Atherton City Council
July 17, 2024

Upper Atherton Creek Stabilization and Flood Mitigation Project Upper Atherton Creek Stabilization
and Flood Mitigation Project
REQUEST FOR QUALIFICATIONS and PROPOSALS
Professional Consulting Services for
May 2024
May 23, 2024
Town of Atherton
ATTN: Todd Mortensen
80 Fair Oaks Lane
Atherton, CA 94027
Submitted via email to [email protected]
Re: Statement of Qualifications and Proposal to Provide Professional Consulting Services for Upper Atherton Creek Stabilization and Flood Mitigation Project Dear Mr. Mortensen,
Tetra Tech appreciates the opportunity to submit our proposal to provide Professional Consulting Services for the Upper Atherton Creek Stabilization and Flood Management Project in the Town of Atherton (Town). Tetra Tech understands the primary goal of the project is to develop a project plan for stabilization and repair of the creek channel, along with flood mitigation measures to prevent future flooding. The Town is seeking an engineering consulting firm to provide professional services for preparation of the conceptual design through construction documents, including permitting assistance and FEMA coordination.

The efficient execution of this contract requires a talented team that is balanced with technical expertise and effective leadership, which is exactly what Tetra Tech is offering. We believe that we can provide the most costeffective solution for the following reasons:

Robust Project Understanding and Approach. Our team’s extensive experience in designing and implementing creek restoration and flood mitigation projects equips us with a comprehensive understanding of the complexities involved. This allows us to critically assess opportunities and constraints, ensuring a tailored and effective approach to the Upper Atherton Creek project.

Proven Experience. Tetra Tech offers a proven track record in flood mitigation projects, providing the Town with access to a highly qualified team with a deep catalog of successful projects, extensive experience, and specialized knowledge.

Collaborative Approach and Stakeholder Engagement. Our collaborative approach, coupled with a strong history of working with diverse stakeholders (federal, regional, local, and community), will ensure that all parties are engaged throughout the project. This will foster transparency, trust, and community support, which are essential for the project’s success.

Tetra Tech is confident that our response to this solicitation will demonstrate the well-suited capabilities of our team. The proposed leadership and team members are dedicated to supporting the Town. As Principal-inCharge, I certify that I have the authority to negotiate contracts on behalf of Tetra Tech and I am authorized to contractually obligate our organization. Please feel free to contact our proposed Project Manager, Eric Martin, for additional information at (805) 801-6379, or [email protected].

Jason Fussel, PE, PLS, QSD/P, LEED AP, ENV SP
Vice President
TETRA TECH | 1999 Harrison Street, Suite 500 | Oakland, CA | 94612 TOWN OF ATHERTON - 2 - TETRA TECH

1. Statement of Qualifications .................. 3

2. Work Plan Approach and Schedule ...... 4

3. Key Staff and Project Experience........ 10

4. References........................................ 17

5. Schedule and Cost Proposal ............... 18

6. Disclosure and Contract Exceptions ... 19
Appendix
Resumes
Upper Atherton Creek Stabilization and Flood Mitigation Project Upper Atherton Creek Stabilization and Flood Mitigation Project STATEMENT of QUALIFICATIONS

1. TOWN OF ATHERTON - 3 - TETRA TECH
Tetra Tech is a leading provider of consulting, engineering, and technical services worldwide. We are a diverse company, including individuals with expertise in science, research, engineering, construction, and information technology. Our strength is in collectively providing integrated services and delivering the best solutions to meet our clients’ needs. Our track record is proven in these areas by being ranked No. 1 in the U.S. Water sector by Engineering News- Record (ENR) for 20 years in a row, and the No. 3 Design Firm among the “Top 500” consulting firms nationwide.

1. STATEMENT of QUALIFICATIONS
Company Name:

Tetra Tech, Inc.

Personnel:

Tetra Tech currently has
approximately 28,000
employees in more than
550 offices worldwide,
including 200 personnel
within the local area.

Point of Contact:

Eric Martin, PE, PLS
1999 Harrison Street
Suite 500
Oakland, CA 94612
(805) 801-6379
[email protected]
28,000
20 200
employees
offices in California
personnel within
the local area
First and foremost, Tetra Tech is a water firm,
specializing in providing creative and costeffective solutions for water management.

Tetra Tech has more than 20 offices in
California, and we are proud of our longstanding history and successful track record supporting California municipalities with their
water resource and flood risk challenges and
needs.

Our technical expertise, combined with an in-depth practical understanding of the complex challenges facing our clients, allows us to provide full life cycle support. Our experience encompasses all aspects of concept and feasibility-level planning support, engineering, environmental, grant preparation, and flood risk reduction studies and designs. We work closely with our clients to prepare practical and achievable strategies that are scientifically defensible and accurately evaluate the technical, economic, institutional, and regulatory feasibility for meeting goals. Our national network permits us to combine the best of local experience and understanding with the knowledge and experience gained from working with national leaders and practitioners.

Through our extensive flood management work throughout
California, we have the strong and proven approaches needed to successfully engage required stakeholders, solve project challenges, and adhere to state and federal regulations. As shown in Section 3 Key Staff and Project Experience, our team has completed similar work for Santa Clara Valley Water District, Ventura County Public Works Agency (PWA),
and several other agencies within California.

Upper Atherton Creek Stabilization and Flood Mitigation Project

WORK PLAN APPROACH
and SCHEDULE

2. TOWN OF ATHERTON - 4 - TETRA TECH

2. WORK PLAN APPROACH and SCHEDULE
Tetra Tech’s proposal has been assembled to offer an approach that will exceed the Town of Atheron’s goals and objectives while demonstrating our team’s familiarity of the Upper Atherton Creek Stabilization and Flood Mitigation Project and relevant experience with creek restoration and flood management projects of similar scale and scope.

Project Understanding
The Town of Atherton is proposing stabilization
and flood mitigation improvements for Upper
Atherton Creek. The goal is to restore and stabilize
the creek channel to mitigate erosion and prevent
future flooding by performing a full channel
assessment including hydraulic analysis, alternatives
development, conceptual design, and final design
for the Upper Atherton Creek Stabilization and Flood
Mitigation Project. The Town previously planned CIP
improvements in this reach of the channel for a shorter 1,000-LF segment, but due to recent flooding in early
2023, additional channel damage occurred and the
Town, through FEMA, is looking to expand the repairs
and improvements for creek segments II1/JJ1.

Tetra Tech will utilize our direct project experience with FEMA emergency repairs and grant-funded projects
with the Soboba Band of Luiseno Indians Emergency
Repairs and Washoe Tribe Hydrologic & Hydraulic
Assessment to support the Town with this project and
achieve the Town’s goal of improving the damaged
and deteriorated creek segments. Additionally, Tetra
Tech will use our experience with Valley Water’s
Stevens Creek Inspection, Design, and Asset
Management Plan as a guide to assess Upper Atherton
Creek and to develop a holistic conceptual design to
provide creek stabilization and flood mitigation.

Leading the creek modeling and design portion of
the project is Tetra Tech’s Stormwater Manager, Aric
Torreyson. Aric has more than 25 years of experience
with high-profile projects involving water resources
and specifically flood control improvement projects
within developed watersheds. He recently completed
major flood control projects for Valley Water (Upper
Berryessa Creek, Lower Penitencia Creek, and
Stevenson Creek) along with a drainage analysis in
support of the FEMA grant for the Washoe and Soboba
tribes.

Aric will lead the technical management of the project.

He will be responsible for internal team coordination,
management, preparing and reviewing design
deliverables, and directing design support service
disciplines and specialty subcontractors. Aric will
assist in presenting the technical work at meetings and documenting action items and decisions. As his first
item of work, he will prepare a detailed project plan
for the Upper Atherton Creek Stabilization and Flood
Mitigation Project. The Project Plan will consist of the following items:

PROACTIVE AND OPEN COMMUNICATION

ENHANCES COLLABORATION AND EXPEDITES
PROGRESS: Designing to budget will be a major
emphasis for our project manager and team. This
includes both design budget/costs and construction
costs. Our Project Management Team will develop
level-of-effort and cost estimates by task, determine
the labor mix to perform the task, and track costs to
meet design budgets. The main role in monitoring
budgets is a Learned Value Analysis, which compares
the amount of work planned with the actual amount of
work accomplished. We use this tool on all our major
design projects with the analysis done monthly, which
is included in the monthly report.

Controlling scope creep, which can affect both budget
and schedule, will also be a major emphasis of our
project team. Controlling scope creep is almost always
tied to making–and not changing–design decisions
made during the project planning phase, unless there
are overriding reasons. After the preferred project
layout is approved, Aric will implement a formal
procedure to assess suggested design changes that
evaluate all aspects of the change, including the
number of facilities impacted, design and construction
costs, schedule, benefits, options to avoid the change, and the change justification.

TOWN OF ATHERTON - 5 - TETRA TECH
SCHEDULE: Using our understanding of similar
projects and processes this project will go through,
we have provided a major milestone schedule within
our proposal (See Section 5). The order of the tasks
needs to be completed based on predecessor
items to streamline the overall schedule as much as
possible. Our team has experience working together,
so we have established data exchange programs.

The milestone schedule will be turned into a detailed
Microsoft Project schedule containing major tasks and
subtasks and will be presented and discussed with
the Town at the project kick-off meeting. Input will
be incorporated and the final project schedule will
be distributed. This schedule will be used to manage
the project and will be set as the project baseline
schedule. Any deviations from the schedule will be
discussed with the Town and documented. If delays
occur, our project manager will work with the project
team and the Town to identify possible methods of
maintaining the critical path of the project schedule.

QA/QC AND VALUE ENGINEERING: Controlling
construction costs is critical. The ability to control costs starts with controlling the quality of the design. This includes everyone on the team. Quality is achieved
through the efforts of skilled professionals who will
effectively apply their judgment and experience
and follow a deliberate QA/QC program. Tetra
Tech has well-established procedures for quality
management that will be utilized as the project
standard. This includes independent quality reviews
of all deliverables, a technical advisory team of senior professionals, and a QA/QC Manager to make sure
that procedures are followed.

Our QA/QC and Value Engineering Team is a
combination of senior-level professionals with
experience in design, construction, and permitting for
the Town. The team will include Ike Pace, Jung Suh,
and Yen Hsu Chen.

Designing to a budget will be critical for our project
manager and team. This includes both design
budgets/costs and construction costs. The project
team will provide an estimate for the preferred project layout. Our cost estimate will be verified by Tetra
Tech’s cost estimator rather than estimates prepared by design engineers. As a result, your construction cost
estimate will be accurate.

To ensure that the most cost-effective project is
considered, a Value Engineering review is critical
at key stages of the project. The design team will
evaluate the value engineering recommendations,
conduct additional analyses as required, review the
results of the engineering analyses, and incorporate
additional recommendations into the project design.

Upon completion of the Project Plan, kick-off meeting,
and initial coordination with stakeholders, Tetra
Tech will begin data collection, site reconnaissance,
and creek assessment. A data gap analysis will be
performed to identify any additional base information
needed for the project and promptly notify the Town
of any issues. A constraints map with base mapping
will be prepared for the project site and an updated
topographic survey of the creek will be performed
to assist with the hydraulic analysis and preparation
of the concept project design. A detailed hydrologic
and hydraulic study will be performed to verify the
drainage boundaries and baseline creek conditions.

A constraints map will be prepared with utility
mapping and conflicts, topographic mapping,
easement and parcel data, and construction and
maintenance requirements.

Using the concept evaluation and initial stakeholder/
community input, Tetra Tech will prepare a Channel
Assessment Report for review by the Town. The
recommended design will provide a project that
incorporates stakeholder and community feedback,
provides the maximum cost-effective stormwater
treatment, and meets the requirements of the grant
funding. Tetra Tech will utilize our experience with
similar projects such as Stevens Creek.

TOWN OF ATHERTON - 6 - TETRA TECH
Key Issues

WALSH RD

MEADOW LN

RESERVOIR RD

BELBROOK

VALLEY CT
WAY

SARGENT LN

TALLWOOD CT

WALSH CT

BROADACRES RD

WALSH RD

ALAMEDA DE LAS PULGAS

ATHERTON CHANNEL
500’ 0’ 500’ 1000’

BEAR GULCH

RESERVOIR

SHARON HEIGHTS GOLF

AND COUNTRY CLUB

CHANNEL OVERTOPPING
Property damage
A
A

CHANNEL BOTTOM EROSION
Increased sediment transport
B
B

DOWNED TREES
Locally elevated water surface profile
C
C

SIDE SLOPE EROSION
Exposed tree roots
D
D

CHANNEL BOTTOM EROSION
Deep pools attract mosquitoes
E

SIDE SLOPE EROSION
Tree loss & decreased slope stability
F
F
E
Based on our site visits and information contained in the RFQP, we have identified the following key issues that must be addressed for the success of the project. For each of these issues, Tetra Tech will provide solutions and approaches in collaboration with the Town to ensure the proposed improvements are a success. We have tailored our proposal to address the following key issues.

TOWN OF ATHERTON - 7 - TETRA TECH
Scope of Work
Task A Channel Assessment
The objective of this task is to provide an assessment
of the Atherton Creek Channel. Tetra Tech will walk the length of the channel inside the easement and observe
the existing conditions. Tetra Tech shall provide the
formal assessment for Town review, comment, and
approval prior to beginning the conceptual design.

Tetra Tech shall include recommended repairs and a
budgetary estimate for work. The Town will work with
Tetra Tech on developing and mailing a letter notifying property owners of the intended work and scope. The
effort includes addressing one round of review and
comment from the Town on the deliverable.

Tetra Tech will conduct title research to establish the boundary of the channel easement across the affected
parcels. Parcel boundaries will be based on field
monument recovery for the portion of the channel
being improved and with publicly available linework
for areas outside the improvements. A topographic
survey of the channel will be conducted utilizing hybrid survey methods. Aerial LiDAR will be supplemented
by conventional survey methods and will capture
channel topography up to ten feet on either side of
the channel. Within those limits, trees greater than
six inches diameter at breast height (DBH), crossing
utilities, and other improvements or items found will be captured for display in final site basefiles. Data will be acquired and displayed in California State Plane, Zone
3 Coordinates (NAD83). The survey will be elevated to
local municipal benchmarks (NAVD88).

Deliverables
ƒ Atherton Creek Upper Channel Assessment
(including recommended repairs and budgetary
estimate for work)
ƒ Mail letter notifying property owners of the
intended work and scope
Task B Conceptual Design
Upon completion of the Channel Assessment, Tetra
Tech will provide a complete Conceptual Design of
proposed measures to stabilize the creek channel and
minimize the possibility of future flooding for Town
review, comment, and approval prior to beginning
the Conceptual Design. Conceptual Design will be
limited to one plan view and a typical section. The
effort includes addressing one round of review and
comment from the Town on the deliverable.

Deliverables
ƒ Concept Channel Design
Task C Construction
Documents
Based on a Town-approved Conceptual Design and
consulting with other Town consultants, Tetra Tech will provide the following in the 65-, 90-, 100-percent,
and Final Construction Documents Submittal. This task
assumes three rounds of review, one after 65-percent,
one after the 90-percent, and the other after
100-percent. Tetra Tech will also prepare a letter to the Town’s Resident Engineer (RE), including any issues
requiring the RE’s attention and items included in the
Construction Package.

Construction Plan Set (65%, 90%, 100%, and Final)
Tetra Tech will provide design drawings in PDF format
for the following updated sheets: additional plan and
profile sheet and cross section sheet; the title sheet; general notes, abbreviations, and symbols; survey
control plan; plan and profiles; and typical sections,
details, and cross-sections.

Tetra Tech will ensure the design implements features
that provide the intended level of protection consistent with the FEMA Grant requirements.

TOWN OF ATHERTON - 8 - TETRA TECH
Technical Specifications (65%, 90%, 100%, and Final)
Tetra Tech will provide a signature page, table of
contents, order of work, bid item payment clauses,
and bid item specifications in Greenbook format
for the following: rock slope protection; earthwork;
aggregate base; and asphalt concrete. Deliverables
will be provided in Word format.

Engineer’s Estimate (65%, 90%, 100%, Final)
Tetra Tech will provide a Class 3 Engineer’s Estimate
for the project in accordance with the Association for
the Advancement of Cost Engineering International’s
(AACEI) cost estimate classification system.

Deliverables will be provided in PDF format.

Design Documentation Report (65%, 90%, 100%, Final)
Tetra Tech will provide a Design Documentation Report
that will include, but not limited to, the following,
provided in Word format:
ƒ History and/or background relevant to the Project;
ƒ Existing conditions of the facility and/or features
within the project limits;
ƒ Design concept;
ƒ Appropriate design standards, regulations, and
codes utilized;
ƒ Technical discussions and assessments, including :
ƒ Hydraulic Analysis
ƒ Construction impacts, methods, and phasing
considerations,
ƒ Right-of-way (ROW) and/or easement constraints;
ƒ Utility investigations and constraints;
ƒ All current design assumptions, criteria, and
recommendations are based on the limitations and
constraints of the Project.

Information to be provided by client or others to
include in the DDR:
ƒ Agreements, permits, and approvals required;
ƒ Community and/or public outreach requirements;
ƒ Environmental constraints;
ƒ Any additional studies/site investigations required
(only for interim DDR updates);
ƒ Technical discussions and assessments, including:
» Geotechnical/Hydrogeological Analysis
» Structural Analysis
Calculations (65%, 90%, 100%, Final)
Tetra Tech will perform calculations for any proposed
features. Deliverables will be in PDF format.

UTILITY COORDINATION
The Town of Atherton will be the primary point of
contact with all Project stakeholders and regulatory
entities, but Tetra Tech will support the Town’s
negotiations with stakeholders of Project conditions,
constraints, and minimization and mitigation measures
that will need to be abided by for design and
construction of the Project. Tetra Tech will develop
and maintain an updated comprehensive utilities
disposition matrix and composite map that tracks/
displays utility location and information.

Deliverables
ƒ Utility Disposition Matrix
ƒ Construction Documents:
» 65% Construction Documents (Plans,
Specifications, Estimate, DDR, and
Calculations)
» 90% Construction Documents (Plans,
Specifications, Estimate, DDR, and
Calculations)
» 100% Construction Documents (Plans,
Specifications, Estimate, DDR, and
Calculations)
» Final Construction Documents (Plans,
Specifications, Estimate, DDR, and
Calculations)
Task D Geotechnical and
Environmental Engineering
Coordination
Tetra Tech understands that the Town intends to hire
an Environmental Consultant and a Geotechnical
Consultant to assist with the project once the Civil
Engineering Consultant has been selected. If selected,
Tetra Tech will work closely with the project team.

Task E Permitting
Tetra Tech will identify and coordinate all permitting
requirements and fees with the various agencies that
have jurisdiction over the Atherton Creek Channel.

The Town will be responsible for all permitting fees.

Deliverables
ƒ Permitting Timeline
TOWN OF ATHERTON - 9 - TETRA TECH
Task F Meetings
Tetra Tech will maintain communication with the
Town’s Project Manager to keep them apprised of
progress, upcoming deliverables, and any issues that
could potentially impact budget and schedule. Tetra
Tech’s Project Manager will be responsible for all
official communications, including making certain that
deliverables and invoices are submitted in an accurate
and timely manner while the Project is active. This task assumes Tetra Tech will attend a total of 16 bi-weekly
meetings. Meeting summaries (as required) will be
provided. Additionally, the Project Manager and
design team will be available for calls as needed.

Deliverables
ƒ Electronic copies of meeting minutes
Task G FEMA Coordination
Tetra Tech understands that a portion of the funds
for the construction of this project is coming from a
FEMA grant. Tetra Tech will facilitate the coordination with the Town and the Town’s representative any
requirements and formats required by FEMA pertinent
to construction.

Task H Project Plan
Tetra Tech will prepare and submit a Project Plan
for the Town’s approval for each indicated Task.

The Project Plan will outline the key personnel and
procedures to be followed in the conduct of the work,
including a project schedule, a Quality Control Plan,
and an Accident Prevention Plan. The Project Plan
will be presented virtually at the kick-off meeting; the meeting date shall require appropriate coordination
with the Town. The Project Plan will be developed
after discussion with the Town and confirmation of the
proposed project schedule (Section I).

Deliverables
ƒ Project Plan
GENERAL NOTES AND ASSUMPTIONS:

1. All deliverables will be electronic.

2. Scope and fee estimates have been developed
based on the knowledge and information available
at the time of scope development. There is
information that will be provided by the Town as
the effort for the project progresses (e.g., survey
data, finalized hydraulic models, risk analysis).

Required effort may change based on review
of provided information. If further information
becomes available during the scoping or project
period, Tetra Tech reserves the right to request an
update to the scope and fee.

3. Reliance on Provided Information - Tetra Tech
shall be entitled to rely upon any information,
data, and documentation concerning the Project
provided to us by the Town or other parties or that
are generally available, as well as any statements
and representations made by the Town concerning
the Project or the Services. In relying on such
information, Tetra Tech shall have no obligation to
investigate or independently verify the accuracy or
completeness of such information. Only pertinent
information will be provided. All information will
be provided in an organized format.

4. Engineer’s Estimates - Any estimate of
construction cost prepared by Tetra Tech
represents its judgment as a design professional
and is supplied for the general guidance of the
Town. Since Tetra Tech has no control over the
cost of labor and material, or over competitive
bidding or market conditions, Tetra Tech does
not guarantee the accuracy of such estimates as
compared to Contractor bids or actual costs to the
Town.

5. Delays – Tetra Tech shall assist the Town in
applying for permits and approvals required
by law, or more specifically specified in this
Agreement. Tetra Tech shall not be responsible
for delays resulting from customer or third-party
actions or inactions.

6. Permit Effort – Tetra Tech’s work does not include
any effort in preparing and applying for permits.

It is assumed that this effort will be handled by the
Town. Permit fees for all regulatory agencies and
plan checks are not included and are to be paid
by the Town. Tetra Tech cannot guarantee the
approval of permits by the issuing authority.

7. Schedule – This fee estimate assumes that work
will be conducted in fiscal year 2024. Tetra Tech
reserves the right to negotiate fees if work extends
beyond fiscal year 2024.

8. This proposal and fee estimate are good for 60
days from the date shown on this cover letter.

Delays in contracting or project delays may require
additional budget. In addition, it is assumed that
funding is based on a single award, and finding in
phases will incur additional fees associated with
contract reviews and setup, and may be subject to
required additional fees.

Upper Atherton Creek Stabilization and Flood Mitigation Project KEY STAFF and

PROJECT EXPERIENCE

3. TOWN OF ATHERTON - 10 - TETRA TECH

3. KEY STAFF and PROJECT EXPERIENCE
The Tetra Tech team proposed for the Upper Atherton Creek Stabilization and Flood Mitigation Project has been providing similar channel restoration and flood management solutions for various municipalities throughout California for the past 25 years. We offer the Town a team of professionals with the necessary technical skills, proven experience, and staff capacity to successfully deliver this project.

Tetra Tech offers the Town leading industry experts
that will provide the technical and managerial
qualifications, specialized expertise, and professional resources required to ensure project delivery on
schedule and within budget. We have selected some
of our most talented professionals to serve in key
roles who bring unmatched knowledge and an ability
to deliver reliable, cost-effective, and innovative
solutions.

The organization chart below presents the key
personnel and the responsibilities of each,
followed by a biographical sketch that introduces
the background and unique skill set of each of the
talented professionals the Tetra Tech team commits
to the Upper Atherton Creek Stabilization and Flood
Mitigation Project. Brief resumes are included in the
Appendix.

Eric Martin, PE, PLS Ike Pace, PE Jason Fussel, PE, PLS,

QSD/P, LEED AP, ENV SP

PRINCIPAL-IN-CHARGE PROJECT MANAGER QA/QC MANAGER
Organizational Chart

TOWN OF ATHERTON
Orlando Lopes, PE
Steven Parker

HYDROLOGY/

HYDRAULICS CHANNEL DESIGN
Aric Torreyson, PE, ENV SP
Jung Suh, PE
Eric Olea, EIT
Kyle Cross, PE
David Montalvo, EIT
Dan Helt, PE, PLS
Mark Lawler, LSIT

DESIGN TEAM

CIVIL ENGINEERING SURVEY
TOWN OF ATHERTON - 11 - TETRA TECH
Jason Fussel, PE, PLS, QSD/P, LEED AP, ENV SP
Principal-In-Charge
As Principal-in-Charge, Jason will be ultimately responsible for assuring the Town’s satisfaction with Tetra Tech’s work. He will monitor delivery of the project, review for quality, precedent, and risk, provide direction of the design effort, staffing to meet the Town’s needs, and dedicating the resources necessary to see that the design objectives, schedule, and budget goals are met. In addition, he will assist our Project Manager with client and agency coordination. Jason’s civil engineering experience totals more than two decades, focused on water quality projects throughout California. He has been serving as the design lead in charge of coordinating all engineering disciplines and landscape architecture for large regional water capture projects totaling more than $250 million in construction cost throughout Los Angeles County. This includes all facets of design, from storm drain to surface and park restoration.

Eric Martin, PE, PLS
Project Manager
To best serve the Town on this project, we have assigned Eric Martin to lead our technical team. Eric will provide the overall project direction, coordination, technical oversight, and act as the single point of contact for the Town. Eric works out of Tetra Tech’s Oakland office and brings more than 10 years of experience providing civil engineering design for municipal, federal, and private sector projects including preparation of concept level and detailed construction documents as well as providing hydrologic analysis, hydraulic design, and Water Quality Management Plans for Low Impact Development projects.

These include site plans, street and storm drain improvements, grading plans, and utility plans for local and regional stormwater capture and treatment projects, as well as complete street projects. His experience includes hazardous waste containment and treatment projects and site development projects at sites across the U.S. and at Air Force facilities requiring hazardous waste containment and treatment infrastructure upgrades at fueling facilities. He also has experience developing maps and plans for boundary and topographic surveys, as-built surveys, for a wide variety of projects using traditional survey methods, mobile and static scanning technology, and UAV mounted LiDAR.

Ike Pace, PE, CCP
QA/QC Manager
As the QA/QC Lead, Ike is tasked with ensuring the complete satisfaction of the Town with the work efforts of the team and the intent of the proposed project. He will provide the overall project direction, coordination, technical oversight. Ike will lead project coordination between members of the project team to ensure that the project requirements are clearly identified, understood, and met.

Ike has 26 years of experience providing technical support to federal, state, municipal, and private clients in the areas of water resources management, planning and designing of levees and dams, river restoration, fish passage, flood control, flood mitigation analysis, and cost engineering. He has provided structural engineering support for numerous flood control elements including retaining walls, floodwalls, rectangular channels, trapezoidal channels, and side drain inlets. He has also been highly involved with the structural Design Criteria Review for the Periodic Inspection of Federal levees, which allows him to stay current with the latest USACE EMs, ERs, and ETLs. Ike is currently managing a dam spillway enlargement in Porterville California for the USACE and several levee design and design-build projects in Southern California for Ventura County and Orange County.

MANAGEMENT TEAM
TOWN OF ATHERTON - 12 - TETRA TECH

DESIGN TEAM
Aric Torreyson, PE, ENV SP
Channel Design Lead
Aric has more than 20 years of diverse engineering
experience in public works construction,
environmental engineering, and infrastructure
assessment. He has completed numerous multidiscipline public works and recreational improvement projects, smoothly integrating many different
disciplines to achieve project goals. Aric has extensive and relevant experience in stormwater design
and development of Best Management Practices
and has successfully implemented sustainable
design elements, including complete streets, water
harvesting, landscaping, and streetscaping. He has
specific experience in projects throughout Southern
California requiring public engagement for complete
street reconstruction, emergency roadway/trail
repairs, and shoreline protection tieback walls with
pedestrian access. His significant involvement in LID
and stormwater pollution prevention and reduction
projects in Southern California has provided a deep
understanding of permitting and regulatory issues in
this region. He has obtained permits from Caltrans,
UPRR, and BNSF, and has experience with right-of-way
acquisition and managing environmental permitting.

Orlando Lopes, PE
Hydrology & Hydraulics Lead
Orlando specializing in the management and
improvement of flood control systems and levee
infrastructure. With expertise in GIS mapping,
hydrology, hydraulics, and project management,
Orlando has led numerous high-profile engineering
projects throughout Southern California and Arizona.

His work includes conducting comprehensive
condition assessments, developing and designing
flood protection solutions, and steering multistakeholder collaborations to ensure community safety and compliance with regulatory standards.

Steven Parker
Hydrology & Hydraulics
Steven has experience in environmental planning
and hydrologic and hydraulic engineering as a GIS
specialist and Hydrology/Hydraulics Analyst. He is an
experienced geographer and GIS professional, acting
as a project manager and analyst in environmental
planning and hydrologic and hydraulic engineering.

He has a strong background in remote sensing/image
analysis, GIS, fluvial geomorphology, hydraulics,
and hydrology. His experience includes field survey
data collection and application and model expertise
including the latest versions of HEC-RAS, as well as
GeoRAS, FLO-2D, HEC-HMS, and GeoHMS. He
acts as a mentor in GIS and ArcGIS for other staff and
works well with design teams working in AutoCAD
or Microstation, or with graphics teams working
in Illustrator or Photoshop. His diverse experience
and geography background bring a holistic view to
projects he manages or participates in.

Jung Suh, PE
Channel Design
Jung is a civil engineer with 22 years of experience in the preparation of construction documents for various
federal and local clients. The work includes the field
of surface water hydrology and hydraulic analysis of
natural rivers and streams, flood control channels and
levees, stormwater design, and alluvial fan flood flows.

Jung has design experience in open-channel flow,
closed-channel conduit, debris/detention basins,
and local storm drains and catch basins. His design
experience also includes computer-aided design using
AutoCAD and Civil 3D software, Bentley OpenRoads,
ProjectWise, MicroStation, and InRoads systems, and
design technical specifications.

Eric Olea, EIT
Channel Design
Eric has four years of experience as a water resources
engineer. He began his career at the City of Santa Ana
Water Resources Department, working on several
city improvement projects. He has been involved
in several water projects and has led inspections of
several County and Corps flood control facilities. He
is experienced in various civil drawing software and
compiling cost reports.

Kyle Cross, PE
Civil Engineering
Kyle brings more than 13 years of experience in
the design of municipal infrastructure. His design
experience includes water distribution systems,
wastewater collection systems, site grading, and
stormwater analysis. He has the knowledge to
utilize the latest in AutoCAD Civil 3D software to
generate clear and accurate construction plans. Kyle’s
experience in survey and construction observation has
provided him a strong understanding of the transition
from design to construction.

TOWN OF ATHERTON - 13 - TETRA TECH
David Montalvo, EIT
Civil Engineering
David has experience in civil engineering design
for municipal and private sector project including
preparation of site plans, street improvements, and
utility plans. David is also experienced in performing
and developing maps and plans for topographic
surveys and staking for various projects.

Dan Helt, PE, PLS
Survey
Dan is experienced in both civil engineering and
land surveying aspects of construction and land
development projects. He has designed and prepared
both small and large federal, municipal, commercial,
and residential grading and drainage plans, as
well as utility plans and project associated public
improvement plans. Dan has prepared a variety of
hydrology and hydraulic documents for review of
analysis and compliance with codes and standards. He
has prepared and reviewed specifications, calculations
and other basis of design documents. Dan’s surveying
experience includes performing field boundary and
topographic surveys, as well as construction staking,
certification and monitoring, and ALTA/ACSM surveys.

He has considerable experience researching boundary
and chain of title information, and preparing legal
descriptions.

Mark Lawler, LSIT
Survey
Mark is experienced in a variety of field survey and
GIS applications. He has participated in all aspects
of control, construction, boundary, topographic
and aerial control surveys including terrestrial LiDAR
acquisition. He has ample experience with field survey
preparation, logistics and execution and is responsible for geospatial data acquisition processing and quality
control, project research, crew deployment and
support as well as task oversight and tracking. He has
experience working on projects for municipal, state
and federal agencies in diverse areas such as real
estate and cadastral, flood plain management, public
health and safety, and resource management.

TOWN OF ATHERTON - 14 - TETRA TECH
Tetra Tech helped Valley Water with strategies to comprehensively manage and rehabilitate 23-mile Stevens Creek that extends from the Santa Cruz Mountains to San Francisco Bay. This work included updates on the Asset Management Plan (AMP) to address systemic deficiencies through a holistic approach, integrating geomorphic and hydraulic assessments. Key components included:
ƒ Condition Assessment and Geomorphic Study: Targeted assessments to understand erosion patterns and hydraulic capacity, identifying areas requiring urgent stabilization and enhancement.
ƒ Feasible Concept Designs: Development of practical and effective design solutions tailored to the unique conditions of Stevens Creek, including rock riffle structures to mitigate bed erosion and strategically placed levees or floodwalls to enhance flood protection.
ƒ Updated AMP with Holistic Management Strategies: The AMP revision incorporated geomorphic insights to formulate sustainable recommendations for capital improvement projects and management strategies, prioritizing ecological compatibility, and flood resilience.

Key Challenges: (1) Stevens Creek’s varied geomorphic characteristics required sophisticated assessment techniques to understand and address erosion and sediment transport; (2) densely populated urban areas complicated construction activities and required careful coordination to minimize disruption to local communities; and (3) addressing creek’s hydraulic inadequacies to handle 100-year flood events without extensive modification to infrastructure. Several discussions were held with Valley Water groups to ensure solutions were thoughtful, fair, and realistic, which allowed for important and inclusive discussion about how the creek should be repaired, improved, and maintained.

STEVENS CREEK INSPECTION, DESIGN, AND ASSET MANAGEMENT PLAN Santa Clara County, CA
Tetra Tech supported the preparation of the PI deficiencies correction spreadsheet and supporting analysis and documentation to successfully reinstate SCR-1 back into the USACE PL 84-99 program. We developed a draft Interim Risk Reduction Measures (IRRMs) Plan to include interim actions to reduce flood risks from the SCR1 Levee System while long-term solutions are developed and implemented. IRRMs are being developed based on guidance in the Engineering and Construction Bulletin No. 2012-1 and will become a critical part of flood risk management and prevention of loss of life.

Key Challenges: High potential scour depths which threaten to undermine the levee. Evaluated the use of soil cement to provide slope armor.

SANTA CLARA RIVER FINAL DESIGN AND FEMA CERTIFICATION
Ventura County, CA
CLIENT: Ventura County Public Works Agency (PWA)
CONTACT: Kirk Norman, (805) 654-2017, [email protected] CLIENT: Valley Water
CONTACT: Elizabeth Mercado, (408) 858-2332, [email protected]

RELEVANT PROJECT EXPERIENCE
TOWN OF ATHERTON - 15 - TETRA TECH
Tetra Tech provided support to the Soboba Band of Luiseno Indians to develop a master drainage plan and detailed floodplain study for Poppet Creek, the main watercourse through the reservation. We provided application support for grants including 406 FEMA Grant Program, Hazard Mitigation Grant Program, and the 404/Pre-Disaster Mitigation Grant Program. We also provided investigations and evaluations of the drainage problems at the Soboba reservation area, allowing for early implementation of portions of the Master Plan.

Key Challenges: Emergency engineering support to re-open, repair, and protect infrastructure from flooding. Expedited design and construction documents to fast track the repairs and protect vital infrastructure on the Reservation.

SOBOBA FLOOD HAZARD MITIGATION, GRANT SUPPORT,
MASTER DRAINAGE PLAN, AND EMERGENCY PS&E, San Jacinto, CA CLIENT: Soboba Band of Luiseno Indians
CONTACT: Ken McLaughlin, (951) 487-7445 x4126, [email protected] Tetra Tech performed a hydraulic design refinement, including baseline and proposed sediment transport analysis, of the preliminary design which allowed for major plan modifications to streamline the transitions at the bridge crossings, improve channel junctions, and revise the bottom widths to fit the channel into the right-of-way. Tetra Tech prepared a system-wide CLOMR for Lower and Upper Berryessa Creek, Lower Penitencia Creek, and Coyote Creek into the San Francisco Bay.

Key Challenges: Very confined schedule. Through a feasibility study, additional right-of-way for construction was recommended.

UPPER BERRYESSA CREEK FINAL DESIGN, San Jose, CA
CLIENT: Valley Water
CONTACT: Judy Nam, (408) 728-0451, [email protected] Tetra Tech designed one-mile of flood control improvements, including two pump station modifications, roller and “flip-up” gate closure structures, levee and sheet pile design, hydraulic engineering, utility relocations, and environmental coordination. The project added channel capacity using levee improvements of sheet pile floodwalls, closure structures, and earthen embankment fills.

Key Challenges: Channel was hydraulically constricted and required floodwall improvements to provide required FEMA freeboard on top of earthen levee.

Determined two channel bridge crossing improvements to reduce large hydraulic losses imposed by the bridges.

LOWER PENITENCIA CREEK FLOOD CONTROL, Milpitas, CA
CLIENT: Valley Water
CONTACT: Bill Sanchez, (408) 630-2974, [email protected] TOWN OF ATHERTON - 16 - TETRA TECH
Tetra Tech was contracted by the Washoe Tribe of Nevada and California to undertake a detailed hydrologic and hydraulic assessment of their properties along the East Fork of the Carson River and an adjoining tributary. The primary goal was to assess flood risk hazards, identify gaps in existing FEMA and local data, and propose viable flood design solutions. The project involved:
ƒ Comprehensive reviews of FEMA and local hydrologic and hydraulic data; ƒ On-site assessments to directly observe and evaluate flood risks and drainage issues; and
ƒ Development of a memo outlining findings and recommending actions including updating flood inundation mapping and designing solutions for tributary flooding.

The project culminated in a memo outlining findings and recommending actions such as updating flood inundation mapping and designing solutions for tributary flooding, with potential solutions including channel widening, bridge expansion, and possibly constructing levees.

Key Challenges: (1) Synthesizing historical data with new field observations to create an accurate risk profile; (2) managing flood risks in a geographically challenging area with significant historical and cultural implications; and (3) ensuring solutions respected the tribal community’s needs and heritage.

WASHOE TRIBE HYDROLOGIC AND HYDRAULIC ASSESSMENT
Gardenville, NV
CLIENT: Washoe Tribe of Nevada & California
CONTACT: James Gatzke, (775) 265-8680 x11010, [email protected] Tetra Tech worked with the Town of Atherton to evaluate and prepare 30% construction documents for a Caltrans funded Water Capture Project to reduce localized flooding and improve water quality. Tetra Tech provided a Project Engineering Design Report that included all necessary field survey, boundary survey, site investigation, hydrology and hydraulic analysis, water quality data and analyses required to design a cost-effective regional stormwater capture treatment system. The analysis balanced the inflow rate, storage volume, and outflow methodologies and relates the associated volume and pollutant reduction to inform the design sizing decision. ENGEO conducted a geotechnical investigation for the improvement project.

The intent of the project was to store and recharge stormwater from the Atherton Canal into soil materials at depth underneath the existing park and reduce surface flows from the upper portions of the watershed.

ATHERTON WATER CAPTURE
Atherton, CA
CLIENT: Town of Atherton
CONTACT: Robert Ovadia, (650) 752-0541, [email protected] Upper Atherton Creek Stabilization and Flood Mitigation Project

REFERENCES

4. TOWN OF ATHERTON - 17 - TETRA TECH

4. REFERENCES
Project Name Client Reference Description of Work
Stevens Creek
Inspection,
Design, and Asset
Management Plan
Valley Water
Elizabeth Mercado
(408) 858-2332
[email protected]
Tetra Tech assisted Valley Water with strategies to
comprehensively manage and rehabilitate 23-mile
Stevens Creek that extends from the Santa Cruz Mountains to San Francisco Bay, including updates on the Asset
Management Plan to address systemic deficiencies
through a holistic approach, integrating geomorphic and hydraulic assessments.

Upper Berryessa
Creek Final
Design
Valley Water
Judy Nam
(408) 728-0451
[email protected]
Tetra Tech performed a hydraulic design refinement,
including baseline and proposed sediment transport
analysis, of the preliminary design which allowed for major plan modifications to streamline the transitions at the bridge crossings, improve channel junctions, and revise the bottom widths to fit the channel into the right-of-way.

Tetra Tech prepared a system-wide CLOMR for Lower and
Upper Berryessa Creek, Lower Penitencia Creek, and
Coyote Creek into the San Francisco Bay.

Santa Clara River
Final Design
and FEMA
Certification
Ventura County Public
Works Agency
Kirk Norman
(805) 654-2017
[email protected]
Tetra Tech supported the preparation of the PI deficiencies correction spreadsheet and supporting analysis and
documentation to successfully reinstate SCR-1 back into the USACE PL 84-99 program. We developed a draft
Interim Risk Reduction Measures Plan to include interim actions to reduce flood risks from the SCR-1 Levee
System while long-term solutions are developed and
implemented.

The Tetra Tech team’s success has been built on local
knowledge, technical expertise, quality design,
fiduciary duty, and development of practical solutions
that meet industry standards for sound engineering
practices. The representative project experience
and descriptions provided in our response serve as
a sampling of projects that validate the depth of our
team’s local expertise in creek restoration and flood
risk management projects.

Tetra Tech is especially proud of our high level of repeat clients, which we attribute to our dedication and
commitment to providing quality engineering services,
as well as client satisfaction. Of particular note is our team’s unmatched depth of experience working with
local municipalities and regulatory agencies. Design
of such projects requires a unique set of skills that can only be derived from experience. The staff committed
to working with the Town have been hand-picked
based on their experience working on the projects
included in this section. Additional experienced
resources will also support this project on an asneeded basis to ensure we meet or exceed the Town’s expectations for the project schedule.

We invite you to reach out to the client references
below to inquire about their experience working with
Tetra Tech.

Upper Atherton Creek Stabilization and Flood Mitigation Project SCHEDULE and COST PROPOSAL

5. TOWN OF ATHERTON - 18 - TETRA TECH
Price Summary / Totals
Task Pricing Totals 428,490
Bill Rate > 375.00 375.00 375.00 210.00 200.00 145.00 275.00 225.00 200.00 165.00 270.00 175.00 115.00 105.00 265.00 340.00 140.00 130.00 Specify Add'l Fees on Setup 0 Technology Use Fee
Proj Area > QA/QC H&H Civil Civil Civil H&H H&H H&H H&H Survey Survey Survey Survey Survey Survey Admin Admin 428,490 Submitted to: Town of Atherton
Unit Rate > $0.80
Contract Type: T&M
Unit > mile
Charged to > M&E
Project Phases / Tasks From Thru Months 1,738 9 37 124 44 6 16 258 76 372 472 8 20 30 100 30 116 4 16 Quantities > 1,500 0.00% 386,480 37,290 - 1,200 3,520 428,490 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 H Project Plan 06/05/24 06/28/24 0.7 2 15 16 - 4 1 - - 10 1 - - - - - - - - - - - - 4,835 - - - - 4,835 H.01 Prepare Project Plan 12 1 2 1 8 3,535 3,535
H.02 Review Project Plan 4 2 2 1,300 1,300
F Meetings and Coordination 06/05/24 12/31/24 6.7 15 135 52 - 8 - - - 32 - - - - - - - - - - 4 8 - 13,400 - - - - 13,400 F.01 General Project Management 28 61 4 8 6,000 6,000
F.02 Biweekly Progress Meetings 24 8 61 7,400 7,400
A Atherton Creek Upper Channel Assessment 06/12/24 07/26/24 1.4 4 28 606 4 32 11 3 - - 76 12 60 100 8 20 30 100 30 116 - 4 1,500 136,555 37,290 - 1,200 2,970 178,015 A.01 Site Walk 24 21 12 7,800 2,750 10,550
A.02 Condition Assessment Memo 95 1 4 8 2 02 20 4 0 21,395 21,395 A.03 Hydrologic/ Hydraulic Modeling 120 4 04 16 60 25,600 25,600 A.04 Assessment Recommendations and Estimate 47 1 4 2 4 12 24 10,895 10,895 A.05 Mailing Letter 11 1 4 2 4 2,815 220 3,035
A.06 Base Mapping 309 - - - 5 - - - - - 8 20 - 30 100 30 116 - - 1,500 68,050 37,290 - 1,200 - 106,540 Field 156 2 8 30 116 1,500 49,210 3,850 1,200 54,260
LiDAR 3 1 2 560 16,940 17,500
Office 150 2 8 10 30 100 18,280 16,500 34,780
B Conceptual Channel Design and Flood Mitigation Measures 07/15/24 08/09/24 0.8 2 16 124 4 12 - - - - 24 - 24 60 - - - - - - - - - 27,300 - - - - 27,300 B.01 10% Conceptual Design 124 4 12 24 24 60 27,300 27,300 D Coordination with Town Consultants 07/15/24 12/13/24 4.9 11 97 108 - 12 14 2 - - 24 - 56 - - - - - - - - - - 25,990 - - - - 25,990 D.01 General Coordination 78 2 8 12 16 40 18,670 18,670 D.02 Addressing Town & Consultant comments (For Conceptual Design) 30 4 2 8 61 7,320 7,320 C Construction Documents 08/12/24 12/13/24 4.0 9 79 765 28 40 10 3 6 16 64 64 220 312 - - - - - - - 2 - 159,985 - - - - 159,985 C.01 65% Plans, Specifications & Estimates 287 1 8 16 4 2 8 24 24 80 120 59,575 59,575 C.02 90% Plans, Specifications & Estimates 243 1 8 12 4 2 20 16 80 100 50,715 50,715 C.03 100% Plans, Specifications & Estimates 159 1 8 8 2 2 8 1 2 16 40 60 2 33,415 33,415 C.04 Final Plans, Specifications & Estimates 76 4 4 8 8 20 32 16,280 16,280 G FEMA Coordination 08/09/24 12/31/24 4.6 11 92 44 - 8 6 - - 16 - - 12 - - - - - - - - 2 - 11,320 - - - 550 11,870 G.01 FEMA (1) Meeting and Coordination 18 4 4 8 2 4,800 4,800 G.02 FEMA Requirements and Formatting 26 4 2 8 21 6,520 550 ,070 7 E Permitting 07/15/24 12/31/24 5.5 13 108 23 1 8 2 - - 12 - - - - - - - - - - - - - 7,095 - - - - 7,095 E.01 Permitting Timeline 23 1 8 2 21 7,095 7,095
Totals 06/05/24 12/31/24 6.7 1,738 9 37 1 24 44 6 16 258 76 3 72 472 8 20 30 100 30 116 4 16 Quantities > 1,500 0.00% 386,480 37,290 - 1,200 3,520 428,490 Task Pricing
Schedule Totals Work Days Off Work Days
Total
Labor Hrs Subs Travel Mat'ls & Equip ODCs
Labor
Rate Esc. Labor
Items > Fleet Vehicles
Principal Engineer (Aric Torreyson)Project Manager 1 (Eric Martin)Project Engineer 2 (Kyle Cross)Engineer 1 (David Montalvo)Sr Engineer 1 (Orlando Lopes)Sr Planner / Cost Estimator (Steve Parker)Engineer 3 (Eric Olea)Engineer 2 (Kim Nguyen)Principal Surveyor (Dan Helt)Survey Manager (Mark Lawler)Surveying Specialist (Zeph Seher)Survey Technician (Cyrus Khambatta)2 Person Survey Crew (Non-Prevailing)2 Person Survey Crew (Prevailing)Sr Project Administrator (Lee Houston)Sr Project Administrator (Karen Grubb) Total Price
Unit Rate Qty's
Pricing by Resource
Principal Engineer (Jason Fussel)Principal Engineer (Ike Pace) 18 Resource
Atherton Channel Repair
Price Proposal Revision Date:

May 23, 2024
Labor Plan

5. SCHEDULE AND COST PROPOSAL
Included below is our proposed schedule and cost estimate for each of the tasks outlined in the scope of work, including personnel, job title, hourly rates, and estimated time for each task and subtask. Our hourly rate includes labor, reporting, travel, technical supervision, equipment, taxes, insurance, and all other incidental charges, as requested by the RFQP.

Upper Atherton Creek Stabilization and Flood Mitigation Project DISCLOSURE and

CONTRACT EXCEPTIONS

6. TOWN OF ATHERTON - 19 - TETRA TECH

6. DISCLOSURE
Tetra Tech is a leading, global provider of consulting
and engineering services, with 28,000 employees
supporting global commercial and government
clients focused on water, environment, sustainable
infrastructure, renewable energy, and international
development. As such, we have a robust internal
conflict of interest process to serve our clients without adverse conflict. Tetra Tech does not foresee any
potential conflicts of interest in working for the Town of Atherton.

Tetra Tech has reviewed and understands the
proposed terms and conditions described in the
Town’s Standard Agreement for Services and believes
the agreement is generally sufficient to indicate and
convey understanding of all terms and conditions for
the performance of the work for which this proposal is
submitted.

Tetra Tech respectfully requests consideration of the
following exceptions to the Agreement, and we would
welcome the opportunity to discuss these items should
Tetra Tech be the selected consultant.

We are confident that we can arrive at mutually
agreeable contract terms.

1. Section 15, INDEMNITY AND LITIGATION COSTS.:

Tetra Tech requests the following revisions:
“Consultant shall protect, hold free and harmless,
defend and indemnify the City, its consultants, and
each of their officers, and employees and agents,
from any and all liability, penalties, costs, losses,
damages, expenses, causes of action, claims or
judgments, including reasonable attorney’s fees
and expenses of litigation arising out of, pertaining
to, or relating to the extent caused by the negligent
acts, errors, omissions, negligence, recklessness, or
willful misconduct of the Consultant, its employees
or anyone else employed by the Consultant in the
performance of professional design services under
this agreement, to the extent of the Consultant’s
proportionate percentage of fault.”

2. Section 16, CONSULTANT TO PROVIDE INSURANCE.
a. Subsection 16.1: Tetra Tech request our standard
limits for insurance of $1M/$2M for CGL, $1M for
Auto, and $1M/$1M for PL.
b. Subsection 16.5.c: Tetra Tech requests deletion
of the following sentence: “The Consultant must
agree to provide complete, certified copies of all
required insurance policies if requested by the
City.”
c. Subsection F: Tetra Tech requests deletion of this
subsection: “The Consultant must agree to provide
complete, certified copies of all required insurance
policies if requested by the City.”

3. New Section, CONSEQUENTIAL DAMAGES:

Tetra Tech requests the addition of the following
as a new provision: “Notwithstanding any other
provision of this Agreement, and to the fullest extent
permitted by law, neither the City nor Consultant, their respective officers, directors, partners, employees,
contractors, or subconsultants shall be liable to the
other or shall make any claim for any incidental,
indirect, or consequential damages arising out of
or connected in any way to the project or to this
Agreement. This mutual waiver of consequential
damages shall include, but is not limited to, loss of
use, loss of profit, loss of business, loss of income, loss of reputation, or any other consequential damages
that either party may have incurred from any cause
of action including negligence, strict liability, breach of contract, and breach of strict or implied warranty.

Both the City and Consultant shall require similar
waivers of consequential damages protecting all the
entities or persons named herein in all contracts and
subcontracts with others involved in this project or
with this Agreement.”

4. New Section, LIMITATION OF LIABILITY: Tetra
Tech requests the addition of the following as
a new provision: “Notwithstanding any other
provision of this Agreement, and to the fullest extent

CONTRACT EXCEPTIONS
TOWN OF ATHERTON - 20 - TETRA TECH
permitted by law, neither the City nor Consultant,
their respective officers, directors, partners,
employees, contractors, or subconsultants shall
be liable to the other or shall make any claim
for any incidental, indirect, or consequential
damages arising out of or connected in any way
to the project or to this Agreement. This mutual
waiver of consequential damages shall include,
but is not limited to, loss of use, loss of profit, loss of business, loss of income, loss of reputation,
or any other consequential damages that either
party may have incurred from any cause of action
including negligence, strict liability, breach of
contract, and breach of strict or implied warranty.

Both the City and Consultant shall require similar
waivers of consequential damages protecting
all the entities or persons named herein in all
contracts and subcontracts with others involved
in this project or with this Agreement.”

5. New Section, DISPUTE RESOLUTION: Tetra
Tech requests the addition of the following as a
new provision: “The City and Consultant agree
that they shall diligently pursue resolution of all
disagreements within 45 days of either party’s
written notice using a mutually acceptable form
of mediated dispute resolution prior to exercising
their rights under law. Consultant shall continue to
perform services for the Project and the City shall
pay for such services during the dispute resolution
process unless the City issues a written notice
to suspend work. Causes of action between the
parties to this Agreement shall be deemed to
have accrued and the applicable statutes of
repose and/or limitation shall commence not
later than the date of substantial completion.”
Upper Atherton Creek Stabilization and Flood Mitigation Project

RESUMES
Appendix.

TOWN OF ATHERTON TETRA TECH
Jason Fussel’s civil engineering experience totals more than two decades with a focus on water quality projects. His experience includes work on both public and private sector jobs of varying size and construction material types including the design of water distribution systems, street and storm drain improvements and grading activities varying from mass grading to final precise grading plans, and sewer transmission systems. Mr.

Fussel’s professional strengths and key areas of expertise include project management, QA/QC, peer review, cost estimating, stormwater analysis and studies, design, preparation of specifications, bid documents and cost estimates, and construction support services.

Experience
Cartan Field Water Capture Project, Town of Atherton, CA. PrincipalIn-Charge. Mr. Fussel was responsible for overseeing survey services and the preparation of conceptual design, plans, specifications, and estimates (PS&E) through construction management for a stormwater capture facility that diverts water from a major flood control storm drain (Atherton Channel). Survey services for the project involved production of a Record of Survey under direction of the Licensed Land Surveyor at the request of the Town of Atherton. Additional scope included conceptual design and 30% construction documents including plans, specifications, and estimate (PS&E) for the stormwater capture facility. The project goal was to convey stormwater to an underground infiltration/detention system, and evaluate the potential end points of reuse, irrigation, infiltration, and/ or filtration. The project involves initial engineering and geotechnical assessments, detailed design, environmental compliance, permitting, construction of a diversion structure and piping, construction of a pretreatment facility, excavation and construction of a high void underground storage/infiltration chamber, disposal of excavated soil, and reconstruction of disturbed portions of the site. The project is part of the Town’s goal to implement green infrastructure planning, stormwater resource planning, mercury/PCBs load reduction, and trash load reductions.

Aliso Creek – Limekiln Creek Restoration Project, City of Los Angeles Bureau of Engineering, Los Angeles, CA. Program Manager. Mr. Fussel was responsible for overseeing pre-design and design services. The project is located at the confluence of the concrete lined Aliso and Limekiln Creek flood channels, which merge together in the southern portion of the project site. The project improvements involved constructing several stormwater Best Management Practices (BMPs) intended to treat on-site and off-site runoff and reduce contamination in Aliso Creek, Limekiln Creek, and the Los Angeles River. The BMPs included low flow channel diversions, stormwater pump stations, stormwater pre-screening devices, bioswales, vegetated detention/retention basin, the restoration of upland, riparian habitat, and BMP educational signage. The goal of the project is to significantly reduce the pollutant loads, as well as transform a specifically

PRINCIPAL-IN-CHARGE
Jason Fussel, PE, PLS, LEED AP,

QSD/P, ENV SP

EDUCATION
BS, Civil Engineering,
California Polytechnic State
University, San Luis Obispo,
2003

REGISTRATIONS/

CERTIFICATIONS
Professional Engineer,
California No. 70879
Professional Land Surveyor,
California No. 9006
Qualified SWPPP Developer
(QSD) and Qualified SWPPP
Practitioner (QSP), No. 20231
Envision Sustainability
Professional
LEED Accredited Professional

YEARS OF EXPERIENCE
21 TOWN OF ATHERTON TETRA TECH
built flood control facility into a multi-function green infrastructure facility. The project will also be designed to achieve a Platinum Envision Rating. This important
water quality project is part of the City’s overall efforts through the Proposition O Bond Program to improve
water quality and reduce pollutant loads that are
currently being conveyed to the rivers, lakes, and
oceans within the greater Los Angeles area.

Peck Park Canyon Stormwater Quality
Enhancement Project, City of Los Angeles, Bureau
of Engineering, San Pedro, CA. Project Engineer
and Engineer of Record. Mr. Fussel was responsible
for overseeing project design components and
incorporating the latest Low Impact Development (LID)
design strategies in water quality improvement, BMPs,
landscape architecture, Leadership in Energy and
Environmental Design (LEED), and public outreach for
this important water quality project which improved
the quality of stormwater entering and leaving Peck
Park Canyon. In addition to reducing erosion and
sedimentation, the project provided water quality
benefits by reducing the bacteria in the Canyon’s
stream and ultimately in the Los Angeles Harbor and
San Pedro Bay. Project improvements included the
implementation of bioswales and infiltration strips at
the top of the canyon, using stepped and armored
channels, dissipaters and stilling basins to reduce
runoff velocities and erosion throughout the remainder
of the park. Also included were reconstruction of
trails, passive recreational amenities and interpretive signage. In addition, to overseeing the project
design components, Mr. Fussel led the Construction
Support Services and played a key role in all submittal documents, requests for information and attended
weekly construction meetings.

Red Morton Park Stormwater Retrofit, City of
Redwood City, CA. Principal-In-Charge. Mr. Fussel
is overseeing surveying and engineering design
services for a multi-beneficial regional stormwater
capture project at Red Morton Community
Park in Redwood City. Tetra Tech conducted a
topographic survey, comprised of ground survey
and aerial photogrammetry, and performed detailed
investigations of the site in order to allow the design team to understand above ground and potential
subsurface constraints that may limit the project
footprint. Tetra Tech is responsible for providing
the PS&E for the construction of the 9-15 acre feet
stormwater capture and treatment facility, as well as
the site development necessary to rebuild affected
work zone of Red Morton Park. Components to the
stormwater treatment system include a pre-treatment,
detention, and media filtration before returning the
diverted water back to the San Francisco Bay via the
reinforced concrete box channel that runs through
Red Morton Park. Surface restoration options will
include artificial turf, pervious pavers, and vegetative recirculation swales, and secondary treatment for
irrigation.

Caruthers Park Stormwater and Urban Runoff
Capture Project, City of Bellflower, CA. Project
Manager responsible for overseeing the predesign and design services for this Caltrans funded stormwater capture project. Tetra Tech prepared a
Project Engineering Study Report (PESR) that included
all necessary analyses to provide a recommendation
for regional stormwater capture treatment and
implementation. The analysis identified the existing
site hydrology, water quality, and hydraulics to
determine an optimal combination of the inflow
rate, storage volume, and outflow. The Caruthers
Park Project consists of a gravity diversion from two
separate Los Angeles County Flood Control District
storm drain lines; a 72” RCP line that drains 261 acres of the Los Cerritos Channel, and a 38’ wide rectangular concrete channel that drains 2,995 acres of the Lower
San Gabriel River. The diverted flows pass through
a pretreatment system to remove trash, debris, and
sediment. The runoff is then passed into a large buried multi-chambered storage/infiltration facility that will be treated and used to irrigate the park. Flows in excess
of the required irrigation demands will pass into the
infiltration gallery to be exfiltrated through the soil to eventually combine with the ground water. The system
uses active controls to monitor the weather conditions
and empty the facility through a secured cloud-based
system. This project helps the City comply with their
bacteria and metals TMDL, while providing additional
benefits of potable water offset and park revitalization.

FUSSEL (continued)

TOWN OF ATHERTON TETRA TECH
Eric Martin has more than 11 years of experience in civil engineering design for municipal, federal, and private sector projects including preparation of site plans, street and storm drain improvements, grading plans, and utility plans. His experience includes providing hydrology analysis and hydraulic design for Low Impact Development (LID) projects. He is also experienced in performing and developing maps and plans for boundary and topographic surveys, as-built surveys, and construction staking for a wide variety of projects. His experience also includes planning, performing, and developing maps and plans for boundary and topographic surveys, as-built surveys, aerial surveys, terrestrial scanning surveys, underground utility surveys, and construction staking.

Experience
Cartan Field Water Capture Project, Town of Atherton, CA. Project Engineer. Mr. Martin was responsible for preparing conceptual design and construction documents including plans, specifications and estimate for the stormwater capture and treatment facility. The improvements will divert water from a major flood control storm drain (Atherton Channel), convey it to an underground infiltration/detention system, and evaluate the potential end points of reuse, irrigation, infiltration, and/or filtration in real time. The project involves initial engineering and geotechnical assessments, detailed design, environmental compliance, permitting, construction of a pneumatic diversion structure and gravity inlet piping, construction of a pre-treatment facility, construction of a high void underground storage/infiltration chamber, implementation of a cartridge filter stormwater treatment unit, disposal of excavated soil, and reconstruction and beatification of disturbed portions of the site.

The project is part of the Town’s goal to implement green infrastructure planning, stormwater resource planning, mercury/PCBs load reduction, and trash load reductions.

Red Morton Park Stormwater Retrofit, City of Redwood City, CA.

Project Manager. Mr. Martin is responsible for the direction of the design effort, and dedicating the resources necessary to see that the design objectives, schedule, and budget goals are met for this multi-beneficial regional stormwater capture project. Tetra Tech conducted a topographic survey, comprised of ground survey and aerial photogrammetry, and performed detailed investigations of the site in order to allow the design team to understand above ground and potential subsurface constraints that may limit the project footprint. Tetra Tech is responsible for providing the plans, specifications, and estimate (PS&E) for the construction of the 9-15 acre feet stormwater capture and treatment facility, as well as the site development necessary to rebuild affected work zone of Red Morton Park.

Components to the stormwater treatment system include a pre-treatment, detention, and media filtration before returning the diverted water back to the San Francisco Bay via the reinforced concrete box channel that runs through Red Morton Park. Surface restoration options will include artificial

PROJECT MANAGER
Eric Martin, PE, PLS

EDUCATION
MS, Civil/Environmental
Engineering, California
Polytechnic State University,
San Luis Obispo, 2012
BS, Civil Engineering,
California Polytechnic State
University, San Luis Obispo,
2011

REGISTRATIONS/

CERTIFICATIONS
Professional Engineer,
California No. 84829
Professional Land Surveyor,
California No. 9718

YEARS OF EXPERIENCE
12 TOWN OF ATHERTON TETRA TECH
turf, pervious pavers, and vegetative recirculation
swales, and secondary treatment for irrigation.

Aliso Creek – Limekiln Creek Restoration Project,
City of Los Angeles Bureau of Engineering, Los
Angeles, CA. Project Engineer. Mr. Martin provided
design services in support of the Pre-Design Report.

The project was located at the confluence of the
concrete lined Aliso and Limekiln Creek flood
channels, which merge together in the southern
portion of the project site. The project improvements
involved constructing several stormwater Best
Management Practices (BMPs) intended to treat
onsite and offsite runoff and reduce contamination
in Aliso Creek, Limekiln Creek, and the Los Angeles
River. The BMPs included low flow channel diversions,
stormwater pump stations, stormwater pre-screening
devices, bioswales, vegetated detention/retention
basin, the restoration of upland, riparian habitat, and BMP educational signage. The goal of the project was
to significantly reduce the pollutant loads, as well as transform a specifically built flood control facility into a multi-function green infrastructure facility. The project was also designed to achieve a Platinum Envision
Rating. This important water quality project was part of the City’s overall efforts through the Proposition “O”
Bond Program to improve water quality and reduce
pollutant loads that are currently being conveyed to
the rivers, lakes, and oceans within the greater Los
Angeles area.

Caruthers Park Stormwater and Urban Runoff
Capture Project, City of Bellflower, CA. Project
Engineer. Mr. Martin was responsible for predesign and design services for this Caltrans funded stormwater capture project. Tetra Tech is providing
a Project Engineering Study Report that includes all
necessary analyses to provide a recommendation
for regional stormwater capture treatment and
implementation. The analysis identifies the existing site hydrology, water quality, and hydraulics to determine
an optimal combination of the inflow rate, storage
volume, and outflow. The Caruthers Park Project
consists of a gravity diversion from two separate Los
Angeles County Flood Control District storm drain
lines; a 72” RCP line that drains 261 acres of the
Los Cerritos Channel, and a 38’ wide rectangular
concrete channel that drains 2,995 acres of the Lower
San Gabriel River. The diverted flows pass through
a pretreatment system to remove trash, debris, and
sediment. The runoff is then passed into a large buried multi-chambered storage/infiltration facility that will be treated and used to irrigate the park. Flows in
excess of the required irrigation demands will pass
into the infiltration gallery to be exfiltrated through the soil to eventually combine with the ground water. It is anticipated that the system will use active controls to monitor the weather conditions and empty the facility
through a secured cloud-based system. This project
will help the City comply with their bacteria and metals TMDL, while providing additional benefits of potable
water offset and park revitalization.

Bolivar Park, Stormwater and Runoff Capture
Project, City of Lakewood, CA. Design Engineer. Mr.

Martin was responsible for plans, specifications and
estimate for the development of a stormwater capture
and treatment project. Included existing utility analysis and production of engineering plans related to the
design of a stormwater diversion and infiltration system consisting of a diversion structure, pre-treatment,
force main piping system, underground storage and
infiltration structure, and overflow return line piping to the storm drain system. Tetra Tech was contracted to
evaluate the potential site location and develop this
stormwater runoff and capture project. The project
consists of an air-inflated rubber dam diversion system to re-direct all urban runoff and stormwater runoff from the Del Amo channel through a pre-treatment system
to remove trash, debris, and sediment. A pump station
and drainage pipeline will convey the water into a
large, buried multi-chambered storage/infiltration
facility. The stormwater collected in the underground
reservoir will be treated and used to irrigate the park’s landscaped areas. The system will monitor the weather
conditions and the facility through a secured cloudbased system. The underground storage system is

2.8 million gallons (8.7 ac-ft). The project not only
helped the City comply with the metals Total Maximum
Daily Loads (TMDLs), as presented in the Los Cerritos
Channel Watershed Management Program, but
also provides additional benefits, such as revitalized
park infrastructure and augmentation of local water
supplies.

MARTIN (continued)

TOWN OF ATHERTON TETRA TECH
Ike Pace has 26 years of experience providing technical support to federal, state, municipal, and private clients in the areas of water resources management, planning and designing of levees and dams, river restoration, fish passage, flood control, flood mitigation analysis, and cost engineering, He has provided structural engineering support for numerous flood control elements including retaining walls, floodwalls, rectangular channels, trapezoidal channels, and side drain inlets. He has also been highly involved with the structural Design Criteria Review for the Periodic Inspection of Federal levees, which allows him to stay current with the latest USACE EMs, ERs, and ETLs. Mr. Pace is currently managing a dam spillway enlargement in Porterville California for the USACE
Experience
Santa Clara River Levee (SCR-1) Final Design, Ventura County Watershed Protection District, Ventura County, CA. Project Manager/ PIC. Responsible for developing hydrology, river hydraulics, interior drainage, and geotechnical engineering analyses and preparing construction documents including plans, specifications, and estimates.

The work was prepared in compliance with FEMA Levee Certification guidelines and to obtain USACE Section 408 permit approval. The levee improvements included reconstructing the levee from Hwy 101 to Central Avenue Drain with soil cement erosion and scour protection, improving interior drainage facilities, and educational betterments adjacent to Rio School.

Berryessa Creek General Reevaluation Report, USACE Sacramento District, Santa Clara County, CA. Project Manager. Design and cost reviewer on this project under contract with the Sacramento District, Corps of Engineers. The study considers the feasibility of modifying the authorized project for flood damage reduction and sediment control.

The effort is currently assessing with-project alternatives leading to a recommended plan. Tetra Tech’s role includes plan formulation, economic analysis, environmental and HTRW analysis, design and cost estimating, and hydrologic/hydraulic analysis.

Ventura River Levee (VR-1) Final Design, MBI / Ventura County Watershed Protection District, Ventura County, CA. Project Manager/ PIC. Responsible for developing hydrology, river hydraulics, interior drainage, and geotechnical engineering analyses. The work was prepared to support the final design to obtain a USACE Section 408 permit and in compliance with FEMA Levee Certification guidelines. The levee improvements included deepening the scour protection, rehabilitating bank protection, establishing an SPRR closure, and improving interior drainage facilities.

Meiners Oaks Levee and Live Oak Acres Levee Feasibility Study, Ventura County Watershed Protection District, Meiners Oaks, and Oak View, CA. QA/QC. Responsible for developing preliminary

QA/QC MANAGER
Ike Pace, PE, CCP

EDUCATION
BS, Civil Engineering, Utah
State University, 1996

REGISTRATIONS/

CERTIFICATIONS
Professional Engineer,
California No. 59152

YEARS OF EXPERIENCE
26 TOWN OF ATHERTON TETRA TECH
design engineering analyses in pursuit of feasible
alternative solutions required to address the identified deficiencies for Live Oak Acres Levee and the new
Meiners Oaks Levee. The effort includes scour,
interior drainage, geotechnical, and alternative
analyses. These technical studies will support levee
improvement to achieve FEMA Levee Certification for
the two levee systems.

Stevens Creek Condition Assessment and Asset
Management Plan, Valley Water, Santa Clara
County, CA. QA/QC Specialist. Performed quality
assurance and control for the comprehensive update
to the Asset Management Plan of Stevens Creek, a
key 23-mile waterway extending from the Santa Cruz
Mountains to San Francisco Bay. Responsible for
ensuring the integrity and accuracy of geomorphic
and hydraulic assessments used to address systemic
deficiencies. Verified the detailed study outcomes
identifying erosion patterns and areas needing urgent
stabilization, and reviewed the development of
practical design solutions such as rock riffle structures and floodwalls. Ensured all proposed solutions and
strategic discussions met high-quality standards
and were feasible, supporting the delivery of wellsubstantiated conceptual improvements, cost estimates, and management strategies for enhanced
flood protection.

East Garden Grove - Wintersburg Levee DesignBuild, Orange County Public Works, Huntington Beach, CA. Project Manager/PIC. Responsible
for Design-Build efforts to develop hydraulic,
geotechnical, groundwater, and structural engineering
analyses and prepare construction documents
including plans, specifications, and estimates. The
project improvements include the installation of 2
sets of hydraulically pressed (Gilken method) sheet
pile walls set about 16 feet apart to a depth of about
46 feet below levee roadway design grade on both
the right and the left banks of the channel and partial removal of the existing earthen levee. This will allow
for the widening of the existing channel to convey
the anticipated flows for the 100-year design storm
event. The soil in between the sheet pile walls will
be improved throughout the entire depth of 46 feet
by constructing Deep Soil Cement Mixing (DSCM)
columns that will mitigate the liquefaction potential
under the design seismic events.

Success Dam Spillway Modifications, USACE
Sacramento District, Tulare County, CA. Cost
Estimator/Project Manager. Responsible for
developing blasting, geotechnical, and structural
engineering analyses and preparing construction
documents that included plans, specifications,
and MCACES cost estimates. The purpose of the
project is to increase the Success Lake pool elevation
and volume for flood control and irrigation. The
improvements included blasting a wider spillway,
constructing a new 10-ft high concrete ogee weir
across the spillway, and realignment of Avenue
146 road which will be blasted within the right
abutment slope to provide continued vehicle access.

Additionally, there are several pump houses and
recreational facilities that will be relocated or floodproofed.

Ventura River Levee (VR-2) Feasibility Study,
Ventura County Watershed Protection District,
Casitas Springs, CA. Project Manager. Responsible for
developing preliminary design engineering analyses
in pursuit of feasible alternative solutions required to address the identified deficiencies. The effort includes topographic mapping, hydraulics, sediment transport,
scour, interior drainage, geotechnical, and alternative analyses. These technical studies will support levee
improvement to achieve FEMA Levee Certification for
the VR-2 Levee System.

PACE (continued)

TOWN OF ATHERTON TETRA TECH
Orlando Lopes is a Professional Engineer licensed in California, specializing in the management and improvement of flood control systems and levee infrastructure. With expertise in GIS mapping, hydrology, hydraulics, and project management, Orlando has led numerous high-profile engineering projects throughout Southern California and Arizona. His work includes conducting comprehensive condition assessments, developing and designing flood protection solutions, and steering multi-stakeholder collaborations to ensure community safety and compliance with regulatory standards.

Experience
Stevens Creek Condition Assessment and Asset Management Plan, Valley Water, Santa Clara County, CA. Project Manager. Managed the comprehensive update to the Asset Management Plan of Stevens Creek, a 23-mile waterway flowing from the Santa Cruz Mountains to San Francisco Bay. He led the strategic revision of the Asset Management Plan to address systemic deficiencies by incorporating geomorphic and hydraulic assessments. Orlando oversaw the geomorphic study to identify erosion patterns and areas requiring urgent stabilization and enhancement, developing tailored and practical concept designs such as rock riffle structures and strategically identified locations for proposed levees or floodwalls to enhance flood protection. He coordinated with various Valley Water groups to ensure solutions were fair and feasible, leading inclusive discussions on the creek’s improvement and maintenance.

Orlando’s effort on this project provided the client with realistic conceptual improvements (based on geomorphic insights), cost estimates, and a menu of management strategies to consider for implementation of the improvements.

Soboba Flood Damage Assessment and MDP, and 2017 FEMA Design, Soboba Band of Luiseno Indians, San Jacinto, CA. Project Engineer.

Developed a comprehensive master drainage plan to mitigate flooding across the reservation, including the adjacent casino property. Orlando conducted detailed hydrologic analyses using Advanced Engineering Software (AES) Rational Tabling and Synthetic Unit Hydrograph Versions (AES 2014), and hydraulic evaluations through FlowMaster and Federal Highway Administration methodologies. This work led to the identification and prioritization of essential facilities aimed at resolving flooding issues, enhancing the reservation’s infrastructure resilience. This project facilitated the successful application for FEMA grant programs, including HMGP, 404, and 406. In a subsequent phase, Orlando prepare the final design for two drainage improvement structures to supplement the previously prepared master drainage plan. He performed the hydraulic analysis using HEC-RAS and FlowMaster, and subsequently assisted in preparing the design plans using AutoCAD Civil 3D and cost estimates. The project

HYDROLOGY/HYDRAULICS LEAD
Orlando Lopes, PE

EDUCATION
BS, Civil Engineering,
University of California, Irvine,
2014
MS, Civil and Environmental
Engineering, California State
University, Fullerton, 2018

REGISTRATIONS/

CERTIFICATIONS
Professional Engineer,
California No. 90238

YEARS OF EXPERIENCE
10 TOWN OF ATHERTON TETRA TECH
provided the client with a sustainable flood protection project on the Soboba Indian Reservation.

Meiners Oaks and Live Oak Acres Feasibility Study,
Ventura County Watershed Protection District,
Ventura County, CA. Project Manager. Managed
and performed the technical analyses and alternatives
analyses to support the selection of a levee design
alternative along the Ventura River. Coordinated with
the client who had other stakeholders involved. This
included: local community members, Surfrider, Coastal
Commission, Matilija Dam Coalition, and Casitas
Municipal Water District. Our report provided a step in the direction to continue with the project. The selected alternative and cost estimates were used to secure
funding for the next phase of design.

Santa Clara River Levee Final Design, Ventura
County, Santa Clara River, CA. Project Engineer.

Provided engineering services to support the County’s
desire to partner with the USACE to accomplish
remediation required to bring the SCR-1 system into
compliance with FEMA Levee Certification guidelines.

Prepared 408 Permit Applications for USACE approval,
cost estimates, and betterment alternative plan sets.

Orlando will help to execute the final design technical studies, and subsequently, the final design plans,
specifications, and cost estimates. These technical
studies supported levee improvement to achieve
FEMA Levee Certification for the SCR-1 Levee System.
2020 – 2022 Periodic Inspections for USACE
Levee Systems, USACE Los Angeles District, CA.

Project Manager. Under five separate task orders,
Orlando oversaw the Periodic Inspection of 24 levee
systems across Southern California and Arizona,
covering over 85 linear miles. He led inspections
to meet USACE standards, coordinating field
operations and pre- and post-inspection activities.

Orlando collaborated closely with local sponsors,
primarily county agencies, to inspect the systems
and presented findings to the USACE Engineering
Division, including the Levee Safety Program Manager
and Chief Levee Safety Officer. Orlando and his team
delivered comprehensive reports with photos, maps,
checklists, and figures to clearly convey the condition of the levees, enabling the USACE and local sponsors
to easily understand the state of the systems under
assessment. He ensured thorough reviews, maintained
the project’s timeline and budget, and guaranteed
accurate field determinations and adherence to
inspection standards.

La Salina Hydraulic and Hydrology Support and
CLOMR, City of Oceanside, CA. Project Manager.

Responsible for performing and overseeing the
technical studies to complete the CLOMR under
FEMA requirements. The proposed project involved
removing infrastructure and repurposing land within
the floodway. To comply with FEMA requirements,
an H&H analysis was performed to understand the
impacts that the proposed project would have on
the existing regulatory floodway. This effort involved
requesting information from FEMA, generating several
HEC-RAS hydraulic models, developing floodplain
delineations, and documenting results. This effort
provided the client with the appropriate analysis
and documentation required to permit the project
under FEMA’s National Flood Insurance Program
Requirements.

Hydrologic and Hydraulic Evaluation for Ballona
Creek and Sepulveda Channel, City of Los Angeles,
CA. Project Manager. Responsible for the H&H
evaluation of a low-flow stormwater capture diversion
along both Ballona Creek and Sepulveda Channel.

The H&H Evaluation was completed in compliance
with Section 408 Permission requirements. Orlando
researched and identified appropriate flow rates
for these systems, prepared HEC-RAS models, and
documented results in report format. In addition, he
provided a quality assurance review of the overall 408
Permit Application. His efforts provided the client with a hydraulic analysis to understand the impacts of their design and assisted the client with their overall permit package to continue to progress the project.

LOPES (continued)

TOWN OF ATHERTON TETRA TECH
Steven Parker has experience in environmental planning and hydrologic and hydraulic engineering as a GIS specialist and Hydrology/Hydraulics Analyst.

He is an experienced geographer and GIS professional, acting as a project manager and analyst in environmental planning and hydrologic and hydraulic engineering. He has a strong background in remote sensing/image analysis, GIS, fluvial geomorphology, hydraulics, and hydrology. His experience includes field survey data collection and application and model expertise including the latest versions of HEC-RAS, as well as GeoRAS, FLO-2D, HECHMS, and GeoHMS. He acts as a mentor in GIS and ArcGIS for other staff and works well with design teams working in AutoCAD or Microstation, or with graphics teams working in Illustrator or Photoshop.

Experience
Washoe Tribe Hydrologic and Hydraulic Consultation, Gardnerville, NV. Project Manger. Managed review of hydrologic and hydraulic conditions for the Washoe Tribe of Nevada & California, focusing on select property sites along the East Fork of the Carson River and an adjoining tributary. The project aimed to prepare for the renovation of cultural resources and potential development activities by evaluating flood risk hazards, identifying data gaps in previous FEMA analyses, and assessing drainage issues. Conducted comprehensive site evaluations, reviewed FEMA and local data, and proposed design solutions to mitigate flood risks, including flood inundation mapping updates and structural adjustments like widening channels and bridge expansion. Prepared a detailed memo documenting findings and recommended actions to address critical drainage and flooding challenges.

Orange County Hydrology Manual Update, Orange County Public Works, Orange County, CA. Project Manager and GIS Lead. Acts as the project manager for this effort to update the Orange County Hydrology Manual with data from the last few decades and to bring the document to modern publishing standards. The effort includes providing interactive tools, return frequency estimation, and confidence levels, hydrologic modeling for major county watersheds, evaluation of the OCHM history and discussing confidence intervals, the calibration process, the role of radar, NOAA 14 at last updates, evaluation of expected values for mitigation purposes, evaluate subare hydrograph generation between nodes, and discussion of post-fire watershed hydrology, among other items. The text, charts, maps, and other text and formatting changes are all included in the effort to revamp the manual.

Soboba Flood Damage Assessment and MDP, Soboba Band of Luiseno Indians, CA. GIS Lead for a Master Plan of Drainage to address flooding issues throughout the reservation, including the adjacent casino property.

Tasks included Hydrologic analyses using Advanced Engineering Software (AES) Rational Tabling Version and Synthetic Unit Hydrograph Version (AES 2014), and hydraulic studies using FlowMaster and Federal Highway

HYDROLOGY/HYDRAULICS
Steven Parker

EDUCATION
MA, Geography, San Diego
State University, 2008
BA, Geography, Humboldt
State University, 1997

YEARS OF EXPERIENCE
17 TOWN OF ATHERTON TETRA TECH
Administration. Proposed facilities were identified
to address flooding issues and prioritized based on
benefit to the reservation. In addition, a floodplain
study was performed along Poppet Creek to define the
100-year floodplain. The MDP and subsequent project
descriptions were used to assist the tribe’s applications for FEMA grant programs (HMGP, 404, 406).

East Garden Grove - Wintersburg Flood Risk
Management System Analysis, Orange County
Public Works, Garden Grove, CA. Hydraulic Analyst.

To support Orange County Public Works as the local
sponsor for the USACE watershed study, Tetra Tech
was tasked with the review of the hydraulic models
for the C05/C06 and C02/C04 systems and the
development of alternative design alignments for the
C02/C04 system. Under a subsequent task order to
the USACE, Tetra Tech was tasked to evaluate and
optimize bridge crossing on the channels throughout
the East Garden Grove Flood Risk Management
System. Responsibilities included the development
of the hydraulic models to evaluate the alternatives.

In particular. 2D models were developed to allow the
client to understand the adjacent overland residual
flooding associated with each alternative. These results were presented as maps and videos showing the
progression of flooding and were used to inform upper
management and the public about the flood impacts.

Villa Park Dam Inundation Mapping Study and
Emergency Action Plan, Orange County Public
Works, Orange County, CA. Lead Hydraulic Modeler
and GIS Lead. The study included a dam break analysis
and associated floodplain mapping. Per DSOD
guidance, a sunny day breach scenario was utilized.

The HEC-RAS 2D breach functionality was used and
the parameters were determined and compared
against empirical equations developed from
documented case studies. The breach parameters
were used in the HEC-RAS 2D model to predict a
hypothetical sunny day piping failure of the dam. Due
to the high urbanization of the downstream area of
Villa Park Dam, the 2D module in HEC-RAS was also
used for the inundation mapping. The mapping effort
was driven after DWR regulatory changes after the
emergency at Oroville Dam in 2016 and Villa Park Dam
was prioritized as an extremely high-hazard dam that
could impact central Orange County. He conducted
the HEC-RAS 2D breach and hydraulic modeling,
conducted the mapping, and documented the results
which were accepted by DWR with no comment. He
followed this effort by preparing an Emergency Action
Plan for approval from CalOES that is in its final review.

Margaret Creek Watershed Sites 1 & 6, Ohio
Department of Natural Resources, OH. Lead
Hydraulic Modeler and GIS Lead. Acting as Hydraulics
and GIS lead for this effort to develop a final combined Supplemental Watershed environmental assessment
for the preferred rehabilitation approaches after a
reviewing of alternatives following NEPA, NEE, and
PR&G requirements for both sites to facilitate the
future design and implementation of a watershed
rehabilitation project. The role included 2D modeling
of both dams with several runs including with and
without dam conditions for 2, 5, 10, 25, 50, and 100-
year events in addition to breach events to evaluate
impacts downstream to develop alternatives that
included dam renovations or removal. The modeling
conformed to both NRCS and ODNR requirements
and needs for the alternative planning.

PARKER (continued)

TOWN OF ATHERTON TETRA TECH
Aric Torreyson has more than 20 years of diverse engineering experience in public works construction, environmental engineering, and infrastructure assessment.

Aric has extensive and relevant experience in stormwater design and development of BMPs and has successfully implemented sustainable design elements, including water harvesting, landscaping, and streetscaping. He has specific experience in projects throughout Southern California requiring public engagement for complete street reconstruction, emergency roadway/trail repairs, and shoreline protection tieback walls with pedestrian access. His significant involvement in LID and stormwater pollution prevention and reduction projects in Southern California has provided a deep understanding of permitting and regulatory issues in this region. He has experience with managing environmental permitting.

Experience
Lower Penitencia Creek Flood Control Project, Santa Clara Valley Water District, Milpitas, CA. Civil Engineer and Design Manager.

Managed preparation of construction documents for approximately 1 mile of flood control improvements, involving coordination with structural, geotechnical, and landscape technical staff. The project includes right-ofway acquisition, levee design, sheet pile design, hydraulic engineering, utility relocations, and environmental coordination. The purpose of the creek improvements is to add channel capacity with the use of levee improvements consisting of sheet pile floodwalls, closure structures, and earthen embankment fills. Additionally, the creation of freshwater wetlands and tidal habitats is included as part of this project. Responsible for the preparation of plans, specifications, and construction cost estimates.

Upper Berryessa Creek Flood Risk Management Project, Santa Clara Valley Water District, Milpitas, CA. Design Manager. Prepared construction documents for approximately 2 miles of flood control improvements to widen the earthen bottom channel and provide natural bank stabilization on the side slopes. Upper Berryessa Creek is a badly eroded earthen channel; the proposed project is to widen the channel and provide a cellular bank stabilization on the side slopes with an earthen bottom. Improvement plans involved coordination with structural, geotechnical, and landscape disciplines, and two UPRR railroad crossings.

Additionally, right-of-way acquisition, hydraulic design, and utility research and relocations were performed.

Soboba Road Emergency Repairs, Soboba Band of Luiseno Indians, Riverside County, CA. Project Manager. Led the Soboba Road S curve emergency repairs and widening due to storm damages incurred in the winter of 2016. He designed a storm drain culvert and roadway improvements to prevent the repeated washout of this vital roadway and primary entrance to the tribal reservation. Improvements consisted of approximately 1,400 linear feet of roadway repair, including widening, curb and gutter, storm drain, and safety improvements. Mr. Torreyson also assisted in securing grant funding through FEMA grant programs 404 and

CHANNEL DESIGN LEAD
Aric Torreyson, PE, ENV SP

EDUCATION
BS, Civil Engineering,
California State Polytechnic
University, Pomona, 2000

REGISTRATIONS/

CERTIFICATIONS
Professional Engineer:

California No. 66068
Envision Sustainability
Professional

YEARS OF EXPERIENCE
20 TOWN OF ATHERTON TETRA TECH
406. He worked closely with the Soboba Public Works
Department and the Tribal Council to coordinate and
process the grant funding from FEMA. Plans for the
project were developed in AutoCAD.

Washoe Tribe Hydrologic and Hydraulic
Consultation, Gardnerville, NV. QA/QC Specialist.

Conducted comprehensive quality assurance and
control for the hydrologic and hydraulic assessment
project for the Washoe Tribe of Nevada & California.

This role involved overseeing the accuracy and
reliability of data used in evaluating flood risks at
property sites along the East Fork of the Carson River
and its tributaries. Ensured the integrity of FEMA and
local data assessments, verified site visit accuracy,
and scrutinized proposed flood risk mitigation
solutions, including updates to flood inundation
mapping and structural adjustments. Prepared and
reviewed detailed reports to ensure all findings and
recommended actions met stringent quality standards
and provided dependable solutions for critical
drainage and flooding issues.

Stevens Creek Condition Assessment and Asset
Management Plan, Valley Water, Santa Clara
County, CA. QA/QC Specialist. Performed quality
assurance and control for the comprehensive update
to the Asset Management Plan of Stevens Creek, a
key 23-mile waterway extending from the Santa Cruz
Mountains to San Francisco Bay. Responsible for
ensuring the integrity and accuracy of geomorphic
and hydraulic assessments used to address systemic
deficiencies. Verified the detailed study outcomes
identifying erosion patterns and areas needing urgent
stabilization, and reviewed the development of
practical design solutions such as rock riffle structures and floodwalls. Ensured all proposed solutions and
strategic discussions met high-quality standards
and were feasible, supporting the delivery of wellsubstantiated conceptual improvements, cost estimates, and management strategies for enhanced
flood protection.

East Garden Grove-Wintersburg Channel,
Orange County Flood Control District Huntington
Beach, CA. Design Manager. Oversaw hydraulic
design, geotechnical analysis, groundwater, and
structural engineering analyses for the preparation
of construction documents for the Construction
Management at Risk (CMAR)/Design-Build effort. The
work included the preparation of AutoCAD Civil3D
plans, specifications, Design documents, and quantity
estimates. The project improvements include the
installation of 2 sets of hydraulically pressed (Gilken method) sheet pile walls set about 16 feet apart to
a depth of about 46 feet below the levee roadway
design grade, soil mixing, and bridge modifications.

The design was performed to USACE EM and ER
standards for future cost reimbursement as part of the
Westminster Flood Control Project.

Taylor Yard Paseo Del Rio, Los Angeles BOE, City
of Los Angeles, CA. Project Manager. Mr. Torreyson
managed the hydrology & hydraulics (H&H) and
water quality models for Alternative 2 identified in
the Project Concept Report for Taylor Yard G2 Water
Quality Improvement Projects (TOS No. 48). The
analysis included treatment sizing, optimization, and
determination of pollutant constituents for diversion
and treatment of stormwater (wet weather and dry
weather) from two storm drain facilities that transect
the project (Union Pacific Railroad Company (UPRC)/
City drain and Eagle Rock Drain).

TORREYSON (continued)

TOWN OF ATHERTON TETRA TECH
Jung Suh is a civil engineer with 22 years of experience in the preparation of construction documents for various federal and local clients. The work includes the field of surface water hydrology and hydraulic analysis of natural rivers and streams, flood control channels and levees, stormwater design, and alluvial fan flood flows. Jung has design experience in open-channel flow, closed-channel conduit, debris/detention basins, and local storm drains and catch basins. His design experience also includes computer-aided design using AutoCAD and Civil 3D software, Bentley OpenRoads, ProjectWise, MicroStation, and InRoads systems, and design technical specifications.

Experience
Santa Clara River Levee (SCR-1) Improvement Project, Ventura County Watershed Protection District, Oxnard, CA. Project Engineer. Designed the levee re-alignment to protect against the 100-year storm for the Santa Clara River while also leaving space in the right-of-way to improve the levee for the 200-year storm in the future. Initially utilized Bentley MicroStation to prepare construction documents per the client’s requirements and US Army Corps of Engineers standards. Currently, converted all-digital design files into AutoDesk Civil 3D format to meet the client’s needs and to continue the design process. Coordination efforts involved Caltrans, the City of Oxnard, and California Resources Corporation for street and utility improvements. The levee improvement will ensure the client receives FEMA certification and removes adjacent residents from the 100-year flood zone. Prepared a basis of design reports and cost estimates for the project.

Ocean View Channel, USACE Los Angeles District, Orange County, CA. Project Engineer. Assisted in the preparation of construction-level design plans, Design Documentation Reports, quantity calculations, and cost estimates to repair and bring the Ocean View Channel (C06) to current design practices. The 2,200-foot-long earthen trapezoidal channel extends from the confluence with East Garden Grove – Wintersburg Channel (C05) to immediately downstream of Beach Boulevard in the City of Huntington Beach, CA. The design would provide channel stability by regrading and constructing concrete lining to the damaged channel sections while providing connection to existing storm drain outlets. The project included the use of MicroStation and InRoads to design the repair in 3-dimensional surfaces.

Madera County Levee Repair, Madera County Department of Public Works, Madera County, CA. Project Manager. Preparation of construction-level design plans, basis of design report, quantity calculations, and cost estimate to repair the levee seepage problems and damaged levee access roads along the Fresno River, Berenda Slough, and Ash Slough located in Madera County, CA. The project was funded by the FSRP grant agreement between the California State Department

CHANNEL DESIGN
Jung Suh, PE

EDUCATION
MS, Civil and Environmental
Engineering, University of
Michigan, 1999
BS, Civil Engineering,
University of Michigan, 1998

REGISTRATIONS/

CERTIFICATIONS
Professional Engineer:

California, No. 62252

YEARS OF EXPERIENCE
22 TOWN OF ATHERTON TETRA TECH
of Water Resources and the County of Madera. The
project includes civil designs, geotechnical subsurface exploration and analysis, environmental assessment
and permitting, real estate acquisition, topographical
survey, construction, and engineering during
construction.

SARI: 2018 EDC, Orange County Public Works,
Orange County, CA. Project Manager. Prepared a
construction design, on behalf of OCPW, to protect
the existing SARI line and its manhole against future
scour by Santa Ana River. Project stakeholders include
the USACE Los Angeles District and Orange County
Public Works (OCPW). The design became part of
the USACE’s construction documents. Provided
engineering services during the construction phase for
the SARI line and protection design.

Compton Creek Interior Drainage Analysis, Los
Angeles County, Compton, CA. Project Manager.

The Compton Creek levee system was designated
as a non-accredited levee by FEMA and located
along Compton Creek immediately upstream of the
confluence with the Los Angeles River. Prepared
floodplain mapping based on the levee reach
procedure and interior drainage analysis by FEMA
Levee Analysis and Mapping Procedures (LAMP)
guidelines. A FLO-2D model, a 2-dimensional
hydraulic model, is used to model storm drains
and pump stations in the interior (landward side) of
the levee and floodplains associated with them. A
coincident flow analysis at the confluence is included
as the Compton Creek water surface profile is greatly
influenced by the hydraulic conditions of the Los
Angeles River. Provided coordination with FEMA to
determine which drainage structures or systems to be
analyzed in the interior drainage analysis.

Aliso Creek Mainstem Ecosystem Restoration,
USACE Los Angeles District, Orange County, CA.

Project Engineer. Prepared feasibility-level design
plans, basis of design report, quantity calculations,
and cost estimate to improve Aliso Creek between the
treatment plant owned by the South Orange County
Wastewater Authority and Pacific Park Drive. The
design includes four design alternatives including a
no-action plan. Each alternative consists of baseline
condition design (channel grading and riffle structures) and multiple design options (addition measures) that
can be incorporated into the alternative formulation.

The design would provide channel stability and
aquatic connectivity for selected species within the
project limits. Tetra Tech has been selected to continue the next phase of the project which involves further
development of the USACE’s preferred alternative.

Rio De Flag Flood Protection Design, USACE Los
Angeles District, Rio De Flag, AZ. Project Engineer.

The Rio de Flag and Clay Avenue Wash channels cross
the heavily urbanized areas of Flagstaff, Arizona, with a combined drainage basin area of approximately
15 square miles. The improvements for these
undersized earthen channels include a combination
of underground RCB, rectangular channel, and Open
downstream channel. Prepared construction-level
design plans, specifications, and cost estimates, and
updated a Design Documentation Report and its
appendices (hydrology and hydraulics).

Levee Certification for SLFPA-East 40 Arpent and
Maxent Levee, Saint Bernard and Orleans Parish,
LA. Civil Engineer. Performed civil design to improve
levee deficiencies using Civil3D software to meet the
levee certification requirements. The project included
the required analysis for a system that serves as a
secondary line of defense (back levee to the Hurricane
System), application of risk and uncertainty (USACE
standards) to a non-riverine situation (i.e. the Central Wetlands controlled by IHNC), and discrepancy in
geotechnical requirements (USACE Headquarters,
USACE New Orleans District).

FEMA Letter of Map Revision Study for Eagle
Canyon Dam, Riverside County, Palm Springs, CA.

Project Engineer. Performed a dam breach analysis for
the Eagle Canyon Dam in Palm Springs, CA, as part
of FEMA Letter of Map Revision package preparation,
for Riverside County Flood Control and Water
Conservation District. Dam breach parameters were
determined for sunny-day piping and event-based
overtopping breach failure scenarios by developing
the National Weather Service BREACH model and
comparing them to the empirical equations developed
from documented case studies. Then, an FLDWAV
model was developed using the selected ranges of
breach parameters to develop a breach hydrograph to
be used in FEMA floodplain delineation.

SUH (continued)

TOWN OF ATHERTON TETRA TECH
Eric Olea has 4 years of experience as a water resources engineer. He began his career at the City of Santa Ana Water Resources Department, working on several city improvement projects. He has been involved in several water projects and has led inspections of several County and Corps flood control facilities. He is experienced in various civil drawing software and compiling cost reports
Experience
C05 FEMA LAMP Documentation, OCPW, Orange, CA. Project
Manager. OCPW has requested a FEMA Levee Analysis and Mapping Procedures (LAMP) for non-accredited levees documentation package for the C05 improvements from Warner Ave. to D/S of Goldenwest Street. Responsible for all official communications with the County and subconsultants, including ensuring that monthly progress reports and invoices are submitted in an accurate and timely manner. Assisted with preparing the LAMP report.

FY23 CMP CCTV Support, City of San Diego, CA. Project Manager. The Storm Water Division has initiated repair and replacement of CMP pipes through three methods: in house replacement, pipe lining, and traditional CIP replacement done by a contractor, but requires support determining how and when the remaining CMP inventory should be repaired or replaced. The purpose of this task order is to perform CCTV to determine how the remaining CMP inventory should be repaired or replaced and prioritized. Responsible for all official communications with the City and subconsultants, including ensuring that monthly progress reports and invoices are submitted in an accurate and timely manner while the Task Order is active. Additional tasks included easement determination for City pipes to determine whether they are located within City ROW.

Live Oak Acre Levee Final Design, Ventura County, Live Oak, CA.

Project Engineer. This levee design work is part of the Matilija Dam Ecosystem Restoration project and will mitigate potential flooding impacts due to the removal of the Matilija Dam, and shall satisfy the requirements of Title 44 of the Code of Federal Regulations, Section 65.1 O (44CFR65.10) so that levee certifications can be submitted to FEMA. Assisted in drafting the design using AutoCAD Civil 3D and producing exhibits.

Santa Fe Drive Complete Street, City of Encinitas, CA. Project Engineer.

The project entails connecting an existing partial bikeway along Santa Fe Drive and upgrading to a Class 1 bike path. In addition, the project aims to replace aging utilities, including undergrounding power and communication lines, and add new storm drain improvements. The

CHANNEL DESIGN
Eric Olea, EIT

EDUCATION
MS, Civil Engineering,
California State University
Fullerton, exp. 2024
BS, Civil Engineering,
California State University
Fullerton, 2020

REGISTRATIONS/

CERTIFICATIONS
Engineer-in-Training:

California, No. 168435

YEARS OF EXPERIENCE
4 TOWN OF ATHERTON TETRA TECH
project will incorporate streetscape enhancements
including pavement enhancements at crosswalks
and intersections, full ADA compliance, and
landscape improvements (incorporating Low Impact
Development techniques). Responsible for drafting
the street reconstruction of 1.2 miles of Santa Fe
Drive using AutoCAD Civil 3D. Eric is providing the
construction quantities, and a detailed cost estimate
using RSMeans and other dependable sources..
2022 Levee Periodic Inspections, USACE Los
Angeles District, Various Locations, CA. Project
Engineer. Performed field inspections using the Levee
Inspection System tablet software and prepared a
handful of Periodic Inspection Reports for each of
the levee systems. Used available levee information
(inspections, design manuals, as-built drawings, and
available references) to compile information that could assess the as-built condition of the levee to the current condition of the levee. This effort included mapping
and reporting of the deficiencies following USACE SPL
standards, which allowed the client to evaluate the
condition of their levees.

Adventure Park Stormwater Diversion and
Treatment, Los Angeles County Public Works,
Whittier, CA. Project Engineer. The project aims to
reduce long-term annual pollutant loading to the
Upper San Gabriel River waterways by implementing
watershed control measures and structural BMPs while
incorporating additional project benefits such as LID
measures and sustainable landscaping in the park. The
project includes a channel diversion system, pump
system, pretreatment unit, underground storage,
and filtration unit. Assisted in drafting the treatment system design using AutoCAD Civil 3D. Provided the
construction quantities, and a detailed cost estimate
following LA County’s standards.

Flood Control Works Inspections, USACE Los
Angeles District, Various Locations, CA. Project
Engineer. Conducted field inspections of various
County channels, levees, and basins and prepared
several Continuing Eligibility Reports (CEI) for the
various flood control works (FCW). This project
encompassed performing field inspections and
compiling CEI reports for over 100 FCW to document
the existing/current conditions of each FCW and
determine if the FCW still meets USACE SPL criteria.

The USACE SPL will use the CEI reports to determine
the condition of the FCWs and provide appropriate
assessments for the County’s flood control structures.

Rio De Flag Flood Control Project, USACE Los
Angeles District, Flagstaff, AZ. Project Engineer.

The Rio de Flag and Clay Avenue Wash channels cross
the heavily urbanized areas of Flagstaff, Arizona, with a combined drainage basin area of approximately
15 square miles. The improvement for these
undersized earthen channels includes a combination
of underground RCBs, a rectangular channel, and an
Anchored Reinforced Vegetative System channel.

Provided design support using Microstation as well as
providing quantity calculations.

OLEA (continued)

TOWN OF ATHERTON TETRA TECH
Kyle Cross brings more than 13 years of experience in the design of municipal infrastructure. His design experience includes water distribution systems, wastewater collection systems, site grading, and stormwater analysis. He has the knowledge to utilize the latest in AutoCAD Civil 3D software to generate clear and accurate construction plans. Kyle’s experience in survey and construction observation has provided him a strong understanding of the transition from design to construction.

Experience
Intel Bowers Campus – Recycled Water Line, Intel, Santa Clara, CA.

Civil Engineer for the new 2” and 6” recycled water lines to support Intel’s commitment to water conservation and offset potable water demand at the Intel Bowers Campus. Coordinated the field investigation which included existing utility locating utilizing GPR to identify potential utility conflicts along the proposed recycled water line alignment. Designed the horizontal and vertical alignment of the 2” irrigation and 6” cooling/dualuse lines per South Bay Water Recycling (SBWR) and the City of Santa Clara Rules & Regulations. Collaborated with the multidisciplinary project team to standardize and optimize recycled water project delivery and permitting for implementation at other Intel Campuses. Supported the Client with the on-site and off-site permitting process through SBWR and the City to ensure project milestones were achieved.

Western Our Way Walk and Wheel Improvements Project (ATP 6), City of Los Angeles, Bureau of Engineering, Los Angeles, CA. Project Engineer. The project includes 4.5 miles of pedestrian and transit rider improvements in the heart of South Los Angeles. Extensive pedestrian improvements including traffic calming along Western Avenue will provide safer and more direct access for disadvantaged community members to transit lines and local destinations in contrast to the current conditions of the high-speed vehicular oriented corridor. Addition of street trees, pedestrian lighting, widened sidewalks, and bus bulbs will improve pedestrian safety and user comfort. Adjacent local streets will be improved to create neighborhood bike network streets along Gramercy Avenue and Denker Avenue which will create an exclusive path for bikes connecting to the greater South Los Angeles bike network and Rail to Rail Active Transportation Corridor. Mr. Cross provided civil engineering design for the mini roundabout, diagonal diverters, curb extensions, bus bulbs, and medians to support the roadway improvements for the project. Mr. Cross facilitated the data collection, environmental permitting, and stakeholder engagement phases of the project.

CIVIL ENGINEERING
Kyle Cross, PE

EDUCATION
BS, Civil Engineering,
University of Minnesota, 2011

REGISTRATIONS/

CERTIFICATIONS
Professional Engineer:

Colorado, No. 51745
Oklahoma, No. 33135

YEARS OF EXPERIENCE
13 TOWN OF ATHERTON TETRA TECH
Upper Wood Road Multimodal Improvements,
Town of Snowmass Village, CO. Project Manager/
Engineer. Kyle was responsible for the improvements
to a 0.5-mile section of Wood Road above Snowmass
Base Village. The project included stormwater
improvements, two bus stops, pedestrian crosswalks,
sidewalks, a metal staircase, and guardrail. The design for the project included a site survey, detailed grading plans, roadway plan and profiles, drainage design,
as well as shallow utility coordination. It also included ADA accessibility design on a roadway with sustained
grades of eight percent. Kyle provided construction
support services during construction and attended
weekly meetings with the Contractor, Client, and Town
staff.

French Street Roundabout, Town of Breckenridge,
CO. Project Manager. Tetra Tech was selected
for the design of a modern roundabout at the
intersection of French Street and State Highway 9
in the Town of Breckenridge. The project includes
pavement and roadway design, multi-modal traffic
flow simulations, traffic control, CDOT permitting,
drainage improvements, lighting, drainage, rightof-way acquisition, and utility relocations. Mr. Cross developed detailed design plans for the roundabout
to support the traffic increases at the intersection
from the development. Mr. Cross facilitated the ROW
acquisition and environmental clearance process with
CDOT.

Manilla Road Improvements, ARB Midstream, LLC,
Bennett, CO. Project Manager for the development
of the 144-acre parcel. Coordinated and managed
the topographic survey, environmental assessment,
wetland survey, geotechnical investigation and
conceptual site layout to support the development of
the site. Prepared narratives and drawings to complete
the land use planning and permit processing for the
facility. Analyzed fire flow area of buildings based on construction type and confirmed available capacity
of the existing municipal water system. Developed
County right of way plans and permit documents for
site access. Attended county planning commission
hearings and fielded engineering related questions
from the committee members and public. Erosion
control plans, a preliminary and final drainage study,
traffic impact study and final site grading plans were
developed for the site. Low impact design principles
were utilized during the site design process to
meet county land development and stormwater
requirements. Prepared highway widening plans
triggered by the traffic impact study to support the
development of the site within a truncated schedule.

Engaged with relevant stakeholders throughout the
project life cycle.

Central Business District Sanitary Sewer Evaluation
Survey & Improvements, Tulsa Metropolitan Utility
Authority, Tulsa, OK. Project Manager. The Central
Business District is the focus of a large initiative to draw tourism and to capitalize on the area’s historic culture.

To support the redevelopment initiative, Tetra Tech
was engaged to rehabilitate or replace aging sewer
lines before they fail. Tetra Tech provided SSES field
work and assisted TMUA CCTV efforts with mapping
and prioritization of lines in the project area. The line segments were evaluated using CCTV data and rated
for likelihood of failure based on PACP ratings. Tetra
Tech developed rehabilitation recommendations and
construction documents for the sanitary sewer lines.

Mr. Cross led an agile design effort that was flexible
and adapted to changes in development priorities by
city leaders and commercial developers during the
project.

Retreat Land at Lone Rock, Lone Rock Foundation,
Bailey, CO. Project Engineer. Mr. Cross is the
design engineer for the project, which consists of a
Conference and Retreat Facility to be constructed
on property historically referred to as Lone Rock
Ranch. The Conference and Retreat Facility will
be run as a nonprofit institute serving the public
education community’s development of educators
and leadership. Project elements included water
distribution, a gravity wastewater collection system,
a force main sewer system, driveways, and site
grading. A Drainage, Erosion and Sedimentation
(DES) plan was prepared for the project as required
by Park County. When it was determined that an onsite wastewater treatment plant package would not be allowed by the Colorado Department of Public
Health and Environment (CDPHE), Tetra Tech assisted
with design associated with the force main which
pumped wastewater to an existing treatment plant
approximately a mile away. Mr. Cross coordinated with
CDOT and the sanitation district to complete necessary
permitting.

CROSS (continued)

TOWN OF ATHERTON TETRA TECH
David Montalvo has experience in civil engineering design for municipal and private sector project including preparation of site plans, street improvements, and utility plans. David is also experienced in performing and developing maps and plans for topographic surveys and staking for various projects
Experience
Red Morton Park Stormwater Retrofit, City of Redwood City, CA.

Design Engineer. Mr. Montalvo performed engineering calculations to provide cost estimating for the various structures and appliances associated with the proposed site improvements for a multi-beneficial regional stormwater capture project at Red Morton Community Park in Redwood City. Tetra Tech conducted a topographic survey, comprised of ground survey and aerial photogrammetry, and performed detailed investigations of the site in order to allow the design team to understand above ground and potential subsurface constraints that may limit the project footprint. Tetra Tech is responsible for providing the PS&E for the construction of the 9-15 acre feet stormwater capture and treatment facility, as well as the site development necessary to rebuild affected work zone of Red Morton Park. Components to the stormwater treatment system include a pre-treatment, detention, and media filtration before returning the diverted water back to the San Francisco Bay via the reinforced concrete box channel that runs through Red Morton Park. Surface restoration options will include artificial turf, pervious pavers, and vegetative recirculation swales, and secondary treatment for irrigation.

Intel Site Accessibility Improvement Project, Intel, Cupertino, CA.

Design Engineer. Mr. Montalvo assisted in verifying and developing site improvements as deemed necessary by a preliminary site accessibility report provided by the client. Using AutoCAD Civil 3D, Mr. Montalvo analyzed existing topographic data to put forth improvements and recommendations to improve site accessibility. The project involved improvements of a Make-Up Air Handler Unit (MUA) at a computer chip masking facility in Santa Clara. Scope included collection of topographic survey data as well as preparing grading drainage and improvement plans for the MUA. Project included approximately 5,000 square feet of new infrastructure. Project was reviewed and approved by the City of Santa Clara.

CIVIL ENGINEERING
David Montalvo, EIT

EDUCATION
BS, Civil Engineering, San
Jose State University, San Jose,
CA, 2019

REGISTRATIONS/

CERTIFICATIONS
Engineer-in-Training:

California, No. 1988125

YEARS OF EXPERIENCE
6 TOWN OF ATHERTON TETRA TECH
First Street Slope Stabilization Project, City of Santa Ana, CA. Design Engineer. Mr. Montalvo provided
research to showcase various design alternatives
regarding the visual appeal of the proposed structure.

The undercrossing on East First Street, in the City of
Santa Ana, has slopes that are un-stabilized. Significant foot-traffic has caused the slopes to slowly deteriorate and become a NPDES issue. When it rains, sediment
erodes from the slopes, flows into adjacent storm
drains, and eventually into the City’s stormwater
lift station on the north side of First Street. This has increased maintenance requirements and the City
recently undertook a capital project to upgrade
the lift station. The project scope includes installing hardscape along the slopes to mitigate NPDES
issues and a stormwater BMP to help the City achieve
compliance with the requirements of the MS4 permit.

San Francisco ADA Ramps, Pacific Gas & Electric
(PG&E), San Francisco, CA. Design Engineer, Field
Assistant. Mr. Montalvo is responsible for topographic
surveying. Mr. Montalvo also aided in the drafting of
construction plans and design of ADA ramps and street
improvements through the use of AutoCAD Civil 3D.

Pacific Gas and Electric Company (PG&E) contracted
Tetra Tech through an existing Master Services
Agreement to perform Survey and Civil Design
Services on curb access ramps in San Francisco. This
work order was to support the ongoing work that
PG&E is undertaking in the City of San Francisco
where they intend to repair and replace all the existing medium pressure natural gas infrastructure. The City
of San Francisco has a master plan of all American with Disabilities Act (ADA) intersection ramp improvements
and has required that PG&E upgrade the intersections
that are affected by the natural gas line construction
work to insure they are ADA compliant. In support
of this effort, Tetra Tech has performed right-of-way
research, monument research, topographic survey,
and construction survey for a total of 284 ramps
on 204 different corners at 70 intersections in San
Francisco. In addition, Tetra Tech also prepared civil
site design improvement drawings for the purpose
of obtaining ADA ramp construction encroachment
permits with the City of San Francisco.

Survey Monumentation Preservation, Pacific
Gas & Electric (PG&E), San Francisco, CA. Field
Assistant. Pacific Gas and Electric Company (PG&E)
selected Tetra Tech to provide Survey Monument
Preservation Services for ongoing city-wide design
and construction projects in San Francisco, California.

The contract was issued as a blanket purchase order to
streamline requests for between 1 and 15 monuments
at a time. The projects involve perpetuating locations
for City and County of San Francisco (CCSF)
Monuments that fall within 20 feet of construction
zones. Tetra Tech supports PG&E in meeting stringent
CCSF protocols for accuracy and timely submission
of corner record documentation. Tetra Tech conducts
monument surveys and tracks survey dates, document
submission, construction schedules for post
construction verification of monument condition and
post-construction corner record submittals for CCSF.

Corridor Mapping Projects, Pacific Gas & Electric
(PG&E), CA. Design Engineer, Field Assistant. Mr.

Montalvo was responsible for performing topographic
surveys. Mr. Montalvo aided in drafting the maps
necessary utilizing AutoCAD Civil 3D. Need project(s)
description. Ex projects include Junipero Serra,
Keswick, Lucas Valley Road projects etc.)
Tree Disposal & Removal, CalRecycle, Oroville, CA.

Survey Assistant. Mr. Montalvo performed field surveys
in order to find and stake property and right-of-way
lines. This information was presented for use by project arborists to determine where a tree was located, and
whether the tree was to be removed or kept in place.

MONTALVO (continued)

TOWN OF ATHERTON TETRA TECH
Dan Helt is experienced in both civil engineering and land surveying aspects of construction and land development projects. He has designed and prepared both small and large federal, municipal, commercial, and residential grading and drainage plans, as well as utility plans and project associated public improvement plans. Mr. Helt has prepared a variety of hydrology and hydraulic documents for review of analysis and compliance with codes and standards. He has prepared and reviewed specifications, calculations and other basis of design documents.

Experience
Red Morton Park Stormwater Retrofit, City of Redwood City, CA.

Survey Project Manager. Mr. Helt oversaw survey services in support of this stormwater retrofit project at Red Morton Community Park in Redwood City. Tetra Tech conducted a topographic survey, comprised of ground survey and aerial photogrammetry, and performed detailed investigations of the site in order to allow the design team to understand above and below ground features. Existing site information and as-built engineering documents were compiled to create a detailed base map, that accurately depicts the above ground features, as well as the subsurface constraints and tie in points to the culvert running below Red Morton Park. The base map is controlled Horizontally and Vertically by Continuously Operating Reference Stations and GPS observations. Tetra Tech is also responsible for providing the plans, specifications, and estimate (PS&Es) for the construction of the 9-15 acre feet stormwater capture and treatment facility.

Aliso Creek – Limekiln Creek Restoration Project, City of Los Angeles Bureau of Engineering, Los Angeles, CA. Survey Manager. Mr. Helt oversaw survey services for this project, located at the confluence of the concrete lined Aliso and Limekiln Creek flood channels. The project improvements involve constructing several stormwater Best Management Practices (BMPs) intended to treat on-site and off-site runoff and reduce contamination in Aliso Creek, Limekiln Creek, and the Los Angeles River.

The proposed BMPs include low flow channel diversions, stormwater pump stations, stormwater pre-screening devices, bioswales, vegetated detention/retention basin, the restoration of upland, riparian habitat, and BMP educational signage. The goal of the project is to significantly reduce the pollutant loads, as well as transform a specifically built flood control facility into a multi-function green infrastructure facility. The project will also be designed to achieve a Platinum Envision Rating. This important water quality project is part of the City’s overall efforts through the Proposition O Bond Program to improve water quality and reduce pollutant loads that are currently being conveyed to the rivers, lakes, and oceans within the greater Los Angeles area.

SURVEY LEAD
Dan Helt, PE, PLS

EDUCATION
BS, Civil Engineering, Cal
Poly, San Luis Obispo, 2003

REGISTRATIONS/

CERTIFICATIONS
Professional Engineer:

California, No. C69347
Professional Land Surveyor:

California, No. 8925

YEARS OF EXPERIENCE
21 TOWN OF ATHERTON TETRA TECH
Caruthers Park Stormwater and Urban Runoff
Capture Project, City of Bellflower, CA. Survey
Manager. Mr. Helt oversaw survey services for this
Caltrans funded stormwater capture project. The
survey scope for this project included aerial and
ground based topographical survey. Analytical
aerotriangulation and stereo compilation was used to
create both planimetric and terrain data. The terrain
data was then used to generate 1-foot contours. A
ground survey supplemented the aerial acquired
topography, in order to collect additional data of
features not readily visible from the air. The Digital
Terrain Model of the ground and aerial surveys were
combined to eliminate redundancy, and an AutoCAD
Civil 3D file containing all data was produced. The
Caruthers Park Project consists of a gravity diversion
from two separate Los Angeles County Flood Control
District storm drain lines; a 72” RCP line that drains
261 acres of the Los Cerritos Channel, and a 38’ wide
rectangular concrete channel that drains 2,995 acres
of the Lower San Gabriel River. The diverted flows
pass through a pretreatment system to remove trash,
debris, and sediment. The runoff is then passed into
a large buried multi-chambered storage/infiltration
facility that will be treated and used to irrigate the park.

Flows in excess of the required irrigation demands
will pass into the infiltration gallery to be exfiltrated through the soil to eventually combine with the ground
water. It is anticipated that the system will use active controls to monitor the weather conditions and empty
the facility through a secured cloud-based system. This project will help the City comply with their bacteria
and metals TMDL, while providing additional benefits
of potable water offset and park revitalization.

Lower Colorado River Mapping and Sediment
Survey, Topobathymetric LiDAR, Multibeam, River
Restoration Organization, LLC for the US Bureau
of Reclamation Boulder City, NV. Technical Advisor.

Responsible for providing QA/QC of survey control
network including processing and adjustments. Tetra
Tech was contracted to provide bathymetric and aerial
LiDAR survey services to produce a high-quality digital elevation model (DEM) of the Lower Colorado River
from the international border with Mexico at river
mile 0 to river mile 342 at Hoover Dam. As part of this effort to support the Bureau of Reclamation, Tetra Tech performed an independent review of the bathymetric
LiDAR data to produce bathymetric “void” maps where
the LiDAR returns were either not required or not
expected to be accurate. Tetra Tech surveyed 1,887-
line miles of the Lower Colorado River.

Hermosa Beach Greenfield Infiltration Project, City
of Hermosa Beach, Hermosa Beach, CA. Survey
Manager. Mr. Helt oversaw survey services for a new
regional BMP facility to divert water from a major flood control storm drain and convey it to an underground
infiltration system. This project protects and improves Santa Monica Bay water quality by diverting and
infiltrating storm water that contains TMDL pollutants
fecal indicator bacteria, sediment-borne DDT and
PCBs, and trash, as well as typical pollutants in urban runoff (metals and nutrients). The proposed tributary
area to be mitigated by this project is 2,914 acres
including runoff from all cities in the Beach Cities
Watershed Management Group. Additional project
benefits include reducing downstream flooding,
preserving the existing use of the linear greenbelt as
a running path, restoring native coastal dune habitat,
and supporting loads associated with municipal
vehicles for parkland maintenance. The survey scope
of this project included aerial and ground based
topographical survey. Analytical aerotriangulation
and stereo compilation was used to create both
planimetric and terrain data. The terrain data was then used to generate 1-foot contours. A ground survey
supplemented the aerial acquired topography, in
order to collect additional data of features not readily visible from the air. The Digital Terrain Model of the
ground and aerial surveys were combined to eliminate
redundancy, and an AutoCAD Civil 3D file containing
all data was produced.

Urban Orchard Multi-Benefit Park and Green
Infrastructure Project, Trust for Public Land, South
Gate, CA. Survey Manager. Mr. Helt oversaw survey
services for this project that involves the diversion and pretreatment of dry- and wet-weather flows to irrigate
a community garden and wetland. Tetra Tech was
contracted to provide a feasibility study and plans,
specifications, and estimates for the construction of a 30-acre post-industrial site into a multi-benefit, green infrastructure park with recreational features along the Los Angeles River. Additionally, the project will explore the naturalization of the currently concrete Bandini
Channel that runs through the project area, as well as
opportunities to clean, infiltrate, and reuse stormwater onsite for possible irrigation of the urban orchard.

HELT (continued)

TOWN OF ATHERTON TETRA TECH
Mark Lawler is experienced in a variety of field survey and GIS applications.

He has participated in all aspects of control, construction, boundary, topographic and aerial control surveys including terrestrial LiDAR acquisition.

Mr. Lawler has ample experience with field survey preparation, logistics and execution and is responsible for geospatial data acquisition processing and quality control, project research, crew deployment and support as well as task oversight and tracking. He has experience working on projects for municipal, state and federal agencies in diverse areas such as real estate and cadastral, flood plain management, public health and safety, and resource management.

Experience
Bonita School Road Bridge Replacement Survey, Santa Barbara County Public Works, Santa Maria, CA. Survey Technician. Mr. Lawler was responsible for providing topographic survey of the Santa Maria River channel and surrounding surface-street Bonita School Road. Tetra Tech set 22 ground control targets, and tied those points to the Santa Maria Valley Control Network. Aerial photography was acquired and 18 color exposures at 1:2400 and 12 color exposures at 1:3600 were produced.

Analytical aerotriangulation and stereo compilation was used for density control and to create both planimetric and terrain data. The terrain data was then used to generate 1-foot contours. Additionally, Tetra Tech performed a ground survey to supplement the aerial acquired topography, in order to collect additional data of features not readily visible from the air.

The Digital Terrain Model of the ground and aerial surveys were combined to eliminate redundancy, and an AutoCAD Civil 3D file containing all data was produced.

Aliso Creek – Limekiln Creek Restoration Project, City of Los Angeles Bureau of Engineering, Los Angeles, CA. Survey Technician. Mr. Lawler provided field survey services for this stormwater improvement project, located at the confluence of the concrete lined Aliso and Limekiln Creek flood channels. The project improvements involve constructing several stormwater Best Management Practices (BMPs) intended to treat on-site and off-site runoff and reduce contamination in Aliso Creek, Limekiln Creek, and the Los Angeles River. The proposed BMPs include low flow channel diversions, stormwater pump stations, stormwater prescreening devices, bioswales, vegetated detention/retention basin, the restoration of upland, riparian habitat, and BMP educational signage. The goal of the project is to significantly reduce the pollutant loads, as well as transform a specifically built flood control facility into a multi-function green infrastructure facility. The project will also be designed to achieve a Platinum Envision Rating. This important water quality project is part of the City’s overall efforts through the Proposition O Bond Program to improve water quality and reduce pollutant loads that are currently being conveyed to the rivers, lakes, and oceans within the greater Los Angeles area.

SURVEY
Mark Lawler, LSIT

EDUCATION
MS, Geography, University of
New Mexico, Albuquerque,
2013
BA, Geography, Humboldt
State University, California,
2011

REGISTRATIONS/

CERTIFICATIONS
Licensed Surveyor in Training
California, No. 9311

YEARS OF EXPERIENCE
11 TOWN OF ATHERTON TETRA TECH
Upper San Gabriel River Enhanced Watershed
Management Plan, City of Industry, CA. Survey
Party Chief. Tetra Tech oversaw the development of
Preliminary Design Reports for seven multi-benefit
stormwater capture projects in an effort to implement
the Upper San Gabriel River (USGR) Enhanced
Watershed Management Program (EWMP) to address
water quality objectives for the region. A portion of
the project is aerial and ground based topographical
survey. Analytical aerotriangulation and stereo
compilation was used to create both planimetric and
terrain data. The terrain data was then used to generate 1-foot contours. A ground survey supplemented
the aerial acquired topography, in order to collect
additional data of features not readily visible from the air. The Digital Terrain Model of the ground and aerial surveys were combined to eliminate redundancy,
and an AutoCAD Civil 3D file containing all data
was produced. The goal of this project is to prepare
preliminary design reports which will include 30%
design level documents, and that could be utilized to
support grant funding application and/or supporting
information for a design-build solicitation package.

Caruthers Park Stormwater and Urban Runoff
Capture Project, City of Bellflower, CA. Survey
Party Chief. Tetra Tech provided pre-design and
design services for this Caltrans funded stormwater
capture project, including the necessary analyses to
provide a recommendation for regional stormwater
capture treatment and implementation. The analysis
identifies the existing site hydrology, water quality,
and hydraulics to determine an optimal combination
of the inflow rate, storage volume, and outflow. A
portion of the project is aerial and ground based
topographical survey. Analytical aerotriangulation
and stereo compilation was used to create both
planimetric and terrain data. The terrain data was then used to generate 1-foot contours. A ground survey
supplemented the aerial acquired topography, in
order to collect additional data of features not readily visible from the air. The Digital Terrain Model of the
ground and aerial surveys were combined to eliminate
redundancy, and an AutoCAD Civil 3D file containing
all data was produced. The Caruthers Park Project
consists of a gravity diversion from two separate Los
Angeles County Flood Control District storm drain
lines; a 72” RCP line that drains 261 acres of the
Los Cerritos Channel, and a 38’ wide rectangular
concrete channel that drains 2,995 acres of the Lower
San Gabriel River. The diverted flows pass through
a pretreatment system to remove trash, debris, and
sediment. The runoff is then passed into a large buried multi-chambered storage/infiltration facility that will be treated and used to irrigate the park. Flows in
excess of the required irrigation demands will pass
into the infiltration gallery to be exfiltrated through the soil to eventually combine with the ground water. It is anticipated that the system will use active controls to monitor the weather conditions and empty the facility
through a secured cloud-based system. This project
will help the City comply with their bacteria and metals TMDL, while providing additional benefits of potable
water offset and park revitalization.

Urban Orchard Multi-Benefit Park and Green
Infrastructure Project, Trust for Public Land, South
Gate, CA. Survey Party Chief. Tetra Tech provided a
feasibility study to transform a 30-acre post-industrial site into a multi-benefit, green infrastructure park with recreational features along the Los Angeles River.

A portion of the project is aerial and ground based
topographical survey. Analytical aerotriangulation
and stereo compilation was used to create both
planimetric and terrain data. The terrain data was then used to generate 1-foot contours. A ground survey
supplemented the aerial acquired topography, in
order to collect additional data of features not readily visible from the air. The Digital Terrain Model of the
ground and aerial surveys were combined to eliminate
redundancy, and an AutoCAD Civil 3D file containing
all data was produced. Additionally, the project will
explore the naturalization of the currently concrete
Bandini Channel that runs through the project area,
as well as opportunities to clean, infiltrate, and reuse stormwater onsite for possible irrigation of the urban
orchard.

LAWLER (continued)
Upper Atherton Creek Stabilization and Flood Mitigation Project Upper Atherton Creek Stabilization
and Flood Mitigation Project
REQUEST FOR QUALIFICATIONS and PROPOSALS
Professional Consulting Services for
1999 Harrison Street, Suite 500 | Oakland, CA | 94612