NC0003417_Report_20220714

Clean Water Act § 316(b)
Compliance Submittal
H.F. LEE ENERGY COMPLEX
Wayne County, North Carolina
NPDES Permit NC0003417
Duke Energy Environmental Services I Environmental Programs
526 South Church Street
Charlotte NC 28202
July 2022
(DUKE
/ENERGY®

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Contents
Executive Summary
1 Introduction
2 Source Water Physical Data [§122.21(r)(2)]
2.1 Description of Source Waterbody [§122.21(r)(2)(i)]
2.2 Characterization of Source Waterbody [§122.21(r)(2)(ii)]
2.2.1 Geomorphology
2.2.2 Hydrology
2.2.3 Water Quality
2.3 Locational Maps [§ 122.21(r)(2)(ii)
3 Cooling Water Intake Structure Data [§ 122.21(r)(3)]
3.1 Description of MWIS Configuration [§122.21(r)(3)(i)]
3.2 Latitude and Longitude of MWIS [§122.21(r)(3)(ii)]
3.3 Description of MWIS Operation [§122.21(r)(3)(iii)]
3.4 Description of Intake Flows [§122.21(r)(3)(iv)]
3.5 Engineering Drawings of CWIS [§122.21(r)(3)(v)]
4 Source Water Baseline Biological Characterization Data [§122.21(r)(4)]
4.1 List of Unavailable Biological Data [§122.21(r)(4)(i)]
4.2 List of Species and Relative Abundance in the vicinity of CWIS [§122.21(r)(4)(ii)]
4.2.1 Exotic Species
4.3 Primary Growth Period
4.3.1 Reproduction and Recruitment
4.4 Species and Life Stages Susceptible to Impingement and Entrainment
4.4.1 Impingement
4.4.2 Entrainment
4.4.3 Selected Species
4.5 Threatened, Endangered, and Other Protected Species Susceptible to Impingement and
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11
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25
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30
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36
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37
39
Entrainment at the MWIS 40
4.6 Documentation of Consultation with Services 42
4.7 Information Submitted to Obtain Incidental Take Exemption or Authorization from Services 42
4.8 Methods and Quality Assurance Procedures for Field Efforts 42
4.9 Protective Measures and Stabilization Activities 42
4.10 Fragile Species 42
5 Cooling Water System Data [§122.21(r)(5)(i)] 43
5.1 Description of Cooling Water System Operation [§122.21(r)(5)(i)] 43
5.1.1 Cooling Water System Operation 43
5.1.2 Proportion of Design Flow Used in the Cooling Water System 44
5.1.3 Cooling Water System Operation Characterization 45
5.1.4 Distribution of Water Reuse 46
5.1.5 Description of Reductions in Total Water Withdrawals 46
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316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
5.1.6 Description of Cooling Water Used in Manufacturing Process 47
5.1.7 Proportion of Source Waterbody Withdrawn 47
5.2 Design and Engineering Calculations [§122.21(r)(5)(ii)] 47
5.3 Description of Existing Impingement and Entrainment Reduction Measures [§122.21(r)(5)(iii)] 48
5.3.1 Best Technology Available for Entrainment 48
6 Chosen Method(s) of Compliance with Impingement Mortality Standard [§122.21(r)(6)] 50
7 Entrainment Performance Studies [§ 122.21(r)(7)] 52
7.1 Site -Specific Studies 52
7.2 Studies Conducted at Other Locations 52
8 Operational Status [§ 122.21(r)(8)] 53
8.1 Description of Operating Status [§ 122.21(r)(8)(i)] 53
8.1.1 Individual Unit Age 53
8.1.2 Utilization for Previous Five Years 53
8.1.3 Major Upgrades in Last Fifteen Years 54
8.2 Description of Consultation with Nuclear Regulatory Commission [§122.21(r)(8)(ii)] 54
8.3 Other Cooling Water Uses for Process Units [§122.21(r)(8)(iii)] 54
8.4 Description of Current and Future Production Schedules [§122.21(r)(8)(iv)] 54
8.5 Description of Plans or Schedules for New Units Planned within Five Years [§122.21(r)(8)(v)] 54
9 References 55
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H.F. LEE ENERGY COMPLEX
Tables
Table 1-1. Facility and Flow Attributes and Permit Application Requirements 12
Table 1-2. Summary of §316(b) Rule for Existing Facilities Submittal Requirements for §122.21(r)(2)-(8). 13
Table 2-1. Mean annual flow (MAF) of the Neuse River since 2010, as measured at the USGS Neuse River at
Goldsboro NC Gage (02089000). 19
Table 2-2. Neuse River mean monthly flow (cfs) at the USGS Neuse River Gage near Goldsboro NC (02089000)
during 2017-2021 19
Table 2-2. Summary statistics of the source water data in the vicinity of the HFLCCS MWIS 20
Table 3-1. HFLCCS MWIS Monthly Total Withdrawals During 2017-2021 25
Table 4-1. Total number and community composition (%) of fish collected by DEP and NCWRC boat
electrofishing in the Neuse River during 2020 and 2021 28
Table 4-2. Known spawning and recruitment period of fish collected in the Neuse River by the MWIS and Cox
Ferry Bridge boat ramp from 2018-2021 (Jenkins and Burkhead, 1993).1 30
Table 4-3. Seasonal and daily activities of species collected in the Neuse River by the MWIS and Cox Ferry
Bridge boat ramp from 2018-2021 (Jenkins and Burkhead, 1993; Rohde et al, 2009). 32
Table 4-4. Entrainment potential for fish (egg and larvae) species present near the HFLCCS MWIS. 37
Table 4-5. Summary of Rare (R), Threatened (T), Proposed Threatened (PT) or Endangered (E) aquatic species
listed for the area around the HFLCCS and record of occurrence or potential to occur near the MWIS 41
Table 4-6. List of fragile species as defined by the EPA and their occurrence near the HFLCCS MWIS in the
Neuse River. 42
Table 5-1. HFLCC Cooling Pond elevations 44
Table 5-2. Percent Monthly Proportion of Design Flow Withdrawn at the HFLCCS. 45
Table 5-3. Comparison of HFLCCS to former coal-fired units. 46
Table 5-4. HFLCCS Percent of Source Waterbody (Neuse River) Withdrawal 47
Table 5-4. MWIS TSV Calculations 48
Table 8-1. HFLCCS Annual Capacity Factors, 2017-2021 54
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316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Figures
Figure 2-1. HFLCCS source water map in the vicinity of the MWIS. 15
Figure 2-2. Upstream instream monitoring location (UP INST) and the LNRBA sampling location in the vicinity
of the HFLCCS MWIS. 16
Figure 2-3. Map Showing the HFLCCS MWIS in the Upper Neuse River Basin (HUC 03020201) 18
Figure 3-1. HFLCCS Water Balance Diagram (March 2018) 22
Figure 3-2. Plan View of MWIS at the HFLCCS 23
Figure 3-3. Section View of MWIS at the HFLCCS 24
Figure 4-1. Neuse River electrofishing survey locations. 28
Figure 5-1. HFLCC cooling pond general arrangement (denoted locations are approximate) 44
Figure 5-2. Monthly Total MWIS Withdrawals at HFLCCS 46
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H.F. LEE ENERGY COMPLEX
Appendices
Appendix A. H.F. Lee Combined Cycle Station § 122.21(r)(2)-(8) Submittal Requirement Checklist.
Appendix B. Engineering Drawings of Makeup Water Intake Structure.
Appendix C. Engineering Calculations for Through -Screen Velocity.
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Abbreviations
°C degrees Celsius
°F degrees Fahrenheit
µS/cm micro Siemens per centimeter
AIF actual intake flow
A01 area of influence
BSS Buck Steam Station
BTA Best Technology Available
CCC closed cycle cooling
CFR Code of Federal Regulations
cfs cubic feet per second
cm centimeter
COC cycles of concentration
CTs combustion turbines
CWA Clean Water Act
CWIS Cooling Water Intake Structure
DEP Duke Energy Progress, LLC
DIF design intake flow
Director NPDES Director
DO dissolved oxygen
Duke Energy Duke Energy Progress, LLC
EPA United States Environmental Protection Agency
ESA Endangered Species Act
fps feet per second
ft foot/feet
ft msl feet above mean sea level
gpm gallons per minute
HRSG heat recovery steam generator
HFCCCS Harry Fitzhugh (H. F.) Lee Energy Complex Combined Cycle Station
HUC Hydrologic Unit Code
IPaC Information for Planning Conservation
IRP Integrated Resource Plan
LNRBA Lower Neuse River Basin Association
m meter
micrometer
µS/cm microsiemens per centimeter
m3 cubic meters
MDCT mechanical draft cooling tower
MGD million gallons per day
mg/L milligrams per liter
mm millimeters
MW megawatts
MWIS Makeup Water Intake Structure
NCDEQ North Carolina Department of Environmental Quality
NCNHP North Carolina Natural Heritage Program
NMFS National Marine Fisheries Service
NPDES National Pollutant Discharge Elimination System
NRDAR Natural Resource Damage Assessment and Restoration
NTU Nephelometric Turbidity Units
OTC once -through cooling
QA Quality Assurance
VI

POA percent open area
rkm river kilometers
Rule Clean Water Act § 316(b) rule
RTE rare, threatened, or endangered
TL total length
TSV through -screen velocity
USEPA U.S. Environmental Protection Agency
USFWS U.S. Fish and Wildlife Service
USGS U.S. Geological Survey
316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
VII

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Executive Summary
On August 15, 2014, regulations implementing §316(b) of the final Clean Water Act (CWA) rule for existing
facilities (the Rule) were published in the Federal Register with an effective date of October 14, 2014.
Facilities subject to the Rule are required to develop and submit technical material, in accordance with
§122.21(r), that will be used by the National Pollutant Discharge Elimination System (NPDES) permit
Director (Director) to make a Best Technology Available (BTA) determination for the facility.
The H.F. Lee Energy Complex Combined Cycle Station (HFLCCS) began commercial operations in December
2012, replacing three coal-fired units which were subsequently demolished. HFLCCS is a single combined
cycle unit, natural gas -fired electric generating facility with a current generating capacity of 1,059 MW'.
HFLCCS wastewater discharges are authorized by NPDES Permit NC0003417. Therefore, HFLCCS is an
existing facility and subject to the Rule.
Based on the §122.21(r) submittal material provided herein, Duke Energy Progress requests a
determination that HFLCCS employs Best Technology Available (BTA) for impingement and entrainment
reduction with currently installed closed -cycle cooling as described below and, as such, no further
impingement or entrainment controls are warranted.
Impingement BTA
The final Rule, at §125.94(c), requires existing facilities to employ one of seven impingement BTA
alternatives'. HFLCCS currently employs BTA for impingement because it employs closed -cycle cooling.
Closed -cycle cooling is identified in the Rule as one of the seven options for compliance.
• Primary Impingement BTA — Closed -cycle cooling with an impoundment with minimal makeup is
utilized which is consistent with a closed -cycle recirculating system (CCRS) defined at
§125.92(c)(2) and meets the BTA Standards for Impingement Mortality at §125.94(c)(1).
• Secondary Impingement BTA — cooling pond makeup water intake structure with a maximum
design through -bar velocity of less than 0.5 fps based on single pump operation; thus meeting the
BTA Standards for Impingement Mortality at §125.94(c)(2).
Overall, impingement at the facility is likely to be very low due to the low makeup flows to the cooling
water impoundment. There are no known federal or state listed species or designated critical habitats
within the source waterbody (Neuse River) in the vicinity of the HFLCCS. As a result, potential adverse
impacts due to impingement are not expected to occur.
1 The H.F. Lee Energy Complex also includes the 863 MW Wayne County Plant which consists of five simple cycle
combustion turbines (CTs). These CTs use no cooling water and therefore are not subject to the 316(b) Rule.
2 Or under specific circumstances one of nine alternatives, which includes §125.94(c)(11) and (12) in addition to
§125.94(c)(1)-(7).
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316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Entrainment BTA
The Rule does not prescribe BTA for entrainment; however, requires it to be determined on a site -specific
basis. This submittal demonstrates that HFLCCS meets BTA for entrainment based on the following:
• HFLCCS uses closed -cycle cooling, which minimizes entrainment through flow reduction. During
the 2017-2021 period, HFLCCS had an average withdrawal of 4.5 million gallons per day (MGD)
which is substantially less than the 125 MGD value of concern technically justified by the Rule.
The flow reduction achieved with consideration of the high -efficiency combined cycle facility, is
calculated to be 98.8% as compared to an equivalent once -through cooling (OTC) facility based
on average MWIS flow and 365 days per year operation. In addition, the average flow is reduced
87.1 percent from the design ultimate potential flow of 35.0 MGD.
• Statements made by the United States Environmental Protection Agency (EPA) in the preamble
to the Rule support this conclusion:
"Although this rule leaves the BTA entrainment determination to the Director,
with the possible BTA decisions ranging from no additional controls to closed -cycle
recirculating systems plus additional controls as warranted, EPA expects that the
Director, in the site -specific permitting proceeding, will determine that facilities
with properly operated closed -cycle recirculating systems do not require
additional entrainment reduction control measures. "3
This conclusion is further reiterated in the Response to Public Comments document, where EPA
states:
"EPA has made it clear that a facility that uses a closed -cycle recirculating
system, as defined in the rule, would meet the rule requirements for
impingement mortality at § 125.94(c)(1). This rule language specifically identifies
closed -cycle as a compliance alternative for the [impingement mortality]
performance standards. EPA expects the Director would conclude that such a
facility would not be subject to additional entrainment controls to meet BTA."4
• The final Rule for new facilities published in the Federal Register on December 18, 2001 which
had an effective date of January 17, 2002, does prescribe BTA for entrainment', which HFLCCS
meets. Regulations are more stringent for new facilities than for existing facilities. By virtue of
meeting the most stringent entrainment BTA criteria (i.e., applicable to new facilities), HFLCCS is
compliant for entrainment BTA under the final Rule for existing facilities.
3 79 Fed. Reg. 48344 (15 August 2014)
Response to Comments, Essay 14, p. 62.
' BTA for entrainment under the new facilities rule at 40 CFR §125.84(b) requires facilities with design intake flow
equal to or greater than 10 MGD, and under Track 1, to employ closed -cycle recirculating cooling as well.
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316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Potential impacts to fish and shellfish populations due to entrainment are also extremely unlikely due to:
• The use of closed cycle recirculating cooling via a cooling pond with minimized makeup;
• Low actual and design water withdrawals; and
• The location, operation, and configuration of the makeup water intake with a calculated through
bar velocity (TBV) for the design intake flow (DIF) case is 0.48 fps (single pump operation) and
under actual intake flow (AIF) conditions is 0.12 fps.
Based on the above facts, entrainment is reduced to the maximum extent warranted and additional
control measures are not warranted nor necessary for the HFLCCS.
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316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
1 Introduction
Section 316(b) was enacted under the 1972 CWA, which also introduced the NPDES permit program.
Certain facilities with NPDES permits are subject to §316(b) requirements, which require the location,
design, construction, and capacity of the facility's cooling water intake structure (CWIS)6 to reflect BTA
for minimizing potential adverse environmental impacts.
On August 15, 2014, regulations implementing §316(b) of the CWA for existing facilities (Rule) were
published in the Federal Register with an effective date of October 14, 2014. The Rule applies to existing
facilities that withdraw more than 2 MGD from waters of the United States, use at least 25 percent of
that water exclusively for cooling purposes, and have or require an NPDES permit.
Facilities subject to the Rule are required to develop and submit technical material that will be used by
the NPDES Director (Director) to make a Best Technology Available (BTA) determination for the facility.
The actual intake flow (AIF)' and design intake flow (DIF)8 at a facility determines which submittals will
be required. As shown in Table 1-1, facilities with an AIF of 125 MGD or less have fewer application
submittal requirements and will generally be required to select from the impingement compliance
options contained in the final Rule. Facilities with an AIF greater than 125 MGD are required to address
both impingement and entrainment, and provide specific entrainment studies, which may involve
extensive field studies and the analysis of alternative methods to reduce entrainment (§122.21(r)(9)-
(13)).
The §316(b) compliance schedule under the Rule is dependent on the facility's NPDES permit renewal
date. Facilities are to submit their §316(b) application material to the Director with their next permit
renewal application unless that permit renewal application is due prior to July 14, 2018, in which case an
alternate schedule may be requested.
6 CWIS is defined as the total physical structure and any associated constructed waterways used to withdraw
cooling water from Waters of the United States. The CWIS extends from the point at which water is first
withdrawn from waters of the United States up to, and including, the intake pumps. This report concerns the
MWIS located at the terminal end of the constructed canal along the Neuse River.
AIF is defined as the average volume of water withdrawn on an annual basis by the cooling intake structure over
the past 3 years initially and past 5 years after Oct. 14, 2019. The calculation of AIF includes days of zero flow. AIF
does not include flows associated with emergency and fire suppression capacity.
8 DIF is defined as the value assigned during the CWIS design to the maximum instantaneous rate of flow of water
the CWIS is capable of withdrawing from a source waterbody. The facility's DIF may be adjusted to reflect
permanent changes to the maximum capabilities of the cooling water intake system to withdraw cooling water,
including pumps permanently removed from service, flow limit devices, and physical limitations of the piping. DIF
does not include values associated with emergency and fire suppression capacity or redundant pumps (i.e., back-
up pumps).
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Table 1-1. Facility and Flow Attributes and Permit Application Requirements.
Existing facility with DIF greater than 2
MGD and AIF greater than 125 MGD.
Existing facility with DIF greater than 2
MGD and AIF less than 125 MGD.
Existing facility with DIF of 2 MGD or
less, or less than 25 percent of AIF
used for cooling purposes.
New units at existing facility.
316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
§122.21(r)(2)-(13)
§122.21(r)(2)-(8)
Director Best Professional Judgment
§122.21(r)(2), (3), (5), (8), and (14) and applicable
paragraphs (r)(4), (6), and (7) of §122.21(r)
Duke Energy Progress, LLC's (Duke Energy) HFLCCS is subject to the existing facility rule and, based on its
current configuration and operation (i.e., the facility has a DIF greater than 2 MGD and an AIF of less
than 125 MGD), Duke Energy is required to develop and submit each of the §122.21(r)(2)-(8) submittal
requirements (Table 1-2) with its next permit renewal application in accordance with the facility NPDES
operating permit and the Rule's technical and schedule requirements. Appendix A provides a checklist
summary of the specific requirements under each of the §122.21(r)(2)-(8) submittal requirements and
how each is addressed in this report or why it is not applicable to HFLCCS.
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316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Table 1-2. Summary of §316(b) Rule for Existing Facilities Submittal Requirements for §122.21(r)(2)-(8).
(2)
Source Water Physical Data Characterization of the source waterbody including
intake area of influence.
(3)
Cooling Water Intake Structure Data Characterization of the cooling water intake system;
includes drawings and narrative; description of
operation; water balance.
(4) Source Water Baseline Biological Characterization of the biological community in the
Characterization Data vicinity of the intake; life history summaries;
susceptibility to impingement and entrainment;
existing data; identification of missing data;
threatened and endangered species and designated
critical habitat summary for action area;
identification of fragile fish and shellfish species list
(<30 percent impingement survival).
(5) Cooling Water System Data Narrative description of cooling water system and
intake structure; proportion of design flow used;
water reuse summary; proportion of source
waterbody withdrawn (monthly); seasonal operation
summary; existing impingement mortality and
entrainment reduction measures; flow/megawatts
(MW) efficiency.
(6) Chosen Method of Compliance with Provides facility's proposed approach to meet the
Impingement Mortality Standard impingement mortality requirement (chosen from
seven available options); provides detailed study
plan for monitoring compliance, if required by
selected compliance option; addresses entrapment
where required.
(7)
Entrainment Performance Studies
Provides summary of relevant entrainment studies
(latent mortality, technology efficacy); can be from
the facility or elsewhere with justification; studies
should not be more than 10 years old without
justification; new studies are not required.
(8) Operational Status Provides operational status for each unit; age and
capacity utilization for the past 5 years; upgrades
within last 15 years; uprates and Nuclear Regulatory
Committee relicensing status for nuclear facilities;
decommissioning and replacement plans; current
and future operation as it relates to actual and
design intake flow.
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316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
2 Source Water Physical Data [§122.21(r)(2)]
The information required to be submitted per 40 Code of Federal Regulations (CFR) §122.21(r)(2),
Source Water Physical Data, is as follows:
(i) A narrative description and scaled drawings showing the physical configuration of all source
water bodies used by your facility, including areal dimensions, depths, salinity and temperature regimes,
and other documentation that supports your determination of the waterbody type where each cooling
water intake structure is located;
(ii) Identification and characterization of the source waterbody's hydrological and
geomorphological features, as well as the methods you used to conduct any physical studies to
determine your intake's area of influence within the waterbody and the results of such studies;
(iii) Locational maps; and,
(iv) For new offshore oil and gas facilities that are not fixed facilities, a narrative description and/or
Locational maps providing information on predicted locations within the waterbody during the permit
term in sufficient detail for the Director to determine the appropriateness of additional impingement
requirements under §125.134(b)(4).
Each of these requirements is described in the following subsections.
2.1 Description of Source Waterbody [§122.21(r)(2)(i)]
The HFLCCS withdraws cooling water from an existing 545 acre permitted closed -cycle cooling pond with
baffled dikes to treat recirculating condenser cooling and process water. To maintain pond levels, Duke
Energy Progress, LLC (DEP) operates a Cooling Pond MWIS located at the terminal end of a 500-foot
constructed intake canal. The MWIS provides the source water for the closed -cycle cooling water
system. The intake canal receives water from the mainstem Neuse River through a constructed by-pass
canal located near river mile 145 (Fig 2-1).
The Neuse River Basin (Basin) is located in the northern Piedmont and central coastal plain of North
Carolina. The mainstem Neuse River originates (Person and Orange counties North Carolina) and flows
southeast to its terminus into the Pamlico Sound by Carteret and Hyde counties North Carolina. The
Basin covers roughly 6,200 square miles of land and open water (NCDEQ 2018). Within the Neuse River
basin, the MWIS is located within the Quaker Neck Lake-Neuse River 12-Digit HUC (HUC Code
030202011705). The Neuse River, in the vicinity of the MWIS is classified as Water Supply IV (sources of
water supply for drinking, culinary, or food processing purposes) and NSW (Nutrient Sensitive Waters -
waters needing additional nutrient management due to being subject to excessive growth of
microscopic or macroscopic vegetation) by the North Carolina Department of Environmental Quality
(NCDEQ 2021).
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316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Figure 2-1. HFLCCS source water map in the vicinity of the MWIS.
2.2 Characterization of Source Waterbody [§122.21(r)(2)(ii)]
To identify and characterize the primary source waterbody (i.e., Neuse River in the vicinity of the MWIS)
the following data were reviewed:
• NPDES Permit No. NC0003417 — A. 21 Instream Monitoring Requirement (upstream location
only) July 2019 through May 2021.
• Lower Neuse River Basin Association (LNRBA) water quality results from Neuse River @ SR 1201
near Cox Mill during 2020.
Duke Energy is required to collect and report (electronic Discharge Monitoring Report) grab samples
monthly from two locations within the Neuse River. This requirement was effective July 1, 2019.
Summarized results from samples collected near the MWIS (UP INST) were used to characterize the
source water for the purpose of this report (Figure 2-2).
The LNRBA water quality monitoring program collected grab samples monthly throughout the Neuse
River Basin. Summarized results from samples collected near the MWIS (Neuse River @ SR 1201 near
Cox Mill) were also used to characterize the source water for the purpose of this report.
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316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
a
LNRBASampling Loc#tion
Figure 2-2. Upstream instream monitoring location (UP INST) and the LNRBA sampling location in the vicinity of
the HFLCCS MWIS.
2.2.1 Geomorphology
The HFLCCS is located within the Southeastern Plains III ecoregion, more specifically, the MWIS is
located within the Southeastern Floodplains and Low Terraces (Level IV) of the Southeastern Plains
ecoregion. Characteristics of the Southeastern Plains ecoregion include broad interstream areas having
a mosaic of cropland, pasture, woodland, and forest. The Cretaceous or Tertiary -age sands, silts, and
clays of the region contrast geologically with the older metamorphic and igneous rocks of the Piedmont
and Blue Ridge ecoregions. Elevations and relief are greater than in the Southern Coastal Plain
ecoregion, but generally less than in much of the Piedmont or in the more mountainous Blue Ridge
ecoregion. Streams in this area are relatively low -gradient and sandy -bottomed (Griffith et al. 2002).
Southeastern Floodplains and Low Terraces (SFLT) encompass a riverine ecoregion that provides
important wildlife corridors and habitat. The primary geography of the SFLT is composed of alluvium
and terrace deposits of sand, clay, and gravel. The region includes large sluggish rivers and backwaters
with ponds, swamps, and oxbow lakes. The SFLT region is a flood -prone region which includes brown -
water floodplains and blackwater floodplains. Brown -water floodplains originate in or cross the
Piedmont and contain sediments with more weatherable and mixed minerals than the blackwater
floodplains with watersheds entirely contained within the Coastal Plain. The low terraces are mostly
forested, although some cropland or pasture occurs in some areas that are better drained (Griffith et al.
2002).
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316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
2.2.2 Hydrology
The MWIS is located in the Quaker Neck Lake-Neuse River 12-Digit HUC (HUC Code 030202011705)
portion of the Moccasin Creek-Neuse River 10-Digit HUC (0302020117). Both subbasins are located in
the Upper Neuse River subbasin 8-Digit HUC (03020201) (Figure 2-3). Land use within this section of the
basin is predominantly forested followed by planted/cultivated and developed land in percent area
coverage (NCDEQ 2018).
United States Geological Service (USGS) Gauging Station 02089000 is located near Goldsboro NC,
approximately six river miles from the MWIS. Data from this Station was used for this report.
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316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Durham
•
%Mike
Harried
Legend
•HF Lee Energy Comp -let; 10 diigit Hydrologic UnitCup
ne+ [1I Upper Neuie nrrvef basin Black Creak
- Nitue#RiwlrrBasn. hrirorrkapor arc ; CrahtravCreek
CeuntL Elqurdar Eno Rnrr
Falling Greek
Flat R rrer
LACe River
Lower FUMJ LJ1
Lower Li;t1e Rixe�r
t
Sarnpeon
Franklin
HF Lee Energy Complex
rf \
Figure 2-3. Map Showing the HFLCCS MWIS in the Upper Neuse River Basin (HUC 03020201).
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316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Table 2-1. Mean annual flow (MAF) of the Neuse River since 2010, as measured at the USGS Neuse River at
Goldsboro NC Gage (02089000).
Year
Neuse River MAF
(cfs)
2010 2613
2011 1103
2012 1008
2013 2186
2014 2945
2015 2635
2016 3324
2017 3025
2018 2315
2019 4006
2020 3294
2021 4354
Table 2-2. Neuse River mean monthly flow (cfs) at the USGS Neuse River Gage near Goldsboro NC (02089000)
during 2017-2021.
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
2017
2851
1217
1254
4085
6941
2780
958.4
792.2
1142
671.3
641
1024
2018
1224
2281
2548
3290
2458
1338
695.3
2941
8825
3636
5706
7982
2019
6499
4189
6646
6057
1398
2059
1402
981.4
1508
695.4
980.4
2701
2020
3692
8094
2782
1899
3718
4758
1275
4852
4354
2986
6955
6085
2021
8352
10020
6759
2543
667.9
2344
3771
1587
572.3
1030
561.4
794.2
2.2.3 Water Quality
As an element of the H.F. Lee National Pollutant Discharge Elimination System (NPDES) Permit, DEP is
required to collect surface water instream samples from the Neuse River monthly. The sampling
locations are upstream and downstream of the H.F. Lee discharges to the Neuse River. Data resulting
from samples collected from mid-2019 through mid-2021 at location UP INST (Figure 2-2), in the vicinity
of the MWIS, were a component of the data used to characterize water quality.
In addition to collecting instream data, DEP participates in the LNRBA water quality monitoring program.
During 2020, one of the sampling locations (Neuse River @ SR 1201 (Richardson Bridge Road) near Cox
Mill) was in close proximity to the MWIS (Figure 2-2). Results from samples collected at this location
were also used to characterize water quality.
The North Carolina Department of Environment and Natural Resources Division of Water Quality
associates urban development within the Neuse River Basin as the primary driver altering the watershed
hydrology, resulting in downstream flooding, streambank erosion, channel incision, increased turbidity
and degrading aquatic habitat and biological health (NCDEQ 2009). Additionally, nonpoint source runoff
from a variety of land use practices have been identified as the primary contributor to impacted surface
19

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
waters in the Neuse River Basin. Runoff from rain events carries sediment, nutrients and toxicants that
affect the aquatic ecosystem, and fecal coliform bacteria that result in impairment of recreation and
shellfish harvesting use support categories. Excessive nutrient loading is the primary stressor in the
Neuse River Basin resulting in the chlorophyll a impairment of Falls Lake and the Neuse River Estuary.
While great strides have been made in the reduction of nitrogen contribution from both point and
nonpoint sources to the Neuse River Basin, many challenges remain in developing a thorough
understanding of the complex nutrient delivery system and management strategies that will be most
effective to achieve timely water quality improvements (NCDEQ 2009).
The wide range of results from data collected by DEP and the LNRBA (Table 2-1) near the MWIS highlight
the Neuse River Basin characteristics described in the Neuse River Basinwide Water Quality Plan (NCDEQ
2009).
Table 2-2. Summary statistics of the source water data in the vicinity of the HFLCCS MWIS.
Parameter
Time Period
Source Range Mean n
Dissolved Oxygen (mg/L)
Conductivity (uS/cm)
pH (SU)
Temperature (°C)
Turbidity (NTU)
Suspended Residue (mg/L)
Total Dissolved Solids (mg/L)
Bromide (mg/L)
Ammonia (mg/L)
Total Kjeldahl Nitrogen (mg/L)
Nitrate + Nitrite (mg/L)
Phosphorus (mg/L)
Hardness (mg/L)
Arsenic, total (ug/L)
Chromium, total (ug/L)
Copper, dissolved (ug//L)
Lead, dissolved (ug/L
Mercury, total (ng/L)
Selenium, total (ug/L)
Zinc, dissolved (ug/L)
01/01/2020 - 12/31/2020
01/01/2020 - 12/31/2020
01/01/2020 - 12/31/2020
01/01/2020 - 12/31/2020
01/01/2020 - 12/31/2020
01/01/2020 - 12/31/2020
07/01/2019 - 02/28/2021
07/01/2019 - 02/28/2021
01/01/2020 - 12/31/2020
01/01/2020 - 12/31/2020
01/01/2020 - 12/31/2020
01/01/2020 - 12/31/2020
07/01/2019 - 02/28/2021
07/01/2019 - 02/28/2021
07/01/2019 - 02/28/2021
07/01/2019 - 02/28/2021
07/01/2019 - 02/28/2021
07/01/2019 - 02/28/2021
07/01/2019 - 02/28/2021
07/01/2019 - 02/28/2021
2.3 Locational Maps [§ 122.21(r)(2)(ii)
LN RBA
LNRBA
LNRBA
LNRBA
LNRBA
LN RBA
DEP
DEP
LNRBA
LN RBA
LNRBA
LRNBA
DEP
DEP
DEP
DEP
DEP
DEP
DEP
DEP
4/6 - 11.5
50 - 199
5.2 - 7.2
8.7 - 28.4
20 - 130
28 - 137
59.6 - 157.0
<0.1
0.03 - 0.33
0.56 - 1.10
0.15 - 0.71
0.09 - 0.27
12.0 - 40.2
0.4 - 0.7
<0.5 - 2.3
0.9 - 7.7
<0.1 - 0.7
1.7 - 20.2
<0.5
<5.0 - 11.5
7.0 19
105 19
na 19
21.1 19
47.4 13
59.3 13
89.7 20
na 20
0.11 13
0.84 13
0.31 13
0.15 13
26.1 20
0.5 20
1.1 20
2 20
0.2 20
6.1 21
na 20
5.5 20
An aerial photograph of the HFLCCS and its environs is provided on Figure 2-1 (Section 2.1).
20

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
3 Cooling Water Intake Structure Data [§
122.21(r)(3)]
The information required to be submitted per 40 CFR §122.21(r)(3), Cooling Water Intake Structure
Data, is outlined as follows:
(I) A narrative description of the configuration of each of the cooling water intake
structures and where it is located in the waterbody and in the water column;
(ii) Latitude and longitude in degrees, minutes, and seconds for each of the cooling water
intake structures;
(iii) A narrative description of the operation of each of the cooling water intake structures,
including design intake flows, daily hours of operation, number of days of the year in operation
and seasonal changes, if applicable;
(iv) A flow distribution and water balance diagram that includes all sources of water to the
facility, recirculating flows, and discharges; and
(v) Engineering drawings of the cooling water intake structure.
Each of these requirements is described in the following subsections.
3.1 Description of MWIS Configuration [§122.21(r)(3)(i)]
Cooling pond makeup water for HFLCCS is withdrawn from the Neuse River via an existing intake canal
with an as constructed bottom width of 35 feet, a length of about 500 feet, and 1:1.5 side slopes. This
MWIS is the only component considered within the 316(b) Rule for the HFLCCS. The cooling pond was
completed in 1972 and supported the former (now demolished) three coal-fired units. The cooling pond
MWIS repurposed the former Unit 3 discharge structure. The HFLCCS MWIS features two individual
makeup water pumps that withdraw from a bay in the MWIS. The makeup water pump discharges are
combined in a common pipe that is approximately 400 feet long and discharged directly to the closed -
cycle cooling pond. Each makeup pump is rated for 12,150 gpm (17.5 MGD) for a total design flow (DIF)
of 35.0 MGD. Administratively, only one of the two makeup pumps is operated with the remaining
pump for redundancy.
The MWIS has a bar rack with 4" center spacing to prevent larger debris from entering the makeup
pumps. The MWIS is designed with a high Neuse River elevation of 79.0 feet and a low elevation of 60.0
feet. The MWIS invert is at elevation 52.0 feet.
A separate structure in the cooling pond that is not 316(b) Rule -related provides cooling water to the
HFLCCS main condenser and other plant needs such as fire protection water and makeup water for the
combined cycle unit heat recovery steam generator (HRSG). The HFLCCS water balance diagram is
provided as Figure 3-1.
Figure 3-2 provides a plan view of the HFLCCS MWIS, and Figure 3-3 provides relevant MWIS elevation
data.
21

Waw Co. Cr Ste
Kiwi Prnepua
won Tpsllcr
obd Drain Tanks
316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
f a(rciionSump
I
Wilma Oa. CT 5Re
ROSrsoern ....
R.O.R lwei
Barre fleleflan
Plee t
V
114c C.0
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Prooessrs
fl51 Wow
Selma -Mar
�SIYd�eF
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n.dinr.rivv�
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Clutha!' f?flt
F
v
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9IIKr FiCmm I
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Y
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Off-si.c
Elispaal
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14'mles
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4141iirin4 fiI&H IDNr1
j+p .4111a g area SW
9iadge
irr, drnli�rf asn fiiiiIcdli}i3i1
W , .....y�
.N.wlMt4r -I. ADE
cc
ErupuraGud and
SCCprret
l]Wrpriaax
Coding waber intake
mica DOI
Nam Riyer
4*
lli4� E�SaR#Up Inwko
Figure 3-1. HFLCCS Water Balance Diagram (March 2018)9
9 Note that subsequent modifications to the facility NPDES permit deleted the domestic sewage system
contributary flow, Outfall 002A (Emergency Spillway from Cooling Pond) was added, and Outfall 003 was deleted.
22

i
316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
SYM AlT a mate up WATER PIA4PO
A7 -a w a-V! YAIOLl 4
1-t'•x9L6 C94CMAMCa 1 i.at
60T FLAIS6E OMLY
ILIL L l a ? PP Fi0L@ ILICCWC
ragt
7
a+u ;� Ja
tiay eg3
ILI 4
QC14)
I-MCEx22. ¢4LG• 4 PLACES)
41.
L n
J
IW r•JI(ll4Lra
NEW COAL t draw WITH GKG-%/G WWF
PLAIN
MrAKE-UP WATEE PUMP 1UPPOeT
LAI WST 4Ntt NO.S d14CH STICL+GTUT
Figure 3-2. Plan View of MWIS at the HFLCCS
SYMAAST#e*iST UiJIT 5viwcH srRUGT
23

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
E
Rtal-1. WATesz
E1.. 7.J-C
L`CW_WATIVIE
BQ�
NOTa
12D RO-ta • Cc'b4 rTMU r..T_ION -
WATEfZ-LEV .SHALL•13L,
5?AWTAIu>*n—A.r L.fa9
623
•.•3
1:a_InATE
IA CO OM-V. PIPE
I:49.2I!
�S�ST1L�t6
4
Figure 3-3. Section View of MWIS at the HFLCCS
3.2 Latitude and Longitude of MWIS [§122.21(r)(3)(ii)]
The approximate latitude and longitude (in degrees, minutes, and seconds) of the HFLCCS MWIS is:
• Latitude: 35° 22' 41" N
• Longitude: 78° 05' 18" W
3.3 Description of MWIS Operation [§122.21(r)(3)(iii)]
Withdrawal from the Neuse River is dependent on makeup water demand, maximum pump capacity,
and water loss due to evaporation and system losses. Because makeup water demand is directly related
to the operation of generating units and in turn, the cooling water system, HFLCCS MWIS operation
generally follows a base load pattern.
24

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Operation of the MWIS is nearly continuous with at least one pump withdrawing water from the Neuse
River. During the 2017-2021 period, the MWIS operated an average of approximately 6.2 hours each
day with one of the two installed pumps withdrawing water.
3.4 Description of Intake Flows [§122.21(r)(3)(iv)]
Monthly average water withdrawals during the 2017-2021 period are provided in Table 3-1. The average
withdrawal for this period was 4.5 MGD compared to a DIF of 35.0 MGD.
Table 3-1. HFLCCS MWIS Monthly Total Withdrawals During 2017-2021.
Month 2017 2018 2019 2020 2021
January 123.0 149.3 87.8 86.4 45.4
February 121.5 82.0 53.4 76.9 0.0
March 129.6 119.3 166.2 127.4 0.0
April 366.7 175.0 117.1 181.5 142.0
May 133.2 56.4 164.0 97.4 125.2
June 146.4 270.1 205.0 59.3 217.4
July 248.9 183.7 206.4 269.4 98.1
August 220.3 90.0 194.7 153.7 210.8
September 124.4 99.6 158.8 123.7 93.7
October 224.7 93.7 137.6 129.6 187.4
November 80.5 81.3 124.4 129.4 19.8
December 255.5 68.8 232.8 95.9 96.6
Annual
Average 6.0 4.0 5.1 4.2 3.4
Units = MG for monthly total, MGD for annual average
3.5 Engineering Drawings of CWIS [§122.21(r)(3)(v)]
The following engineering drawings of cooling water intake structures are provided in Appendix B:
• Drawing G-105107: Circulating Water System Modification River Structure Details
• Drawing G-105109: Circulating Water System Modification Make Up Water Area FDN Details
25

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
4 Source Water Baseline Biological Characterization
Data [§122.21(r)(4)]
The information required to be submitted per 40 CFR §122.21(r)(4), Source Water Baseline Biological
Characterization, is outlined as follows:
(i) A list of the data supplied in paragraphs (r)(4)(ii) through (vi) of this section that are not
available, and efforts made to identify sources of the data;
(ii) A list of species (or relevant taxa) for all life stages and their relative abundance in the
vicinity of CWIS;
(iii) Identification of the species and life stages that would be most susceptible to impingement
and entrainment;
(iv) Identification and evaluation of the primary period of reproduction, larval recruitment, and
period of peak abundance for relevant taxa;
(v) Data representative of the seasonal and daily activities of biological organisms in the vicinity
of CWIS;
(vi) Identification of all threatened, endangered, and other protected species that might be
susceptible to impingement and entrainment at a cooling water intake structure(s);
(vii) Documentation of any public participation of consultation with Federal or State agencies
undertaken in development of the plan;
(viii) Methods and QA procedures for any field efforts;
(ix) In the case of the owner or operator of an existing facility or new unit at an existing facility,
the Source Water Baseline Biological Characterization Data is the information included in (i)
through (xii);
(x) Identification of protective measures and stabilization activities that have been
implemented, and a description of how these measures and activities affected the baseline
water condition in the vicinity of CWIS;
(xi) List of fragile species as defined at 40 CFR 125.92(m) at the facility; and
(xii) Information submitted to obtain incidental take exemption or authorization for its cooling
water intake structure(s) from the U.S. Fish and Wildlife Service or the National Marine
Fisheries Service.
Each of these requirements is described in the following subsections.
26

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
4.1 List of Unavailable Biological Data [§122.21(r)(4)(i)]
The biological data needed to prepare the information required under 40 Code of Federal Regulations
(CFR) §122.21(r)(4) are available. The historical data reviewed to develop the baseline biological
characterization of the source waterbody, Neuse River near the MWIS includes the following:
• DEP boat electrofishing surveys conducted during 2020 and 2021
• North Carolina Wildlife Resources Commission (NCWRC) Neuse River American Shad Survey,
2019 and 2020
• NCWRC Neuse River Striped Bass Monitoring Program, 2018 and 2019.
These data were compiled and analyzed for this report and are summarized below. This report was
developed utilizing the relevant existing data in the Neuse River near the MWIS. No recent
impingement or entrainment studies were performed in support of the development of this compliance
document.
4.2 List of Species and Relative Abundance in the vicinity of CWIS
[§122.21(r)(4)(ii)]
Methods for DEP Surveys
Boat electrofishing surveys were conducted in the mainstem Neuse River immediately upstream of the
Cox Ferry Bridge boat ramp and in the Intake canal during the spring of 2020 and 2021 (Figure 4-1).
Each area was surveyed using a Smith Root equipped, Wisconsin design electrofishing boat with pulsed
DC current. Immobilized fish were collected and identified to the species level when possible, using
regional taxonomic references (Menhinick 1991, Jenkins and Burkhead 1993). Minimum and maximum
total length (mm) for individual species was also recorded. Fish that could not be accurately identified
in the field were preserved and transported to the laboratory for identification and body meristic.
Methods for NCWRC Surveys
Target species (American Shad and Striped Bass) spring boat electrofishing surveys were conducted in
the Neuse River, including the Cox Ferry Bridge boat ramp, by NCWRC biologists from 2018 — 2020.
Immobilized target species were collected and measured for total length (mm) and weight (g). Sex was
determined by applying directional pressure to the abdomen toward the vent and observing the
presence of milt (male) or eggs (female) (Ricks et. al. 2021, and Ricks and VanMiddlesworth 2020)
27

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Makeup Water Intake Structui
Intake Sampling Location
Figure 4-1. Neuse River electrofishing survey locations.
From 2020 to 2021, Duke Energy collected a total of 601 fish, representing 25 species (excluding hybrids
and unidentified individuals) by boat electrofishing in the vicinity of the H.F. Lee MWIS. Collectively
(Intake and Cox Ferry Bridge collections combined), dominant species (those with greater than 5%
species composition) included Bluegill (16.3%), Threadfin Shad (14.1%), Blue Catfish (9.7%) Longnose
Gar (9.3%), Gizzard Shad (8.3%), Chanel Catfish (8.0%), Common Carp (7.0%) and Bowfin (6.0%) (Table 4-
1). Differences in species composition were noted between the Intake and Cox Ferry Bridge survey
location (mainstem Neuse River). The fish community around the Intake was less diverse when
compared to the fish community around the Cox Ferry Bridge survey location (17 and 22 species
respectively). Dominant species within the Intake location include Gizzard Shad (19.9%), Threadfin Shad
(18.1%), Bluegill (18.1%), Longnose Gar (16.4%) and Redear Sunfish (7.5%) (Table 4-1). Dominant
species within the Cox Ferry Bridge location include Blue Catfish (15.5%), Bluegill (15.2%), Threadfin
Shad (11.7%), Channel Catfish (11.5%), Common Carp (9.9%), Bowfin (8.5%), Notchlip Redhorse (5.3%),
and Longnose Gar (5.1%) (Table 4-1). American Shad and Striped Bass were also present within in the
mainstem Neuse River based on NCWRC collections (Table 4-1, Ricks and VanMiddlesworth 2020, and
Ricks et. al. 2021).
Table 4-1. Total number and community composition (%) of fish collected by DEP and NCWRC boat electrofishing
in the Neuse River during 2020 and 2021.
Overall
Intake Cox Ferry Bridge
Scientific Name Common Name
Total Composition Total Composition Total Composition
Number Number Number
Alosa mediocris Hickory Shad 6 1.0 6 1.6
A. sapidissima American Shad' 544 544
28

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Overall
Intake
Cox Ferry Bridge
Scientific Name Common Name
Total Composition Total
Number
Number
Composition Total Composition
Number
Amia calva
Anguilla
rostrata
Cyprinella
analostana
Cyprinus carpio
Dorosoma
cepedianum
D. petenense
Esox niger
Gambusia
holbrooki
Ictalurus
furcatus
1. punctatus
Lepisosteus
osseus
Lepomis auritus
L. cyanellus
L. gibbosus
L. macrochirus
L. microlophus
Luxilus albeolus
Micropterus
salmoides
Morone saxatilis
Moxostoma
callapsum
Mugil cephalus
Notropis
hudsonius
Bowfin
American Eel
Satinfin Shiner
Common Carp
Gizzard Shad
Threadfin Shad
Chain Pickerel
Eastern
Mosquitofish
Blue Catfish
Channel Catfish
Longnose Gar
Redbreast
Sunfish
Green Sunfish
Pumpkinseed
Bluegill
Redear Sunfish
White Shiner
Largemouth
Bass
Striped Bassi
Notchlip
Redhorse
Striped Mullet
Spottail Shiner
36
11
3
42
50
85
1
2
58
6.0
1.8
0.5
7.0
8.3
14.1
0.2
0.3
9.7
4
1
5
45
41
1.8
0.4
2.2
19.9
18.1
48 8.0 5 2.2
56 9.3 37 16.4
2
0.3
4 0.7 4 1.8
2 0.3 2 0.9
98 16.3 41 18.1
18 3.0 17 7.5
18 3.0 10 4.4
2 0.3 1 0.4
578 Unknown
21 3.5 1 0.4
2 0.3
16 2.7 2
0.9
32
10
3
37
5
44
1
2
58
43
19
2
57
1
8
1
Unknown
20
2
14
8.5
2.7
0.8
9.9
1.3
11.7
0.3
0.5
15.5
11.5
5.1
0.5
15.2
0.3
2.1
0.3
5.3
0.5
3.7
29

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Overall
Intake Cox Ferry Bridge
Scientific Name Common Name
Total Composition Total Composition Total Composition
Number Number Number
Pomoxis
annularis
P.
nigromaculatus
Pylodictis
olivaris
White Crappie 1 0.2
Black Crappie 12 2.0
Flathead Catfish 7 1.2
1 0.4
9 4.0 3 0.8
7 1.9
'Total number for American Shad and Striped Bass are presented but excluded from composition statistics. These
collections were made by the NCWRC, and the amount of effort and locations (Stripped Bass only) were not consistent
with the Duke Energy collections.
4.2.1 Exotic Species
Common Carp was the only exotic species (USGS 2021) collected during the study period representing
7.0 % of the total individuals collected across all sites, and was a dominant species present at the Cox
Ferry Bridge sampling location (Table 4-1).
4.3 Primary Growth Period
Primary growth of ectothermic fish species occurs when water temperatures are 10°C or above. The
conventional view on seasonal variation in fish growth in North America is that growth is fastest in the
spring and early summer, slows in the late summer and fall, and virtually stops in the winter (Gebhart
and Summerfelt 1978). The majority of fishes will have their highest densities shortly after the hatch
occurs when larvae are concentrated, and natural mortality has not yet reduced numbers. Feeding
competition is especially important during late spring through early summer when the bulk of fish are in
their early life stages. During this time, they are more susceptible to starvation (May 1974). This is a
critical stage in development, where larval fish have a short time period to initiate exogenous feeding
before starving (Ehrlich 1974; Miller et al. 1988).
4.3.1 Reproduction and Recruitment
Spawning and recruitment details for fish species collected in the Neuse River by the MWIS and Cox
Ferry Bridge boat ramp are described in detail in Table 4-2 and 4-3. Most of the fish species collected
prefer a spring — early summer spawning period. During this time period, egg and larval fish in the
vicinity of the H.F. Lee MWIS are most susceptible to entrainment.
Table 4-2. Known spawning and recruitment period of fish collected in the Neuse River by the MWIS and Cox
Ferry Bridge boat ramp from 2018-2021 (Jenkins and Burkhead, 1993).1
Common Name
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Hickory Shad2
American Shad2
Bowfin
American Eel
30

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Common Name
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Hickory Shade
Satinfin Shiner
Common Carp
Gizzard Shad
Threadfin Shad
Chain Pickerel
Eastern Mosquitofish
■
Blue Catfish
Channel Catfish
Longnose Gar
Redbreast Sunfish
Green Sunfish
Pumpkinseed
r
Bluegill
Redear Sunfish
White Shiner
Largemouth Bass
Striped Bass
Notchclip Redhorse
Striped Mullet'
Spottail Shiner
White Crappie
Black Crappie
Flathead Catfish
'This table illustrates the potential spawning window and potential peak spawning period in the Neuse River based
on a review of available literature and comparable southeastern rivers. Lighter shade indicates the spawning
window and darker shading indicates the peak spawning period.
2 Species spawns in marine environments.
31

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Table 4-3. Seasonal and daily activities of species collected in the Neuse River by the MWIS and Cox Ferry Bridge
boat ramp from 2018-2021 (Jenkins and Burkhead, 1993; Rohde et al, 2009).
Species (Common
Name)
Hickory Shad
Seasonal Activities (Spawning)
Spawning occurs in tidal
freshwater from April to early
June. Spawning is thought to
occur in main channels, flooded
swamps, and sloughs. Eggs are
slightly adhesive and
semidemersal, fecundity ranges
from 43,000-348,000 per
female.
Daily Activities (Feeding and Habitat)
Adults spend their life in the Atlantic Ocean; upon
reaching maturity, they enter freshwater from
late winter to early spring to spawn. Primarily
feeds on other fishes. Other prey includes squids,
fish eggs, small crabs, and various pelagic
crustaceans.
American Shad
Bowfin
Spawning occurs in tidal
freshwater from March through
May when water temperatures
are between 13-20° C.
Spawning typically occurs over
sand, gravel, silt, muck, cobble,
and boulders at water depths
usually less than 3 meters and
currents between 15-90 cm/sec.
Fecundity ranges between
116,000 and 659,000 eggs per
female.
Adults spend their life in the Atlantic Ocean; upon
reaching maturity, they enter freshwater from
late winter to early spring to spawn. Adults are
predominantly planktivorous; foods include algae,
copepods, ostracods, isopods, decapod larvae,
mayflies, mollusks, fish eggs, and fishes.
Spawning occurs from March to
early June at temperatures
between 16-19° C. Constructs
bowl shaped nests in depression
in shallow waters on bottom, in
dense vegetation, among
weeds, tree roots, or under logs,
nest may occur singly or in
groups. Eggs are demersal,
adhesive, covered with
filaments, and stick to
surroundings. Young remain in
nest guarded by male and are
also guarded when they leave
the nest.
American Eel
Inhabits slow water, usually found concealed in or
near vegetation, near or in cover such as logs,
branches, cut banks. Young eat insects and
crustaceans, adults' prey on fish and anything
catchable.
Spawning occurs offshore in the
Sargasso Sea.
Transparent, ribbon like leptocephalus larvae
passively drift westward and northward in major
currents for about one year. Metamorphosis to
glass eel occurs generally before reaching the
continental shelf. Young glass eels continue
migration coastward or upriver and darken in
color to elvers. Eels continue to grow and
transform to silver stage ells at sexual maturation.
Maturing eels depart for the sea; no adult has
been known to have return inshore. Dietary
32

Species (Common
Name)
Satinfin Shiner
Seasonal Activities (Spawning)
316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Daily Activities (Feeding and Habitat)
generalist, eating live and recently dead animal
material.
Spawning occurs between May
and mid -August when
temperatures are between 18 —
30°C. Fractional spawners that
deposit eggs in crevices of wood
and other structures.
Typically inhabit warm medium-sized streams to
major rivers of moderate to low gradient. Can be
found in pools, backwaters, and runs of shallow to
moderate depth over a variety of substrates.
Opportunistic feeder particularly on drifting items,
principally, microcrustaceans, terrestrial and
aquatic insects and algae.
Common Carp
Spawning occurs in the spring in
the shallow water and along
shorelines in reservoirs, over
vegetation, tree roots, or open
bottom, peak spawning occurs
between 15 and 20°C and
usually when aquatic vegetation
is flooded during April and May.
Spawning activities create lots
of turbidity, eggs attach to
vegetation or sink into the mud.
Fecundity for large females can
be over 2,000,000 ova.
Tolerant of a wide range of environmental
conditions. Typically found in the calm and mud -
bottomed waters of sluggish pools, backwaters,
and reservoirs where vegetation is present.
Common Carp are omnivores. They ingest
mouthfuls of the soft bottom sediments
(detritus), expels them into the water, and then
feed on the disclosed insects, crustaceans, annelid
worms, mollusks, weed and tree seeds, aquatic
plants, and algae.
Gizzard Shad
Spawning occurs from March to
August, usually between April
and June. Spawning occurs in
sloughs, ponds, lakes, and
reservoirs, usually at near -
surface depths ranging from 0.3
- 1.6 meters. Sometimes
spawning can occur over
vegetation or debris
Inhabits a variety of habitats but is considered a
pelagic schooling fish. Filter feeder, using
numerous fine gill rakers to strain plankton from
the water column and occasionally from the
bottom.
Threadfin Shad
Spawning occurs in aggregations
at near surface depths often
over structure. Eggs are
demersal and adhere to
vegetation and brush.
Inhabits a variety of habitats but is considered a
pelagic schooling fish. Filter feeders that strain
the plankton from the mid -water column, open
water.
Chain Pickerel
Spawning occurs from January —
March when water
temperatures range from 2 -
22°C. Spawning activity typically
occurs in shallow water up to 3
meters, usually among
submerged vegetation.
Inhabits clear, cool and warm, sluggish creeks,
rivers, ditches, natural and artificial ponds, and
lakes that are well vegetated. Generally found in
water less than 3 meters deep. Young feed
primarily on fish, small crustaceans, and insects.
Adults feed primarily on fish.
Eastern Mosquitofish
Spawning occurs during the
warm months of the year.
Prolific livebearer. The number
per brood ranges proportionally
to the size of the female,
typically one to more than 300.
Inhabits a wide range of conditions, but favors
vegetated areas of lakes, oxbows, ponds, drainage
ditches, sloughs, and backwaters of creeks and
rivers over a soft substrate of mud or and. Feeds
primarily on surface dwelling aquatic insects and
their larve.
33

Species (Common
Name)
Blue Catfish
Seasonal Activities (Spawning)
Spawning occurs between April
and July when water
temperatures are between 21 —
24°C. Nests are constructed in
sheltered areas by the male or
both sexes.
316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Daily Activities (Feeding and Habitat)
Inhabits large -river and reservoir systems with
deep swift channels and well -flowing pools.
Young fish feed on small invertebrates. Juvenile
and Adults feed on an array of invertebrates,
fishes, mollusk and occasionally frogs.
Channel Catfish
Spawning occurs from May
through July, between 21 and
30°C, nests are constructed in
sheltered areas.
Inhabit lakes, rivers, streams occupying a variety
of habitats and substrates. Young feed primarily
on plankton and insect larvae and larger fish eat
almost any available food items including other
fish.
Longnose Gar
Spawning typically occurs in
May and June. Spawning
typically occurs near the shore
in slow runs over boulder and
bedrock at a depth of 1 to 1.5
meters. Eggs are adhesive.
Redbreast Sunfish
Green Sunfish
Spawning occurs from June thru
August between 16 - 28°C.
Nests are constructed over sand
and gravel, often with overhead
cover, eggs are adhesive and
can form large clumps in the
nest, males guard eggs in the
nest.
Inhabits medium-sized streams to large rivers,
marshes, swamps, lakes, reservoirs, and estuaries.
Typically associated with weedy areas and other
cover in pools and backwaters. Feeds primarily on
fish.
Inhabits pool habitat, lakes, and rivers, associates
with woody debris, stumps, and undercut banks,
abundant in upstream reaches of reservoirs, rip -
rap shoreline, and rocky points. A generalist
predator that eats insects, crayfish, arthropods,
mollusks, and fishes.
Spawning occurs April through
August, constructs nests in
colonies as shallow depressions
in sand and gravel in pools in
sand and gravel near shelter
such as logs and vegetation,
males guard eggs in nests.
Inhabit slow pools and backwaters of low- and
moderate gradient streams and rivers, but also
occur in ponds, lakes, and reservoirs. Highly
tolerant of conditions such as turbidity and
drought and can rapidly colonize new habitats.
Food preferences are aquatic insects and small
fishes. Frequently associated with vegetation and
large rocky areas or rip -rap shorelines.
Pumpkinseed
Bluegill
Spawning occurs in April and
May between 16 and 21°C but
may extend to August.
Constructs solitary nests in open
shallow water on sand and
gravel. Males guard eggs within
the nest.
Inhabits ponds, lakes, reservoirs, creeks, and
streams. Feeds on microcrustaceans, aquatic
insects, snails, small clams, and some small fishes.
Spawning occurs from May
through September, generally
most of the growing season,
peaking in June. Fish construct
nests in aggregations in shallow
water on sand or gravel
bottoms, eggs are guarded by
male.
Inhabits pools, lakes, streams, and rivers, with
vegetation, overhead cover, structure. Young are
planktivorous, adults eat aquatic and terrestrial
insects.
Redear Sunfish
Generally, spawning occurs from Inhabits lacustrine ecosystems, generally found in
April through August, with the vegetated lakes, ponds, reservoirs, streams,
34

Species (Common
Name)
White Shiner
Seasonal Activities (Spawning)
316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Daily Activities (Feeding and Habitat)
onset of temperatures between
20 - 21°C. Nests found in
aggregate and are constructed
in waters shallower than 2
meters, often near vegetation
and in colonies, males guard
eggs in the nest.
Spawning occurs from May
through July with temperatures
between 17.5 — 24°C. Spawning
is typically associated with the
nest -building chubs or other
nest builders.
rivers, or backwater areas. Generally, feeds on
small prey, snails, and small mussels and clams,
small insects and fishes.
Inhabits pools within cool and warm streams of
moderate gradient. Primarily feeds on aquatic
and terrestrial insects.
Largemouth Bass
Striped Bass
Spawning occurs late April to
June when temperatures are
between 16 - 18°C, with peak
spawning occurring in April and
May. Nests are generally located
in sand or gravel at the base of
logs, stumps, and emergent
vegetation along shorelines
usually at depths of 0.6 meters.
Both male and female guard
eggs in nest.
Inhabits a wide variety of habitats. Prefer warm,
calm, and clear water and thrive in slow streams,
farm ponds, lakes, and reservoirs. Young feed
primarily on plankton, insects, small fishes, adults
feed on fishes, frogs, and almost any other animal
of appropriate size.
Spawning occurs from March
through May with an optimal
temperature of 17 - 18°C.
Striped Bass spawn in roving,
surface and near -surface
congregations. Eggs are semi -
buoyant or buoyant and non-
adhesive. Fecundity ranges
from 15,000 to 4,000,000
mature ova.
Anadromous stripers typically spawn in the lower
tidal and non -tidal sections of large rivers in
salinities less than 10 (ppt). Males tend to ascent
rivers before females and stage in the rock-strewn
areas of some rivers, such as the Fall Zone. Adults
are predaceous generalist, usually becoming
piscivorous after the early juvenile stage.
Notchclip Redhorse
Striped Mullet
Spawning occurs in April and
May when water temperatures
range from 11- 15°C. Spawning
is typically associated with
shallow riffles over gravel and
rubble.
Inhabits large streams, small to big rivers, and
natural and artificial lakes. Feeds on insect larvae,
microcrustaceans, crayfishes, mollusks, algae and
detritus.
Spawning occurs from
November to January offshore
in and around the continental
shelf. Fecundity estimates
range up to 4,000,000 eggs per
female.
Inhabits shallow waters of the ocean, estuaries,
tidal pools, high marshes and low -salinity creeks.
Only the adults enter fresh water and migrate up
to the Fall Zone. Adults are herbivorous
detritivore and feeds on a high -cellulose diet.
Spottail Shiner
Spawning occurs from mid -April
through mid -June. Spawning
occurs in large aggregations and
in groups of two to five
Inhabits an array of lotic habitats, ranging from
typically clear, mostly rocky, moderate gradient
streams to often turbid, sandy, muddy, silty, and
sluggish water. Feeds on microcrustaceans,
35

Species (Common
Name)
White Crappie
Black Crappie
Seasonal Activities (Spawning)
316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Daily Activities (Feeding and Habitat)
individuals. Fecundity ranges
from 100 — 8,898 eggs.
aquatic and terrestrial insects, young shiners, fish
eggs, and plant material.
Spawning occurs from March
through July throughout the
species range. Spawning occurs
when water temperatures are
between 16 — 20°C. Fecundity
ranges from 2,900 to 213,000
mature eggs.
Inhabits warm ponds, lakes, reservoirs and pools
of low to moderate gradient streams and rivers.
Young and juvenile fish feed on crustaceans and
insets. Adults feed on a variety of fishes, insects,
and other aquatic invertebrates including
plankton.
Spawning occurs from late
February to early June. Nests
are constructed in shallow water
to moderately deep water (to 6
meters), sometimes in close
proximity to each other and
usually associated with
vegetation or structure, larvae
are pelagic and move inshore as
larger juveniles.
Inhabits vegetated areas of backwaters in streams
and rivers in ponds and reservoirs, aggregates
around structure and associates with aquatic
vegetation, fallen trees, and stumps. Young Black
Crappie feed on aquatic insects and small fishes
and adults feed primarily on fishes.
Flathead Catfish
Spawning occurs in June and
July. Nests consist of cleaned
substrate near cover or in a
cavity. Fecundity ranges from
6,900 —11,300 eggs.
Inhabits warm large streams, big rivers, lakes and
reservoirs. In streams, young and juveniles are
usually associated with riffles, while larger fish
favor moderate to deep pools with cover. Young
feed on microcrustaceans and insect larvae;
adults feed on crayfishes, clams, and particularly,
fishes.
4.4 Species and Life Stages Susceptible to Impingement and
Entrainment
The HFLCCS closed -cycle cooling system is compliant with impingement BTA requirements of the Rule.
As such, no species or life stages are anticipated to be highly susceptible to impingement at the H.F. Lee
MWIS (Table 4-4). While some species may have the potential to be entrained, based on the
operational parameters of the MWIS in the Intake Canal (low DIF and TSV), interactions with aquatic
organisms are expected to be limited with no potential for adverse environmental impacts.
4.4.1 Impingement
The degree of vulnerability to impingement exhibited by adult and juvenile fish species depends upon
biological and behavioral factors including seasonal fish community structure, spawning effects on
distribution, habitat surrounding intake structures, high flow events, and attraction to the flow
associated with the intake. In addition, swimming speed, intake velocity, screen mesh size, trash rack
spacing, and other intake configurations will also affect the susceptibility to impingement. For example,
clupeids have high susceptibility to impingement based on multiple factors such as schooling behavior,
distribution in the water column, negative rheotactic response to intake flows, and poor swimming
performance in winter months due to lower water temperatures (Loar et al 1978).
36

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
No ongoing or relevant impingement studies have been performed at the HFLCCS. The MWIS withdraws
water from a constructed Intake Canal off the mainstem Neuse River (Figure 2-1) that provides makeup
to a closed cooling system pond. In the Rule, facilities with closed cycle cooling are compliant with the
impingement reduction standard.
4.4.2 Entrainment
Ichthyoplankton (egg and larval life stage of fishes) exhibit the highest degree of susceptibility to
entrainment based on body size and swimming ability. Therefore, an organism is most susceptible to
entrainment for a portion of their life cycle. Larger juvenile and adult life stages have the swimming
ability to avoid entrainment. Life history characteristics can influence the vulnerability of a fish species
to entrainment. For example, broadcast spawners with non -adhesive, free-floating eggs can drift with
water currents and may become entrained in a MWIS, while nest -building species with adhesive eggs
are less susceptible to entrainment during early life stages.
When considering the spawning preference of the species present in the Neuse River (i.e., Cox Ferry
Bridge) and the Intake Canal (Table 4-3) and the habitat in the immediate vicinity of the MWIS (low flow,
stagnant water; Figure 2-1), this area is not preferred spawning habitat for many of the species
collected. These factors alone result in a low entrainment potential for eggs and larvae.
Table 4-4. Entrainment potential for fish (egg and larvae) species present near the HFLCCS MWIS.
Species (Common Spawning Habitat
Name) Use/Preference
Anadromous open water
Hickory Shad spawner. Eggs are slightly
adhesive and semidemersal.
Potential for Entrainment'
Unlikely due to habitat and spawning preference.
None were collected in the Intake Canal.
American Shad
Bowfin
American Eel
Anadromous open water
spawner. Eggs are slightly
adhesive and semidemersal.
Unlikely due to habitat and spawning preference.
None were collected in the Intake Canal.
Cavity nester in shallow waters
on bottom, in dense vegetation,
among weeds, tree roots, or
under logs, nest may occur
singly or in groups. Eggs are
demersal, adhesive, covered
with filaments, and stick to
surroundings.
Unlikely due to habitat and spawning preference,
and low abundance.
Catadromous offshore spawner Unlikely due to habitat and spawning preference,
in the Sargasso Sea. and low abundance.
Satinfin Shiner
Fractional spawners that deposit
adhesive eggs in crevices of
wood and other structures.
Unlikely due to habitat and spawning preference.
No collections in the Intake Canal.
Common Carp
Lays adhesive eggs in shallow Unlikely due to habitat and spawning preference,
vegetation. and low abundance.
Gizzard Shad
Random, aggregate, shallow
water surface spawners.
Adhesive eggs.
Possible due to the habitat around the MWIS,
abundance and spawning behavior.
Threadfin Shad
Aggregate, shallow water
surface spawners. Adhesive
eggs.
Possible due to the habitat around the MWIS,
abundance and spawning behavior.
37

Species (Common
Name)
Chain Pickerel
Spawning Habitat
Use/Preference
Spawns along vegetated
substrate in shallow water,
approximately < 3.0 meters.
Eastern Mosquitofish
Live barer with internal
fertilization.
Blue Catfish
Cavity nesters.
316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Potential for Entrainment'
Unlikely due to habitat and spawning preference.
No collections in the Intake Canal.
Unlikely due to life history requirements, and low
abundance. No collections in the Intake Canal.
Unlikely due to habitat and spawning preference.
No collections in the Intake Canal.
Channel Catfish
Cavity nesters.
Unlikely due to habitat and spawning preference,
and low abundance.
Longnose Gar
Shoreline spawner in slower
moving water.
Possible due to the habitat around the MWIS,
abundance and spawning behavior.
Redbreast Sunfish
Green Sunfish
Pumpkinseed
Bluegill
Construct nests over silt -free or
lightly silted sand and gravel in
cover.
Unlikely due to habitat and spawning preference.
No collections in the Intake Canal.
Construct nests around
vegetation.
Unlikely due to habitat and spawning preference,
and low abundance.
Constructs nest in open shallow
water on sand and gravel
Unlikely due to habitat and spawning preference,
and low abundance.
Nest generally constructed in
shallow waters.
Possible due to species abundance.
Redear Sunfish
White Shiner
Largemouth Bass
Striped Bass
Nest generally constructed in
shallow waters.
Unlikely due to habitat and spawning preference,
demersal and adhesive eggs, parental care of nest
until larvae swim -up.
Spawning is typically associated
with the nest -building chubs or
other nest builders.
Unlikely due to habitat and spawning preference.
Nest constructed in shallow
areas of 0.3 - 2 meters.
Unlikely due to habitat and spawning preference,
and low abundance.
Notchclip Redhorse
Striped Mullet
Spottail Shiner
White Crappie
Black Crappie
Anadromous, roving, surface,
and near -surface congregations.
Unlikely due to habitat and spawning preference.
No collections in the Intake Canal.
Spawning occurs in shallow
riffles over gravel and rubble.
Unlikely due to habitat and spawning preference,
and low abundance.
Offshore spawner.
Unlikely due to habitat and spawning preference.
No collections in the Intake Canal.
Spawning occurs in large
aggregations and in groups of
two to five individuals.
Unlikely due to habitat and spawning preference,
and low abundance.
Construct nests around
vegetation close to other nests.
Unlikely due to habitat and spawning preference,
demersal and adhesive eggs, parental care of nest
until larvae swim -up, and low abundance.
Flathead Catfish
Construct nests around
vegetation close to other nests.
Unlikely due to habitat and spawning preference,
demersal and adhesive eggs, parental care of nest
until larvae swim -up, and low abundance.
Opportunistic cavity nester.
Unlikely due to habitat and spawning preference.
No collections in the Intake Canal.
'Low TSV of the MWIS and closed cycle cooling minimizes the potential for entrainment for all species based on
their ability for avoidance of the intake. Species with floating eggs would continue to have some susceptibility to
entrainment.
38

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
4.4.3 Selected Species
A subset of species present (dominant species) near the MWIS (i.e., Intake Canal) with the highest
likelihood to be entrained was selected for detailed life history descriptions including reproduction,
recruitment, and peak abundance as detailed in excerpts from Freshwater Fishes of Virginia (Jenkins
1993). The habitat in the immediate vicinity of the MWIS is described as shallow, low -flow and
sometime stagnant, and surrounded by riprap. Most fish species are using the vicinity of the CWIS for
staging or foraging. Of the species present, Longnose Gar, Bluegill, Gizzard Shad, and Threadfin Shad
have the highest likelihood of being entrained based on species abundance (Bluegill and Longnose Gar)
and spawning preference (Gizzard Shad and Threadfin Shad).
Gizzard Shad
Gizzard Shad are native to the Atlantic and Gulf Slopes and to interior drainages of eastern and central
North America. The Gizzard Shad is characterized as a pelagic, schooling fish that occurs in a variety of
habitats. It inhabits pools and runs of medium streams to rivers of low or moderate gradient, and
populates reservoirs, lakes, swamps, floodwater pools, estuaries, brackish bays, and occasionally,
marine waters (R. R. Miller 1960, 1964).
Spawning typically occurs from March through August (Miller 1960) within freshwater sloughs, ponds,
and reservoirs, usually at near -surface depths (0.3 - 1.6 meters) but sometimes as deep as 15 meters,
and sometimes over vegetation or debris (Gunter 1938, Miller 1960, Shelton and Grinstead 1973, Jones
et al. 1978, Wang and Kernehan 1979). Spawning groups swim near the surface and roll about a mass,
releasing egg and sperm (Miller 1960). Eggs are demersal and adhere to algae, rocks, or other objects
(R. R. Miller 1960, 1964). Fecundity ranges from 22, 400 to 543,910 ova (Bodola 1966, Schneider 1969).
Threadfin Shad
The native range of the Threadfin Shad extends from the lower Mississippi basin, the Gulf Slope and
Peninsular Florida to Guatemala and Belize (R. R. Miller 1964). Threadfin Shad is described as a pelagic
schooling fish of fresh and brackish water. In fresh water, Threadfin Shad inhabit medium sized streams
to rivers of low to moderate gradient (R. R. Miller 1964 and Burns 1966). Stream -dwelling Threadfin
Shad often congregate in turbulent zones below dams, and generally tend to associate with current
more than Gizzard Shad (Pflieger 1975).
Threadfin Shad typically spawn in freshwater from April through July when water temperatures are
between 14.4 and 27.2°C (Burns 1966, R.R Miller 1964, Johnson 1971, Jones et al. 1978). Demersal
adhesive eggs are often shed over submerged structures such as plant beds and brush (Berry et al. 1956,
Gerdes 1961, R. R. Miller 1964, Rawstron 1964, Lambou 1965, and Burns 1966). Estimated egg counts
range from 800 to 21,000 (Jones et al. 1978), but because individuals may repeatedly spawn over a
season, individual egg counts may grossly underestimate fecundity.
Bluegill
Bluegill are native to the Great Lakes -St. Lawrence and Mississippi basins, the Atlantic slope probably
from North Carolina southward, and the Gulf slope west to Texas. This species of fish is the most widely
introduced species of Sunfish (Jenkins 1993). Bluegills are found in pools and backwaters of low to
moderate -gradient creeks, streams, and rivers, and in all types of lacustrine habitats. The Bluegill
occupies clear and turbid waters, hard and silted substrates (Graham and Hastings 1984).
39

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Spawning likely occurs from May to August or September, typically over nest constructed by males in
shallows on sand or gravel; nest frequently occur in colonies (Coggeshall 1924, Crowe 1959, and Gross
and MacMillan 1981). Bluegill average five spawning events and produce about 80,000 eggs per year
(Estes 1949).
Longnose Gar
Longnose Gar are native to a large portion of eastern North America, including North Carolina.
Longnose Gar are found in medium-sized streams to large rivers, marshes, swamps, lakes, reservoirs,
and estuaries. They are frequently associated with weedy areas over cover in pools and backwaters
(Jenkins and Burkhead 1993).
Spawning typically occurs during the spring and early portion of summer along banks in slow runs over
boulders and bedrock. Adhesive eggs are scattered over the bottom singly and in small clusters (Jenkins
and Burkhead 1993). Fecundity ranges from 6,200 to 77,150 eggs (Carlander 1969).
4.5 Threatened, Endangered, and Other Protected Species
Susceptible to Impingement and Entrainment at the MWIS
The Rule requires the permittee to document the presence of federally listed species and designated
critical habitat in the action area (see 40 CFR 125.98[f]). For the purpose of defining listed species, the
action area is defined as a rectangle that was 3 miles east -west by 2 miles north -south that
encompassed the HFLCCS cooling pond and the Neuse River near the MWIS.
A desktop review of available resources was performed to develop a list of species with protected,
endangered, or threatened status that might be susceptible to impingement and entrainment at the
MWIS at the HFLCCS. The United States Fish and Wildlife Services (USFWS) map -based search tool
(Information for Planning and Consultation [IPaC]) was used to identify state or federally listed rare,
threatened, or endangered (RTE) aquatic species or critical habitat designations within the defined
search area. Listed species spatial occurrence data from the North Carolina Natural Heritage Program
was cross-referenced spatially relative to the HFLCCS MWIS. Anadromous federally listed species and
designated critical habitat under the National Marine Fisheries Service jurisdiction were considered, but
federally listed marine species were not.
State and federally listed rare, threatened, or endangered aquatic species or critical habitat designations
occurring within the vicinity of the HFLCCS, are provided in Table 4-5. Federal species of concern and
candidate species were omitted from the list (unless they were also state threatened or endangered), as
there are no requirements to address those species under the Rule or Section 7 of the ESA. The
following materials were reviewed to develop the species list in Table 4-5:
• IPaC (https://ecos.fws.gov/ipac/) (USFWS 2021)
• North Carolina Department of Natural and Cultural Resources (NCDNCR) Natural Heritage
Program Data explorer listed species element occurrence data (NCDNCR 2021)
• National Oceanic and Atmospheric Administration NOAA)
(https://www.fisheries.noaa.gov/species-directory/threatened-endangered) (NOAA 2021)
40

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Fish sampling conducted near the HFLCCS discussed in Section 4.2 of this report resulted in no
collections of federally or state -listed species from 2015 to 2020. The USFWS IPaC search indicated that
the Atlantic Pigtoe (Fusconaia masoni), Carolina Madtom (Noturus furiosus), Neuse River Waterdog
(Necturus lewisi), and Tar River Spinymussel (Elliptio steinstansana) might be affected by activities in the
search location (3.0 x 2.0 mile rectangle encompassing the MWIS). Both the IPaC search and the NCNHP
search indicated that the Neuse River Waterdog and its critical habitat are within the search area. The
NOAA threatened and endangered species searches indicated that Atlantic Sturgeon and its critical
habitat are in the Neuse River. Critical habitat for the Atlantic Sturgeon and the Neuse River Waterdog
is designated only for the main stem portion of the Neuse River and does not include waters or habitat
in the MWIS intake canal or the side channel (Figure 2-1).
Table 4-5. Summary of Rare (R), Threatened (T), Proposed Threatened (PT) or Endangered (E) aquatic species
listed for the area around the HFLCCS and record of occurrence or potential to occur near the MWIS.
Source
NOAA
Scientific Name
Common Name Federal State Record of occurrence or potential
Status Status to occur near the HFLCCS MWIS
Acipenser Shortnose
brevirostrum Sturgeon
E E
No record of occurrence. Unlikely
to occur, preferred habitat is not
present in the vicinity of the
MWIS.
NOAA
Acipenser Atlantic
oxyrinchus Sturgeon
E E
No record of occurrence. Unlikely
to occur, preferred habitat is not
present in the vicinity of the
MWIS.
Critical habitat designated on
Neuse River mainstem and not for
the intake canal or side channel.
No impact to Critical Habitat.
Elliptio Tar River Unlikely to occur, preferred
USFWS steinstansana Spinymussel E E habitat is not present in the
vicinity of the MWIS.
Unlikely to occur, preferred
USFWS Fusconaia Atlantic Pigtoe PT E habitat is not present in the
masoni vicinity of the MWIS.
Unlikely, preferred habitat is not
present in the vicinity of the
NCNHP Neuse River MWIS.
Necturus Lewis i T SC Critical habitat designated on
USFWS Waterdog
Neuse River mainstem and not for
the intake canal or side channel.
No impact to Critical Habitat.
Unlikely to occur, preferred
habitat is not present in the
Carolina vicinity of the MWIS.
USFWS Notorus furiosus Madtom E T Extirpated from main stem of
Neuse River. Only extant and rare
occurrences are in a large
tributary downstream.
41

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
4.6 Documentation of Consultation with Services
In preparing this response package for compliance with CWA §316(b), there has been neither public
participation, nor coordination undertaken with EPA, NMFS, or USFWS, collectively known as the
Services.
4.7 Information Submitted to Obtain Incidental Take Exemption or
Authorization from Services
Duke Energy has not submitted information to obtain incidental take exemption or authorization from
the Services for the HFLCCS MWIS.
4.8 Methods and Quality Assurance Procedures for Field Efforts
Data presented in this report were compiled from fish surveys conducted by the DEP Water Resources
team and the NCWRC. All DEP data were collected according to NCDEQ approved procedures under the
DEP Biological Laboratory Certification number 006.
4.9 Protective Measures and Stabilization Activities
There are no protective measures or stabilization activities associated with the HFLCCS MWIS.
4.10 Fragile Species
In the Rule, the USEPA identifies 14 species (§125.92(m)) of fish as fragile or having post -impingement
survival rates of less than 30 percent. The occurrence of fragile species near the HFLCCS MWIS in the
Neuse River has been documented by DEP and the NCWRC (Table 4-1 and 4-6).
Table 4-6. List of fragile species as defined by the EPA and their occurrence near the HFLCCS MWIS in the Neuse
River.
Scientific Name
Common Name
Alosa pseudoharengus
Alewife
Alosa sapidissima
American Shad
Clupea harengus
Occurrence in the vicinity of
the HFLCCS MWIS
No
Yes
Atlantic Herring No
Doryteuthis (Amerigo) pealeii Atlantic Longfin Squid
Anchoa mitchilli Bay Anchovy
Alosa aestivalis Blueback Herring
Pomatomus saltatrix Bluefish
Poronotus triacanthus Butterfish
Lutjanus griseus Grey Snapper
Alosa mediocris Hickory Shad
Brevoortia tyrannus Atlantic Menhaden
Osmerus mordax Rainbow Smelt
Etrumeus sadina Round Herring
Engraulis eurystole Silver Anchovy
No
No
No
No
No
No
Yes
No
No
No
No
42

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
5 Cooling Water System Data [§122.21(r)(5)(i)]
The information required to be submitted per 40 CFR §122.21(r)(5), Cooling water system data, is
outlined as follows:
(i) A narrative description of the operation of the cooling water system and its relationship to
cooling water intake structures; the proportion of the design intake flow that is used in the system; the
number of days of the year the cooling water system is in operation and seasonal changes in the
operation of the system, if applicable; the proportion of design intake flow for contact cooling, non -
contact cooling, and process uses; a distribution of water reuse to include cooling water reused as
process water, process water reused for cooling, and the use of gray water for cooling; a description of
reductions in total water withdrawals including cooling water intake flow reductions already achieved
through minimized process water withdrawals; a description of any cooling water that is used in a
manufacturing process either before or after it is used for cooling, including other recycled process
water flows; the proportion of the source waterbody withdrawn (on a monthly basis);
(ii) Design and engineering calculations prepared by a qualified professional and supporting data to
support the description required by paragraph (r)(5)(i) of this section; and,
(iii) Description of existing impingement and entrainment technologies or operational measures and
a summary of their performance, including but not limited to reductions in impingement mortality and
entrainment due to intake location and reductions in total water withdrawals and usage.
Each of these requirements is described in the following subsections.
5.1 Description of Cooling Water System Operation
[§122.21(r)(5)(i)]
The HFLCCS circulating water system is a closed -loop system with cooling water recycled and reused in
the steam turbine condenser. The purpose of the circulating water system is to supply cooling water to
the steam turbine condenser and to be used as service water for various plant uses such as fire water,
plant area wash water, and makeup water to the HRSG (after purification). The heat transferred to the
circulating water in the condenser is rejected to the atmosphere by the evaporation process in the
cooling pond. The MWIS is operated as necessary to maintain cooling pond elevation.
5.1.1 Cooling Water System Operation
Two vertical circulating water pumps, each rated at 189.36 MGD (131,500 gpm) supply cooling water to
the condenser and additional circulating water to the auxiliary cooling water heat exchangers. Heated
water from these systems is returned to the cooling pond through the circulating water piping. The
heated circulating water is cooled by the cooling pond and the cycle is repeated. The HFLCCS has one
cooling pond and system flow is counterclockwise. Figure 5-1 provides an aerial of the HFLCCS closed
cycle cooling system.
43

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
. ' aJ
•
'��i•.- 4:ai'-•U. only
;
••
•
Figure 5-1. HFLCC cooling pond general arrangement (denoted locations are approximate).
At full pool elevation and pond volume of 173.7 million cubic feet, the average residence time is
approximately 3.6 days for a design flow of 250,000 gpm. The heat load of the pond is 1.02 MW per
acre which is average for a cooling pond system. The cooling pond is operated to maintain an elevation
between 79.5 and 79.8 feet. Table 5-1 provides relevant pond elevations.
Table 5-1. HFLCC Cooling Pond elevations.
Characteristic Elevation, feet
Average cooling pond dike crest 82.0
Design high 80.0
Normal operating 79.5 — 79.8
Minimum for reliable lake forwarding pump operation 76.25
Lake bottom elevation at lake forwarding pumphouse 76.0
Most of water losses in the circulating water system is through evaporation in the cooling pond. Losses
are compensated by the cooling pond makeup pumps located in the MWIS. Typically, evaporation is
higher during the hot summer months (July — August) and therefore the makeup pumps would be
expected to operate more during these months.
5.1.2 Proportion of Design Flow Used in the Cooling Water System
Water withdrawals from the Neuse River to support HFLCCS operations from 2017 through 2021 are
provided in Table 3-1 (Section 3.4). Based on the engineering design water balance diagram (Figure 3-1),
approximately 99.9 percent of the water withdrawn from the cooling pond is used for condenser
cooling. The remainder is used as service water for various plant uses such as fire protection water,
chiller system makeup, boiler wash water, and HRSG makeup water. Table 5-2 provides the proportion
of the 35.0 MGD DIF withdrawn during the 2017-2021 period.
44

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Table 5-2. Percent Monthly Proportion of Design Flow Withdrawn at the HFLCCS.
Month 2017 2018 2019 2020 2021 Average
January 11.3 13.8 8.1 8.0 4.2 9.1
February 12.4 8.4 5.4 7.6 0.0 6.8
March 11.9 11.0 15.3 11.7 0.0 10.0
April 34.9 16.7 11.2 17.3 13.5 18.7
May 12.3 5.2 15.1 9.0 11.5 10.6
June 13.9 25.7 19.5 5.6 20.7 17.1
July 22.9 16.9 19.0 24.8 9.0 18.6
August 20.3 8.3 17.9 14.2 19.4 16.0
September 11.8 9.5 15.1 11.8 8.9 11.4
October 20.7 8.6 12.7 11.9 17.3 14.2
November 7.7 7.7 11.8 12.3 1.9 8.3
December 23.5 21.5 21.5 8.8 8.9 13.8
Although historical averages are not necessarily indicative of future withdrawals, only 12.9 percent of
the DIF was withdrawn from the Neuse River from 2017 through 2021.
5.1.3 Cooling Water System Operation Characterization
Operation of the cooling water system results in an increased makeup water demand and makeup water
pump operation. As presented in Section 3.3, the MWIS was nearly continuously available for operation
during the 2017-2021 period with an average daily operation of approximately 6.2 hours each day (i.e.,
about 25.6% each day) assuming single pump operation. HFLCCS steam turbine and/or combustion
turbine outages typically occur in the spring and/or fall.
Monthly total flow data during the 2017-2021 period is provided in Figure 5-2. MWIS withdrawals
during the summer months (i.e., May to September) are typically higher than the remainder of the year
due to increased cooling pond evaporation resulting from higher ambient temperatures.
45

400.0
350.0
300.0
250.0
c
0
E 200.0
0
2 150.0
100.0
50.0
0.0
li
i
316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
li
1
1
ddid .
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
■ 2017 ■ 2018 ■ 2019 2020 ■ 2021
Figure 5-2. Monthly Total MWIS Withdrawals at HFLCCS
At the administrative single pump operation (12,150 gpm) the calculated TSV is 0.48 fps while at the AIF
(3,132 gpm) the calculated TSV is 0.12 fps. Appendix C provides TSV calculations.
5.1.4 Distribution of Water Reuse
The distribution of water reuse does not apply to HFLCCS because this facility does not reuse cooling
water as process water, reuse process water for cooling purposes, or use grey water for cooling
purposes.
5.1.5 Description of Reductions in Total Water Withdrawals
The HFLCCS is a single combined cycle unit, natural gas -fired electric generating facility with a current
generating capacity of 1,059 MW. As shown in Table 5 3, the HFLCCS is more efficient in cooling water
usage, producing 1.8 times more power output while using about the same amount of cooling water
than the now -demolished former coal-fired units.
Table 5-3. Comparison of HFLCCS to former coal-fired units.
Characteristic
Demolished coal-fired units HFLCCS
Total Generation, MW
382 1,059
Fuel Coal Natural Gas
Total Design Cooling Water Flow, MGD 372 379
Cooling System Closed -Cycle Closed -Cycle
MW/MGD Ratio 1.03 2.80
46

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
5.1.6 Description of Cooling Water Used in Manufacturing Process
HFLCCS cooling water is not used in a manufacturing process either before or after the water is used for
cooling.
5.1.7 Proportion of Source Waterbody Withdrawn
Withdrawal from the Neuse River is dependent on the cooling pond makeup water demand, maximum
pump capacity, and water losses due to evaporation and system losses. Monthly average Neuse River
flows and monthly average HFLCCS water withdrawals during the 2017-2021 period are provided in
Table 5-4. The percent of source water withdrawal for cooling pond makeup ranges from a low of 0.00
percent (February 2021, March 2021) to a high of 1.67 percent (October 2017).
Table 5-4. HFLCCS Percent of Source Waterbody (Neuse River) Withdrawal
Month 2017 2018 2019 2020 2021
January 0.22 0.61 0.07 0.12 0.03
February 0.55 0.20 0.07 0.05 0.00
March 0.52 0.23 0.12 0.23 0.00
April 0.46 0.27 0.10 0.49 0.29
May 0.10 0.11 0.59 0.13 0.94
June 0.27 1.04 0.51 0.06 0.48
July 1.30 1.32 0.73 1.05 0.13
August 1.39 0.15 0.99 0.16 0.66
September 0.56 0.06 0.54 0.15 0.84
October 1.67 0.13 0.99 0.22 0.91
November 0.65 0.07 0.65 0.10 0.18
December 1.25 0.04 0.43 0.08 0.61
Annual 0.45 0.17 0.27 0.15 0.16
Average
During the 2017-2021 period of record for this report, the HFLCCS average withdrawal was 0.24 percent
of the Neuse River source waterbody flow.
5.2 Design and Engineering Calculations [§122.21(r)(5)(ii)]
The following table provides calculated TSV values. Appendix C presents the engineering calculations of
TSV for the MWIS bar rack as prepared by a qualified professional.
47

Table 5-4. MWIS TSV Calculations
Flow Scenario
AIF (2017-2021)
Rated flow (one pump)
One pump at design low water elevation
Theoretical maximum possible (two
pumps)10
316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Calculated TSV
0.12 fps
0.48 fps
0.49 fps
0.96 fps
Low level elevation = 57.0 feet, High level elevation = 79.0 feet
5.3 Description of Existing Impingement and Entrainment
Reduction Measures [§122.21(r)(5)(iii)]
The HFLCCS achieves substantial reductions in entrainment and impingement by means of flow
reduction. The underlying assumption for entrainment is that entrainable organisms have limited or no
motility and passively move with the water entering the power plant cooling water structure; therefore,
reduction in flow results in a commensurate reduction in entrainment. At HFLCCS, this flow reduction is
achieved through the use of a closed -cycle recirculating cooling pond with minimized makeup.
Utilization of closed -cycle cooling results in a flow reduction of 98.8 percent relative to OTC at HFLCCS
using the 2017-2021 period of record AIF.
In addition to providing a significant reduction of organisms entrained, the lower flows associated with
closed -cycle cooling also result in a commensurate reduction in the potential for impingement at the
facility. As the MWIS bar rack screens have a maximum TSV of 0.48 fps with single pump operation, the
risk of impingement is essentially eliminated. The annual average AIF of 4.51 MGD at HFLCCS (see
Section 3.4) is small and the calculated TSV is 0.12 fps. Thus, the MWIS A01 would not extend beyond
the face of the bar rack and is likely substantially less than the source waterbody current. Based on the
AOI calculations, impingement at HFLCCS is negligible and more likely approaches zero.
5.3.1 Best Technology Available for Entrainment
To aid the Director in making a BTA determination, the following is provided to support the conclusion
that the existing HFLCCS configuration and operation results in the maximum reduction in entrainment
warranted and no additional entrainment controls are warranted.
Most importantly, the HFLCCS uses closed -cycle cooling, which minimizes entrainment through flow
reduction. The flow reduction achieved, compared to OTC, is calculated at 98.8 percent based on the
AIF during the period of record. The EPA allows broad flexibility in the BTA determination for individual
facilities, but also supports closed -cycle cooling as a BTA option for entrainment as confirmed through
this statement in the preamble to the Rule:
"Although this rule leaves the BTA entrainment determination to the Director, with the
possible BTA decisions ranging from no additional controls to closed -cycle recirculating
systems plus additional controls as warranted, EPA expects that the Director, in the site -
specific permitting proceeding, will determine that facilities with properly operated
10 Although theoretically possible, pump controls would prohibit two pump operation.
48

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
closed -cycle recirculating systems do not require additional entrainment reduction
control measures."
Closed -cycle cooling as a potential entrainment BTA is further reiterated in the Response to Public
Comments document, where EPA states:
"EPA has made it clear that a facility that uses a closed -cycle recirculating system, as
defined in the rule, would meet the rule requirements for impingement mortality at §
125.94(c)(1). This rule language specifically identifies closed -cycle as a compliance
alternative for the [impingement mortality] performance standards. EPA expects the
Director would conclude that such a facility would not be subject to additional
entrainment controls to meet BTA."
The final rule for new facilities as well as the new units provision within the Rule provide similar support
for closed -cycle cooling as entrainment BTA at HFLCCS:
• The final Rule for new facilities published in the Federal Register on December 18, 2001 and
with an effective date of January 17, 2002 does prescribe BTA for entrainment, which HFLCCS
meets. Regulations are more stringent for new facilities than for existing facilities. By virtue of
meeting the most stringent entrainment BTA criteria (i.e., applicable to new facilities), HFLCCS is
compliant for entrainment BTA under the final Rule for existing facilities.
• If HFLCCS were classified as a new unit at an existing facility, the station would be in compliance
with the more stringent requirements stated at §125.94(e), BTA standards for impingement
mortality and entrainment for new units at existing facilities.
Beyond this regulatory guidance, the number of organisms expected to be entrained at HFLCCS is very
low. Since entrainment is proportional to flow, reductions in flow equate to commensurate reductions
in entrainment. The use of closed -cycle cooling as compared to an equivalent OTC facility is estimated
to reduce entrainment by 98.8 percent (AIF flow).
49

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
6 Chosen Method(s) of Compliance with
Impingement Mortality Standard [§122.21(r)(6)]
The information required to be submitted per 40 CFR § 122.21(r)(6) is as follows:
The owner or operator of the facility must identify the chosen compliance method for the
entire facility; alternatively, the applicant must identify the chosen compliance method
for each cooling water intake structure at its facility. The applicant must identify any
intake structure for which a BTA determination for Impingement Mortality under 40 CFR
125.94 (c)(11) or (12) is requested.
The Rule at 40 CFR 125.94(c) gives existing facilities seven BTA options for achieving impingement
mortality compliance. These are listed below. A facility needs to implement only one of these options.
1. Operate a closed -cycle recirculating system as defined at 40 CFR 125.92(c)(1) (this includes wet,
dry or hybrid cooling towers, a system of impoundments that are not WOTUS, or any
combination thereof);
2. Operate a cooling water intake structure that has a maximum design through -screen velocity of
0.5 fps or less;
3. Operate a cooling water intake structure that has a maximum actual through -screen velocity of
0.5 fps or less;
4. Operate an existing offshore velocity cap that is a minimum of 800 feet offshore and has bar
screens or otherwise excludes marine mammals, sea turtles, and other large aquatic organisms;
5. Operate a modified traveling screen system such as modified Ristroph screens with a fish
handling and return system, dual flow screens with smooth mesh, or rotary screens with fish
returns. Demonstrate that the technology is or will be optimized to minimize impingement
mortality of all non -fragile species;
6. Operate any combination of technologies, management practices, and operational measures
that the Director determines is BTA for reducing impingement. As appropriate to the system of
protective measures implemented, demonstrate the system of technologies has been optimized
to minimize impingement mortality of all non -fragile species; and
7. Achieve a 12-month performance standard of no more than 24 percent mortality including
latent mortality for all non -fragile species.
Compliance options 1, 2, and 4 are essentially pre -approved technologies that require minimal
additional monitoring after their installation and proper operation. Options 3, 5, and 6 require that
more detailed information be submitted to the Director before they can be specified as the BTA to
reduce impingement mortality. Options 5, 6, and 7 require demonstrations with field studies that the
technologies have been optimized to minimize impingement mortality of non -fragile species.
In addition, the Rule provides two other impingement compliance BTA options for which the Director
may consider little or no additional controls for impingement mortality (USEPA 2014a). These options
apply under very specific circumstances.
50

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
• De minimis rate of impingement — if the rates of impingement at a facility are so low that
additional impingement controls may not be justified (Section 125.94(c)(11)); and
• Low Capacity utilization of generating units — if the annual average capacity utilization rate of a
24-month contiguous period is less than 8 percent (Section 125.94(c)(12)).
The HFLCCS meets the requirements of 40 CFR §125.94(c)(1) (BTA Option #1) based on data provided in
Table 5-2. In addition, the MWIS has a design (one pump operation) and actual through -screen velocity
of <0.5 fps and therefore is compliant with the requirements of 40 CFR §125.94(c)(2) and (3) (BTA
Options 2 and 3).
By meeting the CCRS criterion (BTA #1) the existing technologies in use at the HFLCCS are BTA for
impingement mortality compliance. Furthermore, the MWIS has a design through -screen velocity that is
lower than the 0.5 fps standard for impingement mortality compliance.
51

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H.F. LEE ENERGY COMPLEX
7 Entrainment Performance Studies [§ 122.21(r)(7)]
The information required to be submitted per 40 CFR § 122.21(r)(7), Entrainment performance studies,
is as follows:
The owner or operator of an existing facility must submit any previously conducted
studies or studies obtained from other facilities addressing technology efficacy, through -
facility entrainment survival, and other entrainment studies. Any such submittals must
include a description of each study, together with underlying data, and a summary of
any conclusions or results. Any studies conducted at other locations must include an
explanation as to why the data from other locations are relevant and representative of
conditions at your facility. In the case of studies more than 10 years old, the applicant
must explain why the data are still relevant and representative of conditions at the
facility and explain how the data should be interpreted using the definition of
entrainment at 40 CFR 125.92(h).
7.1 Site -Specific Studies
HFLCCS utilizes a CCRS, therefore entrainment (and survival) is not anticipated. Hence, no site -specific
entrainment performance studies (such as studies evaluating biological efficacy of specific entrainment
reducing technologies or through -facility entrainment survival) have been conducted for the HFLCCS.
Section 4 of this report provides a discussion of fishery monitoring conducted at or near the facility.
Section 5.3 contains information regarding entrainment reductions resulting from lower cooling water
withdrawals of the HFLCCS as compared to the prior BSS.
7.2 Studies Conducted at Other Locations
As of the date of this report, no entrainment performance studies conducted at other facilities have
been determined relevant for documentation in this section.
52

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
8 Operational Status [§ 122.21(r)(8)]
The information required to be submitted per 40 CFR §122.21(r)(8), Operational status, is outlined as
follows:
(i) For power production or steam generation, descriptions of individual unit operating
status including age of each unit, capacity utilization rate (or equivalent) for the
previous 5 years, including any extended or unusual outages that significantly affect
current data for flow, impingement, entrainment, or other factors, including
identification of any operating unit with a capacity utilization rate of less than 8 percent
averaged over a 24-month block contiguous period, and any major upgrades completed
within the last 15 years, including but not limited to boiler replacement, condenser
replacement, turbine replacement, or changes to fuel type;
(ii) Descriptions of completed, approved, or scheduled uprates and Nuclear Regulatory
Commission relicensing status of each unit at nuclear facilities;
(iii) For process units at your facility that use cooling water other than for power production
or steam generation, if you intend to use reductions in flow or changes in operations to
meet the requirements of 40 CFR 125.94(c), descriptions of individual production
processes and product lines, operating status including age of each line, seasonal
operation, including any extended or unusual outages that significantly affect current
data for flow, impingement, entrainment, or other factors, any major upgrades
completed within the last 15 years, and plans or schedules for decommissioning or
replacement of process units or production processes and product lines;
(iv) For all manufacturing facilities, descriptions of current and future production schedules;
and,
(v) Descriptions of plans or schedules for any new units planned within the next 5 years.
Each of these requirements is described in the following subsections.
8.1 Description of Operating Status [§ 122.21(r)(8)(i)]
HFLCCS is normally used for baseload generation. Plant outages typically occur during the spring
(February to May) and/or in the fall/winter (October to December) months.
8.1.1 Individual Unit Age
HFLCCS began commercial operations in December 2012. According to the Duke Energy Progress 2020
Integrated Resource Plan (IRP), there is no current projected retirement date for the HFLCCS.
8.1.2 Utilization for Previous Five Years
Monthly and annual average capacity factor information for 2017-2021 is provided in Table 8-1. Annual
capacity factors during this period ranged from 58.0 to 78.4 percent. Monthly capacity factors during
this period ranged from 8.1 to 90.4 percent.
53

Table 8-1. HFLCCS Annual Capacity Factors, 2017-2021.
316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Month 2017 2018 2019 2020 2021
January 78.8 86.2 64.0 72.4 59.2
February 83.1 81.6 86.4 77.9 53.2
March 83.4 79.6 88.9 74.5 13.3
April 70.5 41.3 82.7 51.8 8.1
May 63.7 69.6 21.4 50.8 53.5
June 75.5 76.3 71.2 30.8 65.3
July 78.7 77.2 76.5 74.5 74.6
August 82.4 81.1 79.3 66.1 75.5
September 72.1 73.5 78.3 61.2 63.4
October 73.3 84.7 72.2 27.8 72.1
November 89.0 88.7 52.7 58.7 80.9
December 90.4 75.4 75.4 65.7 76.4
Annual Average 78.4
76.3 70.7
59.4 58.0
Note: Annual average may not equal monthly total average due to rounding.
8.1.3 Major Upgrades in Last Fifteen Years
As part of a modernization effort, Duke Energy retired the coal-fired generating units (1, 2, and 3) in
2012 and replaced them with a new, more efficient, natural gas -fired combined cycle facility on the
existing site. HFLCCS began commercial operations in December 2012.
8.2 Description of Consultation with Nuclear Regulatory
Commission [§122.21(r)(8)(ii)]
The HFLCCS is not a nuclear fueled unit; therefore, this subsection is not applicable.
8.3 Other Cooling Water Uses for Process Units [§122.21(r)(8)(iii)]
The HFLCCS is not a manufacturing facility; therefore, this subsection is not applicable.
8.4 Description of Current and Future Production Schedules
[§122.21(r)(8)(iv)]
The HFLCCS is not a manufacturing facility; therefore, this subsection is not applicable.
8.5 Description of Plans or Schedules for New Units Planned within
Five Years [§122.21(r)(8)(v)]
During the next five years, there are no plans to decommission, replace, or add new units at this facility
as stated in the 2020 IRP.
54

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9 References
Berry, F.H., M.T. Huish, and H. Moody. 1956. Spawning mortality of the Threadfin Shad, Dorosoma
petenense (Gunther), in Florida. Copeia 1956:192.
Bodola, A. 1966. Life History of the Gizzard Shad, Dorsoma cepdianum (Lesuer), in western Lake Erie.
U.S. Fish and Wildlife Service Fisheries Bulletin 65:391-425.
Burns, J. W. 1966. Threadfin Shad. Pages 481 - 487 in Calhoun (1966).
Calhoun, A., editor. 1966. Inland fisheries management. California Department of Fish and Game,
Sacramento CA. Adams, J.C., and R.V. Kilambi. 1979. Maturation and Fecundity of Redear
Sunfish. Arkansas Acad. Sci. Proc. 33:13-16.
Carlander, K.D. 1977. Handbook of Freshwater Fishery Biology. Vol. 2. The Iowa State University Press,
Ames IA. 431 pp.
Coggeshall, L. T. 1924. A study of the productivity and breading habits of the Bluegill, Lepomis pallidus
(Mitch.). Proceedings of Indiana Academy of Science 33:315-320.
Crowe, W. R. 1959. The Bluegill in Michigan. Michigan Department of Conservation Fish Division
Pamphlet 31.
Ehrlich, K. F. 1974. Chemical changes during growth and starvation of herring larvae. Pages 301-323 in J.
H. S. Blaxter, editor. The early life history of fish. Springer-Verlag, New York.
Estes, C. M. 1949. The fecundity of the Bluegill (Lepomis macrochirus) in certain small Texas reservoirs.
Master's Thesis. North Texas State College, Denton. (Not seen; cited in Carlander 1977).
Gebhart, Glen E., and Robert C. Summerfelt. 1978. Seasonal Growth of Fishes in Relation to Conditions
of Lake Stratification. Oklahoma Cooperative Fishery Research Unit 58 (1978): 6-10. Oklahoma
State University, Stillwater OK.
Gerdes, J.H. 1961. The role of the Threadfin Shad, Dorosoma petenense, in the food web of a small
impoundment. Master's thesis. University of Arizona, Tucson AZ. (Not seen; cited in Jones et al
1978).
Graham, J.H., and R.W. Hastings. 1984. Distributional patterns of sunfishes on the New Jersey Coastal
Plain. Environmental Biology of Fishes 10:137-148.
Griffith, G.E., J.M. Omemik, J.A. Comstock, M.P. Schafale, W.H. McNab, D.R. Lenat, D.R. and T.F.
MacPherson. 2002. Ecoregions of North Carolina. U.S. Environmental Protection Agency,
Corvallis OR. (map scale 1:1,500,000).
Gross, M. R., and A. M. MacMillian. 1981. Predation and the evolution of colonial nesting in Bluegill
sunfish (Lepomis macrochirus). Behavioral Ecology and Sociobiology 8:167-174.
Gunter, G.S. 1938. Seasonal variation in abundance of certain estuarine and marine fishes with
particular reference to life histories. Ecological Monographs 8:313-346.
55

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Jenkins, R.E., and N.M. Burkhead. 1993. Freshwater Fishes of Virginia. American Fisheries Society,
Bethesda MD.
Johnson, J.E. 1971. Maturity and fecundity of Threadfin Shad, Dorosoma petenense (Gunther), in central
Arizona reservoirs. Transactions of the American Fisheries Society 100:74-85.
Jones, P.W., F.D. Martin, and J.D. Hardy. 1978. Development of fishes of the Mid -Atlantic Bight. An atlas
of egg, larval and juvenile stages, Volume 1. U.S. Fish and Wildlife Service Biological Services
Program FWS-OBS-78/12.
Lambou, V.W. 1965. Observation on size distribution and spawning behavior of Threadfin Shad.
Transactions of the American Fisheries Society 94:385-386.
Loar, J.M., J.S. Griffith, and K.D. Kumar. 1978. An analysis of factors influencing the impingement of
threadfin shad at power plants in the southeastern United States. Pages 245-255 in L.D. Jensen,
editor. Fourth national workshop on entrainment and impingement. EA Communications,
Melville NY.
May, R. C. 1974. Larval mortality in marine fishes and the critical period concept. Pages 3-19 in J. H.S.
Blaxter, editor. The early life history of fish. Springer-Verlag, New York.
Menhinick, E.F. 1991. The Freshwater Fishes of North Carolina. North Carolina Wildlife Resources
Commission, Raleigh NC.
Miller, R.R. 1960. Systematic and biology of the Gizzard Shad (Dorosoma cepedianum) and related
Fishes. U.S. Fish and Wildlife Service Fishery Bulletin 60(173):370-392.
Miller, R.R. 1964. Genus Dorosoma Rafinesque 1820. Gizzard Shads, Threadfin Shads. Pages 443-451 in
Fishes of the western North Atlantic Part 3. Sears Foundation for Marine Research. Yale
University, New Haven CT.
Miller, T.J., Crowder, L.B., Rice, J.A., Marshall, E.A. 1988. Larval size and recruitment mechanisms in
fishes: toward a conceptual framework. Canadian Journal of Fisheries and Aquatic Sciences
45:1657-1670 p.
National Oceanic and Atmospheric Administration [NOAA]. 2021. Endangered Species Directory.
Accessed August 3, 2021. https://www.fisheries.noaa.gov/species-directory/threatened-
endangered.
North Carolina Department of Environmental Quality (NCDEQ) 2018. Neuse River Basin Restoration
Priorities 2010 Amended August 2018. Accessed May 2021.
https://files.nc.gov/ncdeq/Mitigation%20Services/Watershed Planning/Neuse River Basin/RB
RP-Neuse-201807-.pdf.
NCDEQ 2021. Division of Water Resources Water Classification map. Accessed May 17, 2021.
https://ncdenr.maps.arcgis.com/apps/webappviewer/index.html.
North Carolina Department of Environment and Natural Resources [NCDENR]. 2009. Division of Water
Quality. Neuse River Basinwide Water Quality Plan. July 2009.
56

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
North Carolina Department of Natural and Cultural Resources [NCDNCR]. 2021. North Carolina Natural
Heritage Data Explorer element occurrence data. NCDNCR, Raleigh NC.
Pflieger, W. L. 1975. The fishes of Missouri. Missouri Department of Conservation, Columbia MO.
Rawson, R.R. 1964. Spawning of Threadfin Shad, Dorosoma petenense, at low temperatures. California
Fish and Game 50:58.
Reynolds, J. B. and A. L. Kolz. 2012. Electrofishing. Pages 305-362 in A. V. Zale, D. L. Parrish, and T. M.
Sutton, editors. Fisheries techniques, 3rd edition. American Fisheries Society, Bethesda MD.
Ricks, B. R., C. Buckley, and T. D. VanMiddlesworth. 2021. Neuse River Striped Bass monitoring
programs, 2018-2019. North Carolina Wildlife Resources Commission, Federal Aid in Sport Fish
Restoration, Project F-108, Final Report, Raleigh NC.
Ricks, B.R. and T.D. VanMiddlesworth. 2020. Neuse River American Shad survey 2019- 2020. North
Carolina Wildlife Resources Commission, Federal Aid in Sport Fish Restoration, survey summary,
Raleigh NC.
Rohde, F.C., Rudolf, G.A., Foltz, J.W., and J.M. Quattro. 2009. Freshwater Fishes of South Carolina.
University of South Carolina Press, Columbia SC.
Schneider, R.W. 1969. Some aspects of the life history of the Gizzard Shad, Dorsoma cepdianum in Smith
Mountain Lake, Virginia. Master's thesis. Virginia Polytechnic Institute and State University,
Blacksburg VA.
Shelton, W.L. and B. G. Grinstead. 1973. Hybridization between Dorsoma cepedianum and D. petenense
in Lake Texoma, Oklahoma. Proceedings of the Annual Conference Southeastern Association of
Game and Fish Commissioners 26(1972):506-510.
United States Environmental Protection Agency (USEPA). 2014. National Pollutant Discharge Elimination
System - Final Regulations to Establish Requirements for Cooling Water Intake Structures at
Existing Facilities and Amend Requirement at Phase I Facilities; Final Rule. 40 CFR Parts 122 and
125. Federal Register Vol. 79 No. 158. August 15, 2014.
United States Fish and Wildlife Service (USFWS). Information for Planning and Consultation (IPaC),
Environmental Conservation Online System. Accessed August 3, 2021.
https://ecos.fws.gov/ipac/.
United States Geological Survey (USGS). 2021. Nonindigenous Aquatic Species (NAS). Accessed August 3,
2021. https://ecos.fws.gov/ipac/.
Wang, J.C.S and R.J. Kernehan. 1979. Fishes of the Delaware Estuaries. A Guide to the Early Life
Histories, Towson, MD. pp. 410. ISSN 0-931842-02-6.
57

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Appendices

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Appendix A. H.F. Lee Combined Cycle Station
§122.21(r)(2) — (8) Submittal Requirement Checklist.
Intake Structure Data
(4) Source Water Baseline Biological Characterization Data
(2)(i) Narrative description and scaled drawings of source
waterbody.
Yes
(2)(ii) Identification and characterization of the source
waterbody's hydrological and geomorphological
features, as well as the methods used to conduct any
physical studies to determine intake's area of
influence within the waterbody and the results of
such studies.
(2)(iii) Locational maps.
(3)(i)
Narrative description of the configuration of each
CWIS and where it is located in the waterbody and in
the water column.
Latitude and Longitude of CWIS.
Narrative description of the operation of each CWIS.
Flow distribution and water balance diagram.
Engineering drawing of CWIS.
(4)(i) A list of the data supplied in paragraphs (r)(4)(ii)
through (vi) of this section that are not available, and
efforts made to identify sources of the data.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes, but not
applicable
because all data
is available.
(4)(ii) A list of species (or relevant taxa) for all life stages and
their relative abundance in the vicinity of CWIS.
(4)(iii) Identification of the species and life stages that would
be most susceptible to impingement and entrainment.
Yes
Yes
(4)(iv) Identification and evaluation of the primary period of
reproduction, larval recruitment, and period of peak
abundance for relevant taxa.
(4)(v) Data representative of the seasonal and daily
activities of biological organisms in the vicinity of
CWIS.
Yes
Yes
(4)(vi) Identification of all threatened, endangered, and
other protected species that might be susceptible to
impingement and entrainment at cooling water intake
structures.
(4)(vii) Documentation of any public participation or
consultation with Federal or State agencies
undertaken in development of the plan.
Yes
Yes, but not
applicable.
A-1

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
(5) Cooling Water System Data
(4)(viii) Methods and QA procedures for any field efforts.
Yes, but not
applicable as no
new data have
been collected.
(4)(ix) In the case of the owner or operator of an existing
facility or new unit at an existing facility, the Source
Water Baseline Biological Characterization Data is the
information included in (i) through (xii).
(4)(x) Identification of protective measures and stabilization
activities that have been implemented, and a
description of how these measures and activities
affected the baseline water condition in the vicinity of
CWIS.
Yes, noted in
report that (i)
through (xii)
provide this
information.
Yes
(4)(xi) List of fragile species as defined at 40 CFR 125.92(m)
at the facility.
Yes
(4)(xii) Information submitted to obtain Incidental take
exemption or authorization for its cooling water
intake structure(s) from the U.S. Fish and Wildlife
Service or the National Marine Fisheries Service.
(5)(i)
Narrative description of the operation of the cooling
water system and its relationship to CWIS.
(5)(i)
Number of days of the year the cooling water system
is in operation and seasonal changes in the operation
of the system.
(5)(i)
Proportion of the design intake flow that is used in the
system.
Yes, but not
applicable.
Yes
Yes
Yes
(5)(i) Proportion of design intake flow for contact cooling,
non -contact cooling, and process uses.
Yes
(5)(i)
Distribution of water reuse to include cooling water
reused as process water, process water reused for
cooling, and the use of gray water for cooling.
not applicable
(5)(i) Description of reductions in total water withdrawals
including cooling water intake flow reductions already
achieved through minimized process water
withdrawals.
(5)(i) Description of any cooling water that is used in a
manufacturing process either before or after it is used
for cooling, including other recycled process water
flows.
Yes
not applicable
(5)(i) Proportion of the source waterbody withdrawn (on a Yes
monthly basis).
A-2

(5)(ii)
316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Design and engineering calculations prepared by a
qualified professional and supporting data to support
the description required by paragraph (r)(5)(i) of this
section.
Yes
(5)(iii) Description of existing impingement and entrainment
technologies or operational measures and a summary
of their performance.
Yes
Identification of the chosen compliance method for the entire Yes
CWIS or each CWIS at its facility.
(6)(i) Impingement Technology Performance Optimization No, not selected
Study for Modified Travelling Screen. compliance path
s Two years of biological data collection. and thus not
3 applicable.
c -0
ca c
a
E`^
o ,?
U
c ° Demonstration of Operation that has been optimized
8 to minimize impingement mortality.
o
c Complete description of the modified traveling
-. a, screens and associated equipment.
2 w°'o (6)(ii) Impingement Technology Performance Optimization
c • c
Q Study for Systems of Technologies as BTA for
s o E Impingement Mortality.
U
Minimum of two years of biological data measuring
the reduction in impingement mortality achieved by
the system.
(7) Entrainment Performance
0
al
la
3
V▪ )
- _ VI
L :a =
ac aJ
pin
(7)(i)
Site -specific studies addressing technology efficacy,
through plant entrainment survival, and other
impingement and entrainment mortality studies.
(7)(ii) Studies conducted at other locations including an
explanation of how they relevant and representative.
Yes, note that no
site -specific
studies were
conducted at this
facility.
Yes, note that
studies at other
locations were
not determined
to be relevant.
(7)(iii) Studies older than 10 years must include an
explanation of why the data are still relevant and
representative.
not applicable
(8)(i) Description of individual unit age, utilization for
previous 5 year, major upgrades in last 15 years.
Yes
A-3

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
(8)(ii) Descriptions of completed, approved, or scheduled Yes, but not
uprates and Nuclear Regulatory Commission applicable.
relicensing status of each unit at nuclear facilities.
(8)(iii) Other cooling water uses and plans or schedules for
decommissioning or replacing units.
Yes, but not
applicable.
(8)(iv) For all manufacturing facilities, descriptions of current Yes, but not
and future production schedules. applicable.
(8)(v) Descriptions of plans or schedules for any new units Yes
planned within the next 5 years.

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Appendix B. Engineering Drawings of Cooling Water
Intake Structure
• Drawing G-105107: Circulating Water System Modification River Structure
Details
• Drawing G-105109: Circulating Water System Modification Make Up Water
Area FDN Details
B-1

2 3
4
5
6
7
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12
14
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EL.B9.0' - PLACING DIMENSIONS ARE GIVEN TO CENTER OF EARS
UNLESS NOTED.
ALL SPLICES IIIREINFORCEMENT SI-ALI:Cl/PPLY WITH
•
. - THE REQU I REPENTS OF CURRENT AC STANIAROS,
S ECTION BCS, eUT IN NO CASE MALL LAP BE LESS
•THAN 2L AP DIAUETERS_
1 a1I='5s-a,s. BALL BARSS SHALL HAVE 2" 111111S/I CONCRETE COVER
'UNLESS THED/15, WITT
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H.FLEE SEP
CIRCULATING WATER SYSTEM MODIFICATION
RIVER STRUCTURE DETAILS' M.5 R.
EBASCO SERVICES IncORPORATE6 NEW TORN
CAR 1623
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19 -7IB
4.7
316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
B-2

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APPROVED ALTELNATE 4 EEOG
NOTES
CONSTRUCTION, WHERE NOT SPECIFICALLY COVERED DT
- EBASCO SPECIFICATIONS, SHALL MEET. THE. STANDARDS
OF ACI 31E-7I.ANO ACI 301-22. IN"TNE EVERT 'OF
• CONFLICT EETWEEN THESE ACI STANDARDS ACI 32L-72
.SHALL GOVERN. -•
CONCRETE SMALL BE CLASS (90P )I
E SPBe1F1CAT10
ELECTARec4L CONKUITSRAND d.WOO. PARTSEONALL
OF IN POSITION BEFORE COWNELE IS PEACEO.
FOR SPECIF1 CATIONS FOR STEEL FOR CONCRETE REINFORC —
1HO EARS AND FOR BAR DETAILS SEE BAR BENDING
SCHEDULE CAR 1635,-8105101-4 -
PLACING. DIMENSIONS ARE MEN TO CENTER OF BARS
UNLESS NOTED.
ALE SPLICES IN REINFDRCENENT SHALL CCMPLT WITH THE
REQUIRFNENTS OF CURRENT ACI STANDARDS, SECTION 805
BUT IN NO CASE SHALL LAP BE LESS THAN 11 EAR
DIAMETERS.
A
C
ALL BARS SHALL HAVE 2" MINIMUM CONCRETE COVER
UNLESS OTHERWISE NOTED.
SHIFT OR BEND BARS TO CLEAR ANCHOR BOLTS. DRAINS.
PIPE SLEEVES AND ENBEDDEO PARTS.
WITH ANCHOR BOLTS EA05L0x TEITHOEEAMT 0AOF2ASGRADE 0R
036 ST UCTURAL STEEL 8110 00200250 HE5AGVNAL NUTS
AND HASHER UNLESS OTHERWISE NOTED, EXTERNAL AND
INTERNAL THREADS SHALL BE UNC-SA.
ANCHOR PLATES SHALL BE STRUCTURAL STEEL IN A000RD-
ANCE WITH ASTR A] ANB AEG.
•;SLEEVES SHALL. BE EITHER 28 SAGE SHEET NETAL SLEEIYES
STA711011 PIPE SLEEVES. RUBBER DR PVC SLEEVES UNLESS
OTNERNISE NOTED.
ALL WELD INS SHALL BE IN ACCORDANCE WITH AVERT LAN
WELDING SOCIETY CORE 01.0 .STANDARD OBOE FOR ARC
AND GAS SHALL
WELDING IN BUILDING CONSTRUCTI Ox" ROOT
PASSESELECTROSHALL DE MALE WITH A 3/32'A DR IMUM
ELECTRSSE, ALLWELDSSHALL HAVE A MINIMUM OF
BEFORE
PASSES. WELLING PROCEDURE SHALL BE APPROVED.
BEFORE WORK IS PERFORMED.
REFERE QCE ! DRAW BJG15
eAE BE11R1L1G SCHEDULE 31105101-4
SYSTEM CAMAL DISCN-MA3 9-164WeE K
C.W. SYSTEM &-101192
M_U WAT22 PUµ17TA- 9N17,621,642T4(ELEC) 6-IO2 104
CLEF STSTEH AUTOMATIC STRAINER 1 1623-L-CN-2
C W HEAT E%C41. 00051ET. PUHD '11623-L•LW-4
SERVICE WATER MAKE-UP PDHPS AA6', 1623 •L-Avl-S
MAKE -LP P2MP STA 1KANSP (WEST) I 1623.115.4,5
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316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
B-3

Appendix C. Engineering Calculations for Through -
Screen Velocity
c-1

HF Lee Combined Cycle Station
316(b) Report
Through -Screen Velocity Calculations - Data Sheet
Mike Smallwood (rev 2022-0621)
DRAWING G-105109, Section D-D
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Bar Rack Data
Screen Open Area = 70.28%
Total Open Area = 56.2211 ft2
Total Intake Window Area = 80.0 ft2
Bar Size = 1" placed 4" on center
Intake Window Width=10.0ft
Intake Window Height = 8.0 ft
Assume 2" frame around bar rack
Pump Data
Design Flow/Pump = 12,150 gpm
316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
DRAWING G=105109
PLAN
UP WATER PUMP SUPPORT
AT UKT VVIT I.C.3 OKeN 3TRVCTUR J -
Design Intake Flow = 24,300 gpm (assumes two pumps running)
Actual Intake Flow (2017-2021) = 3,132 gpm (4.51 MGD)
C-2

Bar Rack Data
Total Intake Window Area=80.0ft2
Open Area = 70.28%
Effective Intake Window Area = 56.2 ft2
316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
Pump Data
Design Flow/Pump=12,150gpm
Theoretical Maximum Intake Flow = 24,300gpm (assumes two pumps running)
Actual Intake Flow (2017-2021) =3,132 gpm (4.51 MGD)
Assumptions
1. intake bay river elevation is not considered in calculations
2. bar rack is clean
13. river elevation is same or higher than top of intake window (see "Data Sheet" page)
[note at low design water elevation (57.0ft), the TBV for one pump operation would be 0.49fps]
Formula
1: TBV = Q/ (448.8 * EOA)
where: TBV =through bar velocity, fps
Q = pump flow, gpm
EOA =equivalent open area, ft2
Solve for TBV Using Formula 1(one pump operation)
TBV = 12150 gpm /(448.8 * 56.2 ft2)
TBV = 0.48 fps
Solve for TBV Using Formula 1(AIF flow)
TBV = 3132 gpm /(448.8 * 56.2 ft2)
TBV = 0.12 fps
Solve for TBV Using Formula 1(two pump operation)
TBV = 24300 gpm /(448.8 * 56.2 ft2)
TBV = 0.96 fps
conversion factors
1 cfs =448.8 gpm

316(b) Compliance Submittal
H.F. LEE ENERGY COMPLEX
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C-4