SCH Number 2004041072


Project Info

Title
Carlson Marsh Regrade Project
Description
CDFG is executing a Lake or Streambed Alteration Agreement (Agreement) pursuant to Section 1602 (SAA # 1600-2004-0177-R5) of the Fish and Game Code to the project applicant, Mr. Gregory K. Herr, Irvine Ranch Water District. The applicant proposes to alter the streambed and banks throught the implementation of the Carlson Marsh Regrade Project. The project proposes the construction or modification of berms, weirs, and culverts, construction of low flow channels, removal of invasive vegetation, and restoration of riparian habitat within Carlson Marsh (Marsh). The modification and construction of these weirs, culverts and low flow channels will allow for circulation of water through the Marsh in the dry season, to drain ponded water after a storm event, and to control water supply within the marsh. Treated (polished) creek water from the seasonal ponds will be introduced at the northern portion of the Marsh and conveyed through low flow channels to the southern portion of the Marsh and then re-circulated to the northernmost seasonal pond. The circulation of water in the marsh during the summer will achieve the project objectives of promoting vector control, restoring historic hydrologic conditions, and providing permanent open water habitat for resident and migratory wildlife. The modification and construction of the berms will also provide additional freeboard for protection of adjacent facilities during the 100-year storm event and provide for operation and maintenance activity. Carlson Marsh encompasses approximately 60 acres of the northwestern portion of the 580-acre San Joaquin Marsh and extends from Michelson Drive south to McArthur Boulevard.
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3 documents in project

Type Lead/Public Agency Received Title
Irvine Ranch Water District Streambed Alteration Agreement for Notification No. 1600-2004-0177-R5, for the Proposed Carlson Marsh Regrade Project (Project) located in Carlson Marsh (within
Irvine Ranch Water District Carlson Marsh Regrade Project
Irvine Ranch Water District Carlson Marsh Regrade Project