Consulting Hydrogeologists Since 1989
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About EGGI

Meet the Senior Team

Daniel Tinkham, M.S., P.G. -- Project Manager

Dan Tinkham DJTinkham@eggi.com has been employed at EGGI since 1989 and has participated in or managed over 750 water supply projects.  Dan Tinkham is an experienced hydrogeologist and project manager of groundwater resource projects who has an advanced understanding of:

· Senior Project Management

· Organization, design, and management of aquifer testing and groundwater monitoring programs

· Aquifer and well field analysis

· Calculation of recharge rates to groundwater systems

· Application of analytical and numerical groundwater models, including USGS-3D (MODFLOW)

· Volumetric water budgets for watersheds

· Base flow analysis of streams

· Mapping and interpretation of glacial geomorphology

· Implementation of groundwater quality monitoring programs

· Design, installation, and development of monitoring and production wells

· Groundwater exploration and development in unconsolidated aquifers

· Groundwater exploration and development in fractured crystalline bedrock

Publications

Tinkham, D.J., 2013, Projection of Glacial Lake Franklin into the Ashland Quadrangle, New Hampshire Geological Survey’s Annual Geologic Mapping Workshop 2013, April 16, 2013, NHDES, Concord, New Hampshire.
 
Tinkham, D.J., and Brooks, J.A. 2010, Surficial Geology of the Holderness, 7.5 minute Quadrangle, Belknap, Grafton, and Carroll Counties, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Brooks, J.A. and Tinkham, D.J., 2009, Surficial Geology of the Bristol, 7.5 minute Quadrangle, Grafton County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Brooks, J.A. and Tinkham, D.J., 2008, Surficial Geology of the Wolfeboro, 7.5 minute Quadrangle, Carroll County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Marts, Jeffrey M. and Tinkham, D.J., 2007, Mitigating the Effects of Elevated Chloride Concentrations in a Valley-fill Aquifer. Oral presentation given at the Meeting of the New England Water Well Association October 2006.  Published in Journal NEWWA, December 2007, p. 286-294. 

Tinkham, D.J., Foster, P.J., Emery, J.M., and Brooks, J.A., 2007, Implications for Aquifer Analysis from Discrete, Anisotropic Water Level Impacts Observed During Pumping Tests Performed in Fractured-Bedrock Aquifers.  Oral presentation at the 42nd Annual Meeting of the Northeastern Section of the Geological Society of America, University of New Hampshire, Durham, New Hampshire.

Hardcastle, K.C., Brooks, J.A., and Tinkham, D.J., 2007, DEM Analysis for Surficial Mapping in the Lakes Region, New Hampshire.  Poster presentation at the 42nd Annual Meeting of the Northeastern Section of the Geological Society of America, University of New Hampshire, Durham, New Hampshire.

Brooks, J.A. and Tinkham, D.J., 2007, Insights into the Wisconsin Deglaciation of the Lakes Region, New Hampshire.  Poster presentation at the 42nd Annual Meeting of the Northeastern Section of the Geological Society of America, University of New Hampshire, Durham, New Hampshire.

Brooks, J.A. and Tinkham, D.J., 2007, Surficial Geology of the East Great Lake, 7.5 minute Quadrangle, Carroll County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Brooks, J.A. and Tinkham, D.J., 2006, Surficial Geology of the Pittsfield, 7.5 minute Quadrangle, Merrimack County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Tinkham, D.J., 2005, Surficial Geology of the Milton, 7.5 minute Quadrangle, Strafford County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Tinkham, D.J. and Brooks, J.A., 2004, Surficial Geology of the West Alton, 7.5 minute Quadrangle, Belknap County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Brooks, J.A., 2004, Surficial Geology of the Northwood, 7.5 minute Quadrangle, Strafford and Rockingham Counties, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Tinkham, D.J. and Brooks, J.A., 2003, Surficial Geology of the Northfield, 7.5 minute Quadrangle, Merrimack County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Brooks, J.A. and Tinkham, D.J., 2002, Surficial Geology of the Laconia, 7.5 minute Quadrangle, Belknap County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Emery, J.M., and Tinkham, D.J., “Groundwater Exploration and Development in Fractured Bedrock in the Piedmont,” American Water Resources Association -- National Symposium on “Future Availability of Groundwater Resources”, March 1992.

Hardcastle, K.C., Brooks, J.A., Emery, J.M., and Tinkham, D.J., Remote Sensing of Groundwater-Controlling, Bedrock Fracture Systems:  Photolineament and Magnetometer Analyses in the Culpeper Basin, Virginia, Geol. Soc. Am., Abs. and Prog.,v. 23, no. 1, p. 41.

Tinkham, Daniel J., Taylor, Keith R., Olafsen-Lackey, Susan, “Influence of Geomorphic Variables on the Yield of Bedrock Wells in the Northern Virginia Piedmont”, presented at “A Conference on Groundwater in the Piedmont of the Eastern U.S.”, Charlotte, NC (October 1989).

Selected speaker, Short Course on Ground Water Protection, Antioch College, Keene, NH, March, 1992.

Selected guest speaker on river dynamics at a meeting of the Pemigewasset Wild and Scenic River Study Committee, February, 1992.

Daniel Tinkham's photo


Recognized experts in groundwater exploration, development, management, and protection.