• Applications for City of Flagstaff of the integrated hydrologic and hydraulic MIKE SHE / HYDRO numerical model for the 130-sq-mi main stem Rio de Flag watershed, which encompasses all of Flagstaff.  This included: flood study of major drainage infrastructure for Rio De Flag in the Continental Area and downstream, and, simulation of Low Impact Development (LID) and detention practices in future development areas, and future downtown development (impervious area increases) on downtown flooding.
  • Service on the Technical Review Committee (TRC), in support of Colorado River area Tribes (Fort Mojave Indian, Quechan, Colorado River Indian, Cocopah, Chemehuevi, and Hualapai Tribes), for hexavalent-chromium groundwater contamination remediation at the Pacific Gas & Electric (PG&E) Topock Gas Compressor Station, south of Needles, California (2011-2019).
  • Expert consultant services, water settlement-related, for the Yavapai-Apache Nation.
  • GIS support for water resources forecasting in the Upper Gila – Mangas (NM) watersheds for the Iron Knot Ranch (NM).
  • National Tribal Water Council (NTWC) Technical Advisory Council (TAC) – through Northern Arizona University’s Institute for Tribal Environmental Professionals (ITEP).
  • Support for water-related litigation and negotiation.Second Mesa Day School
  • City of Flagstaff Water and Sewer Impact Analyses (WSIA) for proposed private development using Bentley Watergems and Sewercad software, along with Civil 3D and ArcGIS Software.
  • Rio de Flag Integrated GIS-based hydrologic and hydraulic distributed DHI MIKE SHE / MIKE 11 model and flood studies, with consideration for post-fire flooding for the City of Flagstaff (City- and FEMA-funded).
  • Water System Model for Sipaulovi Village using Bentley Watergems software (standalone, Civil 3D- and ArcGIS-integrated models, and an EPANET model), inclusive of field system performance testing (pro-bono)
  • Regulatory and requirements review for APS dams and impoundments at Cholla and Four Corners power plants.
  • Water supply and infrastructure evaluation, including well-field and pipeline evaluation for Moenkopi Developers Corporation.
  • Engineering design support for Ak-Chin Indian Community production wells.
  • Childs-Irving power plant decommissioning support for APS.
  • Water Infrastructure Master Plan for Sipaulovi Village, Hopi Reservation.
  • Flood studies for Schoolhouse Draw (Flagstaff, AZ) and Honey Draw (Page, AZ)
  • Water supply and water systems evaluations and full design of new water systems (Navajo-aquifer well, 200,000-gallon storage, disinfection, pH control & arsenic treatment, service and fire-flow pumping, transmission); 500-yr flood studies and SWPPP for the new Second Mesa Day School (commissioned 4/2007).
  • Review of drainage and flood studies for Coconino County.
  • Design period-services for a 1,500 gpm production well and related infrastructure for the Ak-Chin Indian Community’s Industrial Park.
  • Groundwater Assessment and Evaluation for the Yavapai Apache Nation (with Clear Creek Associates).
  • A Comprehensive Monitoring Plan for Fossil Creek Restoration: A Model for Decommissioning Hydropower Facilities in the 21st century. 3-yr project for Nina Mason Pulliam Trust.
  • Evaluation of post-Rodeo-Chediski-fire Black Canyon Lake (Arizona Game and Fish Department) watershed hydrology, Probable Maximum Precipitation and Flood (PMP/PMF) estimation; evaluation of existing spillway and improvements.
  • Evaluation of water rights history and hydrology, completion of topographic surveys and soil testing, and, preparation of a plan for County in-house repair of two small dams on a tributary of Pumphouse Wash.
  • Hydrologic, Hydraulic and Sediment transport evaluation in support of FERC-approved Decommissioning by APS of the Childs-Irving Hydroelectric Facilities (included topographic survey)
  • Show Low Creek ReservoirShow Low Creek Reservoir System Evaluation and Recommendations. Alternatives evaluation completed in order to reduce the severity of dam safety hazard classification and identify improvements that would meet Navajo County needs; also assessed the ground water recharge benefit provided by Lone Pine Dam.
  • Fate of Big Park Wastewater District Effluent Discharges into Jacks Canyon, Village of Oak Creek. Completed for the Big Park Wastewater District. Assessed the fate of wastewater treatment plant discharges into Jacks Canyon.
  • Water supply and water systems evaluation and recommendations, water quality testing, and well/aquifer evaluation for Kayenta Community School.
  • Water system master planning (pumping, storage, treatment and distribution) for Page, Arizona (with CDM).
  • Dredging evaluation and design for Hopi Reservation reservoirs in Keams Canyon.
  • Water distribution system model, model calibration and related work for Page, AZ.
  • Engineering for pump and geochemical testing of deep aquifers at Yucca Mountain, Nevada.

Certain projects listed were completed by EN3 Principals while employed by other firms or organizations and are provided to fully document interests, experience and capabilities.