Carlson Marsh Regrade Project
3 Documents in Project
Summary
SCH Number
2004041072
Lead Agency
Irvine Ranch Water District
Document Title
Carlson Marsh Regrade Project
Document Type
NOD - Notice of Determination
Received
Posted
7/13/2004
Present Land Use
Open Space and Preservation
Document Description
The project proposes to remove exotic vegetation and construct or modify weirs and culverts at several locations to allow for circulation of water through Carlson Marsh in the dry season, and to drain ponded water after a storm event. Water supplied to the northern portion of Carlson Marsh will be distributed throughout the marsh through a system of weirs, culverts, and low flow channels. Weirs and culverts will be constructed to collect water in the northeastern portion of the marsh. During the dry season, polished creek water will be introduced at the northern portion of the marsh and conveyed through the low flow channels to the southern portion of the marsh. Water will be recirculated to the northernmost seasonal pond via the proposed weir and culvert and will not pass through the culvert under Campus Drive (to UCNRS). The circulation of water in the marsh during the summer will achieve the project objectives of promoting vector control and restoring historic hydrologic conditions. The circulation of water in the summer will also provide permanent open water habitats for resident and migratory wildlife. The weirs and culverts will be similar in design and operation to the existing structures in the marsh.
Contact Information
Name
Gregory K. Herr
Agency Name
Irvine Ranch Water District
Contact Types
Lead/Public Agency
Phone
Location
Cities
Irvine
Counties
Orange
Cross Streets
Campus Drive and Carlson Drive
Total Acres
~7.25
State Highways
405
Airports
John Wane
Waterways
San Diego Creek
Notice of Determination
Approving Agency
Irvine Ranch Water District
Approving Agency Role
Lead Agency
Approved On
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 Mitigated or 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
N/A
(6) Findings were made pursuant to the provisions of CEQA
N/A
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 state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.