Stage and Rain Gage at Dublin Creek
2 Documents in Project
Summary
SCH Number
2025080605
Public Agency
Zone 7 Water Agency
Document Title
Stage and Rain Gage at Dublin Creek
Document Type
NOE - Notice of Exemption
Received
Posted
8/14/2025
Document Description
New telemetered gage station positioned within the Zone 7 right-of-way along Dublin Creek. This gage will allow for stage and precipitation data to be collected and telemetered real-time into a Zone 7 data dashboard viewing website for the benefit of agency staff and the public.
The station will be equipped with the following: (2) pressure transducer (PT) probes for measuring stage; (1) tipping bucket instrument for measuring precipitation; datalogger and modem for data telemetry; a solar panel and 12-volt battery for powering the station; protective conduit for the 2 PT probes; mounting hardware equipment; an enclosure box for the instruments; galvanized pipe for mounts; crest stage gages; and staff plates. A tagline/pulley system for flow measurements will be installed 15-30 feet upstream of the staff plates with the static line above the top of bank elevation.
The mounting structure for the equipment enclosure box, solar panel and tipping bucket requires that the 2 galvanized pipe mounts be vertically set with concrete in manually dug footings with hole dimensions of 3-4 feet by 1-2 feet wide for each pipe. The (6) 1.5” galvanized pipe mounts for the staff plates and tagline/pulley system will be driven down into the channel bank to adequate depth with a gas-powered handheld post driver.
Once construction is complete, the station equipment will be installed within the equipment housing. Ongoing operations and maintenance of this station may require staff to enter the riparian corridor where the PT probes are placed; no impacts are expected from routine operations and maintenance.
The overall working footprint dimension for the structures is approximately 50 square feet. This project will have minimal/ no impact on baseline noise and riparian vegetation. The gas-powered post driver pounding into the pipe is expected to be the largest temporary noise contributor to the project, which may emit approximately 100 dBs of noise for 5-10 minutes at a time for mounting the (6) 1.5” galvanized pipes into the left and right banks of Dublin Creek. The protective conduit and staff plate post mountings were strategically chosen to avoid the removal of any riparian vegetation.
The target construction date is set for Fall 2025, and it will take approximately 3 days to construct the gage housing equipment, then approximately 2 days to install the gaging and telemeter equipment. Surveying and leveling the station will take 1 day.
Contact Information
Name
Elke Rank
Agency Name
Zone 7 Water Agency
Job Title
Senior Water Resource Planner
Contact Types
Lead/Public Agency / Project Applicant / Parties Undertaking Project
Phone
Email
Location
Coordinates
Cities
Dublin
Counties
Alameda
Regions
Citywide
Cross Streets
Dublin Creek (waterbody) near Amador Plaza Rd.
Zip
94551
Total Acres
<1
Jobs
1
State Highways
680
Railways
none
Airports
none
Schools
Foothill High, Dublin Adult School, Frederiksen Elm, Dublin High
Waterways
Dublin Creek, SAlamo Canal, Arroyo de la Laguna
Township
3S
Range
1W
Section
n/a
Base
MDBM
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
15301 Existing Facilities
Reasons for Exemption
None of the conditions noted under the California Environmental Quality Act (CEQA) Guidelines 15300.2 (as revised) will occur. Furthermore, this project will not result in potential for significant environmental impacts because:
• Work will be limited to the smallest footprint practicable.
• Only hand equipment will be used to install the gage and appurtenances.
• No vegetation will be removed as part of this project.
• No changes to the streambed or bank as part of this project.
• No impacts to sensitive habitat or wildlife are expected.
• There is not a reasonable possibility that the project could result in a significant impact.
County Clerk
Alameda
Attachments
Notice of Exemption
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