Section 401 Water Quality Certification - Final Letters

Section 401 WQC - Program

The following Section 401 Water Quality Certification (WQC) actions have been issued within the previous 60 days. *

DATE OF ISSUANCE
APPLICANT
PROJECT
ACTION
05/29/2026 Newhall Land & Farming Company Newhall Land & Farming Company, Proposed Resource Management and Development Plan and Spineflower Conservation Plan, Santa Clarita,
Los Angeles County		 Signed Amendment
05/29/2026 Metropolitan Water District of Southern California West Valley Feeder No. 2 Exposed Pipe Project Signed NOA
05/26/2026 City of Oxnard City of Oxnard Seawall Foundation Repairs WQC Signed
05/20/2026 Southern California Regional Rail Authority Arroyo Seco Bridge Deck Replacement WQC Signed
05/18/2026 Port of Long Beach Berth G234 and Pier G South Slip Fill Project Signed Amendment
05/11/20266 Los Angeles World Airports LAX Terminal 5 Renovation – Argo Ditch Crossing WQC Made Active Under General Order
04/30/2026 Southern California Edison WO801872992 Sierra Highway Tower Leg Repair Project WQC Signed
04/27/2026 City of Rancho
Palos Verdes		 Portuguese Bend Landslide Complex Emergency Mitigation (RGP 63) NOA Signed
04/21/2026 Jay Greenwood Malibu Ranch 1501 Decker School Lane Redevelopment Project WQC Made Active Under General Order
04/20/2026 The City of Ventura – Public Works Moon Ditch Culvert Replacement Project WQC Signed
04/15/2026 Los Angeles County Flood Control District Eaton Wash Dam Inlet Works Emergency Restoration Project (NOI) WQC Made Active Under General Order
04/10/2026 City of San Buenaventura Promenade Repair and Improvements Project WQC Signed
04/09/2026 LA Railroad 93, LLC Shadowbox Studios Project WQC Signed
04/06/2026 City of San Buenaventura Santa Paula Branch Line Railes with Trails (NOI) WQC Made Active Under General Order
DATE OF ISSUANCE
APPLICANT
PROJECT
ACTION

Click here for past 401 Final Letters

Please contact Snejana Toneva at (213) 576-7159. Any petitions for the appeal of a Section 401 WQC action must be filed within 30 days of the date of its issuance.

* This list will be updated as documents become available (approximately 3 days from date of issuance).

401 Certification Contacts: