HomeMy WebLinkAbout20052255 Ver 1_Emails_20060919wuuu ivtvuutaui t aua
Subject: FW: Round Mountain Falls
From: "Rebekah Newton" <rebekah@wetland-consultants.com>
Date: Tue, 19 Sep 2006 14:10:44 -0400
To: <ian.mcmillan@ncmail.nev
-----Original Message-----
From: Rebekah Newton [mailto:rebekah~wetland-consultants.com]
Sent: Tuesday, September 19, 2006 1:51 PM
To: 'ian.mcmillain@ncmail.net'
Subject: Round Mountain Falls
Ian,
Please reference DWQ Project # 05-2255.
I took Kevin Barnett out to Round Mountain Falls last week to review the
stream calls on site. To avoid an additional "add info" letter, he
recommended that I send you some information regarding our potential
response to the August 17, 2006 letter. The attached information should
address the three concerns outlined in your letter.
Z would like to know if you feel like this information will be
sufficient enough for the Raleigh Office to issue the 401 permit. If
so, I will package this information and mail it to yau, if not, I would
like to speak with you regarding any lacking information. Please
contact me via email or phone should you have any questions.
Thank you.
Rebekah L. Newton
Wetland and Natural Resource Consultants
Post Office Box 862
Canton, North Carolina 28716
828-713-1930
~i Content-Type: application/pdf
;Round Mountain Restoration Map 09.19.06.pdf
Content-Encoding: base64
.Content-Type: application/msword
.Round Mountain Crass Sections 09.19.06.doc
Content-Encoding: base64
Round Mountain Impacts Table 09.19.06.x1s'; Content-Type: application/vnd.ms-excel
Convent-Encoding: base64
Round Mountain PDP Data 09.19.06.x1s Content-Type: application/vnd.ms-excel
Content-Encoding: base64
;';.Round Mountain Restoration - Mitigation Plan 09.19A6.doc Content-Type: application/msword
Simplied Impact Table
Round Mountain Channel Impact Summary Sheet For Phases 2-4
Road Crossin # Existin Im act Pro osed Im act New Im act
linear feet linear feet linear feet
A erennial channel 0 20 20
B intermittent channel 0 20 20
I erennial channel 0 20 20
Phas e 2
C erennial channel 0 20 20
H erennial channel 0 20 20
24 erennial channel 0 36 36
26 erennial channel 0 36 36
27 erennial channel 20 36 16
28 intermittent channel 0 36 36
31 erennial channel 0 36 36
32 erennial channel 0 36 36
33 erennial channel 0 30 30
34 erennial channel 0 30 30
Phase 3
35 erennial channel 0 30 30
36 erennial channel 0 36 36
37 erennial channel 0 36 36
38 intermittent channel 0 36 36
39 intermittent channel 0 36 36
40 erennial channel 0 36 36
41 intermittent channel 20 36 16
Phase 4
42 intermittent channel 20 36 16
43 erennial channel 20 36 16
46 erennial channel 0 30 30
TOTALS INTERMITTENT 40
TOTALS PERENNIAL 40
TOTAL ALL CHANNELS 80
200 160
524 484
724 644
Mitigation for All Impacts in All Phases
Stream T e and Miti ation Form Len th Miti ated for: Miti ation Ratio Total
1 Perennial, Restoration 305 1:1 305
2 Perennial, Preservation 255 80:1 20400
3 Intermittent, Preservation 233 10:1 2330
793 23035
Round Mountain Falls
Restoration -Mitigation Plan
Transylvania County, North Carolina
September 19, 2006
Prepared by:
PO Box 882
Canton, NC 28716
Executive Summary
The developer of Round Mountain Falls, McKeough Land Company, Inc., proposes this
mitigation plan to restore approximately 305 linear feet of channel up- and downstream of
existing road crossings and preserve approximately 23,035 linear feet of stream channel.
The plan, ns outlined within this document, serves as guidance for the proposed mitigation.
RESTORATION
Restoration will be:
• removal of fill dirt associated with the rood crossing
• removal of pipes, rip-rap, logs or other crossing structures
• creation of aquatic habitat using rock
• stabilization of stream bank with fine grading
• installation of topsoil
• temporary seeding to aid in stabilization
• planting of stream banks and riparian buffers with permanent vegetation
Project oversight will be provided by WNR staff to ensure proper techniques and success;
and to propose modifications during the construction process, if necessary. Restoration
success will be measured in terms of stream aquatic life and stream buffer plant survival.
Construction Plnn and Specifications
The restoration process will begin with the removal of fill dirt used in the road crossing.
Then the pipe, rip rap, and any other stream implements will be removed. All attempts will be
made to recreate the channel, stream bank slopes, and angles to the condition they were on
the site prior to disturbance. Because all of the sections of channel proposed for restoration
are at old road crossings, they have been straightened. Sinuosity will be added to the
channel such that the restored channel will be 1.2 times its original length within the some
straight line distance.
At this point we will begin to harvest on site materials to be used in the restoration process.
Materials such as topsoil, vegetation, and rock will be harvested on site during other
construction activities from areas of similar slope and aspect.
Once the stream is restored, focus will move on to the stream banks. Topsoil harvested on
site will be added to the stream banks at a minimum depth of six inches. No soil amendments
(fertilizer) will be added in order to keep the system as natural as possible and to prevent
any excess nutrient runoff into the stream. Fine grading will be used when necessary to
recreate side slopes and micro-topography will be used for soil stabilization and to minimize
runoff.
Planting Plnn and Specifications
The stapes will be planted with appropriate riparian species from an approved list
(Attachment D) to recreate the natural buffers which occur on site. Rosebay Rhododendron
will be planted densely along the stream channel to provide shade, woody debris, and to mimic
the natural system present on site. Rosebay Rhododendron and Dog-Hobble will be planted at
a dense ratio toward the outer edge of the stream buffer to minimize re-colonization by
invasiv~z exotic species and mimic natural conditions on the site.
In the rest of the area, trees and shrubs will be mixed and the planting arrangement will be
on 10 ~; 10 foot spacing, which will result in 436 stems per acre. Tree shelters may be used
to accelerate growth and increase survivability.
All permanent vegetation will be harvested on site to ensure they are suitable native species.
During other construction, vegetation from similar slope and aspect will be harvested. This
vegetation will be properly excavated and prepared for transport in order to minimize damage
and ensure survivability. These plants will then be planted in the riparian buffer zone. This
procedure will occur this spring before the sap begins to rise, in order to reduce transplant
mortality. The contractor will assure percolation of all planting beds/pits prior to
installation. Large trees will be anchored into the ground ns necessary.
The objective will be to mimic most of the natural buffer that is on site, which is mainly
composed of shrubs and trees. However, warm season grasses will be used, in accordance
with the "Warm Season brass Establishment and Management in North Carolina and Virginia"
providc;d by the US Fish and Wildlife Service as a temporary planting to aid with soil
stabili;:ation.
Plant Material Specifications
Bare Root or Container (Herbaceous):
The plants will either be ordered as bare root or in 1-quart containers. Plants will be planted
immediately upon delivery. Plants will be stored in shade and kept moist otherwise. Once
planted, the specimens shall appear healthy with no leaf spots, leaf damage, leaf
discoloration, chlorosis, leaf wilting or curling, or evidence of insects on leaves or stems.
Balled and Bagged (Woody Plants):
The size of the earthen ball shall at least meet the minimum requirements in the American
Standard for Nursery Stock (1980). Where plants are to be planted in saturated soils, the
bagged root ball shall have a surface diameter that is at least z of the diameter of the un-
pruned drip-line and a depth that is at least 8" per 5' of tree/shrub height. The hole for the
tree/shrub will be the rootball diameter plus 12" around the outer edge. The crown of the
rootball will be placed 1" above finish grade.
Plants will be planted immediately upon delivery. If this does not occur, plants shall be stored
in shade and root balls kept moist through periodic watering until the time of planting. Once
growing, the plants shall appear healthy with no leaf spots, leaf damage, leaf discoloration,
chlorosis, leaf wilting or curling, or evidence of insects on leaves.
Container (Woody Plants):
The soil within the root ball shall be field capacity (1/3 atmosphere) or wetter upon delivery
to the job site. Any wilted, dry and/or lightweight plants shall be rejected. Plants shall be
planted immediately upon delivery. If not then they must be stored in shade and root balls
kept moist through periodic watering until time of planting.
The shrub species will be either 2' to 3' or 3' to 4' in height. The tree species will be 7'
minimum for the Willow and Sycamores. Soil and root mosses must at least meet the
minimum required container size. If soil/root masses are substantially smaller, soil around
the root mass is loose, indicating the plant has not been in the container long enough to root
itself, it shall be rejected.
If growing, plants shall appear healthy with no leaf spots, leaf damage, leaf discoloration,
chlorosis, leaf wilting or curling, or evidence of insects on leaves.
For trees and shrubs, where spiraling woody roots exist on the outside of the soil/root mass
upon the removal of plants from the containers, the landscape contractor shall separate
(cutting where necessary) and spread them out prior to planting.
Planting Specifications
All areas between shrubs/trees will receive 3" of mulch. The contractor will assure
percolation of all planting beds/pits prior to installation. Large trees will be anchored into
the ground with a'Duckbill' Model No. 88-DTS-O earth anchors or approved equal. Evergreen
trees will be anchored with three 2"x2"x8' evenly spaced stakes and tied with recycled tire
tree ties as manufactured by Grostrait or approved equal to promote n straight growth
pattern and prevent wind impacts.
Fertilization
Woody Vegetation:
Fall/Winter plantings-Use Osmocote 18-5-11, twelve to fourteen month release fertilizer, to
be placed in hole or in soil fill/amendment mix at planting. Use grams (1 ounce) per 1-quart
container, 90 grams (3 ounce) per 1-gallon container (30 grams per each additional gallon).
Use 15 grams (1 ounce) per un-rooted cutting for willow whips (if used).
Soil Amendments:
Soil amendments are required around tree and shrub plantings. The amendments used should
be leaf or pine bark compost nt rates of one part compost to one part soil (from planting
hole). Fertilizer should be mixed in with soil amendment mix. No surface mulch is required
where plants are planted at or near original grade, unless tree shelters are used to promote
growth and survival percentage. A 6" soil berm will be constructed 12" from the outer edge
of the rootball to hold water.
Monitoring
Upon completion of construction, WNR staff will provide the resource agencies with photos
of each site and a baseline monitoring report. A monitoring report with photos will be
submitted annually for 5 years. Success will be measured in terms of plant survivability and
utilization of the area by terrestrial and aquatic species.
Timetable for Restoration
The stream restoration project will likely begin this summer. Once the infrastructure within
the areas proposed for restoration has been completed, the restoration work will begin. The
following timetable is presented for restoration work once the road removal is complete.
Ranges are given below to allow for rain days and other unexpected delays.
• 1 week to remove exitsing impacts and open channels
o Remove road fill, culverts, riprnp, etc...
o Flow will be in channel bed once the impacts are removed
• 1 week to restore stream channels
o mimic surrounding pattern, dimension, and profile
o including placement of rocks and woody debris
• 1 week to restore the stream banks to original condition
• 2 weeks to install the vegetation
Depending on weather conditions, the restoration work can be completed within one month.
Photographs will be taken and forwarded to the Army Corps and NC DWQ offices once all
restoration work is completed. Please contact WNR staff to accompany you and to schedule a
site inspection if desired.
PRESERVATION
Preservation nt a ratio of 10:1 and 80:1 will occur for all remaining intermittent and perennial
stream impacts, respectively, totaling approximately 23,035 linear feet. These areas will be
contained within the "Declaration of Easements, Covenants, Conditions, and Restrictions for
the Plot of Round Mountain Falls" to be protected in perpetuity. There are approximately
89,500 linear feet of streams located within the Round Mountain Falls property boundary.
Only those areas accounted for in the permit application, totaling 793 linear feet, will be
impacted; approximately 88,700 linear feet of stream will remain un-impacted. Lots in Phase
1 have already been sold; therefore, they have not been included within the easement legal
description. However; all streams in Phases 1 are required to have a minimum 25-foot trout
buffer which has been indicated on all plans.
Recommended Native Species for Stream Restoration
Trees
Yellow Buckeye
Sweet Birch
River Birch
Bitternut Hickory
Shagbark Hickory
Persimmon
Green Ash
Carolina Silverbell
Blackgum
Sycamore
Black Cherry
Black Willow
White Basswood
Small Trees and Shrubs
Tag Alder
Serviceberry
Red Chokeberry
Common Pawpaw
Sweet-shrub
Ironwood
Alternate Leaf Dogwood
Silky Dogwood
Hazel-nut
Witch Hazel
Winter Berry
Doghobble
Spicebush
Male-berry
Umbrella Tree
Ninebark
Wild Azalea
Swamp Azalea
Swamp Rose
Silky Willow
Meadowsweet
Sweet Leaf
W ithe-rod
Yellow-root
Herbaceous
Jack-in-the-Pulpit
Swamp Milkweed
Fringed Sedge
Bladder Sedge
Hop Sedge
Aesculus octandra
Betula lenta
Betula nigra
Carya cordiformis
Carya ovata
Diospyros virginiana
Fraxinus pennsylvanica
Halesia caroliniana
Nyssa sylvatica
Platanus occidentalis
Prunus serotina
Salix nigra
Tilia heterphylla
Alnus serrulata
Amelanchier arbrea
Aroma arbutifolia
Asimina triboba
Calycanthus tloridus
Carpinus caroliniana
Corpus alternifolia
Corpus amomum
Corylus Americana
Hamamelis virginiana
Ilex verticillata
Leucothoe axillaries
Lindera benzoin
Lyonia ligustrina
Magnolia tripetala
Physocarpus opulifolius
Rhododendron periclymenoides
Rhododendron viscosum
Rosa palustris
Salix sericea
Spirea latifolia
Symplocos tinctoria
Viburnum cassinoides
Xanthorhiza simplicissima
Arisaema triphyllum
Asc%pias incarnate
Carex crinata
Carex intumescens
Carex lupulina
Herbaceous [con't~
Lurid Sedge Carex lurida
Broom Sedge Carex scoparia
Tussock Sedge Carex stricta
Fox Sedge Carex vulpinoides
Turtlehead Che%ne g/abra
Umbrella Sedge Cyperus strigosus
Bottlebrush Grass E/ymus hystrix
Joe-Pye Weed Eupatorium fistulosum
Boneset Eupatorium pen`oliatum
Jewelweed Impatiens capensis
Soft Rush Juncus effuses
Rice Cutgrass Leersia oryzoides
Cardinal Flower Lobe/ia carding/is
Great Blue Lobelia Lobe/ia siphi/itica
Seedbox Ludwigia a/ternifolia
Switchgrass Panicum virgatum
Tearthumb Polygonum sagittatum
Green Bulrush Scirpus atrovirens
Woolgrass Scirpus cyperinus
Soft Stem Bulrush Scirpus va/idus
Bur-reed Sparganium americanum
March Fern Theypteris palustris
River Oats Uniola /atifolia
Ironweed ~ernonia noveboracensis
Potential Sources For Plant Material
Herbaceous Material:
Niche Gardens
I I I I Dawson Road
Chapel Hill, NC 275 16 (9 19) 23 I -6161
We-Du Nurseries
Rt. 5, Box 724
Marion, NC 28752 (828) 738-8300
Shrub Material:
Campbell's Nursery Carlton Campbell
2816 Campbell Road
Raleigh, NC 27606 (9 19) 85 I - 1162
Cure Nursery Bill or Jennifer Cure
880 Buteo Road
Pittsboro, NC 27312 (919) 542-6186
Fern Valley Farms Tom Clarke
1624 Fern Valley Farm Road
Yadkinville, NC 27055 (910) 463-2412
Tree Material:
NC Division of Forest Resources
Edwards Nursery
701 Sanford Drive
Morganton, NC 28655 (828) 438-6270
Tree Shelters:
Treessentials Company
2371 Waters Drive
Mendota Heights, MN 55120-I 163 800-248-8239
Tire Tree Ties:
Grostrait (707) 745-4330
Dimensions
Site De th at Thalwe in Water Surface in OHW in Bankfull in)
w d w d w d
1 1 25 1 32 4 43 8
2 2 18 2 18 2 40 24
3 1 27 1 37 6 43 10
4 1.25 24 1.25 30.5 4 44 11
5 1.5 20 1.5 24 3 32 5
6 2 36 2 48 6 72 12
7 1 18 1 24 3 36 6
w =width
d =depth
Site #1 Site # 2 Site #3 Site #4
x y x y x y x y
Bkf L 0 8 0 24 0 10 0 11
OHW L 5.5 4 11 2 2 6 6.75 4
WS L 9 1 11 2 8 1 10 1.25
TH 21.5 0 20 0 21.5 0 22 0
WS R 34 1 29 2 35 1 34 1.25
OHW R 37.5 4 29 2 40 6 37.25 4
Bkf R 43 8 40 24 43 10 44 11
Site #5 Site # 6 Site #7
x y x y x y x=Horizontal Position
Bkf L 0 5 0 12 0 6 Bkf L=location of ban
OHW L 4 3 12 6 6 3 OHW L=location of of
WS L 6 1.5 18 2 9 1 WS L=location of wat
TH 16 0 36 0 18 0 TH =location of thalwe
WS R 26 1.5 54 2 27 1 WS R =location of wa
OHW R 28 3 60 6 30 3 OHW R=location of o
Bkf R 32 5 72 12 36 6 Bkf R =location of bar
SLOPE
Site # Distance (If) Height (in) Height (in) ~ H (in) Slope
(u stream downstream
1 20 40 50 10 4.2%
2 25 40 93 53 17.7%
3 25 40 53 13 4.3%
4 25 40 43 3 1.0%
5 26 40 61 21 6.7%
6 25 40 49 9 3.0%
7 25 40 48 8 2.7%
(in); y =Depth (in)
dull on left bank
Binary high water on left bank
er surface on left bank
er surface on right bank
rdinary high water on right bank
kfull on right bank
Stream Cross Section #1
s
a
s
c 5
L
6
d
O 4
3
2
1
0
0
Stream Cross Section #2
30
25
20
c
t 15
a
d
O
10
5
0
5 10 15 20 25 30 35 40 45 50
Horizontal Position (in)
5 10 15 20 25 30 35 40 45
Horizontal Position (in)
Stream Cross Section #3
1z
10
8
c
L 6
d
d
4
2
()
0
Stream Cross Section #d
12
t0
8
c
L 6
a
d
4
2
0
0
5 10 15 20 25 30 35 40 45 50
Horizontal Position (in)
5 10 15 20 25 30 35 40 45 50
Horizontal Position (in)
Stream Cross Section #5
s
5
4
c
r 3
a
d
0
2
1
Stream Cross Section #6
1a
12
10
8
L
a
m
O 6
0
0
0 5 10 15 20 25 30 35
Horizontal Position (in)
10 20 30 40 50 60 70 80
Horizontal Position (in)
Stream Cross Section #7
7
6
5
~., 4
c
t
n
m
~ 3
2
1
0
Reference Reach for #2, 6, 7
7
6
5
,,., 4
c
L
c.
d
~ 3
2
1
5 10 15 20 25 30 35 40
Horizontal Position (in)
0
0 10 20 30 40 50 60
Horizontal Position (in)
Reference Reach for Site #1, 3, 4, 5
c 5
L
a
d
O 4
Horizontal Position (in)
0 10 20 30 40 50 60