.

AGENDA Groundwater Sustainability Agency Advisory Committee Meeting Date/Time: February 12, 2019 I 3:00 p.m. – 5:30 p.m. Location: Valley of the Moon Water District Office, 19039 Bay Street, El Verano Contact: Ann DuBay, Sonoma County Water Agency, SVGSA Administrator Email: [email protected] Phone: (707) 524-8378 Time Agenda Item Materials Welcome and roll call – Call to Order – Roll Call and Introductions 3:00 Fred Allebach, Advisory Committee Chairman Tim Parker, Advisory Committee Meeting Facilitator General Public Comments This time is reserved for the public to address the Committee about matters NOT on the agenda and within the jurisdiction of the Committee. Agenda and 2019 Meeting Schedule Planning and Review Meeting Agenda 3:10 Fred Allebach, Advisory Committee Chairman and 2019 Schedule Tim Parker, Advisory Committee Meeting Facilitator 3:15 Review Action Items and Approval of Previous Meeting Summary Meeting Summary Ad Hoc Goal and Ad Hoc for Recommendations for Well Permits in Depletion Areas 3:20 Tasks Stormwater Scoping Study and Stormwater Resource Plan – Susan Staff report 3:30 Haydon and Kent Gylfe, Sonoma Water Objective: Provide overview of stormwater work in basin Sonoma Valley flow/Seepage Measurements - Steve Lee, 4:15 Sonoma Center Objective: Provide overview of seepage measurements in basin and how it is used for understanding surface water-groundwater connections Groundwater Sustainability Plan - Basin Setting – Hydrogeologic HCM Narrative and 4:45 Conceptual Model, Current and Historical Groundwater Conditions Figures - Handout Marcus Trotta, Sonoma Water . Hydrogeologic Conceptual Model – Initial Narrative and Figures Current and Historical Groundwater Conditions Overview – Initial Narrative and Figures Objective: Discuss approach and concepts, proposed narrative and figures, and receive Advisory Committee input. Updates Legislative and 5:15 Ann DuBay, Administrator Administrative . Recent GSA Board Activity Update . Reminder - Form 700s due to county (look for email from Darin Bartow) Marcus Trotta, Technical Staff . Recent GSA Technical Work . Basin Reprioritization Objective: Administrator and Plan Manager briefly provide relevant updates that inform Advisory Committee discussions. 5:25 Review Meeting Action Items and Ask For Any Closing Comments th 5:30 Meeting Adjourns – Next Meeting Date March 12

Sonoma Valley Groundwater Sustainability Agency Board and Advisory Committee Meeting Schedule

SVGSA Board Advisory Committee 2019 January 28 January 8 Stormwater Capture & Recycled Water use in Sonoma Valley Groundwater Recharge Hydrogeologic Conceptual Model and Current and Historical Groundwater Conditions – Draft Subsection Components February 12 Stormwater Capture/GW Recharge Seepage Monitoring (Sonoma Ecology Center) Discussion of Surface Water – Groundwater Interactions Hydrogeologic Conceptual Model – Narrative and Figures Current and Historical Groundwater Conditions – Narrative and Figures March 25 March 12 Aquifer Storage and Groundwater Markets – Mammoth Trading & EDF (invited) Recovery Hydrogeologic Conceptual Model and Current and Historical Groundwater Conditions – Draft Subsection Water Budget Requirements Overview Groundwater Flow Model Overview April/May All-GSA Workshop: Climate Change & Groundwater Sustainability • GSP requirements regarding climate change • Local implications of climate change on groundwater and surface water • How this information will be incorporated into GSPs May 20 May 14 Joint Board/Advisory Hydrogeologic Conceptual Model and Current and Historical Committee field trip: Groundwater Conditions – Revised Subsections Eastside Sonoma Aquifer Storage and Recovery pumping depression Water Budget Components Model Scenarios for Water Budget July 22 July 9? Agricultural & Urban Water Budget - Draft Subsection Water Conservation Management Areas Discussion advances and Sustainability Indicators for the Basin – Initial Discussion technologies Early Fall: Public Workshop on Sonoma Valley GSP and Basin Conditions • What defines the Basin? • Communities • Water sources • Areas of concern • SGMAs ‘six deadly sins’ and how they are defined, determined, and what other areas are doing about them

SVGSA Meeting Schedule 1/2 v02-05-2019

Sonoma Valley Groundwater Sustainability Agency Board and Advisory Committee Meeting Schedule September 23 September 10? Introduction to Review Draft Basin Setting Section Sustainable Management Areas Discussion Management Criteria Sustainable Management Criteria Introduction and Considerations for defining Undesirable Results Sustainability Indicators for the Basin October 8? Sustainable Management Criteria Sustainability Indicators for the Basin November 25 November 12? Sustainable Management Criteria Sustainability Indicators for the Basin

SVGSA Meeting Schedule 2/2 v02-05-2019 Sonoma Valley Groundwater Sustainability Agency Advisory Committee Meeting MEETING SUMMARY - DRAFT

Meeting date/time: January 8, 2019 I 3:00 p.m. – 5:30 p.m. Location: Valley of the Moon Water District Office, 19039 Bay Street, El Verano Contact: Ann DuBay, Sonoma Valley GSA Administrator Email: [email protected] Phone: (707) 524-8378

MEETING RECAP • Fred Allebach, SVGSA Advisory Committee Chair, welcomed all attendees and kicked off the SVGSA Advisory Committee meeting. • The meeting agenda and schedule were reviewed. • The previous meeting summary for November 2018 was approved unanimously by Advisory Committee Members to finalize and post, with Matt Stornetta and Greg Carr abstaining because they were not present at the November meeting. • Kevin Booker, Deputy Chief Engineer, Sonoma Water, provided an overview of Sonoma Valley recycled water. • Marcus Trotta, Sonoma Water, provided an overview of the figures that will be provided in SV Groundwater Sustainability Plan Area and Basin Setting sections. • Brief Plan Manager and Legislative Updates were provided.

SUMMARY OF ACTION ITEMS Action Item Responsible Deadline Party 1) Post November meeting summary as final on Staff Jan. 2019 website, with clarification noted on well permitting request 2) Review calendars and let staff know if AC Jan. 2019 proposed dates for July-December create any Members conflicts 3) Bring back to AC a recommended process for Staff Feb. 2019 discussing well permitting issues 4) Provide ideas regarding well permitting to AC Feb. 2019 staff Members 5) Provide feedback on figures within 2 weeks AC Jan. 22, 2019 Members 6) Provide links to SRP rate/fee study documents Staff Jan. 2019 7) Provide link to public review draft Staff Jan. 2019 Water Plan Update 2018

Next Meeting: February 12, 2019, 3:00 p.m. – 5:30 p.m., Valley of the Moon Water District

Sonoma County Groundwater Website: http://www.sonomagroundwater.org/

SVGSA AC January Meeting Summary 1 1-18-2019

MEETING SUMMARY Roll Call, Public Comment The public was provided an opportunity for comment at the beginning of the meeting. There were no public comments.

Agenda and Meeting Schedule Review The Advisory Committee reviewed the meeting agenda, and updated meeting schedule, which developed through a planning meeting of the chair, vice-chair, and staff where they jointly identified a number of topics that would be of interest to the AC, and that will provide background for the GSP.

Question regarding who is hosting the climate change model workshop. It will be jointly sponsored by all three GSAs; USGS has done a lot of the work.

Question regarding sustainability criteria, why has it slipped? It’s important for AC to be involved and useful in the process. This is an area that the AC could help make decisions, and would like to see it earlier. Staff acknowledges that this would be helpful, and that the full AC will need to be informed and have a good understanding before starting to have discussions and making decisions on minimum thresholds and other management criteria. There may be some components that can be brought into earlier meetings (currently scheduled to begin discussion in July).

Question regarding DWR’s possible change of priority, and how it could change the GSP deadlines. Staff replied that SV is currently medium priority and is recommended to be changed to high. This won’t change the deadline for GSP submission date of January 31, 2022. Staff noted that the DWR changed methodology and had more data to look at basins. Staff did not necessarily agree with the data; the SVGSA submitted comments and last week DWR released final prioritization, and is taking into consideration the local data as the SV is now listed as pending. On a related note, the Anderson Valley and Healdsburg Area basins were back to very low priority. The final prioritization addressing the “pending” basins including the SV will be provided by DWR in late Spring 2019.

Approval of November Meeting Summary The AC commented that the Advisory Committee did not request a change from ministerial to discretionary permitting but requested a hydro report for ministerial permits in areas of concern within the basin. Staff verified that this was correct and will modify the November Meeting Summary to clarify this point.

The AC noted that possible changes to ministerial permitting as discussed above should continue to be discussed; AC members might be useful in assisting with this.

SVGSA AC January Meeting Summary 2 1-18-2019

Perhaps a small committee (work group) could be created to help address this. The AC asked a question regarding authority of the AC to change planning policy. Staff noted that the AC could make recommendations to the SVGSA Board, and the SVGSA Board could make recommendations to the Sonoma County Board of Supervisors for consideration.

The AC discussed the role of the AC and whether it should pursue this direction for recommendations to changes in well permitting. The AC also discussed that well permits are issued with no use identified. This could be a problem in the future if the person who is drilling a well comes in and wants to build a winery. It would be helpful to have an upfront explanation. This might be a useful trigger for a well permit.

The AC asked what is the mechanism for spending time on issues that aren’t directly related to development of the GSP? If the AC has conversations earlier, it might help resolve some of the contentious items earlier. Staff noted that the AC has the ability to create an ad hoc. Also, since some of this is related to GSP, it’s being memorialized in notes.

AC raised question as to whether this is an ad hoc item, since so many people are interested in it. An ad hoc could flesh out options and summarize and discuss with full committee. An Ad Hoc cannot comprise the entire AC. ACTION: Staff is going to think about options regarding well permitting, and bring ideas/recommendations to the AC at its February meeting.

ACTION ITEM REVIEW: All Action Items were completed.

ADVISORY COMMITTEE ACTION: The previous meeting summary for November 2018 was approved unanimously by Advisory Committee Members to finalize and post, with Matt Stornetta and Greg Carr abstaining because they were not present at the November meeting.

ACTION: Staff to finalize and post the November meeting summary on the SVGSA website.

Recycled Water in Sonoma Valley, Kevin Booker, Deputy Chief Engineer, Sonoma Water Kevin Booker provided an overview of the Sonoma Valley County Sanitation District (SVCSD) recycled water program. Sonoma Water has an overall approach to optimize five sources of water: surface water, groundwater, recycled water, stormwater and conservation water.

The SVCSD plant treats wastewater to a tertiary level. In addition to the treatment plant storage of 800 acre-feet (AF), recycled water users have about 1,000 AF of storage. SVCSD has a “peaking factor” that is about 4 times average daily flow. 4.2

SVGSA AC January Meeting Summary 3 1-18-2019

million gallons per day (MGD) is, on average, treated in the plant, but the treatment capacity of the plant is 16 MGD. The average dry weather flow is 2.6 MGD. The peaking factor allows for big storms, when there is a lot of water coming into the system. During really big storms, when more than 16 MGD comes into plant, the wastewater is stored onsite and then treated. The district serves around 40,000 people (10,000 connections).

Is the dry flow only wastewater? Theoretically, the dry water flow is only coming from connections. However, there is always some leaking into the system.

What are the old pipes made of? Clay, with rubber joints that typically leak, more so with age.

As the pipes are fixed, the water becomes run-off and can be recharged. Kevin noted that the District will never contract to provide 100% of estimated recycled water produced, since it can vary based on drought. Kevin noted that contractors’ needs are variable: they don’t always take what they need, and sometimes want more than their contract allocation.

How long will the Napa salt ponds restoration require recycled water from SVCSD? The salt ponds will likely take recycled water for 8-10 years. We started delivering it in the beginning of 2018. SVCSD will need to start planning what to do with that available recycled water once the salt pond is restored.

What’s next: Recycled water that is currently going to the salt ponds will be available in 8-10 years, and will be available November-April. This means that the recycled water will likely go to those agricultural users who have storage reservoirs. The SVCSD is starting to look at this.

Will the plant need to be augmented to treat wastewater for population growth? Not sure -- depends on assumptions regarding conservation.

Will there be water available to augment GW supplies in the future? When salt ponds restoration is completed, there will likely be recycled water available but not clear if regulations will allow for recycled water to be used for groundwater recharge. Staff noted that monitoring costs, etc., would be high. If recharge is by surface infiltration, clay soils become an issue; if injection, then might need to do additional treatment. Key would be to have storage for users who need recycled water for irrigation and would stop using groundwater for irrigation.

Is there a social stigma in using recycled water? Depends on where you are and the timing.

Is there a mechanism for prioritizing users?

SVGSA AC January Meeting Summary 4 1-18-2019

Currently, it’s the rate you pay (users who pay a premium never get cut off; and other ratepayers can get cut).

Would it be financially any different if we were to fix leaks (rather than build new storage) and use that water for recharge? Recharge can be challenging – it doesn’t always work.

Public Questions: What is the winter peak flow? Has seen flows in excess of 21-22 MGD, and can store it on site.

Groundwater Sustainability Plan - Basin Setting – Hydrogeologic Conceptual Model and Current and Historical Groundwater Conditions – Marcus Trotta, Principal Hydrogeologist, Sonoma Water Marcus Trotta used PowerPoint slides to cover the new figures that will be provided in the Plan Area Section and the Basin Setting Sections. He noted that the next two subsections of Groundwater Sustainability Plan will be available for review and comments at the February meeting. Marcus handed the new set of figures to the AC.

Summary of Marcus’ and Advisory Committee comments: • Draft Figure 2-6B: Only includes production water wells, not monitoring or cathodic protection. • The AC noted that more than ½ the new wells permitted in basin recently are in depleted area, and that this seems to vary from what Permit Sonoma indicated at a previous meeting. • Draft Figures 3-2A & B are rough and will be put into better format, and noted that surface soil is a lot of clay and that the soil conductivity maps show Carriger Creek and Glen Ellen areas might be better suited to recharge. • Draft Figures 3-3 and cross sections are being worked on by USGS, and because of federal government shut-down, not a lot of work has been done recently. There are definite differences between shallow and deeper aquifers; because basin is geologically so complex, we are looking to qualify the systems based on shallower or deeper (see PowerPoint slide for more detail). Deeper has thin layers of sands and gravels, separated by thick layers of clay. • Draft cross section C-C’ shows wells within a couple hundred feet of a cross section of the valley. Noted that clay separates the deeper and shallower aquifer systems. • Simpler draft cross section C-C’ screens out a lot of the noise, and includes water quality. Discussion about the Eastside fault and whether it forms a barrier, a partial barrier, and noted geothermal influences with warmer water temperature and chemistry. • Question regarding geothermal resources. Mapping done in early 80s; can be pretty shallow, but also deeper. Found hotter water in wells in city and in springs areas.

SVGSA AC January Meeting Summary 5 1-18-2019

• Discussed Stiff diagrams, which show the proportional concentration of sodium, phosphate, calcium, sulfur, magnesium in the groundwater. This creates a mineral signature. • Draft Figure 3-9 Data comes from Basin Characterization Model, USGS 2014. Precipitation varies a lot in watershed. • Draft Figure 3-10 used General Vallejo site data, and used PRISM data to fill in the gaps. PRISM data pretty accurately tracks observed. Identified dry and wet periods, which will help when looking at GW level data (can help distinguish changes due to weather versus demands). • Draft Figure 3-11a shows that GW generally flows from hills into the valley for shallow aquifer system. • Draft Figure 3-11b shows flows in deeper system. Question regarding faults and how they impact GW depressions. • Draft Figure 3-12 show that most of the shallow wells are generally stable (exceptions are an El Verano well). Deeper wells in the southeast of city and El Verano show declining levels. Note that an area that started getting recycled water to offset GW pumping led to pretty quick recovery of declining well levels. The AC noted that shallow aquifers are stable over time (but can vary a lot seasonally). • Draft Figure 3-17 was created by DWR and The Nature Conservancy. Need to ground truth this and compare with GW levels (if GW levels are far below ground surface, then the vegetation isn’t likely to be GW-dependent). This information will come into play when designing the monitoring system and establishing thresholds. The AC noted that seepage run data will feed into this.

Rate/Fee study final report Ann DuBay provided an update on rate/fee study final report and on the SRP study. AC members requested that information on the SRP study be provided to them, as it sets a precedent for the future rate/fee in Sonoma Valley.

Plan Manager and Legislative Update Marcus provided plan manager update: • Technical Support Services approved and working on agreement • Sonoma Water on behalf of the GSAs made a request and DWR approved support for shallow monitoring well installations along • DWR grant agreement finalized and signed, so reimbursements should start

Legislative highlight: • Not clear of the water priorities of new governor, except that he is supportive of a Cal Water fix (but at a reduced scale). • SB 19, Dodd, increased stream gaging statewide; bill died last year because it didn’t get funded. • California Water Plan Update 2018 is out (draft). Worth taking a look at this.

SVGSA AC January Meeting Summary 6 1-18-2019 PUBLIC COMMENT No further public comment received.

MEETING ATTENDEES Advisory Committee Members

Fred Allebach Norman Gilroy Jim Bundschu Ken Johnson Helge Bruckner Craig Lichty Greg Carr Matt Stornetta Caitlin Cornwall Staff Ann DuBay, SVGSA Administrator Marcus Trotta, Sonoma Water Andy Rich, Sonoma Water Tim Parker, Facilitator, Parker Groundwater

SVGSA AC January Meeting Summary 7 1-18-2019 Sonoma Valley Groundwater Sustainability Agency Advisory Committee

Draft Proposed Ad Hoc to Evaluate Well Permitting Options in Depletion and Saline Water Areas of Sonoma Valley

Goal: Consider policy and technical options for additional requirements/information to be submitted under a ministerial well permit in the Sonoma Valley areas of groundwater depletion

Tasks: Conduct 3 to 4 Ad Hoc meetings, some with Permit Sonoma Permit staff to discuss: • Issue statement • Overview of well installation information in Sonoma Valley, depletion and saline water areas • Possible policy and technical options to address issue, including pros and cons of each option • Permit Sonoma input on options identified • Recommendations for Advisory Committee consideration

Outcomes: Working with SVGSA Staff, prepare short narrative report covering Ad Hoc Tasks

Schedule: Report back to SVGSA Advisory Committee on May 14, 2019

SVGSA AC Ad Hoc – Well Permitting 1 v02052019 Sonoma Valley Groundwater Sustainability Agency Advisory Committee

Reference: Five Year Review and Update Report, SVGMP March 2014

SVGSA AC Ad Hoc – Well Permitting 2 v02052019 Sonoma Valley Groundwater Sustainability Agency Advisory Committee

Reference: Five Year Review and Update Report, SVGMP March 2014

SVGSA AC Ad Hoc – Well Permitting 3 v02052019

Sonoma Valley Groundwater Sustainability Agency

TO: Advisory Committee FROM: Susan Haydon and Kent Gylfe, Sonoma Water SUBJECT: Overview of the Sonoma Valley Storm Water Resources Plan and Storm Water Capture/Groundwater Recharge Projects

Summary: This item will provide information on the recently completed Southern Sonoma County Storm Water Resources Plan (SWRP) covering the Sonoma Valley and past studies on capturing storm water to help recharge groundwater.

Storm Water Management and Groundwater Recharge Initiative In 2010, in three of its flood zones, Sonoma Water identified opportunities to alleviate flooding, while possibly recharging groundwater aquifers or providing other benefits. The “Storm Water Management-Groundwater Recharge Initiative” began with scoping studies to study existing conditions and identify multiple benefit concepts for storm water management for the purposes of addressing water supply and flood management concerns. These scoping studies were performed and serve as a foundation to beginning feasibility studies for potential projects in Laguna-Mark West watershed, the Sonoma Valley watershed and the Upper watershed. Initiative goals: The goal of the initial scoping studies (one in each watershed) was to establish project objectives, identify potential project concepts, and determine, at a preliminary level, the technical and practical feasibility of projects that would reduce flooding while providing additional community benefits. These benefits included groundwater recharge, water quality improvements, water supply improvements, improved ecosystem functions, preservation of agricultural land use, preservation or enhancement of open spaces, system sustainability or benefits like recreation, public access or education. To accomplish this goal, consultants in each watershed collected and assessed technical data and information, and met with active stakeholders (including the Sonoma Valley Basin Advisory Panel and Technical Advisory Committee) to discuss project objectives and goals and to solicit ideas on potential projects. Findings: In Sonoma Valley, the areas identified as having the greatest potential for effective capture of storm water and groundwater recharge were upper Sonoma Creek (Kenwood vicinity), upper Nathanson Creek and the City of Sonoma, and portions of the valley floor in and around the El Verano to Agua Caliente communities. Several tools were identified as potentially effective methods of capturing storm water and recharging groundwater, including detention/recharge basins (both on

1

and off streams), high-flow diversion/recharge projects, flood plain attenuation, above-ground or underground storage/recharge tanks, infiltration/detention gallery and low-impact development. On-the-ground challenges: In follow-up to the studies, Sonoma Water applied for and received a Proposition 1E grant to develop a multi-benefit storm water detention project on Fryer Creek, in the City of Sonoma. The project, which was a partnership with the Sonoma County Agricultural Preservation and Open Space District, the Sonoma Ecology Center and the City, would have created a detention basin in an existing grazed pasture (with an open space easement) and reduced downstream flooding. Neighborhood opposition and limited recharge capability at the detention basin site resulted in the project focus moving to upper Nathanson Creek on another public site, county owned vacant field near Veterans Memorial building, with a detention occurring via an underground gallery. This project also met with public opposition over potential loss of future above-ground uses. This project would have reduced flooding downtown, however the project was dropped due to public opposition and moved to Petaluma River watershed where a worthy flood reduction project was funded and is now being implemented. Lessons learned: • Additional education/community collaboration is needed. Projects throughout California have been stymied by public opposition. Concerns include possible increased public access, a change to a familiar landscape, a misunderstanding of what detention basins are and what they look like, the creation of habitat that could encourage mosquito-breeding, and disruption during construction. Re-use or redevelopment of sites for multiple uses are often met with scrutiny and lack of acceptance based on changes in community needs and outdated land use policies or plans. • Recharge is challenging in Sonoma Valley. The area’s complex geology requires potentially costly drilling and technical work to determine the feasibility of a project. The complex geology may also limit the benefits of passive recharge projects (inundating fields and detention basins). Background: Southern Sonoma County Storm Water Resource Plan & Storm Water Management and Groundwater Recharge Initiative Sonoma County’s weather is characterized by rainy periods (generally October through March), followed by long, dry months. This Mediterranean climate makes Sonoma County a great place to live, farm and enjoy the outdoors – but can create flooding and water supply challenges. Large, heavy winter storms often inundate creeks and streams, flooding local communities. Periodic droughts can stress groundwater and surface water resources. Capturing storm water when it’s available can both lessen flood impacts and recharge groundwater supplies. For nearly a decade, Sonoma Water and partners have been working on initiatives to better capture storm water to provide multiple community benefits, including groundwater recharge. This informational item highlights two of these initiatives: 1. The recently finalized Southern Sonoma County Storm Water Resources Plan; and 2. The Sonoma Valley Storm Water Management and Groundwater Recharge Initiative 2

Southern Sonoma County Resource Plan Purpose of the Plan: Pursuant to Senate Bill 985, a collaborative, stakeholder driven and watershed based planning process was initiated -- the Southern Sonoma County Resource Plan -- to identify and prioritize multi-benefit projects that capture and treat storm water. Projects identified in the Resource Plan, which covers both Sonoma Creek and Petaluma River watersheds, are eligible for state Proposition 1 implementation funding through the State Water Resources Board’s Storm Water Grant Program. Sonoma Water (the lead agency) was the recipient of Proposition 1 planning grant funds from the Storm Water Grant Program to develop the Resource Plan. As part of the State’s approval process, the Resource Plan has been incorporated in the Bay Area Integrated Regional Water Management Plan, making the projects eligible for consideration for state funding. Projects Identified: In the Resource Plan, 62 multiple benefit projects have been identified by a variety of agencies, organizations and stakeholder groups. One-half of the projects identified are in the Sonoma Creek watershed. These multiple benefit storm water projects must be identified in a collaborative and science-based plan in order to be eligible for state funding. Benefits must be quantified based on shared data and agreed upon metrics. Projects are defined as both programmatic and “in-the-ground” projects. Attachment 1 shows identified projects. The Resource Plan identified and prioritized storm water and dry weather runoff capture projects for implementation. Resource Projects were evaluated using agreed upon criteria and a metrics-based quantitative analysis of multiple benefits types including: water supply, water quality, flood management, environmental, and other community benefits (recreation, educational, etc.). The Plan is statutorily and categorically exempt from complying with the California Environmental Quality Act. The Resource Plan uses measurable factors to identify, quantify, and prioritize storm water and dry weather runoff capture projects. Resource Projects will be prioritized through a collaborative process with stakeholders using decision support tools provided by the State Water Resources Control Board. Collaboration and Partnerships: Preparing the Resource Plan for Southern Sonoma watersheds required a collaborative effort among diverse interests. Sonoma Water convened a Technical Advisory Committee of 13 stakeholders and collaborating entities for the Resource Plan. Participating entities include: Sonoma Water, State Water Resources Control Board, Area Regional Water Quality Control Board, Sonoma County Agricultural and Open Space District, Sonoma County Regional Parks, Permit Sonoma, City of Petaluma, City of Sonoma, Valley of the Moon Water District, Sonoma Resource Conservation District, Sonoma Ecology Center, Daily Acts, Sonoma Land Trust, North Bay Agricultural Alliance, and Friends of the Petaluma River. The Technical Advisory Committee was charged with approving the process and reviewing the draft Plan and products, quantification methodology, analyzing data, advising on the Resource Plan, community outreach and facilitating public input, and suggesting projects for Resource Plan inclusion, and prioritizing projects for implementation. In addition to multiple Technical Advisory Committee meetings a public meeting was held during the planning process. Public input was solicited on the identification of projects and the Draft Resource Plans.

3

The Resource Plan is one of 28 plans funded under the Proposition 1 Storm Water Planning Grant Program. From this funding, Sonoma Water (the lead agency) was granted $484,627 by the State for the development of the Resource Plan. Field Investigations: As part of the planning grant, Sonoma Water contracted with Environmental Science Associates & Todd Groundwater to perform limited field investigations to determine subsurface conditions associated with a few of the proposed project sites in both watersheds and to assist in the development of the Resource Plan. Contact Susan Haydon, Sonoma Water, (707) 547-1937, [email protected] Kent Gylfe, Sonoma water, (707) 547-1977, [email protected]

4 Attachment: Stormwater Presentation Meeting Date: February 13, 2019

5. Quantitative Methodologies And Identification and Prioritization of Projects

1 Basin 5 13 Swales/Filter strips

Capture for use 16 1 Channel 6 modification or creation Land management alteration 4 8 Landscape alteration 2 22

Note: Number within each pie slice indicates the total number of projects for each management action type Figure 15 Southern Sonoma SWRP Projects by Management Action Type

TABLE 22 SOUTHERN SONOMA SWRP PROJECTS

Main Project Management ID Watershed Project Name Project Source Action Type

Petaluma River Corona Reach Linear Overflow 1 Petaluma City of Petaluma Basin Channel Channel 2 Petaluma Washington Creek Enhancement City of Petaluma modification or creation 3 Petaluma Kelly Creek Enhancements City of Petaluma Basin 4 Petaluma Willow Brook Flood Detention Basin City of Petaluma Basin Adobe Creek Floodplain Management and Sonoma Resource 5 Petaluma Study Sediment Study Conservation District Lichau Creek Rainwater Catchment and Sonoma Resource 6 Petaluma Capture for use Pond Conservation District King Creek Wetland Development and Riparian Sonoma Resource 7 Petaluma Basin Enhancement Conservation District Multi-Benefit Conservation Plan Implementation for Sonoma Resource Land management 8 Sonoma Enhanced Water Quality and Quantity Conservation District alteration Petaluma River Watershed Multi-Benefit Flood Sonoma Resource Landscape 9 Petaluma Alleviation, Groundwater Recharge, and Habitat Conservation District alteration Restoration Project Sonoma Resource Conservation District 10 Sonoma Circle Bar Groundwater Recharge Basin and ESA with Sue Smith

Southern Sonoma County 5-8 ESA / D170210 01 Stormwater Resources Plan October 2018 Draft Final Attachment: Stormwater Presentation Meeting Date: February 13, 2019

5. Quantitative Methodologies And Identification and Prioritiza ion of Projects

TABLE 22 (CONTINUED) SOUTHERN SONOMA SWRP PROJECTS

Main Project Management ID Watershed Project Name Project Source Action Type

Sonoma Resource 11 Petaluma Increasing Groundwater Recharge on Rangelands Programmatic Conservation District Installing Vegetative Filter Strips to Clean and Sonoma Resource 12 Petaluma Programmatic Infiltrate Water on Ranchlands Conservation District Keyline Ploughing to Increase Groundwater Sonoma Resource 13 Petaluma Programmatic Infiltration on Conservation District Channel Sonoma County 14 Sonoma Tolay Restoration modification or Regional Parks creation Lower Petaluma River Valley Conservation 15 Petaluma Sonoma Land Trust Study Strategy Erosion Control, Habitat Restoration, and Sonoma Ecology 16 Both/Either Stormwater / Trash Capture along Roads in Programmatic Center Sonoma County Stormwater Capture & Groundwater Recharge in Sonoma Ecology 17 Sonoma Study Upper Nathanson Creek Center Stormwater Improvements to Roads and Trails in Sonoma Ecology 18 Sonoma Programmatic Sonoma Valley State Parks Center Middle & Lower Nathanson Creek Flood Sonoma Ecology 19 Sonoma Programmatic Management and Habitat Restoration Center Sonoma-Marin 20 Both/Either QWEL Rainwater Harvesting Training Module Saving Water Programmatic Partnership Sugarloaf State Park Erosion Reduction, Habitat Sonoma Ecology 21 Sonoma Infrastructure Restoration, and Bridge Repair Center Stormwater Management & Habitat Enhancement Sonoma Ecology 22 Sonoma Programmatic at Maxwell Park Center Creek Restoration and Spillway Replacement or Sonoma Ecology 23 Sonoma Study Modification at Larson Park Center Restoration of Natural Hydrology and Salmonid Sonoma Ecology 24 Sonoma Revegetation Habitat at Alder Park Center Stormwater Management at Sonoma Valley Sonoma Ecology 25 Sonoma Swales/Filter strips Regional Park Center Channel Erosion Control and Riparian Restoration at Van Sonoma Ecology 26 Sonoma modification or Hoosear Wildflower Preserve Center creation Stormwater Management and Water Conservation Sonoma Ecology Land management 27 Sonoma along Rodgers Creek Center alteration Carriger Creek Stormwater Capture and Sonoma Ecology 28 Sonoma Basin Groundwater Recharge Center Stormwater Management at Sonoma Valley School Sonoma Ecology 29 Sonoma Programmatic Campuses Center Sonoma Creek Watershed Stream Restoration: Sonoma Ecology 30 Sonoma Revegetation Sonoma Developmental Center Reach Center Channel Sonoma Resource 31 Petaluma Willow Brook Creek Groundwater Recharge modification or Conservation District creation Sonoma Mountain Rainwater Storage and Sonoma Resource 32 Petaluma Capture for use Forbearance of Groundwater Extraction Conservation District Sonoma Ecology 33 Sonoma Kenwood Marsh Restoration Basin Center Upper Petaluma River Watershed Multi-Benefit Sonoma Resource Landscape 34 Petaluma Flood Alleviation, Groundwater Recharge, and Conservation District alteration Habitat Restoration Project Lower Watershed Flood Plain Restoration in Sonoma Ecology 35 Sonoma Programmatic Freshwater Streams Center

Southern Sonoma County 5-9 ESA / D170210 01 Stormwater Resources Plan October 2018 Draft Final Attachment: Stormwater Presentation Meeting Date: February 13, 2019

5. Quantitative Methodologies And Identification and Prioritization of Projects

TABLE 22 (CONTINUED)

SOUTHERN SONOMA SWRP PROJECTS

Main Project Management ID Watershed Project Name Project Source Action Type

Upper Sonoma Creek Flood Management and Sonoma Ecology 36 Sonoma Programmatic Habitat Restoration Center Lower Sonoma Creek Rainwater Catchment and Sonoma Resource 37 Sonoma Capture for use Stormwater Infiltration Project Conservation District Sonoma Mountain Institute Rainwater Catchment Sonoma Resource 38 Petaluma Capture for use Project Conservation District 39 Sonoma Olsen Park Detention and Trash Capture City of Sonoma Basin First Street West Green Street and Flood 40 Sonoma City of Sonoma Infrastructure Reduction Project Broadway and Leveroni Road Flood Reduction and 41 Sonoma City of Sonoma Infrastructure Trash Capture Project 42 Petaluma Lichau Creek Flood Mitigation and Detention Basin City of Petaluma Programmatic 43 Petaluma City of Petaluma trash capture device pilot project City of Petaluma Infrastructure Channel 44 Petaluma Cougar Mountain Creek Riparian Restoration Sonoma Land Trust modification or creation Channel 45 Petaluma Lakeville Creek Riparian Restoration Sonoma Land Trust modification or creation Channel 46 Petaluma Frog Creek Riparian Restoration Sonoma Land Trust modification or creation Land Acquisition from willing seller in Lower 47 Sonoma Sonoma Land Trust Programmatic Sonoma Creek Stormwater-Friendly Landscape Transformations City of Petaluma & 48 Petaluma at Petaluma Schools, Churches, Community Programmatic Daily Acts Centers and other Public Sites 49 Petaluma Santa Rosa Junior College Rain Gardens SRJC & Daily Acts Capture for use Sonoma County 50 Sonoma Rodgers Creeks Stormwater Detention Basin Water Agency Stormwater Detention on Multiuse Areas in Sonoma County 52 Sonoma Programmatic Nathanson Creek Water Agency Sonoma County 53 Sonoma El Verano Area Stormwater Detention Basin Water Agency Equine 55 Petaluma Equine Water Stewardship Environmental Programmatic Management Sonoma County 56 Petaluma Upper Lichau Creek Stormwater Detention Basin Water Agency Watershed Classroom - Pollution Monitoring & Friends of the 57 Petaluma Education Education in the Petaluma Watershed Petaluma River Sonoma County 58 Sonoma Carriger Creek Stormwater Detention Basin Water Agency Storm Water Capture & Re-Use at Steamer Friends of the 59 Petaluma Capture for use Landing Park Petaluma River North Bay 60 Sonoma Sonoma Creek Stormwater Capture Project Basin Alliance Friends of the 61 Petaluma Adopt A Creek Project Study Petaluma River Channel Petaluma River Dredging and Beneficial Re-use of 62 Petaluma City of Petaluma modification or dredge material creation

Southern Sonoma County 5-10 ESA / D170210 01 Stormwater Resources Plan October 2018 Draft Final Agenda Item: 6A Attachment Meeting Date: January 28, 2019

Watersheds 21 Petaluma River Sonoma Creek 36 24 Projects by 33 Management Action Type Basin

25 Swales/Filter strips 18 30 Capture for use 56 Channel modification 38 or creation 23 6 Land management 53 22 17 alteration 26 39 40 32 Landscape alteration 28 52 31 51 34 4 58 41 Revegetation 42 49 19 50 Infrastructure 1 27 2 5 35 Programmatic 8 54 Study 4359 48 62 1113 3 7 Locations for Projects 16, 14 37 47 12 10 20, 29, 55, 57, and 61 to be determined 9 60

4546 44

15

0 20,000 N Feet Path: \\esa\esa\GIS\GIS\Projects\17xxxx\D170210.01_SoSonomaSWRP\03_MXDs_Projects\Figures\PotentialProjects_SWRP_draftfinal.mxd, mmc11/5/2018

SOURCE: Projects (ESA/SCWA 2017), Watersheds (SCWA 2017) Southern Sonoma SWRP Figure 16 Southern Sonoma SWRP Project Locations