium," or "Low" relative only to other wetlands of the same type. The ratings are reported in the
Wetland Rating Sheet.
To derive these ratings, NC WAM uses indicators of wetland condition (i.e. "condition metrics") relative
to a reference wetland, as a surrogate for wetland function, thus wetland condition is used to infer wetland
function. These indicators are general measures ("metrics") of the condition of the subject wetland. An
opportunity metric considers landscape position of a wetland relative to activities on-going in the
watershed.
In NC WAM, opportunity metrics apply only to the Water Quality function. Indicators of both condition
and opportunity in the generation of Water Quality functional ratings, and condition and opportunity
indicators are analyzed independently of each other. The Wetland Rating Sheet provides 1) Water Quality
sub -function ratings based on condition metrics only, 2) Water Quality sub -function ratings based on
condition metrics as modified by the presence of an opportunity to enhance wetland function in the
watershed, and 3) an indication as to whether an opportunity to enhance wetland function is present in the
watershed.
Inserting the data collected in the field, from the assessment areas (i.e. proposed impact areas A -H), as
well as spatial data collected through GIS programs, the following table summarizes the functional ratings
calculated for each wetland feature, found within the project boundaries:
Wetland Feature
Hydrology
Water Quality
Habitat
Opportunity
Presence Y/N ?
Overall
Basin Wetland #1
High
High
Medium
N
Medium
Basin Wetland #2
High
High
Medium
N
Medium
Basin Wetland #3
High
High
Medium
N
High
Headwater Forest
High
High
High
N
High
Isolated Basin Wetland
Low
Low
Low
N
Low
Table 1 NC WAM results for each wetland feature on the property
Please refer to Attachment 3 for details of the completed NC WAM forms and corresponding map.
B. The basin wetlands to be impacted on this site, are neither adjacent or abutting surface waters (i.e. streams
and rivers). Runoff collected within these features infiltrates into the ground or is lost to evaporation and
vegetation uptake. While these wetlands collect and treat stormwater, filtering out sediments and
contaminants through the soil before it enters into surface waters, stormwater runoff entering into these
wetland systems is minimal, as the site is heavily wooded. Therefore, the wetlands located within the subject
property do not significantly affect downstream water quality, as it pertains to pollution and sediment levels,
which provides little or no opportunity for improvement of water quality conditions downstream or within
the watershed.
C. Per Section 320.4(r)(1):
Mitigation is an important aspect of the review and balancing process on many Department of the
Army permit applications. Consideration of mitigation will occur throughout the permit
N
Project: Amberleigh Shores Phase II Pre -Construction Notification
Subject: Response to USACE 18 May 2018 Electronic Request for Additional Information
Date: 23 May 2018
application review process and includes avoiding, minimizing, rectifying, reducing, or
compensating for resource losses. Losses will be avoided to the extent practicable. Compensation
may occur on-site or at an off-site location. Mitigation requirements generally fall into three
categories.
Utilizing retaining walls reduced impacts by 0.16 -acre (see Attachment 4), thereby ensuring the unimpacted
wetlands remain viable and functional. The cost of constructing the walls is approximately $150,000, which
far exceeds the cost of mitigating the impact (i.e. approximately $21,000).
D. Based on the fact that Lower Cape Fear Umbrella Mitigation Bank has been in existence and functioning
for some time now, it is anticipated that there will be no temporal lag in replacing the wetland functions
lost, as a result of the project.
Taking all this into consideration, SEGi and the Applicant are of the opinion that the proposed 1:1 mitigation
to impact ratio is sufficient to offset the anticipated loss of wetland function associated with the proposed
Amberleigh Shores Phase II.
3. Please include drawings showing the entire proposed project, including entrance%xit roads, storm water
ponds, and parking areas and label buildings for their specified use. Information and drawings related to the
entire development are necessary to evaluate avoidance and minimization measures. The drawings should
also indicate any vegetated buffers proposed to protect avoided wetlands.
My apologies, for not including the Overall Site Plan. That was an oversight on my behalf. It has been attached
as Sheet C-2.0 of Attachment 2. The plan depicts vegetated buffers and large, mature trees that are to remain
after construction has been completed.
4. a) Describe potential wetland avoidance and minimization measures including alternate site plans and other
steps which would reduce impacts to on-site wetlands and other waters. This includes information regarding
alternate site configurations that were considered so that more impacts are avoided. b) In the application you
mention both 296 units and 287 units as the minimum number for the development, please clam how the
minimum number of units was determined and the total number proposed for this site. c) Please also include
the number ofparking spacesproposed and how the number of spaces was determined. The information should
document that the wetland area to be impacted is the minimum area required for the project to be practicable
and meet the project purpose.
a. The original site plan (1/15/16) proposed the max number of units and 0.895 -acre of wetland impact (see
Attachment 4). From there, the Applicant produced several additional site plans (i.e. Dated 2/11/16 and
2/22/16), where different layouts were explored, less units were proposed and using slopes instead of
retaining walls. Those site plans have been included as Attachment 4. Through the course of exploring
avoidance and minimization potentials, the Applicant reduced wetland impacts by 0.685 -acre.
b. The correct number of proposed units is 287. The minimum number of units is dictated by the cost of the
land, the cost of engineering, surveying and environmental work, such as permitting and mitigation for the
proposed wetland impacts, the cost of physically constructing the proposed development, which would
include materials and labor, as well as the estimated market price for each dwelling.
c. Parking requirement information is provided on the attached site plan (Sheet C-2.0 of Attachment 2).
PARKING - PHASE 2 (PROPOSED)
MINIMUM REQUIRED: 538 SPACES FOR PHASE 2 (SEE CALCULATIONS BELOW)
3
Project: Amberleigh Shores Phase II Pre -Construction Notification
Subject: Response to USACE 18 May 2018 Electronic Request for Additional Information
Date: 23 May 2018
MAXIMUM ALLOWED: 718 SPACES (2.5 PER UNIT)
MINIMUM HANDICAP: 11 (2% OF TOTAL SPACES PROVIDED)
2 HANDICAP VAN (1 PER EVERY 8 HANDICAP SPACES)
HANDICAP PROVIDED: 15 (INCLUDING 8 VAN)
TOTAL PROVIDED: 558 SPACES (508 SURFACE SPACES + 50 GARAGES)
5. a) Information related to proposed storm water ponds is required to evaluate the potential for secondary
hydrologic impacts to adjacent wetlands. This should include the normal pool elevation of the ponds and the
elevation of the adjacent wetlands. Please also provide dimensioned cross section drawings for the storm
water ponds and any control structures. b) Provide information about impervious surface area of the new
development and how directing all flow to the stormwater pond will not have a negative impact on wetland
recharge.
a. Both of the proposed ponds are perched up on the slope of the uplands adjacent to the bottomland
hardwood forest. The water will infiltrate down through the soil, to recharge the wetland feature. In
addition, precipitation and stormwater runoff, from the adjacent wooded areas, will also play a role in
ensuring there will not be a hydrological effect from the proposed development and/or stormwater ponds.
The normal pool elevation (mean sea level - MSL) of the proposed ponds are as follows:
Pond 1: 15.5' MSL
Pond 2: 15.0' MSL
The approximate elevation of the adjacent wetland is 14.0 MSL. Please refer to the plan view drawing (C-
4.2) and the detailed drawing (C-7.2) of the proposed ponds, which are part of Attachment 2, for details
of the proposed features.
b. While stormwater runoff, generated from the proposed 385,140 SF of built upon area (BUA), will be
collected and directed, via pipe, to the stormwater ponds, the remaining depressional wetlands will be
hydrologically maintained, in the same manner as they are today, which is through precipitation, runoff
from the upland natural areas and through groundwater recharge.
6. Please include on the map the proposed buffer area of trees and shrubs between the wetlands area and built
upon area. Also include information regarding the plans for landscaping for the stormwater management
pond.
Please see the Overall Site Plan (C-2.0 of Attachment 2).
4
Project: Amberleigh Shores Phase II Pre -Construction Notification
Subject: Response to USACE 18 May 2018 Electronic Request for Additional Information
Date: 23 May 2018
Attachment 1
Amberleigh Shores Phase I Nationwide Permit
U.S. ARMY CORPS OF ENGINEERS
WILMINGTON DISTRICT
R CbftiL ,D
a --
Action ID. SAW -2007-01135 County: New Hanover USGS Quad: Scotts Hill
GENERAL PERMIT (REGIONAL AND NATIONWIDE) VERIFICATION
Property Owner: Flournoy Development Company
C/o Mr. Ryan Foster
Address: 900 Brookstone Centre Pkwv
Columbus, GA 31904
Telephone No.: (706) 243-9403
Agent/Applicant: Southern Env Group, Inc.
C/o Dana Lutheran
5315 S College Rd, Ste E
Wilmington, NC 28412
(910)452,-2711
Size and location of property (water body, road name/number, town, etc.): The 29.58 acre property is a portion of
Description of projects area and activity: This permit authorizes the permanent discharge of fill material into 0.355
acres of jurisdictional wetlands and temporary impacts to 0.053 acres for the purpose of developing a multi -family
residential development known as Amberleigh Shores. PLEASE SEE SPECIAL CONDITIONS ON THE
FOLLOWING PAGE.
Applicable Law: ® Section 404 (Clean Water Act, 33 USC 1344)
❑ Section 10 (Rivers and Harbors Act, 33 USC 403)
Authorization: Regional General Permit Number: _
Nationwide Permit Number: 29
Your work is authorized by the above referenced permit provided it is accomplished in strict accordance with
the attached conditions and vour submitted plans on 2/16/12. Any violation of the attached conditions or deviation
from your submitted plans may subject the permittee to a stop work order, a restoration order and/or appropriate
legal action.
This verification is valid until the NWP is modified, reissued, or revoked. All of the existing NWPs are scheduled to be modified,
reissued, or revoked prior to March 18, 2017. It is incumbent upon you to remain informed of changes to the NWPs. We will issue a
public notice when the NWPs are reissued. Furthermore, if you commence or are under contract to commence this activity before the
date that the relevant nationwide permit is modified or revoked, you will have twelve (12) months from the date of the modification or
revocation of the NWP to complete the activity under the present terms and conditions of this nationwide permit.
Activities subject to Section 404 (as indicated above) may also require an individual Section 401 Water Quality Certification. You
should contact the NC Division of Water Quality (telephone (919) 733-1786) to determine Section 401 requirements.
For activities occurring within the twenty coastal counties subject to regulation under the Coastal Area Management Act (CAMA),
prior to beginning work you must contact the N.C. Division of Coastal Management .This Department of the Army verification does
not relieve the permittee of the responsibility to obtain any other required Federal, State or local approvals/permits. The
construction/presence of this utility line (to which this Nationwide Permit (NWP) verification letter pertains) will not affect our review
of any future proposed impacts. The presence of this utility line will not be an adequate justification for future impacts (e.g.,
additional utility lines must be built in jurisdictional waters of the U.S. because the location of this utility line necessitates the location
of the other utility lines). We will examine any future proposal to impact jurisdiction waters of the U.S. to ensure that you have
avoided, minimized, and/or mitigated for unavoidable impacts.
If there are any questions regarding this verification, any of the conditions of the Permit, or the Corps of Engineers regulatory
program, please contact Emily�Hgghes at (910) 251-4635.
Corps Regulatory Official
Expiration Date of Verification:
Date: April 4, 2012
SPECIAL CONDITIONS:
1) In order to compensate for impacts to 0.355 acres of non -riparian wetlands, the permittee shall make
payment to the North Carolina Ecosystem Enhancement Program (NC EEP) in the amount determined
by the NC EEP at a 2:1 ratio, sufficient to perform the restoration of 0.71 acres of non -riparian wetlands
in the Cape Fear River Basin, Cataloging Unit 03030007. Construction within jurisdictional areas on
the property shall begin only after the permittee has made full payment to the NC EEP and
provided a copy of the payment documentation to the Corps and the NCEEP has provided written
confirmation to the Corps that it agrees to accept responsibility for the mitigation work required, in
compliance with the NCEEP In -Lieu Fee Instrument, approved by the United States Army Corps of
Engineers, Wilmington District on July, 28, 2010.
2) The permittee shall execute and cause to be recorded in the New Hanover County Register of Deeds the
restrictive covenants acceptable to the Corps of Engineers for the purpose of maintaining the 4.27 acres
of on-site remaining wetland areas, in their natural state in perpetuity, prior to the sale or conveyance
of any lots or other property within the subdivision. The permittee shall enforce the terms of the
restrictive covenants and, prior to conveyance of the property, shall take no action on the property
described in the covenants inconsistent with the terms thereof. The permittee shall provide a copy of
the recorded restrictive covenants and map to the Corps of Engineers within 15 days of recording.
Corps Regulatory Official: Date: Z
0 CS
The Wilmington District is committed to providing the highest level of support to the public. To help us ensure we continue to do so,
please complete the Customer Satisfaction Survey located at our website at http://reeulatorv.usacesurvev.com/ to complete the survey
online.
Generally, subdivisions within this State are subject to restrictive covenants
placed on the property by the developer, that include provisions like
setbacks, types of homes that can be built, etc. If we have detennined
restrictive covenants are acceptable as a means of mitigation, the following
language can be added to those restrictive covenants:
"The areas shown on the recorded plat (identify) as conservation
areas/wetland areas/mitigation areas (choose one) shall be maintained
in perpetuity in their natural or mitigated condition. No person or
entity shall fill, grade, excavate, or perform any other land disturbing
activities; nor cut, remove, or harm any vegetation; nor construct any
structures, nor allow animal grazing or watering or any other
agricultural use on such conservation area. This covenant is intended
to ensure continued compliance with the mitigation condition of
authorizations issued by [the State of North Carolina, Division of
Water Quality, and] the United States of America, U.S. Army Corps
of Engineers, Wilmington District, Action ID X00 - t i 3G and
therefore may be enforced by [the State of North Carolina and/or by]
the United States of America. This covenant is to run with the land,
and shall be binding on the Owner, and all parties claiming under it."
Usually, restrictive covenants have a provision that the property
owners (either all of them or some percentage or them) can amend or modify
the restrictive covenants. If that is the case, that provision needs to say that
the above paragraph (usually identified by paragraph number) cannot be
amended without the express written consent of the U. S. Army Corps of
Engineers, Wilmington District.
Restrictive covenants, like conservation easements, should be drafted
by a lawyer, and not by consultants.
The permit condition needs to state that the permittee will record
restrictive covenants for the purpose of maintaining the mitigation areas in
their natural state in perpetuity, acceptable to the Corps of Engineers, prior
to the sale or conveyance of any lots or other property within the
subdivision. It is important that the restrictions be recorded prior to the sale
of any property within the subdivision (or phase, if it is being developed by
phase). If they are not, then any property sold prior to the recording of the
restrictive covenant are not subject to those covenants.
NATIONWIDE PERMIT 29
DEPARTMENT OF THE ARMY
CORPS OF ENGINEERS
FINAL NOTICE OF ISSUANCE AND MODIFICATION OF NATIONWIDE PERMITS
FEDERAL REGISTER
AUTHORIZED MARCH 19, 2012
Residential Developments. Discharges of dredged or fill material into non -tidal waters of the United
States for the construction or expansion of a single residence, a multiple unit residential
development, or a residential subdivision. This NWP authorizes the construction of building
foundations and building pads and attendant features that are necessary for the use of the residence or
residential development. Attendant features may include but are not limited to roads, parking lots,
garages, yards, utility lines, storm water management facilities, septic fields, and recreation facilities
such as playgrounds, playing fields, and golf courses (provided the golf course is an integral part of
the residential development).
The discharge must not cause the loss of greater than 1/2 -acre of non -tidal waters of the United
States, including the loss of no more than 300 linear feet of stream bed, unless for intermittent and
ephemeral stream beds the district engineer waives the 300 linear foot limit by making a written
determination concluding that the discharge will result in minimal adverse effects. This NWP does
not authorize discharges into non -tidal wetlands adjacent to tidal waters.
Subdivisions: For residential subdivisions, the aggregate total loss of waters of United States
authorized by this NWP cannot exceed 1/2 -acre. This includes any loss of waters of the United States
associated with development of individual subdivision lots.
Notification: The permittee must submit a pre -construction notification to the district engineer prior
to commencing the activity. (See general condition 31.) (Sections 10 and 404)
Please visit our website for detailed general and regional terms and conditions of our 2012 Nationwide
Permits: httn://www.saw.usace.armv.miI/Wetlands/peniiits[NWP/NWP2012/NWP29 3-L3 pdf
T _ _
ggXISTING ITE CHARACTERI m PROPOSE➢ SITP. CHARACTERISTICS
Force ion: F -Fall—Ty-Oeveiopmon,
26.57 Acre T.Al Total Building SF • 137,065: SF (13 Buildmgs B 4 Goragesl SITE
]910 Market Street Pavement SF - 236,350s SF (inalveiye of drive oislee LAT'
L SITE
Harnett Township, Now Hanover County, North Carolina and porking) IsUpmr
sass: TAM4
Pages Creek Watershed /
N 34.2901 Vh "✓
W 77.7994 b e✓•✓1•.
LEGEND Upland Area = 21.91 ACRES dv
Wetland Area - 4,66 ACRES
Total . 26.57 ACRES
Permanent 904 Wetland Impapt -
IMPACT SUMMAFiY � +'
p0,04 yt Welland Permanent Temporary Fill Volume .�
martial I.O. Imooct Imoacf C.Y.
Temporary 404 Welland Impact - t A N2. 5.130 0/0.117 tic _ 1.144 et/0026 no _-600 CY Fill
L _ B -5-.Ng— f/0074 ac 418 s 1)0.010 oc 600 CY Fill
T50bTY Kip R - Riparian
_ p 26 e1/0001 no 75 a(/0442 tic5 CY FIII-
Isolated Wetlands To Be Filled - E _ nl B6 .1/T.002 ac I6B el/0.004 tic . 20 CY Fill NR -Nan-ftiPadan II •
Ip_ F __ip. 406 of/0009 ac 303 1/0007 ac 50 CY FII
•
�_. G 0 100 x110:002 tic _ 0 CY Fill t 1
H _ 38 sl%O D01 ac 0 _ 400 dY Fill I 1
O 1 - 500 CY Fill
1154 pyo 02T tic O
11 1 m
Wetlands to Remain - 10 ISOLATED Al yA��QQ 327 0/0.008 ac .— 0 -- -637-CY Pill- m 1
I�EOT£ IaR. 1,DI7 ai/0:023 ac - 0 —150 CYFill I I
n
Total
a1 0.053 tic 3,675 0Y rill r _ _ _ _ t VICINITY MAP
Proposed Pavement
¢ x:.:k. 1 SCALE: NOT TO SCALE
I
? Sfix 1. NOTE elands shorn oro hosed on jurlsdlctienal determination SAW -2007-01135. 1 _ ( -
2. Existing condition linerork was provided by others and Is not the result of "---
field survey data Ey Thomas B Hutton Engineering Co. 1 t r,l 11
3. The vita layout and final elevations shown on these drawings are conceptual it i 1
and subject to -hong. with final design.
4. A slate storm water permit will be applied for through NCOENR OWO upon _ a
compt.lio; • Jn of final design. . - c/ If �'� !• \� p I 3 ° a
- SHEET W:
HORIZONTAL SCAT E 1 100
0 50 100
Project: Amberleigh Shores Phase II Pre -Construction Notification
Subject: Response to USACE 18 May 2018 Electronic Request for Additional Information
Date: 23 May 2018
Attachment 2
Overall Site Plan, S&EC, Stormwater and Detail Drawings
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LOCATION MAP
NOT TO SCALE
SITE INFORMATION
APPLICANT INFORMATION:
PROJECT ADDRESS:
PARCEL ID:
RECORDED DEED BOOK:
CURRENT ZONING:
PROPOSED ZONING:
PROPOSED USE:
TOTAL SITE AREA:
DENSITY ALLOWABLE IN MFM
DENSITY PROVIDED IN MFM
FLOURNOY DEVELOPMENT COMPANY, LLC
900 BROOKSTONE CENTRE PARKWAY
COLUMBUS, GA 31904
MARKET STREET
WILMINGTON, NC 28411
R03600-005-385-000
R03600-005-023-000
R03600-005-020-002
R03600-005-025-000
R03600-005-024-000
R03600-005-383-000
R03600-005-020-006
R03600-005-028-000
BK XXXX, PG XXX
CITY - MFM (MULTI -FAMILY MEDIUM DENSITY)
CITY - MFM (MULTI -FAMILY MEDIUM DENSITY)
MULTI -FAMILY APARTMENTS
PHASE 1 - 26.57 ACRES
PHASE 2 - 15.34 AC. +.92 AC. ADJ. PARCEL (16.26 TOTAL)
TOTAL - 42.83 ACRES
W
17 DU/AC (728 UNITS) RECONFIGURE EXISTING DRIVEWAY –
13.3 DU/AC (569 UNITS TOTAL) FOR RIGHT IN /RIGHT OUT ACCESS
PHASE 1 EXISTING - 282 UNITS
PHASE 2 PROPOSED - 287 UNITS I T I
FLOOD INFORMATION: THIS PARCEL IS NOT LOCATED IN
100 YEAR FLOOD ZONE AS INDICATED BY FEMA
FLOOD ZONE PANEL 3720316900J BEARING AN
EFFECTIVE DATE OF APRIL 3, 2006.
Nii
CAMA LAND USE CLASSIFICATION: URBAN EXTEND RIGHT TURN LANE
CONSERVATION RESOURCE: ASSUMED POCOSIN (TBD); 25' SETBACK OFF
WETLANDS; WETLAND IMPACTS NOT CALCULATED I. EXISTING POWER
AT THIS TIME REIOCAT�D BY D
MINIMUM REQUIRED: 538 SPACES FOR PHASE 2 (SEE CALCULATIONS BELOW)
MAXIMUM ALLOWED: 718 SPACES (2.5 PER UNIT)
MINIMUM HANDICAP: 11 (2% OF TOTAL SPACES PROVIDED)
2 HANDICAP VAN (1 PER EVERY 8 HANDICAP SPACES)
HANDICAP PROVIDED: 15 (INCLUDING 8 VAN)
TOTAL PROVIDED: 558 SPACES (508 SURFACE SPACES + 50 GARAGES)
BLDG 1 (107 UNITS, 4 STORY):
PROPOSED HEIGHT: 57'-8"
1 BDRM 54 UNITS X 1.5 SPACE = 81 REQ'D SPACES
2 BDRM 53 UNITS X 2.0 SPACE = 106 REQ'D SPACES
BLDG 1 = 187 REQ'D SPACES
BLDG 2 (23 UNITS, 4 STORY):
PROPOSED HEIGHT: 56'-8"
1 BDRM 4 UNITS X 1.5 SPACE = 6 REQ'D SPACES
2 BDRM 11 UNITS X 2.0 SPACE = 22 REQ'D SPACES
3 BDRM 8 UNITS X 2.25 SPACE = 18 REQ'D SPACES
BLDG 2 = 46 REQ'D SPACES
BLDG 3 (39 UNITS, 4 STORY):
PROPOSED HEIGHT: 56'-8"
1 BDRM 11 UNITS X 1.5 SPACE = 17 REQ'D SPACES
2 BDRM 12 UNITS X 2.0 SPACE = 24 REQ'D SPACES
3 BDRM 16 UNITS X 2.25 SPACE = 36 REQ'D SPACES
BLDG 3 = 77 REQ'D SPACES
BLDG 4 (95 UNITS, 4 STORY):
PROPOSED HEIGHT: 56'-8"
1 BDRM 54 UNITS X 1.5 SPACE = 81 REQ'D SPACES
2 BDRM 33 UNITS X 2.0 SPACE = 66 REQ'D SPACES
3 BDRM 8 UNITS X 2.25 SPACE = 18 REQ'D SPACES
BLDG 4 = 165 REQ'D SPACES
BLDG 5 (11 UNITS, 2 STORY):
PROPOSED HEIGHT: 39'-5"
1 BDRM 2 UNITS X 1.5 SPACE = 3 REQ'D SPACES
2 BDRM 9 UNITS X 2.0 SPACE = 18 REQ'D SPACES
BLDG 5 = 21 REQ'D SPACES
BLDG 6 (6 UNITS, 2 STORY):
PROPOSED HEIGHT: 32'-5"
1 BDRM 6 UNITS X 1.5 SPACE = 9 REQ'D SPACES
BLDG 7 (6 UNITS, 2 STORY):
PROPOSED HEIGHT: 32'-5"
1 BDRM 6 UNITS X 1.5 SPACE = 9 REQ'D SPACES
3 GARAGES
PROPOSED HEIGHT: 14'-2"
8 PARKING SPACES PER GARAGE (24 TOT
T
ciTP VPvninTPc
HC RAMP HANDICAP RAMP (TYPICAL - SEE DETAIL)
HC SIGN HANDICAP SIGN (TYPICAL - SEE DETAIL)
AMBERLEIGH
SHORES
D I -I A C � 1
KPROPOSED PHASE 2
PROPERTY
`6" HEADER CURB AT TRANSITION
BETWEEN ASPHALT PAVEMENT AND
PERVIOUS CONCRETE (SEE DETAIL)
`6" VERTICAL CURB ALONG
OUTER EDGE OF PERVIOUS /
CONCRETE (SEE DETAIL) \ '
7
I
MICHEAL & ANN RANEY
R03615-004-019-000
BOOK 4008, PAGE 0581
GRILLING STATION (TYP.)
SEE LANDSCAPE ARCH.
PLANS BY MLDA
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MICHEAL & ANN RANEY
R03615-004-019-000 MICHEAL & ANN RANEY
BOOK 4008, PAGE 0581 R03615-004-020-000
BOOK 4008, PAGE 0581
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STORM SCHEDULE:
Upstream
Downstream
Diamete
Upstream
Downstream
Pipe Length
BC
Upstream
Downstream
Pipe
Node
Node
r (In)
Invert
Invert
(ft)
Slope (%]
Rim Elev
Rim Elev
Material
MH -101
FES -100
30.00
12.27
12.00
68
0.40
21.27
12.00
RCP III
DI -102
MH -101
24.00
12.57
12.27
75
0.40
20.54
21.27
RCP III
DI -103
DI -102
24.00
15.37
14.83
135
0.40
20.36
20.54
RCP III
MH -104
DI -103
18.00
15.75
15.37
94
0.40
21.09
20.36
RCP III
DI -105
MH -104
18.00
22.45
15.75
271
2.47
27.46
21.09
RCP III
DI -110
MH -101
15.00
13.01
12.27
147
0.50
20.61
21.27
RCP III
YD -111
DI -110
12.00
13.56
13.01
55
1.00
21.53
20.61
HDPE
YD -112
YD -111
12.00
15.31
13.56
175
1.00
20.21
21.53
HDPE
MH -201
FES -200
42.00
11.53
10.00
77
2.00
20.69
14.00
RCP III
DI -202
MH -201
42.00
13.67
11.53
107
2.00
20.63
20.69
RCP III
MH -203
DI -202
36.00
14.50
13.67
83
1.00
21.52
20.63
RCP III
MH -204
MH -203
36.00
15.70
14.50
119
1.00
24.90
21.52
RCP III
DI -205
MH -204
36.00
17.52
15.70
182
1.00
26.34
24.90
RCP III
DI -206
DI -205
36.00
18.17
17.52
130
0.50
26.89
26.34
RCP III
DI -207
DI -206
30.00
18.95
18.17
155
0.50
26.87
26.89
RCP III
MH -208
DI -207
30.00
19.79
18.95
169
0.50
27.26
26.87
RCP III
DI -209
MH -208
30.00
20.15
19.79
72
0.50
26.90
27.26
RCP III
MH -210
DI -209
24.00
20.84
20.15
138
0.50
27.75
26.90
RCP III
DI -211
MH -210
24.00
21.38
20.84
109
0.50
27.09
27.75
RCP III
DI -212
DI -211
18.00
22.51
21.38
224
0.50
27.84
27.09
RCP III
YD -230
MH -203
18.00
15.40
14.69
71
1.00
23.83
21.52
RCP III
YD -231
YD -230
15.00
18.46
17.84
62
1.00
25.76
23.83
HDPE
YD -232
YD -231
15.00
19.50
18.46
104
1.00
27.53
25.76
HDPE
YD -233
YD -232
12.00
19.77
19.50
27
1.01
27.56
27.53
HDPE
YD -234
YD -233
12.00
20.98
19.77
121
1.00
26.70
27.56
HDPE
YD -235
YD -234
8.00
21.80
20.98
82
1.00
27.51
26.70
HDPE
YD -236
YD -235
8.00
22.84
21.80
104
1.00
24.97
27.51
HDPE
DI -240
MH -208
24.00
21.40
20.79
122
0.50
26.73
27.26
RCP III
DI -241
DI -240
24.00
22.02
21.40
123
0.50
26.81
26.73
RCP III
MH -242
DI -241
15.00
22.39
22.02
76
0.50
28.79
26.81
RCP III
MH -244
DI -240
15.00
21.63
21.40
45
0.52
28.48
26.73
RCP III
CB -250
DI -211
18.00
21.97
21.38
117
0.50
29.40
27.09
RCP III
CB -251
CB -250
15.00
22.12
21.97
30
0.50
29.37
29.40
RCP III
YD -260
MH -203
12.00
15.36
14.69
56
1.19
23.41
21.52
RCP III
CB -301
FES -300
12.00
24.75
24.60
53
0.28
27.00
-
RCP III
DI -401
EW -400
1 15.00
1 14.80
14.50
97
0.31
15.50
1
RCP III
DI -403
EW -402
12.00
18.31
17.50
81
1.00
21.25
1
RCP III
NOTES:
1.) SEE GENERAL NOTES SHEET (C-1.0) FOR GRADING, DRAINAGE AND EROSION CONTROL NOTES AND DETAILS FOR
MORE INFORMATION.
2.) ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH ALL CITY OF WILMINGTON AND NEW HANOVER COUNTY
STANDARDS AND SPECIFICATIONS.
3.) GEOTECHNICAL TESTING HAS BEEN PERFORMED ON-SITE (REFER TO REPORT). A GEOTECHNICAL ENGINEER
SHALL BE CONSULTED TO CONFIRM SUITABILITY OF SUBGRADE MATERIAL AND PROPER COMPACTION IN FILL
AREAS.
ASPHALT AREA NOTE:
1.) SITE CONTRACTOR SHALL STRIP TOPSOIL AND ANY UNSUITALBE MATERIAL AND PROVIDE CUT/FILL
OPERATIONS TO PROVIDE A COMPACTED CONTROLLED SUBGRADE, IN ACCORDANCE WITH THE
SUBSURFACE GEOTECHNICAL EXPLORATION AND TECHNICAL SPECIFICATIONS.
BUILDING PAD NOTE:
1.) SITE CONTRACTOR SHALL STRIP TOPSOIL AND ANY UNSUITALBE MATERIAL AND PROVIDE CUT/FILL
OPERATIONS TO PROVIDE A COMPACTED CONTROLLED BUILDING PAD, IN ACCORDANCE WITH THE
SUBSURFACE GEOTECHNICAL EXPLORATION AND TECHNICAL SPECIFICATIONS.
NOTATION:
CB
= CATCH BASIN
TC
= TOP OF CURB ELEVATION
DCB
= DOUBLE CATCH BASIN
BC
= BOTTOM OF CURB (GUTTER) ELEVATION
DI
= DROP INLET
PG
= PROPOSED GRADE
DDI
= DOUBLE DROP INLET
HP
= HIGH POINT ELEVATION
YI
= YARD INLET (2 -SIDE OPEN THROAT)
SW
= SIDEWALK ELEVATION
MH
= STORM MANHOLE
FLUME
= CONCRETE DRAINAGE FLUME FLOWLINE ELEVATION
YD
= YARD DRAIN
RP
= RAMP
RD*
= ROOF DRAIN CONNECTION*
PAD
= DUMPSTER PAD ELEVATION
*PROVIDE IN-LINE CLEANOUT AND CONNECTION
TO DOWNSPOUT - SEE ARCHITECTURAL & PLUMBING PLANS FOR
DOWNSPOUT CONNECTIONS. PROVIDE INSERT
-A -TEE
FOR RD -4-02.
DRAINAGE NOTES:
1.) DRAINAGE EASEMENT AND STORMWATER SYSTEM MAINTENANCE IS THE RESPONSIBILITY OF THE DEVELOPER OR
HOA, INCLUDING PONDS, PIPES, AND INFILTRATION BASINS AND TRENCHES.
2.) ALL IMPERVIOUS MUST DRAIN TO THE DESIGNED STORMWATER SYSTEM, PER THE APPROVED PLANS.
3.) NO OBSTRUCTIONS ARE ALLOWED IN DRAINAGE EASEMENTS, INCLUDING FENCES.
4.) ALL STORM DRAINAGE STRUCTURES SHALL MEET NCDOT STANDARDS AND SPECIFICATIONS AND SHALL BE
TRAFFIC RATED FOR H-20 LOADS AT A MINIMUM.
5.) ALL CATCH BASIN (CB) RIM ELEVATIONS AND YARD INLET (YI) THROAT ELEVATIONS ARE LISTED AS THE "GUTTER
OF FLOWLINE ELEVATION" WITHIN THE CURB SECTION. THE CONTRACTOR SHALL MAINTAIN A UNIFORM EDGE OF
PAVEMENT (EOP) WHEN PLACING THE STORM INLETS WITHIN THE CURB -LINE (SEE "CURB TRANSITION" DETAIL).
FOR CATCH BASINS WITHIN A TRANSITION FROM 24" STANDARD CURB & GUTTER, THE RIM ELEVATION GIVEN IS 1
INCH BELOW EOP.
6.) MANHOLE RIM ELEVATION SHOWN ABOVE IS FLUSH WITH PROPOSED GRADE. CONTRACTOR SHALL PROVIDE 6"
CLEARANCE ABOVE PROPOSED GRADE WHEN PLACED IN A GRASS/PERVIOUS AREA; AND A FLUSH CONDITION WITH
PROPOSED PAVEMENT OR IMPERVIOUS COVER.
7.) PROPOSED BUILDINGS SHALL DIVERT ROOF DRAINAGE TO STORMWATER COLLECTION SYSTEM.
8.) CONTRACTOR SHALL ADJUST ALL FRAMES OF EX. UTILITY INFRASTRUCTURE WITHIN ASPHALT OVERLAY AREAS TO
MATCH PROPOSED GRADES.
9.) THE CONTRACTOR SHALL USE EITHER RCP (CL. III) OR HDPE PIPE FOR THE STORM DRAINAGE SYSTEM. IF THE
CONTRACTOR CHOOSES TO USE HDPE PIPE, IT SHALL BE ADS N-12 WT STORM PIPE AND SHALL BE INSTALLED TO
MANUFACTURER SPECIFICATIONS. IN ADDITION, THE CONTRACTOR SHALL BE SURE TO PROVIDE CONCRETE
COLLARS AROUND EACH F.E.S. TO PREVENT FLOATATION IF HDPE PIPE IS CHOSEN.
VARIES 0 7' PARKING STALL TRAVELWAY PARKING STALL 0 7' VARIES
1.80% SLOPE 1/4" PER FT 1/4" PER FT 1.80% SLOPE _SLOPE
PAVEMENT SECTION DETAIL
EXTRUDED CURB
TYPICAL APARTMENT DRIVE WITH PARKING CROSS SECTION
NOT TO SCALE
AMBERLEIGH
SHORES
DWAC� 1
0
INFILTRATION BASIN #3
(SEE DETAILS)
PERVIOUS CONCRETE
PAVEMENT (SEE DETAILS)
PERVIOUS PAVEMENT
OVERFLOW STRUCTURE
(SEE DETAILS)
PROPOSED PHASE 2 I
PROPERTY
MICHEAL & ANN RANEY
R03615-004-019-000
BOOK 4008, PAGE 0581
--- - - - - -- SS ---
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R03615-004-019-000
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5/08/18
C-4,02
PEI JOB#: 16105.PE
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*NOTE:
THE CONTRACTOR SHALL CUT IN AN ORIFICE AT THE PROPOSED SEDIMENT
STORAGE ELEVATION TO ATTACH THE SKIMMER. ONCE THE AREA DRAINING TO
THE BASIN IS STABILIZED, THE CONTRACTOR CAN ESTABLISH THE FINAL WET TOP OF RISER = 20.00
POND, REMOVE THE SKIMMER, AND PLUG OR GROUT THE TEMPORARY ORIFICE.
(2.0 x 2.0 GRATE OPENING)
REINFORCED CONCRETE BOX
(CONTRACTOR SHALL SIZE FOR %
2.0'x 2.0' TOP GRATE OPENING)
2" SCH. 40 PVC PIPE
DRAWDOWN ORIFICE
NORMAL POOL EL. = 15.50
GALVANIZED BAR GRATING 1" x 1/8" BEARING
BARS. FASTEN WITH J -CLIPS, ATTACH TO A 1-1/4"
x 1-1/4" x 1/4" GALVANIZED ANGLE FRAME.
MORTOR FRAME TO TOP OF OUTLET STRUCTURE.
6" 0 SCH, 40 PVC PIPE 53 LF @ 0.94% SLOPE
INV UP = 15.001 INV DN = 14.50
[FLOWS TO LEVEL SPREADER #1]
�-- (6
i
S�Oe�/
^5\�� / If 4.0' X 4.0' (APPROX.) 6" EXTENDED BASE
NOT TO SCALE
GALVANIZED BAR GRATING 1" x 1/8" BEARING
BARS. FASTEN WITH J -CLIPS, ATTACH TO A 1-1/4"
x 1-1/4" x 1/4" GALVANIZED ANGLE FRAME.
TOP OF RISER 20.00 -
MORTOR FRAME TO TOP OF OUTLET STRUCTURE.
= /
(3.0'x 3.0' GRATE OPENING)
TEMPORARY 4"0 ORIFICE FOR
SEDIMENT BASIN SKIMMER. PLUG OR
FILL WHEN CONVERTING SEDIMENT
BASIN TO WET POND.
EL. 17.50
15" 0 CULVERT
NORMAL POOL EL. = 15.50 REINFORCED CONCRETE BOX.
(CONTRACTOR SHALL SIZE FOR
/
3.0'x 3.0' TOP GRATE OPENING)
i
If
5.0'X 5.0' (APPROX.) 6" EXTENDED BASE
POND #1 SECONDARY OUTLET STRUCTURE SECTION (SIDE)
NOT TO SCALE
OUTLET PIPE
15" RCP (CL. III)
INV UP = 17.50
INV DN = 17.00
40 LF @ 1.25%
SEED/ SOD ALL SLOPES ABOVE PERMANENT POOL EL.
6:1 SHELF BELOW PERMANENT POOL PLANTED WITH
SUITABLE WETLAND SPECIES OR VEGETATION.
-
311 6'
p PERMANENT POOL EL 15.50
I 12 -
.31
it
POND #1 SECTION 1
NOT TO SCALE
SUITABLE PLANTS
PICKERELWEED (PONTEDERIA CORDATA)
DUCK POTATO (SAGGITARIA LATIFOLIA AND SAGGITARIA CARDINALIS)
SWAMP ROSE (HIBISCUS MOSHEUTOS)
BLUE FLAG (IRIS VIRGINICA)
CARDINAL FLOWER (LOBELIA CARDINALIS)
WET DETENTION POND PLANTING
CONTRACTOR TO INSTALL ON THE 6:1 SLOPED SHELF, EQUAL NUMBERS OF EACH
OF THE LISTED SUITABLE PLANTS. DURING INSTALLATION, GROUP SIMILAR SPECIES
OF PLANTS TOGETHER. INSTALL PLANTS 24" O.C. IN A CHECKERBOARD PATTERN.
CL
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FOREBAY
NOTE:
1. FOR MAINTENANCE EFFORTS OR IN CASE OF EMERGENCY,
STORMWATER STORED BELOW PERMANENT POOL SHALL BE
PUMPED.
2. ALL STORMWATER (INCLUDING ROOF DRAINAGE) MUST BE
CONVEYED TO THE STORMWATER BMP.
SECONDARY SPILLWAY
WEIR (COVER WITH HARD"
c
LC
----- ^^"1CRETE BOX.
ALL SIZE FOR 3.0'x
ENING)
EL. 19.50
*NOTE:
THE CONTRACTOR SHALL CUT IN AN ORIFICE AT THE PROPOSED SEDIMENT
STORAGE ELEVATION TO ATTACH THE SKIMMER. ONCE THE AREA DRAINING TO
THE BASIN IS STABILIZED, THE CONTRACTOR CAN ESTABLISH THE FINAL WET TOP OF RISER = 19.75
POND, REMOVE THE SKIMMER, AND PLUG OR GROUT THE TEMPORARY ORIFICE. (2.0'x 2.0' GRATE OPENING)
REINFORCED CONCRETE BOX
(CONTRACTOR SHALL SIZE FOR %
2.0'x 2.0' TOP GRATE OPENING)
3" SCH. 40 PVC PIPE
DRAWDOWN ORIFICE
NORMAL POOL EL. = 15.00
GALVANIZED BAR GRATING 1" x 1/8" BEARING
BARS. FASTEN WITH J -CLIPS, ATTACH TO A 1-1/4"
x 1-1/4" x 1/4" GALVANIZED ANGLE FRAME.
MORTOR FRAME TO TOP OF OUTLET STRUCTURE.
6" O SCH, 40 PVC PIPE 63 LF @ 0.79% SLOPE
INV UP = 14.501 INV DN = 14.00
[FLOWS TO LEVEL SPREADER #2]
__--- o
i
i
^5\�� / If 4.0' X 4.0' (APPROX.) 6" EXTENDED BASE
NOT TO SCALE
GALVANIZED BAR GRATING 1" x 1/8" BEARING
BARS. FASTEN WITH J -CLIPS, ATTACH TO A 1-1/4"
x 1-1/4" x 1/4" GALVANIZED ANGLE FRAME.
TOP OF RISER 20.00 -
MORTOR FRAME TO TOP OF OUTLET STRUCTURE.
= /
(3.0'x 3.0' GRATE OPENING)
EL. 19.00 TEMPORARY 4"0 ORIFICE FOR
SEDIMENT BASIN SKIMMER. PLUG OR
FILL WHEN CONVERTING SEDIMENT
BASIN TO WET POND.
EL. 17.50
6"
Ff
4�-
5.0'X 5.0' (APPROX.) - I
POND #1 SECONDARY OUTLET STRUCTURE SECTION (FRONT)
NOT TO SCALE
20'
3 y EL. 21.50
FILTER FABRIC-/ 6" THICK CLASS 'B' RIP -RAP
POND #1 EMERGENCY SPILLWAY DETAIL
TOP EL. FOREBAY BERM 14.50
5' WIDE TOP OF BERM PROVIDED WQV STORAGE EL. = 19.00 _
PERMANENT POOL EL. (NORMAL WATER SURFACE) 15.50
3 w
1 MAIN POND
06
NOT TO SCALE
10'
EL. 14.50
EL. 14.50
POND #1 FOREBAY SPILLWAY DETAIL
NOT TO SCALE SECONDARY OUTLET
PRIMARY OUTLET STRUCTURE STRUCTURE (SEE DETAIL)
(SEE DETAIL) TOP OF DAM EL. = 21.5
SEDIMENT REMOVAL EL. = 12.00 SEDIMENT REMOVAL EL. = 8.00 * 1' OF POND DEPTH IS FOR
BOTTOM EL. FOREBAY = 11.00 POND BOTTOM EL. = 7.00 SEDIMENT ACCUMULATION
FOREBAY IS DIVIDED FROM THE RETAINING WALL (DESIGN BY OTHERS) PER DWQ POLICY
MAIN POND BY AN EARTHEN & RIP RAP BERM TOP = 13.00 1 EXPOSED BOTTOM = 11.00
POND #1 - FOREBAY AND STORAGE POND SECTION
NOT TO SCALE
2" DROP & 18" GRAVEL FILTER STRIP (12" DEPTH) WITH
NCDOT #57 WASHED STONE (TRANSITION ZONE) 1' 1.5' 30'
1.5' VEGETATED FILTER
PROPOSED CONCRETE WALL 5% MAX SLOPE
TOP EL. = 15.50
6" 0 SCH. 40 PVC PIPE INV = 14.50
[FLOWS FROM WET POND #1]
3
r1�
6'
VEG SHELF
6:1 SLOPE TYP.
AROUND POND
RETAINING WALL (DESIGN BY OTHERS)
TOP = 13.001 EXPOSED BOTTOM = 11.00
EX GRADE TIE-IN
EL. 14.05
BLIND SWALE W/ 3:1 SIDE SLOPES co = +/-
N��6
LINE SWALE WITH 8" 12" RIP RAPo a
VEGETATED FILTER STRIP (FOR ENGINEERED FILTER STRIPS,
INV EL. = 14.50 a THE FILTER STRIP AND ANY ADJACENT CUT SLOPES MUST BE
1, COVERED WITH AT LEAST 6 INCHES OF LOOSE TOPSOIL WITH
APPROPRIATE SOIL AMENDMENTS AND AN APPROPRIATE TURF
GRASS SPECIES (SOD). THE ENGINEERED FILTER STRIP MUST
BE CONSTRUCTED WITH A UNIFORM TRANSVERSE SLOPE.
18" NCDOT SAND (18" DEPTH) [GRADATION 2MS PER
TABLE 1005-2 NCDOT SPECS) LINED WITH NON -WOVEN
FILTER FABRIC (MIRAFI 140N OR APPROVED EQUAL)
NON -WOVEN GEOTEXTILE FABRIC
VEGETATED FILTER AND LEVEL
SPREADER #1 SECTION
NOT TO SCALE
/ 18" 0 CULVERT
Y
NORMAL POOL EL. = 15.00 REINFORCED CONCRETE BOX.
(CONTRACTOR SHALL SIZE FOR
/
3.0'x 3.0' TOP GRATE OPENING)
i
If
5.0'X 5.0' (APPROX.) 6" EXTENDED BASE
POND #2 SECONDARY OUTLET STRUCTURE SECTION (SIDE)
NOT TO SCALE
OUTLET PIPE
18" RCP (CL. III)
INV UP = 17.45
INV DN = 17.10
35 LF @ 1.00%
SEED/ SOD ALL SLOPES ABOVE PERMANENT POOL EL.
6:1 SHELF BELOW PERMANENT POOL PLANTED WITH
SUITABLE WETLAND SPECIES OR VEGETATION.
II II 11 6'
p PERMANENT POOL EL 15.00
12"
%1
it
POND #2 SECTION - 1
NOT TO SCALE
SUITABLE PLANTS
PICKERELWEED (PONTEDERIA CORDATA)
DUCK POTATO (SAGGITARIA LATIFOLIA AND SAGGITARIA CARDINALIS)
SWAMP ROSE (HIBISCUS MOSHEUTOS)
BLUE FLAG (IRIS VIRGINICA)
CARDINAL FLOWER (LOBELIA CARDINALIS)
WET DETENTION POND PLANTING
CONTRACTOR TO INSTALL ON THE 6:1 SLOPED SHELF, EQUAL NUMBERS OF EACH
OF THE LISTED SUITABLE PLANTS. DURING INSTALLATION, GROUP SIMILAR SPECIES
OF PLANTS TOGETHER. INSTALL PLANTS 24" O.C. IN A CHECKERBOARD PATTERN.
NOTE:
1. FOR MAINTENANCE EFFORTS OR IN CASE OF EMERGENCY,
STORMWATER STORED BELOW PERMANENT POOL SHALL BE
PUMPED.
2. ALL STORMWATER (INCLUDING ROOF DRAINAGE) MUST BE
CONVEYED TO THE STORMWATER BMP.
SECONDARY SPILLWAY
WEIR (COVER WITH HARD"
c
Lf
^ ICRETE BOX.
IALL SIZE FOR 3.0'x
ENING)
EL. 18.90
EL. 18.40
6"
1-10-
5.0'X
f5.0'X 5.0' (APPROX.) -
POND #2 SECONDARY OUTLET STRUCTURE SECTION (FRONT)
NOT TO SCALE
40'
EL. 21.50
.7
(TyA -
i EL. 20.50 °
0
FILTER FABRIC 6" THICK CLASS 'B' RIP -RAP
POND #2 EMERGENCY SPILLWAY DETAIL
NOT TO SCALE
10'
EL. 14.00 EL. 14.00
' ' " III' 111 -Ti--' H
FILTER FABRIC
CLASS 'B' RIP -RAP O
POND #2 FOREBAY SPILLWAY DETAIL U
NOT TO SCALE
SECONDARY OUTLET STRUCTURE
(SEE DETAIL) TOP OFDAM w
PRIMARY OUTLET STRUCTURE EL. = 21.50
NOT TO SCALE
2" DROP & 18" GRAVEL FILTER STRIP (12" DEPTH) WITH
NCDOT #57 WASHED STONE (TRANSITION ZONE) 1' 1.5' 30'
1.5' VEGETATED FILTER
PROPOSED CONCRETE WALL 5% MAX SLOPE
TOP EL. = 15.00
6" 0 SCH. 40 PVC PIPE INV = 14.00
[FLOWS FROM WET POND #2]
EX GRADE TIE-IN
EL. = 14.45
BLIND SWALE W/ 3:1 C°
SIDE SLOPES
o �
LINE SWALE WITH 8"-12" N a VEGETATED FILTER STRIP (FOR ENGINEERED FILTER STRIPS,
RIP RAP STONE THE FILTER STRIP AND ANY ADJACENT CUT SLOPES MUST BE
INV EL. = 14.00 COVERED WITH AT LEAST 6 INCHES OF LOOSE TOPSOIL WITH
1 APPROPRIATE SOIL AMENDMENTS AND AN APPROPRIATE TURF
GRASS SPECIES (SOD). THE ENGINEERED FILTER STRIP MUST
BE CONSTRUCTED WITH A UNIFORM TRANSVERSE SLOPE.
18" NCDOT SAND (18" DEPTH) [GRADATION 2MS PER
TABLE 1005-2 NCDOT SPECS) LINED WITH NON -WOVEN
FILTER FABRIC (MIRAFI 140N OR APPROVED EQUAL)
NON -WOVEN GEOTEXTILE FABRIC
VEGETATED FILTER AND LEVEL
SPREADER #2 SECTION
NOT TO SCALE
TION
TOP EL. FOREBAY BERM 14.00
(SEE DETAIL)
Fir --I
5' WIDE TOP OF BERM
PROVIDED WQV STORAGE EL. = 18.40
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PERMANENT POOL EL. (NORMAL WATER SURFACE) 15.00
Approved Construction Plan
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Name Date
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3
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SEDIMENT REMOVAL EL. = 10.00
BOTTOM EL. FOREBAY = 9.00
NORTH CAROLINA
SEDIMENT REMOVAL EL. = 8.00 * 1' OF POND DEPTH IS FOR
POND BOTTOM EL. = 7.00
VEG SHELF
6:1 SLOPE TYP.
O
For each open utility cut
City streets, a $325 permit
t
APPROVED STORMWATER MANAGEMENT PLAN
SEDIMENT ACCUMULATION
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AROUND POND
00
shall be required from the
FOREBAY IS DIVIDED FROM THE
PER DWQ POLICY
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and/or project acceptance.
MAIN POND
BY AN EARTHEN & RIP RAP BERM r% r% K i r_%
un rrN M r r% A X
A K 1 M r+TrN M n r% r r►I-% K I r-% "
Z p
NOT TO SCALE
2" DROP & 18" GRAVEL FILTER STRIP (12" DEPTH) WITH
NCDOT #57 WASHED STONE (TRANSITION ZONE) 1' 1.5' 30'
1.5' VEGETATED FILTER
PROPOSED CONCRETE WALL 5% MAX SLOPE
TOP EL. = 15.00
6" 0 SCH. 40 PVC PIPE INV = 14.00
[FLOWS FROM WET POND #2]
EX GRADE TIE-IN
EL. = 14.45
BLIND SWALE W/ 3:1 C°
SIDE SLOPES
o �
LINE SWALE WITH 8"-12" N a VEGETATED FILTER STRIP (FOR ENGINEERED FILTER STRIPS,
RIP RAP STONE THE FILTER STRIP AND ANY ADJACENT CUT SLOPES MUST BE
INV EL. = 14.00 COVERED WITH AT LEAST 6 INCHES OF LOOSE TOPSOIL WITH
1 APPROPRIATE SOIL AMENDMENTS AND AN APPROPRIATE TURF
GRASS SPECIES (SOD). THE ENGINEERED FILTER STRIP MUST
BE CONSTRUCTED WITH A UNIFORM TRANSVERSE SLOPE.
18" NCDOT SAND (18" DEPTH) [GRADATION 2MS PER
TABLE 1005-2 NCDOT SPECS) LINED WITH NON -WOVEN
FILTER FABRIC (MIRAFI 140N OR APPROVED EQUAL)
NON -WOVEN GEOTEXTILE FABRIC
VEGETATED FILTER AND LEVEL
SPREADER #2 SECTION
NOT TO SCALE
TION
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Name Date
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Public Services • Engineering Division
For each open utility cut
City streets, a $325 permit
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APPROVED STORMWATER MANAGEMENT PLAN
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N �
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shall be required from the
Date: Permit #
City prior to occupancy
a�
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and/or project acceptance.
Signed:
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028852 -
001111100
5/08/18
C-7.2
PEI JOB#: 16105.PE
6
\ 4"
4"
12'
"8 -
30" TO FACE OF CURB OR 42" TO FACE OF
BUILDING.
r
'7F PAV'T.
NOTE: REBAR SPACING
AND HOLE SIZES SHALL BE COORDINATED
WITH WHEEL STOP MANUFACTURER.
CONCRETE WHEEL STOP DETAIL
1:12 MAX SLOPE (TYP)
NOT TO SCALE
" TO 1" DIA. HOLE
#3 REBAR FILL HOLE WITH SLURRY MIX
NON -SHRINK GROUT AFTER REBAR
>TALLATION.
RAISED SIDEWALK OR TAPERED UP TO
EXISTING HARDSCAPE/SIDEWALK
OPTIONAL WHEEL STOPS.
ISOMETRIC
5' MIN.
LU
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J
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Lfi
M-111111112111-000 MIAR
PAINT MARKINGS
PER ADA GUIDELINES.
PAINT MARKINGS
PER ADA GUIDELINES.
1:12 MAX SLOPE (TYP)
WALK
TAPER DOWN SIDEWALK ' \ FLUSH WITH PARKING LOT SURFACE
DETECTABLE WARNING PADS
PER ADA GUIDELINES.
HANDICAP CURB ACCESS RAMP AND MARKINGS DETAIL
TOP OF DAM
EL. = 28.0
NOT TO SCALE
1/2" JOINT
SEALER
EXPANSION JOINT
5' 3000 PSI
CONCRETE
1/4" PER FT.
a
d ° °
d ° °
SECTION VIEW
1/8"
Q ° d 111 d
a 4"
d °
- 1/8" RADIUS, TYP.
DUMMY GROOVE
CONTRACTION JOINT
1/2" EXPANSION JOINT- MAX. 50' O.C.
& BETWEEN STRUCTURES
GROOVED CONTRACTION
JOINT
2" SF9.5A SURFACE COURSE, MIN. ASPHALT
ENSITY REQUIREMENTS IN ACCORDANCE WITH
EOTECHNICAL REPORT
NCDOT CRUSHED STONE AGGREGATE BASE
:OURSE 100% MODIFIED PROCTOR MAXIMUM DRY
SNIT WEIGHT PER AASHTO T-180
COMPACTED SUBGRADE*
100% ASTM D698 TO 12" DEPTH
LIGHT DUTY PAVEMENT SECTION
0.75" ADDITIONAL
STONE FOR STD. CURB
5'
SIDEWALK
\ 12.1 MAX.
PAVEMENT CURB
SECTION A -A
A
WHEEL CHAIR RAMP (DROP CURB)
NOT TO SCALE
1
3•,
50:1 MAX.
NOT TO SCALE
24" CURB AND GUTTER (STD. & SPILL)
NOT TO SCALE
VERTICAL CURB
NOT TO SCALE
GGREGATE BASE COURSE
d SECOND LAYER ASPHALT
3,000 PSI CONCRETE
SIDEWALK
d ° QD
° a ° d
°
III III d
COMPACTED d °6"
SUBGRADE °
8"
FIRST ASPHALT LAYER
STONE BASE
RAISED SIDEWALK WITH
THICKENED EDGE DETAIL
NOT TO SCALE
NOTES:
1. LONGITUDINAL SLOPE FO SIDEWALK SHALL BE NO GREATER THAN 1:20 (5%)
2. ALL CONSTRUCTION SHALL CONFORM TO APPLICABLE FEDERAL, STATE AND LOCAL CODES AND
THE TECHNICAL SPECIFICATIONS.
3. CURB RAMPS SHALL BE INSTALLED AT EACH INTERSECTION OR DESIGNATED CROSSWALK.
4. ON ACCESSIBLE ROUTES WHERE SIDEWALK IS LESS THAN 5' WIDE, PASSING SPACES AT LEAST
5'x5' SHALL BE LOCATED AT REASONABLE INTERVALS NOT TO EXCEED 200'.
EL. 28.00
v.. v. L. v1vL. r •. L..I X LwL. I . IL..
FILTER FABRIC
NOT TO SCALE 6" THICK CLASS'B' RIP -RAP
BASIN #3 EMERGENCY SPILLWAY DETAIL
SEED INFILTRATION BASIN IN NOT TO SCALE
ACCORDANCE WITH SEEDING TOP OF DAM
SPECIFICATIONS ON SHEET C-1.0. EL. - 28.0
100 YR. EL. = 26.70
10 YR. EL. = 26.54
1 YR. EL. = 26.10
1 3
1�POND BOTTOM EL. = 25.50
ALINE BOTTOM OF INFILTRATION
BASIN WITH A MINIMUM OF 4"
CLEAN SAND (1-2% FINES OR LESS)
INFILTRATION BASIN #3 SECTION
NOT TO SCALE
TOP OF RISER = 26.50
(3.0'x 3.0' GRATE OPENING)
GALVANIZED BAR GRATING 1" x 1/8" BEARING
BARS. FASTEN WITH J -CLIPS, ATTACH TO A 1-1/4"
x 1-1/4" x 1/4" GALVANIZED ANGLE FRAME.
MORTOR FRAME TO TOP OF OUTLET STRUCTURE.
REINFORCED CONCRETE BOX. 18" 0 CULVERT
(CONTRACTOR SHALL SIZE FOR
3.0'x 3.0' TOP GRATE OPENING)
If 5.0'X 5.0' (APPROX.) 6" EXTENDED BASE
INFILTRATION BASIN #3 OUTLET STRUCTURE
NOT TO SCALE
on
SECOND LAYER ASPHALT
-� ° (WHERE APPLICABLE)
3 000 PSI
° CO
CONCRETE
_ CURBING
COMPACTED
SUBGRADE
8"
ASPHALT PAVING
STONE BASE
TYPICAL EXTRUDED CONCRETE CURB
NOT TO SCALE
6"X12" CONCRETE
HEADER TRANSITION
IMPERVIOUS
PAVEMENT SECTION
PERVIOUS
PAVEMENT SECTION a° 12"
MIN'. ° .
ASPHALT TO PERVIOUS CONCRETE TRANSITION
6" 4000 PSI PERVIOUS CONCRETE
6" NCDOT CRUSHED STONE
AGGREGATE BASE COURSE
100% MODIFIED PROCTOR
MAXIMUM DRY UNIT WEIGHT
PER AASHTO T-180
PACTED SUBGRADE*
o ASTM D698 TO 12" DEPTH
NOTES:
1. PERVIOUS CONCRETE SHALL CONFORM TO ALL
REQUIREMENTS OF ACI 522.1, 'SPECIFICATION FOR PERVIOUS
CONCRETE PAVEMENT,' PUBLISHED BY THE AMERICAN
CONCRETE INSTITUTE, FARMINGTON HILLS, MICHIGAN,
EXCEPT AS MODIFIED BY THESE CONTRACT DOCUMENTS.
PERVIOUS CONCRETE PAVEMENT SECTION FOR ZONING
NOT TO SCALE
"""^ PSI PERVIOUS CONCRETE
12" WASHED #57 STONE
(WRAPPED IN NON -WOVEN
GEOTEXTILE FABRIC MIRAFI
N140 OR APPROVED EQUAL)
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NOTES:
1. PERVIOUS CONCRETE SHALL CONFORM TO ALL
REQUIREMENTS OF ACI 522.1, 'SPECIFICATION FOR PERVIOUS
CONCRETE PAVEMENT,' PUBLISHED BY THE AMERICAN
CONCRETE INSTITUTE, FARMINGTON HILLS, MICHIGAN,
EXCEPT AS MODIFIED BY THESE CONTRACT DOCUMENTS.
2. IN -FIELD INFILTRATION TESTING SHALL CONFIRM RFTS SOIL
TESTS OF EXISTING CONDITIONS.
PERVIOUS CONCRETE PAVEMENT SECTION FOR SWM CREDIT
NOT TO SCALE
NCDOT STD. CATCH BASIN
REINFORCED CONCRETE BOX
OUTLET PIPE PERVIOUS CONCRETE PAVEMENT
18" RCP (CL. III) EL. = 27.25
INV UP = 23.08
INV DN = 22.50
58 LF @ 1.00%
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1. SYMBOL TO BE PAINTED
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1. METAL POST AND ALL HARDWARE SHALL BE GALVANIZED STEEL, ASTM A307-90.
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2. POST HOLES SHALL BE FILLED WITH GRANULAR BACKFILL IN 3 -INCH TO 4 -INCH LIFTS.
THOROUGHLY HAND TAMP EACH LIFT AND CROWN BACKFILL AT TOP TO SHED WATER.
Approved Construction Plan
3. CONCRETE FOR FOOTING SHALL BE PORTLAND CEMENT AND HAVE A MINIMUM
COMPRESSIVE STRENGTH OF 3000 PSI.
4. SIGNS SHALL BE CONSTRUCTED OF ALUMINUM, TYPE 6061-T6 AND IN CONFORMANCE
WITH ASTM STD B-209. THICKNESS SHALL BE 0.80 INCHES.
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shall be required from the
SHALL BE 3.75" HEIGHT AND LOWERCASE LETTERS SHALL BE 2.5" HEIGHT WITH 3.75"
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8. CORNER RADIUS OF SIGNS SHALL BE 2.5"
Fire
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Project: Amberleigh Shores Phase II Pre -Construction Notification
Subject: Response to USACE 18 May 2018 Electronic Request for Additional Information
Date: 23 May 2018
Attachment 3
NC Wetland Assessment Method Forms
Project: Amberleigh Shores Phase II Pre -Construction Notification
Subject: Response to USACE 18 May 2018 Electronic Request for Additional Information
Date: 23 May 2018
NC WAM Wetland Map
L]
NC WAM WETLAND ASSESSMENT FORM
Accompanies User Manual Version 4.1
mating %,aicuiaior version 4._1
Wetland Site Name Amberleigh Shores Phase 2 Basins 1 & 2 Date November 17, 2017
Wetland Type Basin Wetland Assessor Name/Organization David Scibetta (SEGi)
Level III Ecoregion Southeastern Plains Nearest Named Water Body Pages Creek
River Basin Cape Fear _11USGS 8 -Digit Catalogue Unit 03030003
C' Yes � * No Precipitation within 48 hrs? Latitude/Longitude (deci-degrees) 1) 34.285247 / -77.803356
Evidence of stressors affecting the assessment area (may not be within the assessment area) 2) 34.285828 / -77.802586
Please circle and/or make note on last page if evidence of stressors is apparent. Consider departure from reference, if
appropriate, in recent past (for instance, approximately within 10 years). Noteworthy stressors include, but are not limited
to the following.
• Hydrological modifications (examples: ditches, dams, beaver dams, dikes, berms, ponds, etc.)
• Surface and sub -surface discharges into the wetland (examples: discharges containing obvious pollutants, presence of nearby
septic tanks, underground storage tanks (USTs), hog lagoons, etc.)
• Signs of vegetation stress (examples: vegetation mortality, insect damage, disease, storm damage, salt intrusion, etc.)
• Habitat/plant community alteration (examples: mowing, clear -cutting, exotics, etc.)
Is the assessment area intensively managed? r Yes C: No
Regulatory Considerations (select all that apply to the assessment area)
F_ Anadromous fish
F_ Federally protected species or State endangered or threatened species
F_ NCDWQ riparian buffer rule in effect
F_ Abuts a Primary Nursery Area (PNA)
F_ Publicly owned property
F_ N.C. Division of Coastal Management Area of Environmental Concern (AEC) (including buffer)
F_ Abuts a stream with a NCDWQ classification of SA or supplemental classifications of HQW, ORW, or Trout
F_ Designated NCNHP reference community
F_ Abuts a 303(d) -listed stream or a tributary to a 303(d) -listed stream
What type of natural stream is associated with the wetland, if any? (check all that apply)
f Blackwater
f Brownwater
F_ Tidal (if tidal, check one of the following boxes) C Lunar f Wind Both
Is the assessment area on a coastal island? r Yes f: No
Is the assessment area's surface water storage capacity or duration substantially altered by beaver?
Does the assessment area experience overbank flooding during normal rainfall conditions?
t ' Yes t: No
t ' Yes f+ No
Ground Surface Condition/Vegetation Condition — assessment area condition metric
Check a box in each column. Consider alteration to the ground surface (GS) in the assessment area and vegetation structure
(VS) in the assessment area. Compare to reference wetland if applicable (see User Manual). If a reference is not applicable,
then rate the assessment area based on evidence of an effect.
GS VS
to A C: A Not severely altered
C B C B Severely altered over a majority of the assessment area (ground surface alteration examples: vehicle tracks, excessive
sedimentation, fire -plow lanes, skidder tracks, bedding, fill, soil compaction, obvious pollutants) (vegetation structure
alteration examples: mechanical disturbance, herbicides, salt intrusion [where appropriate], exotic species, grazing,
less diversity [if appropriate], hydrologic alteration)
2. Surface and Sub -Surface Storage Capacity and Duration — assessment area condition metric
Check a box in each column. Consider surface storage capacity and duration (Surf) and sub -surface storage capacity and
duration (Sub). Consider both increase and decrease in hydrology. Refer to the current NRCS lateral effect of ditching guidance for
North Carolina hydric soils (see USACE Wilmington District website) for the zone of influence of ditches in hydric soils. A ditch
<_ 1 foot deep is considered to affect surface water only, while a ditch > 1 foot deep is expected to affect both surface and ditch
sub -surface water. Consider tidal flooding regime, if applicable.
Surf Sub
C' A C A Water storage capacity and duration are not altered.
C B C: B Water storage capacity or duration are altered, but not substantially (typically, not sufficient to change vegetation).
C' C C C Water storage capacity or duration are substantially altered (typically, alteration sufficient to result in vegetation
change) (examples: draining, flooding, soil compaction, filling, excessive sedimentation, underground utility lines).
3. Water Storage/Surface Relief -assessment area/wetland type condition metric (answer for non -marsh wetlands only)
Check a box in each column for each group below. Select the appropriate storage for the assessment area (AA) and the wetland
type (WT).
AA WT
3a. (` A C A Majority of wetland with depressions able to pond water > 1 foot deep
(` B (i B Majority of wetland with depressions able to pond water 6 inches to 1 foot deep
(i C C C Majority of wetland with depressions able to pond water 3 to 6 inches deep
(` D (` D Depressions able to pond water < 3 inches deep
3b. ( A Evidence that maximum depth of inundation is greater than 2 feet
( B Evidence that maximum depth of inundation is between 1 and 2 feet
{a C Evidence that maximum depth of inundation is less than 1 foot
4. Soil Texture/Structure - assessment area condition metric
Check a box from each of the three soil property groups below. Dig soil profile in the dominant assessment area landscape
feature. Make soil observations within the 12 inches. Use most recent National Technical Committee for Hydric Soils guidance for
regional indicators.
4a. (' A Sandy soil
(' B Loamy or clayey soils exhibiting redoximorphic features (concentrations, depletions, or rhizospheres)
r C Loamy or clayey soils not exhibiting redoximorphic features
r D Loamy or clayey gleyed soil
R E Histosol or histic epipedon
4b. C A Soil ribbon < 1 inch
R B Soil ribbon >- 1 inch
4c. (' A No peat or muck presence
t* B A peat or muck presence
5. Discharge into Wetland - opportunity metric
Check a box in each column. Consider surface pollutants or discharges (Surf) and sub -surface pollutants or discharges (Sub).
Examples of sub -surface discharges include presence of nearby septic tank, underground storage tank (UST), etc.
Surf Sub
t: A t: A Little or no evidence of pollutants or discharges entering the assessment area
t B t^ B Noticeable evidence of pollutants or discharges entering the wetland and stressing, but not overwhelming the
treatment capacity of the assessment area
t C t^ C Noticeable evidence of pollutants or discharges (pathogen, particulate, or soluble) entering the assessment area and
potentially overwhelming the treatment capacity of the wetland (water discoloration, dead vegetation, excessive
sedimentation, odor)
6. Land Use - opportunity metric
Check all that apply (at least one box in each column). Evaluation involves a GIS effort with field adjustment. Consider sources
draining to assessment area within entire upstream watershed (WS), within 5 miles and within the watershed draining to the
assessment area (5M), and within 2 miles and within the watershed draining to the assessment area (2M). Effective riparian buffers
are considered to be 50 feet wide in the Coastal Plain and Piedmont ecoregions and 30 feet wide in the Blue Ridge Mountains ecoregion.
WS 5M 2M
F_ A F_ A F_ A >- 10% impervious surfaces
F_ B F_ B F_ B < 10% impervious surfaces
F_ C F_ C F_ C Confined animal operations (or other local, concentrated source of pollutants)
F_ D F_ D F_ D >_ 20% coverage of pasture
F_ E F_ E F_ E >_ 20% coverage of agricultural land (regularly plowed land)
F_ F F_ F F_ F >_ 20% coverage of maintained grass/herb
F_ G F_ G F_ G >_ 20% coverage of clear-cut land
F1 H R H F1 H Little or no opportunity to improve water quality. Lack of opportunity may result from hydrologic alterations
that prevent drainage or overbank flow from affecting the assessment area.
Wetland Acting as Vegetated Buffer - assessment area/wetland complex condition metric
7a. Is assessment area within 50 feet of a tributary or other open water?
{ ` Yes t: No If Yes, continue to 7b. If No, skip to Metric 8.
Wetland buffer need only be present on one side of the water body. Make buffer judgment based on the average width of the wetland.
Record a note if a portion of the buffer has been removed or disturbed.
7b. How much of the first 50 feet from the bank is weltand? Descriptor E should be selected if ditches effectively bypass the buffer.
( A >- 50 feet
( B From 30 to < 50 feet
( C From 15 to < 30 feet
( D From 5 to < 15 feet
{ E < 5 feet or buffer bypassed by ditches
7c. Tributary width. If the tributary is anastomosed, combine widths of channels/braids for a total width.
C < 15 -feet wide { ` > 15 -feet wide { ' Other open water (no tributary present)
7d. Do roots of assessment area vegetation extend into the bank of the tributary/open water?
C Yes t" No
7e. Is tributary or other open water sheltered or exposed?
(` Sheltered - adjacent open water with width < 2500 feet and no regular boat traffic.
{ ' Exposed - adjacent open water with width >- 2500 feet or regular boat traffic.
8. Wetland Width at the Assessment Area — wetland type/wetland complex metric (evaluate for riparian wetlands only)
Check a box in each column. Select the average width for the wetland type at the assessment area (WT)
and the wetland complex at the assessment areas (WC). See User Manual for WT and WC boundaries.
WT WC
f A C A >_ 100 feet
{ B C B From 80 to < 100 feet
{ C C C From 50 to < 80 feet
{ D ( D From 40 to < 50 feet
{ E ( E From 30 to < 40 feet
{ F ( F From 15 to < 30 feet
{ G C G From 5 to < 15 feet
f— H r H < 5 feet
9. Inundation Duration — assessment area condition metric
Answer for assessment area dominant landform.
(: A Evidence of short -duration inundation (< 7 consecutive days)
( B Evidence of saturation, without evidence of inundation
C C Evidence of long -duration inundation or very long -duration inundation (7 to 30 consecutive days or more)
10. Indicators of Deposition — assessment area condition metric
Consider recent deposition only (no plant growth since deposition).
f: A Sediment deposition is not excessive, but at approximately natural levels.
f B Sediment deposition is excessive, but not overwhelming the wetland.
f— C Sediment deposition is excessive and is overwhelming the wetland.
11. Wetland Size — wetland type/wetland complex condition metric
Check a box in each column. Involves a GIS effort with field adjustment. This metric evaluates three aspects of the wetland area: the
size of the wetland type (WT), the size of the wetland complex (WC), and the size of the forested wetland (FW) (if applicable, see User
Manual). See the User Manual for boundaries of these evaluation areas. If assessment area is clear-cut, select "K" for the FW column.
WT WC FW (if applicable)
t o t o t— A >_ 500 acres
t B t B t" B From 100 to < 500 acres
r C t C r C From 50 to < 100 acres
r D t D r D From 25 to < 50 acres
f E t E t" E From 10 to < 25 acres
f-" F t F r F From 5 to < 10 acres
f-" G C G r G From 1 to < 5 acres
t: H f: H t: H From 0.5 to < 1 acre
f-" I t I i I From 0.1 to < 0.5 acre
f-" J t J i J From 0.01 to < 0.1 acre
f K t^ K i K < 0.01 acre or assessment area is clear-cut
12. Wetland Intactness — wetland type condition metric (evaluate for Pocosins only)
t" A Pocosin is the full extent (>_ 90%) of its natural landscape size.
t" B Pocosin is < 90% of the full extent of its natural landscape size.
13. Connectivity to Other Natural Areas — landscape condition metric
13a. Check appropriate box(es) (a box may be checked in each column). Involves a GIS effort with field adjustment. This
evaluates whether the wetland is well connected (Well) and/or loosely connected (Loosely) to the landscape patch, the contiguous
metric naturally vegetated area and open water (if appropriate). Boundaries are formed by four -lane roads, regularly maintained utility
line corridors the width of a four -lane road or wider, urban landscapes, fields (pasture open and agriculture), or water > 300 feet wide.
Well Loosely
f- A f A >_ 500 acres
C` B C- B From 100 to < 500 acres
C` C C- C From 50 to < 100 acres
C` D {: D From 10 to < 50 acres
f* E C- E < 10 acres
C` F C- F Wetland type has a poor or no connection to other natural habitats
13b. Evaluate for marshes only.
C Yes r No Wetland type has a surface hydrology connection to open waters/stream or tidal wetlands.
14. Edge Effect — wetland type condition metric (skip for all marshes)
May involve a GIS effort with field adjustment. Estimate distance from wetland type boundary to artificial edges. Artificial edges include
non -forested areas >_ 40 feet wide such as fields, development, roads, regularly maintained utility line corridors and clear -cuts.
Consider the eight main points of the compass.
C A No artificial edge within 150 feet in all directions
[+ B No artificial edge within 150 feet in four (4) to seven (7) directions
f C An artificial edge occurs within 150 feet in more than four (4) directions or assessment area is clear-cut
15. Vegetative Composition — assessment area condition metric (skip for all marshes and Pine Flat)
r: A Vegetation is close to reference condition in species present and their proportions. Lower strata composed of appropriate
species, with exotic plants absent or sparse within the assessment area.
t� B Vegetation is different from reference condition in species diversity or proportions, but still largely composed of native species
characteristic of the wetland type. This may include communities of weedy native species that develop after clearcutting or
clearing. It also includes communities with exotics present, but not dominant, over a large portion of the expected strata.
t� C Vegetation severely altered from reference in composition. Expected species are unnaturally absent (planted stands of non -
characteristic species or at least one stratum inappropriately composed of a single species). Exotic species are dominant in
at least one stratum.
16. Vegetative Diversity — assessment area condition metric (evaluate for Non -tidal Freshwater Marsh only)
is A Vegetation diversity is high and is composed primarily of native species (<10% cover of exotics).
C� B Vegetation diversity is low or has > 10% to 50% cover of exotics.
C C Vegetation is dominated by exotic species (>50% cover of exotics).
17. Vegetative Structure — assessment area/wetland type condition metric
17a. Is vegetation present?
r: Yes C' No If Yes, continue to 17b. If No, skip to Metric 18.
17b. Evaluate percent coverage of assessment area vegetation for all marshes only. Skip to 17c for non -marsh wetlands.
C' A >_ 25% coverage of vegetation
r-" B < 25% coverage of vegetation
17c. Check a box in each column for each stratum. Evaluate this portion of the metric for non -marsh wetlands. Consider structure
in airspace
above the
assessment area (AA) and the wetland type (WT) separately.
AA
WT
oC+
A
(# A
Canopy closed, or nearly closed, with natural gaps associated with natural processes
f B
C B
Canopy present, but opened more than natural gaps
v
f C
C C
Canopy sparse or absent
OL'
C` A
f A
Dense mid-story/sapling layer
C` B
C: B
Moderate density mid-story/sapling layer
G C
C` C
Mid-story/sapling layer sparse or absent
-0 f A C` A Dense shrub layer
%"' B f. B Moderate density shrub layer
C C C Shrub layer sparse or absent
{- A f A Dense herb layer
�5 (. B f B Moderate density herb layer
_ (-- C (: C Herb layer sparse or absent
18. Snags — wetland type condition metric
r— A Large snags (more than one) are visible (> 12 -inches DBH, or large relative to species present and landscape stability).
r: B Not A
19. Diameter Class Distribution — wetland type condition metric
i� A Majority of canopy trees have stems > 6 inches in diameter at breast height (DBH); many large trees (> 12 inches DBH) are
present.
r: B Majority of canopy trees have stems between 6 and 12 inches DBH, few are > 12 -inch DBH.
r— C Majority of canopy trees are < 6 inches DBH or no trees.
20. Large Woody Debris — wetland type condition metric
Include both natural debris and man -placed natural debris.
r: A Large logs (more than one) are visible (> 12 inches in diameter, or large relative to species present and landscape stability).
r— B Not A
21. Vegetation/Open Water Dispersion — wetland type/open water condition metric (evaluate for Non -Tidal Freshwater
Marsh only)
Select the figure that best describes the amount of interspersion between vegetation and open water in the growing season. Patterned
areas indicate vegetated areas, while solid white areas indicate open water.
r -A t B GC t D
22. Hydrologic Connectivity — assessment area condition metric (evaluate for riparian wetlands only)
Examples of activities that may severely alter hydrologic connectivity include intensive
ditching, fill, sedimentation, channelization, diversion, man-made berms, beaver dams, and stream incision.
r� A Overbank and overland flow are not severely altered in the assessment area.
i� B Overbank flow is severely altered in the assessment area.
i� C Overland flow is severely altered in the assessment area.
r� D Both overbank and overland flow are severely altered in the assessment area.
Notes
NC WAM Wetland Rating Sheet
Accompanies User Manual Version 4.1
Rating Calculator Version 4.1
Wetland Site Name Amberleigh Shores Phase 2 Basins 1 & 2 Date
Wetland Type Basin Wetland Assessor Name/Organization
Notes on Field Assessment Form (Y/N) NO
Presence of regulatory considerations (Y/N) NO
Wetland is intensively managed (Y/N) NO
Assessment area is located within 50 feet of a natural tributary or other open water (Y/N) NO
Assessment area is substantially altered by beaver (Y/N) NO
Assessment area experiences overbank flooding during normal rainfall conditions (Y/N) NO
Assessment area is on a coastal island (Y/N) NO
Sub -function Rati
Function Sub -function Metrics Rating
Hydrology Surface Storage and Retention Condition NA
Sub -Surface Storage and Retention Condition NA
Water Quality Pathogen Change Condition NA
Condition/Opportunity NA
Opportunity Presence? (Y/N) NA
Particulate Change Condition NA
Condition/Opportunity
NA
Opportunity Presence? (Y/N)
NA
Soluble Change Condition
NA
Condition/Opportunity
NA
Opportunity Presence? (Y/N)
NA
Physical Change Condition
NA
Condition/Opportunity
NA
Opportunity Presence? (Y/N)
NA
Pollution Change Condition
HIGH
Condition/Opportunity HIGH
Opportunity Presence? (Y/N) NO
Habitat Physical Structure Condition HIGH
Landscape Patch Structure Condition LOW
Vegetation Composition Condition HIGH
Function Rating Summary
Function
Metrics/Notes
Rating
Hydrology
Condition
MEDIUM
Water Quality
Condition
HIGH
Condition/Opportunity
HIGH
Opportunity Presence? (Y/N)
NO
Habitat
Conditon
MEDIUM
Overall Wetland Rating MEDIUM
NC WAM WETLAND ASSESSMENT FORM
Accompanies User Manual Version 4.1
rating Laicuiator version 4.-1
Wetland Site Name Amberleigh Shores Phase II Basin 3 Date 11/17/17
WetlandTypel Basin Wetland Assessor Name/Organization SEGi
Level III Ecoregion Middle Atlantic Coastal Plain Nearest Named Water Body Pages Creek
River Basin Cape Fear USGS 8 -Digit Catalogue Unit 03030005
f Yes (•` No Precipitation within 48 hrs? Latitude/Lonaitude (deci-dearees) 34.284210 / -77.802822
Evidence of stressors affecting the assessment area (may not be within the assessment area)
Please circle and/or make note on last page if evidence of stressors is apparent. Consider departure from reference, if
appropriate, in recent past (for instance, approximately within 10 years). Noteworthy stressors include, but are not limited
to the following.
• Hydrological modifications (examples: ditches, dams, beaver dams, dikes, berms, ponds, etc.)
• Surface and sub -surface discharges into the wetland (examples: discharges containing obvious pollutants, presence of nearby
septic tanks, underground storage tanks (USTs), hog lagoons, etc.)
• Signs of vegetation stress (examples: vegetation mortality, insect damage, disease, storm damage, salt intrusion, etc.)
• Habitat/plant community alteration (examples: mowing, clear -cutting, exotics, etc.)
Is the assessment area intensively managed? (- Yes (: No
Regulatory Considerations (select all that apply to the assessment area)
F_ Anadromous fish
F_ Federally protected species or State endangered or threatened species
F_ NCDWQ riparian buffer rule in effect
F_ Abuts a Primary Nursery Area (PNA)
F_ Publicly owned property
F_ N.C. Division of Coastal Management Area of Environmental Concern (AEC) (including buffer)
F_ Abuts a stream with a NCDWQ classification of SA or supplemental classifications of HQW, ORW, or Trout
F_ Designated NCNHP reference community
F_ Abuts a 303(d) -listed stream or a tributary to a 303(d) -listed stream
What type of natural stream is associated with the wetland, if any? (check all that apply)
(- Blackwater
Brownwater
F_ Tidal (if tidal, check one of the following boxes) (` Lunar (` Wind C Both
Is the assessment area on a coastal island? (- Yes (: No
Is the assessment area's surface water storage capacity or duration substantially altered by beaver?
Does the assessment area experience overbank flooding during normal rainfall conditions?
C- Yes (:' No
(" Yes (: No
1. Ground Surface Condition/Vegetation Condition - assessment area condition metric
Check a box in each column. Consider alteration to the ground surface (GS) in the assessment area and vegetation structure
(VS) in the assessment area. Compare to reference wetland if applicable (see User Manual). If a reference is not applicable,
then rate the assessment area based on evidence of an effect.
GS VS
(: A (: A Not severely altered
(` B (` B Severely altered over a majority of the assessment area (ground surface alteration examples: vehicle tracks, excessive
sedimentation, fire -plow lanes, skidder tracks, bedding, fill, soil compaction, obvious pollutants) (vegetation structure
alteration examples: mechanical disturbance, herbicides, salt intrusion [where appropriate], exotic species, grazing,
less diversity [if appropriate], hydrologic alteration)
2. Surface and Sub -Surface Storage Capacity and Duration - assessment area condition metric
Check a box in each column. Consider surface storage capacity and duration (Surf) and sub -surface storage capacity and
duration (Sub). Consider both increase and decrease in hydrology. Refer to the current NRCS lateral effect of ditching guidance for
North Carolina hydric soils (see USACE Wilmington District website) for the zone of influence of ditches in hydric soils. A ditch
<_ 1 foot deep is considered to affect surface water only, while a ditch > 1 foot deep is expected to affect both surface and ditch
sub -surface water. Consider tidal flooding regime, if applicable.
Surf Sub
( A (` A Water storage capacity and duration are not altered.
v B (: B Water storage capacity or duration are altered, but not substantially (typically, not sufficient to change vegetation).
C C (` C Water storage capacity or duration are substantially altered (typically, alteration sufficient to result in vegetation
change) (examples: draining, flooding, soil compaction, filling, excessive sedimentation, underground utility lines).
3. Water Storage/Surface Relief -assessment area/wetland type condition metric (answer for non -marsh wetlands only)
Check a box in each column for each group below. Select the appropriate storage for the assessment area (AA) and the wetland
type (WT).
AA WT
3a. (" A (" A Majority of wetland with depressions able to pond water > 1 foot deep
( B (* B Majority of wetland with depressions able to pond water 6 inches to 1 foot deep
I'* C (" C Majority of wetland with depressions able to pond water 3 to 6 inches deep
( D (" D Depressions able to pond water < 3 inches deep
3b. ( A Evidence that maximum depth of inundation is greater than 2 feet
( B Evidence that maximum depth of inundation is between 1 and 2 feet
is C Evidence that maximum depth of inundation is less than 1 foot
4. Soil Texture/Structure - assessment area condition metric
Check a box from each of the three soil property groups below. Dig soil profile in the dominant assessment area landscape
feature. Make soil observations within the 12 inches. Use most recent National Technical Committee for Hydric Soils guidance for
regional indicators.
4a. f" A Sandy soil
(' B Loamy or clayey soils exhibiting redoximorphic features (concentrations, depletions, or rhizospheres)
(' C Loamy or clayey soils not exhibiting redoximorphic features
(' D Loamy or clayey gleyed soil
E Histosol or histic epipedon
4b. A Soil ribbon < 1 inch
B Soil ribbon >- 1 inch
4c. (' A No peat or muck presence
B A peat or muck presence
5. Discharge into Wetland - opportunity metric
Check a box in each column. Consider surface pollutants or discharges (Surf) and sub -surface pollutants or discharges (Sub).
Examples of sub -surface discharges include presence of nearby septic tank, underground storage tank (UST), etc.
Surf Sub
t+ A (: A Little or no evidence of pollutants or discharges entering the assessment area
t B C B Noticeable evidence of pollutants or discharges entering the wetland and stressing, but not overwhelming the
treatment capacity of the assessment area
t C t C Noticeable evidence of pollutants or discharges (pathogen, particulate, or soluble) entering the assessment area and
potentially overwhelming the treatment capacity of the wetland (water discoloration, dead vegetation, excessive
sedimentation, odor)
6. Land Use - opportunity metric
Check all that apply (at least one box in each column). Evaluation involves a GIS effort with field adjustment. Consider sources
draining to assessment area within entire upstream watershed (WS), within 5 miles and within the watershed draining to the
assessment area (5M), and within 2 miles and within the watershed draining to the assessment area (2M). Effective riparian buffers
are considered to be 50 feet wide in the Coastal Plain and Piedmont ecoregions and 30 feet wide in the Blue Ridge Mountains ecoregion.
WS 5M 2M
F_ A F_ A A >- 10% impervious surfaces
F_ B F_ B B < 10% impervious surfaces
F_ C F_ C C Confined animal operations (or other local, concentrated source of pollutants)
F_ D F_ D D >_ 20% coverage of pasture
F_ E F_ E E >_ 20% coverage of agricultural land (regularly plowed land)
F_ F F_ F F >_ 20% coverage of maintained grass/herb
F_ G F_ G G >_ 20% coverage of clear-cut land
F7 H F-7 H H Little or no opportunity to improve water quality. Lack of opportunity may result from hydrologic alterations
that prevent drainage or overbank flow from affecting the assessment area.
Wetland Acting as Vegetated Buffer - assessment area/wetland complex condition metric
7a. Is assessment area within 50 feet of a tributary or other open water?
(' Yes is No If Yes, continue to 7b. If No, skip to Metric 8.
Wetland buffer need only be present on one side of the water body. Make buffer judgment based on the average width of the wetland.
Record a note if a portion of the buffer has been removed or disturbed.
7b. How much of the first 50 feet from the bank is weltand? Descriptor E should be selected if ditches effectively bypass the buffer.
( A >- 50 feet
( B From 30 to < 50 feet
(' C From 15 to < 30 feet
(' D From 5 to < 15 feet
{" E < 5 feet or buffer bypassed by ditches
7c. Tributary width. If the tributary is anastomosed, combine widths of channels/braids for a total width.
('' <- 15 -feet wide (- > 15 -feet wide (- Other open water (no tributary present)
7d. Do roots of assessment area vegetation extend into the bank of the tributary/open water?
("' Yes ('' No
7e. Is tributary or other open water sheltered or exposed?
C Sheltered - adjacent open water with width < 2500 feet and no regular boat traffic.
C Exposed - adjacent open water with width >- 2500 feet or regular boat traffic.
8.
Wetland Width at the Assessment Area — wetland type/wetland complex metric (evaluate for riparian wetlands only)
Check
a box in each column. Select the average width for the wetland type at the assessment area (WT)
and
the wetland complex at the assessment areas (WC). See User Manual for WT and WC boundaries.
WT
WC
(" A
(" A >_ 100 feet
(" B
r B From 80 to < 100 feet
(" C
(" C From 50 to < 80 feet
(" D
(" D From 40 to < 50 feet
(" E
(" E From 30 to < 40 feet
(" F
(" F From 15 to < 30 feet
(* G
(*` G From 5 to < 15 feet
(` H
(' H < 5 feet
9.
Inundation Duration — assessment area condition metric
Answer for assessment area dominant landform.
f: A
Evidence of short -duration inundation (< 7 consecutive days)
C" B
Evidence of saturation, without evidence of inundation
C" C
Evidence of long -duration inundation or very long -duration inundation (7 to 30 consecutive days or more)
10.
Indicators of Deposition — assessment area condition metric
Consider recent deposition only (no plant growth since deposition).
f: A
Sediment deposition is not excessive, but at approximately natural levels.
C" B
Sediment deposition is excessive, but not overwhelming the wetland.
(` C
Sediment deposition is excessive and is overwhelming the wetland.
11.
Wetland
Size — wetland type/wetland complex condition metric
Check
a box in each column. Involves a GIS effort with field adjustment. This metric evaluates three aspects of the wetland area: the
size
of the wetland type (WT), the size of the wetland complex (WC), and the size of the forested wetland (FW) (if applicable, see User
Manual).
See the User Manual for boundaries of these evaluation areas. If assessment area is clear-cut, select "K" for the FW column.
WT
WC FW (if applicable)
('A
('A ("A 2! 500
(" B
(" B (' B From 100 to < 500 acres
(" C
(" C (' C From 50 to < 100 acres
(" D
(" D t " D From 25 to < 50 acres
(" E
(" E r— E From 10 to < 25 acres
(" F
( F (' F From 5 to < 10 acres
(" G
(' G t— G From 1 to < 5 acres
re
re t -"'H From 0.5 to<1acre
(" I
(" I r— I From 0.1 to < 0.5 acre
(" J
(" J (' J From 0.01 to < 0.1 acre
(" K
(" K (' K < 0.01 acre or assessment area is clear-cut
12.
Wetland
Intactness — wetland type condition metric (evaluate for Pocosins only)
(' A
Pocosin is the full extent (>_ 90%) of its natural landscape size.
t" B
Pocosin is < 90% of the full extent of its natural landscape size.
13.
Connectivity
to Other Natural Areas — landscape condition metric
13a.
Check appropriate box(es) (a box may be checked in each column). Involves a GIS effort with field adjustment. This
evaluates whether the wetland is well connected (Well) and/or loosely connected (Loosely) to the landscape patch, the contiguous
metric naturally vegetated area and open water (if appropriate). Boundaries are formed by four -lane roads, regularly maintained utility
line corridors the width of a four -lane road or wider, urban landscapes, fields (pasture open and agriculture), or water > 300 feet wide.
Well Loosely
( A (' A >_ 500 acres
( B (' B From 100 to < 500 acres
(' C (' C From 50 to < 100 acres
(' D (: D From 10 to < 50 acres
(: E (' E < 10 acres
(' F (' F Wetland type has a poor or no connection to other natural habitats
13b.
Evaluate for marshes only.
(" Yes (— No Wetland type has a surface hydrology connection to open waters/stream or tidal wetlands.
14. Edge Effect — wetland type condition metric (skip for all marshes)
May involve a GIS effort with field adjustment. Estimate distance from wetland type boundary to artificial edges. Artificial edges include
non -forested areas >_ 40 feet wide such as fields, development, roads, regularly maintained utility line corridors and clear -cuts.
Consider the eight main points of the compass.
(' A No artificial edge within 150 feet in all directions
t: B No artificial edge within 150 feet in four (4) to seven (7) directions
(� C An artificial edge occurs within 150 feet in more than four (4) directions or assessment area is clear-cut
15. Vegetative Composition - assessment area condition metric (skip for all marshes and Pine Flat)
Co- A Vegetation is close to reference condition in species present and their proportions. Lower strata composed of appropriate
species, with exotic plants absent or sparse within the assessment area.
(' B Vegetation is different from reference condition in species diversity or proportions, but still largely composed of native species
characteristic of the wetland type. This may include communities of weedy native species that develop after clearcutting or
clearing. It also includes communities with exotics present, but not dominant, over a large portion of the expected strata.
(' C Vegetation severely altered from reference in composition. Expected species are unnaturally absent (planted stands of non -
characteristic species or at least one stratum inappropriately composed of a single species). Exotic species are dominant in
at least one stratum.
16. Vegetative Diversity - assessment area condition metric (evaluate for Non -tidal Freshwater Marsh only)
Co- A Vegetation diversity is high and is composed primarily of native species (<10% cover of exotics).
(' B Vegetation diversity is low or has > 10% to 50% cover of exotics.
t" C Vegetation is dominated by exotic species (>50% cover of exotics).
17. Vegetative Structure - assessment area/wetland type condition metric
17a. Is vegetation present?
(: Yes (- No If Yes, continue to 17b. If No, skip to Metric 18.
17b. Evaluate percent coverage of assessment area vegetation for all marshes only. Skip to 17c for non -marsh wetlands.
t" A >_ 25% coverage of vegetation
t` B < 25% coverage of vegetation
17c. Check a box in each column for each stratum. Evaluate this portion of the metric for non -marsh wetlands. Consider structure
in airspace
above the
assessment area (AA) and the wetland type (WT) separately.
AA
WT
o(:
A
f: A
Canopy closed, or nearly closed, with natural gaps associated with natural processes
t- B
B
Canopy present, but opened more than natural gaps
U
C' C
C
Canopy sparse or absent
o
i-' A
A
Dense mid-story/sapling layer
t-' B
B
Moderate density mid-story/sapling layer
t: C
C
Mid-story/sapling layer sparse or absent
t-' A I'- A Dense shrub layer
B ( B Moderate density shrub layer
U) fr C C Shrub layer sparse or absent
fr A A Dense herb layer
f: B B Moderate density herb layer
_ f'' C {: C Herb layer sparse or absent
18. Snags - wetland type condition metric
(` A Large snags (more than one) are visible (> 12 -inches DBH, or large relative to species present and landscape stability).
(o B Not A
19. Diameter Class Distribution - wetland type condition metric
(` A Majority of canopy trees have stems > 6 inches in diameter at breast height (DBH); many large trees (> 12 inches DBH) are
present.
(o B Majority of canopy trees have stems between 6 and 12 inches DBH, few are > 12 -inch DBH.
(` C Majority of canopy trees are < 6 inches DBH or no trees.
20. Large Woody Debris - wetland type condition metric
Include both natural debris and man -placed natural debris.
(: A Large logs (more than one) are visible (> 12 inches in diameter, or large relative to species present and landscape stability).
(- B Not A
21. Vegetation/Open Water Dispersion - wetland type/open water condition metric (evaluate for Non -Tidal Freshwater
Marsh only)
Select the figure that best describes the amount of interspersion between vegetation and open water in the growing season. Patterned
areas indicate vegetated areas, while solid white areas indicate open water.
(`A (`B (: C i'D
� I
s
22. Hydrologic Connectivity- assessment area condition metric (evaluate for riparian wetlands only)
Examples of activities that may severely alter hydrologic connectivity include intensive
ditching, fill, sedimentation, channelization, diversion, man-made berms, beaver dams, and stream incision.
A Overbank and overland flow are not severely altered in the assessment area.
B Overbank flow is severely altered in the assessment area.
I" C Overland flow is severely altered in the assessment area.
�" D Both overbank and overland flow are severely altered in the assessment area.
NC WAM Wetland Rating Sheet
Accompanies User Manual Version 4.1
Rating Calculator Version 4.1
Wetland Site Name Amberleigh Shores Phase II Basin 3 Date 11/17/17
Wetland Type Basin Wetland Assessor Name/Organization SEGi
Notes on Field Assessment Form (Y/N) NO
Presence of regulatory considerations (Y/N) NO
Wetland is intensively managed (Y/N) NO
Assessment area is located within 50 feet of a natural tributary or other open water (Y/N) NO
Assessment area is substantially altered by beaver (Y/N) NO
Assessment area experiences overbank flooding during normal rainfall conditions (Y/N) NO
Assessment area is on a coastal island (Y/N) NO
Sub -function Rating Summary
Function
Sub -function
Metrics
Rating
Hydrology
Surface Storage and Retention
Condition
NA
HIGH
Sub -Surface Storage and Retention
Condition
NA
Water Quality
Pathogen Change
Condition
NA
Conditon
MEDIUM
Condition/Opportunity
NA
Opportunity Presence? (Y/N)
NA
Particulate Change
Condition
NA
Condition/Opportunity
NA
Opportunity Presence? (Y/N)
NA
Soluble Change
Condition
NA
Condition/Opportunity
NA
Opportunity Presence? (Y/N)
NA
Physical Change
Condition
NA
Condition/Opportunity
NA
Opportunity Presence? (Y/N)
NA
Pollution Change
Condition
HIGH
Condition/Opportunity
HIGH
Opportunity Presence? (Y/N)
NO
Habitat
Physical Structure
Condition
HIGH
Landscape Patch Structure
Condition
LOW
Vegetation Composition
Condition
HIGH
Function Rating Summary
Function
Metrics/Notes
Rating
Hydrology
Condition
HIGH
Water Quality
Condition
HIGH
Condition/Opportunity
HIGH
Opportunity Presence? (Y/N)
NO
Habitat
Conditon
MEDIUM
Overall Wetland Rating HIGH
NC WAM WETLAND ASSESSMENT FORM
Accompanies User Manual Version 4.1
mating %,aicuiaior version 4._1
Wetland Site Name Amberleigh Shores Phase II Headwater Forest Date 11/17/2017
Wetland Type Headwater Forest Assessor Name/Organization SEGi
Level III Ecoregion Middle Atlantic Coastal Plain Nearest Named Water Body Pages Creek
River Basin Cape Fear USGS 8 -Digit Catalogue Unit 03030005
f Yes f* No Precipitation within 48 hrs? Latitude/Longitude (deci-decrees) 34.284695 / -77.802463
Evidence of stressors affecting the assessment area (may not be within the assessment area)
Please circle and/or make note on last page if evidence of stressors is apparent. Consider departure from reference, if
appropriate, in recent past (for instance, approximately within 10 years). Noteworthy stressors include, but are not limited
to the following.
• Hydrological modifications (examples: ditches, dams, beaver dams, dikes, berms, ponds, etc.)
• Surface and sub -surface discharges into the wetland (examples: discharges containing obvious pollutants, presence of nearby
septic tanks, underground storage tanks (USTs), hog lagoons, etc.)
• Signs of vegetation stress (examples: vegetation mortality, insect damage, disease, storm damage, salt intrusion, etc.)
• Habitat/plant community alteration (examples: mowing, clear -cutting, exotics, etc.)
Is the assessment area intensively managed? (- Yes (: No
Regulatory Considerations (select all that apply to the assessment area)
F- Anadromous fish
F- Federally protected species or State endangered or threatened species
F_ NCDWQ riparian buffer rule in effect
F_ Abuts a Primary Nursery Area (PNA)
F_ Publicly owned property
F_ N.C. Division of Coastal Management Area of Environmental Concern (AEC) (including buffer)
F_ Abuts a stream with a NCDWQ classification of SA or supplemental classifications of HQW, ORW, or Trout
F_ Designated NCNHP reference community
F_ Abuts a 303(d) -listed stream or a tributary to a 303(d) -listed stream
What type of natural stream is associated with the wetland, if any? (check all that apply)
( Blackwater
{ Brownwater
F Tidal (if tidal, check one of the following boxes) (` Lunar (` Wind (` Both
Is the assessment area on a coastal island? C Yes (*- No
Is the assessment area's surface water storage capacity or duration substantially altered by beaver? Yes No
Does the assessment area experience overbank flooding during normal rainfall conditions? (- Yes [: No
Ground Surface Condition/Vegetation Condition - assessment area condition metric
Check a box in each column. Consider alteration to the ground surface (GS) in the assessment area and vegetation structure
(VS) in the assessment area. Compare to reference wetland if applicable (see User Manual). If a reference is not applicable,
then rate the assessment area based on evidence of an effect.
GS VS
A A Not severely altered
f" B B Severely altered over a majority of the assessment area (ground surface alteration examples: vehicle tracks, excessive
sedimentation, fire -plow lanes, skidder tracks, bedding, fill, soil compaction, obvious pollutants) (vegetation structure
alteration examples: mechanical disturbance, herbicides, salt intrusion [where appropriate], exotic species, grazing,
less diversity [if appropriate], hydrologic alteration)
Surface and Sub -Surface Storage Capacity and Duration - assessment area condition metric
Check a box in each column. Consider surface storage capacity and duration (Surf) and sub -surface storage capacity and
duration (Sub). Consider both increase and decrease in hydrology. Refer to the current NRCS lateral effect of ditching guidance for
North Carolina hydric soils (see USACE Wilmington District website) for the zone of influence of ditches in hydric soils. A ditch
<_ 1 foot deep is considered to affect surface water only, while a ditch > 1 foot deep is expected to affect both surface and ditch
sub -surface water. Consider tidal flooding regime, if applicable.
Surf Sub
(* A [* A Water storage capacity and duration are not altered.
C B (' B Water storage capacity or duration are altered, but not substantially (typically, not sufficient to change vegetation).
C C C C Water storage capacity or duration are substantially altered (typically, alteration sufficient to result in vegetation
change) (examples: draining, flooding, soil compaction, filling, excessive sedimentation, underground utility lines).
Water Storage/Surface Relief - assessment area/wetland type condition metric (answer for non -marsh wetlands only)
Check a box in each column for each group below. Select the appropriate storage for the assessment area (AA) and the wetland
type (WT).
AA WT
3a. ( A A Majority of wetland with depressions able to pond water > 1 foot deep
( B B Majority of wetland with depressions able to pond water 6 inches to 1 foot deep
(: C C Majority of wetland with depressions able to pond water 3 to 6 inches deep
( D C D Depressions able to pond water < 3 inches deep
3b. C' A Evidence that maximum depth of inundation is greater than 2 feet
( B Evidence that maximum depth of inundation is between 1 and 2 feet
4. Soil Texture/Structure - assessment area condition metric
Check a box from each of the three soil property groups below. Dig soil profile in the dominant assessment area landscape
feature. Make soil observations within the 12 inches. Use most recent National Technical Committee for Hydric Soils guidance for
regional indicators.
4a. A Sandy soil
f' B Loamy or clayey soils exhibiting redoximorphic features (concentrations, depletions, or rhizospheres)
f' C Loamy or clayey soils not exhibiting redoximorphic features
f' D Loamy or clayey gleyed soil
f E Histosol or histic epipedon
4b. A Soil ribbon < 1 inch
f' B Soil ribbon >_ 1 inch
4c. C A No peat or muck presence
( B A peat or muck presence
5. Discharge into Wetland - opportunity metric
Check a box in each column. Consider surface pollutants or discharges (Surf) and sub -surface pollutants or discharges (Sub).
Examples of sub -surface discharges include presence of nearby septic tank, underground storage tank (UST), etc.
Surf Sub
(: A (: A Little or no evidence of pollutants or discharges entering the assessment area
C' B C' B Noticeable evidence of pollutants or discharges entering the wetland and stressing, but not overwhelming the
treatment capacity of the assessment area
C' C C' C Noticeable evidence of pollutants or discharges (pathogen, particulate, or soluble) entering the assessment area and
potentially overwhelming the treatment capacity of the wetland (water discoloration, dead vegetation, excessive
sedimentation, odor)
Land Use - opportunity metric
Check all that apply (at least one box in each column). Evaluation involves a GIS effort with field adjustment. Consider sources
draining to assessment area within entire upstream watershed (WS), within 5 miles and within the watershed draining to the
assessment area (5M), and within 2 miles and within the watershed draining to the assessment area (2M). Effective riparian buffers
are considered to be 50 feet wide in the Coastal Plain and Piedmont ecoregions and 30 feet wide in the Blue Ridge Mountains ecoregion.
WS 5M 2M
F_ A r A r A >_ 10% impervious surfaces
F_ B r B r B < 10% impervious surfaces
F_ C F_ C r C Confined animal operations (or other local, concentrated source of pollutants)
F_ D F_ D F_ D >_ 20% coverage of pasture
F_ E F_ E F_ E >_ 20% coverage of agricultural land (regularly plowed land)
F_ F F_ F F_ F >_ 20% coverage of maintained grass/herb
F_ G F_ G F_ G >_ 20% coverage of clear-cut land
P_' H F-_' H P_' H Little or no opportunity to improve water quality. Lack of opportunity may result from hydrologic alterations
that prevent drainage or overbank flow from affecting the assessment area.
Wetland Acting as Vegetated Buffer - assessment area/wetland complex condition metric
7a. Is assessment area within 50 feet of a tributary or other open water?
f' Yes (: No If Yes, continue to 7b. If No, skip to Metric 8.
Wetland buffer need only be present on one side of the water body. Make buffer judgment based on the average width of the wetland.
Record a note if a portion of the buffer has been removed or disturbed.
7b. How much of the first 50 feet from the bank is weltand? Descriptor E should be selected if ditches effectively bypass the buffer.
f' A >_ 50 feet
( B From 30 to < 50 feet
f' C From 15 to < 30 feet
( D From 5 to < 15 feet
f' E < 5 feet or buffer bypassed by ditches
7c. Tributary width. If the tributary is anastomosed, combine widths of channels/braids for a total width.
f~ <_ 15 -feet wide f~ > 15 -feet wide f' Other open water (no tributary present)
7d. Do roots of assessment area vegetation extend into the bank of the tributary/open water?
(- Yes (- No
7e. Is tributary or other open water sheltered or exposed?
(- Sheltered - adjacent open water with width < 2500 feet and no regular boat traffic.
C Exposed - adjacent open water with width >_ 2500 feet or regular boat traffic.
Wetland Width at the Assessment Area - wetland type/wetland complex metric (evaluate for riparian wetlands only)
Check a box
in each column. Select the average width for the wetland type at the assessment area (WT)
and the
wetland complex at the assessment areas (WC). See User Manual for WT and WC boundaries.
WT
WC
t- A
(' A
>_ 100 feet
( B
(' B
From 80 to < 100 feet
f' C
f• C
From 50 to < 80 feet
( D
f' D
From 40 to < 50 feet
( E
f' E
From 30 to < 40 feet
( F
f' F
From 15 to < 30 feet
(: G
I+ G
From 5 to < 15 feet
( H
f' H
< 5 feet
9. Inundation Duration - assessment area condition metric
Answer for assessment area dominant landform.
( A Evidence of short -duration inundation (< 7 consecutive days)
(: B Evidence of saturation, without evidence of inundation
C' C Evidence of long -duration inundation or very long -duration inundation (7 to 30 consecutive days or more)
10. Indicators of Deposition - assessment area condition metric
Consider recent deposition only (no plant growth since deposition).
{: A Sediment deposition is not excessive, but at approximately natural levels.
B Sediment deposition is excessive, but not overwhelming the wetland.
f' C Sediment deposition is excessive and is overwhelming the wetland.
11. Wetland Size - wetland type/wetland complex condition metric
Check a box in each column. Involves a GIS effort with field adjustment. This metric evaluates three aspects of the wetland area: the
size of the wetland type (WT), the size of the wetland complex (WC), and the size of the forested wetland (FW) (if applicable, see User
Manual). See the User Manual for boundaries of these evaluation areas. If assessment area is clear-cut, select "K" for the FW column.
WT WC FW (if applicable)
A A f A >_ 500 acres
(" B B r B From 100 to < 500 acres
(" C C r C From 50 to < 100 acres
" D D r D From 25 to < 50 acres
I: E E r E From 10 to < 25 acres
" F F r F From 5 to < 10 acres
" G I G r G From 1 to < 5 acres
" H H r H From 0.5 to < 1 acre
" I I I" I From 0.1 to < 0.5 acre
" J " J r J From 0.01 to < 0.1 acre
C K K I" K < 0.01 acre or assessment area is clear-cut
12. Wetland Intactness - wetland type condition metric (evaluate for Pocosins only)
(" A Pocosin is the full extent (>_ 90%) of its natural landscape size.
(" B Pocosin is < 90% of the full extent of its natural landscape size.
13. Connectivity to Other Natural Areas - landscape condition metric
13a. Check appropriate box(es) (a box may be checked in each column). Involves a GIS effort with field adjustment. This
evaluates whether the wetland is well connected (Well) and/or loosely connected (Loosely) to the landscape patch, the contiguous
metric naturally vegetated area and open water (if appropriate). Boundaries are formed by four -lane roads, regularly maintained utility
line corridors the width of a four -lane road or wider, urban landscapes, fields (pasture open and agriculture), or water > 300 feet wide.
Well Loosely
f' A {" A >_ 500 acres
f- B From 100 to < 500 acres
f' C" C From 50 to < 100 acres
f' D" D From 10 to < 50 acres
(: E E < 10 acres
( F F Wetland type has a poor or no connection to other natural habitats
13b. Evaluate for marshes only.
(- Yes (" No Wetland type has a surface hydrology connection to open waters/stream or tidal wetlands.
14. Edge Effect - wetland type condition metric (skip for all marshes)
May involve a GIS effort with field adjustment. Estimate distance from wetland type boundary to artificial edges. Artificial edges include
non -forested areas >_ 40 feet wide such as fields, development, roads, regularly maintained utility line corridors and clear -cuts.
Consider the eight main points of the compass.
( A No artificial edge within 150 feet in all directions
" B No artificial edge within 150 feet in four (4) to seven (7) directions
f: C An artificial edge occurs within 150 feet in more than four (4) directions or assessment area is clear-cut
15. Vegetative Composition - assessment area condition metric (skip for all marshes and Pine Flat)
t� A Vegetation is close to reference condition in species present and their proportions. Lower strata composed of appropriate
species, with exotic plants absent or sparse within the assessment area.
t- B Vegetation is different from reference condition in species diversity or proportions, but still largely composed of native species
characteristic of the wetland type. This may include communities of weedy native species that develop after clearcutting or
clearing. It also includes communities with exotics present, but not dominant, over a large portion of the expected strata.
t- C Vegetation severely altered from reference in composition. Expected species are unnaturally absent (planted stands of non -
characteristic species or at least one stratum inappropriately composed of a single species). Exotic species are dominant in
at least one stratum.
16. Vegetative Diversity - assessment area condition metric (evaluate for Non -tidal Freshwater Marsh only)
A Vegetation diversity is high and is composed primarily of native species (<10% cover of exotics).
(" B Vegetation diversity is low or has > 10% to 50% cover of exotics.
(" C Vegetation is dominated by exotic species (>50% cover of exotics).
17. Vegetative Structure — assessment area/wetland type condition metric
17a. Is vegetation present?
(: Yes (-" No If Yes, continue to 17b. If No, skip to Metric 18.
17b. Evaluate percent coverage of assessment area vegetation for all marshes only. Skip to 17c for non -marsh wetlands.
C' A >_ 25% coverage of vegetation
C' B < 25% coverage of vegetation
17c. Check a box in each column for each stratum. Evaluate this portion of the metric for non -marsh wetlands. Consider structure
in airspace above the assessment area (AA) and the wetland type (WT) separately.
AA WT
or A (: A Canopy closed, or nearly closed, with natural gaps associated with natural processes
r B r B Canopy present, but opened more than natural gaps
v r C r C Canopy sparse or absent
OL' r A r A Dense mid-story/sapling layer
r B r B Moderate density mid-story/sapling layer
r C r C Mid-story/sapling layer sparse or absent
r: A r A Dense shrub layer
r B r: B Moderate density shrub layer
r C r C Shrub layer sparse or absent
r A r A Dense herb layer
15 r B r B Moderate density herb layer
_ r C r C Herb layer sparse or absent
18. Snags — wetland type condition metric
(" A Large snags (more than one) are visible (> 12 -inches DBH, or large relative to species present and landscape stability).
B Not A
19. Diameter Class Distribution — wetland type condition metric
A Majority of canopy trees have stems > 6 inches in diameter at breast height (DBH); many large trees (> 12 inches DBH) are
present.
I B Majority of canopy trees have stems between 6 and 12 inches DBH, few are > 12 -inch DBH.
(- C Majority of canopy trees are < 6 inches DBH or no trees.
20. Large Woody Debris — wetland type condition metric
Include both natural debris and man -placed natural debris.
A Large logs (more than one) are visible (> 12 inches in diameter, or large relative to species present and landscape stability).
B Not A
21. Vegetation/Open Water Dispersion — wetland type/open water condition metric (evaluate for Non -Tidal Freshwater
Marsh only)
Select the figure that best describes the amount of interspersion between vegetation and open water in the growing season. Patterned
areas indicate vegetated areas, while solid white areas indicate open water.
(" A f B (" C D
22. Hydrologic Connectivity— assessment area condition metric (evaluate for riparian wetlands only)
Examples of activities that may severely alter hydrologic connectivity include intensive
ditching, fill, sedimentation, channelization, diversion, man-made berms, beaver dams, and stream incision.
A Overbank and overland flow are not severely altered in the assessment area.
B Overbank flow is severely altered in the assessment area.
C Overland flow is severely altered in the assessment area.
D Both overbank and overland flow are severely altered in the assessment area.
Notes
NC WAM Wetland Rating Sheet
Accompanies User Manual Version 4.1
Rating Calculator Version 4.1
Wetland Site Name Amberleigh Shores Phase II Date
Wetland Type Headwater Forest Assessor Name/Organization
Notes on Field Assessment Form (Y/N)
Presence of regulatory considerations (Y/N)
Wetland is intensively managed (Y/N)
Assessment area is located within 50 feet of a natural tributary or other open water (Y/N)
Assessment area is substantially altered by beaver (Y/N)
Assessment area experiences overbank flooding during normal rainfall conditions (Y/N)
Assessment area is on a coastal island (Y/N)
Sub -function Rating Summary
11/17/18
SEGi
NO
Function Sub -function Metrics Rating
Hydrology Surface Storage and Retention Condition HIGH
Sub -Surface Storage and Retention Condition HIGH
Water Quality Pathogen Change Condition HIGH
Vegetation Composition Condition HIGH
Function Rating Summary
Function
Condition/Opportunity
HIGH
Hydrology
Opportunity Presence? (Y/N)
NO
Particulate Change
Condition
HIGH
Condition/Opportunity
NA
Opportunity Presence? (Y/N)
NA
Soluble Change
Condition
MEDIUM
Condition/Opportunity
MEDIUM
Opportunity Presence? (Y/N)
NO
Physical Change
Condition
LOW
Condition/Opportunity
LOW
Opportunity Presence? (Y/N)
NO
Pollution Change
Condition
NA
Condition/Opportunity
NA
Opportunity Presence? (Y/N)
NA
Habitat Physical Structure
Condition
HIGH
Landscape Patch Structure
Condition
HIGH
Vegetation Composition Condition HIGH
Function Rating Summary
Function
Metrics/Notes
Rating
Hydrology
Condition
HIGH
Water Quality
Condition
HIGH
Condition/Opportunity
HIGH
Opportunity Presence? (Y/N)
NO
Habitat
Conditon
HIGH
Overall Wetland Rating HIGH
NC WAM WETLAND ASSESSMENT FORM
Accompanies User Manual Version 4.1
rating L aicuiator version 4.l
Wetland Site Name Amberleigh Shores Phase II Isolated Date 11/17/2017
Wetland Type Basin Wetland Assessor Name/Organization SEGi
Level III Ecoregion Middle Atlantic Coastal Plain Nearest Named Water Body Pages Creek
River Basin Cape Fear USGS 8 -Digit Catalogue Unit 03030005
r -Yes ro- No Precipitation within 48 hrs? Latitude/Lonaitude (deci-dearees) 34.284577 / -77.801509
Evidence of stressors affecting the assessment area (may not be within the assessment area)
Please circle and/or make note on last page if evidence of stressors is apparent. Consider departure from reference, if
appropriate, in recent past (for instance, approximately within 10 years). Noteworthy stressors include, but are not limited
to the following.
• Hydrological modifications (examples: ditches, dams, beaver dams, dikes, berms, ponds, etc.)
• Surface and sub -surface discharges into the wetland (examples: discharges containing obvious pollutants, presence of nearby
septic tanks, underground storage tanks (USTs), hog lagoons, etc.)
• Signs of vegetation stress (examples: vegetation mortality, insect damage, disease, storm damage, salt intrusion, etc.)
• Habitat/plant community alteration (examples: mowing, clear -cutting, exotics, etc.)
Is the assessment area intensively managed? ;Yes F, No
Regulatory Considerations (select all that apply to the assessment area)
F_ Anadromous fish
7 Federally protected species or State endangered or threatened species
F NCDWQ riparian buffer rule in effect
Abuts a Primary Nursery Area (PNA)
Publicly owned property
F N.C. Division of Coastal Management Area of Environmental Concern (AEC) (including buffer)
7 Abuts a stream with a NCDWQ classification of SA or supplemental classifications of HQW, ORW, or Trout
F Designated NCNHP reference community
F_ Abuts a 303(d) -listed stream or a tributary to a 303(d) -listed stream
What type of natural stream is associated with the wetland, if any? (check all that apply)
Blackwater
Brownwater
Tidal (if tidal, check one of the following boxes) ;Lunar Wind ; Both
Is the assessment area on a coastal island? ;Yes F,'No
Is the assessment area's surface water storage capacity or duration substantially altered by beaver? Yes �•� No
Does the assessment area experience overbank flooding during normal rainfall conditions? ;Yes F,'No
Ground Surface Condition/Vegetation Condition — assessment area condition metric
Check a box in each column. Consider alteration to the ground surface (GS) in the assessment area and vegetation structure
(VS) in the assessment area. Compare to reference wetland if applicable (see User Manual). If a reference is not applicable,
then rate the assessment area based on evidence of an effect.
GS VS
F,'A FA Not severely altered
B; B Severely altered over a majority of the assessment area (ground surface alteration examples: vehicle tracks, excessive
sedimentation, fire -plow lanes, skidder tracks, bedding, fill, soil compaction, obvious pollutants) (vegetation structure
alteration examples: mechanical disturbance, herbicides, salt intrusion [where appropriate], exotic species, grazing,
less diversity [if appropriate], hydrologic alteration)
Surface and Sub -Surface Storage Capacity and Duration — assessment area condition metric
Check a box in each column. Consider surface storage capacity and duration (Surf) and sub -surface storage capacity and
duration (Sub). Consider both increase and decrease in hydrology. Refer to the current NRCS lateral effect of ditching guidance for
North Carolina hydric soils (see USACE Wilmington District website) for the zone of influence of ditches in hydric soils. A ditch
<_ 1 foot deep is considered to affect surface water only, while a ditch > 1 foot deep is expected to affect both surface and ditch
sub -surface water. Consider tidal flooding regime, if applicable.
Surf Sub
K—,A r,A Water storage capacity and duration are not altered.
B F,' B Water storage capacity or duration are altered, but not substantially (typically, not sufficient to change vegetation).
;C ,C Water storage capacity or duration are substantially altered (typically, alteration sufficient to result in vegetation
change) (examples: draining, flooding, soil compaction, filling, excessive sedimentation, underground utility lines).
3. Water Storage/Surface Relief -assessment area/wetland type condition metric (answer for non -marsh wetlands only)
Check a box in each column for each group below. Select the appropriate storage for the assessment area (AA) and the wetland
type (WT).
AA WT
3a. A ,A Majority of wetland with depressions able to pond water > 1 foot deep
B; B Majority of wetland with depressions able to pond water 6 inches to 1 foot deep
C; C Majority of wetland with depressions able to pond water 3 to 6 inches deep
D ; D Depressions able to pond water < 3 inches deep
3b. A Evidence that maximum depth of inundation is greater than 2 feet
B Evidence that maximum depth of inundation is between 1 and 2 feet
C Evidence that maximum depth of inundation is less than 1 foot
4. Soil Texture/Structure - assessment area condition metric
Check a box from each of the three soil property groups below. Dig soil profile in the dominant assessment area landscape
feature. Make soil observations within the 12 inches. Use most recent National Technical Committee for Hydric Soils guidance for
regional indicators.
4a.;A Sandy soil
B Loamy or clayey soils exhibiting redoximorphic features (concentrations, depletions, or rhizospheres)
C Loamy or clayey soils not exhibiting redoximorphic features
D Loamy or clayey gleyed soil
E Histosol or histic epipedon
4b. A Soil ribbon < 1 inch
B Soil ribbon >- 1 inch
4c. A No peat or muck presence
B A peat or muck presence
5. Discharge into Wetland - opportunity metric
Check a box in each column. Consider surface pollutants or discharges (Surf) and sub -surface pollutants or discharges (Sub).
Examples of sub -surface discharges include presence of nearby septic tank, underground storage tank (UST), etc.
Surf Sub
A•;A Little or no evidence of pollutants or discharges entering the assessment area
B; B Noticeable evidence of pollutants or discharges entering the wetland and stressing, but not overwhelming the
treatment capacity of the assessment area
;C;C Noticeable evidence of pollutants or discharges (pathogen, particulate, or soluble) entering the assessment area and
potentially overwhelming the treatment capacity of the wetland (water discoloration, dead vegetation, excessive
sedimentation, odor)
6. Land Use - opportunity metric
Check all that apply (at least one box in each column). Evaluation involves a GIS effort with field adjustment. Consider sources
draining to assessment area within entire upstream watershed (WS), within 5 miles and within the watershed draining to the
assessment area (5M), and within 2 miles and within the watershed draining to the assessment area (2M). Effective riparian buffers
are considered to be 50 feet wide in the Coastal Plain and Piedmont ecoregions and 30 feet wide in the Blue Ridge Mountains ecoregion.
WS 5M 2M
F A F A F A >- 10% impervious surfaces
r B r B r B < 10% impervious surfaces
r C F C F C Confined animal operations (or other local, concentrated source of pollutants)
F D F D F D >_ 20% coverage of pasture
F_ E r E F_ E >_ 20% coverage of agricultural land (regularly plowed land)
F F r F F F >_ 20% coverage of maintained grass/herb
F G F G F G >_ 20% coverage of clear-cut land
I✓ H r H r H Little or no opportunity to improve water quality. Lack of opportunity may result from hydrologic alterations
that prevent drainage or overbank flow from affecting the assessment area.
Wetland Acting as Vegetated Buffer - assessment area/wetland complex condition metric
7a. Is assessment area within 50 feet of a tributary or other open water?
;Yes F,' No If Yes, continue to 7b. If No, skip to Metric 8.
Wetland buffer need only be present on one side of the water body. Make buffer judgment based on the average width of the wetland.
Record a note if a portion of the buffer has been removed or disturbed.
7b. How much of the first 50 feet from the bank is weltand? Descriptor E should be selected if ditches effectively bypass the buffer.
A >- 50 feet
B From 30 to < 50 feet
C From 15 to < 30 feet
D From 5 to < 15 feet
E < 5 feet or buffer bypassed by ditches
7c. Tributary width. If the tributary is anastomosed, combine widths of channels/braids for a total width.
<- 15 -feet wide; > 15 -feet wide; Other open water (no tributary present)
7d. Do roots of assessment area vegetation extend into the bank of the tributary/open water?
Yes; No
7e. Is tributary or other open water sheltered or exposed?
Sheltered - adjacent open water with width < 2500 feet and no regular boat traffic.
Exposed - adjacent open water with width >- 2500 feet or regular boat traffic.
8. Wetland Width at the Assessment Area — wetland type/wetland complex metric (evaluate for riparian wetlands only)
Check a box in each column. Select the average width for the wetland type at the assessment area (WT)
and the wetland complex at the assessment areas (WC). See User Manual for WT and WC boundaries.
WT WC
A A >_ 100 feet
B; B From 80 to < 100 feet
C; C From 50 to < 80 feet
D; D From 40 to < 50 feet
E; E From 30 to < 40 feet
F; F From 15 to < 30 feet
G; G From 5 to < 15 feet
H H < 5 feet
9. Inundation Duration — assessment area condition metric
Answer for assessment area dominant landform.
A Evidence of short -duration inundation (< 7 consecutive days)
B Evidence of saturation, without evidence of inundation
C Evidence of long -duration inundation or very long -duration inundation (7 to 30 consecutive days or more)
10. Indicators of Deposition — assessment area condition metric
Consider recent deposition only (no plant growth since deposition).
A Sediment deposition is not excessive, but at approximately natural levels.
B Sediment deposition is excessive, but not overwhelming the wetland.
C Sediment deposition is excessive and is overwhelming the wetland.
11. Wetland Size — wetland type/wetland complex condition metric
Check a box in each column. Involves a GIS effort with field adjustment. This metric evaluates three aspects of the wetland area: the
size of the wetland type (WT), the size of the wetland complex (WC), and the size of the forested wetland (FW) (if applicable, see User
Manual). See the User Manual for boundaries of these evaluation areas. If assessment area is clear-cut, select "K" for the FW column.
WT WC FW (if applicable)
L]A A A >_ 500 acres
u B B B From 100 to < 500 acres
C C C From 50 to < 100 acres
D D D From 25 to < 50 acres
E E E From 10 to < 25 acres
F F F From 5 to < 10 acres
G G G From 1 to < 5 acres
H H H From 0.5 to < 1 acre
I I I From 0.1 to < 0.5 acre
J J J From 0.01 to < 0.1 acre
K K K < 0.01 acre or assessment area is clear-cut
12. Wetland Intactness — wetland type condition metric (evaluate for Pocosins only)
CA Pocosin is the full extent (>:90%) of its natural landscape size.
C B Pocosin is < 90% of the full extent of its natural landscape size.
13. Connectivity to Other Natural Areas — landscape condition metric
13a. Check appropriate box(es) (a box may be checked in each column). Involves a GIS effort with field adjustment. This
evaluates whether the wetland is well connected (Well) and/or loosely connected (Loosely) to the landscape patch, the contiguous
metric naturally vegetated area and open water (if appropriate). Boundaries are formed by four -lane roads, regularly maintained utility
line corridors the width of a four -lane road or wider, urban landscapes, fields (pasture open and agriculture), or water > 300 feet wide.
Well Loosely
CA A >_ 500 acres
B B From 100 to < 500 acres
C C From 50 to < 100 acres
D D From 10 to < 50 acres
E E < 10 acres
F F Wetland type has a poor or no connection to other natural habitats
13b. Evaluate for marshes only.
Yes No Wetland type has a surface hydrology connection to open waters/stream or tidal wetlands.
14. Edge Effect — wetland type condition metric (skip for all marshes)
May involve a GIS effort with field adjustment. Estimate distance from wetland type boundary to artificial edges. Artificial edges include
non -forested areas >— 40 feet wide such as fields, development, roads, regularly maintained utility line corridors and clear -cuts.
Consider the eight main points of the compass.
A No artificial edge within 150 feet in all directions
B No artificial edge within 150 feet in four (4) to seven (7) directions
C An artificial edge occurs within 150 feet in more than four (4) directions or assessment area is clear-cut
15. Vegetative Composition - assessment area condition metric (skip for all marshes and Pine Flat)
EA Vegetation is close to reference condition in species present and their proportions. Lower strata composed of appropriate
species, with exotic plants absent or sparse within the assessment area.
E B Vegetation is different from reference condition in species diversity or proportions, but still largely composed of native species
characteristic of the wetland type. This may include communities of weedy native species that develop after clearcutting or
clearing. It also includes communities with exotics present, but not dominant, over a large portion of the expected strata.
E C Vegetation severely altered from reference in composition. Expected species are unnaturally absent (planted stands of non -
characteristic species or at least one stratum inappropriately composed of a single species). Exotic species are dominant in
at least one stratum.
16. Vegetative Diversity- assessment area condition metric (evaluate for Non -tidal Freshwater Marsh only)
EA Vegetation diversity is high and is composed primarily of native species (<10% cover of exotics).
B Vegetation diversity is low or has > 10% to 50% cover of exotics.
C Vegetation is dominated by exotic species (>50% cover of exotics).
17. Vegetative Structure - assessment area/wetland type condition metric
17a. Is vegetation present?
Yes No If Yes, continue to 17b. If No, skip to Metric 18.
17b. Evaluate percent coverage of assessment area vegetation for all marshes only. Skip to 17c for non -marsh wetlands.
L:A
>- 25%
coverage of vegetation
B
< 25%
coverage of vegetation
17c. Check a box in each column for each stratum. Evaluate this portion of the metric for non -marsh wetlands. Consider structure
in airspace
above the assessment area (AA) and the wetland type (WT) separately.
AA
WT
o.;A
E;A
Canopy closed, or nearly closed, with natural gaps associated with natural processes
@
B
L; B
Canopy present, but opened more than natural gaps
U
L]C
L;C
Canopy sparse or absent
?0-"0
L:A
A
Dense mid-story/sapling layer
ro
E B
B
Moderate density mid-story/sapling layer
L] C
C
Mid-story/sapling layer sparse or absent
L]A
A
Dense shrub layer
E
E; B
B
Moderate density shrub layer
L] C
C
Shrub layer sparse or absent
L]A
A
Dense herb layer
a�
L] B
B
Moderate density herb layer
_
E C
C
Herb layer sparse or absent
18. Snags - wetland type condition metric
A Large snags (more than one) are visible (> 12 -inches DBH, or large relative to species present and landscape stability).
B Not A
19. Diameter Class Distribution - wetland type condition metric
A Majority of canopy trees have stems > 6 inches in diameter at breast height (DBH); many large trees (> 12 inches DBH) are
present.
B Majority of canopy trees have stems between 6 and 12 inches DBH, few are > 12 -inch DBH.
C Majority of canopy trees are < 6 inches DBH or no trees.
20. Large Woody Debris - wetland type condition metric
Include both natural debris and man -placed natural debris.
A Large logs (more than one) are visible (> 12 inches in diameter, or large relative to species present and landscape stability).
B Not A
21. Vegetation/Open Water Dispersion - wetland type/open water condition metric (evaluate for Non -Tidal Freshwater
Marsh only)
Select the figure that best describes the amount of interspersion between vegetation and open water in the growing season. Patterned
areas indicate vegetated areas, while solid white areas indicate open water.
A B C D
L,.�
22. Hydrologic Connectivity - assessment area condition metric (evaluate for riparian wetlands only)
Examples of activities that may severely alter hydrologic connectivity include intensive
ditching, fill, sedimentation, channelization, diversion, man-made berms, beaver dams, and stream incision.
L:A Overbank and overland flow are not severely altered in the assessment area.
B Overbank flow is severely altered in the assessment area.
C Overland flow is severely altered in the assessment area.
D Both overbank and overland flow are severely altered in the assessment area.
NC WAM Wetland Rating Sheet
Accompanies User Manual Version 4.1
Rating Calculator Version 4.1
Wetland Site Name Amberleigh Shores Phase II Date 11/17/17
Wetland Type Basin - Isolated Assessor Name/Organization SEGi
Notes on Field Assessment Form (Y/N) NO
Presence of regulatory considerations (Y/N) NO
Wetland is intensively managed (Y/N) NO
Assessment area is located within 50 feet of a natural tributary or other open water (Y/N) NO
Assessment area is substantially altered by beaver (Y/N) NO
Assessment area experiences overbank flooding during normal rainfall conditions (Y/N) NO
Assessment area is on a coastal island (Y/N) NO
Sub -function Rating Summary
Function
Sub -function
Metrics
Rating
Hydrology
Surface Storage and Retention
Condition
NA
HIGH
Sub -Surface Storage and Retention
Condition
NA
Water Quality
Pathogen Change
Condition
NA
Conditon
MEDIUM
Condition/Opportunity
NA
Opportunity Presence? (Y/N)
NA
Particulate Change
Condition
NA
Condition/Opportunity
NA
Opportunity Presence? (Y/N)
NA
Soluble Change
Condition
NA
Condition/Opportunity
NA
Opportunity Presence? (Y/N)
NA
Physical Change
Condition
NA
Condition/Opportunity
NA
Opportunity Presence? (Y/N)
NA
Pollution Change
Condition
HIGH
Condition/Opportunity
HIGH
Opportunity Presence? (Y/N)
NO
Habitat
Physical Structure
Condition
HIGH
Landscape Patch Structure
Condition
LOW
Vegetation Composition
Condition
HIGH
Function Rating Summary
Function
Metrics/Notes
Rating
Hydrology
Condition
HIGH
Water Quality
Condition
HIGH
Condition/Opportunity
HIGH
Opportunity Presence? (Y/N)
NO
Habitat
Conditon
MEDIUM
Overall Wetland Rating HIGH
Project: Amberleigh Shores Phase II Pre -Construction Notification
Subject: Response to USACE 18 May 2018 Electronic Request for Additional Information
Date: 23 May 2018
Attachment 4
Alternate Site Plans
Pi
Amberleigh Shores Phase II
Original Site Plan
US HIGHWAY 17 - MARKET STREET Estimated Wetland Impact 0.895 Ac.
I j�T-
-
•-------------
L --------------------------------------
r Vii.-SSC f L� ,' %� •��_
} ` ,
w ./ t� .F -� - `� ��,,,• � •� � CSS 1
� I '
■ `'�ti Avoided
s I _,r .i � '� � t• .
�O/ 7c,
he
I 1
♦ r `
■ ,r / tl
m '
......... _
1
Distance:
100.61 ft
Amberleigh Shores II
Ragan Smith Associates
2/11/16 10059-0455 1 "=100'
T
N
Amberleigh Shores Phase 2
number of units
Impacts = -0.70 Acre
.f
1
1
1 1
1 1
1 f �
J-------------
-41-77-
--- _--
Amberleigh Shores Phase 2
alternate Site plan
�etland Impacts = -0.225 Acre
v
j �� !` -����J •,M ••,- }� ' I � . __
w
S -
Project: Amberleigh Shores Phase II Pre -Construction Notification
Subject: Response to USACE 18 May 2018 Electronic Request for Additional Information
Date: 23 May 2018
Site Plan with Retaining Wall Avoidance Calculations
10