COBB COUNTY DOT CHANGE ORDERS & SUPPLEMENTAL AGREEMENTS Georgia Chapter of ASHE Presented by Mike...

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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

Transcript of COBB COUNTY DOT CHANGE ORDERS & SUPPLEMENTAL AGREEMENTS Georgia Chapter of ASHE Presented by Mike...

Page 1: COBB COUNTY DOT CHANGE ORDERS & SUPPLEMENTAL AGREEMENTS Georgia Chapter of ASHE Presented by Mike Cates Pre-Construction Engineer Cobb County Department.

C O B B C O U N T Y D O T C H A N G E O R D E R S & S U P P L E M E N T A L A G R E E M E N T S

Georgia Chapter of ASHE Presented by Mike CatesPre-Construction EngineerCobb County Department of Transportation

April 15, 2011

Page 2: COBB COUNTY DOT CHANGE ORDERS & SUPPLEMENTAL AGREEMENTS Georgia Chapter of ASHE Presented by Mike Cates Pre-Construction Engineer Cobb County Department.

What Happens when a Change Order is required?

Cobb County Slide 3

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•Major Impacts to Staff Time

•Board of Commissioners must approve

•Public Meeting, televised, newspaper, etc..

•Major impacts to staff time

Page 3: COBB COUNTY DOT CHANGE ORDERS & SUPPLEMENTAL AGREEMENTS Georgia Chapter of ASHE Presented by Mike Cates Pre-Construction Engineer Cobb County Department.

“Bad” Change Order….

Cobb County Slide 3

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Original Contract $6,705,710.12Supplemental Agreement No. 1 $ 38,992.25Supplemental Agreement No. 2 $ 91,011.99Supplemental Agreement No. 3 $ 101,723.08

Supplemental Agreement No. 4 $ 45,902.50Supplemental 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 LineSA #2 Drainage not identified by surveyorSA #3 Owner directed (Added Sidewalk)SA #4 Incorrect Traffic Work (lengthened decel lanes)SA #5 Over-Run of Erosion Control QtysSA #6 Drainage and Asphalt Over-runs

Page 4: COBB COUNTY DOT CHANGE ORDERS & SUPPLEMENTAL AGREEMENTS Georgia Chapter of ASHE Presented by Mike Cates Pre-Construction Engineer Cobb County Department.

“Good” Change Order….

Cobb County Slide 3

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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…….

Page 5: 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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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

Page 6: COBB COUNTY DOT CHANGE ORDERS & SUPPLEMENTAL AGREEMENTS Georgia Chapter of ASHE Presented by Mike Cates Pre-Construction Engineer Cobb County Department.

Survey Issues

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•Most Important part of the design•Investigation of missing drainage•Identification of Utility Easements•Correct Location of Existing R/W & PL

Page 7: COBB COUNTY DOT CHANGE ORDERS & SUPPLEMENTAL AGREEMENTS Georgia Chapter of ASHE Presented by Mike Cates Pre-Construction Engineer Cobb County Department.

Walking the Job…

Cobb County Slide 5

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•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

Page 8: COBB COUNTY DOT CHANGE ORDERS & SUPPLEMENTAL AGREEMENTS Georgia Chapter of ASHE Presented by Mike Cates Pre-Construction Engineer Cobb County Department.

QuantitiesCH

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• Read them and incorporate comments into the plans

Geo-Tech Reports

• Too 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

Page 9: COBB COUNTY DOT CHANGE ORDERS & SUPPLEMENTAL AGREEMENTS Georgia Chapter of ASHE Presented by Mike Cates Pre-Construction Engineer Cobb County Department.

Quantities

Cobb County Slide 7

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Common Quantity Busts

Asphalt Items, GAB, Concrete, Retaining Walls

Leveling IssuesErosion Control – Mulch, Silt Fence

Always triple check your big ticket

quantities!

Page 10: COBB COUNTY DOT CHANGE ORDERS & SUPPLEMENTAL AGREEMENTS Georgia Chapter of ASHE Presented by Mike Cates Pre-Construction Engineer Cobb County Department.

Plans are 3D

Cobb County Slide 8

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TSDesigners should take the XS, and at each station compare XS to Plan Sheets.

Do Construction Limits match?

Are we inside R/W & Easements

Are there existing ditches being filled in?

Is this slope appropriate?

Page 11: COBB COUNTY DOT CHANGE ORDERS & SUPPLEMENTAL AGREEMENTS Georgia Chapter of ASHE Presented by Mike Cates Pre-Construction Engineer Cobb County Department.

Spec Book

Cobb County Slide 9

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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?

Page 12: COBB COUNTY DOT CHANGE ORDERS & SUPPLEMENTAL AGREEMENTS Georgia Chapter of ASHE Presented by Mike Cates Pre-Construction Engineer Cobb County Department.

THANK YOU

Mike Cates, Construction EngineerCobb County Department of Transportation

www.cobbcounty.org

Pictured: Construction on Windy Mac

Cobb County Slide 10