STUDY NUMBER ; 9.2 



ORGANIZATION ; U.S. Geological Survey (USGS), Montana Office 



TITLE OF STUDY ; Ground Water in Shallow Aquifers along the 

 Upper Clark Fork, Southwestern Montana 



CONTACTS ; Tom Brooks - USGS, Helena Office - 449-5263 



Joe Moreland - USGS, Helena Office - 449-5263 



OBJECTIVE ; Assess the quality and quantity of shallow ground 

 water and its relationship to surface water at selected sites 

 within the Clark Fork Basin from Warm Springs to Milltown. 



CURRENT STATUS ; The Helena Office of the USGS has recently 

 received funding to initiate this study. A work plan is 

 being developed according to the following general proce- 

 dures : 



Up to thirty wells will be established at varying depths 

 to establish characteristics and seasonal changes of ground 

 water flow systems within the shallow aquifers. Water 

 quality samples will be collected at least annually for 

 analysis of common constituents, dissolved metals and several 

 field parameters. Static water levels will also be collected 

 periodically from the wells. Seepage runs will be conducted 

 to determine relationships between ground water and surface 

 water . 



Using data collected during this study and other 

 existing data from state and federal agencies, geochemical 

 models, such as WATEQF and WATE02 will be used to determine 

 equilibrium relationships in water. Potentiometric-surface 



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