Interim Total Trash Capture Device (TTCD) Installation in Estudillo Canal to Comply with RWQCB MRP Section 10

SCH Number: 2018122038
Lead Agency: Alameda County
Document Title: Interim Total Trash Capture Device (TTCD) Installation in Estudillo Canal to Comply with RWQCB MRP Section 10
Document Type: NOD - Notice of Determination
Received: 2/8/2019

Document Description: The Alameda County Public Works Agency is implementing SF Bay RWQCB certified full capture systems of trash treatment control devices (TTCD) properly sized to trap particles 5mm and greater and trash debris in channel flows in the region specific 1-year, 1-hour design storm, without adverse hydraulic effects upstream. The TTCD will be Estudillo Canal between Washington Avenue and I-880 Freeway Northbound on/off ramp on Caltrans property. The TTCD will be installed on the bottom of the existing concrete lined rectangular channel. A 48' high concrete weir to direct trash debris laden low flows into the six linear trash treatment control devices will be constructed. The existing openings in the concrete flow restrictor walls downstream of the devices location will be enlarged to increase flow discharge to compensate for the potential hydraulic effects of the TTCD in the channel.

Contact Information: Jim Browne
Alameda County
399 Elmhurst Street
Hayward, CA 94544
540.640.5796

(1) The project will have a significant impact on the environment: No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA: No
(2b) A Negative Declaration was prepared for this project pursuant to the provisions of CEQA: Yes
(3) Mitigated measures were made a condition of the approval of the project: Yes
(4) A Statement of Overriding Considerations was adopted for this project: No
(5) Findings were made pursuant to the provisions of CEQA: No