License Agreement for Stream Gauge Monitoring in Martinez
Summary
SCH Number
2024090443
Public Agency
Contra Costa County Flood Control District
Document Title
License Agreement for Stream Gauge Monitoring in Martinez
Document Type
NOE - Notice of Exemption
Received
Posted
9/12/2024
Document Description
The Contra Costa County Flood Control and Water Conservation District will enter into a License Agreement with the City of Martinez to install equipment to collect and analyze stream level data on Alhambra Creek (also known as Arroyo del Hombre) to assess the creek’s hydraulic capacity. The project consists of installing a radar-based stream gauge sensor (non-water contact) and associated small equipment at the Ward Street bridge. In addition, one small in-stream water depth sensor will be installed downstream near the Marina Vista Avenue bridge to collect wintertime stream level data. The sensor will be housed in a narrow-perforated metal pipe that will be mounted to an approximately 4-foot-long steel bar driven into the stream bed in a discreet location. A second identical sensor will be installed out of the water nearby as an atmospheric pressure reference. The installation will be done by manual labor and hand tools. Work is anticipated to occur by October 2024 and take approximately one day. Temporary traffic control and tree and vegetation trimming may be necessary. The in-stream sensor will be accessed periodically, at least once a year, to retrieve the data it collects.
Contact Information
Name
Alex Nattkemper
Agency Name
Contra Costa County Public Works Department
Job Title
Environmental Analyst
Contact Types
Project Applicant
Phone
Location
Coordinates
Cities
Martinez
Counties
Contra Costa
Regions
Citywide
Cross Streets
Ward and Estudillo Streets, Marina Vista Avenue and Castro Street
Zip
94553
Parcel #
373-193-017, 373-270-002
State Highways
Hwy 4, I-680
Railways
Union Pacific, BNSF
Airports
N/A
Schools
Martinez Junior High, Alhambra High, John Muir Elementary
Waterways
Alhambra Creek, Merle Creek, Peyton Creek, Peyton Slough, Carquinez Strait
Township
2N
Range
3W
Section
13
Base
MtDiablo
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Article 19, Sections 15303 and 15306
Reasons for Exemption
The activity consists of installing small new equipment for stream data collection which does not result in a significant disturbance to an environmental resource.
County Clerk
Contra Costa
Attachments
Notice of Exemption
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