HomeMy WebLinkAbout2020-09-15; City Council; ; Acceptance of Bids and Award of Contract to HWK Construction Services for the Poinsettia Lift Station Force Main Hydraulic Surge Protection ProjectMeeting Date: Sept. 15, 2020
To: Mayor and City Council
From: Scott Chadwick, City Manager
Staff Contact: Vicki Quiram, General Manager
vicki.quiram@carlsbadca.gov, 760-438-2722
David Hull, Associate Engineer
david.hull@carlsbadca.gov, 760-603-7322
Subject: Acceptance of Bids and Award of Contract to HWK Construction Services
for the Poinsettia Lift Station Force Main Hydraulic Surge Protection
Project
Recommended Action
Adopt a resolution accepting bids and awarding a contract to HWK Construction Services for
construction of the Poinsettia Lift Station Force Main Hydraulic Surge Protection, Capital
Improvement Program Project No. 5503-14, in an amount not to exceed $377,304.
Executive Summary
The project includes installation of a pneumatic surge tank and related equipment necessary to
protect the Poinsettia Lift Station’s force main pipeline from hydraulic surge impacts. The
improvements will help increase the useful life of the pipeline and reduce the risk of pipeline
breaks and subsequent sanitary sewer spills.
On March 10, 2020, the City Council adopted Resolution No. 2020-047, approving the plans and
specifications, and authorizing advertisement of the project for construction bids. The project
was advertised using the city’s formal bidding procedures. Construction bids were received on
July 22, 2020. The lowest responsive and responsible bidder was HWK Construction Services
with a bid in an amount of $377,304.
Carlsbad Municipal Code Sections 3.28.080(C) and 3.28.080(I)(6) require the City Council to
award all formally bid contracts when the value exceeds $200,000, which makes the project
subject to this requirement. Staff recommends award of the construction contract to HWK
Construction Services in an amount not to exceed $377,304.
Discussion
Sewer lift stations pump wastewater into force main pipelines and convey it to a higher
elevation, where the pressurized wastewater transitions into a non-pressurized gravity flow
pipeline system. Force mains are inherently exposed to hydraulic surge pressures in typical
operational conditions and can be severely damaged by sudden unpredictable flow changes
due to power outages and mechanical pumping failures. The forces generated by the pressure
surges can cause significant damage to infrastructure resulting in pipeline ruptures and
wastewater spills.
Sept. 15, 2020 Item #2 Page 1 of 7
The Public Works Branch, Utilities Department, completed a surge monitoring analysis with
consultant Blacoh Industries for 10 of the city’s force mains and the Buena Vista Lift Station,
which is jointly owned by the City of Carlsbad and the City of Vista. The monitoring results
identified potential issues at three lift stations and recommended further investigation. The
Poinsettia Lift Station force main was identified as the most critical and a computer surge
model analysis was completed by Northwest Hydraulic Consultants on July 19, 2019. The
analysis detailed recommendations for improvement alternatives, including installation of a
surge tank system at the lift station. The report’s recommended improvements are included in
the project.
The remaining two lift stations are under investigation, in the planning stage of project
development, and are not included in this project.
On July 22, 2020, eight electronically submitted bids were received for construction of the
project. Staff reviewed these bids and determined that HWK Construction Services is the lowest
responsive and responsible bidder. The contract documents for construction contain general
performance standards and reference technical specifications, which if not met, allow the city
to withhold payment. The contract documents also require the contractor to provide the city
with a one-year warranty period for the work performed.
Fiscal Analysis
Sufficient sewer replacement funds are available in the Sewer Line Replacement and
Refurbishment Program, Capital Improvement Program Project No. 5503, to complete the
project. A summary of estimated construction costs and available funds is shown below:
Sewer Line Replacement and Refurbishment Program
Capital Improvement Program Project No. 5503
Project appropriation $7,376,445
Project expenditures/encumbrances $3,837,776
Total available funding $3,538,669
Poinsettia Lift Station Hydraulic Surge Protection
Capital Improvement Program Project No. 5503-14
Construction contract $377,304
Construction contingency (estimated) $75,500
Construction management, inspection, material testing, communications
services and design support (estimated) $90,000
Total estimated construction costs $542,804
Remaining balance $2,995,865
Additional appropriation needed $0
Sept. 15, 2020 Item #2 Page 2 of 7
Next Steps
Once the contract documents are fully executed, staff will issue a purchase order, schedule a
pre-construction meeting with HWK Construction Services and issue a notice to proceed for
construction. The duration of the construction contract is 150 working days, exclusive of rain
days and change orders that may extend the contract duration.
The city will also contract with a communications consultant to provide public outreach services
throughout construction. Upon successful completion, a notice of completion to release bonds
will be recorded.
Environmental Evaluation (CEQA)
The Project is categorically exempt from environmental review per California Environmental
Quality Act Guidelines Section 15303(d) – “new construction of small structures,” which
includes utility extensions.
Public Notification
This item was noticed in accordance with the Ralph M. Brown Act and was available for public
viewing and review at least 72 hours prior to the scheduled meeting date. Prior to start of
construction, the public will be notified of construction activities using media methods such as
signage, email, website and other city communication channels. The construction contractor
will also be required to notify the public of construction activities via door hangers as necessary.
Exhibits
1. Resolution
2. Location map
Sept. 15, 2020 Item #2 Page 3 of 7
RESOLUTION NO. 2020-185
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF CARLSBAD,
CALIFORNIA, ACCEPTING BIDS AND AWARDING A CONTRACT TO HWK
CONSTRUCTION SERVICES FOR CONSTRUCTION OF THE POINSETTIA LIFT
STATION FORCE MAIN HYDRAULIC SURGE PROTECTION, CAPITAL
IMPROVEMENT PROGRAM (CIP) PROJECT NO. 5503-14 (PROJECT), IN AN
AMOUNT NOT TO EXCEED $377,304.
WHEREAS, the City Council of the City of Carlsbad, California, has determined it necessary,
desirable, and in the public interest to construct the Project; and
WHEREAS, on March 10, 2020, the City Council adopted Resolution No. 2020-047 approving
plans and specifications and authorizing advertisement for bids for construction of the Project; and
WHEREAS, eight electronically submitted bids were received on July 22, 2020 for construction
of the Project; and
WHEREAS, HWK Construction Services submitted the lowest responsive and responsible bid to
construct the Project in an amount of $377,304; and
WHEREAS, Carlsbad Municipal Code Sections 3.28.080(C) and 3.28.080(1)(6) require the City
Council to award all formally bid contracts when the value exceeds $200,000; and the Project is subject
to this requirement; and
WHEREAS, the Project is part of the Sewer Line Replacement and Rehabilitation Program, CIP
Project No. 5503; and
WHEREAS, there are sufficient funds appropriated to the Sewer Line Replacement and
Rehabilitation Program, CIP Project No. 5503, to complete construction of the Project; and
WHEREAS, Carlsbad Municipal Code Sections 3.28.040(C)(5) and 3.28.090(B) authorize the city
manager to approve change orders in an amount equal to the contingency set at the time of Project
award; and
Sept. 15, 2020 Item #2 Page 4 of 7
WHEREAS, the City Planner has considered the potential environmental effects of installing a
pneumatic surge tank and related equipment necessary to protect the Poinsettia Lift Station's force
main pipeline from hydraulic surge impacts and determined that the Project is categorically exempt
from the California Environmental Quality Act (CEQA) per State CEQA Guidelines Section 15303(d) and
that no exception to the exemption as set forth in CEQA Guidelines section 15300.2 applies.
NOW, THEREFORE, BE IT RESOLVED by the City Council of the City of Carlsbad, California, as
follows:
1. That the above recitations are true and correct.
2. That the City Planner has determined that the Project, and installation of a pneumatic
surge tank and related equipment necessary to protect the Poinsettia Lift Station's force main pipeline
from hydraulic surge impacts, is categorically exempt from the California Environmental Quality Act
(CEQA) per State CEQA Guidelines Section 15303(d) and that no exception to the exemption as set forth
in CEQA Guidelines section 15300.2 applies.
3. That the lowest responsive and responsible bid of $377,304 submitted by HWK
Construction Services for construction of the Project, is accepted and the mayor is hereby authorized
to execute a contract for the Project.
4. That the city manager or designee is hereby authorized to approve construction change
orders up to the amount of $75,500 for the Project.
5. That the award of this contract is contingent upon HWK Construction Services executing
the required contract and submitting the required bonds and insurance policies, as described in the
contract, within 20 days of adoption of this Resolution. The city manager may grant reasonable
extensions of time to execute the contract.
Sept. 15, 2020 Item #2 Page 5 of 7
PASSED, APPROVED AND ADOPTED at a Regular Meeting of the City Council of the City of
Carlsbad on the 15th day of September, 2020, by the following vote, to wit:
AYES: Hall, Blackburn, Bhat-Patel, Schumacher.
NAYS: None.
ABSENT: None.
MATT HALL, Mayor
a\AcArv)-AAia
BARBARA ENGLESON, City Clerk
(SEAL)
Sept. 15, 2020 Item #2 Page 6 of 7
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Exhibit 2
Sept. 15, 2020 Item #2 Page 7 of 7