Third, Fourth, and I Avenue Storm Drain Rehabilitation Project (CP2015-05)

3 Documents in Project


SCH Number
Lead Agency
City of Coronado
Document Title
Third, Fourth, and I Avenue Storm Drain Rehabilitation Project (CP2015-05)
Document Type
NOD - Notice of Determination
Present Land Use
Unified Port of SD Port Master LU/WU, GP - I Avenue Row Z: Open Bay, Planning District 6, Coronado Bayfront
Document Description
The project proposes replacement of an existing 24-in storm drain outfall with a new 48-in storm drain outfall at the same location. The new outfall would carry both the drainage from the existing outfall as well as drainage from a new storm system along "I" Avenue intended to mitigate the existing flooding problems at the Fourth Ave/Alameda Blvd intersection. Inlets would be installed on the north and south side of Fourth Ave, on the east side of its intersection with "I" Ave. The new storm drain would run the length of "I" Ave from Fourth St to the San Diego Bay and would intercept the existing 24-in storm drain conveying flows from First St just prior to the existing point of discharge of the 24-in pipe. To handle the expanded peak flow capacity, the outlet to the Bay would be upsized from 24 in to 48 in. A low flow diverter would be installed within the storm drain system that would divert low-flows to the sanitary sewer system and not out the storm drain outfall. Additionally, energy dissipation is proposed at the outlet of the pipe to reduce potential displacement of sands into existing eelgrass beds. This would result in an additional 134 sf of riprap beyond the limit of the existing revetment slope. Placement of the dissipater apron would be matched to a similar area of removal of existing non-functioning rubble revetment to the north of the pipe outlet to ensure a no net expansion of rock placed on the beach. The rubble to be removed would be from the area adjacent to the Bay to provide a potential area for future eelgrass habitat.

Contact Information

Jim Newton
Agency Name
City of Coronado
Contact Types
Lead/Public Agency


San Diego
Cross Streets
3rd, 4th Streets and I Avenue
Total Acres
Parcel #
Right of Way
State Highways
SR 75, 282
Norht Island NAS Hasley Field
Coronado HS
San Diego Bay, Pacific Ocean

Notice of Determination

Approving Agency
City of Coronado
Approving Agency Role
Lead Agency
Approved On


(1) The project will have a significant impact on the environment
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
(3) Mitigated measures were made a condition of the approval of the project
(4) A mitigation reporting or monitoring plan was adopted for this project
(5) A Statement of Overriding Considerations was adopted for this project
(6) Findings were made pursuant to the provisions of CEQA

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613.

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