Section 1

Report
District of Columbia Water and Sewer Authority
George S. Hawkins, General Manager
DBIA-MAR
Monthly Luncheon
Water Wastewater Design-Build Projects
Hosted by:
DC WATER
Presenters:
Gus G. Bass, DC Water
Phillip Braswell, Brown and Caldwell
Donal Barron, Greeley and Hansen
Bo Bodniewicz, AECOM
July 17, 2012
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Introduction to DC Water and Sewer Authority
(DC Water)
DC Water
 Provides
•
•
•
drinking water distribution for DC
required wastewater collection and
treatment
stormwater collection and conveyance
 Treats wastewater for a population of
2.1 million
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•
•
District of Columbia
Montgomery & Prince George’s counties, MD
Fairfax & Loudoun counties, VA
Blue Plains Advanced
Wastewater Treatment Plant
 Operates the world’s largest advanced wastewater treatment plant
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•
Average daily capacity, 370 MGD
Peak daily capacity, 1 billion+ gallons
 Serves a regional area of approx. 725 Sq Mi
2
Blue Plains Service Area
Dulles
International
Airport
Sewer
Blue Plains Wastewater
Treatment Plant
3
Past Construction Dollars Committed
 From 2006 to Present (June 1, 2012), DC Water committed more
than $2.2 Billion for construction projects in the areas of:
•
Blue Plains upgrades
and improvements
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Combined sewer overflow, outfall rehabilitation,
and pumping station
projects
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Sanitary pumping facilities
and trunk sewer upgrades
•
Water distribution and water
facility upgrades
Construction crews install a
large diameter water main
4
Projected DC Water CIP Commitments for
Construction, FY 2012 – FY 2016
 Wastewater Treatment – $1.3B, including
Biosolids – $142M
• Enhanced Nitrogen Removal and Other
Associated Site Work – $119M
• Liquid processing – $128M
• Plant wide – $26M
Our Capital Improvement
Sanitary Sewer – $269M
Program (CIP) for the next
CSO/LTCP – $324M
10 years is valued at
Stormwater – $11M
$4 billion, and over the next
20 years, $8.2 billion.
Water – $235M
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The Next Several Slides Detail
Upcoming Construction Projects
at Blue Plains and Throughout
the District of Columbia
for FY2012 through FY 2016
6
Blue Plains Service
 Design and construct projects that will rehabilitate, upgrade, or provide
new facilities at Blue Plains as well as to meet its National Pollutant
Discharge Elimination System (NPDES) permit requirements
 Reduce biosolids odors, both on site and in the final product leaving the
plant
 Projects:
• Enhanced Total Nitrogen Removal
• Biosolids Management
• Blue Plains Tunnel Construction
• Other Plant-wide Upgrades
Estimated Construction
Value FY2012 – FY2016
$410 – $420 million
7
Sanitary Sewer Service
 System includes 600 miles of
large interceptor sewers and
smaller gravity collection sewers
 Continue to assess
condition of sanitary
sewer system
Estimated Construction
Value FY2012 – FY2016
$150 – $270 million
 Projects include:
•
Rehabilitation and
replacement of sewers
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Minimize infiltration / inflow
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Combined Sewer Overflow Service
 Reduce overflow by a projected
96 to 98 percent
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Improve water quality
•
Reduce debris in our
local waterways
Estimated Construction
Value FY2012 – FY2016
$536 – $618 million
 Upgrade pumping stations to increase their pumping
capacity
 Develop and construct projects to control wet weather
related pollution
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Stormwater Service
 Replace undersized, aging, or
deteriorated storm sewers
 Projects include
•
Extensions to the system
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Relief of certain storm sewers
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Rehabilitate or replace
structurally deteriorating
storm sewer systems
Estimated Construction
Value FY2012 – FY2016
$10 – $15 million
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Water Service
 Design and construction projects that
maintain water quality, improve water
pressure, and provide reliable fire
protection
 System includes approximately
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•
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Estimated Construction
Value FY2012 – FY2016
$140 – $240 million
1,300 miles of pipe
36,000+ valves of various sizes
9,000 fire hydrants
 Projects: Rehab & replacement of
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water mains
storage facilities
pumping stations
 Continued replacement of house services
(lead, copper, or galvanized) and service meters
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DC Water Large Projects
In addition to our CIP, larger projects that have
started and will continue over the next several
years include:
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Biosolids
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Clean River Projects (Long Term CSO Control Plan)
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Tunnel Dewatering Pumping Station and Enhanced
Clarification Facility
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BIOSOLIDS
PRESENTED BY Phil Braswell
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Blue Plains Advanced Wastewater Treatment Plant
(August 2010)
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14
Blue Plains Advanced Wastewater Treatment Plant
(July 2012)
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15
Biosolids Management Program
 Updated Biosolids Management Plan (December 2008)
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Produce Class A product using thermal hydrolysis
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Reduce quantity of biosolids shipped off-site
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Use biogas generated to produce steam and power
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Control capital and program costs
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Implement by January 2015
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Program Components & Delivery Methods
Emissions
Gravity
Thickeners
Electricity
DB ($208M)
R
PreDewatering
DAFTs
DBB ($6.0M)
DBO ($83M)
Biogas Treatment and CHP
Steam
Thermal
Hydrolysis
Mesophilic
Anaerobic
Digestion
R
Final
Dewatering
Class A
Loadout
Recycle
Processing
R
Lime
Dewatering
DBB ($78M)
Biogas
R
R
Site
Preparation
Mix
Store &
Loadout
Class B
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Program Components & Delivery Methods
• All projects delivered and are under construction
• Increase from 2010 = $42M
 FDF – scope increase ($44M-$78M)
• Schedule got tighter
 CHP – PES costs for design and construction and mark-up
undervalued
• Undervalued long term cost
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Reasons for Considering Alternative Delivery – 2010
Program
• Schedule
• Improved coordination
• Potential innovation
 Digester construction
 Construction sequencing
 Interface coordination
• CHP not part of DC Water expertise
• How is it working out? 2012
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Schedule
 2008 Facility Plan suggested January 2014
• PM Contract 2009
• Scope Confirmation – late 2009

New Dewatering Facility – went traditional DBB
• Alternative Delivery Bumps
New regulations
 Survey of contractors/engineers
 How to deal with Cambi (9 months)
 30% design (CHP and MPT)
 New type contract
 CHP Financial Model
 Air Permit
• Construction w/o 100% design
 Alternative Delivery saved time
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