1. Shasta Valley Groundwater Basin

2. Sustainable Groundwater Management Act (SGMA)
September 2014 – Governor Brown signs legislation requiring groundwater resources be managed by local agencies; referred to as Groundwater Sustainability Agencies (GSA)
SGMA establishes requirements for how groundwater basins will be managed and monitored over the long-term through the development and implementation of Groundwater Sustainability Plans (GSP) by GSA’s
GSP’s for critically overdrafted basins are due January 2020, & due January 2022 for high & medium priority basins

3. SGMA in brief 6 Undesirable Results that must assessed through GSP’s
Groundwater storage reduction
Chronic lowering of groundwater levels
Water quality degradation
Interconnected surface water depletion
Land subsidence
Seawater intrusion

4. Groundwater Sustainability Plan (GSP)
Multiple factors should be implemented into GSP’s to meet DWR requirements to determine:
Undesirable result triggers based on Minimum Thresholds
Gauge current and future groundwater conditions
Plan and manage for future sustainability.
By conducting projects, analysis, & models

5. Groundwater Sustainability Plan (GSP)
Tools include:
Gathering & considering current data & information, as well as future data collection
Developing groundwater & hydrogeologic conceptual model’s & water budgets – to assess current and future conditions
Developing sustainability criteria, minimum thresholds & measurable objectives
Developing monitoring programs, protocols & networks
Planning for and implementing future projects such as aquifer recharge, irrigation or water use efficiency, & water banking
If a basin is determined to be sustainable the GSP must outline how sustainability will be maintained
If it is determined that a basin is not sustainable in any of the six undesirable results, GSP’s must also include how sustainability will be achieve by 2042.

6. SGMA & residential use “de minimis” extractor
“means a person who extracts, for domestic purposes, two acre-feet or less per year”. – SGMA definition
– Measuring devices & reporting does not apply
10730 – A “GSA” shall not impose a fee pursuant to this subdivision on a de minimis extractor unless the agency has regulated the users pursuant to this part

7. Shasta Advisory Committee
Currently 7 committee members appointed by the Siskiyou County Flood Control District & Water Conservation District (GSA)
Duties include review, evaluate, and advise the GSA Board of Directors of all relevant aspects regarding GSP development
Information & data collection privacy important to the GSA
Initial meeting on 3/5, next meeting 6/4

8. Current boundary

10. Bulletin 118 How current line was determined Update 2020
Basin defined as “an aquifer or stacked series of aquifers with reasonably well-defined boundaries in a lateral direction, based on features that significantly impede groundwater flow, and a definable bottom”
Determined by DWR
GSA is only other agency that can initiate boundary line modification
Update 2020
“Groundwater basin boundaries…and any subsequent basin boundary modifications”
“Status of groundwater management efforts for areas not covered by SGMA…”

11. Shasta Valley Groundwater Basin Basin Boundary
Bill Ehorn, DWR, Northern Region office

12. Shasta Valley Groundwater Basin
DWR’s Bulletin 118 Basin Boundary
Water Agencies and CDFW Lands

13. k Scale Geology Map
DWR’s Bulletin 118 Basin Boundary

14. k Scale Geology Map
DWR’s Bulletin 118 Basin Boundary

15. k Scale Geology Map
DWR’s Bulletin 118 Basin Boundary

16. Bulletin 118 Basin Description - Excerpt

17. Bulletin 118 Basin Description - Excerpt

18. Groundwater is a Renewable Resource and CAN be Managed Sustainably
Questions or Comments?
Groundwater is a Renewable Resource and CAN be Managed Sustainably

20. Factors for the community to consider
Level of importance to being included in the GSP to the overall Shasta Valley community watershed supply sustainability
Level of importance to GSP assuring reliable & predictable irrigation & domestic water supplies
GSA through GSP development can utilize funding opportunities to improve monitoring network, improve management of irrigation resources, and seek out efficiency projects

21. Potential Results from boundary change
Inclusion in locally controlled plan, built on local knowledge, studies, & input
Reliable water availability knowledge & planning based on GSP
Recharge benefits – within basin boundary
Legislation language
Project & funding opportunities – Grant & GSP related projects can only apply within the basin boundary
Seat at table & input to GSA & GSP development
A “process” is in place to determine overdraft regions or negative groundwater supplies, & develop strategy to improve

22. Potential Results from boundary change
More regulation & oversight
Potential for additional fees, costs, etc…
Public process
Worst case scenarios around California - potential restrictions, shut-offs, or capping
Not expected in Siskiyou County
Potential data & access intrusion

23. Where would a new line make sense & how do you determine?
Known hydrologic conditions
Roadways
Soil type
Sub-region(s)
Land-use practices
Water-use practices

24. Boundary modification types
Scientific
Addition, deletion, or relocation based on the geological or hydrologic condition
Jurisdictional
Addition, deletion, or relocation that promotes sustainable groundwater management

25. Technical Needs
Any technical studies submitted must be from a published geologic or hydrologic report
Hydrology
Geology
Groundwater data collection
Current volunteer/CASGEM monitoring wells
Measures to determine potential new line

26. DWR Timeline Submittal period – Jan. 1, 2018 to June 30, 2018
Public comment period June 30 to July 30,
Draft modifications released – Fall 2018
Final modifications released – Fall/Winter 2018

27. Process to submit Public outreach & accompanying documentation - Now
Provide comment & subsequent recommendation to the GSA board of directors – Next
Information gathering & boundary line development
Public meetings regarding proposed draft line
GSA decision & approving resolution - June
Notify DWR by writing, of intent to modify
Submit in application any current technical reports, data, and hydroconceptual models
30-day public comment

28. Public comment GSA welcomes all comments from public Send to:
Letters/ of support or opposition
Technical submission to GSA
Send to:
Subject – Shasta Groundwater Basin Boundary
Final comment date: 3/30/18
Official comment during DWR review period (6/30-7/30)