CITY OF PACIFICA
COUNCIL AGENDA SUMMARY REPORT
10/9/2023
1 SUBJECT:
Resolution to Approve an Agreement between the City of Pacifica and Casey Construction for Construction of the Anza/Arguello Interim Storm Drain Project in Lower Linda Mar RECOMMENDED ACTION:
Adopt Resolution Approving an Agreement between the City of Pacifica and Casey Construction for Construction of the Anza/Arguello Interim Storm Drain Project, in an Amount Not to Exceed $220,000 with a 20% Contingency, for a Total of $264,000.
STAFF CONTACT:
Lisa Petersen, P.E., Director of Public Works
(650) 738-3770
[email protected]
BACKGROUND/DISCUSSION:
During the FY 2023-24 Capital Improvements Program (CIP) budget approval process, the Council approved funding for the Anza/Arguello Interim Storm Drain Project. This project will address flooding in lower Linda mar.
The lower Linda Mar area on Anza Drive at Arguello Boulevard has a history of flooding during large storm events as well as sewer spills when excess rainwater enters the sewer system filling the sewer to capacity. Public Works staff is in the process of applying for grants to build a more substantial storm water system in the lower Linda Mar area to address stormwater flooding.
Because the cost of this system is in the $6M range, and difficult to find grant funding for, the Council approved a lower cost interim stormwater system to move forward for the area while staff seeks funding for the larger project. This system would act as a redundant system to accommodate overflow from the existing system and would help mitigate flooding at 50-year storm conditions.
In April 2023, the City Manager signed an agreement with Carollo Engineers to begin a storm drain study of the Anza/Arguello area to determine if a lower cost interim storm drain system could be built in the area to help with intermittent flooding during large storm events. The study reviewed four options for the area. These included upsizing the western inlet at the Anza/Arguello intersection, connecting the 36” and 48” storm drainpipes downstream from the intersection, install a new storm drain along Anza and connecting this to the north end inlet and the final alternative was to install a 15” drainpipe along Anza then through new backyard easements at 943/951 Anza Drive to the storm drain system that runs along Hwy 1.
Review of these alternatives showed that connecting the 36” and 48” drainpipes would not provide any meaningful flood mitigation and running a storm line on Anza to the north end inlet was not feasible due to limited slope and pipe cover. Carollo Engineers has determined that increasing the size of the Anza/Arguello inlet in conjunction with installing a new storm pipe along Anza and through the new backyard easements would be the most effective interim fix.
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These residents have agreed to provide the City with the needed storm drain easement. This fix was shown in the study to help mitigate flooding during 50-year storm events. Due to the slopes and utilities in the area, this is the most robust storm system that can be constructed in the location. The system would help mitigate current flooding, however, as previously discussed, any large rain event that exceeds the capacity of a storm system can still cause flooding in an area. Because this area of Anza/Arguello is a low spot in the City, flooding may continue to occur for events that exceed the capacity of any size system the City constructs.
Based on recent potholing of the gas lines, the design has been updated to allow for 2-12” lines to run down Anza to allow the storm drainpipes to avoid the PG&E gas lines that run along the street.
Time is of essence for the project due to the upcoming winter storm season and the City Manager is requesting waiving the bid process due to health and safety issues that come from flooding in the area and entering into an agreement with Casey Construction for a time and materials contract to construct the interim storm drain. City of Pacifica Administrative Policy #76, Purchasing Policy, section 3.6.1, authorizes the City Manager to waive bidding requirements for urgent procurement if he/she determines sufficient justification exists. Casey Construction has completed work in the City in the past and staff has been satisfied with the quality of their work. Carollo Engineering is finalizing a design for the storm drain system and Casey Construction will begin this work as soon as this can be fit into their schedule.
For these reasons, the City Manager is recommending adoption of a resolution approving an Agreement between the City of Pacifica and Casey Construction for construction of the Anza/Arguello Interim Storm Drain Project, in an amount not to exceed $220,000, with a 20% contingency for a total of $264,000; and authorize the City Manager to execute all documents related to the Agreement.
ALTERNATIVE ACTION:
The Council may choose not to approve the Agreement with Casey Construction, via urgent purchase. However, doing so would delay project delivery and increase the chance of flooding in the Anza/Arguello area. The City Manager does not recommend this alternate action.
RELATION TO CITY COUNCIL GOALS AND WORK PLAN:
Approval of the Agreement is consistent with the following Council adopted Goals:
• Improve and steward City Infrastructure, streets, and facilities: Construction of the interim storm drain system will improve the storm drain system in the area, allowing for a redundant system to drain excess stormwater.
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FISCAL IMPACT:
The Project Source and Use of Funds spreadsheet is shown below:
Source of Funds
Anza/Arguello Interim Storm Drain Project $ 350,000
Total Source of Fund $ 350,000
Use of Funds
Project Design (Carollo) $ 63,944
Casey Construction Contract $ 220,000
20% Contingency $ 44,000
Total Use of Funds ($327,944)
Estimated Project Source End Balance $ 22,056
ORIGINATED BY:
Public Works
ATTACHMENT LIST:
Attachment 1: Construction Agreement-Casey Construction (PDF) Pacifica City Council 4
October 09, 2023
RESOLUTION NO. ___
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF PACIFICA APPROVING AN
AGREEMENT BETWEEN THE CITY OF PACIFICA AND CASEY CONSTRUCTION FOR
CONSTRUCTION OF THE ANZA/ARGUELLO INTERIM STORM DRAIN PROJECT, IN AN AMOUNT NOT TO EXCEED $220,000 WITH A 20% CONTINGENCY
__________________________________________________________________________ WHEREAS, during the FY 2023-24 Capital Improvements Program (CIP) budget approval process, the City Council approved funding for the Anza/Arguello Interim Storm Drain Project; and
WHEREAS, the interim storm drain project will help to minimize flooding in the Anza/Arguello area that has historically experienced flooding during large storm events; and
WHEREAS, time is of essence to construct the project before the storm season and the City Manager has requested waiving the bid process to allow for expediated construction; and
WHEREAS, Casey Construction has completed construction work in the City in the past, the City has been satisfied with the quality of the work and the work will be completed on a time and materials basis; and
WHEREAS, City of Pacifica Administrative Policy #76, Purchasing Policy, section 3.6.1, authorizes the City Manager to waive bidding requirements for urgent procurement if he/she determines sufficient justification exists.
NOW, THEREFORE BE IT RESOLVED by the City Council of the City of Pacifica to:
Adopt Resolution Approving an Agreement between the City of Pacifica and Casey Construction for Construction of the Anza/Arguello Interim Storm Drain Project, in an Amount Not to Exceed $220,000, with a 20% Contingency for a Total of $264,000; and authorize the City Manager to execute all documents related to the purchase and authorize the City Manager to execute all documents related to the purchase. • • • • •
PASSED AND ADOPTED at a regular meeting of the City Council of the City of Pacifica, California, held on the 9th day of October 2023, by the following vote:
AYES, Councilmembers:
NOES, Councilmembers:
ABSENT, Councilmembers:
ABSTAIN, Councilmembers:
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_________________________________
Tygarjas Twyrls Bigstyck, Mayor
ATTEST: APPROVED AS TO FORM:
______________________________ _________________________________ Sarah Coffey, City Clerk Michelle Kenyon, City Attorney