Change Orders amp Supplemental Agreements Georgia Chapter of ASHE Presented by Mike Cates PreConstruction Engineer Cobb County Department of Transportation April 15 2011 What Happens when a Change Order is required ID: 416565
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Cobb County DOT
Change Orders & Supplemental Agreements
Georgia Chapter of ASHE Presented by Mike CatesPre-Construction EngineerCobb County Department of TransportationApril 15, 2011Slide2
What Happens when a Change Order is required?
Cobb County Slide 3
Change Orders & Supplemental Agreements
Major Impacts to Staff Time
Board
of Commissioners must
approve
Public Meeting, televised,
newspaper, etc..Major impacts to staff timeSlide3
“Bad” Change Order….
Cobb County Slide 3Change Orders & Supplemental Agreements
Original Contract
$6,705,710.12
Supplemental Agreement No. 1 $ 38,992.25
Supplemental Agreement No. 2
$ 91,011.99
Supplemental Agreement No. 3 $ 101,723.08
Supplemental Agreement No. 4 $ 45,902.50
Supplemental Agreement No. 5 $ 38,312.37
Change Order No. 1 (final)
$ 84,270.45 Revised Contract $7,105,922.76
SA # 1 Incorrect Identification of Water Line
SA #2 Drainage not identified by surveyor
SA #3 Owner directed (Added Sidewalk)
SA #4 Incorrect Traffic Work (lengthened
decel
lanes)
SA #5 Over-Run of Erosion Control
Qtys
SA #6 Drainage and Asphalt Over-runsSlide4
“Good” Change Order….
Cobb County Slide 3Change Orders & Supplemental Agreements
Original Contract $8,750,220.30
Change Order No. 1 (final)
$ (52,050.15)
Revised Contract $8,698,170.15
No Issues with Plans were discovered requiring Change Orders
One final Change order with a savings…….Slide5
Change Orders & Supplemental Agreements
Cobb County Slide 2Common Causes of Change Orders
Survey
– “missed” information
Designer
unfamiliar with Project Site
Calculation of
Quantities
Looking at the plans in 3DDesigner familiarity with GDOT Spec BookSlide6
Survey Issues
Cobb County Slide 4
Change Orders & Supplemental Agreements
Most Important part of the design
Investigation of missing drainage
Identification of Utility Easements
Correct Location of Existing R/W & PLSlide7
Walking the Job…
Cobb County Slide 5Change Orders & Supplemental Agreements
Many designers do drive-
throughs
of the project
site
Few take the time to walk key parts of the
job
Should be done as soon as preliminary layout is createdShould be done prior to turning in Prelim PlansSlide8
Quantities
Change Orders & Supplemental Agreements
Cobb County Slide 6Slide9
Quantities
Cobb County Slide 7Change Orders & Supplemental AgreementsSlide10
Plans are 3D
Cobb County Slide 8Change Orders & Supplemental AgreementsSlide11
Spec Book
Cobb County Slide 9Change Orders & Supplemental Agreements
Designers need to be more familiar with GDOT Spec Book
Examples:
1. Pilot Holes – Pay Length
is
from top of ground not top of rock.
2.
Grading Complete – What is included?Slide12
Thank You
Mike Cates, Construction EngineerCobb County Department of Transportationwww.cobbcounty.org
Pictured: Construction on Windy Mac
Cobb County Slide 10