Installation and Operation of Temescal Wash Stream Gage – Corona South


SCH Number
Public Agency
California Department of Water Resources (DWR)
Document Title
Installation and Operation of Temescal Wash Stream Gage – Corona South
Document Type
NOE - Notice of Exemption
Document Description
Under the hydrological data collection objective of the Sustainable Groundwater Management Act (SGMA), the Department of Water Resources proposes to deploy a network of stream gages in high and medium priority groundwater basins to reduce data gaps in the existing stream gage network. The improved network would provide essential data needed to improve water management and to help protect fish and wildlife. The proposed station will monitor water levels in the Temescal Wash and collect data for analysis of groundwater recharge and flooding in the basin.

Contact Information

Albert Lu
Agency Name
Contact Types
Lead/Public Agency


Citywide, Countywide, Statewide
Cross Streets
Temescal Canyon Rd & Cajalco Road
Total Acres

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Categorical Exemption Information Collection, Class 6, 15306, Title 14 CCR
Reasons for Exemption
A list of special status plant and wildlife species with the potential to occur within the project area has been compiled based on a literature search of the California Department of Fish and Wildlife’s (CDFW) California Natural Diversity Database (CNDDB). A Field survey was conducted to identify potential biological resources within the project vicinity and determined a minimal probability of special status species on the proposed Project site. The nearby encompassing area has the potential to serve as suboptimal habitat for Vireo bellii pusillus, Empidonax traillii, Empidonax traillii extimus, Polioptila californica californica, and Bombus croutchii. Most of the proposed activities would take place on developed portions of the drainage. The conduit may lay across a mixture of invasive Bromes and thistles (Salsola tragus, Centaurea solstitialis) well as some typical wetland/riparian plants like Baccharis salicifolia, Encelia farinosa, Artemisia californica, and Lotus scoparius in the streambed, but no existing native vegetation would be removed. The installation of the stream gage would not significantly disturb the local ecology. No large machinery equipment would be utilized, and ground disturbance would be minimal. The proposed construction activities would take place outside of nesting season (February 15 to September 15) to mitigate impact to the local and migratory bird population. Impacts to plants, wildlife, or cultural resources would be minimal. There would be minimal impact to the streambed and streambank in the Temescal Wash. Therefore, no environmental regulatory permits would be required.
County Clerk


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