Water Resources

R&M’s water resources team offers a full spectrum of hydrology and hydraulics services in support of civil infrastructure projects. We provide expertise across all stages of project development – from pre-project planning and concept development, through design, construction and post-construction monitoring. R&M provides the following hydrologic and hydraulic expertise: data collection (stream gaging, flow measurements, geomorphology assessments), hydrologic analyses (flood studies, low flow and duration flow analyses, stream basin studies, spring breakup studies, storm water runoff computations), erosion analyses (bank migration studies, erosion assessments, sediment transport computations), hydraulic analyses (bridge, culvert, storm drain system, open-channel hydraulics), hydraulic design (stream crossing structures, fish passage culverts, erosion control, storm drain systems), and stream restoration, relocation and reclamation (stream bank restoration, stream realignment and relocation, placer-mined valley reclamation).

Group Manager - Water Resources

Hans Arnett


read Hans's bio

Hans joined the R&M team in February 2012. He has more than 24 years of hydrologic experience in Alaska. His work has included hydrologic data collection; hydrologic and hydraulic modeling and analyses; stream relocation projects; hydropower studies; feasibility studies; placer-mined land reclamation; scour and bank migration analyses; stream crossing structure and erosion control design and basin analyses. Hans holds a M.S. in Geology from the University of Alaska Fairbanks and a B.S. in Geology from Montana State University.

The Big Delta State Historical Park Boat Launch Hydrology Study was conducted as part of a study to examine the feasibility of relocating existing boat launching activities along the Tanana River in Big Delta. The boat ramps at the existing launching facility are badly deteriorated and present a security concern for the Alyeska Pipeline Service Company. At the request of the Alaska Department of Natural Resources, R&M performed analyses of site hydrology and long term erosion trends, and conducted topographic, bathymetric, and water velocity surveys.
The Alaska Energy Authority intends to construct improvements to the Bradley Lake Hydroelectric project that will divert flows from the upper portion of the glaciated Battle Creek watershed into Bradley Lake, resulting in increased annual energy output. R&M has been tasked with the performance of hydrologic and hydraulic analyses to assist with the design of the diversion project. R&M’s efforts have included office and field studies of basin hydrology and sediment; flood frequency and duration flow analyses; and hydraulic analyses of the proposed diversion and canal system.
The community of Hughes lies along the Koyukuk River in Interior Alaska, and has a long history of flooding caused by ice jams, spring snowmelt, and heavy rains. The Alaska Department of Transportation and Public Facilities intends to construct the Hughes Airport Improvements project to address flooding at the airport by raising the runway above the level of flooding. DOT&PF tasked R&M with defining the flood hazard in Hughes, providing three alternatives for mitigating the flood hazard at the airport, and investigating local material sources and developing draft mining plans.