SR-08-26-2014-3LCity Council Meeting: August 26, 2014
Agenda Item: 3—L -
To: Mayor and City Council
From: Martin Pastucha, Director of Public Works
Subject: Award Design Contract for the Los Amigos Park Stormwater Harvesting
and Direct Use Demonstration Project
Recommended Action
Staff recommends that the City Council:
1. Authorize the City Manager to negotiate and execute a professional services
agreement with California Watershed Engineering (CWE), a California -based
company, in an amount not to exceed $192,500 (includes a 10 % contingency) to
provide engineering design services, develop construction documents, and
provide engineering support during construction for the Los Amigos Park
Stormwater Harvesting and Direct Use Demonstration Project.
2. Authorize the Director of Public Works to issue any necessary change orders to
complete additional work within budget authority.
Executive Summary
The Los Amigos Park Stormwater Harvesting and Direct Use Demonstration Project
would harvest urban runoff from an existing Los Angeles County storm drain located
within the 5t" Street public right -of -way. The project would pilot a sustainable strategy to
harvest local water resources for non - potable uses such as irrigation and toilet flushing,
in lieu of potable water. Los Amigos Park is a location for stormwater harvesting
considered under the Ocean Park Green Street Project, and is also identified as a
project under the Measure V 5 -year Capital Improvement Program.
Staff recommends California Watershed Engineering (CWE) for the design of the Los
Amigos Park Stormwater Harvesting and Direct Use Demonstration Project in an
amount not to exceed $192,500.
Background
On January 28 2014, Council accepted a grant from the Foundational Actions Funding
Program (FAF) of the Metropolitan Water District of Southern California (MWD) in the
amount of $400,000 for a local runoff harvesting and direct use demonstration project.
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The FAF program distributes funds for technical studies or demonstration projects to
enable effective future planning and potential development of alternative sources, such
as stormwater, to offset potable water requirements. The intent of the grant is to
demonstrate the feasibility of harvesting local water resources such as storm drain flows
to decrease potable water use, reduce polluted urban runoff discharge to the receiving
water body and protect future California's water supplies. It is anticipated that the
project would treat up to 100,000 gallons of stormwater and dry weather runoff annually
for non - potable irrigation and indoor flushing.
Discussion
The Los Amigos Park Stormwater Harvesting and Direct Use Demonstration Project
would tap into an existing storm drain line running along the Santa Monica Alternative
School House (SMASH) athletic field and Los Amigos Park. It will then divert
stormwater and dry weather flows from the storm drain into a cistern for treatment and
deliver treated urban runoff to the park irrigation system and indoor plumbing for toilet
flushing.
The park parcel is owned by the Santa Monica Malibu Unified School District
(SMMUSD) and is used as an athletic field by the school district during school hours,
and managed as a public park by the City for the remainder of the time.
The existing 45 -inch diameter storm drain on 5th Street, adjacent to Los Amigos Park,
collects runoff from a 34 -acre upstream watershed. Given the typical annual rainfall and
impermeability of this upstream watershed, it is anticipated that about 6 million gallons
of runoff will be available to harvest. All excess stormwater beyond the capacity of the
proposed storage cistern would remain in the existing storm drain line, bypass the
proposed diversion structure, and flow as it normally does through the storm drain
system.
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Since the design of this project stores and reuses the treated stormwater, it mitigates
the School District's concern regarding soil contamination which could potentially result
from an earlier infiltration system proposal. The SMMUSD is receptive to this new
conceptual design proposal for urban runoff mitigation on the school lands.
Consultant Selection
On April 11, 2014, the City issued a Request for Proposals (RFP) for engineering
design services, development of construction documents, and engineering support
during construction for the Los Amigos Park Stormwater Harvesting and Direct Use
Demonstration Project. The City received seven proposals on May 19, 2014 and short -
listed ARUP, California Watershed Engineering, Fuscoe Engineering and Tetra Tech for
interviews which were held on June 23, 2014. The proposals were reviewed and short -
listed by Public Works staff based on the quality and experience of the prime consultant
and sub - consultants. Additional criteria included the prime consultant's management
and technical capabilities, regulatory knowledge, community outreach and project
facilitation skills, proposed approach and project work plan, and delivery schedule.
Staff recommends contracting with design consultant California Watershed Engineering
(CWE) based on their experience with similar projects for regional agencies, technical
capabilities, regulatory knowledge, community outreach strategy, project approach,
work plan and delivery schedule. The price proposed by CWE is highly competitive.
CWE provided references for several similar projects including Garvanza Park
Rainwater Capture and Re -use Project and the Rainwater Harvesting and Downspout
Disconnection Program for the City of Los Angeles, Johnny Carson Park Improvements
and Stream Restoration for the City of Burbank, and the City of Torrance Stormwater
Basin & Treatment Wetlands Enhancement.
CWE will provide design services for Los Amigos Park Stormwater Harvesting and
Direct Use Demonstration Project in an amount not to exceed $192,500. The
construction of this project is partially funded by a grant from the Metropolitan Water
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District's Foundational Actions Funding Program, with the remaining costs covered by
Measure V funds.
Proiect Schedule
The design phase of the project is expected to be completed in approximately six to
nine months. Construction duration is anticipated to last for approximately four to six
months. The construction phase of the project is expected to start in the summer of
2015 to coincide with the school summer break and allow construction of onsite
activities to be completed prior to the start of school. Construction of offsite work is
expected to continue past the start of school.
Financial Impacts & Budget Actions
The agreement to be awarded to CWE is for an amount not to exceed $192,500
(includes a 10% contingency) to provide engineering design services, to develop
construction documents and to provide engineering support during construction. Funds
are available in the FY 2014 -15 Capital Improvement Program budget in account
0066021.589000, Los Amigos Park Retrofit (MWD Foundational Actions Fund).
Prepared by: Allan Sheth, Civil Engineering Associate
Approved:
Martin Pastucha
Director of Public Works
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Forwarded to Council:
Rod Gould
City Manager
Reference:
Contract No. 9963
(CCS)