HomeMy WebLinkAbout022123-03.1FINANCE COMMITTEE MEMORANDUM 3.1
TO: Mayor and Town Council February 21, 2023
SUBJECT: Authorize the Town Manager to execute a Professional Services
Agreement with O’Dell Engineering for green infrastructure design
services for the Diablo Vista Park Renovation Project, CIP No. B-560
BACKGROUND
The Town and other agencies countywide as a permittee of the Municipal Regional
Stormwater Permit (MRP), NPDES Permit No. CAS612008, Order No R2-2022-008, under
Provision C.3 shall implement or cause to be implemented, green infrastructure projects
within jurisdictions by June 30, 2027. The Towns numeric retrofit acreage requirement is
2.67 acres. The retrofit assignment is three acres per 50,000 population, prorated with a
minimum expectation of 0.20 acres and a maximum expectation of five areas. The
population data for the Town is from the 2019 U.S. Census Bureau Population Estimate.
This requirement can be achieved through an individual or countywide basis.
Diablo Vista Park and the Sycamore Valley Road Park and Ride (Park and Ride) green
infrastructure projects were identified as locations to implement these requirements. The
Park and Ride is currently near completion. The Diablo Vista Park improvements are
scheduled to be completed before 2024, which would allow the Town to meet its required
obligation prior to the June 30, 2027, deadline. This project will construct green
infrastructure improvements to treat storm water runoff from the existing north parking
lot adjacent to the existing play area project, coordinated in conjunction with the Diablo
Vista Park Renovation Project. The consultant’s proposal includes additional
topographic survey, geotechnical borings, and engineering and landscape design.
DISCUSSION
Capital Improvement Project Diablo Vista Park Capital Maintenance, CIP No. B-560
provides for the maintenance and improvements at Diablo Vista Park. On December 29,
2022, O’Dell Engineering submitted a proposal with a not to exceed budget of $29,205 to
provide green infrastructure design services. The proposal is included as Attachment A.
Consistent with the Town’s Purchasing Policy, the total not to exceed budget of $29,205
requires authorization from the Finance Committee. Sufficient funds have been
appropriated in the approved 2022/23 Capital Improvement Program for CIP B-560
(Attachment B) to cover the contract costs.
Finance Committee – GI Design
Development Services (CIP No. B-560) 2 February 7, 2022
It is recommended that the Finance Committee approve a contract not to exceed $29,205
to O’Dell Engineering for green infrastructure design services.
Prepared by:
Robert Russell
Landscape Architect
Reviewed by:
Tai J. Williams
Assistant Town Manager
LANDSCAPE ARCHITECTURE PROPOSAL
PROPOSAL
O’Dell Engineering
p:925-223-8340
6200 Stoneridge Mall Road, Suite 330, Pleasanton, CA 94588 |
www.odellengineering.com
1
Date: December 27, 2022
To: Bob Russell
Town of Danville
From: Karen Folsom
Re: Diablo Vista Park - Parking Lot Stormwater Management
Project Description
This proposal has been requested by the Town of Danville to incorporate the planned stormwater
management improvements for the Diablo Vista Park parking lot into the Diablo Vista Park Renovation
project. This additional service will be a change order to the original contract dated 10/26/2022.
The services required for this work include the site investigation work for the parking lot and area to the
west. This work includes topographic surveying and geotechnical investigation. These additional services
were completed while the crews were at the site performing work for the original project scope, in an
effort to eliminate additional site mobilization and reduce costs for the Town.
In addition, this proposal includes civil engineering and landscape architecture services for the additional
stormwater management areas requested to be included by the Town. These services are described
below, to be included with the bid package for the park.
Scope of Work
Task 1: Site Analysis/Data Collection & Review
Topographic Survey – Topographic surveying was added to the site survey completed the week of
11/28/22. Spot grades will be included of the top of curb and pavement grades, tree locations,
sidewalk grades and solar array post locations. See attached Exhibit A for additional area surveyed.
Geotechnical Investigation – To determine the potential infiltration rates at the open space to the
west of the parking lot area, Engeo drilled two borings, logged the subsurface conditions, and
performed percolation testing the week of 11/28/2022. The boring test holes were pre-soaked
overnight, and measurement of percolation rate was measured and documented the following day.
See Exhibit B for additional boring and testing locations.
ATTACHMENT A
PROPOSAL
O’Dell Engineering
p: 925-223-8340
6200 Stoneridge Mall Road, Suite 330, Pleasanton, CA 94588 |
www.odellengineering.com
2
Project Management – Includes meeting time, review of as-builts, and coordination with client and
subconsultants for this Phase.
TASK ONE FEES:
Topographic Survey $ 6,700.
Geotechnical Investigation and Report $ 3,300.
Project Management / Landscape Architecture $ 1,350.
Subtotal – Task One $11,350.
Task 2: Construction Documentation – The documentation for these additional areas will be included in
the submittal packages described in the original contract at 30%, 75% and 100%. Documentation will
indicate that this portion of work may be a Bid Alternate. See Exhibit C for the additional area to be
included in the set.
Civil Engineering–
Storm Water Management Plan
Prepare a Storm Water Management Plan (SWMP), per Town of Danville requirements consisting
of:
•Site Assessment
•Site Design
•Source Control Measure
•Treatment Control Measure
•Baseline Hydro Modification
•Full Hydro Modification
•Operations & Maintenance
•Implement storm water requirements into construction drawings
Construction Documentation
Prepare 1”=20’ scale drawings for construction. Plans will include:
•Demolition plan
•Grading and storm drain utility plan
•Inlet/outlet structures
•Details
•Erosion Control
Landscape Architecture –
Construction Documentation
Incorporate additional area for SWQ management into the overall set of construction documents,
including the following: .
•Include the additional area in the overall project scope.
•Add planting and irrigation improvements to these areas.
•Incorporate improvements in a harmonious manner considering adjacent pathways, skate
park and playground design components.
•Include language in specifications and plans that this work will be a bid alternate.
PROPOSAL
O’Dell Engineering
p: 925-223-8340
6200 Stoneridge Mall Road, Suite 330, Pleasanton, CA 94588 |
www.odellengineering.com
3
Project Management – Includes meeting time, review of as-builts, and coordination with client and
subconsultants for this Phase.
TASK TWO FEES:
Civil Engineering $12,010.
Landscape Architecture $ 5,845.
Subtotal – Task One $17,855.
TOTAL FEES: $29,205.
Limitations:
•The basin will be designed to treat only the storm runoff from the southern portion of the
parking lot
•Construction drawings will be made a part of the landscape architecture plan package
•Storm drain studies, or any hydrology/hydraulic studies beyond the existing parking lot is
excluded
•SWPPP/QSP is excluded
•Does not include structural calculations or design for walls, structures, pedestrian bridges, or
other site features.
•Does not include fees, permits, or processing of permits.
•Does not include utility trench and electrical design.
•Excludes providing additional consultation and coordination outside of the scope of work, as
requested by client. This may include meetings with the Client and agencies and assistance
with permitting etc.
•Participation in meetings or conference calls beyond listed in the scope of work will be billed
at hourly rates, per the attached fee schedule.
Note:
•Landscape architects are licensed by the State of California.
www.danville.ca.govCIP78
Projects
Updated description, eliminated funding for 2020/21 and added funding to 2024/25.
Provide for ongoing repair.Additional worker hours required to maintain per year:0
Additional Town direct operating costs per year:$0
This project has been modified from the previous year.
This project provides ongoing maintenance of Diablo Vista Park facilities including:
Ongoing: Major tree pruning Sports field and pathway lighting repairs Restroom maintenance - painting and repairs Cyclone fence and backstop repairs Fence painting and repairs Safety surface repairs Tennis/basketball court repairs Windscreen repairs/replacement
2020/21 Playground equipment replacement design
2022/23 Playground equipment replacement
Future Projects: Lighting replacement on soccer field (Phase I) Lighting replacement on baseball field (Phase II) Parking lot repairs and resurfacing
6/10/2020
2020/21Prior Years 2021/22 2022/23 2023/24 2024/25 TotalExpenditure Category
Capital Maintenance $718,000 $18,000 $18,000 $18,000$179,283 $951,283$0
Construction $25,000 $0 $0 $0$0 $25,000$0
$179,283 $0 $743,000 $18,000 $18,000 $18,000 $976,283Total Cost Estimate:$109,244Total Expenditure: Unexpended: $70,039 on 4-01-2020
2020/21Prior Years 2021/22 2022/23 2023/24 2024/25 TotalFunding Source(s)
LLAD Zone D $26,907 $0 $0 $0 $0 $26,907$0Park Facilities $152,376 $0 $18,000 $18,000 $18,000 $949,376$743,000
$179,283 $0 $743,000 $18,000 $18,000 $18,000 $976,283Total Funding:
www.danville.ca.gov
Projects
ATTACHMENT B