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

3 Documents in Project

Summary

SCH Number
2015101070
Lead Agency
Coronado, City of (City of Coronado)
Document Title
Third, Fourth, and I Avenue Storm Drain Rehabilitation Project (CP2015-05)
Document Type
NOD - Notice of Determination
Received
Posted
2/3/2016
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
City of Coronado
1825 Strand Way
Coronado, CA 92118

Phone : (619) 522-7326

Location

Coordinates
32°41'52"N 117°5'59"W
Cities
Coronado
Counties
San Diego
Cross Streets
3rd, 4th Streets and I Avenue
Zip
92118
Total Acres
2.5
Parcel #
Right of Way
State Highways
SR 75, 282
Railways
Coronado
Airports
Norht Island NAS Hasley Field
Schools
Coronado HS
Waterways
San Diego Bay, Pacific Ocean

Notice of Determination

Approving Agency
City of Coronado
Approving Agency Role
Lead Agency
Approved On
Final Environmental Document Available at
1825 Strand Way, Coronado, CA

Determinations

(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
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
N/A
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
Yes
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