CITY COUNCIL AGENDA ITEM NO.
Meeting Date: March 26, 2002
Subject/Title: Amendment to Condition of Approval Related to Drainage Area 52C Storm Line A Improvements for Tentative Map No. 7605, Garin Ranch by Signature Homes
Submitted by: Engineering: B. Grewal /B. Bornstein
Approved by: John Stevenson, City Manager
Approve the following amendments to condition 50 “Phase IV-Improvements, Item f.” on Tentative Subdivision Map No. 7605:
1. Signature Homes will construct Storm Line A from it’s existing terminus at the Wastewater Treatment Plant southerly across Sunset Road and crossing the EBMUD Molelumne Aqueducts and terminating at the Northeast corner of the Stolich property, for future extension when this property develops. Signature Homes will be reimbursed for this extension of Storm Line A to the Stolich property by Contra Costa County Flood Control District (CCCFCD), up to the amount available from Drainage Area 52C fees which is estimated at $420,000.
2. Signature Homes shall coordinate with William Lyon Homes to construct the segment of Storm Line A from the southeasterly boundary of William Lyon Homes property to the existing detention basin #1 on the southwest corner of Sellers Avenue and Chestnut Street to the satisfaction of the City Engineer and CCCFCD.
3. Signature Homes will be required to construct the Non-Potable Waterline and Fiber Optic Line from the Wastewater Treatment Plant to the existing detention basin #1 as indicated on the Storm Line A improvement plans. These improvements will begin at the existing terminus of Line A at the Wastewater Treatment Plant and continue southerly down to the existing detention basin #1 on the southwest corner of Sellers Avenue and Chestnut Street. Signature Homes will be reimbursed for this work through Water Enterprise Funds for the Non-potable water line and through Roadway Facility funds for the fiber optic line. This work must be completed by August 1, 2002.
4. If, due to heavy story events that exceed the capacity of the existing detention basin #1, Signature Homes shall be responsible for operating and maintaining an emergency backup system, until such time as Storm Line A is completely constructed to Marsh Creek.
On March 17, 1992, by Resolution No. 92-04, the City Council approved Tentative Subdivision Map No. 7605.
On May 5, 1992, the Planning Commission Amended Tentative Subdivision Map No. 7605, with conditions.
On May 17, 1994, the Planning Commission Amended Tentative Subdivision Map No. 7605, with conditions.
On September 19, 1995, the Planning Commission Amended Tentative Subdivision Map No. 7605, with conditions.
On September 8, 1998, the City Council approved by minute order amendments to condition number 50 on Tentative Subdivision Map No. 7605.
Condition of Approval number 50 “Phase IV – Improvements, f” is as follows:
“Storm Drains – Complete Basin, install outfall trunk line to March Creek”
The Garin Ranch subdivisions have been burdened with constructing several large infrastructure facilities as part of their development. Among these are Balfour Road from Highway 4 easterly to Sellers Avenue, the Highway 4/Balfour Road and railroad intersection, the Sellers Avenue off-site sewer line, and detention basin #1 as required by Drainage Area 52C. These improvements have been financed by facility fee credits, reimbursement agreements, benefit districts, and drainage area fees. Signature Properties fronted the cash to install the Sellers sewer and approximately 2.5 million dollars will eventually be reimbursed to Signature Homes through the benefit district. Signature Homes has already spent over a million dollars in drainage area improvements including the detention basin #1.
Garin Ranch development has been saddled with an abundance of large storm drain infrastructure needs. A portion of these infrastructure costs have been financed by Signature Homes and will be paid back over time through a drainage area fee credits/reimbursement agreement between the developer and CCCFCD. Total construction cost of Storm Line A is estimated to be $3,500,000. Being a sub regional drainage facility, cost of these improvements are fee creditable/reimbursable through CCFCD, DA-52C funds. At this time, funds available in the DA-52C funds are in the amount of $420,000. The remaining funding required to complete Storm Line A will not be available until the remaining undeveloped properties in DA-52C are developed. Therefore, it seems logical to have Signature construct the first segment of Storm Line A across EBMUD. Then, when William Lyon Homes (Yamanaka Property) develops to the south, they will be required to complete the section within their subdivision boundaries and coordinate with Signature to install the section south of their project to tie into the existing detention basin #1, as part of their off-site improvements for the extension of Oak Street to Sellers Avenue. Therefore, the only section of Line A not completed is along the Stolich and Tamballini Properties. Once these properties develop, they will be required to construct Storm Line A through their respective properties. The existing detention basin #1 has only been pumped out once during the big storms of 1997, and with the connection built between detention basins #1 and #2, this will serve as a release for overflow of basin #1. If basin #2 exceeds its capacity, the storm water can be drained through the ECCID canal and ultimately drain to the proposed termination of the Storm Line A south of EBMUD on the Stolich Property.
The non-potable waterline is a part of the Master Planned Facilities and is an integral part of the operation of the new wastewater treatment plant operations. This line needs to be installed before the end of this summer when the treatment plant is planning to be fully operational. By requiring Signature Homes to complete this construction by August 1, 2002, the City will be able to use this line in conjunction with other NPW line improvements along Sellers Avenue to be done by Signature Homes (again) for transmission of tertiary treated water for much needed irrigating landscaping and golf courses purposes.
The funds for the drainage improvements for this project are provided by the developer and Contra Costa County Flood Control District drainage area funds. The Non-potable water improvements are funded by the Water Enterprise Funds. The Fiber Optic improvements are funded from Roadway Facility Fees.