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Cojo-Jalama Ranch Groundwater Sustainability, Bixby Management Inc., Santa Barbara,
California. Mr. Duvergé completed a Safe Yield Report on a 25,000-acre ranch in Santa Barbara
County using County approved soil moisture balance method to quantify recharge and
sustainable groundwater production, and evaluate potential impacts on groundwater-dependent
ecosystems. The study was completed to document that the water demand of the ranch’s existing
and future cattle operation would fall within the consolidated rock aquifer’s sustainable yield, and
to comply with County thresholds for determining impact significance under the California
Environmental Quality Act. The evaluation summarized the hydrogeologic setting, groundwater
well distribution and depths, and the results of water level monitoring on the ranch. Prior to the
acquisition of the property by the California Nature Conservancy, Dudek had been assisting the
client resource evaluation work on the ranch by installing and monitoring gauges to measure
rainfall, soil moisture content, and transpiration.
Kunzler Terrace Mine Use Permit and Reclamation Plan EIR, Mendocino County, Ukiah, California.
Conducted a subsurface investigation and prepared a technical memorandum addressing the
potential presence of subsurface archeological resources based on soil age. Logged a series of on-
site test pits for soil type and evidence of paleosols, drafted a memorandum based on the results
that described the soil stratigraphy and the potential for buried archeological artifacts, and assisted
in the preparation of the hydrology and water quality section for the EIR. The Kunzler Terrace Mine
is an aggregate mining operation at the confluence of the Russian River and Ackerman Creek. The
EIR analyzed the potential impacts of a quarry pit to be developed through three phases totaling
approximately 30 acres with a maximum depth of 66 feet.

Belden Barns Winery Focused EIR, County of Sonoma, California. Dudek is preparing an EIR for the
County of Sonoma for a proposed farmstead and winery project that involves winemaking,
hospitality, and farmstead food production on a 55-acre parcel in unincorporated Sonoma County.
Groundwater and geologic hazards were major issues for the project, as it is located on an old
landslide and in an area where groundwater is the sole source of water for rural residences. Mr.
Duvergé established a well monitoring network, conducted a well pump test to determine aquifer
properties, and modeled the long-term cumulative effects on groundwater resources. In addition to
authoring the groundwater resources technical report, Mr. Duvergé also authored the hydrology and
water quality chapters and geology and soils of the EIR.

San Francisco Groundwater Supply Project EIR, San Francisco, California. The San Francisco
Groundwater Supply Project is a project under the City’s Water System Improvement Program, and
will provide the city up to 4 million gallons of local, sustainable groundwater every day. The project
proposes to utilize up to six deep water wells and associated treatment facilities in the city. Dylan
prepared the analysis of aesthetics in the EIR and supported the groundwater analyses and
investigations of the Westside Basin with maps, figures, and GIS data.

Steephollow Creek and Bear River EIR, Nevada Irrigation District, Grass Valley, California. Dudek
prepared the EIR for the Bear River Sediment Removal at Rollins Reservoir Project for the Nevada
Irrigation District. The project would restore and maintain reservoir capacity in Rollins Reservoir on
an ongoing basis through re-establishment of gravel skimming operations on the Bear River below
the confluence with Steephollow Creek. Mr. Duvergé completed a technical review of the
hydrological and geomorphology studies completed for the project, and authored the geology and
soils and the hydrology and water quality chapter of the EIR.

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