HomeMy WebLinkAboutStaff Report 13944
City of Palo Alto (ID # 13944)
City Council Staff Report
Meeting Date: 1/24/2022 Report Type: Consent Calendar
City of Palo Alto Page 1
Title: SECOND READING: Adopt a Park Improvement Ordinance for the
Replacement of the Palo Alto Flood Basin Tide Gate Structure in the City's
Baylands (FIRST READING: January 10, 2022 PASSED: 7-0)
From: City Manager
Lead Department: City Clerk
This was heard by the City Council on January 10, 2022 for a first reading and was approved 7-0.
No changes were made to the Ordinance; it is now before you for a second reading.
Attachments:
• Attachment A: Park Improvement Ordinance for Replacement of the Palo Alto Flood
Basin Tide Gate at Baylands
*NOT YET APPROVED*
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ORDINANCE NO. _____
Ordinance of The Council of The City of Palo Alto Approving
a Plan for Improvements to the
Palo Alto Flood Basin Tide Gate Structure as part of the
Palo Alto Flood Basin Tide Gate Structure Replacement Project
The Council of the City of Palo Alto does ORDAIN as follows:
SECTION 1. Findings. The City Council finds and declares that:
(a) Article VIII of the Charter of the City of Palo Alto and Section 22.08.005 of the Palo Alto
Municipal Code (PAMC) require that, before any substantial building, construction,
reconstruction or development is commenced or approved, upon or with respect to any land
held by the City for park purposes, the Council shall first cause to be prepared and by ordinance
approve and adopt a plan therefor.
(b) The Palo Alto Flood Basin Tide Gate Structure (Structure) is part of the Adobe Creek
Loop Trail (Trail). The Structure is located in the City’s Baylands, which is dedicated parkland
(See PAMC § 22.08.020 et seq.) Based on the Conditional Structural Assessment of the existing
Structure and reduced functionality, the Structure is planned to be replaced.
(c) The City of Palo Alto intends to authorize Santa Clara Valley Water District (Valley
Water) to construct a replacement Structure. The new Structure will replace the existing 1957-
built Structure which has outlived its intended service life and has been recommended for
replacement.
(d) The Plan of improvements shall comprise, as follows:
(1) The Project will construct a replacement Structure near the existing Structure,
and new levees to connect the Trail to the replacement Structure. The project will
re-align a portion of the levees and Trail as required to accommodate the
replacement Structure location. The existing Structure will be removed after the
replacement Structure and levees are constructed. Select plan sheets showing the
in-progress design are attached as Exhibit “A”.
(2) The Project will require temporary closures to portions of the Trail to
accommodate construction of the replacement Structure and connecting levee
work. A diagram illustrating anticipated Trail closures is attached as Exhibit “B”. If
the replacement Structure is not constructed, future degradation of the existing
Structure will occur and would eventually require closure of the Trail for an
unknown duration of time.
(3) The replacement Structure will include a dedicated concrete bay with motor
driven sluice gate solely for the City’s use of maintaining water quality within the
PAFB and controlling mosquito breeding. This new motor operated sluice gate will
replace the existing motor operated sluice gate which is owned and operated by
*NOT YET APPROVED*
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the City. The Structure will also include new water level sensors and Supervisory
Control and Data Acquisition (SCADA) system to improve flexibility and efficiency
for the City’s sluice gate operations. The new sluice gate will enable remote
operation of the sluice gate.
The replacement Structure with its improved operations and maintenance
features and improved hydraulic performance is anticipated to reduce mosquito
breeding within the PAFB compared to the existing conditions.
(e) The Project described above and as otherwise depicted in the attached exhibits is
consistent with recreation and conservation purposes
(f) The Council desires to approve the Plans for the Project described above and as
depicted in Exhibit "A" and Exhibit “B”.
SECTION 2. The Council hereby approves the Plan for construction of the Palo Alto
Flood Basin Tide Gate Structure Replacement Project as described in this Ordinance.
SECTION 3. Valley Water is the Lead Agency for the Project under the California
Environmental Quality Act (CEQA). Valley Water performed an Initial Study and determined
that a Mitigated Negative Declaration (MND) is the appropriate level of review. A resolution
adopting the Final MND (Resolution) was signed by Valley Water’s Board on April 27, 2021. The
Final MND and Resolution are available online from the project website:
https://www.valleywater.org/pafbtidegates. The City Council finds that the City of Palo Alto is
a responsible agency under CEQA for the Project and certifies that it has reviewed and
considered the information contained in Valley Water’s MND.
Valley Water has applied for regulatory permits from six resource agencies and are
currently working with the resource agencies for mitigation requirements and permit
conditions.
SECTION 4. This ordinance shall be effective on the thirty-first day after the date of its
adoption.
INTRODUCED:
PASSED:
AYES:
NOES:
ABSENT:
*NOT YET APPROVED*
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ABSTENTIONS:
ATTEST:
____________________________ ____________________________
City Clerk Mayor
APPROVED AS TO FORM: APPROVED:
____________________________ ____________________________
Deputy City Attorney City Manager
____________________________
Director of Community Services
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EXHIBIT A
PAGE 1 OF 4
EXHIBIT A
EXHIBIT A EXHIBIT A
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EXHIBIT A EXHIBIT A
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EXHIBIT A EXHIBIT A
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EXHIBIT B PAGE 1 OF 3
Dates above are tentative target dates subject to change pending project development and acquisition of all required project permits.
Year 1 Construction 9/1/2022 1/31/2023 5 months CLOSED CLOSED CLOSED CLOSED CLOSED
No Construction 2/1/2023 8/31/2023 7 months OPEN OPEN CLOSED OPEN OPEN
Year 2 Construction 9/1/2023 1/31/2024 5 months CLOSED CLOSED CLOSED CLOSED CLOSED
No Construction 2/1/2024 8/31/2024 7 months OPEN OPEN CLOSED OPEN OPEN
Year 3 Construction 9/1/2024 1/31/2025 5 months CLOSED CLOSED CLOSED CLOSED OPEN
No Construction 2/1/2025 8/31/2025 7 months OPEN OPEN OPEN OPEN OPEN
Year 4 Construction 9/1/2025 11/30/2025 3 months CLOSED CLOSED CLOSED CLOSED OPEN
Project completed 12/1/2025 Onward N/A OPEN OPEN OPEN OPEN OPEN
Total Cummulative Trail Closure Duration Per Trail Location = 21.5
months 21.5 months 35.5
months
21.5
months
13.5
months
Target Time Period Trail Location (See Map Below)
Activity Start End Duration Segment #1 Tide Gate Structure Segment #2 Segment #3 Segment #4
3.5
18 months 18 months 32 months 18 months 10 months
OTHER TRAIL
ROUTES & DETOUR
OPEN ALL THE TIME
Byxbee Park
Parking Lot
Emb
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EXISTING
TIDE GATE
STRUCTURE
TRAIL SEGMENT #1 TRAIL SEGMENT #2
TRAIL SEGMENT #3
TRAIL SEGMENT #4
CONSTRUCTION
SIGN
EXHIBIT B PAGE 2 OF 3
SIGN SIZE
4’ x 4’
48” x 48”
5’ x 3”
DETAIL - (TRUCK AND PEDESTRIAN USE)
12' TO 14'
Construction Sign for Palo Alto Flood Basin Project
EXHIBIT B PAGE 3 OF 3