City Council / Board of Public Utilities
Liaison Subcommittee
April 28, 2022
Peter Martin
Deputy Director, Water Resources
Santa Rosa Water
Proposed Wheeling of Recycled Water in
Geysers Recycled Water Delivery Pipeline
2 Laguna Treatment Plant
& Regional Water
Reuse System
1970 – 1980
• Summer discharge prohibited
• City of Santa Rosa begins recycled water
ir
rigation program at the Laguna
Treatment Plant
• City develops irrigation system and
ut
ilizes local farms and Rohnert Park
urban customers to beneficially reuse
new water supply for irrigation
3 Regional Water Reuse
System Challenges
1980 – 1990s
• Flows to LTP were increasing
• 1985/86 – Un authorized discharge occurs
• City issued a building moratorium
• NPDES Requirements tighten for discharges
• Must find a weather independent, long-term
so
lution to minimize/eliminate discharge
• Multiple feasibility studies conducted
4 Geysers Project
1990s – 2000s
• Geysers Geothermal Recharge Project
an
d partnership is identified as preferred
option for weather independent reuse
option
• Design and construction of 41 miles of
pipeline
• ~$
220M Investment by Regional
Pa
rtners and initial $85M by Calpine
• Operation begins in 2003 – 11 MGD
average delivery
• Several turnouts were constructed for
po
tential expanded use in region
5 Incremental Recycled Water Master Plan
Projections
YEAR
4,500
MG
2,200
MG7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
2005 2010 2015 2020
ANNUAL SUPPLY VOLUME (MG)
5,000
4,000
3,000
2,000
1,000
6,000
0 8,900
12,600
Reclamation – 1,900 MG
Geysers – 4,000 MG
10,500
6,400
7,600
9,500
Recent Recycled Water Deliveries
6 Location
Average
(BG)
2021
(BG)
Geysers 4.2 4.0
Ag Irrigation 1.7 0.6
Urban Irrigation 0.4 0.4
Discharge 0.4 -
Total 6.7 4.1
7 Geysers Project Operations
Today
• Contract has performance requirements
fo
r Santa Rosa
• Monetary and pumping cost
co
ntributions by Calpine
• About 2/3 of recycled water is sent to
st
eamfields annually
• Lowest cost, weather-i ndependent,
water reuse option for Santa Rosa and
regional partners
8 Pumping Operations for
Geysers Pipeline
• Llano pump station conveys water 30
mile
s to buried tank at Bear Canyon
• Three pump stations pu mp in series to
convey water from Bear Canyon to the
Terminal tank at Calpine’s steam fields
9 Jackson Family Wines Project
Proposal
• Staff have been approached about use of
ex
cess delivery capacity in Geysers Pipeline
• Delivery at Eastside Road in Windsor is along
Gey
sers Pipeline Alignment
• In Town of Windsor’s Recycled Water Service
Ar
ea
• Windsor has a connection to Geysers Pipeline
fo
r disposal of their recycled water
• Discussed “wheeling agreement” between
thr
ee parties
10 Existing Turn-out
Proposed Point of
Connection
Existing Turn-out
Proposed Point of
Connection
Geysers
Pipeline
12 Windsor
Reclamation
Facility
13 Wheeling Agreement - Considerations
Three Party Agreement
• City of Santa Rosa, Town of Windsor,
Ja
ckson Family Wines (JFW)
Policy Considerations
• Allow third-pa rty access to Regional Water
Reuse infrastructure?
• Regional project of significance?
• Full recovery of costs for wheeling?
14 Wheeling Agreement - Considerations
Existing Geysers Project contract through 2037
• Wheeling Agreement Contract term
• Recommending no longer than 10 years
• Include delivery interruptions related to
Gey
sers Project operations
• Scheduled maintenance, power shutdowns,
emer
gencies
15 Wheeling Agreement - Considerations
Turnout to JFW
• Ownership beyond turnout
• Pressure differential
• Operational responsibility
Recycled water supplies are fully allocated
• No use of Santa Rosa recycled water for project
• Geysers/Ag desire more water in future
Accounting: JFW Demands vs Windsor Supply
• Metered use / truing up
• Scheduling – Winds or responsible
• Physical mechanisms to prevent overuse
16 Wheeling Agreement - Considerations
Environmental / Right of Way
• CEQA – Lead agency determination
r
equired before agreement
• Right of Way – Pipe line is in County of
Sonoma easement
• Encroachment Permits
17 Feedback / Recommendations
Seeking recommendations and feedback from City Council / Board of Public Utilities Liaison Subcommittee on the following:
• Whether to proceed with developing agreement with Town of Wind
sor and Jackson Family Wines
• Feedback or recommendations on outlined considerations for a po
tential wheeling agreement
• Anything else to consider/evaluate?
18 Next steps
• If directed, will return to City Council / BPU Liaison Subcommittee in c
oming months and provide:
• Status Updates
• Refined inputs for further direction from subcommittee • Outreach to recycled water stakeholders
• Work with Board of Public Utilities and City Council to pursue a fo
rmal agreement