19970983 Ver 1_COMPLETE FILE_19971112

CITY OF WINSTON-SALEM
PUBLIC WORKS DEPARTMENT
P.O. BOX 2511 • WINSTON-SALEM, NORTH CAROLINA 27102-2511
November 13, 1998 ac,
J
Mr. Chris Goudreau, Hydropower Relicensing Coordinator ` 9'? o?
Route 6, Box 685 tanS G ?? ,
Marion, NC 28752-9229 ?tTER,A
RE: Idol's Hydroelectric Project, FERC No. 2585
Dear Mr. Goudreau:
This letter is in response to your November 10, 1998 comments concerning the FERC license
surrender for the above mentioned project. There are several statements in your letter that are
inaccurate or that the City of Winston-Salem does not agree with.
In the fourth paragraph of your letter, you refer to the City's Raw Water Intake at the Idol's
Facility as auxiliary. To the contrary, this is the main raw water supply for the system serving
Winston-Salem and Forsyth County. This intake site has been in use since 1949 and the current
intake has been operational since 1978. This intake has an annual average withdrawal rate of 42
million gallons per day and the capacity to provide up to 95 million gallons per day. In 1997, the
population served through this facility by the City/County Utility Commission was 233,000.
In this paragraph you also make reference to the possible redesign of the proposed intake facility
to be located at river mile 146.5. For the record, an Environmental Impact Statement (EIS) for
this project has been prepared and the subsequent Record of Decision approving the design and
construction of this proposed facility was completed on August 9, 1996.
The above mentioned EIS included information relative to alternate intake designs. One of the
alternates included locating the intake in an area of the river that had deeper than normal water
depths (4-5 Feet.) The researchers determined that during certain periods of the year, prevailing
low flow conditions would reduce the depth in the river to a point that would be detrimental to
the operation of the proposed intake. Quoting from the EIS, "Clearly, the natural river depths
could not support the intakes, and a low head weir is needed to keep the intakes submerged."
The conclusion of that research was, that to support a reliable raw water intake, a low head weir
would be required. Therefore, even if this structure were removed, a similar structure would
have to be built to provide a reliable source for the City/County Utility Commission. See page 3-
9 of the "Yadkin River Water Supply Facilities Environmental Impact Statement" for additional
details.
The proposed intake discussed in your letter will not be designed to replace the existing facilities
located at the Idol's site. The purpose of the new intake is to provide expanded growth for the
utility and to provide additional source protection for the City's raw water supply by locating an
intake upstream of the I-40 and US 421 bridge crossings of the river.
The City of Winston-Salem would be opposed to any type of public access facility located in the
vicinity of the intake. In previous years the site was open to the public. The vandalism and
misuse of the site resulted in the City and the previous owner, Duke Power Company, choosing
to close the facility to the public. Even with the facility closed to the public there are still
incidents of vandalism, but at a much lower level than before. In addition, the operation of the
facility is moving to an unmanned operation, therefore, we feel that reopening the site to the
public would only allow the misuse of the site to get worse.
The City of Winston-Salem would be opposed to the removal of the Idol's Dam and Powerhouse
structures. A review of the structure by both a private structural engineer and North Carolina
Division of Environment and Natural Resources personnel responsible for the State's Dam
Safety Program have shown the structure to be sound and that no structural repairs are needed.
The facility has been in place for essentially one hundred years and has served as a reliable raw
water intake for fifty years. The removal of the structure and construction of a new facility
would put an undue burden on the customers of the City/County Utility Commission.
Your interest in this project is appreciated. If you have any questions, please feel free to call me
at [phone].
Sincerely; \
David K. Saf tiers, PE
Utility Plants Engineer
DKS
cc: Tom Griffin, City of Winston-Salem
Barry Shearin, City of Winston-Salem
J. Charles Alrichs, Northbrook Carolina Hydro
Frank McBride, NCWRC
John Dorney, DWQ
John Ellis, USFWS
Steve Reed, DWR
E North Carolina Wildlife Resources Commission®
312 N. Salisbury Street, Raleigh, North Carolina 27604-1188, 919-733-3391
Charles R. Fullwood, Executive Director
Route 6, Box 685
Marion, NC 28752-9229
September 24, 1999
Mr. James L. Horton
JLH Hydro, Inc.
1800 Statesville Blvd.
Salisbury, NC 28144
Subject: Idols Hydroelectric Project, FERC No. 2585
First Stage Consultation Package
Dear Mr. Horton:
This correspondence responds to your June 28, 1999 letter and August 11, 1999 meeting requesting comments on
the First Stage Consultation Package for FERC License No. 2585 for the Idols Hydroelectric Project. The North
Carolina Wildlife Resources Commission (NCWRC) is authorized to comment and make recommendations
regarding impacts on wildlife and fisheries resources in accordance with provisions of the Federal Power Act (16
U.S.C. 791a et seq.) and the Fish and Wildlife Coordination Act (48 Stat. 401, as amended; 16 U.S.C. 661 et seq.).
The NCWRC, in comments regarding Northbrook Carolina's license surrender, has recommended the dam and
powerhouse be removed. This action will restore upstream access for fish and other aquatic organisms to an
additional 81 miles of the Yadkin River, remove a blockage to downstream nutrient and sediment transport,
eliminate the potential for dissolved oxygen and temperature problems (however slight), and eliminate the
potential for fish impingement and entrainment (however slight). Dam removal is still our preferred
recommendation.
If the dam is not removed, the NCWRC will be requesting provisions for upstream and downstream fish passage.
We are interested in providing and maintaining passage for the Yadkin River between High Rock Reservoir and
W. Kerr Scott Reservoir. Fish passage is also a condition of construction at Winston-Salem's proposed water
intake 21 miles upstream of Idols. Runs of white perch, white bass, striped bass and suckers are currently
restricted from the upstream portions of river. The dam also represents a blockage that fragments populations of
aquatic organisms by limiting gene flow, community interactions and upstream energy and nutrient flow. Also,
the Yadkin River has historically been used by American shad for a distance of over 50 miles upstream of the Idols
project. Relicensing discussions with Carolina Power and Light (FERC No. 2206) and Yadkin, Inc. (FERC No.
2197) will begin in several years and will likely include restoration of anadromous species to upstream portions of
the river. Finally, the Carolina redhorse has been rediscovered in the lower Yadkin River. If found upstream of
High Rock Reservoir it is likely that passage will be necessary at Idols.
We understand that you plan to upgrade the canoe portage on the west side of the river. However, during the
relicensing effort by Northbrook Carolina the NCWRC has consistently recommended provisions for motorboat
access at the Idols project. Currently, no small motorboat public access is available within 24 miles of the project.
A
IDOL'S HYDROELECTRIC GENERATING STATION
FORSYTH COUNTY, N.C.
REGIONAL HISTORIC
MECHANICAL ENGINEERING LANDMARK
Idol's Dam and Power House from South Side of Yadkin River - During Construction 1898
Originally Developed & Operated By
FRIES MANUFACTURING & POWER COMPANY - April 1898
Currently Owned & Operated By
DUKE POWER COMPANY, CHARLOTTE, N.C. - February 1914
E S
m
The American Society of Mechanical Engineers
Carolina Section
September 7, 1984
HISTORIC SIGNIFICANCE OF IDOL'S HYDRO
Idol's Hydro Station, as developed and placed in operation
by The Fries Manufacturing and Power Company on April
18, 1898, was typical of small-scale, low-head first
generation hydroelectric stations of that day. It was the first
commercial hydroelectric generating station in North
Carolina using long distance (131/4 miles) transmission of
alternating current power at 10,000 volts. It provided power
for textile and fertilizer mills, an electric railway system,
electric street lighting, and wood and metal working shops
in the towns of Winston and Salem, N.C. The availability of
electric power generated at Idol's Station enabled the early
development of the Winston-Salem area as a significant
industrial and manufacturing center in North Carolina.
Although its generating machinery was replaced in 1914,
the facility's operation has changed little since the turn of
the century.
PRE-CONSTRUCTION HISTORY AND DEVELOPMENT
The development of Idol's Hydro Station was initiated by
Henry Elias Fries of Winston-Salem, N.C. At the time, Mr.
Fries was involved with the ownership and management of
several textile mills and a grain mill. As a result, he
developed a keen interest in the use of electricity to power
industrial machinery in the 1880's. He was the president
and guiding force behind the February 28,1891 chartering
of the Fries Manufacturing and Power Company, which
proposed harnessing the hydroelectric capability of
Douthit's shoals on the Yadkin River. While on a trip to New
York in 1896 to honor former President Grover Cleveland,
he engaged an electrical engineer in a discussion of the
feasibility of long distance transmission of electric power.
This resulted in his wiring Winston-Salem to obtain approval
to use his uncle's, Henry W. Fries, Douthit Mill site and to
proceed with the development of the facility design. He
engaged C. R. Makepeace and Company, Mill Engineers
and Architects, and Lewis and Claflin, Electrical Engineers,
both of Providence, R.I. to provide the design. Makepeace,
a native North Carolinian familiar with the area, prepared
the mechanical and building plans while Lewis and Claflin
designed the electrical installation and transmission system.
The Idol's Hydroelectric Station received its name from its
location at a former Yadkin River ferry crossing known as
Idol's. It was designed as a run-of-the-river plant to prevent
the flooding of the low lying area above the site that a high
darn would cause. Therefore, the dam could store only a
small amount of hydraulic power and only the irregular flow
of the river could be used. This flow provided an estimated
2,000 to 2,700 horsepower with a yearly average of 2,300
horsepower at a 10 ft. head. The dam and powerhouse
were designed to provide 2,000 horsepower with initial
generating equipment installed for 1,000 horsepower.
The first field surveys began in February 1897 and investors
purchased $50,000 of the original $60,000 of capital stock
issued by Fries Manufacturing and Power Company by the
following April. The firms supplying machinery for the plant
also invested in the project, as did electrical inventors
Thomas A. Edison and Frank J. Sprague.
ORIGINAL PLANT CONSTRUCTION
Construction began in early June 1897 with Watkins &
Hardaway of Birmingham, Alabama, performing the
masonry work on the dam and powerhouse. J. C. Bachelor
of Winston-Salem received the construction contract for a
600 ft. rail siding connecting the construction site to the
Southern Railway tracks which allowed heavy equipment
and machinery to be delivered directly to the site.
Throughout the summer the weather was good, the river
was low, and the work progressed rapidly. Former North
Carolina Lt. Governor Charles A. Reynolds served as chief
engineer for the project. Many of the workers lived in a
construction camp at the site.

The 482 ft., rubble-masonry, curved gravity dam, was built
on stone foundations, stood 10 ft. tall, stepped to 13 ft. at
both ends. A 4 ft. wide, stone-baff led, inclined sluiceway
fishladder was incorporated into the downstream face of
the dam. The dam height was reduced to 91/2 ft. for a 6 ft.
length where the ladder reached the top of the dam to allow
passage of water on normal and high flow. The crest of the
dam measured 6 ft. in width and the base was 12 ft. The
granite stone for the dam and the powerhouse foundation
was quarried at the site. When filled, the reservoir had a
surface area of approximately 35 acres with 6 miles of
shoreline (see the frontpiece picture).
2
Figure 2 - Idol's Hydro Powerhouse
and Tailrace Area - 1898

Figure 4- 150 Ft. Generator Drive Shaft
and Bevel Gearing from Turbines - 1898
t}ir
Figure 3 - 54" Diameter McCormick
Vertical Geartype Turbine
The Powerhouse consisted of a turbine or wheel room and
a generator room at right angles to each other on the north
bank of the Yadkin. The wheel room formed one end of the
dam into which it was built and measured 145 ft. x 36 ft.
It was divided into eight wheel pits which were constructed
of rough stone. The downstream face of the pits had arched
openings which emptied into the tailrace (see figure 2 on
page 2). The foundations extended 4 ft. down into the rock
of the riverbed. The division walls of the wheel pits were
24 in. thick, composed of brick, and served as foundations
for the heavy timber construction of the wheel room. The
walls also supported the 10 in. x 15 in. beams upon which
the machinery of the wheel room rested. The exterior face
of the wheel room consisted of 4 in. wide planking and a
standing-seam metal roof covered the structure. Each wheel
pit was designed to be equipped with two turbines with a
2 ft. x 12 ft. waste gate between them. At the entrance of
the wheel pits a steel trash rack kept floating debris out of
the turbines. The rack extended across the upstream face
of the wheel pits for 144 ft. The plant's generator room was
a single story brick structure located at the north end of the
wheel room. This building measured 39 ft. x 60 ft. and had
a heavy timber frame with an 18 ft. ceiling' height.
The initial machinery installation consisted of eight turbines,
one in each pit. They were of the McCormick vertical gear
type, 54-inch diameter, manufactured by S. Morgan Smith
Co. of York, Pa., and designed to deliver 165 horsepower
each when running under 9 ft. of head (see figure 3 above).
They were submerged and were mounted on a 6 in. floor
supported on I-beams 8 ft. below head water. The draft
tubes discharging from the turbines pass through the floor
and extend to the tailrace 2 ft. below.
The generator drive system connected eight turbines
through bevel gearing to a 71/2 in. diameter x 150 ft. long
horizontal drive shaft to supply motive power to the
generator through a flexible insulated coupling. The
horizontal drive shaft was mounted on bearings supported
by the wheel pit division walls. The vertical shaft from each
turbine carried a large bevel gear with hardwood teeth
which meshed with an iron bevel gear on the drive shaft
(see figures 4 and 5 above). The drive shaft consisted of
two sections, each driven by four turbines. By means of a
coupling, four or eight turbines could be used. The system
was governed by two Lombard Type B hydraulic governors,
one for each set of four turbines. Each governorcontrolled
3
Figure 5 - One of Eight Turbine Bevel
Gear Drives to Generator - 1898
only three turbines in each set with the fourth being
controlled manually. The hydraulic governors actuated a
series of gears which opened and closed each turbine's
gates.
Throughout the plant, the S.K.C. system of electrical
machinery (a brand name for the Stanley Electric
Manufacturing Company of Pittsfield, Mass.) was used. The
generator, a three-phase induction type with an output of
750 KW at 166 rpm, was wound to deliver 10,000 volts to
the line without use of step-up transformers. The efficiency
of this machine was claimed to be 93.5%. The generator
stood 10 ft-1 in. tall, weighed about 30 tons, and was divided
horizontally to allow access to the armature and field
windings for repairs. The machine was mounted on a pit
foundation, extending to bed rock, and the pit was
thoroughly grouted and plastered to keep out any high
water (see figure 6 below).
Figure 6 - Little Marguerite Fries Formally Starting
Idol's Generator on April 18, 1898
A 14 KW, four-pole Crocker-Wheeler machine, driven at
1,100 rpm by the generator drive shaft system, served as
the generator field exciter. It delivered current at 70 volts
and was large enough to excite the fields of two generators
of the type installed.
The switchboard, located in the generator room, consisted
of four white marble slabs forming a 21 in. square pillar 91/2
ft. tall with all live contacts within the pillar. Three high-
voltage, single-pole, single-throw switches were mounted
on the board. They were of the plug type with long handles
and a bayonet lock. The board also contained a generator
volt-meter and AC ammeter along with a voltmeter and
switch for the exciter circuit and the exciter field rheostat.
The generator field rheostat was suspended 18 inches
below the floor for space and ventilation reasons and was
controlled by a handle through the floor.
A lightning protection rack hung above the switchboard
in three vertical sections, each carrying a set of arrestors
and choke coil for each leg of the high-voltage circuit.
The station wiring ran beneath the floor. The high-voltage
wires were insultated for 25,000 volts and supported on
triple-petticoated porcelain insulators on horizontal cross
bars. They entered the switchboard by passing through the
floor at the base of the pillar. The three outgoing high-voltage
power lines left through the top of the pillar and connected
with the transmission lines running into Winston and Salem.
TRANSMISSION LINES, SALEM SUBSTATION,
AND CUSTOMER CIRCUITS
In October, 1897, crews began erecting the poles for the
131/4 mile long transmission line to the Salem substation.
Figure 7 - Construction Workers and Sunday Visitors
at Idol's During Final Days of Construction - 1898
White cedar poles measuring 36 ft. and 48 ft. in height were
used and 51/2 ft. to 6 ft. of the poles were sunk in the ground.
The poles were spaced 100 ft. apart, except at roadway
crossings where they were only 50 ft. apart. Each pole
carried three cross bars with the lower two carrying the
power circuit. That circuit consisted of three No. 1 .soft-
drawn, bare copper wires strung on No. 1 Imperial porcelain
insulators which were 6 in. tall and triple-petticoated. The
power lines, spaced 24 in. apart, formed an equilateral
triangle with the lower cross bar carrying two wires. All of
the initial power lines were on one side of the pole, leaving
the other side open for a future circuit. To overcome
problems caused by induction between the lines, the
triangle was twice rotated 1200, thus giving the triangle two-
thirds of a rotation enroute to Salem. The top arm had six
pins with the outer pair carrying an iron, barbed-wire ground
circuit. Every 1000 ft. this line was brought to ground
4
through a 1/2 in, galvanized pipe driven 10 ft. into the ground
at the base of the pole. The inner pins carried a telephone
circuit, which could be grounded in case of a storm. Every
mile a branch of the telephone circuit was brought down
a pole to within a few feet of the ground to allow
communications with either end of the circuit. The extra pins
on the crossbar were used to transpose the telephone circuit
every 500 ft.
The lines entered the Salem substation on the second
floor, with proper lightning protection, and passed to the
main bus bars on the first floor. With proper switches and
transformation, the lines were carried to the various service
points in Winston and Salem. They included: (1) Southern
Chemical Co. (fertilizer works), (2) Southside Cotton Mill
(textiles), (3) Winston-Salem Railway and Electric Co. (street
railway and lighting), (4) Fogle Brothers Shop (wood
working), (5) J. A. Vance Shop (metal working), and (6)
Arista Mill (textiles).
CUSTOMER POWER COST AND PLANT COST
Power was sold to customers by meter at a minimum charge
of 25 horsepower per year. For a 12-hour day the rate was
$20.00 per horsepower per year, while for a 24-hour day
the rate was $40 per horsepower per year.
Shortly after the plant opened the Yadkin River flooded,
causing Fries Mfg. and Power Co. to spend $30,000 to
lengthen the dam and increase protection of the
powerhouse. These additions raised the cost of the plant
to $155,000. Floods did not deter sightseers, who crowded
the roads to the site for months for see the new facility (see
figure 7 on page 4).
IDOL'S OPERATING STAFF
The idol's operating staff worked 12-hour shifts with about
six men on each shift. The crews' primary responsibility was
to clean debris from the trash racks with long-handled rakes.
At times they manned the rakes for 36 hours straight (see
figure 8 above).
IDOL'S EXPANSION AND CHANGES IN OWNERSHIP
With the plant operating at full capacity shortly after it
opened, plans were quickly made to incorporate the second
line of eight turbines and their generator into the system.
the precise date of this installation is unknown, but it is
believed to have occurred around 1903.
On June 25, 1913 Fries Mfg. and Power Co. was absorbed
by the Southern Public Utility Co., a forerunner of Duke
Power Co. and continued to provide power to the mills and
shops of Winston-Salem.
Duke Power Co. took over the operation in February 1914.
They replaced the original machinery with six Allis Chalmers
vertical, 54 inch, Francis-type turbines each of which
generate 300 horsepower and six Allis Chalmers 2,300 volt,
74 amp, 90 rpm, three-phase generators mounted directly
above each turbine. Each generator had its own
switchboard and the new main switchboard and exciter
were mounted in the wheel room. The generator room was
converted to a transformer room for step-up transformers
to increase line voltage for transmission to the Duke system.
Five units of this machinery, with some minor improvements
and modifications, remain in use today (see figure 9 above).
5
Figure 8 - Managers and Operating Personnel
at Idol's Powerhouse Doorway - 1907
Figure 9 - Allis Chalmers Generators Installed in 1914
are in Operation Today
ABOUT ASME LANDMARKS
Idol's Hydroelectric Generating Station is the eighth
Regional Mechanical Engineering Landmark to be
designated since the program began in 1973. Since then
sixteen International and seventy-one National Landmarks
have been recognized by the Society. Each represents a
progressive step in the evolution of mechanical' engineering
and each reflects its influence on mankind.
The Landmarks Program recognizes our technological
heritage and serves to encourage the preservation of the
physical remains of historically important works. It provides
an annotated roster for engineers, students, educators,
historians, and travelers and helps establish persistent
reminders of where we have been, where we are, and
where we are going along the divergent paths of discovery.
The Carolina Section gratefully acknowledges the efforts of
all who participated in the Landmark designation of Idol's
Hydro, particularly: (1) Dr. Patrick W. O'Bannon, Historian
and the Historic American Engineering Record of the
National Park Service whose report provided the basis for
the nomination; (2) "American Electrician," Vol. X, No. 10,
Oct. 1898 (figure 3); Bill East, City Editor, "Twin City
Sentinel" (fro.ntpiece and figures 8 and 9); and Old Salem,
Inc. (figures 2, 4, 5, 6, and 7); who provided photographs
of Idol's facilities and equipment from their files; and (3)
Duke Power Co., whose information & staff cooperation,
assistance, and approval made the nomination possible.
The American Society of Mechanical Engineers
George Kotnick, P. E. - President
Dr. Theodore G. Brna - Vice-President, Region IV
Sylvan Cromer - Chairman, History and Heritage
Committee, Region IV
The ASME National History and Heritage Committee
Dr. R. Carson Dalzell - Chairman
Robert M. Vogel - Sec. (Curator, Smithsonian Inst.)
Dr. Robert B. Gaither, (Mech. Engrg. Dept., Univ. of Fla.)
Prof. Richard S. Hartenberg, (Mech. Engrg. Dept.,
Northwestern Univ. Tech. Inst.)
Dr. J. Paul Hartman, (College of Engineering, Univ. of
Central Fla.)
Dr. Merritt Roe Smith, (Massachusetts Institute of
Technology)
The Carolina Section of ASME
J. Ron Weston, Chairman
M. Keith.. Farris, Vice-President
Houston M. Smith, Secretary
David W. Newsome, Treasurer
William B. Crane, Chairman - History and Heritage
Committee
REGIONAL LANDMARKS
• Paige Compositor (1877)
Hartford, Conn. - designated 1975
• Allis Chalmers Water Pump Driven by Corliss Steam
Engine (1917)
Jacksonville, Fla. - designated 1976
• _ Chestnut Street Pumping Station Steam Engine (1913)
Erie, Pa. - designated 1980.
• Grave Mill (1852)
Hensdale, III. - designated 1980
• Corliss Cross-Compound Pumping Engine (1925)
York, Pa. - - designated 1982
• Reed Gold Mine Stamp Mill (1895)
Cabarrus County, N. C. - designated 1983
• Archimedes Wind-Powered Screw Pump (1890)
San Mateo, Ca. - designated 1984
• Idol's Hydroelectric Generating Station (1898)
Forsyth County, N. C. - designated 1984
REGIONAL HISTORIC
MECHANICAL ENGINEERING LANDMARK
IDOL'S HYDROELECTRIC GENERATING STATION
1898
FORSYTH COUNTY, NORTH CAROLINA
This run-of-the-river plant is an excellent example of
late nineteenth century small-scale (750 KW) low-head
hydroelectric power technology. The Idol's Station was
the first commercial hydroelectric plant in N. C.
involving long distance power transmission and Idol's
was an important power source for transportation,
lighting and industry in the Winston-Salem area, 14
miles distant. The original 1898 equipment was
replaced in 1914 and the facility continues to serve
the people of this region.
THE AMERICAN SOCIETY OF
MECHANICAL ENGINEERS
CAROLINA SECTION
1984
Figure 10 - Idol's Landmark Plaque
6
State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary C E H N F=`
A. Preston Howard, Jr., P.E., Director
December 29, 1997
Mr. J. Charles Ahlrichs
Northbrook Carolina Hydro
225 W. Wacker Dr.
Suite 2330
Chicago, IL 60602
Dear Mr. Ahlrichs,
Re: Certification Pursuant to Section 401 of the Federal Clean Water Act,
Proposed Idols Hydroelectric project
WQC Project #970983
Forsyth/Davie Counties
Attached hereto is a copy of Certification No. 3171 issued to Northbrook Carolina
Hydro dated December 29, 1997.
If we can be of further assistance, do not hesitate to contact us.
ely,
Yti
estop
PP
Howard, 0 E.
Attachments
970983.wgc
cc: Wilmington District Corps of Engineers
Corps of Engineers Raleigh Field Office
Winston-Salem DWQ Regional Office
... _.:. . _.. d
.11 Mr. John Parker, Division of Coastal Management
Central Files
Mark Serosky; Forsyth County Parks and Recreation
Joe Mickey; WRC
Steve Reed; DWR
Division of Water Quality • Environmental Sciences Branch
Enviro. Sciences Branch, 4401 Reedy Creek Rd., Raleigh, NC 27607 Telephone [phone] FAX # [phone]
An Equal Opportunity Affirmative Action Employer • 50% recycled/10% post consumer paper

NORTH CAROLINA 401 WATER QUALITY CERTIFICATION
THIS CERTIFICATION is issued in conformity with the requirements of Section
401 Public Laws 92-500 and 95-217 of the United States and subject to the North Carolina
Division of Water Quality (DWQ) Regulations in 15 NCAC 2H, Section .0500 to operate
the Idols hydroelectric plant on the Yadkin River in Forsyth/Davie Counties pursuant to an
application filed on the 12th day of November 1997 to Northbrook Carolina Hydro.
The application provides adequate assurance that the discharge of fill material into the
waters of Yadkin River in conjunction with the proposed development will not result in a
violation of applicable Water Quality Standards and discharge guidelines. Therefore, the
State of North Carolina certifies that this activity will not violate the applicable portions of
Sections 301, 302, 303, 306, 307 of PL 92-500 and PL 95-217 if conducted in accordance
with the application and conditions hereinafter set forth.
This approval is only valid for the purpose and design that you submitted in your
application, as described in the Public Notice or as modified below. If you change your
project, you must notify us and you may be required to submit a revised application. If
total wetland fills for this project (now or in the future) exceed one acre, compensatory
mitigation may be required as described in 15A NCAC 2H .0506 (h) (6) and (7). For this
approval to be valid, you must follow the conditions listed below. In addition, you should
get any other federal, state or local permits before you go ahead with your project including
(but not limited to) Sediment and Erosion control, Coastal Stormwater, Non-discharge and
Water Supply watershed regulations.
Condition(s) of Certification:
1. Appropriate sediment and erosion control practices which equal or exceed those
outlined in the most recent version of the "North Carolina Sediment and Erosion
Control Planning and Design Manual" or thy; "North Carolina Surface Mining Manual"
(available from the Division of Land Resources in the DENR Regional or Central
Offices) shall be utilized to prevent exceedances of the appropriate turbidity water
quality standard (50 NTUs in all fresh water streams and rivers not designated as trout
waters; 25 NTUs in all lakes and reservoirs, and all saltwater classes; and 10 NTUs in
trout waters);
2. All sediment and erosion control measures placed in wetlands or waters shall be
removed and the natural grade restored after the Division of Land Resources has
released the project;
3. Measures shall be taken to prevent live or fresh concrete from coming into contact
with waters of the state until the concrete has hardened;
4. If any dredging is needed, the applicant shall seek additional written approval from
DWQ.
5. DWQ shall be notified in writing before any repairs to the dam structure are made.
6. The applicant shall continue discussion with Mr. Mark Serosky (Forsyth County
Parks and Recreation Dept.) regarding river access downstream of the dam.
p ?
Violations of any condition herein set forth shall result in revocation of this
Certification and may result in criminal and/or civil penalties. This Certification shall
become null and void unless the above conditions are made conditions of the Federal 404
and/or coastal Area Management Act Permit. This Certification shall expire upon expiration
of the 404 or CAMA permit.
If this Certification is unacceptable to you have the right to an adjudicatory hearing
upon written request within sixty (60) days following receipt of this Certification. This
request must be in the form of a written petition conforming to Chapter 150B of the North
Carolina General Statutes and filed with the Office of Administrative Hearings, P.O. Box
27447, Raleigh, N.C. 27611-7447. If modifications are made to an original Certification,
you have the right to an adjudicatory hearing on the modifications upon written request
within sixty (60) days following receipt of the Certification. Unless such demands are
made, this Certification shall be final and binding.
WQC #3171
This the 29th day of December 1997
DIVISION OF WATER QUALITY
Pee 4nnoo ward , Jr. P. .
To
r : AM
Date Time E3 PM
WHILE YOU WERE OUT
M .rr??Ac k ti al
of
Phone
Area Code Number Extension
TELEPHONED PLEASE CALL
CALLED TO SEE YOU WILL CALL AGAIN
WANTS TO SEE YOU URGENT
RETURNED YOUR CALL
Message ' " 7`-
AMPAD D'
EFFICIENCY' #23-006
To 1--c)
Date Time O AM
Q PM
WHILE YOU WERE OUT
M
of _
Phone L_) (0?
Area Code Number Extension
TELEPHONED PLEASE CALL
CALLED TO SEE YOU WILL CALL AGAIN
WANTS TO SEE YOU URGENT
RETURNED YOUR CALL
Message c " ` vc-?K
Operator
AMPAD ?- M-161
EFFICIENCY* #23-006
NORTHBROOK ENERGY, LLC
22525 SE Goth PIS
Issaquah, Washington 98027
Tel: [phone]
Fax: [phone]
FAX TRANSMITTAL
Date: December 15, 1997
From: J. Charles Ahlrichs
To: John Dorney, Division of Water Quality
[phone]
Subject: Draft Water Quality Certification
3 page(s) including this sheet
Message: I have no problem with caontaoting Forsyth County to discuss river access,
and in fact have already contacted both the County and WRC, Apparently, previous
discussions between Duke Power (the previous project owner), WRC and the County
addressed the potential for a 3-party arrangement whereby WRC. would be responsible
for funding, designing and oonstructing a small-craft ramp and parking area, the County
would be responsible for maintenance, and Duke would donate neoessary lands. We
will continue to discuss this matter with WRC and the County, however, the potential for
increased vandalism at the plant is a primary concern.
We have already complied with draft Certification condition #6 and request that
it be deleted from the Certification. Making reference to the issue in the cover letter
seems more appropriate. Our requested changes are attached.
Please call me if you would like to discuss this further.
Regards,
GuLym-
NC. a Q IJQ ENVSCI Fax.[phone]
State of Mvarth Carolina
Departrheot •.ot Erivironrnent,
Health acid Natural Resources
Division of Water quality
James S. Hunt, Jr., Governor
Wayrta McDevitt, Sacro.tery
A. Preston •1!iowaw, Jr., P.6., ENreater
Deeem . 1 997
t
Mr, J. Chants AWchs
Ncrtttbrovk C4IrOhU4..Kydm
225 W. Wesker Dr.
Suite 2330
Chicogo, IL 60M
Dec 11 197 11:04 P. 02/04
. 7r?' X?.
Dev Mr. Ahlrichs.
R8, CwMeation Pursuam to Section 401 of the Pederd Clew' Water Act,
PkTOW414ols Hydra' =trio project
Ngj?t 1?97{1983
Forsyddtavie counties
Attactred.bereto is y of Cenificatian No, 3171 issued to Northbrook Cate ina
Uydro dated Deoerub 1 1931.
If we can be of firth ; assist • . -do not hc9itilto to caotaCt uS.
Situatly,
A. PMIOn Mward. Jr. P.B.
Attachments 'A T GuG? avr.4 Coklr??r l of ?T1y+GA?oi?l
Wf?V +aAVt? 4Z"17 'V LojQrA[ f Mg. jAA¢.e eagY-'/
970N3,wgo Fo??,y t,-l t . YarL 04 {LrcG2 ?1 ? ? n 1?'
wiltnin?ton District o AZ` ?t?t CZ? U rr¢ A cCPS S
f Caps: oEn$in pt gcVS? •???i? T
Gores ortgineers Weigh Field po.a?1 tet t?t A o? ]'? .
WiASM SAteM DWQ Regionid Off= ;
Mr. Joan Dorney
Mr. Jahn. Puke r, Division of Coxgtal M agernmt
centiral, MOS
Mark Scinsky, Fotsyth County Forks aid Recreation
Joe 1Vliokey; WRC
Owlsw or watgr'Qual? - FjwImnmsrV4 Isncgs Branch
Enviro. $cisncos.br.inch-. 4401' Rset -C"k l ltalsigK NC 27807 Tilbphoroo $l D.733.17M .FtAX N 733.2950
An Equaxt•Oppdnunlty Afffrmath?a."on Employer - w%rwVclod/t0%pesr oa'nsumirpopor
NC DWQ WQ ENVSQ Fax:919-Ti-9969 Dec 11 '97 11:05 P.03a04
NORTH CAROLINA 401 WATER QUALITY CEl2' ERICATION'
TMS CEMMCATIM4 is issued in conformity with the rt quirements of Section
401 Public Laws 92-500 and 95-2?7 of tl!o C=anted States. sand. sarbjcct to the North Carotins
Division of 1;at?err Quality tDWQ'Regulatiprls in 15 NCAC.291, Sw&m .05„00 to operate
the Idols hydwdect iv plant;on the:Yadda River in Forey ?DDavie Cotuxties:pwscant to an
application filed on the 121h day of Nvvc6* 1997 to 1?To' brook CWinat Hydro.
The apPlicattian provides adequate.assumpm ftt the, discharge of Ml material into the
wareis.of Yadkin Riven in cota'attaedicM with zed alit` Prop? dt r?elapment wi11 not result in a
violation of applicable water lity Stander4 n7disrbarae guidelines. Th=fom, the
State of Notctlt ;Cturali?zta.CCtrti iaS *ot this 4ct3v ?'tv will got violate the apppl1icaple portions of
Sections :301, 302, 303; 06-; vn of PL 92- Ql0 and PL 9S:217 if:coriducied in accordance
with the atpplk-ation and 006ditionS-berbitr set forth.
This amoval ig only valid.foi,thc puxpc
application., as destaibed in the Fnblic Node(
protect, you must notify us. you ttaay be i
total .wetland fills1or this pr e . (tiovv or la l
mitigation nma be rrq%A.read as. de#t?ribcd in 1
approval to be valid, you must fellow tbe,col
get any other. tedeW, statte or local, p:,ernuts br
(but not limited to) Sediment and Erpsior, 00
Water Supply w?atcrshed t gtal,atacxiy.
and dcsig.n tbrat yoga W=Itted in your
as mod04" d blow. If you. eltatagg.e your
anted to sabmit ai *Ased atpplication. If
fulare) exceed aaa ac e, comper"tory
N'CAC 2A.0506-(b);'(6) maid (7). For this
tions .listed below. Im addid0n, you should
'c you go.a l3ead.wl* Your plita ect utcluding
Jl, Coastal:St yinw att r, Non-discharge and
Coadition(s) of Certification:
1. AP ate sediment, at>,ci;aivsivn t?p?roI ??rraacticra; wixich r.6al or exceed those
ou iced In the rased recenO'ersion of 69 "Nu4'tlt Cas+oliira 5eclirtaent.atnd Frooion
Control ]'Tanning and T*ngt W - nuasi" ? the "North. Ce m inaf S.udaee Mining Mulual"
(available.:from the Divlsie' n- of Land Resources in. the:AENR,Regiaasal air CaentraE
Offices) shall be mall; 4 to pftvent exceddancos of the -appFoprAtc to tdity Water
quality sttardard (50 NT-Us in all ftesb waster stret my and rivers nut dosagaatod as trout
waters; 25 NT°Us in all lakes and resmtvoirs, and all. sa?ltwaier classes; and. 10 NTUs in
trout waiters);
2. All se.&txxotnt and emsancontrol me aos plac?l,rn wetla?uls or waters shall be
removed: and the natural grads restored a?'ter the Division of Land Resources has
iclemed the prgject;
3. Meatsurc* shalt be token: to prevcnt lid or fresh cdaacrctc frxa cx ming into contact
with waters of the state'uhtil the coniretty has hattdenadi•
4. If any dredging is need,: the applicant shall seeit- addidoual written. approval f to
DWQ.
5.
to the dain structure are made.
The applicant shall aantact Mr. l lE Soro,?s3cy (ForaYth. Cutmt Py ark&
Recreation Dept.) to discuss I aICC = downstream of the damn.
L1 rot! -r.. ?
4eTI--
State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
Date z(II
A&4
AM? ?!Ll
[D EHNR.
Division of Water Quality
Environmental Sciences Branch
4401 Reedy Creek Road
Raleigh, N.C. 27607
FAX:[phone]
FAX TO: r? FAX NUMBER: 575'

FROM:
PHONE:
I NO. OF PAGES INCLUDING THIS SHEET: `1" I
RY zVC

Environmental Sciences Branch 4401 Reedy Creek Road Raleigh, North Carolina 27607
Telephone [phone] FAX # [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post consumer paper
MEMORANDUM PRINT NAMES:
Reviewer: ??.,o/?/cT?vrc/•?c?
C0: JOHN DORNEY WQ SUPV.. _
ENVIRONMENTAL SCIENCES BRANCH DATE: / 3 f
SUBJECT: WETLAND STAFF REPORT AND RECOMMENDATIONS
-',**EACH ITEM MUST BE ANSWERED (USE N/A FOR NOT APPLICABLE)
PERMIT YR: 97 PERMIT NO: 0000983 COUNTY: FORSYTH/DAVI
APPLICANT NAME: IDOLS HYDROELECTRIC
PROJECT TYPE: HYDRO POWER PERMIT TYPE: FERC
COE #: DOT #:
RCD_FROM _CDA: APP DATE_FRM_CDA: 11/12/97
REG OFFICE: WSRO
ZIVER AND SUB BASIN J: 030702
STREAM CLASS: WSIV
WL_IMPACT?: Y/ff)
WL_REQUESTED: N/,#
WL_SCORE M : N/If
MITIGATION?: Y/&
STR INDEX N0: 12-(92.5)
WL TYPE :- ?? Ut
WL ACR EST? : Y/N A?//V
WATER IMPACTED BY FILL?: Y/N IVIP
MITIGATION-TYPE: A114
MITIGATION SIZE: Alld DID YOU REQUEST MORE INFO?: Y(V)
IS WETLAND RATING SHEET ATTACHED?: Y/N A//w
HAVE PROJECT CHANGES/CONDITIONS BEEN DISCUSSED WITH APPLICANT?: Y/®
RECOMMENDATION (Circle One): ISSUE (EE/COND DENY
COMMENTS:
Z? ?45Ni1? 7"'+a? rieG 4yl;L. ? At L?CT 421-)'d, Jy ?y?giC.?, ?YQ&rS

3. ??(? (? O GhNI e h[? ?L1t? ?i?/I??'7T?II (?NYFLT //14/?c ?lIOSC N fifvrs 44. 6.
let for 1 0601 ?Nf ?ll.r?G rl\)er 4
&ID) 7Z7- a5??o
?c: Regional Office
Central Files A
'U O
r0'd -Jt,1Ol
1EMORANDUM PRINT NAMES:
Reviewer: 7.
JOHN DOR-NEY WQ SUPV.: _
ENVIRONMENTAL SCIENCES BRANCH DATE: i 3 1
?URJTCT: WFTL.AND STAFF REPORT AND RECOMMENDATIONS
***EACH ITEM M
PERMIT YR: 97
APPLICANT NAME: IDOLS
PROJECT TYPE: HYDRO
COE #:
RCD FROM CDA: APP
RF.G OFFICE: WSRO
UST BE ANSWERED (USE N/A FOR NOT APPLICABLE)
PERMIT NO: 0000983 COUNTY: FORSYTH/DAVI
HYDROELECTRIC
POWER PERMIT TYPE: FERC
DOT # :
DATE FRM CDA: 11/12/97
:IVER AND SUB BASIN #: 0?0702
STREAM CLASS: WSIV
WL_IMPACT?: Y/t)
WL_RF.QUESTF_D: A10i¢
WL_SCORE M : V?11
MITIGATION?: Y/&
MITIGATION-SIZE: Nl?
STR INDEX N0: 12-(92.5)
WL TYPE : ,? R ?t r
WL ACR EST? : Y/N W1iV
WATER IMPACTED BY FILL?: Y/N A1,14
MITIGATION-TYPE: lvi9
DID YOU REQUEST MORE INFO?: Y 0
IS WETL.ANrD RATING SHEET ATTACHED? : Y/N Wow
LIAVE PROJECT C]L NGES/CONDITIONS BEEN DISCUSSED WITH APPLICANT?: Y
RECOMMENDATION (Circle One): ISSUE SSUE/COND DR NY
COMMENTS:
0 Qct?i?G {??.' TCls ._•S•, tti/w.4L 0?+ NncJ
1 ??? 5Ne_ Y ?? T ,r r,.. N G iJa?? f ? lJ?}1 /Jr/or ?NA ??^ t /'{ 04 /'.r
3.? c12? ?. o?,r., a%? ? ?.. ??••'.,'?rc cbNf??? /yloril Ss? ??H l??s., f ? Ca .
?a?KS ?- 1(f c . tit G?r 1 O'?Otit- x.15 ?z??,nS rUGr ? t [cif ?PtJn s?s'h- ?r
t
727 -5??_ -
.C : Regional Office
Central Files
AJ
L66 T -fit 1-" ?Q
7-0 ' d 01 "l? I ;JNH911 lJ0?Jd 1.I : 60
NORTH CAROLINA
DEPARTMENT OF
EN VIF ONMENT, HEALTH
NATUIZAL RESOURCES
e??
1DEHNR
DIVISION OF WATER QUALITY
WINSTON-SALENT REGIONAL OFFICE
585 Waughtown Street
Winton-Salem, N.C. 27107
Phone: [phone]
Fax: [phone]
TO:??
FAX NUMBER: 1/ 9 7 3 3 - 99SJ ?3
FROM: -?• c Q/G??
DATE: / l Ism
Number of pages (including cover page)_ Z
COMMENTS: :SOLI

7

e*4i/

To'd 01 11HDI IJn;Jj 9T :f-In- b-4-, T-M-D3Q
WINSTON -SALEM JOURNAL
P.O. BOX 3159
WINSTON-SALEM, N.C. 27102-3159
TELEPHONE [phone]
.. LEGAL ADVERTISING INVOICE
12/04/97
STATE OF NC DEPT OF
ENVIRONMENT, HEALTH
AND NATURAL RESOURCES
4401 REEDY CREEK RD
RALEIGH NC 27626
BILLED ACCOUNT NO.- CLIENT NO.
970188329 970188329
CLIENT
S7STATE OF NC DEPT OF
FEDERAL TAX I.D. NO. 56-0936874
?RT D. O• D•
1/29/97 11/29/97 MAILED/JOHN DORNEY/NORTH CAROL 1 42.OL 71.40 1
FOR QUESTIONS ABOUT BILLING, CALL [phone]
'?kes?v'ED
1
??,?vrAt
$71.40
PLEASE RETURN THIS STUB WITH YOUR REMITTANCE
MAKE CHECKS PAYABLE TO - ADDRESS INQUIRIES TO:
PIEDMONT PUBLISHING COMPANY, INC.

NORTH CAROLINA
DIMON OF WATER QUALITY
"PUBLIC NOTICE is hereby given
i that Northbrook Carolina Hydro,
LLC. North Carolina, has applied to
the North Carortna Division of Water
Qua. for a Water Quality Certifica-
tion pursuant to Section 401 of the
Federal Clean Water Act and Water
Quality Commission rules in 15A
NORTH CAROLINA I NCAC 2B.0101, 15A NCAC 2B.0231

FORSYTH COUNTY. and 15A NCAC 2H.0500. The actm-
tooob btaiinaFeeder rg?gyypeguluatto-
FERC) license
i
i
C
on (
omm
ss
2585) at the existing Idols
AFFIDAVIT W PUBLICATION Hydroelectric Project on, the Yadkin
Rner in Forsyth and Davie Counties.
The public is Irn4led to comment on
the above mentioned application to
the Division of Water Quality. Pleass
refer to DWQ Project 4970963.
Comments shall be in writing and
Before the undersigned, a Notary Public of said County and State, duly ; la ° be ceived „r bye 17, 99,

commissioned, qualified, and authorized by law to administer oaths, personally Comments should be sent to N.C.
Division of Water Quality, Envrron-
appeared D.H. Stanfield, who being duly sworn, deposes and says: that he is mental sciences; Branch. 4Q1
=reek Road, Raleigh, North
hn
J
Att
ti
Controller of Piedmont Publishing Company, Inc., engaged in the publishing of a on:
o
en
Carolna 27607,
Dorr? e?y [phone] Fax: , (919)
733-8959. Acopy of ateapple t o
is on file
a
a
S
newspaper known as Winston-Salem Journal, published, issued and entered as e
m,
,,rJgVt.on S
treK Whinston-$
NC 27107, Winston-Salem Regional
second class mail in the City of Winston-Salem, in said county and State: that he offics, busies ho;,r'? during
authorized to make this affidavit and sworn statement: that the notice or other Ito era Jr.
a true copy of which is attached hereto, was published in
legal advertisement NC. Division of Water Quality
,
Winston-Salem Journal, on the following dates.
NOVEMBER 29, 1997
and that the said newspaper in which such notice, paper document, or legal
advertisement was published was, at the time of each and every such publication,
a newspaper meeting all the requirements and qualifications of Section 1-597 of
the General Statues of North Carolina and was a qualified newspaper within the
meaning of Section 1-597 of the general statues of North Carolina.
This 2 day of December, 1997
(signature of pe son making affidavit)
Sworn to and subscribed before me, this 2 day of December, 1997
Notary Public
My Commission expires: September 28, 2000 O
OFFICIAL SEAL
? ? L Notarj Public, North Caroi:na
COUN I Y QF FORSY
KIMALEY?, PN ON
My Commission Expires ?' _ : Jow0ho
FO • d -idi0i
MEMORANDUM PRINT NAMES :
Reviewer:
TO: 3???w frass?vessA uxe?trax W4 'p1iTl9 0
SUBJECT: WETLAND STAFF REPORT AND RECOMMENDA'T'IONS
***EACH ITEM MUST BE ANSWMM (USE N/A FOR NOT APPLICABLE) ***
PERMIT YR:
APPLICANT NAME.
PRO.7ECT_TYPE:
'60E #:
RCD FROM CDA;
REG.,,,OFFICE
97 PERMIT NO: 0000983
IDOLS HYDROELECTRIC
H"Ro POWER
APP
W5R0
COUNTY: FORSYTH/DAVI
PRRMIT TYPE: FERC
DOT,W# :
DATE_FAM CDA: 11/12/97
RIVEIt_AND-SUB-RASIN_# s 030702 STR_Imr,] Not 12-02.5)
STREA'NI CLASS i WSIV
WL_7MPACT?: Y/t
WL REQUES'TED : AJ.4
WL SCORE M ; ,/If
MITIGATION':: 'Y'10
MITIGATION SIZE:A114
WL TYPE : - va r
Wt. AC P. EST? n `i''/N A110
WATER IMPACTED BY FILL? YIN x11,4
MITIGATION TYPE: 1014
DID YOU REQUEST MORE INFO?: YN-)
IS WETLAND RATING SHUT ATTACHED?: Y/N Allf
HAVR ftOJECT CHANGES / CONDT TIONS BEEN DISCUSSED WITH APPLICANT?; Y
RECOMMENDATION (Circle One): ISSUE EE/CONK DENY
COMMENTS:
r
?s

Regional Office
Cantral Files

Z0'd 0i wai'eS"O-:?su'M NNH3C WONJ bT:60 L66T-80-03C
?. GL??*l eh? ? ff???r? l?icT Ql?tlOtf+C. ?rS ? ?.
:State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
Winston-Salem Journal
Post Office Box 3159
Winston-Salem, NC 27102
Attn: Legal Ad Department
Dear Sir:
Re: Public Notices
L7EHNF I
November 17, 1997
Please publish the attached Public Notice one time in the section set aside for Legal
Advertisements in your newspaper. The publication should run on or before November 24,
1997 Please send the invoice for publication and three copies of the affidavit of publication to the
address given below. Payment cannot be processed without the affidavit of publication.
N.C. Division of Water Quality
Water Quality Section
4401 Reedy Creek Road
Raleigh, NC 27607
Attn: John Dorney
If you have any questions concerning this matter, please call John Dorney at 919-733-1736.
Program
cc: John Dorney
Winston-Salem DWQ Regional Office
Central Files
Winston- S alempub
Division of Water Quality - Environmental Sciences Branch
4401 Reedy Creek Rd., Raleigh, NC 27626-0535 - Telephone [phone] • FAX [phone]
An Equal Opportunity Affirmative Action Employer50% recycled/ 10% post-consumer paper

NORTH CAROLINA DIVISION OF WATER QUALITY
PUBLIC NOTICE is hereby given that Northbrook Carolina Hydro, L.L.C. North Carolina, has
applied to the North Carolina Division of Water Quality for a Water Quality Certification pursuant
to Section 401 of the Federal Clean Water Act and Water Quality Commission rules in 15A NCAC
2B .0101, 15A NCAC 2B .0231 and 15A NCAC 2H.0500. The activity for this the certification
is sought is to obtain a Federal Energy Regulatory Commission (FERC) license (#2585) at the
existing Idols Hydroelectric Project on the Yadkin River in Forsyth and Davie Counties.
The public is invited to comment on the above mentioned application to the Division of Water
Quality. Please refer to DWQ Project #970983. Comments shall be in writing and shall be
received by the Division no later than December 12, 1997. Comments should be sent to N.C.
Division of Water Quality, Environmental Sciences Branch, 4401 Reedy Creek Road, Raleigh,
North Carolina 27607, Attention: John Dorney [phone] Fax: [phone]. A copy of
the application is on file at the Division office 585 Washington Street, Winston-Salem, NC
27107 Winston Salem Regional Office, Fax [phone] during normal business hours and may
be inspected by the public.
ston Howard, J .
birec or
N.C. Division of Water Quality
DATE: November 18,1997
l
v
97098s
ORIGINAL
November 4, 1997
John Dorney
NC Division of Water Quality
P.O. Box 29535
Raleigh, NC 27626-0535
Re: Idols Hydroelectric Project, FERC No. 2585
Application for Water Quality Certification
Dear Mr. Dorney:
Northbrook Energy, LLC
STS Hydropower, Ltd.
STS Turbine Design & Development, LLC
Northbrook Carolina Hydro, LLC
I herewith enclose an original and 6 copies of an application for Water Quality
Certification for the captioned project. If you have any questions, or require additional
information, please call me.
Ve truly yo rs,
. Charles Ahlrichs
Vice President
k; k.
P
®
??fi2f V.:) ,9-j
22525 SE 64th Place
Issaquah, WA 98027
425.557.3680/Fax [phone]
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ATTACHMENTS
Attachment 1: Project Location Map
Attachment 2: Project Description
Attachment 3: U.S. Fish & Wildlife Service Correspondence
Attachment 4: Department of Cultural Resources Correspondence
Attachment 5: 1997 Dissolved Oxygen Monitoring Results
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Idols Hydroelectric Project, FERC No. 2585
PROJECT DESCRIPTION
The Idols Hydroelectric Project is located in the State of North Carolina, Counties of
Forsyth and Davie, on the Yadkin River, about 15 miles southeast of Winston-Salem, North
Carolina, and approximately 4 miles southeast of Clemmons, North Carolina.
The Project is a constructed development that was originally placed in operation by the
Fries Manufacturing & Power Company in 1898 with 8 turbine-generating units. Duke Power
Company's predecessor, the Southern Public Utilities Company, purchased the project in 1913
and replaced the turbine-generating units with 6 units of larger capacity by 1914. On July 28,
1980, Duke Power Company was issued a minor license by the FERC, effective April 1, 1962 and
terminating on July 31, 2000. Applicant purchased the project from Duke Power Company in
December 1996.
All lands necessary to operate and maintain the project are owned by Applicant in fee. By
agreement between Applicant and the City of Winston-Salem, the City uses Yadkin River water
behind the Idols impoundment free of charge as the source of its auxiliary water supply.
Briefly described, the Project consists of (1) a long, low head, stone masonry dam across
the river channel that diverts a portion of the river's flow into a powerhouse located on the, east
bank; and (2) a powerhouse containing inlet works, turbines, generators and transmission
equipment. Flows from the powerhouse discharge to a long tailrace before returning to the main
river channel. No major modifications to the Project have been made since the previous FERC
license application filed by Duke Power Company in 1966, and no additions or alterations are
proposed as part of this application.
ATTACHMENT 3
U.S. FISH & WILDLIFE SERVICE CORRESPONDENCE
11
Duke Power Company
P.O. BOX 1006
Charlotte, NC 28201-1006
DUKE POWER
March 8, 1996 -
Ms. Linda Gantt, Field Supervisor
US Department of the Interior
US Fish and Wildlife Service
Division of Ecological Services
P.O. Box 33726
Raleigh, NC 27636-3726
Attention: Mr. John Ellis
Re: Idols Hydroelectric Project
FERC Project No. 2585
Planning Meeting
File: GAH-404
Dear Mr. Ellis:
A meeting was held on February 12, 1996 for the purpose of obtaining clarification of
agency comments received on the Idols First Stage Consultation Report. The following
entities were in attendance:
• Duke Power Company (DPC)
• North Carolina Department of Environment, Health and Natural Resources,
Division of Water Resources (NCDWR)
• North Carolina Wildlife Resources Commission (NCWRC)
• United States Fish and Wildlife Service (USFWS)
Enclosed are two attachments. Attachment 1 contains a list of agency representatives in
attendance. Attachment 2 summarizes the discussion and clarifications obtained during
the meeting.
Printed on recycled paper
March 8, 1996
Page 2
Duke Power appreciates the opportunity to discuss these issues. If you have any
questions, please call either me at [phone], or Duane Harrell [phone].
Sincerely,
!F'? -
E. K. Robinson, Senior Engineer
Engineering, Licensing and Resource Management
ESS Environmental Division
EKR/sbm:EKR25
cc w/attach: R. D. Harrell
K. P. Mack
W. J. McCabe
E. M. Oakley
Central Records

ATTACHMENT 1
FEBRUARY 12, 1996 MEETING ATTENDANCE
NAME AGENCY
Joe Mickey NCWRC
Dave Buckmeter NCWRC
John Ellis USFWS
Steve Reed NCDWR
Fred Tarver NCDWR
Chris Goudreau NCWRC
Stephanie Goudreau NCWRC
Duane Harrell DPC
Eileen Robinson DPC
Ron Punch DPC
ATTACHMENT 2
SUMMARY
References:
- Division of Water Resources November 16, 1995 Letter
- North Carolina Wildlife Resources Commission October 31,
1995 Letter
- United States Fish and Wildlife Service December 15, 1995
Letter
Clarification on Agency Comments:
1. Documentation is desired on how Duke Power ensures that
Idols Reservoir doesn't go below the Winston Salem water
intake level.
2. Include calculations in the documentation showing the
amount of-time-fnr the project to fill and spill, beginning
with a two foot drawdown and a 7Q10 flow. If the reservoir
is capable of filling and spilling in 2 hours or less under
those conditions (two foot drawdown and 7Q10 flow) then that
will help determine if the project approximates run-of-
river operation and help resolve downstream flow concerns.
It is also desired that Duke calculate how far the reservoir
could be drawdown in a 2 hour time under a 7Q10 flow
condition.
3. It was suggested that Duke plot the USGS gage-readings
above and below the project during the low flow season. If
these plots indicate that the flow readings follow the-same
relative pattern, then that will help resolve any downstream
flow concerns and help demonstrate that Idols has an
approximate run-of-river operation.
4. If the screening and flow criteria stated in the NCWRC
correspondence under the impingement and entrainment issues
is not met, then. an assessment of the entrainment potential
and a calculation of the entrainment mortality potential,
based on turbine blade contact, will be an acceptable
approach to resolve the entrainment issue.
5. There is a need to determine the functionality of the
fish ladder. If the applicant will verify that the fish
ladder is non-functional, then the issue of upstream fish
passage can be closed. .
r
United States Department of the Interior
FISH AND WILDLIFE SERVICE
5 Raleigh Field Office
ell Post Office Box 88726
ligh, North Carolina 27656-8726 iggs December 15, 1995

Mr. E.M. Oakley, Senior Engineer
Environmental Engineering
ESS Environmental Division
Duke Power Company
P.O. Box 1006
Charlotte, NC 28201-1006
Dear Mr. Oakley:
Thank you for your July 31, 1995, letter requesting comments on the First Stage Consultation
Report for Idols Hydroelectric Project (FERC #2585) and the invitation to the September 19,
1995, meeting regarding the relicensing of this project. The U.S. Fish and Wildlife Service
(Service) has reviewed the Report. These comments are provided in accordance with provisions
of the Fish and Wildlife Coordination Act (48 Stat. 401, as amended; 16 U.S.C. 661 et seq.),
Section 7 of the Endangered Species Act of 1973, as amended (16 U.S.C. 1531-1543) and the
Federal Power Act, as amended (16 U.S.C. 791a-825r).
The Idols Hydroelectric Project, located on the Yadkin River in Forsyth County, consists of a
low head, rubble masonry dam and a wooden powerhouse. The project functions in an
approximate run-of-river mode with project operation based on a daily inspection by an operator
who evaluates if the water level is suitable for production without impacting the City of Winston
Salem's water supply intake. The impacts of the approximate run-of-river mode vs. a true run-
of-river mode is of concern to the Service. It is our understanding that at times, no spill over
the dam occurs. Under this flow regime, the only flow entering into the bypassed reach is from
leakage; water passing through the fish ladder; water entering from Carter's Creek, or backflow
from the tailrace. Duke Power may need to conduct an instream flow study to determine the
requirements for flow within the bypassed reach. A site visit was scheduled for November 15,
1995, to observe the project during low flow conditions, but was canceled due to the lack of
suitable conditions. The Service is willing to participate and would appreciate prior notification
of a future site visit.
The Project contains a fish ladder at the midpoint of the spillway. At the September 19, 1995,
?. meeting and site visit, the operator stated that shad, presumably gizzard shad, (Dorosoma

ce ianum) and white bass r n h? r, sV ODS) use the fish ladder. Duke Power should evaluate
the ladder to determine the species that use the ladder and to what degree. Additionally the now
required in order for the fish ladder to function effectively, as well as length of time this flow
exists during spawning periods for the species of fish found to be utilizing the ladder should be
determined. _

The Report mentions that the Project contains a trashrack, however there is no information
regarding bar width, spacing, or flow velocity at this point. Inclusion of this information would
be useful in evaluating the potential for fish impingement and entrainment.
Another point of discussion at the September 19, 1995 meeting was the need to enhance public
access to the Yadkin .River, Duke Power wished to discuss this topic at a later date. Currently
there is a canoe portage area around the Project's dam. The Service affirms the importance of
promoting quality wildlife experiences for all of our nation's citizens. To further this goal, the
Service would like to see Duke Power investigate ways to enhance public use of the Project
area.
Once again, thank you for the opportunity to provide comments on this project. We look
forward to working further with Duke Power in the relicensing process for the Idols
Hydroelectric Project. If you have any questions, please feel free to contact myself, or John
Ellis at the above address, or at [phone], ext. 26.
Sincerely,
&UM Axo,,?
Cherry Green
Acting Supervisor
FWS/R4:JEllis:JEE:12-15-95:919-856-4520 ext. 26:B:ID0ISIST
UK
Duke Power Company
Electric Center
P.O. Box 1006
Charlotte, NC 28201-1006
DUKE POWER
July 31, 1995
Ms. Linda K. Gantt, Field Supervisor
U.S. Department of the Interior
U.S. Fish and Wildlife Service
Division of Ecological Services
P.O. Box 33726
Raleigh, NC 27636
Re: Idols Hydroelectric Project
FERC Project No. 2585
Duke Power Company
First?Stage Consultation Report
File No: GAH-0404
Dear Ms. Gantt:
1
Please find attached one copy of Duke Power Company's First Stage
Consultation Report for.the Idols Hydroelectric Project. This
report complies with the requirements-and guidelines of 18 C.F.R.
16.8 and is submitted in conjunction with the "Unequivocal
Statement of Intent to File an Application for New License by
Duke Power Company" dated July 25, 1995.
Sincerely,
D. Cook Jr. Manager
Planning/Analysis/Licensing
ESS Environmental Division
TLH/sh:tlh8
Attachment
cc: Central Records
Printed on recycled paper
Duke Power Compam
PO. Bar 1006
Chmlotte, NC28201.1006
(I DUKE POWER
May 16, 1996
Ms. Linda Gantt, Field Supervisor
US Department of the Interior
US Fish and Wildlife Service
Division of Ecological Services
PO Box 33726
Raleigh, NC 27636-3726
Attention: Mr. John Ellis
Re: Idols Hydroelectric Project
FERC Project No. 2585
Study Plans
File: GAH-404
Dear Mr. Ellis:
On February 12, 1996, Duke Power Company (DPC), the North
Carolina Department of Environment, Health, and Natural
Resources, Division of Water Resources (NCDWR), the North
Carolina Wildlife Resources Commission (NCWRC), and the
United States Fish and Wildlife Service (USFWS) met to
clarify agency comments on the Idols First Stage
Consultation Report. Information and study proposals are
enclosed based on the agreements of the February 12 meeting,
as outlined in the March 8, 1996, meeting summary.
The enclosed study plans and information should address
concerns regarding low flow conditions, fish ladder
functionality, dissolved oxygen monitoring, entrainment
assessment, downstream flow and approximate run-of-river
operation.
Duke Power requests that following your review of the
enclosed information and plans, that you acknowledge your
acceptance in writing.
Sincerely,
E.K. Robinson, Senior Engineer
Engineering, Licensing and Resource Management
ESS Environmental Division
Page 2
May 16, 1996
cc w/attach: R.D. Harrell
K.P. Mack
W.J. McCabe
E.M. Oakley

IDOLS HYDROELECTRIC PROJECT
STUDY PLANS AND INFORMATION
Low Flow Demonstration
Low flow demonstrations planned for earlier this year were
canceled due to high flow conditions. This demonstration
will be rescheduled during late May to early June 1996, when
flow conditions are more conducive to simulating a low flow
scenario. Duke Power Company will consult with NCDRR,
NCWRC, and USFWS personnel to reschedule this demonstration.
Fish Ladder Functionality
The USFWS requested verification relative to the
functionality of the fish ladder at the Project. The
applicant is not aware of any current or historical
utilization of the spillway fish ladder for upstream passage
at the Project. The only Yadkin River--species that might
benefit from upstream passage at the Project would be the
striped bass during upstream spawning migration.
In the late 1980's, the NCWRC investigated the feasibility
of establishing a self-sustaining striped bass population in
the Yadkin River. Upstream passage at the Project was a
consideration of this study. After conducting field surveys
of water velocities in potential striped bass spawning and
nursery areas, the NCWRC concluded that water velocities
were either inadequate or marginal to suspend striped bass
eggs and fry for successful propagation. Additionally,
research revealed that there were no documented cases where
fish ladders were utilized by striped bass. The NCWRC
concluded there was little likelihood of establishing a
self-sustaining population of striped bass within the Yadkin
River, and that the enhancement of the striped bass
population within the Yadkin River system may be
accomplished with alternative management methods.
Dissolved Oxygen Monitoring
The NCDWR, NCWRC, and USFWS have expressed concerns about
the dissolved oxygen levels in the bypass reach during the
low-flow period of the year. To address these concerns,
dissolved oxygen levels and water temperatures in the bypass
reach just downstream of the spillway will be monitored
during July-September 1996. Data will be collected with
Hydrolab Datasonde II® units installed in the bypass reach.

The exact monitoring location and placement
II units will be determined during the low
demonstration scheduled during May or June
of the Datasonde
flow
1996.
Two Datasonde II units will be placed in the bypass to-begin
data collection on July 1, 1996. The two units will be.
placed in the same location to ensure continuous data
collection in the-event one of the units malfunctions. The
units will be programmed to collect data every 15 minutes.
With this frequency of data collection, the batteries in
each unit should provide nine consecutive days of operation.
To ensure uninterrupted data collection, however, both units
will be swapped out with new units every seven days. The
units will be returned to the laboratory where the data will
be downloaded, and the units will be cleaned, recalibrated,
and the batteries recharged for redeployment the following
week. This procedure will be repeated each week of the 3-
month study period.
The data collected over the 3-month study period will be
analyzed to provide hourly.averages for dissolved oxygen-
(ppm) and water temperature (C). These data will be used to
determine diurnal and diel dissolved oxygen patterns in the
bypass reach during the-low-flow period of the year. The
results of this study will be summarized and reported to the
NCWWR, NCWRC, and the USFWS.
Assessment of Entrainment
The NCWRC and the USFWS have both expressed concerns about
fish entrainment and mortality at the Project. The NCWRC
criteria for water intakes establish the maximum intake rack
bar spacing and water velocity as 2.5 in and 1.5 fps,
respectively. If these criteria can not be met for the
Idols Hydroelectric Project, then specific studies must be
conducted to address entrainment and entrainment mortality.
Due to the configuration of the powerhouse and the resulting
difficulty in conducting definitive entrainment studies,
both NCWRC and the USFWS have agreed that an assessment of
the entrainment potential and a calculation of the
entrainment mortality potential will be an acceptable
approach to address this issue. This approach is consistent
with the approach used for the Spencer Mountain
Hydroelectric Project.
Intake Velocity Determinations
The first step in addressing the entrainment issue will
consist.of an evaluation of the intake velocities and trash
rack spacing at the Project to determine consistency with
the NCWRC screening and flow criteria. Intake velocities
will be determined by measuring velocities just upstream of
the trashrack of each operating unit under four-unit
operation. Due to the inclination of the trashracks,
velocity will be measured along a transect parallel to-the
intake, approximately 2 m upstream of the trashracks. A
rope will be stretched across the intake at this point to
allow measurements to be taken from a boat. The 16-ft
diameter opening for each unit will be divided into 3-ft
wide vertical strips, for a total of five strips per unit.
A Marsh-McBirneyo Model 201 flowmeter will be used to
measure velocity at 0.2 and 0.8 of the water depth within
each vertical strip. Velocity data will be summarized
separately for individual units and collectively for all
units. These data will be submitted to the NCWRC and USFWS
for their review.
Entrainment/Mortality Potential
If the trash rack spacing and intake velocities at the
Project exceed the NCWRC criteria, an assessment of the
entrainment potential and a calculation of the entrainment
mortality potential will be conducted. The assessment of
entrainment potential will consist of an electrofishing
evaluation of fish densities in the forebay of the Project
impoundment. The forebay fishery will be sampled with boat-
mounted electrofishing equipment. The shoreline and near-
shore area on the powerhouse side of the river will be
sampled from the intake to just upstream of the railroad
bridge (150-m transect). Sampling will be conducted during
late May to early June, when fishes should be concentrated
in the near-shore area. All collected fishes will be
identified to species, measured for total length (mm), and
released. Data will be summarized to provide a qualitative
and quantitative (catch-per-unit-of-effort) assessment of
the forebay fishery.
The assessment of the entrainment mortality potential at the
Project will be conducted by calculating the probability
that an entrained fish will be struck by a turbine blade as
the fish passes through the Project's turbines. The
probability will be calculated using Von Raben's formula
(Cada 1990), based on fish size, turbine characteristics,
runner speed, and discharge. The evaluation will be
conducted for the range of species and sizes of fishes
collected during the forebay fish survey mentioned above.
The application of this formula will be the same as that
used for a similar determination at the Spencer Mountain
Hydroelectric Project. These data will be summarized to
provide an assessment of the entrainment mortality potential
for the species of fishes that would most likely be
entrained. These data and the forebay fish survey data will
be the basis for determining if there is a potential
entrainment/mortality problem at the Project.
Downstream Flow and Approximate Run-of-River Operation
It was suggested that Duke plot USGS gage readings above and
below the project during low flow season. If these plots
indicate that the flow readings follow the same relative
pattern, then that will help resolve any downstream flow
concerns and help demonstrate that Idols has an approximate
run-of-river operation. Enclosed are plots of USGS gage
readings above (Enon Gage: drainage area = 1694 square
miles) and below (Yadkin College Gage: drainage area = 2280
square miles) the project during the low flow season. The
plots are historical daily mean flows from July 1 to
September 30 for the following years: 1980 - 1986; 1989 -
1991; and 1993. The data for the Enon gage for 1987 and
1992 and the data for the Yadkin College gage for 1988
during desired months was not included in the source of data
used, and therefore is not presented in this report.-
Also enclosed is the calculation showing the amount of time
for the Project to fill and spill, beginning with a two foot
drawdown and a 7Q10 flow. It was discussed on February 12,
1996 that if the reservoir is capable of filling and
spilling in 2 hours or less under 7Q10 conditions, then that
will help determine if the project approximates run-of-river
operation and help resolve any downstream flow concerns.
References
Cada, Glenn F. 1990. Assessing fish mortality rates.
Hydro Review, February, 1990,"pp. 52-60.
Calculate the amount of time for the project to fill and spill,
beginning with a two foot drawdown and a 7Q10 inflow.
7Q10 = 582 cfs (Ref. Section 5.2 in First Stage Consultation Report)
Impoundment Surface Area = 35 acres (Ref. Section 2.3 in First Stage
Consultation Report).
Drawdown = 2 feet
Fill and Spill Time =( x Sacr 1 x 43560 t-'/ acre = 1.45 hours
582 ft/sec x 3600 sec/hr
Calculate the amount of drawdown in the reservoir assuming a 7Q10
outflow and zero inflow over a 2 hour period.
2hrs x 582 ft'/cap- x 36o0 sec/hr = 2.75. feet
35 acres x 43560 ft / acre --

YADKIN RIVER 1980
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® North Carolina Wildlife Resources Commission
512 N. Salisbury Street, Raleigh, North Carolina 27604-1188, 919-733-3391
Charles R. Fullwood, Execa dve Director
June 21, 1996
Ms. E. K. Robinson Senior Engineer
Engineering, Licensing and Resource Management
ESS Environmental Division ,
Duke Power Company
P. O. Box 1006
Charlotte, NC 28201-1006
SUBJECT: Study Plans for Idols Hydroelectric Project
FERC Project No. 2585
Dear Ms. Robinson:
This correspondence responds to a request by you for our review of Duke Power
Company's proposed study plans at the Idols Hydroelectric Project. The North Carolina Wildlife
Resources Commission is authorized to comment and make recommendations which relate to the
impacts of this project on fish and wildlife through the Federal License of Water Resource
Project Act (Federal Power Act-16 U.S.C. 791a et seq.), and the Fish and Wildlife Coordination
Act (48 Stat. 401, as amended; 16 U.S.C. 661-667d).
We find the study plans acceptable as written for the sections on low flow demonstration,
fish ladder functionality, and dissolved oxygen monitoring.
We recommend that the second paragraph under the subtitle Entrainment/Mortality
Potential within the section on assessment of entrainment be modified. At present, this section
states that fish sampling data will be used to calculate entrainment mortality potential by using
Von Raben's formula. Depending on the results of fish sampling upstream of the intake, we may
recommend that a site-specific mortality study be conducted. The presence of target species such
as federal or state listed species, certain game species, or critical nongame species would drive
our recommendation as to how to calculate a mortality estimate. In the absence of target species,
we would likely agree to using Von Raben's formula to estimate entrainment mortality potential.
We have discussed the section pertaining to downstream flow and approximate run-of-
river operation with personnel of the North Carolina Division of Water Resources (DWR). We
?Z:OF45?e 40Z
Idols Hydro Page 2 6/21/96
are not able to determine whether the operation of Idols Hydroelectric Project approximates run-
of-river or not using the gage information provided by Duke Power Company. We defer to
comments provided by the DWR in a memorandum to you dated 20 June 1996 for the method to
be used for making this determination.
Thank you for the opportunity to review and comment on these study plans. If you have
any questions regarding these comments, please contact Ms. Stephanie Goudreau at 704/652-
4257.
Sincerely,
Franklin T. McBride, Manager
Habitat Conservation Program
cc: Mr. Steve Reed, DWR
Mr. John Ellis, USFWS

State of North Carolina.
Department of Environm(
Health and Natural Resc?q
Division of Water Resources II II
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secreta
John N. Morris, Director
JUN 2 5 1996
DUKE POWER COM.FANY
;:{? Elsyir; iztnQttta! M.
June 20, 1996
Mr. E.K. Robinson, Senior Engineer
ESS Environmental Division
Duke Power Company
P.O. Box 1006
Charlotte, NC 28201-1006
RE: Idols Hydroelectric Project
FERC Project No. 2585
Study Plans
Dear Mr. Robinson:
Fr7G{2b mg v3. PC,u
MIA
FE F1
The Division of Water Resources (DWR) has reviewed the Study Plans and Information
Report for the relicensing of the Idols Hydroelectric Project, received May 20, 1996. The DWR
do not have any comments on the sections of the report dealing with fish ladder functionality,
dissolved oxygen monitoring, or the assessment of entrainment. Our primary concerns are related
to downstream flows and how project operations might impact those flows and their uses.
The fill and spill calculations provided appear to be correct. These show that with a two-
foot drawdown and a 7Q10 inflow, if the project went off line it would spill in about an hour and
a half and return to run-of-river downstream. These calculations were to assist in determining
what level of drawdown might be acceptable but do not directly relate to whether the project
approximates run-of-river operation.
The DWR also reviewed the U.S. Geological Survey (USGS) gage data provided in the
report. These hydrographs show daily mean flows at the Yadkin College and Enon USGS gages
on the Yadkin River. We can not determine from these records of daily mean flows whether the
operation of Idols Hydro approximates run-of-river or not. We recommend plotting hourly flow
data for both gages for shorter periods (two weeks) during the low flow months of July through
October. An evaluation for these low flow periods from 1991 through 1996 should be made.
This evaluation should include hourly plots for the same time period of the water withdrawn by
Winston-Salem from Idols for water supply and the city's wastewater discharge to downstream
tributaries.
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post-consumer paper

Letter to E.K. Robinson
Page 2
June 20, 1996
Please contact me when the low flow demonstration in the bypassed reach is rescheduled.
If you have any questions or need additional information regarding these comments, you may
contact me at 919-715-5424.
Sincerely,
(f. e-Q-?
Steven E. Reed
Environmental Supervisor
cc: Mr. John Sutherland, DWR
Ms. Stephanie Goudreau, WRC
Mr. Chris Goudreau, WRC
Ms. Ruth Swanek, DEM
Mr. John Ellis, USFWS
United States Department of the Interior
FISH AND WILDLIFE SERVICE
Raleigh Field Office
-TFORMI r1
59 Post Office Box 33726
"t r high, North Carolina 27636.3726
a June 18, 1996
JUN 2 41996
DUKE POWER CGiNAPANY
ESS Einvironn:ental Div.
Mr. E.K. Robinson, Senior Engineer
Engineering, Licensing, and Resource Management
ESS Environmental Division
Duke Power Company ,cf T? DEL o !
P.O. Box 1006
Charlotte, NC 28201-1006
Dear Ms. Robinson:
Thank you for your May 16, 1996, letter providing the study proposals for the Idols
Hydroelectric Project (FERC #2585). The plans are based on discussions of the February 12,
1996, meeting as outlined in the March 8, 1996, meeting summary. The U.S. Fish and Wildlife
Service has reviewed the study plans and finds them acceptable. Once again, thank you for the
opportunity to provide comments on this project. We look forward to working further with
Duke Power in the relicensing process for the Idols Hydroelectric Project. If you have any
questions, please feel free to contact me, or John Ellis at the above address, or at (919) 856-
4520, ext. 26.
Sincerely,
John M. Hef r
Supervisor
FWS/R4:JEllis:JEE:6-13-96:919-856-4520 ext. 26:B:IDOLSCNC
State of North Carolina
Department of Environ R..
Health and Natural Res
Division of Water Quality
JU 2 21996
James B. Hunt, Jr., Govern rDUKe POWER COMP
Jonathan B. Howes, Secre SS environmental
A. Preston Howard, Jr., RE,- Director

July 17, 1996
E. K. Robinson, Senior Engineer
Duke Power Company
ESS Environmental Division
P.O. Box 1006
Charlotte, NC 28201-1006
Subject: Idols Hydroelectric Project
FERC Project No. 2585
D.O. Monitoring Study Plan
Davidson Co.
Dear Mr. Robinson:
k74JOAL
EHNF=1
?FkD.S Pe r
After reviewing the Idols First Stage Consultation Report the Division has expressed
concerns about the location of the dissolved oxygen (D.O.) monitoring stations described
in the report. Two NPDES permitted facilities discharge treated wastewater within the
Carters Creek watershed. Since Carters Creek joins the Yadkin River immediately
downstream of the spillway, the Division recommends that the D.O. monitoring station be
relocated downstream of the spillway within the bypass reach. .
Duke Power has responded to the Division's concerns by proposing a study plan to
continuously monitor D.O. and temperature within the bypass reach. The Division has
reviewed and approves of the study plan submitted on May 16, 1996. Since the low flow
demonstration has been postponed twice, the proposed three month data collection period
will have to be shifted back in time compared to the time period outline in the study plan.
An appropriate starting time can be discussed during the low flow demonstration scheduled
for July 18; 1996.
Sincerely,
Andrew McDaniel Jr., Environmental Modeler
NC Division of Water Quality
cc: Steve Reed, DWR
Michelle Suverkrubbe, Planning Branch
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post-consumer paper
United States Department of the Interior
FISH AND WILDLIFE SERVICE
Raleigh Field Office
Post Office Box 53726
Nigh, North Carolina 27636-3726
I131-JUN 2 41996 June 18, 1996
DUKE POWER COMPANY
ESS Environmental Div-
Mr. E.K. Robinson, Senior Engineer
Engineering, Licensing, and Resource Management
ESS Environmental Division
Duke Power Company ?;,etd TD DEL o
P.O. Box 1006
Charlotte, NC 28201-1006
Dear Ms. Robinson:
Thank you for your May 16, 1996, letter providing the study proposals for the Idols
Hydroelectric Project (FERC #2585). The plans are based on discussions of the February 12,
1996, meeting as outlined in the March 8, 1996, meeting summary. The U.S. Fish and Wildlife
Service has reviewed the study plans and finds them acceptable. Once again, thank you for the
opportunity to provide comments on this project. We look forward to working further with
Duke Power in the relicensing process for the Idols Hydroelectric Project. If you have any
questions, please feel free to contact me, or John Ellis at the above address, or at (919) 856-
4520, ext. 26.
Sincerely,
)'John M. Hef r
Supervisor
FWS/R4:JEllis:JEE:6-13-96:919-856-4520 ext. 26:B:IDOLSCNC
ATTACHMENT 4
DEPARTMENT OF CULTURAL RESOURCES CORRESPONDENCE
99
Duke Power Company
Electric Center
P.O. Box 1006
Charlotte, NC 28201-1006
DUKE POWER
July 31, 1995
Mr. William S. Price, Jr., Director
Division of Archives and History
N.C. Department of Cultural Resources
109 East Jones Street
Raleigh, NC 27611
Re: Idols Hydroelectric Project
FERC Project No. 2585
Duke Power Company
First Stage Consultation Report
File No: GAH-0404
Dear Mr. Price:
1
Please find attached one copy of Duke Power Company's First Stage
Consultation Report for the Idols Hydroelectric Project. This
report complies with the requirements and guidelines of 18 C.F.R.
16.8 and is submitted in conjunction with the "Unequivocal
Statement of Intent•to File an Application for New License by
Duke Power Company" dated July 25, 1995.
Sincerely,
D. G. Cook, Jr., Manager
Planning/Analysis/Licensing
ESS Environmental Division
TLH/sh:tlh8
Attachment
cc: Central Records
Printed on recycled paper
T L H
North Carolina Department of Cultural Resources JUG""`"
James B. Hunt, Jr., Governor Division of Archives and History
Betty Ray McCain, Secretary William S. Price, Jr., Director
August 22, 1995
D. G. Cook Jr., Manager
Planning/Analysis/Licensing
ESS Environmental Division
Duke Power Company
Electric Center
P.O. Box 1006
Charlotte, N.C 28201-1006
Re: Idols Hydroelectric Project, Forsyth County,
FERC Project No. 2585, First Stage Consultation
Report, File No. GAH-0404, ER 96-7199, CH
96-E-0000-0155
Dear Mr. Cook:
AUG2 8 1995
DUKE POWER COMPANY
Generation Services Dept.
We have received information concerning the above project from the State
Clearinghouse, as well as your letter of July 31, 1995.
The Idols Hydroelectric Plant (Fries Manufacturing and Power Company) was placed
on the North Carolina state study list on April 8, 1982, for potential nomination to
the National Register of Historic Places. The power plant is eligible for listing under
Criterion A for social history for its role in the development of the town of Winston
and Salem (Winston-Salem) into a significant manufacturing and industrial center,
and Criterion C for its engineering. It has been recognized by the American Society
of Mechanical Engineers as a regional historic mechanical engineering landmark.
We understand Duke Power intends to file an Application for New License, and is
not at this time proposing any structural changes to. the historic plant. We have
determined the issuance of a new license will' have no effect. upon the historic
plant. If any plans for structural changes are developed in the future we will need
to review the plans under Section 106 of the National Historic Preservation Act for
compliance with the Secretary of the Interior's Standards and Guidelines. We are
pleased the Idols Hydroelectric Plant will continue to be used for its historic purpose
of generating electricity.
The above comments are made pursuant to Section 106 of the National Historic
Preservation Act and the Advisory Council on Historic Preservation's Regulations
for Compliance with Section 106 codified at 36 CFR Part 800.
109 East Jones Street - Raleigh, North Carolina 27601-2807
Thank you for your cooperation and consideration. If you have questions
concerning the above comment, please contact Renee Gledhill-Earley, environmental
review coordinator, at 919/733-4763.
sincerely,
David Brook
Deputy State Historic Preservation Officer
DB:slw
cc: FERC, Washington, DC
State Clearinghouse
Forsyth County Joint Historic Preservation Commission
46
%Wsb
November 4, 1997
Andrew McDaniel Jr., Environmental Modeler
NC Division of Water Quality
P.O. Box 29535
Raleigh, NC 27626-0535
Re: Idols Hydroelectric Project, FERC No. 2585
Dissolved Oxygen Monitoring Pro, ,gram
Dear Mr. McDaniel:
Northbrook Energy, LLC
STS HydroPower, Ltd.
STS Turbine Design & Development, LLC
Northbrook Carolina Hydro, LLC
We have completed the dissolved oxygen monitoring program for the Idols Project.
The results are provided herein.
Background
During first stage consultation for relicensing the Idols Project, the Division of Water
Quality requested that the relicense applicant ("Applicant") implement a monitoring program to
determine dissolved oxygen levels in the bypass reach during low flow periods of the year.
The data would be used by DWQ and other agencies to evaluate the suitability of summer
water quality conditions in the bypass reach for fishery and waste assimilation purposes under
the current (and proposed) mode of project operation.
Applicant complied with this request by using continuous recorders to collect data at
15 minute intervals from July 1 through September 30, 1996. Unfortunately, above-average
river flows precluded evaluating the bypass under "worst-case" conditions, hampered the
deployment and retrieval of monitoring equipment, resulting in extended periods with no data
collection, and greatly affected the accuracy of the data through progressive fouling of the
sensor membrane. After reviewing the data, Applicant and DWQ determined: (1) the data was
not suitable for use in addressing the objectives of the monitoring program, and (2) a revised
monitoring program comprising the use of a hand-held meter to take measurements twice daily
would be better suited to the goals of the monitoring program.
Measurement Procedures
Dissolved oxygen, water temperature and depth of water over the dam were measured
during the period June 26 through September 30, 1997. The DO and temperature
measurements were made in the morning and evening of each day using a YSI® Model 55
hand-held meter. The meter probe was attached to an extension pole and placed
approximately V below the water surface immediately downstream of the dam at the northeast
end (see Attachment 1). Probe membranes were changed every two to three weeks.
Calibration was assured through the use of the built-in calibration chamber.
22525 SE 64th Place
Issaquah, WA 98027
425.557.3680/Fax [phone]
Andrew McDaniel Jr.
November 4, 1997
Page 2
Results
River conditions this year were ideal for the purposes of our program. Exceptionally
low flows resulted in several consecutive days in August and September when no flows passed
over the dam. We were able to confirm that water backs up to the base of the dam under all
conditions and we were able to measure the effects on DO levels during prolonged periods
when no water is passing over the dam.
The data, provided in both tabular and graph form in Attachment 2, is consistent with
data gathered in the project vicinity in 1994: DO levels are relatively high, typically above 8
mg/l, and show a slight diurnal trend, with levels generally higher in the morning than those in
the evening. We also found that DO levels dropped during periods when no flow passed over
the dam. However, the reductions were relatively modest, presumably due to moderating
effects of dam leakage and tailwater recirculation within the bypass reach.
Please provide any comments you may have as soon as possible. If you have any
questions, or require additional information, please feel free to call me.
Very truly you s,
r
Charles Ahlrichs
Vice President
cc: Steven E. Reed, Environmental Supervisor
NC Division of Water Resources
P.O. Box 27687
Raleigh, NC 27611
John M. Hefner, Supervisor
U.S. Fish & Wildlife Service
Division of Ecological Services
P.O. Box 33726
Raleigh, NC 27636-3726
Franklin T. McBride, Manager
NC Wildlife Resources Commission
Habitat Conservation Program
512 N. Salisbury Street
Raleigh, NC 27604-1188

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Idols Hydroelectric Project
1997 DISSOLVED OXYGEN MONITORING
Morning Reading
D.O. Temp HW Level
Date Time
:
;
> (mgA)
;:: (°C) (ft)
26-Jun-97 :
::
8:10 8.38 22.5 100.6
27-Jun-97 ? 8:03 8.39 22.1 100.7
28-Jun-97 8:35 8.37 22.0 100.5
29-Jun-97 7:40 8.39 22.1 100.5
30-Jun-97! 8:05 8.41 22.3 100.5
1-Jul-97 8:15 8.38 22.3 100.5
2-Jul-97 8:20 8.32 22.0 100.6
3-Jul-97 8:12 8.38 22.4 100.5
4-Jul-97? 8:30 8.41 23.1 100.4
5-Jul-97 8:45 8.30 22.6 100.4
6-Jul-97 < 8:10 8.34 22.4 100.3
7-Jul-97 8:22 8.39 22.5 100.3
8-Jul-97'> 8:15 8.33 22.7 100.2
9-1u1-97 8:21 8.27 22.9 100.1
10-Jul-97 8:07 8.29 22.8 100.2
11-Jul-97 8:18 8.21 22.9 100.1
12-Jul-97 9:45 8.23 22.9 100.2
13-Jul-97:.,,, 7:00 8.29 22.6 100.2
14-Jul-97::':: 8:09 8.27 23.2 100.1
15-Jul-97 8:15 8.12 23.4 100.0
16-Jul-97 9:20 7.95 24.3 100.0
17-Jul-97:: 8:35 8.00 24.3 100.2
18-Jul-97 8:34 8.15 23.6 100.2
19-Jul-97:: 7:00 8.19 23.3 100.1
20-Jul-97:.:.: 10:15 8.19 23.4 100.4
21-Jul-97 8:35 8.22 23.7 100.3
22-Jul-97:" 8:20 8.20 23.5 100.2
23-Jul-97 8:13 8.27 23.7 100.2
24-Jul-97. 8:45 8.29 22.9 101.4
25-Jul-97 ': 8:18 8.32 22.7 101.4
26-Jul-97 8:14 8.31 22.8 101.7
27-Jul-97:>: 8:00 8.22 23.5 101.3
28-Jul-97.. 8:40 8.27 23.6 100.5
29-Jul-97:: 8:47 8.33 22.8 100.7
30-Jul-97 8:17 8.27 22.8 101.3
31-Jul-97:....
8:26
8.27
22.9
101.4
1-Aug-97:..:..: 8:16 8.31 22.7 101.3
2-Aug-97 8:00 8.33 22.4 101.1
3-Aug-97 8:15 8.41 21.3 101.1
4-Aug-97: 8:45 8.11 22.0 101.1
5-Aug-97 8:39 8.37 21.8 101.3
6-Aug-97:::: 8:40 8.47 21.4 101.4
7-Aug-97. 8:32 8.39 21.2 100.8
8-Aug-97' 8:32 8.28 22.3 100.7
9-Aug-97.,... 9:55 8.13 23.5 100.7
10 Aug-97 11:00 8.22 22.7 100.7
11-Aug-97 9:10 8.27 22.6 100.7
12-Aug-97::;: 9:30 8.10 23.4 100.6
13-Aug-97;; 8:05 8.12 23.2 100.5
14-Aug-97 7:45 8.19 23.3 100.5
15-Aug-97 8:13 8.11 23.4 100.5
16-Aug-97'.-
9:36
8.15
23.5
100.5
17-Aug-97 8:00 8.02 23.6 100.4
18-Aug-97 6:00 8.09 23.4 100.2
19-Aug-97
9:45
7.99
23.7
100.2
20-Aug-97.-
9:00
8.05
23.5
100.2
21-Aug-97:.,:.: 6:45 8.11 23.3 100.3
Afternoon Reading
Dam Spill D.O. Temp HW Level Dam Spill
(in) Time (mgA) CC) (ft) (in)
7 4.50 8.39 22.9 100.6 7
8 4:30 8.29 22.4 100.7 8
6 5:50 8.39 22.0 100.5 6
6 5:16 8.40 22.3 100.5 6
6 4:55 8.41 22.5 100.5 6
6 4:30 8.40 22.7 100.6 7
7 4:57 8.42 22.6 100.6 7
6 4:31 8.43 23.1 100.5 6
5 4:35 8.38 22.6 100.9 11
5 5:00 8.10 22.6 100.4 5
4 5:06 8.26 22.7 100.2 2
4 5:16 8.33 22.9 100.3 4
2 4:45 8.21 23.3 100.1 1
1 4:57 8.25 23.4 100.1 1
2 5:10 8.28 23.2 100.1 1
1 5:10 8.20 22.7 100.1 1
2 5:00 8.21 22.5 100.2 2
2 4:30 8.23 23.1 100.2 2
1 5:07 8.20 23.3 100.0 0
0 4:35 7.99 23.9 100.0 0
0 4:03 7.86 24.6 99.0 0
2 5:15 8.01 24.1 100.3 4
2 4:15 8.13 23.5 100.3 4
1 4:05 8.16 23.6 100.3 4
5 4:35 8.17 23.8 100.3 4
4 4:51 8.13 24.0 100.2 2
2 4:37 8.17 23.5 100.2 2
2 4:39 8.23 23.1 101.5 18
17 4:50 8.22 23.2 101.4 17
17 4:48 8.29 23.0 101.4 17
20 5:00 .8.31 23.0 101.7 20
16 4:45 8.39 23.5 101.9 23
6 4:30 8.19 23.7 100.5 6
8 4:25 8.22 23.2 100.9 11
16 4:20 8.27 23.0 101.4 17
17 4:35 8.30 23.0 101.3 16
16 4:50 8.29 23.0 101.2 14
13 4:15 8.38 22.5 101.1 13
13 4:01 8.35 22.3 101.1 13
13 4:18 8.44 21.7 101.1 13
16 4:20 8.32 22.3 101.2 14
17 4:17 8.40 21.7 100.9 11
10 4:25 8.31 22.4 100.7 8
8 4:35 8.25 23.2 100.7 8
8 2:35 8.14 23.4 100.7 8
8 4:15 8.20 22.7 100.7 8
8 3:35 8.17 23.4 100.6 7
7 4:36 8.18 23.1 100.5 6
6 4:50 8.15 23.2 100.5 6
6 4:07 8.12 23.4 100.5 6
6 8:36 8.11 23.5 100.5 6
6 4:31 8.05 24.0 100.5 6
5 6:45 8.12 23.6 100.2 2
2 6:50 8.02 24.0 100.3 4
2 8:30 7.96 24.0 100.2 2
2 6:30 7.98 23.8 100.3 4
4 6:35 8.00 23.7 100.3 4
Page 1
Idols Hydroelectric Project
1997 DISSOLVED OXYGEN MONITORING
Morning Reading Afternoon Reading
D.O. Temp HW Level Dam Spill D.O. Temp HW Level Dam Spill
Date Time (mg/l) (°c) (ft) (in) Time (mg/1) (°c) (ft)
.
. (in)
..
. : .
..:
:
:

22-Aug-97
6:38
8.11
23.2
100.2 .:...........
2 ..... ..: : , ::: r:...
7:05
8.02 . ;. ....
23.6 :;.::.:..:;;:
.
100.2
.
.
.
.
.....
2
23-Aug-97 6:50 8.17 23.1 100.1 1 5:40 8.06 23.5 100.1 1
24-Aug-97 7:05 8.05 23.4 100.0 0 6:28 8.02 23.7 100.0 0
25-Aug-97::::;::: 6:50 8.02 23.8 100.1 1 6:02 7.97 24.3 99.9 0
26-Aug-97 6:55 8.08 24.5 100.0 0 6:15 7.97 25.0 99.8 0
27-Aug-97.::,
6:19
8.03
24.9
99.9
0
5:45
7.93
25.2
100.1
1
28-Aug-97 6:03 7.98 25.0 100.1 1 5:50 7.92 25.0 100.0 0
29-Aug-97::: 6:20 7.95 24.9 100.0 0 5:38 7.90 25.4 99.9 0
30-Aug-97,:.:., 5:45 7.88 25.1 100.0 0 6:05 7.85 25.3 99.9 0
31-Aug-97; 8:05 7.89 25.1 100.1 1 7:00 7.91 25.2 100.1 1
1-Sep-97 7:15 7.94. 24.8 99.8 0 6:05 7.91 25.0 99.9 0
2-Sep-97::i 7:06 7.90 24.7 100.0 0 5:35 7.88 25.1 100.0 0
3-Sep-97 6:40 7.97 24.5 100.1 1 5:39 8.01 25.0 99.9 0
4-Sep-97 ` 6:20 7.92 24.3 100.0 0 5:42 7.92 24.4 100.1 1
5-Sep-97:'. 7:18 7.90 23.9 99.9 0 6:37 7.89 24.4 100.0 0
6-Sep-97 7:23 7.92 24.1 99.8 0 6:00 7.85 24.2 99.7 0
7-Sep-97::: 6:20 7.89 23.9 99.8 0 6:07 7.90 24.2 99.9 0
8-Sep-97:.... 7:07 7.89 23.7 100.0 0 5:45 7.83 23.9 100.0 0
9-Sep-97 6:43 7.91 24.0 100.0 0 6:13 7.91 24.0 100.1 1
10-Sep-97 7:07 8.05 23.3 100.2 2 6:40 7.93 23.6 100.7 8
11-Sep-97 6:48 8.22 22.5 100.5 6 6:30 8.16 23.0 100.6 7
12-Sep-97:: 6:00 8.30 22.3 100.8 10 7:45 8.31 22.6 100.5 6
13-Sep-97; 7:30 8.26 22.4 100.6 7 6:15 8.25 22.6 100.4 5
14-Sep-97;:,:": 7:30 8.41 22.1 100.6 7 8.28 22.6 100.6 7
15-Sep-97 6:00 8.29 21.9 100.4 5 9:50 8.34 22.1 100.3 4
16-Sep-97: 7:05 8.33 21.4 100.4 5 7:15 8.34 21.8 100.4 5
17-Sep-97''.:' 6:37 8.38 21.1 100.4 5 7:05 8.32 21.5 100.5 6
18-Sep-97 6:40 8.39 21.0 100.4 5 6:30 8.35 21.6 100.4 5
19-Sep-97 6:00 8.36 20.8 100.4 5 10:45 8.39 21.1 100.4 5
20-Sep-97:: 8:15 8.43 20.9 100.4 5 7:15 8.37 21.5 100.4 5
21-Sep-97: 7:05 8.40 21.1 100.4 5 6:30 8.36 21.5 100.5 6
22-Sep-97""
6:30
8.33
21.2
100.4
5
6:10
.8.38
21.1
100.4
5
23-Sep-97:: 6:42 8.38 21.1 100.5 6 5:40 8.40 21.0 100.4 5
24-Sep-97:: 6:45 8.41 20.9 101.0 12 5:40 8.40 21.0 101.2 14
25-Sep-97: 6:40 8.42 20.8 100.8 10 6:00 8.42 20.7 100.8 10
26-Sep-97::'' 5:50 8.44 20.8 100.6 7 8.45 20.8 100.5 6
27-Sep-97 5:20 8.37 20.7 100.5 6 8.43 21.0 100.5 6
28-Sep-97:..:.. 7:15 8.41 20.9 100.4 5 7:05 8.41 21.1 100.4 5
29-Sep-97: 6:45 8.40 20.9 100.4 5 6:30 8.43 21.0 100.5 6
30-Sep-97:: 7:05 8.45 20.8 100.5 6 5:00 8.40 20.9 100.5 6
Page 2
Dissolved Oxygen and Temperature Data
July 1997
Dissolved Oxygen Levels
10.0
9.5
9.0
c
8.5
C
c
8.0
7.5
7.0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Day
Temperature
26.0
25.0
24.0
U

ft? m
23.0
a
E
d
22.0
21.0
20.0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Day
Dissolved Oxygen and Temperature Data
August 1997
Dissolved Oxygen Levels
10.0
9.5
9.0
c
8.5
d
c
8.0
7.5
7.0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Day
Temperature
26.0
25.0
24.0
U_
d
23.0
E
d
22.0
21.0
20.0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Day
Dissolved Oxygen and Temperature Data
September 1997
Dissolved Oxygen Levels
10.0
9.5
9.0
8.5
d
d
8.0
7.5
7.0

Morning ',
• Evening
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Day
Temperature
26.0
25.0
24.0
U_
d
23.0
E
w
F-
22.0
21.0
20.0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Day

N < 49
e?
® North Carolina Wildlife Resources Commission5l
512 N. Salisbury Street, Raleigh, North Carolina 27604-1188, 919-733-3391
Charles R. Fullwood, Executive Director
MEMORANDUM
TO: John R. Dorney, Division of Water Quality
Dept. of Environment and Natural Resources
FROM: Joe H. Mickey, Jr., Western Piedm nt Region Coordina or
Habitat Conservation Program ??.
DATE: December 3, 1997
SUBJECT: DWQ ID No. 970983. Review of an application by Northbrook Carolina Hydro,
LLC, for the Idols Hydroelectric Project, FERC License No. 2585, Forsyth
County.
Northbrook Carolina Hydro, LLC is requesting 401 Water Quality Certification from the
North Carolina Division of Water Quality. The NCWRC has reviewed information provided by
the applicant, and field biologists on our staff are familiar with habitat values of the project area
and a site visit was conducted on December 3, 1997. These comments are provided in
accordance with provisions of the Clean Water Act of 1977 (33 U.S.C. 466 et. seq.) and the Fish
and Wildlife Coordination Act (48 Stat. 401, as amended; 16 U.S.C. 661-667d).
We have no objection to the issuance of 401 certification for this project. The applicant
has satisfactorily addressed our concerns on levels of dissolved oxygen in the by-pass reach
(1997 data) and entrainment/mortality issues (9/97).
There had been some concern about the functionality of the fish ladder. To the best of
our knowledge, there has been no historical documentation that the fish ladder has ever been
used by fish for upstream passage. Based on results of a 1988 NCWRC titled Survey of
Ictalurid Populations in the Upper Yadkin and South Yadkin Rivers, we concluded that
Idols Dam was a breaking point on the river between flathead catfish and bullhead catfish
populations. The dam effectively blocked upstream migrations of flathead catfish, preserving the
abundant native bullhead fishery above the dam from elimination through predation by flathead
catfish. -

Mr. Dorney
Idols Project
2
12/3/97
One issue that the applicant might want to look into is providing fishingiboating access to
the river somewhere below the dam on the their property. Public access to the river is limited at
this location and this area can receive heavy fishing pressure during the springtime spawning
runs of striped bass, white bass and white perch from High Rock Lake. In the past, the NCWRC
and Forsyth County Parks and Recreation Department had been in contact with the former owner
of Idols Dam, Duke Power Company, about providing some public access at the site. If
Northbrook Carolina Hydro, LLC is interested in pursuing this issue, I suggest they contact Mr.
Mark Serosky, Director, Forsyth County Parks and Recreation, 500 W. Fourth St., Suite 103,
Winston-Salem, NC 27101, phone [phone], or me.
Thank you for the opportunity to review and comment on this project. If you have any
questions regarding these comments, please contact me at 910/366-2982.
cc: John Thomas, USACOE
Ron Linville, DWQ/WSRO
J. Charles Ahlrichs, Northbrook Energy, LLC
Mark Serosky, FCP&R
Northbrook Carolina Hydro, LLC RECEIVED
TELEPHONE CONVERSATION NOTES o j CI,z 1991
ENVIRONMENTALSCIENCES
Date: September 26, 1997
Time: 10:20
From: Chuck Ahlrichs
To: Melba McGee, Office of Legislative Affairs (919) 7154194
Subject: Idols Hydroelectric Project Relicensing
I called, pursuant to John Dorney's recommendation, to determine whether there are any outstanding
state issues that would preclude John's issuance of a Section 401 Water Quality Certification.
Ms. McGee reviewed the file and stated that the State Clearinghouse has released our project and no
further action is required by her office. The Division of Water Quality is free to act on our request
for Water Quality Certification once we submit our application.
copy: Melba McGee, OLA
John Dorney, DWQ
To
V ?AM
Date [h - r) Time ?U ?PM
WHILE YOU -WERE OUT
R p
Phe Numbers ? Telephoned
Office -6 5 3 l6 ? Please call
Area Code Number Ezt
Voicemail ? Returned your call
FAX ? Called to see you
Pager ? Wants to see you
Mobile ? Will call again
e-mail ? URGENT
Message
AMPAD Operator Reorder
""" EFFICIENCY® #23-005

NORTHBROOK ENERGY, LLC
22525 SE Goth Place
Issaquah, Washington 98027
Tel: [phone]
Fax: [phone]
FAX TRANSMITTAL
Date: September 29, 1997
!From: Chuck Ahirichs
To: John Dorney, Div. of Water Quality
[phone]
Subject: Idols Hydro Project
Application for Water Quality Certification
25 page(s) Including this sheet
Message: As we discussed, I am faxing this draft application for your completeness
review. Let me know if I should also include correspondence with the
Division of Water Quality, Division of Water Resourcos and the Wildlife
Resources Commission.
Regards,

?r<
4::?klurx.'

Ck
P(O
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71
via
Duke Paw CmWany
vafic Center
P.O. Bar 1006
ewak IYCMI.1006
DUKCS POWFA
July 31. 1995
Mr. William S. Price. Jr.. Director
Division of Archives and History
N.C. Department of Cultural Resources
109 East Jones Street
Raleigh, NC 27611
Re! idols Hydroelectric Project
FERC Project No. 2585
Duke Power Company
First stage Consultation Report
File No_ CAR-0404
1
Dear Mr. Price:
Please find attached one copy of Duke Power Company's Firat Stage
qW Consultation Report for the Idols Hydroelectric Project. This
report complies with the requirements and guidelines of 18 C.F.R.
16.8 and is submitted in conjunction with the "Unequivocal
Statement of Intent to File an Application for New License by
Duke Power Company" dated July 25, 1995.
Sincerely,
D. G. Cook, Jr,, Manager
Planning/Analysis/Licensing
ESS Environmental Division
TLH/ sh : tlh8
Attachment
cc; Central Records
p1mled o^ WKW rawer
TLN
ETC
North Carolina Department of Cultural Resources
Jsa B. Hunt, Jr., Govermor
Be q Ray iv eWn, Secretxy
August 22, 1995
D. G. Cook Jr., Manager
Planning/Analysis/Licensing
ESS Environmental Division
Duke Power Company
Electric Center
P.O. Box 1046
Charlotte, N.C 28201-1006
Re: Idols Hydroelectric Project, Forsyth County,
FERC Project No. 2585, First Stage Consultation
Report, File No. OAH-0404, ER 96-7199, CH
96-E-0000-0155
Dear Mr. Cook,
Owls o of AMAwn o d History
William S. Price, Jr., Dkwor
AUG 2 81995
DUKE POWER COMPANY
Gmeration Services Dept.
We have received information concerning the above project from the State
Clearinghouse, as well as your letter of July 31, 1995.
The Idols Hydroelectric Plant (fries Manufacturing and Power Company) was placed
on the. North Carolina state study list on April 8, 1982, for potential nomination to
the National Register of Historic Places. The power print is eligible for listing under
Criterion A for social history for its role in the development of the town of Winston
and Salem (Winston-Salem) into a significant manufacturing and industrial center,
and Criterion C for its engineering. It has been recognized by the American Society
of Mechanical Engineers as a regional historic mechanical engineering landmark.
We understand Duke Power intends to file an Applicstion for New Licenso, and is
not at this time proposing any structural changes to, the-historic plant. We have
deter-mined the issuance of a new license will' have no effect upon 'the historic
plant. If any plans for structural changes are developed in the future we will need
to review the plans under Section 106 of the National Historic Preservation Act for
compliance with the Secretary of the interior's Standards and Guidelines. We are
pleased the Idols Hydroelectric Plant will continue to be used for its historic purpose
of generating electricity.
The above comments are made pursuant to Section 106 of the National Historic
Preservation Act and the Advisory Council on Historic Preservation's Regulations
for Compliance with Section 106 codified at 30 CFR Part 800.
Thank you for your cooperation and consideration, if you have questions
concerning the above comment, please contact Renee Gledhill-Earley, environmental
review coordinator, at 919/733-4763.
Sincerely, -
4r -
Devid Brook
Deputy State Historic Preservation Officer
DB:slw
cc: FERC, Washington, DC
State Clearinghouse
Forsyth County Joint Historic Preservation 'Commission
11
Oak fbmsr anlpany
Pa RAY /006
cnardoft A V2=14006
DUKEPOMR
March 8, 1996
Ms. Linda Gantt, Field Supervisor
US Department of the Interior
US Fish and Wildlife Service
Division of Ecological Services
P.O. Box 33726
>Etaleigh, NC 27636-3726
Attention: Mr. John Ellis
Re: Idols Hydroelectric Project
F'ERC Project No. 2585
Planning Meeting
File: GAH-404
Dear Mr. Ellis:
A meeting was held on February 12, 1996 for the purpose of obtaining clarification of
agency comments received on the Idols First Stage Consultation Report. The following
entities were in attendance:
• Duke Power Company (DPC)
• North Carolina Department of Environment, Health and Natural Resources,
Division of Water Resources (NCDWR)
• North Carolina Wildlife Resources Commission (NCWRQ
• United States Fish and Wildlife Service (USFWS)
Enclosed are two attachments. Attachment 1 contains a list of agency representatives in
attendance. Attachment 2 summarizes the discussion and clarifications obtained during
the meeting.
ft0don 1M-,'M d PWW
March 8, 1996
Page 2
Duke Power appreciates the opportunity to discuss these isaaas. if you have any
questions, please call either me at [phone], or Duane Harrell [phone].
Sincerely,
IF'e
E. IC. Robinson. Senior Engineer
Engineering, Licensing and Resource Management
ESS Environmental Division
EKR/sbm:EKR25
cc w/attach: R. D. Harrell
K P. Mack
W. J. McCabe
E. M. Oakley
Central Records

ATTACHhCM 1
FEBRUARY 12 1996 MEETING ATTENDANCE
NAME
Joe Mickey
Dave Buckmeter
John Ellis
Steve Reed
Fred Tarver
Chris Goudreau
Stephanie Goudreau
Duane Harrell
Eileen Robinson
Ron Punch
AGENCY
NCWRC
NCWRC
U5FWS
NCDWR
NCDWR
NCWRC
14CWRC
DPC
DPC
Drc
ATTA cmaktV 2
SUNII?1A1tY
References:
Division of Water Resources November 16, 1995 Letter
- North Carolina wildlife Resources CoanaisaiOn October 31,
1995 Letter
- United States Fish and Wildlife service December 15, 1995
Letter
Clarification on Agency Comments:
S a l emensures
wate hat
1 Documentation
do e s n* t l godb e i owo t1? euWi ns t onPower
zdo l
intake level.
2. Include calculations in the documentation showing the
amount of'--rime- for the-project to fil.1 and shill, beginning
with a two foot drawdown and a 7010 flow. If the reservoir
is capable of filling and spilling in 2 hours or less under
those conditions (two foot drawdown and 1Q10 flow) then that
will help determine if the project approximates run-of-
river operation and help resolve downstrem flow concerns.
It is be$drawdowndinhat2Dh.aurctimelunder©s. 7010tfloweservoir
could
condition.
3. It was suggested that Duke plot the UsGS gage readings
If
above and below the project: during the l.ow.flow season.
these plots indicate that the flow readings follow the•same
downstream
flow relative concerns pattern, and help deonstrate e that resolve Idols has ?
flow
approximate run-of-river operation.
4. If the screening and flow criteria stated in the NCwaC
correspondence under the impingement and entrainment issues
j.s not met, then. an assessment of the entrainment pot.entia.l.
and a calculation of the cntrainment mortality potential,
based on turbine blade contact, will be an acceptable
approach to resolve the entrainment issue.
5. There is a need to determine the functionality of the
verify fish
fish ladder. If the is non-functional, then the will
ladder r i S.fish
passage can be closed.
v ..
United States Department of the Interior
FISH AND WIGDI. iFE SERVICE
E R*i8h Midi OMM
P" onke B" $37"
d% North Cot+ Uns 276WSM
"w , December 15, 1995
1r. P,.M. Oulday, Senior } nSireeer
Environmental Engineering
FSS Environmental Division
Duke Power Company
P.o. Box 1006
Charlotte, NC 28201-1006
Dear Mr. Oakley'
Thank you for your July 31, 1995, letter requesting comments on the First Stage Consultation
Report for Idols Hydroelectric project (FFRC #2585) and the invitation to the September 19, Wildl 1995, meeting regarding the relicensing of this comments tw o d? in accordat ce with1pra ?stans
(Service) has reviewed the Repoi;t. Tbeso comet Pr
of the Fish and Wildlife Coordination Act (48 Stat. 401, as amended, 16 U.S.C. 661 et seq.),
Section 7 of the Endangered Species Act of 1+713, as amended (16 U.S.C. 1531-1543) and the
Federal Power Act, as amended (16 U.S.C_ 79la-825r).
,nic Idols Hydroelectric Project, located on the Yadkin River in Forsyth to f nconsis
n s t in a
low head rubble ma.nry dam and a wooden powerhouse. TUO p J
approximate run-of-river mode with project operation based on a daily inspection by an operator
who evaluates if the water level is suitable for production without impacting the City of Winston
Salem's water supply intake. The impacts of the approximate run-of-river made vss. a two run-
over
of--river rn«le is of concern to the Service. onl is out entering dinto?tbYP?m? reach is from
the dam occurs. Under this flow regime, the only now
leakage; water passing through the fish ladder; conduct wentering from
flCow study tokdetermin? the
from the tailrace. 'Duke Power may treed ovem
15 requirements for flow within the bypassed reactcond site visit
canceled duelto the la k of
1995, to observe the project daring low flow
suitable conditions. The Service is willing to participate and would appreciate prior notification
of a future site visit.
995,
The Project conraihs a fish ladder at the midpoint shad the
pspillway. resumably tgizthi Sep zztrd ?adr(? 14Mm.3
meeting and site visit, the operator stated that
i and white bass MO= shW[?FS} UM the fish ladder. D%ft ]power should evaluate
r the ladder to determine the species that use the ladder and to what degree. Additionally the flow
required in order for the fish ladder to funtsion dfocdvelY+ as well as length of time this flow
exists during spawning periods far the species of fish found to be utilising the ladder should be
determined.
The Report mentions that the Project c;oaWas a trashrack, however theme is no information
,regarding bar width, spacing, or flow velocity at this point. Indusioa of this informatics woudd
be useful in evaluating the potential for fish impingement and CatrainuMt.
Anodw point of discussion at the September 19, 1995 meeting was the need to enhance public
access to the Yadkin.River, Duke Power wished too' discuss this- at a laW date. +CwMtly
there is a canoe portage area around the Praje d's dam. The Service affirms the impcrW= of
promoting quality wildlife experiences for all of our nation's citizens. To further this goal, the
Service would like to see Duke Power investigate ways to enhance public use of the Project
area.
Once again, thank you for the opportunity to provide comments on this project. We look
forward to working further with Duke Power in the relic si np process r the Jahn
Hydroelectric Project. If you have any quosdons, Please feel frft to ? Y
Ellis at the above address, or at [phone], ext. 26.
r Sincerely,
1
&Uttj Axw--,t....?'
Cherry Green
Acting Supervisor
FWS/ 4jEl.lis:JEE:12-1,5-95:919-856-4520 ext. 26:E:IDC LSIST

Mr .
Duke FQUWr Compaq'
Electric Center
P.O. Box 1006
Chtoiarte, NCW01.1a06-
DUKE POWER
July 31, 1995
Ms. Linda K. Gantt, Field Supervisor
U.S. Department of the Interior
U.S. Fish and Wildlife Service
Division of Ecological Services
P.O, Box 33726
Raleigh, NC 27636
Re: idols Hydroelectric Project
FEPC Project No. 2585
Duke Power Company
First stage Consultation Report
File No: GAH-0444
Dear Ms. Gantt:
please find attached one copy of Duke Power Company's First Stage
Consultation Report for.the idols Hydroelectric Project. This
report complies with the requirements-and guidelines of 10 G.F.R.
16.8 and is submitted in conjuncLion'with the "Unequivocal.
Statement of Intent to File an Application for New License by
Duke Power Company" dated July 25, 1995.
Sincerely,
D. ?. Cook, Jr., Manager
Planning/Analysis/Licensing
ESS Environmental Division
TLH/sh:tlh8
Attachment
CC. Central ReCarcls
Anted oo mcycledm-

Duke Pf wr Compaq
fr. o, Bar 1006
Chutlotte. NC28201.1006
DUKE POWER
May 16, 1996
MS. Linda Gantt, Field supervisor
US Department of the Interior
US Fish and Wildlife Service
Division of Ecological Services
PO Sox 33726
Raleigh, NC 27636-3726
Attention: Mr. John Ellis
Re: Idols Hydroelectric Project
FERC Project No. 2585
Study Plans
File: GAH-404
Dear Mr. Ellis:
On February 12, 1996, Duke Power Company (DPC), the North
Carolina Department of Envirotuaent, Health, and Natural
ResourceR, Division of Water Resources (NCDWR), the North
Carolina Wildlife Resources Commission (NCWRC), and the
United States Fish and Wildlife Service (USEWS) met to
clarify agency comments on the Idols First Stage
Consultation Report. Information and study proposals are
enclosed based on the agreements of the February 12 meeting,
as outlined in the Larch 8, 1996, meeting summary.
The enclosed study plans and information should address
concerns regarding low flow conditions, fish ladder
functionality, dissolved oxygen monitoring, entrainment
assessment, downstream tlow and approximate run-of-river
operation.
Duke Power requests that following your review of they
enclosed information and plans, that you acknowledge your
acceptance in writing.
Sincerely,
E.K. Robinson, Senior Engineer
Engineering, Licensing and Rasource Management
ESS Environmental Division

Page 2
May 16, 1996
cc w/attach: R.D. Harrell
K.P. Mack
W.J. McCabe
E.M. Oakley
IDdL$ RXM?L = YS07=.
STMY PUUM ]1 I1O'OIJ MTECH
Low r:Low DOW OAtr%tioa
Low flow demonstrations planned for earlier this year were
canceled due to high flow conditions. This demonstration
will be rescheduled during late may to early June 1996, when
flow
flow conditions are more conducive LO Bi7.tlfttwith in NCDWR.
scenario. Duke Power Company will
NCWRC, and USFws personnel to reschedule this demonstration.
ris7% Ladder FUnctiOnality
The USFWS requested verification relative to the
functionality of the fish ladder at the Project. The
applicant is not aware of any current or hiatari041
utilization of the spillway fish ladder for upstream passage
at the Project. The only Yadkin River-species that might
uellefit from upstream passage at the project would be the
striped bass during upstream spawning migration.
In the late 1980's, the NC.C investigated the feasibility
of establishing a self-sustaining striped bass population in
the Yadkin River. Upstream passage at the Project was a
consideration 'Of this study. After conducting field surveys
of water velocities In potential striped bass spawning and
nursery areas,.the NCwRC concluded that water velocities
were either inadequate or marginal to suspend striped bass
eggs and fry for successful propagation. Additionally,
research revealed that there were no documented cases where
fish ladders were utilized by striped baso. The VCWRC
concluded there was little likelihood of establishing a
self-sustaining population of striped bass within the Yadkin
River, and that the enhancement of the striped bass
population within the Yadkin River system may be
acoompi_ishad with alternative management methods.
Dissolved oxygen monitoring
The NCVWR, NCWRC, and TISMS, -,Ave Q,Kpre,ssced concerns about
the dissolved omen levels in r_t3e bypass reach during the
low-flow period of the year. To address thee concerns,
he bypass
dissolved Q P--n levels and water tem s in the
b
be mni?
reach just downstream of the spillway will
during: Ju1y-Septemblr e l?6?s Data
instal?.ed in collected
Hydrolab Ddtasonde
The exact monitoring location and placemesnt of the batasonde
II units will be determined during the low flow
demonstration scheduled during May or June 1996.
Two Datasonde II units will be placed in the bypass to-begin
data collection on duly 1, 19.96. The two units will be.
placed in the same location to ensure continuous data
collection in the,eventr one of the units malfunctions. The
units will be programmed to collect data every IS minutee_
With this frequency of data collection, the batteries in
each unit should provide nines consecutive days of operation.
To ensure uninterrupted data collection, however, both units
will be swapped out with new units every seven days. The
units will be returned to the laboratory where the data will
be downloaded, and the units will be cleaned, recalibrated,
and the batteries recharged for redeployment the following
week. This procedure will be repeated each week of the 3-
month study period.
The data collected over the 3-month study period will be
analyzed to provide hourly.averages for dissolved oxygen
(ppm) and water temperature (C). These data will be used to
determine diurnal and diet dissolved oxygen patt~orns in the
bypass reach during the,low-flow period of the year. The
results of this study will be summarized and reported to the
NCDWR, NCWRC, and the USFWS. .
Assessment of Entrainment
The NCWRC and the USFWS have both expressed concerns about
fish entrainment and mortality at the Project. The 14CWRC
'-feria for water intakes establish the maximum intake rsrk
bar spacing and water velocity as 2.5 in and 1.5 fps,
respectively. if these criteria can not be met for the
idols Hydroelectric Project, then specific studies must be
conducted to address entrainment and entrainment mortality.
Due to the configuration of the powerhouse and the resulting
difficulty in conducting definitive entrainment studies,
both NCWRC and the USFWS have agreed that-an assessment of
the entrainment potential and'a-calculation of the
entrainment mortality potential will be an acceptable
approach to address this issue. This approach is consistent
with the approach used for the Spencer Mountain
Hydroelectric Project.
T.ntake yelocity_ Dete?rminations
The first step in addressing the entrainment issue will
consist.- of an evaluation of the intake velocities and trash
rack 9paci.ng at the Project to determine consistency with
..I
the NCWRC screening and flow criteria. Intake velocities
will be determined by measuring velocities just upstream of
the trashrack of each operating unit under four-unit
operation. Due to the inclination of the trashracks,
velocity will be measured along a transect parallel to„the
intake, approximately 2 in upstream of the traehraaks. A
rope will be stretched across the intake at this point to
allow measurements to be taken from a boat- The 16-ft
diameter opening for each unit will be divided into 3-ft
wide vertical strips, for a total of five strips per unit.
A Marsh-Mcairney® Model 201 flowmater will be used to
measure velocity at 0.2 and 0.8 of the water depth within
each vertical strip. velocity data will be summarized
separately for individual units and collectively for all
units. These data will be submitted to the NCWRC and USrw$
for their review.
Entrainment/Mortality Potential
If the trash rack spacing and intake velocities at the
Project exceed the NCwRe criteria, an assessment of the
entrairment potential and a calculation of the entrainment
mortality potential will be conducted. The assessment of
entrainment potential will con sixt of an elactrofishing
evaluation of fish densities in the forebay of the Project
impoundment. The forebay fishery will be sampled with boat-
mounted electrotishing equipment. The shoreline and near-
shore area on the powerhouse side of the river will be
sampled from the intake to just upstream of the railroad
bridge (150--m t:ra.nsect) . sampling will be conducted, during
late May to early June, when, fishes should be concentrated
in the near-shore area. All collected fishes will be
identified to species, measured for total, length (mm), and
released. Data will be summarized to provide a qualitative
and quantitative (catch-per-unit-of-effort) assessment of
(:he forebay fishery.
The assessment of the entrainment mortality potential at the
Project will be conducted by calculating the probability
that an entrained fish will by struck by a turbine blade as
the fish passes through the Project's turbines. The
probability will be calculated using Von laben's formula
(Cddd 1990), based on fish size, turbine; characteristics,
runncr apeed, and discharge. The evaluation will be
conducted for the range of apccies =a sixes of fishes
collected during the forebay fish survey mentioned above.
The application of this formula will be the same an that
used for a similar determination at the Spencer Mountain
Hydroelectric Project. These data will be summarized to
provide an assessment of the entrainment mortality potential
t
for the species of fishes that would most likely be
entrained. These data and the forebay fish survey data will,
be the basis for determining if there Ls a potential
entrainment /mortality problem at the project.
Downstream Flow and ,Avvroximats RU32-of-RA'wr operat4on
It was suggested that puke plot USGS gage readings
ove
below the Project during low flow season. if these plotsand
indicate that the flow readings follow the same relative
pattern, then that Will help resotlveIdo snys h
ldaownstreaman
s flow
concerns and help demonstrate tha a
run-of-river operation. Enclosed are plots of USGS gage
readings above (Knon Gage; drainage area a 1694-s
miles) and below (Yadkin cal], reare
square miles) the °g'? "go; ' drainage area a 2280
project touring the low flow season. The
plats are historical daily mean flows from July 1 to
September 30 for the following years: 1980 - 1986; 1999 -
1991; and 1993. The data for the Enon gage for 1987 and
1992 and the data for the Yadkin College gage for 1988
during desired months was not includad in the source of data
used, and therefore is not-presented in this report . .
Also enclosed is the calculation showing the amount of time
for the Project to fill, and spill, beginning with a two foot
drawdown and a 7010 flow. It was discussed on February 12,
1996 that if the reservoir is capable of filling and
spilling in 2 hours or less under,7Q10 conditions. then that
will help determine if the project approximates run-of-river
operation and help resolve any downstream flow concerns.
References
Cada, Glenn F. 1990. Assessing fish mortality rates,
Hydro Review, Febniary, 1990, -pp. 52-60.
it L-MIIMII*rjm
Calculate amo begitu?ing theith as woo footldrrawd?down and ate QIOtinflow.? *pill,
7Qlq - 582 cfa (Ret. Section S.2 in First Stagg CongUltation Report)
Impoundment Surfatce Area . 35 acres (Ref. Se?ctIon 2.3 in Fixat Stage '
Con*ultation Report).
Drawdowrx t- 2 feet
Fill and Spill Time `f2ft x 35d?roa a
J- .
582 ft 1&o?c ix- 3x 00 ao* hr :? - 1.a5 hours
Calculate the *=unt of dr*wdawn in the reservoir assuming a 7Q10
outflow and zero inflow over a 2 hour period.
3
35 5 s. x acres 58Z x fr'/,?a R. O?LsOrdhr 2.75 , fast
113560 Pt J acre - ••

r
United States Department of the Interior
FISH AND WILDLIFE SERVICE
& Rwoo Fida 08ia
P7 Office RCK 887%
North CAMUM 270""6
tv JUN 2 4 1996 qR June 18, 1996
DUKE POWER COMPANY
esS Environmental Div.
Mr, E.K. Robinson, Senior Engineer
Engineering, Licensing, and Resource Management
ESS Environmental Division
Duke Power Company `,?;tcd firl?
P.O. Dox 1006
Charlotte, NC 28201-1006
Dear Ms. Robinson:
Thank you for your May 16, 1996, letter providing the study proposals for the Idols
Hydroelectric Project (FERC #2595). They plans are based on discussions of the February 12,
1996, meeting as outlined in the. March 8, 19%, maxting summary. The U.S. Fish and Wildlife
Service has reviewed the study plans and finds them acceptable. Once again, thank you for the
opportunity to provide comments on this pmject, We look forward to working further with
Duke Power in the relicensing process for the Idols Hydroelectric Project. If you have any
questions, please feel free to contact me, or John Ellis at the above address, or at (919) 856-
4520, ext. 26.
Sincerely,
Jahn 1H1. He fr
Supervisor
FWS/R4:JEllis:JEP,:6-13-96:919-856-4520 ext. 26:8:11101-SCNC