COBB COUNTY DOT CHANGE ORDERS & SUPPLEMENTAL AGREEMENTS Georgia Chapter of ASHE Presented by Mike Cates Pre-Construction Engineer Cobb County Department.

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Presentation transcript:

COBB COUNTY DOT CHANGE ORDERS & SUPPLEMENTAL AGREEMENTS Georgia Chapter of ASHE Presented by Mike Cates Pre-Construction Engineer Cobb County Department of Transportation April 15, 2011

What Happens when a Change Order is required? Cobb County Slide 3 C HANGE O RDERS & S UPPLEMENTAL A GREEMENTS Major Impacts to Staff Time Board of Commissioners must approve Public Meeting, televised, newspaper, etc.. Major impacts to staff time

Bad Change Order…. Cobb County Slide 3 C HANGE O RDERS & S UPPLEMENTAL A GREEMENTS Original Contract$6,705, Supplemental Agreement No. 1$ 38, Supplemental Agreement No. 2 $ 91, Supplemental Agreement No. 3$ 101, Supplemental Agreement No. 4$ 45, Supplemental Agreement No. 5$ 38, Change Order No. 1 (final)$ 84, Revised Contract$7,105, SA # 1Incorrect Identification of Water Line SA #2Drainage not identified by surveyor SA #3Owner directed (Added Sidewalk) SA #4Incorrect Traffic Work (lengthened decel lanes) SA #5Over-Run of Erosion Control Qtys SA #6Drainage and Asphalt Over-runs

Good Change Order…. Cobb County Slide 3 C HANGE O RDERS & S UPPLEMENTAL A GREEMENTS Original Contract$8,750, Change Order No. 1 (final)$ (52,050.15) Revised Contract$8,698, No Issues with Plans were discovered requiring Change Orders One final Change order with a savings…….

C HANGE O RDERS & S UPPLEMENTAL A GREEMENTS Cobb County Slide 2 Common Causes of Change Orders Survey – missed information Designer unfamiliar with Project Site Calculation of Quantities Looking at the plans in 3D Designer familiarity with GDOT Spec Book

Survey Issues Cobb County Slide 4 C HANGE O RDERS & S UPPLEMENTAL A GREEMENTS Most Important part of the design Investigation of missing drainage Identification of Utility Easements Correct Location of Existing R/W & PL

Walking the Job… Cobb County Slide 5 C HANGE O RDERS & S UPPLEMENTAL A GREEMENTS 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 created Should be done prior to turning in Prelim Plans

Quantities C HANGE O RDERS & S UPPLEMENTAL A GREEMENTS Read them and incorporate comments into the plans Geo-Tech Reports Overly dependent on Computer Quantities Future Cobb Project – all consultants will utilize the same SOQ Sheets to be provided by Cobb Should be calculated sheet by sheet Cobb County Slide 6

Quantities Cobb County Slide 7 C HANGE O RDERS & S UPPLEMENTAL A GREEMENTS Common Quantity Busts Asphalt Items, GAB, Concrete, Retaining Walls Leveling Issues Erosion Control – Mulch, Silt Fence Always triple check your big ticket quantities!

Plans are 3D Cobb County Slide 8 C HANGE O RDERS & S UPPLEMENTAL A GREEMENTS

Spec Book Cobb County Slide 9 C HANGE O RDERS & S UPPLEMENTAL A GREEMENTS 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?

THANK YOU Mike Cates Mike Cates, Construction Engineer Cobb County Department of Transportation Pictured: Construction on Windy Mac Cobb County Slide 10