Upcoming Events 


Our normal schedule for presentation/lunch meetings is on the fourth Thursday of the month, at the Nevada County Contractors Association office at 12:00 PM. The address is 149 Crown Point Court, Grass Valley, CA 95945.




EANC Meeting - Thursday February 20- Steve Eubanks, Fire Safe Council of Nevada County (note this is the third Thursday in February)


Steve will be giving a program about the activities and efforts undertaken by the Fire Safe Council in light of the increasing fire danger threatening our community. He will also discuss what we can do as individuals to mitigate the risk of wildfire, and to help increase the survivability of our homes and properties.


Steve Eubanks

Steve Eubanks is a Member of the Board of Directors of the Fire Safe Council of Nevada County. Steve came to Nevada County in 1998 on assignment with the U.S. Forest Service as Forest Supervisor for the Tahoe National Forest. Steve retired in 2008 after a nearly 40 year career with the U.S. Forest Service.


Steve received a B.S. in Forest Engineering from Oregon State University, College of Forestry in 1970. He later completed a graduate studies program in Public Administration at Lewis and Clark College in 1982.


Steve began his career in 1970 as an engineer, and then worked as a forester for the U.S. Forest Service. He has worked in Oregon, Washington, Washington D.C., Minnesota, and California.


In his time with the U.S. Forest Service, he gained broad experience in national forest management including forestry/silviculture, wildlife and fisheries management, fire management, hydrology/watershed management, cultural/historical resource management, wilderness management, forest planning, mining/geology, forest policy development, public affairs, and range management.


Steve was involved in extensive work with Ecosystem Researchers and scientists in developing concepts of forest ecosystem management and sustainability that were a catalyst/foundation for the Forest Service’s implementation of their Ecosystem Management Program.


Since 1995, Steve has worked as a Leader of an International Forestry Team working in central Siberia, Russia to develop sustainable forestry concepts and practices. His team has worked with their Russian colleagues on fire management (prescribed burning, suppression), silviculture (reforestation, precommercial thinning), forest policy development, post-fire restoration, forest product marketing, and plans for sustainable forest resource management.


More recently, Steve has been working locally as a Forestry Consultant and has been involved in projects for the Sierra Nevada Conservancy (SNC), Placer County and the Placer County Air Pollution Control District, the Nevada County Biomass Task Force, and the Sacramento Area Council of Governments (SACOG).


The EANC is looking for programs!  If you are interested in presenting your engineering, ppanning, development or any other landuse project, please let us know!


Nevada County STEAM Event - March 18


The 2020 Nevada County Steam Event will be held on Saturday, March 18, at the Nevada County Fairgrounds.  The EANC will be involved in judging on Friday, March 17, and the Association will award cash prizes of $100, $75, $50, and $25 for First, Second, Third, and Honorbale mention, respectively.  The Association will be judging the entries based on scientific principals, originality, thoroughness, and creativity.  Come join the fun on Saturday!




Programs for 2020 were:


EANC Meeting - Thursday, January 23- Dr. Gus Tolley, "Methods of Numerical Modeling in the Field of Hydrology"


Numerical models are often used in hydrology to represent the complex, interconnected physical flow processes that occur across natural systems. Although simplified representations of reality, numerical models can be quite complex. This is especially true for integrated hydrologic models, which represent not only groundwater, but also vadose zone, surface water, landscape, and climate processes. They are useful for evaluating interactions between various resources and management activities, e.g., crop-water demand and groundwater pumping, groundwater-surface-water interactions, climate change and ET. The complexity of (integrated) models requires careful assessment of the model to ensure a scientifically well-based understanding of the model’s capacity as a decision-making tool in water resources management. Modelers use tools such as “sensitivity analysis”, “calibration”, and “uncertainty analysis” to assess a model’s competence, and also to develop model-based decision support. We illustrate the development of such a decision-support system, from conceptual model, to integrated model, to model assessment, and adaptive management using the Scott Valley Integrated Hydrologic Model (SVIHM) as an example. We demonstrate how the conceptual and numerical models of the system are refined as a result of model assessment, decision-support for further monitoring, and the resulting data obtained. We show that the fine-tuning (“calibration”) of integrated models requires adjusting important non-groundwater parameters, but also adjusting model structure, and model assessment structure. In the case of SVIHM, the process has led to a computationally efficient integrated model that properly reproduces observed groundwater-surface-water interactions, and a tool to assess uncertainty about the outcome of alternative future projects as part of the decision-making process in the GSP development.


Dr. Gus Tolley


Gus Tolley received a B.S. in geology from UC Santa Barbara, a M.S. in hydrology from New Mexico Institute of Mining and Technology, and a Ph.D. in hydrology from UC Davis. His doctoral research focused on groundwater-surface-water interactions in agricultural groundwater basins with groundwater dependent ecosystems. He has experience with development, sensitivity analysis, calibration, and uncertainty analysis of integrated hydrologic models. He was one of the lead developers of the Scott Valley Integrated Hydrologic Model (SVIHM), which is currently being used to formulate the groundwater sustainability plan for the basin. He recently returned to Daniel B. Stephens & Associates (Geo-Logic Associates affiliate) where he is working out of the Grass Valley, CA office.