Bryan McCabe, PE PCU/PSW Tyler Highfill, PE Highfill ...
Transcript of Bryan McCabe, PE PCU/PSW Tyler Highfill, PE Highfill ...
Pender County UtilitiesBryan McCabe, PE PCU/PSW
Tyler Highfill, PE Highfill Infrastructure
Reed Barton, PE CDM Smith
ANNUAL BOARD RETREAT
JAN 31, 2018 & FEB 1, 2018
Pender County UtilitiesAGENDA ITEM 1
WATER DISTRIBUTION HISTORY AND CONSTRUCTION
Water and Sewer District Creation
Regulated by NCGS 162A
Public Hearing
BOCC Resolution Creation of District
BOCC Resolution Organization of District
Certified Copies of Resolution
Affidavits Public Notice of Resolutions
District is a Municipal Corporation
Governed by BOCC
Authorizes Certain Powers
Water and Sewer District GO Bonds
Regulated by NCGS 159 (Local Government Finance Act)
15 steps outlined for the process by Bond Counsel
Took approximately 9 months to complete
Required many resolutions, and public hearings
Bonds for Rocky Point Issued 1996
Bonds for SHWSD, CPWSD, MCWSD, and PC WTP approved by
voters 2006
Bonds for CUWSD failed twice, 2006 and 2008.
Future projects will likely require Revenue Bonds
Note: PCU Anticipates Funding Agency Approval March 2018. July Deadline with
Chinquapin must be extended to provide time to complete project.
Maple Hill Agreement for Water
Service with Chinquapin
1988
1992
Maple Hill Water
System Built
USDA Funded
Maple Hill Water &
Sewer District Formed
2006
2012
MHWSD Builds Wastewater Collection,
Treatment, and Disposal
(100% Grant)
MHWSD Notified
Chinquapin Water
Source will terminate
July 2018
2017
MHWSD Submitted Funding
Application to SRF
$685,000 Project
Preliminary Water Supply Agreement
with ONWASA
2018
Pender County Utilities History - MHWSD
Rocky Point/ Topsail
Water and Sewer District Formed
1996
2001 – 2010
RPTWSD Built in 5 Phases
Scotts Hill, Central Pender, Moore’s Creek,
Columbia-Union, (and Maple Hill) Water and
Sewer Districts Formed
2006
2006
GO Bond Passes for SHWSD, CPWSD, MCWSD,
and WTP.
GO Bond Fails in
CUWSD
2006 & 2008
2011
SHWSD Built
PCU WTP Comes On-
Line
New Agreement
with Wallace
2012.
2016-2018
CPWSD and MCWSD
Built
Pender County Utilities History - Distribution RPTWSD, SHWSD,WTP, CPWSD, MCWSD
Pender County UtilitiesAGENDA ITEM 2
WATER SOURCE – WTP OVERVIEW AND SUPPLY HISTORY
Pender
County WTP
• Conventional Water Treatment Process
• Coagulation
• Flocculation
• Sedimentation
• Filtration
• Disinfection
• Advanced Treatment Capabilities
• Granular Activated Carbon
• Taste and Odor Control
• DBP Formation Prevention
• Emerging Contaminants
Pender County Water Demands
Pender County Utility WTP
Pender County Water Treatment Plant constructed to treat 2 MGD
Staff operates plant approximately 10 hr/day to treat 1.2 MGD
2.88 MGD in 24 hours.
Additional supply will require additional run time = additional staff
WTP is readily expandable to 6 MGD with minimal upgrades
Expansion beyond 6 MGD will require construction of New WTP
Raw Water Purchase Agreement from LCWASA = 6 MGD
Purchased 2006 for around $1,000,000 (10 year payment plan)
Waste Rate approximately 10%, 5.4 MGD available to distribution
Wallace Water Purchase
Agreement 200,000 GPD
1999
2001
Wallace Amend #1
500,000 GPD
Wallace Amend #2
800,000 GPD
2005
2006
LCFWASA Raw Water Agreement
6 MGD
Wallace Amend #3 1.2 MGD
2007
2010
Surf City Agreement
100,000 GPD
2 MGD WTP
Comes On Line
2012
2012
New Agreement
with Wallace 375,000 GPD
(Minimum)
Pender County Utilities – Supply
Pender County UtilitiesAGENDA ITEM 3
CAPITAL PROJECTS FOR WATER SYSTEM
Pender County UtilitiesAGENDA ITEM 3A
TIMELINE FOR CAPITAL PROJECTS
TYLER HIGHFILL, PE HIGHFILL INFRASTRUCTURE
Activity Trigger
IBT Certificate on-going
Water System Master
PlanASAP
Hwy 210 Water System
ExpansionASAP
WTP Expansion to
4 MGD
Start: Max
Month = 1.6
MGD
WTP Expansion to
6 MGD
Start: Max
Month = 3.2
MGD
Alternative Water
Supplies - Detailed Study
Start: earlier of
Max Month = 4.3
MGD or 2026
Expand WTP to >6 MGD
or Build on New Source
Finish: by Max
Month = 5.4
MGD
Decision to Purchase
Raw Water Capacity
from Brunswick Co.
By start of WTP
to >6 MGD;
Latest: 2028 +/-
2027 20282018 2019 2020 2021 2022 2023 2024 2025 2026
Key Projects Timeline
DEMAND DRIVEN SCHEDULE
Pender County UtilitiesAGENDA ITEM 3B
DEMAND PROJECTIONS
TYLER HIGHFILL, PE HIGHFILL INFRASTRUCTURE
Water Demand Terminology
Average Day Demand
Total annual water demand divided by 365 days in a year
Used as basis for historical use and future projections
Maximum Month Demand
Highest calendar month demand
Typically July is the Max Month for PCU
June 2nd highest; August 3rd highest
Often expressed as a daily rate (i.e. million gallons per day or MGD)
Maximum Day Demand
Highest daily use in a given year
Size treatment and conveyance systems to MDD
Peak Hour Demand
Highest hour of demand
Rely on storage tanks to meet peak hour demand
Historical Water Demand
Ref: Exhibit 2-2 from EA for the IBT (HIGHFILL & Ch2M, Jan 2017)
Comparison of Demand Forecasts
Comparison of Demand Forecasts
Probabilistic Water Demand Forecast Started with a deterministic projection methodology
Set of assumptions based on unit flow rates, land use plans, historical patterns, etc.
Applied a deterministic forecast model
Probabilistic variables applied to assumptions to capture range of values
Monte Carlo Simulation to determine magnitude and likelihood of demand forecast of the following variables:
Unit consumption
Percent connections
Growth rate
Persons per household
Stakeholder water supply
Non-revenue water
MM:AD peaking factor
Average Daily Finished Water Demand Forecast
Baseline Annual Average Day Finished Water Demand
Includes IBT co-applicants
New Moore’s Creek & Central WSD water lines in service
In addition to PCU’s service area growth,Co-applicant demand starts phasing in
Columbia-Union WSD water lines in service
Surface WTP came online
Ref: Exhibit 15 from EA for the IBT (HIGHFILL & Ch2M, Jan 2017)
Maximum Month Finished Water Demand Forecast
Maximum Month Average Day Finished Water Demand
Includes IBT co-applicants
Ref: Exhibit 16 from EA for the IBT (HIGHFILL & Ch2M, Jan 2017)
15 MGD in 2045 (~25 yr horizon)
Demand Forecast for IBT – including co-applicants
Ref: Exhibit 23 from EA for the IBT (HIGHFILL & Ch2M, Jan 2017)
14.5 MGD in 2045
Overall demand adjusted with water balance for IBT
Maximum Month Average Day Finished Water Demands
Includes IBT co-applicants
Demand Forecast for IBT – PCU Only
Ref: Exhibits 24 from EA for the IBT (HIGHFILL & Ch2M, Jan 2017)
PCU only demand adjusted with water balance for IBT
Maximum Month Average Day Finished Water Demands
11 MGD in 2045
Pender County UtilitiesAGENDA ITEM 3B
WATER SOURCE ALTERNATIVES
REED BARTON, PE CDM SMITH
Kings Bluff Pump Station
Raw Water Pipeline
(Future) Additional Raw Water Pipeline
Cape Fear River
Supply, Treatment, and Regulatory Limitations:
• Allowable withdraw from the Cape Fear River (Safe Yield)• Permit to transfer water out of Cape Fear Basin (IBT)• Infrastructure to pump raw water to the WTP• Water Treatment Capacity • Infrastructure to pump/convey drinking water to customers
When will water demand go beyond PCU’s current Treatment Facility Capacity?
Demand will exceed 6-mgd in approximately 10-years (2028)
Need more than 6-mgd Begin
Construction on Expansion
MMAD Finished Water Demand (includes IBT co-applicants)
What is the Near-Term and Long-Term Plan for Water Supply?
Near-Term: 1.5-mgd to 6-mgd
Water Supply Source: Cape Fear River
Currently, WTP can treat/pump up to 2-mgd
WTP is readily expandable to 6-mgd
No Additional Raw Water infrastructure needed
No major basins/filters, SCADA, electrical
Need additional process equipment, pumps, etc.
Transmission expansions to accommodate 6-mgd
210 Transmission Pipe, and others
What is the Near-Term and Long-Term Plan for Water Supply?
Long-Term: > 6-mgd
How will PCU expand the water system beyond 6-mgd?
Water Supply Source: TBD
Transmission/Distribution: TBD
Possible Water Source Alternatives
Cape Fear River
Purchase additional raw water capacity (pipe/pumps) from LCFWSA // Brunswick County
Expand current WTP to limit of IBT (25+ years)
NE Cape Fear River
Surface water / brackish
Need to evaluate permitting requirements
Need to evaluate water quality and treatment requirements
Groundwater
Need to evaluate feasibility and costs
Freshwater Aquifers vs. Brackish Aquifers
Objectives of Water Supply Master Plan
Updated Growth and Demand Projections
Develop Plan for meeting growth/demand with water supply/distribution
Evaluate and define the near-term water infrastructure investment needs
10-year Capital Improvement Projects plan to support growth from 1.5- to 6-mgd (project definitions, cost estimates)
Evaluate staffing and operational needs
Determine optimal phasing of system expansion
Define triggers: flowrate demand, water age/quality, pressure
Evaluate and define the long-term water infrastructure needs
Long Range Water Supply Planning (Evaluate Source Alternatives)
Comparison of 1 Treatment Facility vs. 2 Treatment Facilities (Cost of Distribution System and Treatment)
Major Capital Projects to support growth beyond 6-mgd
Identify opportunities to reduce risk and increase resiliency
Emergency planning (interconnections)
Source and Transmission Redundancy
Activity Trigger
IBT Certificate on-going
Water System Master
PlanASAP
Hwy 210 Water System
ExpansionASAP
WTP Expansion to
4 MGD
Start: Max
Month = 1.6
MGD
WTP Expansion to
6 MGD
Start: Max
Month = 3.2
MGD
Alternative Water
Supplies - Detailed Study
Start: earlier of
Max Month = 4.3
MGD or 2026
Expand WTP to >6 MGD
or Build on New Source
Finish: by Max
Month = 5.4
MGD
Decision to Purchase
Raw Water Capacity
from Brunswick Co.
By start of WTP
to >6 MGD;
Latest: 2028 +/-
2027 20282018 2019 2020 2021 2022 2023 2024 2025 2026
Key Projects Timeline
DEMAND DRIVEN SCHEDULE
Pender County UtilitiesAGENDA ITEM 3B
NC 210 TRANSMISSION LINE
TYLER HIGHFILL, PE HIGHFILL INFRASTRUCTURE
Highway 210 Water System Improvements Current capacity:
Maximum: 650 GPM = 0.9 MGD
Firm: 450 GPM = 0.6 MGD
Significant concerns about available capacity, but need IBT certificate to expand
Path forward
Co-applicant commitment
Preliminary Engineering Report to determine:
Planning design horizon (commonly 20 years)
Demand projections (50th percentile, 75th percentile, or other)
Alternatives review
Prepare cost opinion
Funding
Average Day Demand Forecast w/Co-apps(from EA for IBT, Jan 2017)
Hwy 210 Water System Improvements
• Waterline: 16” to 20”
• Maybe larger if co-applicants participate
• Booster PS expansion
• Maybe two booster PSs if co-applicants participate
• Project cost:
• $17M - $25M depending demand goals.
Activity
Co-application participation
interest/commitment
Preliminary Engineering
ReportFunding
Design
Permitting
Bid/Award
Construction
1Q 2Q 3Q 4Q3Q 4Q 1Q 2Q 3Q 4Q
2018 2019 2020 2021
1Q 2Q 3Q 4Q 1Q 2Q
Highway 210 Water System Improvements –Preliminary Timeline
IBT Certificate expected
Pender County UtilitiesAGENDA ITEM 4A
RECAP TIMELINE FROM WEDNESDAY
TYLER HIGHFILL, PE HIGHFILL INFRASTRUCTURE
Activity Trigger
IBT Certificate on-going
Water System Master
PlanASAP
Hwy 210 Water System
ExpansionASAP
WTP Expansion to
4 MGD
Start: Max
Month = 1.6
MGD
WTP Expansion to
6 MGD
Start: Max
Month = 3.2
MGD
Alternative Water
Supplies - Detailed Study
Start: earlier of
Max Month = 4.3
MGD or 2026
Expand WTP to >6 MGD
or Build on New Source
Finish: by Max
Month = 5.4
MGD
Decision to Purchase
Raw Water Capacity
from Brunswick Co.
By start of WTP
to >6 MGD;
Latest: 2028 +/-
2027 20282018 2019 2020 2021 2022 2023 2024 2025 2026
Key Projects Timeline
DEMAND DRIVEN SCHEDULE
Pender County UtilitiesAGENDA ITEM 4B
IBT STATUS
TYLER HIGHFILL, PE HIGHFILL INFRASTRUCTURE
Interbasin transfer (IBT) defined:
The withdrawal of surface water from one river basin and discharge of all or any part of the water in a river basin different from the origin.
Transfer = Withdrawal – Return
Net Transfer, Not Gross
IBT Law…
Based on General Statute requirements dating back to 1988.
Significant amendments in 1993, 1998, and 2007; other amendments in 2010, 2013, and 2014.
Threshold: A transfer above 2 MGD requires an IBT certificate.
Statute defines IBT river basins (and sub-basins).
Statute prohibits reselling water to any public water system not listed on the certificate as a co-applicant.
IBT Certification Process § 143-215.22L(w)Requirements for Coastal Counties and USACE Reservoirs
II. Applicant submits draft environmental document (EA) pursuant to State
Environmental Policy Act (SEPA)
I. Applicant submits Notice of Intent to file a petition
NCDEQ issues finding
of no significant impact
(FONSI)
III. Applicant submits petition to EMC
Public notice
of petition
and 30-day
notice of
hearing
Public hearing on
the petition
Comments
accepted for
30 days after
hearing
NCDEQ
prepares
written
response to
comments
EMC issues final determination
IBT Certification Process Path Forward
September 13, 2018 Determination by EMC
March 22, 2018 Public Hearing for Petition (rescheduled from Jan 18th due to weather)
November 2017 Petition submitted for Public Comment
May 2017 EA and FONSI submitted to State Clearinghouse
September 2016 Draft EA submitted to DWR
May 2016 Preparation of EA and use of Cape Fear/Neuse River Hydrologic Model
April/May 2016 NOI Submitted by PCU; Local Water Supply Plan Updates
Pender County UtilitiesAGENDA ITEM 4C
LCFWASA AGREEMENT
BRYAN MCCABE, PE
CHAD MCEWEN
LCFWASA – PROPOSED PIPLINE AND CAPACITY
PROPOSED 54” PARALLEL RAW WATER LINE (POSSIBLY 60”)
PARTNERSHIP BETWEEN LCFWASA, BRUNSWICK, CFPUA, PENDER
54” ESTIMATED CONSTRUCTION COST = $59.8 MILLION
PARTNERS WORKING TOWARDS AGREEMENT TO PROCEED WITH
FINAL DESIGN AND MOVE INTO CONSTRUCTION
%CAPACITY = %PARTICIPATION (COST)
PENDER WOULD HAVE UNTIL APPROXIMATELY 2028 TO COMMITT
ADDITIONAL 5 MDG FROM LCFWASA THROUGH THE PARALLEL
PIPE (12.2% +/- $8.3 MILLION)
LCFWASA – PROPOSED PIPLINE AND CAPACITY
STEPS NECESSARY TO UTILIZE ADDITIONAL CAPACITY
IBT PETITION IS SUCCESSFUL
PURCHASE RAW WATER CAPACITY FROM LCFWASA
UPGRADE WTP (EXISTING FOOTPRINT MAX CAPACITY = 6MGD)
UPGRADE DISTRIBUTION FROM WTP TO US 17
2006 WATER MASTER PLAN IDENTIFIED A 42” PIPELINE ALONG US 421
EXISTING IS 24”
NC 210 PIPELINE – ADDITIONAL UPGRADE
Pender County UtilitiesAGENDA ITEM 4D
INFILL PROJECTS - RPTWSD
BRYAN MCCABE, PE
RPTWSD – INFILL PROJECT
EXISTING SIGN-UPS FOR ORIGINAL SYSTEM
REQUESTS FOR SERVICE EXTENSIONS
PREVIOUSLY EVALUATED APPROXIMATELY 5 DOZEN ROADWAYS
ESTIMATE $4 MILLION
USDA LOAN – ESTIMATED ANNUAL DEBT SERVICE $200,000
MINIMUM CONNECTIONS REQUIRED
WILL HONOR ORIGINAL SIGN-UPS FOR $120
FEASIBILITY AND PRIORITIZATION BASED ON RETURN
CAPACITY FEES FOR ADDITIONAL CONNECTIONS
Pender County UtilitiesAGENDA ITEM 4E
EXPANSION IN MCWSD AND CPWSD
TYLER HIGHFILL, PE HIGHFILL INFRASTRUCTURE
Defining the 2014 Project
Basis for referendum (master plan)
Moore’s Creek WSD
1,027,000 LF of pipe up to 42-in diameter
1 elevated tank
1 booster pump station
$45 M
Central Pender WSD
600,000 LF of pipe up to 16-inch diameter
2 elevated tanks
$27 M
Total: 308 miles of pipe, 3 tanks, and 1 booster station
Determine what is feasible
Identify system for 20-year needs
Consider projected customer density
Consider anticipated customer interest
Determine hydraulic requirements
238 miles of mains; 1 elevated tank
Identify Phase I system for affordable rates
Existing customer density and interest
Size lines to fit 20-year system
75.5 miles of mains; 1 elevated tank
2014 Update –Central District
2014 Update – Moore’s Creek District
Pender County UtilitiesAGENDA ITEM 4F
CUWSD
BRYAN MCCABE, PE
CUWSD
BOND REFERENDUM FAILED TO PASS IN 2006
TRIED AGAIN IN 2008 WITH
THE SAME RESULTS
DEBT REQUIRES PASSING
BOND
ALTERNATIVES FOR ISOLATED
PROJECTS
GRANTS FOR SCHOOLS
(PENDER COUNTY)
GRANTS FOR ECONOMIC
DEVELOPMENT (PENDER
COUNTY)
Pender County UtilitiesAGENDA ITEM 5
RATES
BRYAN MCCABE, PE
TYLER HIGHFILL, PE HIGHFILL INFRASTRUCTURE
RATES
RELATIVELY HIGH RATES
BASE RATE – DEBT SERVICE
USAGE – O&M
MUST FIND OTHER WAYS TO FUND ADDITIONAL PROJECTS
EVALUATE EXISTING WATER USE
AGREEMENTS
CUSTOMER GROWTH – WTP DEBT
Pender County UtilitiesAGENDA ITEM 6
STAFFING
BRYAN MCCABE, PE
Pender County Utilities - Staffing
SIGNIFICANT GROWTH IN RPTWSD
AVG 275 NEW CONNECTION PER YEAR
METER READ AND BILL CYCLE
CUSTOMERS PER CONNECTION
ADDITIONAL DEMAND AT WTP
811 LAW
AVG PRIOR TO LAW, 80 – 100 LOCATES PER MONTH
AVG NOW, 600 – 900 LOCATES PER MONTH
EMERGENCY RESPONSES – ESSENTIAL SERVICES
WATER MAIN BREAKS
EMERGENCY SERVICES
COLLECTION SYSTEM EMERGENCIES
FREEZING EVENT
Pender County Utilities - Staffing
Pender County UtilitiesAGENDA ITEM 7
WASTEWATER
BRYAN MCCABE, PE
Pender County Utilities - WASTEWATER
RPTWSD SYSTEM
CAPACITY
250,000 GPD AVAILABLE
97,906 GPD ALLOCATED
169,556 GPD UNALLOCATED
SYSTEM AVAILABILITY
INDUSTRIAL, COMMERCIAL, INSTITUTIONAL
NO RESIDENTIAL
HAVE RECEIVED REQUESTS
PREVIOUS SURVEY – 3 RESPONSES
EXTENSION TO BURGAW (WALLACE)
$9 MILLION
EXTENSION TO PCP WWTP
$20 MILLION
MKKAES (US 421 WWTP)
500,000 GPD AVAILABLE
90,000 GPD ALLOCATED
SERVICE AREA
COMMERCE PARK ONLY
EXTENSION TO BLUEBERRY
$2-3 MILLION (8” OR 12”)
MH WWTP
GRANT FUNDED FOR EXISTING RESIDENTS
NO GROWTH IN DISTRICT
ROCKY
POINT
SEWER
SCHEMATIC
Maple Hill Wastewater Treatment
Pender County UtilitiesAGENDA ITEM 8
DISCUSSION
BOARD OF COUNTY COMMISSIONERS