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Item 1.H.
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| City Council Regular | |
| Date: | 12/16/2024 |
| Title: | W.O. 19-12, West End Reservoir Project, GC/CM Contract Change Order No. 3, Dewatering & Site Improvements |
| Presented by: | Debi Meling |
| Department: | Public Works |
| Presentation: | No |
| Legal Review: | Not Applicable |
| Project Number: | N/A |
RECOMMENDATION
Staff recommends that the City Council approve Change Order No. 3 to the Standard Agreement and General Conditions Between Owner and General Contractor/Construction Manager (Construction Contract) with Dick Anderson Construction, Inc. for the W.O. 19-12: West End Reservoir Project in the amount of $165,070.04.
BACKGROUND (Consistency with Adopted Plans and Policies, if applicable)
On December 11, 2023, City Council approved a Construction Contract with DAC for the West End Reservoir Project in the amount of $153,211.35. This initial contract Guaranteed Maximum Price (GMP) allowed the Project Team to begin dewatering the reservoir site through rental of temporary pumping equipment and purchase of permanent dewatering equipment.
Change Order No. 1 for the procurement of an electrical equipment substation for the Raw Water Pump Station (RWPS) for a GMP of $408,352.64 was approved by City Council on August 26, 2024. Early procurement of this equipment ahead of construction was necessary to maintain overall project schedule due to the 40-week lead time in delivering the project site.
On November 25, 2024, City Council approved Change Order No. 2 for the construction of the BBWA Raw Water Delivery (RWD) Facilities in a GMP amount of $13,553,020.76. Work includes construction of a BBWA Unloader Structure, Screen Structure, Diversion Channel, Raw Water Pump Station (RWPS), a Canyon Creek Diversion Structure, gravel access roads, and 36, 42, and 60-inch connecting piping.
Change Order No. 3 now under consideration includes: Cleaning accumulated organics and other materials out of the current pumping area, installing a deep pump well, extending 2 perforated pipes for future dewatering, adding electrical improvements, and placing 500 cubic yards of rock around the pump well.
Area improvements and installation of a deep-well submersible pump will allow for continuous and more efficient winter dewatering and contribute to the longer-term dewatering strategy for the north cell site. Groundwater in the area has been substantially reduced and freezing is an issue, so this implementation will allow for continued winter dewatering. In order that construction on the BBWA RWD project (Change Order No. 2) can start in the south cell area in December, 2024 the SWPP permit and BMPs are also included in this change order.
Change Order No. 1 for the procurement of an electrical equipment substation for the Raw Water Pump Station (RWPS) for a GMP of $408,352.64 was approved by City Council on August 26, 2024. Early procurement of this equipment ahead of construction was necessary to maintain overall project schedule due to the 40-week lead time in delivering the project site.
On November 25, 2024, City Council approved Change Order No. 2 for the construction of the BBWA Raw Water Delivery (RWD) Facilities in a GMP amount of $13,553,020.76. Work includes construction of a BBWA Unloader Structure, Screen Structure, Diversion Channel, Raw Water Pump Station (RWPS), a Canyon Creek Diversion Structure, gravel access roads, and 36, 42, and 60-inch connecting piping.
Change Order No. 3 now under consideration includes: Cleaning accumulated organics and other materials out of the current pumping area, installing a deep pump well, extending 2 perforated pipes for future dewatering, adding electrical improvements, and placing 500 cubic yards of rock around the pump well.
Area improvements and installation of a deep-well submersible pump will allow for continuous and more efficient winter dewatering and contribute to the longer-term dewatering strategy for the north cell site. Groundwater in the area has been substantially reduced and freezing is an issue, so this implementation will allow for continued winter dewatering. In order that construction on the BBWA RWD project (Change Order No. 2) can start in the south cell area in December, 2024 the SWPP permit and BMPs are also included in this change order.
ALTERNATIVES
City Council may:
- Approve Change Order No. 3 to the Standard Agreement and General Conditions Between Owner and General Contractor/Construction Manager (Construction Contract) with Dick Anderson Construction, Inc., or,
- Not approve Change Order No. 3. If Council does not approve this change order, progress gained on dewatering the north cell site over the last year will be lost due to freezing problems that will be encountered with the existing skid-mounted pump.
FISCAL EFFECTS
The W.O. 19-12: West End Reservoir Project was budgeted in FY25 using Water Funds in the amount of $72,878,045. Considering previously encumbered funds of $2,122,887.10, Change Order No. 1 in August in the amount of $408,352.64, Change Order No. 2 on November 25 in the amount of $13,553,020.76, and this change order in the amount of 165,070.04, there is $56,628,714.46 remaining in the budget. The remainder of the budget will be used for construction of the reservoir portion of the project and will be added by change order when the design is complete.