GSP Annual Report
5-021.70 BUTTE
2025 (OCT. 2024 - SEP. 2025)
Single Annual Report
GSP Annual Report Information Comments
A Groundwater Extraction
Total Groundwater Extractions (AF)
160,300
Water Use Sectors
2,200
0
134,500
22,200
0
0
1,400
Rural Residential
B Groundwater Extraction Methods
Meters
2,300
Direct
5-10 %
Metered Municipal Wells
Metered connection maintained by City of Biggs and City of Gridley
Electrical Records
0
Land Use
134,500
Estimate
20-30 %
Land use estimates were derived from crop mapping and CropScape survey results
Typical uncertainty for water balance calculation
Groundwater Model
0
Other
1,400
Estimate
10-20 %
Rural residential groundwater extraction is estimated based on California Water Service Company's 2020 Urban Water Management Plan 2020 usage of an average per capita water use of 181 gallons per capita per day. Population data from the 2020 census was coupled with water district boundary data to identify total population not serviced by municipal supplies
Uncertainties are from population estimates and gallon per capita per day estimates
C Surface Water Supply
Total Surface Water Supply (AF)
815,900
Methods Used to Determine
Diversions for local supplies are estimated based on historic State Water Resource Control Board eWRIMS (Electronic Water Rights Information Management System) data for total diversions. Surface water delivery estimates are based on historic deliveries in the area that have occurred in dry and critical years
Water Source Types
0
0
0
815,900
0
0
0
0
D Total Water Use
Total Water Use (AF)
976,200
Methods Used to Determine
Methods used are a
combination of
estimates based on
land use and
population/ per
capita water use,
metered municipal
water use, and
estimates based on
historic water rights
data for dry and
critical years
Water Source Types
160,300
815,900
0
0
0
Water Use Sectors
2,200
0
857,000
115,600
0
0
1,400
Rural Residential
E Change in Storage
Method used to calculate change in storage
Theissen Polygon Method
F Monitoring Network Module
G PMA Module
PMA Implementation Updates Implementation Update Export (CSV) PMA Export (CSV)
| PMA ID | PMA Name | Lead GSA | Status | # Updates during WY |
|---|---|---|---|---|
| 5-021.70_PMA_1 | System modernization (Biggs-West Gridley Water District) | Biggs-West Gridley Water District GSA | Construction | 2 |
| 5-021.70_PMA_7 | Multi-benefit recharge | County of Butte GSA - Butte 1 | Ongoing (Status Unchanged) | 1 |
| 5-021.70_PMA_16 | Improve monitoring of surface water outflows and refine water balances to improve understanding of surface water/groundwater interactions/net recharge | County of Butte GSA - Butte 1 | No Update (Status Unchanged) | 1 |
| 5-021.70_PMA_21 | Monitoring well installation | County of Butte GSA - Butte 1 | Planning (Status Unchanged) | 1 |
| 5-021.70_PMA_14 | Facilitate financing of capital improvements for on-farm irrigation systems | County of Butte GSA - Butte 1 | Completed - Accruing Benefits (Status Unchanged) | 1 |
| 5-021.70_PMA_13 | Develop partnerships to implement project addressing regional water management | County of Butte GSA - Butte 1 | Planning (Status Unchanged) | 1 |
| 5-021.70_PMA_15 | Facilitate use of available recycled water that otherwise would not be used beneficially, meets all health and safety criteria, and does not harm crops or soils | County of Butte GSA - Butte 1 | No Update (Status Unchanged) | 1 |
| 5-021.70_PMA_8 | Grower education | County of Butte GSA - Butte 1 | Ongoing (Status Unchanged) | 1 |
| 5-021.70_PMA_9 | Installation of additional shallow monitoring wells | Western Canal Water District GSA | Planning (Status Unchanged) | 1 |
| 5-021.70_PMA_23 | Re-establish historical monitoring locations and identify new sites | County of Butte GSA - Butte 1 | No Update (Status Unchanged) | 1 |
| 5-021.70_PMA_4 | System Modernization (Western Canal Water District GSA) | Western Canal Water District GSA | Ongoing | 2 |
| 5-021.70_PMA_5 | Boundary flow and primary spill measurement (Western Canal Water District) | Western Canal Water District GSA | Completed - Benefits Fully Realized | 2 |
| 5-021.70_PMA_18 | Increase planned conjunctive use of surface water and groundwater within the supplier service area | Western Canal Water District GSA | Ongoing (Status Unchanged) | 1 |
| 5-021.70_PMA_19 | Little Butte Creek Reservoir main canal bypass project | Western Canal Water District GSA | Planning (Status Unchanged) | 1 |
| 5-021.70_PMA_2 | System modernization (Butte Water District) | Butte Water District GSA - Butte | Ongoing | 2 |
| 5-021.70_PMA_6 | Dual source irrigation systems | Butte Water District GSA - Butte | No Update (Status Unchanged) | 1 |
| 5-021.70_PMA_11 | Boundary flow and primary spill measurement (Butte Water District) | Butte Water District GSA - Butte | No Update (Status Unchanged) | 1 |
| 5-021.70_PMA_17 | Improved delivery service to pressurized irrigation systems | Butte Water District GSA - Butte | No Update (Status Unchanged) | 1 |
| 5-021.70_PMA_20 | M&T - Llano Seco fish screen project | Butte Water District GSA - Butte | Completed - Accruing Benefits (Status Unchanged) | 1 |
| 5-021.70_PMA_22 | Parrot Phelan Diversion restoration project | Butte Water District GSA - Butte | Planning (Status Unchanged) | 1 |
| 5-021.70_PMA_24 | Removal of bottlenecks on the Sutter-Butte main canal | Butte Water District GSA - Butte | No Update (Status Unchanged) | 1 |
| 5-021.70_PMA_3 | System modernization (Richvale Irrigation District) | Richvale Irrigation District GSA | Completed - Accruing Benefits | 2 |
| 5-021.70_PMA_10 | Alternate delivery to RID Secondary via Kelleher Dam | Richvale Irrigation District GSA | No Update (Status Unchanged) | 1 |
| 5-021.70_PMA_12 | Boundary flow and primary spill measurement (Richvale Irrigation District) | Richvale Irrigation District GSA | No Update (Status Unchanged) | 1 |
| 5-021.70_PMA_25 | Shu Fly/Cherokee Project | Richvale Irrigation District GSA | No Update (Status Unchanged) | 1 |
