20130412 Ver 1_Public Notice_20140313

Dennison, Laurie
From: Harrington, Dorothy SAW < Dorothy .Harrington @usace.army.mil>
Sent: Thursday, March 13, 2014 11:59 AM
To: Brown, Thomas L SAW
Cc: Collins, Jocelyn G SAW; Porter, Elizabeth D SAW
Subject: US Army Corps of Engineers Public Notice
As you requested, you are hereby notified that Wilmington District, United States Army Corps of Engineers has
issued a Public Notice. The text of this document can be found on the Public Notices portion of the Regulatory
Division Home Page. Each Public Notice is available in ADOBE ACROBAT (.pdf) format for viewing,
printing or download at http: / /www.saw.usace.army.miI /Missions /Re ug_latoryPermitPro ram.aspx.
The current notice involves:
Corps Action ID #: 2013 -00753
Issue Date: 12 March 2014
Applicant: 130 of Chatham, LLC
Project Name: Hoosier Dam
Expiration Date: 11 April 2014
Point of Contact: Thomas Brown
The Raleigh Regulatory Field Office, Corps of Engineers (Corps) has received an Prospectus from 130 of
Chatham, LLC seeking Department of the Army authorization for project Hoosier Dam.
The proposed bank site is located along NC Highway 87, approximately 6 miles south of Pittsboro, Chatham
County, North Carolina. The approximate geographic coordinates are 35.800228° north latitude and - 77.53935°
west longitude. It is located along the Rocky River, approximately 5.5 miles upstream of its confluence with the
Deep River, in the Cape Fear River Basin,
This email was sent out as a result of subscribing to the Wilmington District regulatory program public
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MAR 1 3 2014

® PUBLIC NOTICE
Issue Date March 12, 2014
Comment Deadline April 11, 2014
Corps Action ID SAW- 2013 -00753
The District Engineer has received a prospectus describing the establishment of a
compensatory umbrella mitigation bank to offset future state and federal permits Also received
is a mitigation plan for the first site, Hoosier Dam, proposed for inclusion into the bank
Bank Sponsor
130 of Chatham, LLC
3409 Birk Bluff Court
Cary, North Carolina 27518
This public notice does not imply, on the parts of the U S Army Corps of Engineers (Corps)
or other agencies, either favorable or unfavorable opinion of the work to be performed, but it is
issued to solicit comments regarding the factors on which final decisions will be based
LOCATION OF THE PROPOSED WORK The proposed bank site is located along NC
Highway 87, approximately 6 miles south of Pittsboro, Chatham County, North Carolina The
approximate geographic coordinates are 35 800228° north latitude and -77 53935° west
longitude It is located along the Rocky River, approximately 5 5 miles upstream of its
confluence with the Deep River, in the Cape Fear River Basin, Hydrologic Unit Code (HUC)
03030003
PROPOSED WORK AND PURPOSE The Sponsor proposes to remove Hoosier Dam and a
remnant rock dam, located within the impoundment of Hoosier Dam, to restore upstream
ecosystems within the Rocky River A monitoring program will be implemented for at least
seven years following the dam's removal to evaluate whether the Bank's goals and objectives are
met The Sponsor states that the ecological objectives of the dam removal are to 1) improve
local water quality, 2) restore appropriate flow regime and aquatic community, 3) restore habitat
for federally protected aquatic species; 4) restore passage for aquatic species, 5) preservation and
restoration of wooded buffers, and 6) benefits downstream water bodies

GEOGRAPHIC SERVICE AREA The proposed Primary Geographic Service Area for this bank
includes the Bank's native 8 -digit hydrological unit code (HUC) 03030003 The Sponsor has
also proposed a Secondary Geographic Service Area, which includes a portion of the adjacent
HUC, 03030004, within the Cape Fear River basin
PROSPECTUS The full prospectus and mitigation plan is available for review at
httn Hwww saw usace armv mil /WETLANDS/Notices /Current notices html
This umbrella mitigation bank may be considered one of a number of practicable alternatives
available to applicants to compensate for unavoidable stream impacts associated with permits
issued under the authority of Sections 404 and 401 of the Clean Water Act for projects located
within the prescribed geographic service area.
Oversight of this stream mitigation bank will be by a group of federal and state agency
representatives collectively referred to as the Interagency Review Team (IRT) The IRT shall be
chaired by the Wilmington District, U S Army Corps of Engineers and is comprised of
representatives from the U S Environmental Protection Agency, U S Fish and Wildlife Service,
N C Division of Water Quality, and the N C Wildlife Resources Commission
The actual approval of the use of this mitigation bank for a specific project is the decision of
the Corps pursuant to Section 404 of the Clean Water Act The Corps provides no guarantee that
any particular individual or general permit will be granted authorization to use this stream
compensatory mitigation bank to compensate for unavoidable stream impacts associated with a
proposed permit, even though mitigation from this bank may be available
AUTHORITY This public notice is required pursuant to 33 CFR Part 332, Compensatory
Mitigation for Losses of Aquatic Resources
FEDERAL EVALUATION OF PROPOSAL The Corps is soliciting comments from the public,
federal, state, and local agencies and officials, Indian Tribes, and other interested parties in order
to consider and evaluate this proposed mitigation bank Any comments received will be
considered by the Corps in evaluating this proposal Comments are used to assess impacts on
endangered species, historic properties, conservation, economics, aesthetics, general
environmental concerns, wetlands, cultural values, fish and wildlife values, flood hazards and
flood plain values (in accordance with Executive Order 11988), land use, navigation, shore
erosion and accretion, recreation, water supply and conservation, water quality, energy needs,
safety, food and fiber production, mineral needs, considerations of property ownership, and in
general, the needs and welfare of the people

Preliminary review indicates that
1 An environmental impact statement (EIS) will not be required
2 There are species of fish, wildlife, or plant (or their critical habitat) listed as endangered or
threatened under the Endangered Species Act of 1973 (PL 93 -205) that may be affected We will
coordinate with the US Fish and Wildlife Service to determine the impacts upon the listed
species within the area These species include Cape Fear shiner (Notropis mekistocholas), Red -
Cockaded woodpecker (Picoides borealis), American chaffseed (Schwalbea amaercana) and
Michaux's sumac (Rhus michauxu)
3 A preliminary search of the North Carolina State Historic Preservation Office indicated
that there are no known National Register Properties or previous archaeological survey sites
within the Bank site It is anticipated that a Phase I Cultural Survey may be required to ensure no
impact to cultural or historic recourses
Additional information may change any of these preliminary findings
Written comments pertinent to the proposed work, as outlined above, will be received in this
office, Wilmington District, Corps of Engineers, Attention Mr Thomas Brown, Raleigh
Regulatory Field Office, 3331 Heritage Trade Drive, Suite 105, Wake Forest, North Carolina
27587, until 5 00 p m , April 12, 2014

Hoosier Dares Mitigation Bank
Chatham, County, NC
Prospectus
13 - b"k � �-
iV �'
FEB 1 1 2014
RALEIGH REGULATORY
FIELD OFFICE
February 2014
W�.*
WILDLANDS
E III GIN F.£RI N
Prepared by:
Wildlands Engineering, Inc.
1430 S Mint St, Suite 104
Charlotte, NC 28203
Phone: 704 - 332 -7754
Fax: 704 - 332 -3306
Bank Sponsor:
130 of Chatham, LLC
3409 Birk Bluff Court
Cary, NC 27518
Phone: [phone]
Fax: 828 - 707 -9413

Hoosier Dam Mitigation Bank
Prospectus
TABLE OF CONTENTS
10 Mitigation Bank Introduction and Objectives
i i Introduction
12 Bank Location
13 Bank Objectives
:14 Qualifications of Bank Sponsor
20 Establishment and Operation of Mitigation Bank
2 1 Ownership Agreements and Long -term Strategy
2 2 Assurance of Sufficient Water Rights
23 Proposed Service Area
24 Need and Feasibility of Mitigation Bank
24 1 Need
2 4 2 Feasibility
30 Ecological Suitability of Site
3 1 Bank Site Characterization
32 Baseline Site Conditions
3 23. Existing Streams
3 22 Wetlands
3 23 Soils
3 2 5 Water Quality
3 2 6 Sediment.
3 27 FERC License
3 28 Threatened and Endangered Species
3 29 Cultural Resources
4 0 Mitigation Work Plan
50 Determination of Mitigation Credits
60 Maintenance and Long -term Sustainability
61 Maintenance
62 Long Term Management Provisions
70 References
1
1
2
2
3
4
4
4
4
5
5
6
7
7
8
8
8
8
9
13
13
13
14
14
15
17
17
17
18

APPENDIX
Landowner Authorization Form
FIGURES
Figure i
Vicinity Map
Figure z
Location Map
Figure 3
Service Area Map
Figure 4
Aerial Photograph
Figure 5
Conceptual Map
Figure 5a
Conceptual Map —
Lower Rocky River and Tributary 6
Figure 5b
Conceptual Map —
Middle Rocky River and Tributary 5
Figure 5c
Conceptual Map —
Middle Rocky River and Tributaries i through 4
Figure 5d
Conceptual Map —
Upper Rocky River
Figure 6
Soils Map
APPENDIX
Landowner Authorization Form

Hoosier Dam Umbrella Mitigation Bank
Prospectus
The Bank Sponsor, 230 of Chatham, LLC, proposes to establish the Hoosier Dam Umbrella Mitigation
Bank (Bank) to provide compensatory stream mitigation credits to offset unavoidable impacts to
jurisdictional streams authorized under Sections 4oi and 404 of the Clean Water Act and Section 20 of
the Rivers and Harbor Act The proposed Bank site is located on the Rocky River in Chatham County
approximately 51/2 miles upstream of its confluence with the Deep River in Hydrologic Unit 03030003
(Figure 2) The Bank shall be planned and designed by Wildlands Engineering, Inc (Wildlands) as an
umbrella bank, with the initial bank site encompassing the Hoosier Dam and a significant length of
Rocky River and several tributaries upstream of the current dam
1.0 Mitigation Bank Introduction and Objectives
11 Introduction
The Hoosier Dam is located on the Rocky River in Chatham County within the Cape Fear River Basin
The dam impounds approximately 22,425 feet of Rocky River and six perennial tributary streams Prior
to construction of the Hoosier Dam, a boulder dam was installed on the Rocky River approximately
4,800 feet upstream of Hoosier Dam that created a smaller impoundment on the river (Figure 2) This
historic boulder dam was inundated when the larger Hoosier Dam was constructed, but was left in
place
The U S Fish & Wildlife Service (FWS) has designated sections of the Rocky River upstream and
downstream from Hoosier Dam, as well as a section of Bear Creek dust below the dam, as Critical
Habitat for the Cape Fear shiner, a federally listed endangered species (FWS, 2988) The non -
impounded sections of the Rocky River and Bear Creek exhibit very high quality rivenne habitat that
supports a diverse collection of aquatic species including the Cape Fear shiner and other species of
concern, such as the Eastern creekshell (Villosa delumbis) and the Carolina creekshell (Villosa
vaughaniana) The dam represents a significant blockage to aquatic species' migration and as a result,
FWS has documented declines in the disconnected Cape Fear shiner population upstream of the dam
(FWS, 2988) Removal of the blockage created by the dam to provide access to these high - quality
reaches would be of substantial long -term benefit to aquatic communities including the Cape Fear
shiner
The Hoosier Dam Mitigation Bank includes over 22,425 linear feet (LF) of the Rocky River and six
perennial tributaries The Bank will be created through the following river restoration activities
• De- watering of Reeves Lake, the impoundment created by Hoosier Dam
• Development and implementation of a sediment management plan for the historically
inundated areas of Rocky River and six tributaries
• Seeding, planting, and stabilization of the historic riverbank and exposed soils as the water
level in Reeves Lake drops to minimize sediment discharge to downstream reaches
• Removal of the full extent of the Hoosier Dam, including the embankment, spillway, and
adjacent powerhouse facility, and restoration of Rocky River at the dam site
• Removal of the remnant rock dam that is located approximately, 4,80o feet upstream of
Hoosier Dam (with reuse of the boulders for fish habitat enhancement measures)
Hoosier Dam Mitigation Bank Page 2
Prospectus

• Restore shallow water habitat for the Cape Fear shiner immediately upstream of the dam —
extent to be determined based on topographic survey and geomorphic and sediment
assessments
• Continue efforts to preserve the existing forested riparian buffer along Rocky River and its
tributaries within the limts of the Bank
1.2 Bank Location
The proposed Bank site (35° 38' o8 "N, 790 1i' 4o "W) is located in Chatham County, along N C Highway
87 approximately 6 miles south of the of the Town of Pittsboro, North Carolina (Figure 1) The subject
site is located on the Rocky River approximately 5 1/z miles upstream of its confluence with the Deep
River (HUC 03030003)
To access the site from Raleigh, drive south on US -1S for approximately 31 miles Exit onto NC-
87N /US- i5N /US -5oiN /Hawkins Ave and drive north for approximately 6:1 miles Turn left onto Walter
Bright Road and proceed west for approximately o 5 miles Turn right to stay on Walter Bright Road
and proceed west for another o 6 miles Turn right onto Asbury Church Road and proceed north for
approximately o 6 miles Turn left onto Mays Chapel Road and proceed north for approximately 1 o
mile Turn right onto Woody Dam road and proceed for approximately o 5 miles to the dam site on the
right
1.3 Bank Objectives
The Bank will provide numerous ecological benefits within the Rocky River and Cape Fear River Basin
Expected improvements to aquatic species, aquatic habitat, water quality, and ecological processes
from the Bank are listed below in Table 1
Table i Bank Goals and Methods of Achievement
Hoosier Dam Miticiation Bank Prospectus
Improve water quality
Seasonal thermal stratification within Reeves Lake (See Section 3 z 5) has
negatively affected water temperatures and dissolved oxygen
concentrations within the impoundment and downstream of Hoosier
Dam The 2012 303(d) list identifies Reeves Lake as "water quality limited"
due to elevated levels of chlorophyll a, which is an indicator of excessive
algal growth resulting from high nutrient loads flowing into the lake
Releases from Hoosier Dam can degrade water quality downstream in the
Rocky River and Deep River By removing the dam and the impoundment,
the Bank will significantly improve water quality within this reach of Rocky
River and to downstream reaches of the Rocky River and Deep River
Restoration of an appropriate
Once the impoundment is drained and the dam embankment, spillway,
flow regime and aquatic
and powerhouse are removed, the more natural flow regime (lotic
community
conditions) of the Rocky River will be restored The build -up of sediment
within Reeves Lake will be removed once the lake is drained, and natural
shallow water habitat preferred by the Cape Fear shiner will be restored
on Rocky River and the lower reaches of six perennial tributaries This
may include placement of in- stream structures to improve habitat
diversity This will promote establishment of the appropriate aquatic
community
Restoration of habitatfor Federal
Habitat will be restored for the federally - listed Cape Fear shiner through
protected aquatic species
removal of the dam and impoundment, and restoration of the appropriate
riverine (lotic) habitat and natural flow regime
Hoosier Dam Mitigation Bank Page z
Prospectus

Restoration of passage for
aquatic species
Although not an anadromous species, removal of the dam embankment,
spillway, powerhouse, and other facilities will connect critical habitat
areas and restore passage for the Cape Fear shiner and other aquatic
species
Preservation and restoration of
The Bank Sponsor has purchased a significant amount of the riparian
wooded buffers
areas along the Rocky River and Tributaries 2, 3, 4, and 5 (See Figures 5
through 5d) Forested riparian buffers owned by the Bank Sponsor in the
Bank will be preserved, while those that have been cleared by previous
land use activities will be restored with native vegetation Over time, the
Bank Sponsor plans to pursue opportunities to protect and restore
additional riparian buffers within the Bank along the Rocky River and its
tributaries
Benefits to downstream water
Coarse sediment has been captured in the impoundment due to reduced
bodies
flow velocities caused by the impoundment Once the natural flow regime
is re- introduced, a more natural sediment supply and transport will be
restored within the inundated section and to downstream reaches of the
Rocky River
14 Qualifications of Bank Sponsor
Bank Sponsor and Contact Information
Bank Sponsor
13o of Chatham
3409 Birk Bluff Court
Cary, NC 27518
Phone 919 - 632 -o161
Fax 828 - 707-9413
Attn Tim Sweeney, Owner
Email bretQa uniqueplacesllc com
Authorized Agent
Wildlands Engineering, Inc
1430 South Mint Street, Suite 104
Charlotte, NC 28203
Phone [phone]
Fax [phone]o6
Attn Shawn Wilkerson, President
Email swilkerson@a wildlandseng com
The Bank Sponsor, 130 of Chatham, LLC, is a private land holding company that focuses on the
acquisition, restoration and preservation of properties that possess high ecological values As of
January 2013, their land portfolio has eclipsed 35,000 acres and includes land in the mountain, foothill,
piedmont and coastal regions of North Carolina 130 of Chatham, LLC has worked with consultant
Unique Places, LLC over the last four years to implement innovative techniques for restorative land
management and conservation on their land holdings Once a property is acquired, the project team
completes ecological surveys of natural communities and rare species, and uses this information to
develop comprehensive restoration and forest management plans
The Bank Sponsor is working with Wildlands and Schnabel Engineering ( Schnabel) to develop and
execute the dam removal and river restoration portion of the management plan for the Bank
Wildlands is a fully licensed engineering firm with offices in North Carolina, South Carolina, and
Virginia Wildlands specializes in the design and permitting of stream and wetland restoration and
mitigation with a particular focus on ecosystem renewal Our diverse team of engineers, ecologists,
biologists, and hydrologists has assessed over 250 miles of streams for restoration feasibility, designed
and permitted over 75 miles of stream enhancement and restoration work, and managed construction
on over 5o miles of restoration
Hoosier Dam Mitigation Bank Page 3
Prospectus

Wildlands currently holds a contract with American Rivers for planning, design, permitting, and
construction oversight on dam removal projects throughout the southeast U S Through this contract,
Wildlands is currently providing these services to American Rivers on several dam removal projects in
North Carolina, including removal of the Upper Swepsonville Dam in North Carolina
Schnabel offers specialized talents in the analysis, design, and construction support for all types of
dams, including new dams, rehabilitations, and removals Since '1994, Schnabel has provided these
services on over 80o dams, most of which are in the southeast US In North Carolina, Schnabel has been
involved in several dam removal projects of similar size and complexity as the Hoosier Dam
• Upper Kings Creek Watershed Restoration and Dam Removal, Kings Mountain, NC
• X -Way Dam Breach Design, Crossway, NC
• Joe Lambeth Dam Removal, Trinity, NC
• Lake Townsend Dam Removal and Replacement, Greensboro, NC
• Salem Lake Dam Removal and Replacement, Winston - Salem, NC
2.0 Establishment and Operation of Mitigation Bank
2.1 Ownership Agreements and Long -term Strategy
Rocky River Hydro, LLC owns fee simple title for the Bank site, which also conveyed the dam,
hydropower facility, hydropower license, and old boulder dam Rocky River Hydro, LLC is owned by Mr
Timothy Sweeney, who also owns 130 of Chatham, LLC The landowner has signed the Landowner
Authorization Form allowing the United States Army Corps of Engineers (USACE) to enter the site for
assessment purposes A copy of the Landowner Authorization Form is included in the Appendix
Upon completion of the review process for the Bank Prospectus, the Sponsor will submit a detailed
draft Mitigation Plan and Banking Instrument for the Bank The banking instrument will provide
detailed information regarding bank operation including long -term management and maintenance
Once the final Mitigation Plan is approved and the accompanying Banking Instrument executed by
members of the Interagency Review Team (IRT), the Sponsor will record a conservation easement for
the dam site and forested riparian buffers within the limits of the Bank The proposed conservation
easement will help to ensure that only IRT- allowable activities take place The long -term stewardship of
the conservation easement will be transferred to an IRT- approved non - profit organization once the
Bank's monitoring success criteria have been achieved
2.2 Assurance of Sufficient Water Rights
The Bank lies on the main stem of the Rocky River, with a drainage area of over zoo square miles, and
on six perennial tributaries The Bank Sponsor has purchased the dam, power facility, the parcels that
contain the dam structure, and all associated rights These two factors will provide adequate assurance
of sufficient water rights to support the long -term sustainability of the bank
2.3 Proposed Service Area
The Bank will be established to provide mitigation to compensate for impacts to Waters of the United
States and /or State Waters within Cape Fear Hydrologic Unit (HU) 03030003 and portions of HU
03030004, as discussed below (Figure 3)
HU 03030003 includes portions of Chatham, Forsyth, Guilford, Alamance, Randolph, Montgomery,
Moore, and Lee counties It also contains the urban areas southeast of the Triad, and lies along the US-
3.5/5o'1 and US 2/64 corridors Population growth within Cape Fear subbasin 03 -06 - 12 is expected to
increase by approximately ioo,000 people over the next zo years The Bank will provide mitigation for
Hoosier Dam Mitigation Bank Page 4
Prospectus

unavoidable impacts to Waters of the U S and State Waters caused by new development that will likely
occur to support this level of population growth
To date, Cape Fear HU 03030003 has experienced low to moderate demand for stream mitigation units
The Carbonton Dam Mitigation Project produced a supply of mitigation credits that significantly
exceeds demand in this basin As a result, it is very unlikely that the NC Ecosystem Enhancement
Program (the largest single purchaser of mitigation credits in the state) will need additional stream
mitigation credits in this basin within the foreseeable future
Given the physiographic similarity and proximity, and to help maintain the economic viability of the
Bank, the proposed service area also contains portions of Cape Fear HU 03030004 (Figure 3) HU
03030004 includes the urban growth area in southwest Wake County around Raleigh and Cary, and
parts of Harnett and Wake counties Historically, this portion of HU 03030004 has experienced
moderate demand for stream mitigation units, but this area is not currently served by an existing
stream mitigation bank The boundary between these two HUs is arbitrary since this portion of HU
03030004 has similar physiographic characteristics (central Piedmont) as HU 03030003, and excludes
the Sand Hills and coastal plain Additionally, from an ecological perspective, it is likely the Cape Fear
shiner and other aquatic species that would benefit from this project move between these two
watersheds For these reasons, providing compensatory mitigation for this area of HU 03030004 by the
Bank is consistent with regulatory policy
2.4 Need and Feasibility of Mitigation Bank
2 41 Need
The Cape Fear shiner is a federally - listed endangered species that only occurs only in North Carolina
Based on the FWS 1.988 Cape Fear shiner Recovery Plan (Recovery Plan), only three critical habitat
areas have been identified in Chatham, Lee, Randolph, Harnett, and Moore counties, North Carolina
(1) a 41 mile reach of the Rocky River upstream of Hoosier Dam, (2) 7 3 miles of the Rocky River and
Deep River downstream of Hoosier Dam, which includes o 5 miles of Bear Creek, and (3) 1 5 miles of
Fork Creek These isolated populations and the limited critical habitat areas put the Cape Fear shiner at
serious risk for long -term survival
Critical habitat areas #1 and #2 above are separated only by Hoosier Dam and its impoundment,
Reeves Lake (Figure 4) Therefore, construction of Hoosier Dam has had two significant impacts on the
Cape Fear shiner First, the dam creates a blockage to fish movement that has disconnected two of the
three critical habitat areas and prevents interaction between the two resident populations Secondly,
the impoundment caused by the dam inundates the shallow, rocky riverine habitat preferred by the
Cape Fear shiner The Recovery Plan states that dam construction in the Cape Fear River system has
probably had the most serious impact on the species A primary goal of the Recovery Plan is to re-
establish the Cape Fear shiner into historic habitat By removing Hoosier Dam and restoring the
shallow water habitat preferred by the Cape Fear shiner, the Bank will play an important role in
expanding its habitat and helping to strengthen the population that exists on Rocky River, Bear Creek,
and Deep River
Every two years, the NCDWQ publishes a list of impaired water bodies according to the Clean Water
Act (Section 303(d)) and 40 CFR 130 7, known as the 303(d) list The list is a comprehensive public
accounting of all water bodies that do not meet water quality standards including designated uses,
numeric and narrative criteria, and anti - degradation requirements defined in 40 CFR 130 7 Standards
violations may be due to a single or multiple pollutants, and the source of impairment could be from
point sources and /or nonpoint sources North Carolina's methodology is strongly based on aquatic life
use support guidelines
Hoosier Dam Mitigation Bank Page 5
Prospectus

The 2012 303(d) list identifies Reeves Lake as "water quality limited" due to chlorophyll a, which is an
indicator of excessive algal growth resulting from high nutrient loads flowing into the lake The water
quality within Reeves Lake likely varies seasonally, with low dissolved oxygen levels, stratified
temperatures, and high chlorophyll a levels during the summer due to warmer temperatures and the
effects of the impoundment By removing the dam and the impoundment, the Bank will significantly
improve water quality within this reach of Rocky River and to downstream reaches of the Rocky River
and Deep River A more detailed discussion of water quality is presented in Section 3 2 5
2 4 2 Feasibility
Hoosier Dam consists of a small powerhouse, a run -of -river spillway, and a short earthen embankment
to the left of the spillway A portion of the spillway on the left riverbank (looking downstream) consists
of a concrete gravity section with a nearly vertical downstream face The right side of the spillway
consists of a slab and buttress section with eight bays, which extend to the powerhouse on the right
side of the dam Downstream of the dam, the majority of the river channel is exposed rock The left
river bank directly downstream of the structure has been benched and armored with riprap
Schnabel has performed several borings on the left and right abutments as part of the geotechnical
investigation These borings were performed to evaluate subsurface conditions for removal of the dam
and embankment, and for the design of potential stream bank stabilization measures Based on the
borings and field observations, the right bank adjacent to the powerhouse consists of very dense
residual soils with remnant rock structure (often referred to as transition material) underlain by rock
The natural steep banks and exposed weathered rock adjacent to the dam indicate that the boring is
representative of this area Based on our drilling and observations, minor grading after removal of the
dam may be required to transition the bank from the narrower valley upstream of the dam to the wider
valley downstream
The left bank adjacent to the dam consists of a fill layer, 18 to 28- feet -deep, underlain by a thin layer of
very dense residual soils with remnant rock structure (often referred to as transition material) and then
rock The fill soils would be expected to be highly erosive The fill soils observed in the borings are likely
the result of original dam construction For demolition of the training wall during removal of the dam
and for stabilization of the bank, the fill slope behind the wall and upstream of the dam will be graded
to match the grades of the slope downstream of the dam
The removal of Hoosier Dam, draining the impoundment, and restoration of the Rocky River and its
tributaries is proposed to occur through a staged approach, carefully designed to minimize potential
disturbances to water quality or aquatic life
• Phase I — Dewatering Reeves Lake and Sediment Management, which will consist of the
following activities
• Draining of the reservoir during the cooler months of the year (late fall through early
winter) through the existing powerhouse
• Removal of power generation and ancillary equipment from the powerhouse
• Potential sediment removal, as determined by the Sediment Management Plan, as the
water levels drop (sediment management is discussed in more detail in Section 3 2 6)
• Phase II — Initial Dam Removal and River Bank Stabilization, which will consist of the following
activities
o Selective demolition of the dam to lower the spillway crest and establish a stream
channel notch through multiple bays of the slab and buttress section of the dam that
will maintain instream flow to support downstream aquatic communities
Hoosier Dam Mitigation Bank Page 6
Prospectus

• Re- establish and stabilize the river channel immediately upstream and downstream of
the dam structure based on comparison to reference conditions downstream of the
dam and upstream of the impoundment Stabilization of the river banks will be
accomplished by removal of the embankment fill to establish a stable slope angle prior
to demolition of the retaining wall
• Seeding, planting, and stabilization of the historic riverbank and exposed soils
• Phase III - Final Dam Removal and River Restoration, which will consist of the following
activities
• Removal of the remaining portions of the dam and final stabilization and grading in the
areas adjacent to the dam
• Potential sediment removal as determined in the Sediment Management Plan
• Removal of the remnant rock dam that is located approximately 4,80o feet upstream of
Hoosier Dam (incorporate these boulders into habitat enhancement measures on
Rocky River)
• Stabilization and restoration of the Rocky River and its tributaries
• Restore shallow water habitat for the Cape Fear shiner immediately upstream of the
dam — extent to be determined based on topographic survey and geomorphic and
sediment assessments
• Restoration of riparian buffers areas under the ownership of the Bank Sponsor that
have been cleared by previous owners
Phase IV — Additional Buffer Preservation and Restoration, which will consist of the following
activities
o Continued efforts to protect, preserve and restore the forested riparian buffers along
the Rocky River and its tributaries within the Bank limits
Bank Sponsor will coordinate with Wildlands and Schnabel to develop the Demolition Plan and
Sediment Removal Management Plan to minimize water quality and ecological impacts to the Rocky
River and downstream water bodies These plans will be submitted to the IRT for review and approval
3.0 Ecological Suitability of Site
3.1 Bank Site Charactenzation
Hoosier Dam and Reeves Lake are located within the Piedmont physiographic region and the Carolina
Slate Belt, which is characterized by low summertime base flows The Rocky River originates in the
eastern portion of Forsyth County and flows southeast through Guilford, Randolph, Chatham, and Lee
counties before its confluence with the Deep River The Bank has a watershed area of approximately
zoo square miles at Hoosier Dam
The Bank is located within Cape Fear River subbasin 03 -06 -12 (NCDWQ 2005) The population within
the subbasin in Year 2000 was approximately 20,00o residents Land use within the subbasin is
predominately forest (70 percent) and agriculture (27 percent), with less than z percent urban
development
Hoosier Dam is a concrete buttress dam with an attached hydroelectric powerhouse The dam was built
in 1922, and is constructed of reinforced concrete, with a total length (including the powerhouse), of
235 feet and an average structural height of 25 feet The hydroelectric facility at Hoosier Dam contains
three small turbines that were operated by Hoosier Hydroelectric, Inc, as a small renewable energy
producer In October, 2012, the renewable energy contract with Progress Energy Carolinas was
terminated, and in 2013 a new contract between Rocky River Hydro LLC (the current owner) and Duke
Hoosier Dam Mitigation Bank Page 7
Prospectus

Energy Progress was established The dam will continue to be operated as a hydroelectric facility until
removal
Land use directly adjacent to the Bank is predominantly undisturbed woodland, with areas of pasture
and pine plantations (Figure 4) The entire Site impoundment is bordered by a mature riparian buffer
that varies in width from 40 feet to over zoo feet
Hoosier Dam and Reeves Lake are responsible for the loss of natural flow regime and shallow water
habitat to approximately 22,425 linear feet of stream ecosystem (16,o6o linear feet within the Rocky
River and 6,365 linear feet of perennial tributaries)
3.2 Baseline Site Conditions
3 z 1 Existing Streams
Reeves Lake occurs within the main channel of Rocky River, and is a 'run of the river" impoundment
with water depths ranging from 6 feet up to approximately 25 feet Near the dam site, the impounded
reach of Rocky River contains the remnant floodplain which was cleared dust prior to filling Reeves Lake
Farther upstream, the impoundment is restricted to the historic river channel The six tributaries
inundated by Reeves Lake have widths that range from 10 to zo feet, with varying depths that are
dependent upon the relationship between the channel thalweg and the elevation of the dam crest The
stream beds of the tributaries dust upstream of the limits of Reeves Lake consist primarily of boulder,
cobble, and gravel substrate with shallow riffles No headcuts were noted during a visual assessment of
these reaches
Wildlands will complete a geomorphic assessment and a determination of perennial versus intermittent
flow for each of the tributaries, and provide copies of the completed data sheets in the Mitigation Plan
The potential need for restoration or stabilization measures of these tributaries following the draining
of the impoundment and removal of the dam will be assessed and discussed in the Mitigation Plan
3 z z Wetlands
Bank Sponsor will perform a jurisdictional determination of wetlands adjacent to the Rocky River and
on each tributary affected by the impounded water The primary source of hydrology will be identified
for each wetland area, potential acreage loss and /or change in wetland type and function will be
assessed, and mitigation measures will be considered based on this information This information will
be provided in the Mitigation Plan
3 z 3 Soils
Several borings were taken adjacent to the left and right abutments as part of the geotechnical
investigation These borings were performed to evaluate subsurface conditions for the removal of the
dam facility and for stabilization of the river bank Based on the borings and our field observations, the
right bank adjacent to the powerhouse consists of shallow residual soils underlain by rock The left bank
adjacent to the dam consists of a fill layer, 18 to 28- feet -deep, underlain by a shallow transition zone
and then rock
According to the NRCS Soil Survey for Chatham County (Figure 6), the riparian soils further upstream
along the Rocky River consists primarily of silty clay loam (BaE and NaD), with smaller occurrences of
sandy loam (PeB and PsB), silty clay loam (CkQ, and silty loam (GoE) None of these soil types are
characterized as hydric
3 z 4 Existing Riparian Buffer Vegetation
Except for a small area cleared at the dam site, the existing riparian buffer along the Rocky River is
completely forested around Reeves Lake, with buffer widths that range from approximately 75 feet to
Hoosier Dam Mitigation Bank Page 8
Prospectus

well over 300 feet At this time, the Bank Sponsor has purchased and protected approximately 35% of
the riparian buffer along the Rocky River within the bank limits (See Figures 5a through 5d) The banks
of the river are forested with riparian vegetation typical of the region, such as river birch (Betula nigra),
box elder (Acer negundo), green ash (Froxmus pennsylvanica), sycamore (Platanus occidentalts),
shagbark and bitternut hickory (Carya spp ), and swamp chestnut, cherrybark, and willow oaks (Quercus
spp ) Several pine plantations and pasture areas have encroached within zoo feet of the riverbank,
otherwise, the riparian forest is largely intact for 3.0o feet or more on both riverbanks
Except for Tributary 4, the banks of the six perennial tributaries are also forested with riparian
vegetation typical of the region, such as river birch, box elder, green ash, sycamore, shagbark and
bitternut hickory, and swamp chestnut, cherrybark, and willow oaks At this time, the Bank Sponsor
has purchased and protected i00% of the riparian buffer along Tributaries 3 and 4, and approximately
33% of the riparian buffer along Tributary 2 (See Figures 5a through 5d) Most of the riparian corridor
along Tributary 4 has been cleared with only a narrow row of trees along the top of bank The parcel
that contains Tributary 4 is now under the ownership of the Bank Sponsor, which will allow the riparian
buffer to be restored with native vegetation as part of the Mitigation Plan The Bank Sponsor will
continue to pursue opportunities to purchase or protect the intact riparian buffers along Tributaries 3., 5,
and 6
3 2 5 Water Quality
Local water quality data within this reach of the Rocky River is not available from federal or state
agencies Therefore, Wildlands performed an initial assessment of water quality in Reeves Lake and in
the Rocky River upstream and downstream of the Hoosier Dam between July 3.5, 2013 and September
6, 203.3 This initial assessment of water quality was focused on establishing a better understanding of
(3.) the baseline water quality in the Rocky River and Reeves Lake, and (2) the extent that Reeves Lake
may be acting as either a source or a sink for pollutants, primarily sediment and nutrients
Baseline Water Quality
On six dates during the summer of 2013 (7/3.3./203.3, 7/25/203.3, 8/2/203.3, 8/3.5/203.3, 8/30/203.3, 9/6/203.3),
temperature and dissolved oxygen (DO) profiles were measured in Reeves Lake Each variable was
measured for every foot of depth at a location approximately 3.0o feet upstream of Hoosier Dam Such
profiles give an indication of the extent of thermal stratification that occurs in Reeves Lake, and the
effect it has on aquatic life that can be supported in the impoundment
The temperature profiles plotted on the graph below show temperatures ranging from 26 8 °C at the
surface to 22 2 °C at a depth of 3.g ft In a study of the Cape Fear shiner by Hewitt et al (2006), the
habitats with the best survivability and growth rate had temperatures ranging from 26 4 °C to 28 3.°C
This range was only achieved on three sampling dates and only within the top four feet of lake depth
Hoosier Dam Mitigation Bank Page 9
Prospectus

Depth vs Temperature in Reeves Lake
21 22 23 24 25 26 27 28 29
0 -
-2 --
-4 —
-6
r -8
c
a 10
CU
m -12
3
-14
-16
-18
-20
AX I@
A x I*
r. ♦ X ■ X
- -- - - -- p— - -- 19E - -� --
a x ♦ • ♦
A X ♦ ■
AX ■ t x
- - - -- 0f -- ♦-- - -- —
XA ■ ♦ W
AU+
�G ♦ i�
■>F+-
X
Temperature, °C
7/11/2013
7/25/2013
♦ 8/2/2013
Ea 8/15/2013
8/30/2013
x 9/6/2013
The DO profiles plotted on the graph below show a dramatic decrease in DO concentrations in the first
six feet of depth, typically dropping from 5 to 8 mg /L near the surface to below 3- mg /L near the bottom.
All samples fall below 5 mg /L within the first four feet of depth. The aforementioned study by Hewitt et
al. (2oo6) indicated the best habitat for Cape Fear shiner has a DO range from 5.8 -3-2.5 mg /L.
Depth vs Dissolved Oxygen in Reeves Lake
0 1 2 3 4 5 6 7 8 9
0
-2
-4
-6
t -8
CL
C
0 10
L
o -12
-14
-16
-18
-20
Dissolved Oxygen, D0, mg /L
m 7/11/2013
ei7/25/2013
♦ 8/2/2013
* 8/15/2013
8/30/2013
x 9/6/2013
Hoosier Dam Mitigation Bank Page so
Prospectus
■ ♦ x X
■ ♦ X ♦
• o x
Xk C:
■ ♦ X,
X i+
f X
♦
X■
X ■ 0
�.
X W
Ix
Dissolved Oxygen, D0, mg /L
m 7/11/2013
ei7/25/2013
♦ 8/2/2013
* 8/15/2013
8/30/2013
x 9/6/2013
Hoosier Dam Mitigation Bank Page so
Prospectus

This temperature and DO data indicate that suitable water quality for the Cape Fear shiner and many
other aquatic species may only exist in the top four feet of the water column in the impoundment,.
however, the shallow water habitat preferred by the Cape Fear shiner does not exist there. Additionally,
the DO is below 1 mg /I for the majority of the water column (6ft-19ft), which isn't conducive to
supporting most aquatic life.
Effect of Reeves Lake
To develop a better understanding of the effect Reeves Lake may have on the water quality of the
Rocky River and downstream water bodies, two ISCO Brand water samplers were installed: (1) the
Upstream Station is located upstream of the impoundment approximately 350 feet east of the bridge at
Pittsboro Goldston Rd, and (2) the Downstream Station is located approximately 350 ft downstream of
Hoosier Dam. The two ISCO samplers collected a water sample every four hours, four days a week
between July 15, 2oi3 and September 6, 2013. A total of 72 water quality samples collected at each
station were tested for Total Suspended Solids (TSS), Nitrate ( NO3), Ammonium (NHO, Total
Kjeldahl Nitrogen (TKN), Phosphate (PO4'-), Total Phosphorus (TP) and Total Dissolved Nitrogen
(TDN).
All data from samples were separated into two groups by station (Upstream or Downstream) for
analysis. The data populations were then analyzed using a 2- tailed T -test to determine if they were
significantly different frorn one another (p < o.o5, n =72).
For TSS, results of the T -test indicated a significant difference between the two stations, with the
Downstream Station having a higher average concentration (8.3 mg /L) than the Upstream Station (4.6
mg /L) (p= 4.7x10 -6). This may be due to turbulence at the dam causing re- suspension of settled
sediment and other particulates.
60
50
J
00
E 40
0
30
c
" 20
0
U
10
TSS Concentrations Up- and Downstream of Reeves Lake
7/30-013 - 9/6/2013
Upstream Downstream
For phosphorus, a less distinct difference was found between the Upstream and Downstream Stations.
While PO4'- did not vary significantly between the two stations, TP had slightly higher average
concentrations downstream (o.o8 mg /L) than upstream (o.o6mg /L) (p= 5.5x10 -'). Since TP mainly
occurs in particulate form in lotic ecosystems, it is not surprising that this would correlate with the
results for TSS.
Hoosier Dam Mitigation Bank Page iz
Prospectus

0.2
0.18
'fill.
J
m 0.14
E
0.12
0
0.1
L
OW 0.08
u
o 0.06
,WEI
0.02
0
Phosphorus Concentrations Up- and Downstream of Reeves Lake
7/30/2013 - 9/6/2013
Upstream PO4 -P Downstream PO4 -P Upstream TP -P Downstream TP -P
Several species of nitrogen were also sampled and evaluated. The aqueous forms of Nitrogen (NO3-
and TDN) were higher upstream of the impoundment (NO3- = o.58 mg /L, p= o.oil. and TDN = 1.02 mg /1,
p= 0.034) than downstream of the impoundment (NO3 = 0.42 mg/L, TDN = o.96 mg /1). This is likely due
to the amount of phytoplankton in summer using NO3- for energy production when there is a lack of
oxygen. However, the overall nitrogen levels (TKN) were greater downstream (1.17 mg /1, p= 3..6x,.0 -12)
than upstream (o.98 mg /L).
2
1.8
1.6
J
1.4
E
1.2
0
0 1
r
0.8
U
0 0.6
v
0.4
0.2
0
Nitrogen Concentrations Up- and Downstream of Reeves Lake
7/30/2013 - 9/6/2013
Upstream NO3 -N Downstream Upstream TKN Downstream TKN Upstream TDN Downstream TDN
NO3 -N
Hoosier Dam Mitigation Bank Page sz
Prospectus

Preliminary results from this water quality study indicate that Reeves Lake is acting more as a source
for nutrients and TSS rather than as a sink for these water quality parameters High inputs from
tributaries and biogeochemical interactions within the impoundment itself could be the cause, however
without a more detailed study it cannot be determined at this time
3 2 6 Sediment Characterization and Management
Wildlands performed an initial survey of sediment quantity in July 2013 Water depths over 22 feet
were found along the historic alignment of the Rocky River for a distance of approximately 15oo feet
upstream of the Hoosier Dam Depths ranging from 15 feet to less than 3 feet were found across the
historic floodplain of the river within the existing impoundment This preliminary data appears to
indicate that extensive sedimentation above Hoosier Dam has not occurred
A more detailed evaluation of sediment quantity and quality above the Hoosier Dam will be completed
for the Mitigation Plan To evaluate potential negative effects of the sediment captured within the
Rocky River, Wildlands will perform a detailed bathymetric survey of Reeves Lake to determine the
extent and depths of sediment buildup upstream of the dam in order to estimate the quantity of
sediment likely to be mobilized upon dam removal Wildlands will perform a sediment characterization
to estimate the portion of fines vs coarse - grained sediment Wildlands will also engage staff with the
U S Fish and Wildlife Service (USFWS) to develop a Tier 1 review of the extent, quality, and potential
risks associated with the sediment contained within Reeves Lake If the Tier 1 finds that further
information is needed, a Tier 2 analysis (toxicity testing) will be performed This information (mobile
sediment load, sediment characterization, estimates of background sediment load, and findings of the
Tier 1), and the sensitivity of downstream aquatic communities, will inform the Draft Sediment
Management Plan that will be submitted to the IRT for approval The Sediment Management Plan will
be developed such that the risk of short-term impacts to sensitive aquatic communities downstream is
minimized, and long -term impacts are avoided altogether
3 2 7 FERC License
The hydroelectric facility at Hoosier Dam contains three small turbines that are operated by Rocky
River Hydro LLC, as a small renewable energy producer under contract to Duke Energy Progress Due
its low generating capacity (approximately 23o kW), the hydroelectric facility was issued Exemption
#3586 to the Federal Energy Regulatory Commission licensing process on December 16,1981
The Bank Sponsor will surrender the Exemption #3586 to the FERC License in compliance with FERC
Regulation 4 102 The petition to surrender the exemption will include a report that provides the
reason for surrendering the exemption, a description of how the dam, spillway, and hydropower facility
will be disposed, and a plan and schedule outlining the procedures proposed for removal and
restoration of the dam site to assure public and environmental safety During this process, the Bank
Sponsor will consult with fish and wildlife agencies on restoration of the dam site and adjacent lands
3 2 8 Threatened and Endangered Species
Consultation with USFWS and a search of the USFWS database for federally listed threatened and
endangered species identified four listed species in Chatham County, NC (Table 2)
Hoosier Dam Mitigation Bank Page 3.3
Prospectus

Table z Federally Listed Threatened and Endangered Species
in Chatham County, NC
Species
I Federal Status"
County
Vertebrate
Cape Fear shiner
E
Chatham
(Notropts mekistocholas)
Red - Cockaded woodpecker
E
Chatham
(Picoides borealis)
Vascular Plant
American chaffseed
E
Chatham
(Schwalbea amaercana)
Michaux's sumac
E
Chatham
(Rhus michauxu)
'E = Endangered
As described previously, the Bank site lies between two critical habitat areas for the Cape Fear shiner, a
federally - listed endangered species that only occurs only in North Carolina Critical habitat areas #i and
#z described previously are separated only by Hoosier Dam and Reeves Lake These isolated
populations and the limited critical habitat areas put the Cape Fear shiner at serious risk for long -term
survival Since this project may affect the Cape Fear shiner, consultation with the USFWS under
Section 7 of the Endangered Species Act will likely be required
Wildlands will coordinate with the USFWS and the USACE during the initial informal consultation
process on issues related to the Cape Fear shiner populations upstream and downstream of Hoosier
Dam, and conduct a site review to determine if habitat conditions are conducive for the other listed
species If formal consultation under Section 7 is required, Wildlands will prepare a biological
assessment (BA) at the appropriate time All surveys for rare, threatened, and endangered species will
be conducted by personnel qualified and permitted to identify those species
3 29 Cultural Resources
A preliminary search of the North Carolina State Historic Preservation Office for cultural and historic
resources indicated there are no known National Register Properties or previous archaeological survey
sites within the Bank site It is anticipated that a Phase I Cultural Survey will be required to ensure no
impact to cultural or historic resources, and to coordinate the removal of the dam and hydropower
facility
4.0 Mitigation Work Plan
As described previously in Section z 4 z, draining Reeves Lake, removing Hoosier Dam, and restoring
the Rocky River and its tributaries are proposed to occur through a staged approach
• Phase I — Dewatering Reeves Lake and Sediment Management
• Phase 11— Initial Dam Removal and River Bank Stabilization
• Phase III - Final Dam Removal and River Restoration
• Phase IV— Additional Buffer Preservation and Restoration
The overall Mitigation Work Plan will guide the activities during each of these phases, and will consist of
the following components to ensure the Bank will meet its goals while minimizing potential
disturbances to water quality or aquatic life, with a special emphasis to protect the remaining
populations of the Cape Fear shiner
Hoosier Dam Mitigation Bank Page 14
Prospectus

Dam Demolition and Dewatering Work Plan Wildlands has partnered with Schnabel to prepare the
Dam Demolition and Dewatering Work Plan based on the results of the geotechnical investigation and
structural analysis of the existing dam The Dam Demolition and Dewatering Plan will be designed to
ensure that the demolition of Hoosier Dam and the initial dewatering of Reeves Lake occurs in a
manner that minimizes water quality and ecological impacts to downstream water bodies and aquatic
communities while maintaining instream flows
Sediment Management Plan Wildlands will develop the Sediment Removal Management Plan for the
Rocky River and its tributaries based on the results of the detailed bathymetric survey, sediment
characterization, and the Tier z sediment assessment The measures and procedures in this plan will be
implemented prior to initial dewatering of Reeves Lake and continue throughout the project
implementation and monitoring period
River Restoration Plans Wildlands will prepare the construction documents and technical
specifications for restoration of the newly exposed river banks and shallow water habitat that is
appropriate for this reach of the Rocky River The plans will also contain any restoration or stabilization
measures necessary to protect or restore the tributaries once Reeves Lake is drained
Wooded Buffer Restoration Plans Wildlands will prepare restoration plans for cleared buffers within
the bank limits that will contain the plant materials list, specifications for the plant material, and
planting details
Monitoring Plan Wildlands will prepare a monitoring plan for the Bank, which will include pre- and
post - removal monitoring to document the geomorphic, water quality, and biological conditions at the
Bank site The monitoring plan will contain the following components and continue for 7 years after
construction activities are completed
• Water quality monitoring focused on temperature, dissolved oxygen, and chlorophyll a
• Aquatic surveys (e g , fish, mussel, and benthic macro i nverte brates) to document the pre -
removal and post - removal aquatic communities within the Bank, above the impoundment, and
below the dam, with an emphasis on showing a shift from lentic to lotic communities
• Geomorphic surveys of the six tributaries to the Rocky River
Each of these components of the overall Mitigation Work Plan will be submitted to the IRT for review
and approval prior to the start of construction activities
5.0 Determination of Mitigation Credits
Guidance for determining mitigation credits for dam removal projects was initially provided in the
document Determining Appropriate Compensatory Mitigation Credit for Dam Removal Projects in North
Carolina, which was developed cooperatively by the U S Army Corps of Engineers, Wilmington District,
the U S Environmental Protection Agency, Region 4, the U S Fish and Wildlife Service, the N C
Division of Water Quality, the N C Wildlife Resources Commission, and the N C Division of Water
Resources in June, 2oo8 This guidance document has since been withdrawn, however its principles
have been applied to generate the proposed stream mitigation units described below
The upstream limits of the impounding effect of the Hoosier Dam on Rocky River and six perennial
tributaries were initially estimated based on the water level of Reeves Lake and LIDAR data for the
tributaries The upper limits of these inundated areas were visited, photographed, and field verified
using hand -held global positioning system equipment (Figure 5) The final lengths for the Rocky River
and each of the six tributaries will be confirmed by a topographic survey of the limits of the impounded
area A summary of the proposed credits is provided in Table 3
Hoosier Dam Mitigation Bank Page 15
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Table 3. Proposed Stream Mitigation Units
Hoosier Dam Mitigation Bank
Mitigation Criteria
Length
(LF)
Credit
Ratio or
Factor
Stream
Mitigation
Units (SMU)
I (A) — Credit for improving the
water quality of Rocky River, its
tributaries, and downstream water
bodies
Rocky River
16,o6o
11
_ i i
16,o6o
_
Tributary 1
68o
68o
Tributary 2
_
1,345
1,130 _
1,375 _
1,230
6o5
1 1
11
11 _
1 1
1 1
1345
_
Tributary 3
1,130
Tributa 4
1,375
Tributary 5
1,230
_
Tributary 6
6o5
Subtotal
22,425
1 (C) — Credit for Rare, Endangered,
and Threatened Species
Restoration of habitat
True
10
0
Recolonization of
associated species
True
10
0
Recolonization of
targeted species
True
10
0
Subtotal
o
II (B) — Wooded Buffers Protected
Rocky River
36%
__ o%---
16% _
l00%
095
20
845
_
Tributary 1
0
_
Tributary 2
10
075
0
_
Tnbuta 3
377
Tributa 4
87%
_ o%__
0%
__07S
__1 o_ _
20
458 _
Tributary 5
o
Tributary 6
0
Subtotal
i,68o
Total SMUs
24,205
The credits listed above for the tributaries 1, z, 5, and 6 will only be generated if the Bank Sponsor is
able to protect and preserve a minimum 50 foot wide wooded buffer along both sides of the stream for
at least 50% of the length
Based on initial comments from the IRT, generation of stream mitigation credits for water quality
improvements and restoration of rare, threatened, and endangered species for the Rocky River and the
six perennial tributaries will not exceed a ratio of 11 The bank sponsor proposes to preserve riparian
buffers along a significant portion of the mamstem of Rocky River and its tributaries This approach to
preserving buffers along the mainstem has not been undertaken on any previously approved dam
removal mitigation projects For this reason, we propose to generate credit above the base 11 ratio
following the methodology in the rescinded dam removal guidance The final number of stream
mitigation units generated by the Bank will be based on coordination and approval by the IRT Given
the above credit ratios, factors for dam removal, and restoration of habitat for the Cape Fear shiner, a
federally protected aquatic species, an estimated 24,105 stream mitigation units will be available from
the establishment of the Bank
Use of credits from the Bank to offset stream impacts authorized by federal permits or state water
quality certifications must be in compliance with the Clean Water Act, Section 404 (b)(1) guidelines and
other applicable state and federal legislation, regulations, and policies Prior to the release of credits,
the following requirements will be met
1 IRT approval of the final Mitigation Plan,
Hoosier Dam Mitigation Bank Page 16
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z Execution of the banking instrument,
3 Recordation of the conservation easements, and
4 Establishment of appropriate financial assurances
The credit release schedule shown below in Table 4 is in compliance with the Monitoring Requirements
and Performance Standards for Compensatory Mitigation in North Carolina, February g, 2013
Table 4. Credit Release Schedule
Hoosier Dam Mitigation Bank
Task
Percentage of
Credits Released
Site Establishment — Execution of MBI, approval of final
Mitigation Plan, delivery of Financial Assurances,
recordation of Conservation Easement, 404 permit
15%
Construction Phase Complete —All initial physical and
biological improvements made pursuant to the
Mitigation Plan
15%
Year 1 Monitoring
io%
Year z Monitoring
zo%
Year 3 Monitoring
so%
Year 4 Monitoring
5%
Year 5 Monitoring
10%
Year 6 Monitoring
5%
Year 7 Monitoring
10%
6.0 Maintenance and Long -term Sustainability
6.2 Maintenance
Adaptive measures will be developed or appropriate remedial actions will be implemented in the event
that the site or a specific component of the site fails to achieve the success criteria outlined in the final
Banking Instrument The project— specific monitoring plan developed during the design phase will
identify an appropriate threshold for maintenance intervention based on the monitored items Any
actions implemented will be designed to achieve the success criteria which will be specified in the
Banking Instrument, and will include a work schedule and updated monitoring criteria
6.2 Long Term Management Provisions
The Bank Sponsor will institute a Long Term Management Plan responsible for assessing the condition
of the mitigation site and implementing maintenance provisions to maintain performance of the site
The proposed conservation easement will help to ensure that only IRT- allowable activities take place
and will be transferred to an IRT approved non - profit organization once monitoring success criteria
have been achieved
To monitor the project's continued success, the Long Term Management Plan will be implemented
following the seven -year monitoring period Key restoration and stabilization measures will be
inspected annually or less frequently as needed to ensure that the project remains stable Sources of
instability or other deficiencies will be addressed Invasive plant and aquatic species will be managed
annually or less frequently as needed to ensure the long term survivability of the planned communities
All reporting will be documented and kept on file for future reference
Hoosier Dam Mitigation Bank Page 17
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7.0 References
Hewitt, Amanda H et al 2oo6 Influence of Water Quality and Associated Contaminants on Survival
and Growth of the Endangered Cape Fear shiner (Notropis Mekistocholas) Environmental
Toxicology and Chemistry 25 9 pp 2388-2298
United States Department of Agriculture (USDA), 2oo6 Natural Resources Conservation Service, Soil
Survey of Chatham County, North Carolina
Hoosier Dam Mitigation Bank Page 18
Prospectus

FIGURES
Hoosier Dam Mitigation Bank Page ig
Prospectus

PCL XL error
Subsystem xlparse
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Operator Parser
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Figure, Vicinity Map
W I L ].a L 1, N D S 0 5.5 11 Miles Hoosier Dam Mitigation
ENGINEERING
tz t I I I I Pros ectus
Chatham County, NC
03010404
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W I L ].a L 1, N D S 0 5.5 11 Miles Hoosier Dam Mitigation
ENGINEERING
tz t I I I I Pros ectus
Chatham County, NC

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0 750 1,500 Feet Hoosier Dam Mitigation Bank
kvWILDLANDS Prospectus
ENGINEERING
Chatham County, NC

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0 5.5 11 Miles Hoosier Dam Mitigation Bank
W T L D L A N D S 1 1 1 1 i Prospectus
[NCiINEERING
Chatham County, NC

Figure 5 Conceptual Map
�WILDLANDS 0 750 1,500 Feet Hoosier Dam Mitigation Bank
w V I I i I I Prospectus
E N G I N E F R I N G
Chatham County, NC

Figure sa Conceptual Map - Lower
0 300 600 Feet Rocky River and Tributary 6
%z W I L D L A N D S Hoosier Dam Mitigation Bank
ENGINEERING I I I I I Prospectus
Chatham County, NC

Figure 5b Conceptual Map - Middle
0 300 600 Feet Rocky River and Tributary 5
W I L D L A N D S Hoosier Dam Mitigation Bank
`� ENGINEERING I I Prospectus
Chatham County, NC

Figure Sc Conceptual Map - Middle
0 300 600 Feet Rocy River and Tributaries 1-4
*WWILDLANDS Hoosier Dam Mitigation Bank
ENGINEERING ' I I Prospectus
Chatham County, NC

Figure 5d Conceptual Map - Upper Rocky River
*4z W I L D L A N D S 0 300 600 Feet Hoosier Dam Mitigation Bank
I i i i I Prospectus
ENGINEERING
Chatham County, NC

Figure 6 Soils Map
W I L D L A N D S 0 500 1,000 Feet Hoosier Dam Mitigation Bank
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I i i i I Prospectus
ENGINEERING
Chatham County, NC