Lynnhaven River Green Ribbon SOC/Consent Decree RWWMP/Regionalization · · 2017-03-17SOC/Consent...
Transcript of Lynnhaven River Green Ribbon SOC/Consent Decree RWWMP/Regionalization · · 2017-03-17SOC/Consent...
Lynnhaven River Green Ribbon Committee
SOC/Consent Decree RWWMP/Regionalization
June 27, 2013
• Overview of System • Special Order by Consent
– Overview – Prompt Repairs – Private Property I/I - SLIP
• Consent Decree – Condition Assessment
• Consent Decree Stipulation • Consent Decree Modification/Regionalization
Outline
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Regional/HRSD Sanitary Sewer System
• Regional Network: – 1.6 million
population served – 5,800 miles of
gravity sewer – 1,500 PS – 1,200 miles FM
• HRSD System: – ~430 miles large
diameter FM – ~ 50 miles gravity – 81 PS – 13 STPs
Consent Order Overview
Data Collection and Flow
Monitoring • SSO characterization • Use of existing
information • System mapping (GIS) • Flow monitoring
procedures • Rainfall monitoring • Sewer flow evaluation • Flow evaluation
reporting
SSES Planning
• SSES Basin criteria • Prioritization
Hydraulic Performance Assessment
• Guidelines for development and application of hydraulic model
• Procedures and standards for calibration and verification
Condition Assessment of
Sewers and Pump Stations
• Guidelines for condition assessment
• Assessment standards • Reporting
requirements • Find and fix guidelines
Rehabilitation Planning
• Rehabilitation resulting from SSES work
• Evaluation of effectiveness of rehabilitation on I/I reduction
Regional Wet-Weather
Management Plan Development
• Capacity assessment • Level of service
selection • Capacity enhancement
solutions • Affordability
Data Collection and Flow
Monitoring • SSO characterization • Use of existing
information • System mapping (GIS) • Flow monitoring
procedures • Rainfall monitoring • Sewer flow evaluation • Flow evaluation
reporting
SSES Planning
• SSES Basin criteria • Prioritization
Hydraulic Performance Assessment
• Guidelines for development and application of hydraulic model
• Procedures and standards for calibration and verification
Condition Assessment of
Sewers and Pump Stations
• Guidelines for condition assessment
• Assessment standards • Reporting
requirements • Find and fix guidelines
• Model based on Flow Monitoring Data – Minimum 20% of Locality basins
• Truly a Regional Model – Not HRSD Model • Each Basin has Hydrology
• Calibrated using HRSD FPR Monitoring
Regional Hydraulic Model
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• Condition Assessment is performed • Brown and Caldwell reviews inspection results • Prompt Repair Committee review selected
results – Committee Members
Chris Stephan - Chief of North Shore Interceptors David Cooley - Chief of North Shore Engineering Karen Harr - Chief of South Shore Interceptors Phil Hubbard - Special Assistant for Compliance Richard Stahr - Vice President of Brown and Caldwell
• Committee determines if defect requires Prompt Repair
• If not Prompt Repair, goes to Rehabilitation Plan
Prompt Repairs
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Work Order PR 001 – 41st Street (Cont.)
24-inch gravity sewer and 16-inch force main replacement
24-inch force main replacement
Work Order PR 013 – Deep Creek
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24-inch force main replacement
Work Order PR 013 – Deep Creek (Cont.)
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• Pilot Program – HRSD Commission • Virginia Beach – Harton Circle - Malibu
– $4.4 Million in Replacement – 232 Homes Proposed – 163 Inspected – 18 Lateral Defects
• Localities Perform Comprehensive Rehabilitation – Reduce I/I
• HRSD Private Property – Sewer Lateral Inspection Program (SLIP)
Private Property Program Outline
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Why Are We Doing Private Property I/I - SLIP?
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What Will Happen During SLIP?
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Step 1: Test
Step 2: Analyze
Step 3: Repair
• Wet weather simulation/television inspection
Step 1: Testing
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• Negotiations – DOJ/EPA/DEQ • Locality 308 Request • 16 Iterations • Effective Date of Consent Decree - February 23,
2010 • Similar to SOC with a few exceptions
– Penalty - $900,000 – FPR – Quality Action Plan (QAP) – Interim System Improvements - $140 million – Condition Assessment – More Stringent – Stipulated Penalties for SSO’s and Projects
Consent Decree
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Condition Assessment Program
SPECIAL ORDER BY CONSENT – Virginia Department of Environmental Quality
CONSENT DECREE – Environmental Protection Agency
CONDITION ASSESSMENT PLAN
•267,850 feet of gravity sewer (100% of system) •1,278 manholes (100% of system) •255,646 feet of force main (10% of system)
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Gravity Sewer Inspection – all manholes and sewers 24 inches and smaller – CCTV
Unit price project for inspection and cleaning, $513,200
Gravity Sewer Inspection – sewers greater
than 24 inches in diameter – CCTV, Sonar and Laser
Unit price contract project for inspection and cleaning, $1,941,557
PROJECTS IDENTIFIED
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267,850 feet of gravity sewer (100% of system) 1,278 manholes (100% of system)
Force Main Inspection Level 1 and Level 2 Project
What is it? A utility type construction project to support special technology inspection tasks
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SONDE AND DROGUE
Not so simple unit price contract to inspect active pressurized force mains, $7,459,823 Initial Contract Value - CO #1 $2,462,725 Revised Contract Amount $9,992,548
FORCE MAIN AIR VENT INSERTION
Mobilizing equipment I Traffic control I Erosion and sediment control I Saw-cutting concrete and asphalt I Excavation, sheeting and shoring I Hot-tapping I Valve installation I Patching and paving I Specialty inspections I
GPS field record data I Flow augmentation
Construction Elements and Contracting
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TRAFFIC CONTROL
HOT-TAPPING
FLOW AUGMENTATION
Level 2 Inspection – BEM Wall Thickness
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• Consent Decree – Paragraph 167 – To comply with SOC – RWWMP due November
2013 – Paragraph allowed for RWWMP due date to be
extended until July 31, 2014 – Formal modification to CD
Consent Decree Stipulation
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• Regional Cooperation wavering • Flow Agreements – Localities/HRSD • May 2012 met with DOJ/EPA/DEQ in
Washington – They were receptive – Worked on Modification
Regionalization – CD Modification
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• Regional Study • Regional Hydraulic Model
– Preliminary Peak Flow Estimates – PPFE’s – Private Property I/I
• Comparative Analysis – Cost 2yr and 10 yr – Non-Regionalization – 14 Separate Localities &
HRSD – No one Controls Own interest – Regionalization – One System Owner/Operator –
Controls Own interest • Outlines the due dates for RWWMP • Additional Interim System Improvements
Regionalization – CD Modification
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• Study Complete – August 31, 2013 • Localities and HRSD – February 28, 2014 • Work out Transfer – February 28, 2015 • RWWMP
– Report NO – April 30, 2015 – Report Yes – Localities/HRSD NO – Oct. 1,2015 – Report Yes – Localities/HRSD YES –Oct. 1 2016
• Regionalization YES – HRSD Revised MOM – October 1, 2018
• 18 Additional Interim System Improvements
Regionalization – CD Modification
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Contrast Two Approaches
• Non-Regionalization – Rehab I/I reductions and costs from Locality PPFE – Locality Capacity Enhancements from Locality
Capacity Assessments – Regional Capacity Enhancements based on post rehab
flows from PPFEs – HRSD Committed Improvements Included
• Regionalization – Rehab I/I reductions and costs based on optimum level – Locality and Regional Capacity Enhancements based
on post rehab flows from optimum level – HRSD Committed Improvements Included
Treatment Plant Current Plan, # Catchments Rehab
Regionalized, # Catchments Rehab
Army Base 7 8 Atlantic 198 81 Boat Harbor 134 50 Ches-Liz 42 0 James River 56 19 Nansemond 117 52 VIP 29 36 Williamsburg 75 50 York River 82 22
TOTALS 740 318
Focused Comprehensive Rehabilitation
25 Preliminary Results subject to revisions
Questions
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