a design-build success story dick sprague hdr, inc. landfill gas migration control
TRANSCRIPT
A Design-Build Success Story
Dick SpragueHDR, Inc.
Landfill Gas Migration Control
Purpose & Background
• Design-Build Project Delivery– Emerging delivery system in public sector– Single source of responsibility
• Faster, less contentious delivery• Not necessarily cheaper
• Landfill– Historic landfill cell began in early 1950s– New, lined landfill cell began in late 1990s– Landfill gas migration discovered in 2001
Landfill Site
Landfill Gas Migration
• Anaerobic decomposition– Predominantly methane and carbon dioxide
• March 2001 monitoring– High concentrations of Lfg at property boundary– >1,000 feet beyond property boundary
• May 2001– Issued engineering RFP– Informed state agency & neighbors
Extent of Contamination
4950
4940
4920
4900
4790
4770
4750
silty sand
fat clay
silty sand
silty clay
lean clay
poorly sorted sand
Design-Build Project
• Too little time for traditional design-bid-build• 2-part contract
– Several form contracts– AGC, AIA, EJCDC– DBIA is fairest to all parties– 2-Part form contract includes:
• Terms & Conditions• Scope• Price & Schedule
Design-Build Project (cont.)
• Part I - Concept Design & Proposal– 30% Design– Proposal for Part II
• Firm, fixed price based on bids• Drilling subcontractor• Equipment supplier• Balance of construction contractor
– Documents Belong to Owner• Negotiate with Part I contractor• Bid the work• Cancel the project
Design-Build Project (cont.)
• Part II– Final Design– Construction, Start-up & Warantee– Firm schedule based on WES commitments
• Contract (part II) signed on September 27• Completion planned for December 14
– “Best Value” Selection
Design-Build Project (cont.)
Design-Build Project (cont.)
• Performance– Drilling subcontractor failed to perform
• Primarily his lower tier subs• Third lower tier sub required to complete project
– Flare station operational December 14, accepted December 18
– 60 percent of wells operational on December 18; met commitment to state agency
– Final completion January 18
Design-Build Project (cont.)
Gas Monitoring Wells
Monwell I
-10.0
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
1/1
4/2
00
2
2/1
4/2
00
2
3/1
4/2
00
2
4/1
4/2
00
2
5/1
4/2
00
2
6/1
4/2
00
2
7/1
4/2
00
2
8/1
4/2
00
2
9/1
4/2
00
2
10
/14
/20
02
11
/14
/20
02
12
/14
/20
02
1/1
4/2
00
3
2/1
4/2
00
3
3/1
4/2
00
3
4/1
4/2
00
3
5/1
4/2
00
3
6/1
4/2
00
3
7/1
4/2
00
3
8/1
4/2
00
3
Date
lev
el CH4
O2
Static Pressure
Design-Build Project (cont.)
Design-Build Project (cont.)
Gas Monitoring Wells
Monwell I
-10.0
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
1/1
4/2
00
2
2/1
4/2
00
2
3/1
4/2
00
2
4/1
4/2
00
2
5/1
4/2
00
2
6/1
4/2
00
2
7/1
4/2
00
2
8/1
4/2
00
2
9/1
4/2
00
2
10
/14
/20
02
11
/14
/20
02
12
/14
/20
02
1/1
4/2
00
3
2/1
4/2
00
3
3/1
4/2
00
3
4/1
4/2
00
3
5/1
4/2
00
3
6/1
4/2
00
3
7/1
4/2
00
3
8/1
4/2
00
3
Date
lev
el CH4
O2
Static Pressure
Design-Build Project (cont.)
Design-Build Project (cont.)
Event Planned Actual
Engineering Contract
June 18 July 20
Construction Contract
October 1 September 27
Begin Construction
October 15 October 2
System Startup December 18
System Complete December 15 January 18
Design-Build Project (cont.)
Lump Sum Price
Change Orders
Net Price
Design-Build Project (cont.)
Lump Sum Price
Change Orders
Net Price
$929,367
($ 25,129)
_________
$904,238
Questions?
Design-Build Project (cont.)