Memorandum
City of Lawrence
Public Works
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TO: |
David P. Cronin, P.E., City Engineer Mark Thiel, Assistant Director of Public Works Charles F. Soules, P.E., Director of Public Works |
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FROM: |
Steven M. Lashley, P.E., Project Engineer |
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DATE: |
September 3, 2015 |
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RE: |
Project No. PW1437 – Bob Billings Pkwy Turn Lane Improvements at Corpus Christi Church (Benefit District) – Approve Change Orders |
Background / Project Description
In October of 2014 Corpus Christi Church signed a petition not to protest the formation of a benefit district and the City Commission approved Resolution 7094 directing improvements to be completed, 100% paid for by the Corpus Christi benefit district. The project scope included the construction of a dedicated left turn lane on Bob Billings Pkwy, warranted through a Traffic Impact Study with the additional site improvements. The project was awarded to RD Johnson Excavating Co., Inc. on March 24, 2015 and started in late May 2015. The project was completed and accepted on August 17, 2015.
Change Orders & Quantity Overruns
During this project, additional costs from pavement, sidewalk, storm sewer, and irrigation occurred. The table below lists the costs for these items.
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Change Orders |
Cost |
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Additional Pavement Patching Additional pavement patching was included to fully address the depth/ width of needed pavement removal and replacement of failed areas on Bob Billings Pkwy prior to application of surface overlay. |
$5,125.00 |
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Added Retaining Curbwall An added 158 linear feet of curbwall was installed to the backside of the 6 foot wide replacement sidewalk to address and retain the steeper slopes, minimizing overall impact and reestablishment. |
$4,476.00 |
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Storm Sewer –Replacement Extension &Underdrain Tie-in & Flowable Fill Additional storm sewer pipe (8 linear feet) was installed to replace an existing failed section. Found underdrains were tied into the new inlet at Station 35+93. For storm sewer inlets and pipe installation, an additional 47 cubic yards of flowable fill was applied due to necessary removal limits under proposed pavement widening areas. |
$6,605.00 |
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Miscellaneous – Irrigation & Erosion Mats Miscellaneous costs included repair of an existing sprinkler system and the installation of straw erosion mats to maintain some steeper slope areas for grass reestablishment. |
$794.20 |
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Total Additional Costs |
$17,000.20 |
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Original Contract Cost |
$202,507.28 |
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Total Project Cost |
$219,507.48 |
Project Funding
The total project cost with change orders is under the original $250,000 construction budget for the project. The project is being funded by general obligation bonds and temporary notes of the City in the estimated maximum principal amount of $250,000 per Resolution No. 7094.
Action Request
Public Works staff requests approval of Change Orders in the amount of $17,000.20 for Project No. PW1437 – Bob Billings Pkwy Turn Lane Improvements at Corpus Christi Church (Benefit District).