20021259 Ver 1_Mitigation Bank Prospectus_20020601

PROSPECTUS
Deep Creek Wetland Mitigation Bank
American Wetlands
and
Soil & Environmental Consultants, PA
Deep Creek Wetland Mitigation Bank
Prospectus
A. Administrative Provisions
The Deep Creek Wetland Mitigation Bank is proposed as a Private-Commercial Bank,
which will be operated as a Debit Bank and will offer wetland impact credits, primarily for
wetland impacts by the North Carolina Department of Transportation in the upper Yadkin
River basin (Cataloging Unit # 03040101). There is opportunity for up to approximately
5400 linear feet of stream restoration on the site as well. The potential to develop the
stream restoration is currently under review. An easement is currently owned by American
Wetlands and Natural Resources Exchange Corporation (American Wetlands). The
wetland mitigation effort will involve approximately 42.4 acres within a larger tract of
about 70.5 acres.
Easement ownership will remain with American Wetlands during the minimum five-year
monitoring and maintenance period at which time the intent will be to transfer the
easement to an acceptable land conservancy organization.
Discussions and meetings have been conducted with a number of resource agencies, in the
process of developing this prospectus. Representatives from the US Army Corps of
Engineers have visited the site.
B. Technical Provisions
Location
The Deep Creek Mitigation Bank is located along Deep Creek, a tributary of the Yadkin
River in Forbush Township, Yadkin County, North Carolina. The property is located in
Sub-basin 02, Hydrologic Unit 22. This is the highest priority Sub-basin as assigned by the
North Carolina Wetlands Restoration Program and the second highest priority Hydrologic
Unit within the Sub-basin.
Land Use
The Deep Creek Mitigation Bank site consists of 70.745 acres. The land is currently in
cultivation with corn being produced on an annual basis. Hydric soils on the site exist in
one contiguous unit of 30.4 acres on the south portion of the site. Presently,
approximately 12 additional acres of wetland creation is proposed, resulting in about 42.4
total acres of wetlands. This will be finalized in the detailed mitigation plan.
These lands are classified as Prior Converted Wetlands, and this is supported by the
ditching system that is in place. The original classification of the site was very likely swamp
hardwood. These systems are more fully described in the vegetation section.
Geomorphic Position
The site occupies a broad flood plain and fluvial terrace position of about 730 feet in
elevation. Soil parent material is fine-textured alluvium deposited by the Deep Creek-
Yadkin River system. Elevation of the flood plain is about 2-4 feet above the base of the
small unnamed tributary which runs through the site. The proposed restoration area is
nearly level (sloping at less than 1.0% toward Deep Creek) with little topographic
variation.
Soil Characteristics
Soils on the site are described in the following inventory:
Wehadkee Series Poorly-drained, fine-loamy, mixed,
thermic, Typic Fluvaquent
Chewacla Series Somewhat poorly drained, fine-
loamy, mixed, thermic Fluvaquentic
Dystrochrept
The Wehadkee Series, a Hydric Soil, comprises about 30.4 acres of the site, and represents
the potential wetland restoration area. The Chewacla Series is adjacent to the Wehadkee
Series downstream and represents potential wetland creation area. Soils are more well
drained nearer to Deep Creek.
Site Hydrology
Drainage on the site is to the north toward Deep Creek. Runoff from approximately 0.9
square mile in one tributary and 1.4 square mile in another, converges on site. This runoff
and site precipitation provide input to surface and groundwater on-site. Two natural
tributaries drain toward the site from the ,south. These tributaries have been channelized
where they pass through the site toward Deep Creek, as part of agricultural site
development. The broad, flat area of Wehadkee soils has been ditched to facilitate
agricultural operations. The ditches are shallow and have partially filled-in, thus reducing
their effectiveness. Wetland hydrology can be effectively restored by filling the drainage
system and altering the flow of the channelized streams. Opportunity exists for up to 5400
linear feet of stream restoration within the proposed mitigation area.
A water budget will be developed for the site which will address inputs and outputs to and
from the system. Precipitation, surface water and ground water inputs will be analyzed
2
relative to outflows and evapotransporation, in order to develop a design which will ensure
appropriate wetland hydrology. Water depth, timing and duration of saturation and
inundation are critical aspects of any wetland and the design will respond to these
parameters.
The site will provide mitigation for impacts in Cataloging Unit #03040101 with the
possibilities of negotiating to mitigate impacts in the adjoining Cataloging Units.
Vegetation
The proposed mitigation portion of the site is dominantly agricultural fields, currently in
corn stubble from the previous season. The channels and ditches on site have tree and
shrub species along the banks. The open field portion is surrounded by bottomland
hardwood forest on the west and south. Typical canopy species include water oak, willow
oak, green ash, yellow-poplar, sycamore, red maple, elm, etc. Sub-canopy species include
maple, alder, willow, silky dogwood, etc.
Habitat
Existing site habitat is comprised of: (a) cover, nesting, and travel areas along ditches, (b)
some open land feeding area, and (c) the large adjacent areas of bottomland hardwood
forest.
Diversity on site is low and habitat is somewhat broken by the large open fields.
Development of a bottomland hardwood system in the open field areas would result in a
large contiguous swamp forest allowing greater connectivity to Deep Creek and habitat for
bottomland species. Examples of species which would benefit from a large swamp forest
system include; Raccoon, Gray Fox, White-tailed Deer, Bobcat, Wood Ducks, and Wild
Turkey.
Proposed Mitigation Types
The intent of the mitigation effort is to develop a Bottomland Hardwood Forest wetland.
This would be done by restoring wetland hydrology to the hydric soil areas, as well as
developing wetland hydrology in the near-hydric areas. The reference sites for this project
are a suite of three areas immediately adjacent to the mitigation area (see site map for
location). The reference areas are described below.
The following table lists the proposed mitigation components:
Restoration (2:1) 30.4 acres 15.2 credits
Creation (3:1) 12.0 acres 4.0 credits
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Enhancement (4:1) 0.0 acres 0.0 credits
Preservation (10:1) 0.0 acres 0.0 credits
TOTAL 42.4 acres 19.2 credits
The above table represents the proposed number of acres and credits available based on
preliminary data and field review. More detailed information will be developed in the
preparation of the Mitigation Plan, which may alter the number of creation acres involved.
Reference Site
The reference site for the project is a suite of three areas immediately adjacent to the
mitigation site (see accompanying map). The areas have been visited by the USACOE and
have been deemed to be acceptable pending approval by the MBRT. The reference areas
are similar in geomorphic position and soil type and represent the target vegetative
condition. Wetland hydrology is apparent in the reference areas and will be monitored
with three groundwater monitoring devices (one in each area) identical to those used
within the mitigation area (see device specifications included), which will continually
record (at least daily) and store data on water levels. Data from the groundwater wells will
be downloaded periodically and depths of saturation will be recorded during each
quarterly visit. Well data will be verified by observation of water levels in hand dug auger
holes at the time of data collection. This data will be presented, along with that from the
mitigation site, to the MBRT in the annual report.
Implementation Methods
Hydrology - Grading and Structural
Restoration of wetland hydrology to the hydric soil area of the site will be accomplished by
reversing the effect of the existing drainage system as well as altering flow in the existing
and/or restored channel. There is one outlet from the channel systems to Deep Creek.
That outlet would be blocked at the last confluence of channels from the site. Creation of
wetland hydrology within the near-hydric soils (Chewacla Series) will be accomplished
through construction of a compacted-soil trench with a slightly raised berm along the down
gradient portion of the wetland creation area to ensure detention both surface and
groundwater. Additionally, drainage dams will be constructed at appropriate intervals
along the drainage ditches to delete the effects of the ditch on the adjacent areas. Spacing
of these structures will be determined in the detailed design portion of the process. The
berm and drainage dams will consist of earth fill removed from the wetland creation
portions of the site. The fill will be placed in the ditch such that it is at the original
adjacent grade and will slope up and down gradient at appropriate stable dimensions.
4
In the better drained portions of the northern area of the site, creation of wetland
hydrology will be further ensured by removing a portion of the overlying aerobic soil such
that the layer where redoximorphic features indicate a seasonal high water table is within
12 inches of the surface.
There is potential to restore natural channel form and function to approximately 5400' of
stream by altering the dimension, pattern, and profile of the channel through the flood
plain portion of the site. The existing channelized portion of the streams will be
abandoned by sequentially blocking with earth fill. The new channels will have greater
length and sinuosity with a lower gradient and the cross-sectional area will replicate a
nearby reference reach.
Vegetation
The majority of the area of hydric soil will be planted with seedlings of bottomland
hardwood species. Areas where shallow inundation will occur will be planted with shrub
species and herbaceous material. The species list below describes proposed typical species.
Once structural development and grading are complete, planting will begin during the next
appropriate planting season for each type of vegetation (two-phased approach). Spring is
preferred for the herbaceous material, with fall as a second preference. For the shrub and
tree species, fall is preferred, with spring as an alternate.
Woody tree species will be planted on an 8 x 8-foot spacing. Woody shrub species will be
planted on a 6 x 6-foot spacing. Herbaceous species will be planted on a 3 x 3-foot
spacing or that area will be seeded with a wetland seed mix at 4 pounds per acre.
The following is a table of proposed species from which plant material will be selected:
Tree Species
Liriodendron tuli ifera Yellow-Poplar
Ulmus americana American Elm
Celtis laevigata Sugar-Berry
Fraxinus enns lvanica Green Ash
uercus hellos Willow Oak
Quercus ni ra Water Oak
Betula ni a River Birch
Platanus occidentalis Sycamore
Acer ne ndo Box-elder
Po ulus hetero h la Swam Cottonwood
Shrub Species
Rhododendren maximum Rhododendron
Ce halanthus occidentalis Buttonbush
Alnus serrulata Smooth Alder
5
Salix discolor Puss Willow
Cornus amomum Silky Dogwood
Asimina triloba Pawpaw
Salix sericea Silky Willow
Herbaceous Species
Carex s Sedges
uncus s p. Rushes
Osmunda cinnamomea Cinnamon Fern
Osmunda re alis Royal Fern
Other herbaceous species as available.
Success Criteria
The success of the vegetative component will be based on the survival of canopy tree
species at the end of the five-year monitoring period. Observation points for vegetative
monitoring (representative of community types) will be established during the development
of the mitigation plan. All monitoring will occur from these observation points throughout
the monitoring period as long as they continue to be representative of the community. Any
changes to the observation points will require the approval of the MBRT. Vegetative
success will be predicated on a minimum mean density of 260 stems per acre surviving
after five years, all of which will be from the target species list (planted or native), or as
approved by the MBRT. No single species shall comprise more than 20 % of the surviving
stems. By the end of the five-year monitoring period, vegetation in the proposed wetland
areas must meet the criteria for hydrophytic vegetation as described in the 1987 Corps of
Engineers Wetland Delineation Manual, specifically, more than 50% of the dominant
species in all strata are OBL, FACW, or FAC as listed in "National List of Plant Species that
Occur in Wetlands" -1988 USF&W. The status of site vegetation, relative to this criteria,
will be included in annual monitoring reports.
Phasing
It is most efficient to do all construction (structural and grading) in a single phase since all
outlets and ditches need to be blocked to effectively restore the entire area. Also, the
material needed for the filling of ditches and dam construction will be obtained from the
graded areas in the creation portion.
Each area of the site with common plant types should be planted in one operation so that
desired habitat type may be encouraged and invasive species are minimized. The planting
may be done in phases by plant types (e.g. Phase I -all woody material planted in late Fall
or Winter; Phase II - all herbaceous material planted in Spring).
6
Potential Scheduling (example)
Project Begins February, 2001
Detailed Site Survey (topography) Aril, 2001
Concept Plan and Prospectus June, 2001
Development of MBRT (preliminary) August, 2001
Site Meeting with Agencies August/Sept., 2001
Detailed Mitigation Plan October, 2001
Develop MBI November, 2001
Plan Approval b USCOE/NCDWQ January, 2002
Contractor Selection March, 2002
Construction Be ins* March 1, 2002
Grading and Structural Complete May 31, 2002
Install Monitoring Devices/Monitoring Begins August, 2002
Planting Begins (Phase I) December, 2002
Planting Complete (Phase II) May , 2003
Monitoring Phase 6/03 through 12/07
Construction Supervision will include:
1) Pre-construction/planting meeting with contractor.
2) Site supervision during installation.
3) Final inspection after all site work is complete, preparation of appropriate
completion of work statement, preparation of as-built report and plan, and
documentary photos and submission of that report to the MBRT for review
within 30 days of completion.
4) Flagging of the mitigation site limits in the field, delineating between different
treatment areas.
C. Operations Provisions
Service Area
The primary service area is the upper Yadkin River area (cataloging unit #03040101) with
the possibility of negotiating the mitigation of impacts in adjoining cataloging units. The
primary service area is in the northwestern Piedmont and foothills of North Carolina and
includes portions of municipalities such as Winston-Salem, Yadkinville, Mount Airy, and
North Wilkesboro, NC. Use of the bank for projects outside the primary service area may
be proposed and considered on a case-by-case basis.
7
Wetland Types (debit)
The bank will supply credits for impacts to Bottomland Hardwood Forest wetland types.
Wetland and stream impacts are common in this service area relative to road building, large
retail and industrial site development, and watershed/water supply development.
Credit Release
Release of wetland credits from the proposed bank will be according to the following
schedule:
Accomplishment
Mitigation Plan complete,
site secured, financial
assurances established,
and MBI signed
1st year success
2nd year success
3rd year success
4th year success
5th year success
MBRT final sign-off
Percentage (cumulative)
15
10 (25)
10 (35)
10 (45)
15 (60)
15 (75)
25 (100)
Following the five-year monitoring period, the MBRT will meet to discuss final
approval of the bank. The portion of the credit release schedule which is based on
the end of the first, second, etc. successful year begins after all initial
construction/restoration activities are complete. Some construction activities,
relative to site repair, may follow during the five-year monitoring period.
Release of credits from the stream restoration effort may precede those of the
wetland portion if it is determined that the stream is stable and functioning
appropriately.
Monitoring
The project site and reference sites will be monitored for a period of at least five years (or
until all success criteria are met) following initial construction of the project. This will
involve observation of two basic parameters in the wetland areas; 1) vegetation and 2)
hydrology.
Vegetative conditions will be evaluated relative to the number and type of living stems of
canopy tree species and the wetland occurrence status of all plant community strata at
8
standard sampling points within each restoration or creation unit. Vegetative success
criteria is described in the Implementation Methods - Vegetation section of this prospectus.
Site hydrology will be evaluated during site visits as well. Groundwater monitoring devices
will be installed throughout the restoration and proposed creation areas, as shown on the
accompanying map and approved by the USACOE, which will continually record (at least
daily) and store data on water levels. These will be capacitance-type instruments, the data
from which can be downloaded in the field (see example specifications sheet from Remote
Data Systems, Inc. included). Daily water level data can be determined and presented for
review. Any areas to be inundated, will be monitored with water depth indicators
(graduated poles). Data from the groundwater wells will be downloaded periodically and
depths of saturation and inundation will be recorded during each quarterly visit. Well data
will be verified by observation of water levels in hand dug auger holes at the time of data
collection. This data will be presented to the MBRT in the annual report.
Site visits will be conducted quarterly by a Professional Soil Scientist or Biologist. These
visits will be made at the end of each season (around March 1, June 1, September 1, and
December 1). An annual report of conditions will be made to the MBRT at the end of
each calendar year. This report will summarize observations from the quarterly visits.
Visits may occur more often as needed (e.g. following severe weather conditions, etc.).
Any damage or other site conditions which may jeopardize the long-term success of the
project will be addressed as observed during the monitoring period. The conditions will be
described, along with proposed solution, in a report to the MBRT as soon as possible.
The monitoring phase will begin at the start of site preparation, be carried out by the
contractor, continue for a minimum of five (5) years or until success criteria is met and will
include:
1) Preparation of as-built plans and report describing completed conditions and
any modifications or variances from the original mitigation plan. This
information will be prepared and submitted within 30 days of completion of
site construction/planting and will include a detailed topographic survey by a
Registered Land Surveyor, particularly in areas where grading or other
modification to the land surface has occurred.
2) Quarterly inspections of vegetation from standard observation points
including, early, mid, and late growing seasons. Site vegetation conditions
along with documentary photos, will be summarized in the formal report for
that calendar year (to be submitted within 30 days of the end of the year).
Should the mid growing season site inspection indicate conditions which need
to be corrected, this will be reported in a brief letter to the MBRT, along with
the suggested remediation. This will allow time to obtain plant material and
repair and re-plant the failed areas during that following winter or spring.
3) Quarterly inspections of the site to record elevation of inundation and
saturation. Each site visit will document hydrologic conditions, including
documentary photos. Data for each year will be submitted to the MBRT in
the annual formal report, within 30 days following each calendar year.
Should any significant change or damage occur on the site (e.g. as a result of
9
severe weather) during the year, this will be reported as soon as possible, in
order to develop a repair and restoration plan.
4) Monitoring present and future threats to the success of the plan, including any
degrading factors such as depredation, trespassing, vandalism, or plant removal
from destructive wildlife, domestic animals, and humans. If a potentially
project threatening problem is observed, a contingency plan to rectify the
problem will be submitted to the USACOE DWQ within 30 days of detection.
Contingency Planning
A contingency plan will be developed as part of the preparation of the Mitigation Banking
Instrument. Prior to release of credits, American Wetlands shall provide evidence of
financial assurances for completion of construction, monitoring, and reporting to the
USACOE. The financial assurance will be based on the cost of doing the mitigation work.
Such work includes, but is not limited to; maintenance of hydrology monitoring devices,
sediment and erosion control, grading, planting, undesirable species control, depredation
control, human impact control, as-built surveys, and five-year monitoring. Grading
estimates include a 20% re-grading contingency and the planting plan prescribes twice the
required density of species required to meet the performance standard for survival of
desired species. Should there be any additional needs for grading or planting, such needs
will provided for from the maintenance and monitoring funds being held by NCDOT.
Work already complete includes; purchase of easement, boundary survey, topographic
survey, purchase of monitoring devices, Phase I Environmental Site Analysis,
Archaeological and Architectural review, Threatened and Endangered Species field surveys
and file research, and preliminary grading and planting plans.
Financial Guarantees
1. American Wetlands has provided NCDOT, and executed, a Promissory Note and
an executed and recorded first lien Deed of Trust on the property in the amount of
Five Hundred and Nineteen Thousand and Three Hundred and no/100 Dollars
($519,300.00). The Deed of Trust was recorded upon the closing of the purchase
of the easement on June 1, 2001.
2. Construction and Payment Bonds in the amount of Two Hundred and Seventy
Eight Thousand Eight Hundred and no/100 Dollars ($278,800.00) have been
secured to cover the grading and planting costs, which have been estimated to be
significantly less than this amount.
3. American Wetlands will require grading and planting contractors to provide
additional performance and payment bonds in the amount of the actual costs of
performing such work. This requirement of sub-contractors is required by
American Wetlands' bonding company.
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-P Rock Vane Grade-Control Structures
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db 98, pg. 71
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db 79, pg. 212
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Illustrative Plan Scale: 1" = 400'
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Monitoring Well Locations Scale: 1" = 400'
0,47
4,; } Deep Creek Mitigation Bank
?; : American Wetlands & Soil and Environmental Consultants, PA
Capacitance Water Level Series
• Ranges: 0-20",°.040", and 0-80"
• Detachable Probe
• Battery powered
• Easy to use Windows® 95 / 98 Software
• User Software includes battery level indicator
• 8,192 time and date stamped measurements
• Screen and batteries included

Performance & Specifications
• Accuracy 0.125" (3 mm)
Resolution 0.1" (2,5mm)
Temperature range of 20OF to 120°F
Measurement interval; one minute to 24 hours
Communications through RS 232 interface cable
Non-volatile Flash memory
12 mA active, 2.5 mA in sleep mode
Operates on 4 "C" Cell Industrial Batteries
• Tested and Certified FCC Part 15 compliant
Who do you call?
John Lacer
Terra Vista, Inc.
P.O. Box 178
Currie, NC 28435
[phone] Voice & FAX - email: lacer]@bellsouth.net
Or visit www.rdsys.com
02000 Remote Data Systems, Inc - Whiteville, North Carolina LISA
Functional Description
The Ecotone TM capacitance water level monitoring, instrument is ideally suited for measuring and
logging shallow water level fluctuations for extended periods of time. Applications include:
• Agricultural Irrigation / Drainage Response
• Estuarine Studies
• Forest Hydrology Studies
• Hydrology Research
• Mean High Water Documentation
• Mitigation Bank Monitoring
• Retention Pond Monitoring
• Riparian and Wetland Restoration
• Seasonal High Groundwater Determinations
• Soil Suitability Studies
• Spray Nitrification Field Groundwater Data
• Storm Water Runoff
• Stream Level / Tidal Data / Flood Data
• Wetland Delineation
• Wetland Hydrology Determinations
• Wetland Mitigation Assessment
The powerful Ecotone TM data logger is combined with our rugged capacitance sensor and records 8,192
time and date stamped measurements. The large memory capacity allows data points to be recorded at
intervals not previously possible. For example, water level readings every:
• 1 hour for 341 days • 15 minutes for 85 days • 1 minute for 5.6 days
Typically, the logger is connected to a PC for setup and downloading using our custom Windows
95/980 software. Data is stored in nonvolatile memory so in the unlikely event of battery failure, your
data is available after new batteries are installed. Data is downloaded in text format for use with your
favorite spreadsheets programs (i.e. Lotus, Excel, Works, and many other popular software packages).
After downloading, a preview window feature provides the user with an instant check on the existing
data set without opening other programs. In addition, a custom 32-character user message is downloaded
with each data set for sample site identification and a battery life/change indicator lets you know when
it's time to change the batteries. DATA Sensor Capacity Probe Length Diameter
Screen
CP 08 40 15
CP = 08 = 8k 20 = 20 inches 15 = 1.5 inches
Capacitance readings 40 = 40 inches 20 = 2.0 inches
Probe 80 = 80 inches 30 = 3.0 inches
Example: CP084015 = Ecotone TM with 8k DATA
points, 40 inch measurement range, & 1 '/2 inch
diameter screen.
02000 Remote Data Systems, Inc - Whiteville, North Carolina USA

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