Jehn Water Consultants,Inc.

Jehn Water Consultants staff have made appearances as expert witnesses in Water Courts located throughout Colorado. We can provide expert testimony in ground water, surface water, surface and ground water rights, geophysical logging and ground water modeling. Expert witness services have also been provided for hearings at City and Town Board meetings, County Commissioners, and State agencies. We have staff members who are qualified as expert witnesses in the fields of ground water hydrogeology, ground water rights, surface water rights, water well design, geophysical logging, and ground water modeling.

Rules in The Republican, Arkansas, Rio Grande, and South Platte River Basins require certain wells to have an installed measurement device verified by a certified well tester. Jehn Water Consultants staff have completed the Division of Water Resources training and certification process to verify well measurement devices.  As Qualified Well Testers, our staff members will coordinate with the DWR Division Liaison to design an acceptable meter test on the well user's system. Following the meter test, we will submit all prescribed forms to document the results, and apply for variances as circumstances warrant.

Jehn Water Consultants staff began designing and implementing dewatering systems in 1985. We have completed or reviewed multiple dewatering projects located throughout Colorado including Denver, Vail, Telluride and Snowmass. Our philosophy is to design cost effective, efficient development removal systems that are site specific. Depending on local hydrological conditions, the design might be a passive, gravity dependent technique or an active pumping system where water is diverted away from the structure into a storm sewer, channel, or stream. For an active design, Jehn Water Consultants recommends dual pumps with a back up generator, to ensure that dewatering will continue even with pump failures or power outages.

When we begin assessing a site, we use ground water modeling programs to optimize the dewatering system that will be implemented. Computer simulations save money in several ways: it reduces the number of data points (monitor wells) required to determine local aquifer parameters, it allows testing options to maximize efficiency of the design, and it eliminates potential problems in the dewatering system. Of particular interest, is the transmissivity of the aquifer or water-bearing material. The amount of flow from the aquifer must be determined so that we can strategically remove water from affected areas.

Our services include any or all of the following:

• Assistance in acquiring appropriate State permits. These include a dewatering permit for the temporary and the permanent system and a discharge permit if the water is diverted to a stream or other conveyance which will lead to a stream. 

• Testing and modeling the site specific details of the aquifer, which could include hiring a drilling company to drill appropriate holes for active testing of the water bearing unit. 

• Designing a system detailing the final analysis and design of the dewatering system. If requested, Jehn Water Consultants can assist in the management of the construction of the dewatering system in order to ensure that specifications are properly followed. 

• Follow-up studies to ensure that the system is operating as designed.

Geographic Information Systems (GIS) are technologies that represent a variety of data types spatially. GIS allows us to take numbers and words from a database and plot them on a map. It allows the user to view, understand, question, interpret, and visualize the data in ways simply not possible in rows and columns of a database.

Jehn Water Consultants has been a leader in using GIS applications in the water resources industry to assess aquifer thickness, boundaries, amount of water and the geologic information from a database to maps. Changing water resources data to a geographic image provides an excellent tool in not only interpreting water resources information, but presenting that information to the public and in Water Court proceedings.