Regional Water System
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Waterline Relocations Along State Highways in Dallas, Rockwall, and Kaufman Counties; Project No. 101-0607-22; Contract 607D - 54-inch Lake Tawakoni Water Supply Relocation Along State Highway 276 (SH 276) in Rockwall County; Change Order No. 1
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SUBJECT
recommendation
Authorize a deductive amount of ($734,825.30) and add an additional thirty-seven (37) calendar days for a construction change order with J&L Construction, LLC.
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PURPOSE
This action authorizes a change order reducing the overall cost by $734,825.30 as well as adding thirty-seven (37) calendar days to the construction contract.
RECOMMENDATION
The Executive Director, NTMWD staff and Teague, Nall, and Perkins, Inc. (TNP) recommend the Board of Directors authorize a construction change order as follows:
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Contractor: |
J&L Construction, LLC |
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Scope: |
Change Order No. 1 |
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Project: |
No. 101-0607-22 Waterline Relocations Along State Highways in Dallas, Rockwall, and Kaufman Counties - Contract 607D - 54-inch Lake Tawakoni Water Supply Relocation along State Highway 276 (SH 276) in Rockwall County |
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Amount: |
($734,825.30) |
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DRIVER(S) FOR THIS PROJECT
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Strategic Objective: |
1.1 High Quality Services 1.4 Reliable and Resilient Systems |
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☐ Regulatory Compliance |
☐ Asset Condition |
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☐ Capacity |
☐ Redundancy/Resiliency |
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☒ Relocation or External Requests |
☐ Operational Efficiency |
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☐ Safety |
☐ Administrative |
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☐ Policy |
☐ Other _____________ |
BACKGROUND
• The Texas Department of Transportation (TxDOT) is planning various road improvements in Dallas, Rockwall, and Kaufman Counties that will encroach on existing NTMWD water line easements.
• These encroachments create conflicts with NTMWD water pipelines, valves, and vault structures, requiring varying degrees of relocation or protection.
• The design for these multiple relocations associated with TxDOT expansions is being completed under a single Engineering Services Agreement.
• To facilitate timing or material availability among the multiple geographically unique sites, the construction activities were separated into several work packages (607D is one of six work packages on Project No. 101-0607-22).
PROJECT PURPOSE
• This work package 607D is along State Highway (SH) 276 from Farm-to-Market Road (FM) 551 to the Hunt County Line.
• Maintain protection of existing infrastructure by relocation and other protective measures, such as extending protective casings for waterlines at revised wider road crossings due to changes in TxDOT right-of-way widths.
PROJECT COMPONENTS
• Relocation of 54-inch bar-wrapped pipe raw water line at six locations for a total of approximately 1,700 linear feet (LF).
• Installation of approximately 200 LF of 72-inch diameter steel casing at one location.
• Installation of new cathodic protection elements and relocation of existing elements including a rectifier station.
• Installation and relocation of appurtenances, such as access manways and blow-off assemblies.
PROPOSED CHANGE ORDER
• Proved additional stone rip rap around a blow-off assembly location to prevent erosion of the drainage.
• Remove pipe to be abandoned in lieu of grout in place
o At the time of design and bidding, it was anticipated that TxDOT would be working in this area before the NTMWD contractor could address pipe removal. However, TxDOT will not begin work as anticipated, providing the NTMWD contractor time to address pipe removal instead of grouting in place (the intent was to grout in place to ensure the NTMWD contractor was clear of the proposed TxDOT project; there is now ample time to fully remove the relocated sections of pipe).
• Remove temporary and permanent fencing items
o At the time of design and bidding, the arrangement with the property owner on fence relocation was not finalized. Bid items were placed in the construction contract to relocate the fence. Ultimately, an agreement was reached with the property owner, who reimbursed him directly for the removal and replacement of existing fencing.
• Remove some elements of cathodic protection
o At the time of cathodic protection design, it was assumed more locations would be affected by TxDOT improvements. As the TxDOT designs were finalized, it was determined some areas would not need pipe relocations.
• Due to NTMWD’s system operational constraints, on September 17, 2024, the first shutdown was delayed nine hours from when the contractor’s welders were scheduled to begin work; therefore, reimbursement of the standby time is proposed.
• Conditions warranted the addition of 45-degree fittings at two blow-off assemblies (ductile iron discharge piping) to adequately reach above ground at the optimal locations along the drainage channels.
• Add 37 contract calendar days to adjust the shutdown period to January and February of 2025.
o Due to NTMWD’s system operational constraints to ensure full annual water allocation from Lake Tawakoni, the 25-day contract-stipulated shutdown period is proposed to be shifted to January and February of 2025 to tie in the five remaining sections of the water line.
FUNDING
Funding in the amount of ($734,825.30) will be credited back to the Regional Water System Capital Improvement Fund.