Item 9D (2)ITEM 9D
Approve Change Order No. 6 for the Neighborhood Improvement Project of Heatherwood Estates, Royal Oaks Addition, and Twin Creeks Addition for additional sanitary sewer improvements with
North Texas Contracting, Inc. in the amount of $75,327.00
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Project Location
Heatherwood, Royal Oaks, Twin Creeks
Segment of Dove Road
affected by Change Order No. 6
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BACKGROUND
2001 – Completed preliminary design engineering for the neighborhood sewer project
April 2008
City Council awarded contract to prepare final plans and specifications for the neighborhood sewer
additional pavement reconstruction of the neighborhood streets and East Dove Road from Lonesome Dove Rd to Kimball Ave added
sewer improvements along Pearson Road from Johnson Road to Gray Lane added
water, sewer, storm, and paving improvements added along Primrose Lane
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BACKGROUND
November 3, 2009
City Council awarded construction contract to North Texas Contracting, Inc.
May 4, 2010
City Council approved an amendment to the engineering contract to move the sewer out into the road using the directional boring method
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Proposed Change Order No. 6
Proposed Changes:
Affects Dove Rd from Kimball to Sunshine
Provides for asphalt surface during concrete ribbon curb construction period.
Provides safety to motorists and addresses potential delays due to adverse weather conditions.
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Proposed Change Order No. 6
Covered in Change Order:
Mixing existing subgrade material to depth of 15 inches after scarification;
Removal and haul off of top 7 inches of material to provide for additional thickness of asphalt binder course;
Cement stabilize 8 inches of subgrade (already in contract);
Apply 2 inches of Type ‘B’ Asphalt Binder Course
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Approve Change Order No. 6 with North Texas Contracting
Original Contract $3,748,737.54
Change Orders No. 1-5 $819,414.00
Change Order No. 6 $75,327.00
Total Contract Amount $4,643,478.54
Allocate additional PMA funds to this project
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RECOMMENDATION
Approve Change Order No. 6 for the Neighborhood Improvement Project of Heatherwood Estates, Royal Oaks Addition, and Twin Creeks Addition for additional sanitary sewer improvements with
North Texas Contracting, Inc. in the amount of $75,327.00
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Questions?
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BACKGROUND
January 2010, Change Order No. 1
approved by the City Manager
included lowering of the 12-inch water line on Primrose Lane associated with the Primrose sewer installation
$6,740.00
February 2010 , Change Order No. 2
approved by the City Manager
included 12-inch water line lowering on Johnson Road associated with the Pearson sewer installation
storm drain line also adjusted due to conflict
$18,651.00
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BACKGROUND
April 2010, Change Order No. 3
approved by the City Manager
included 285 feet of a 4-inch french drain along Primrose Lane to alleviate the high ground water due to the recent rainfall in order to stabilize the road for paving activities
$12,630.00
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Change Order No. 4
Change Order No. 4 exceeded City Manager Approval Authority - $778,949.00
Current design
Location of sewer line is 5 feet west of the pavement in ROW maintained by residents
Heavy landscaping, new driveways, and existing retaining walls along the current alignment
13 properties along East Dove Road currently designed to flow to proposed sewer to be constructed along Creekside Drive – sewer service would be delayed due to the proposed Creekside
lift station issues
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Change Order No. 4
Changes
move location of sewer into road but use original directional drilling method to install
if repairs are required to fix “bellies” or sags in the line, the road is dug up and this would avoid digging up resident’s landscaping and disturbing retaining walls
Neighborhood roads are still scheduled for paving reconstruction
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Change Order No. 5
Changes
Provided removal and replacement of storm culvert pipe
City Manager Approved
$ 2,454
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