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Cobb County DOT - PowerPoint Presentation

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Cobb County DOT - PPT Presentation

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

county change orders supplemental change county supplemental orders cobb amp agreements slide agreement plans contract order spec drainage quantities

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Slide1

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