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Item 9DCITY OF SOUTH LAKE MEMORANDUM (September 7, 2010) To: Shana Yelverton, City Manager From: Robert H. Price, P.E., Director of Public Works Subject: Approve Change Order No. 6 for the Neighborhood Improvement Project of Heatherwood Estates, Royal Oaks Addition, and Twin Creeks Addition for additional paving improvements with North Texas Contracting, Inc. in the amount of $75,327.00 Action Requested: Approve Change Order No. 6 for the Neighborhood Improvement Project of Heatherwood Estates, Royal Oaks Addition, and Twin Creeks Addition for additional paving improvements with North Texas Contracting, Inc. in the amount of $75,327.00. Background Information: The Capital Improvements Program (CIP) includes funds for the construction of sewer and paving improvements for several neighborhoods within the City. Cheatham and Associates completed the final design and prepared contract documents in October of 2009. The City Council awarded the project on November 3, 2009 to North Texas Contracting, Inc. Approximately 9,800 linear feet of 8" and 10" sewer line will be constructed within the Heatherwood, Royal Oaks, and Twin Creeks neighborhoods as well as along East Dove Road between Lonesome Dove Road and Kimball Avenue. Once completed, the sewer line will serve approximately 70 residential and commercial properties. Also included in the project is the reconstruction of the streets within these neighborhoods and East Dove Road between Lonesome Dove and Kimball Avenue. To comply with the City's master water plan, a 12" water line will also be constructed along East Dove Road from Lonesome Dove and Kimball Avenue to replace the existing substandard 8" water line. The construction along Primrose Lane included the construction of a sewer line, replacing the existing water line, minor drainage improvements, and widening and reconstruction of the road. Sewer was also installed along Pearson Lane from Johnson Road to Gray Lane. The City Manager approved Change Order No. 1 in the amount of $6,740.00 on January 14, 2010. This change order consisted of the relocation of a 12 -inch water line along Carroll at Primrose due to conflicts with the storm sewer. On February 22, 2010, the City Manager approved Change Order No. 2 in the amount of $18,641.00. This work included the relocation of a 12 -inch water line on Pearson partially located under pavement that was in conflict with the proposed location of the sewer line. Change Order No. 3 in the amount of $12,630.00 was approved on April 6, 2010 by the City Manager. The work consisted of approximately 285 linear feet of 4 inch under drain to be installed along the south edge of Primrose Lane to relieve the area of excess ground water for the purpose of stabilizing the road for paving activites. Change Order No. 4 in the amount of $778,949.00 consisted of several revisions to the design of the sanitary sewer within the Heatherwood Estates, Royal Oaks Addition, and Twin Creeks Addition neighborhoods as well as portions of the sewer along East Dove Road. Change Order No. 4 also included work associated with relocating approximately 700 linear feet of 12 inch water line from the north right -of -way into the west bound lane of East Dove Road due to a conflict with a 4 -inch steel gas line. On June 3, 2010, the City Manager approved Change Order No. 5 in the amount of $2,454.00. This work included the removal and replacement of a storm sewer culvert as well as a 24" x 18" reducer to connect the pipe to a 24 -inch storm drain pipe. Staff is proposing in Change Order No. 6 that the construction sequence for the portion of Dove Road between Sunshine Lane and N. Kimball Ave. be amended for the paving contractor to place a 2 -inch Type "B" Asphalt binder course on the roadway immediately after the remixing and compaction of the subgrade. The purpose of this change is to insure the travelling public's safety and maintenance of traffic throughout the construction period. The placement of this 2 -inch asphalt mat will provide both a substantial driving surface as well as a working surface on which the concrete ribbon curb can be constructed. This method will require the contractor to mix and compact to a greater depth as well as require the contractor to haul off additional subgrade material in order to match the grade of the existing roadway. Financial Considerations: On November 3, 2009, the City Council approved a bid amount of $3,748,737.54. The previously approved change orders increased the total contract amount to $4,568,151.54. Staff recommends that City Council approve Change Order No. 6 in the amount of $75,327.00 resulting in a total project cost of $4,643,478.54. Staff recommends funding Change Order No. 6 from the unencumbered PMA funds. Unallocated funds are available in the following existing CIP account for this Change Order. Upon approval by City Council of this Change Order, these unallocated funds will be allocated towards this project and moved to account number 209499 - 598804- R0038. 209499 - 598801 -R0014 $ 75,327 Total Additional Budgeted Funds $ 75,327 Strategic Link: The construction of the water, sewer, and paving improvements links to the city's strategy map relative to the focus areas of Infrastructure and Performance Management and Service Delivery. The specific corporate objectives that are met by the construction of these improvements include: Providing High Quality Customer Service and Investing to provide and maintain high quality public assets. Citizen Input/ Board Review: N/A Legal Review: N/A Alternatives: The City Council may approve Change Order No. 6 or deny it. Supporting Documents: Location Map Change Order No. 6 Staff Recommendation: Approve Change Order No. 6 for the Neighborhood Improvement Project of Heatherwood Estates, Royal Oaks Addition, and Twin Creeks Addition for additional paving improvements with North Texas Contracting, Inc. in the amount of $75,327.00 Staff Contact: Robert H. Price, P.E., Public Works Director Gordon J. Mayer, Jr., P.E., City Engineer Michelle McCullough, P.E., Civil Engineer L V o �3 c� N 00 J -ii � o L 0 t 2 CHANGE ORDER No. 6 Dated: September 7, 2010 OWNER'S Project No. 08 -031 Project: Neighborhood Sanitary Sewer, Water and Pavinglmprovements to serve Heatherwood Estates, Royal Oaks Addition, Twin Creeks Addition, Primrose Lane, Pearson Lane, and East Dove Road OWNER Citv ofSouthlake Contract for Sewer, Water, Drainage, and Paving Improvements Contract Date: November 16, 2009 To: North Texas Contracting, Inc. Contractor You are directed to make the changes noted below in the subject contract for the dollar amount stated below including all labor, equipment, materials, overhead, and profit: Nature of the changes: Paving — Sunshine to N. Kimball Ave. — Add 2 -inch Type "B" binder course to subgrade upon mixing lime into subgrade. Increase: Pay Item No. 1 —Unclassified street excavation — 2,615 C. Y. @$9.00 /C.Y. $23,535.00 Pay Item No. 2 — F &I 2" HMAC pavement — 5,880 S. Y. @$8.00 /S. Y. $47,040.00 Pay Item No. 8 — F &I cement for stabilization — 20 TON @$120.00 /TON $2,400.00 Add: Construct additional depth (2 ") cement stabilized subgrade — 5,880 SY @$$0.40 1SY $2,352.00 TOTAL $75,327.00 These changes result in the following adjustment of contract price and contract time: Original Contract Price $ 3,748,737.54 Contract Price Including Previous Change Orders $ 4,568,151.54 Net Increase Resulting from this Change Order $ 75,327.00 Current Contract Price Including Change Order #6 $ 4,643,478.54 The above changes are approved: City ofSouthlake City li Title: Ci , E 1 tanager Date: 1 2010 Page 1 of 2 Contract Time Prior to this Change 442 calendar days (Days or Date) Net Increase Resulting from this Change Order 0 calendar days (Days) Current Contract Time Including this Change Order 442 calendar days (Days or Date) The above changes are recommended: City ofSouthlake City li Title: City Engineer Date: City ofSouthlake City li Title: Proiect-Wanager Date: City ofSouthlake City li Title: Director Public Works Date: North Texas Contracting, Inc. Contractor li Date: Page 2 of 2