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Capturing the Benefits of GC/CM During Design Post Point Improvements

PNCWA - 23 October, 2012

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Serving Bellingham, WA

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Post Point WWTP Site

Wetlands

Neighborhood Impacts

Interpretive Trail Loop/ Public Access

Open Space (passive recreation)

Wildlife Habitat

Poor Soils

Bellingham Bay

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Project Objectives •  Double secondary capacity for BOD (to 39,800 lb/d)

•  Secondary Process Conversion – Pure Oxygen to Air Activated Sludge

•  Improve reliability/redundancy

•  Provide flexibility for future needs

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Proposed Improvements (computer rendering)

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What is GCCM ? •  "General contractor/construction manager"

–  a firm with which a public body has selected and negotiated a maximum allowable construction cost (MACC) to provide services during the design phase and to act as construction manager and general contractor during the construction phase.

•  Regulated under Washington’s RCW 39.10.340 – 410

•  Allows for MACC to be established at 90% design documents

•  Allows for potential early involvement of mechanical and electrical subcontractors.

•  Provides for customer site specific safety and quality plans

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Why GCCM for us? •  Very large project compared to our usual fare

•  Continual plant operation required

•  Complex interties and pipe crossings in tight footprint

•  Tight budget – VA needed to get desired scope

•  Complex permitting windows

•  Fast paced schedule

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Project Timeline •  Planning/Facilities Plan Approval 2008-2010

•  CPARB Application/Approval Jun-Sept 2010

•  GCCM RFP Selection Dec 2010

•  GCCM Preconstruction NTP Mar 2011

•  Preconstruction/ 90% Design Mar– Dec 2011

•  Major Package Pre-bid Jan – Mar 2012

•  Maximum Allowable Contract Cost

(MACC) Negotiation Feb – Jun 2012

•  Begin Construction Jul 2012

•  Complete Construction Summer 2014

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Post Point Team

GCCM  advisor  

Permi/ng  agency  rela5onships  

construc5on  bidding  exper5se  

rela5onships  with  trades  

technical    specialists  

na5onal  design  exper5se  

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•  Cost estimating and document review at major submittals

•  Continuous value analysis

•  Development of construction schedule sequencing

•  Opportunity for early bid packages

•  Allows for establishment of team relationships and synergy prior to construction

GCCM Involvement Tasks During Preconstruction/Design

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GCCM Involvement Benefits Independent cost estimating increases confidence

0

10

20

30

40

50

60

70

Comp  Sewer  Plan  WWTP  Phase  1&2

Facilities  Planning/30%  

Design

Resolved  30%  Design

30%  including  VA Resolved  60%  Design

90%  Design 90%  Design  w/  Bid  Alt

Following  Bids  (4/30)

Constructio

n  Co

st  (2013$)  -­‐

includ

ing  WSST  ($  in  millions)

Levels  of  Design

Mortenson

Carollo

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GCCM Involvement Benefits Document review – contractor perspective

• Less  risk  of  design  related  changes  and/or  claims  

•   Early  procurement  of  long  lead  items  

• GC/CM  can  resolve  constructability  issues  during  the  design  phase  

• Poten5al  for  faster  project  delivery  

• Improved  cost  es5ma5ng  for  budget  tracking  

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GCCM Involvement Benefits Accommodating multiple constraints in schedule

Restricted  Construc8on  Periods   J   F   M   A   M   J   J   A   S   O   N   D  

Great  Blue  Heron/Bald  Eagle  sensi8vity   X   X   X   X   X   X   X  

In-­‐water  construc8on  ac8vi8es   X   X   X   X   X  

Wet  Weather   X   X   X   X   X   X   X   X  

Process  shutdown  limita8ons   X   X   X   X   X   X   X   X   X   X   X   X  

•  Restricted environmentally sensitive areas

•  Constrained seasonally to handle flow

•  Sequence shutdowns to minimize interruptions

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GCCM Involvement Benefits Value Analysis - Overview •  Multiple project workshops

•  Goal: Improve the overall value of the project in 4 areas: 1.  Reduce Cost

2.  Improve Function

3.  Enhance Quality

4.  Reduce Risk

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GCCM Involvement Benefits Value Analysis - Cost Reduction •  Reviewed large pipe materials and

selected most cost-effective materials for current bidding climate

Same  performance  $100k  savings  

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GCCM Involvement Benefits Value Analysis - Cost Reduction •  Reviewed gates with Engineer and City

Staff; selected simpler (and less expensive) gates w/o sacrificing performance

Same  performance  $400k  savings  basin  covers  not  shown  for  clarity  

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GCCM Involvement Benefits Value Analysis - Improved Value •  Rehab existing building for CEPT and

provide another facility for maintenance

Eliminate proposed new building

Retrofit into existing building

Reduced  cost    $500k  savings  

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GCCM Involvement Benefits Value Analysis - Risk Reduction

Same  performance  Greatly  reduced  risk  Reduced  construc5on  impact  $1M  savings  

ground    surface    0’    

-­‐10’    

-­‐20’    

-­‐30’    

•  Reconfigured piping and ASB layout to reduce deep excavation and risk to existing critical structures

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Value Analysis Summary •  22 Major modifications reviewed

•  10 Accepted major modifications

•  12 Rejected major modifications

•  $2.2 Million in savings realized

•  $1.5 Million in performance modifications

•  Result: $0.7 Million in net savings

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GCCM Involvement Benefits Continued Value Analysis - Cost Reduction

Same  performance  up  to  $250k  savings  

Confirmed  equal  flow  split  

Confirmed  solids  profile  

•  Refined analysis of unsymmetrical flow splitting

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GCCM Involvement Benefits Continued Value Analysis – Risk/Cost Reduction •  Identified “change in conditions” with

Contractor during design phase; proactively modified electrical layout

Reduced  risk  and  cost  

Record  Drawings   Inves7ga7ons  

Redundant  Power  Loop  Design  Revision  

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GCCM Involvement Benefits Additional key GCCM input •  Large yard-piping reroute

•  Sequencing impacts of permits fully mapped out

•  Intertie procedures reviewed

•  Equipment procurement flexibility

•  Construction approach/risks detailed

•  Better understanding of cost allocation

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Current Status •  Construction Phase

–  3 months into 2 year timeline •  Excavation/initial mitigation complete •  $400,000 buyout overage estimate •  Ongoing discussion on use of Risk

Contingency •  Key intertie still not fully planned •  Contractor staffing up •  Weather/permitting working well •  QC/QA Streamlining •  First substantial payment apps

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In Hindsight Contracting Challenges

•  RFFP scoring ambiguities •  Buyout bidding process undefined during

preconstruction process •  Establish bidding/buyout procedure earlier •  Fine tune Negotiated Support Services (NSS) prior

to Final Proposals (RFFP) •  Verbiage regarding SGCs against contract time •  Revise RFFP staffing requirements •  Build in buyout procedures and risk contingency use

language

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In Hindsight Cost and Risk Reduction

•  Pre-bid estimate was limited in reflecting the bidding condition –  Local/regional impacts of union obligations

–  Other local bidding projects

•  Some construction challenges not fully understood during preconstruction

•  More in-depth intertie planning and investigation during preconstruction may have been needed

•  GCCM staffing carry-through difficulties

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Thanks for your time!

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GCCM Involvement Benefits Value Analysis - Improved Performance •  Improved site storm

Improved  performance  $200k  increase