HomeMy WebLinkAbout03.e. Report on Levee Improvement Project with the County Flood Control District Page 1 of 5 Item 3.e. CENTRAL SAN November 18, 2019 TO: REAL ESTATE, ENVIRONMENTAL AND PLANNING COMMITTEE FROM: DANEA GEMMELL, PLANNING AND DEVELOPMENT SERVICES DIVISION MANAGER REVIEWED BY: JEAN-MARC PETIT, DIRECTOR OF ENGINEERING AND TECHNICAL SERVICES ROGER S. BAILEY, GENERAL MANAGER SUBJECT: RECEIVE REPORT ON LEVEE IMPROVEMENT PROJECT WITH THE CONTRA COSTA COUNTY FLOOD CONTROL DISTRICT At the September 19, 2019 Board Meeting, the Board requested a staff report on the joint Flood Control Levee Improvement Project. Staff will review the attached presentation during the meeting. Strategic Plan re-In GOAL FIVE: Maintain a Reliable Infrastructure Strategy 1 - Manage assets optimally throughout their lifecycle ATTACHMENTS: 1. Presentation November 18, 2019 Special REEP Committee Meeting Agenda Packet- Page 23 of 71 Page 2 of 5 FLOOD CONTROL y CENTRAL SAN'S WALNUT CREEK/GRAYSON CREEK LEVEE REHABILITATION PROJECT --- Danea Gemmell Planning & Development Services Division Manager Real Estate, Environmental and Planning Committee November 18, 2019 ORIST NET M.1 PURPOSE • Raise the height of the levees surrounding the treatment plant for flood protection up to a 500-year storm event December 31, 2005: Storm estimated at 39-year wet-weather event Aw - 7-A z CFNTPAL SAN � November 18, 2019 Special REEP Committee Meeting Agenda Packet- Page 24 of 71 1 Page 3 of 5 HISTORY Interim Project 2007 • Raise the height of the levees , surrounding the treatment plant for flood protection up to a 100- year storm event with one-foot freeboard • Desilt lower Walnut Creek along treatment plant r 3 HISTORY • April 4, 2013: Position Paper to adopt Resolution 2013-008 accepting the Integrated Regional Water Management Plan and authorizing executing other related documents as may be necessary to acquire and process grant funding • June 20, 2013: Board Announcement that County did not receive the grant funding • July 16, 2013: Presentation to Enterprise Committee regarding LCounty's request to jointly fund the project .1 million each, including in-kind value of$450,000 for storing 15,000 ubic Yards import borrow material for levee raising November 18, 2019 Special REEP Committee Meeting Agenda Packet- Page 25 of 71 2 Page 4 of 5 BUDGET Walnut Creek/Grayson Creek Levee Rehabilitation, District Project 7341 was established to capture Central San labor costs, soil testing, or other direct charges. • Project Budget: $1,100,000 • Allocated-to-date: $ 100,000 • Expenditures to-date*: $ 76,527 "Does not include value of import borrow material L2 IMPORT BORROW MATERIAL • 23,700 Cubic Yards from J&J Ranch subdivision in Orinda via Bay Cities Paving & Grading I November 18, 2019 Special REEP Committee Meeting Agenda Packet- Page 26 of 71 3 Page 5 of 5 SCHEDULE ' - - mr, -Mq=MMWF, Planning January 2013 August 2013 Design August 2013 June 2015 Bid Delayed due to funding and Lower Walnut Creek Restoration Project Construction April 2021 October 2021 IFI 7 CF.NTPAt.SAN November 18, 2019 Special REEP Committee Meeting Agenda Packet- Page 27 of 71 4