Laserfiche WebLink
Albert Frei and Sons, Inc. Page 2 <br /> Hatchery Pit - M-2014-043 <br /> January 7, 2019 <br /> Patrick Broda identified in the original permit application. This appears to be a fairly <br /> shallow well at 34 feet deep. This well was not identified in the original permitting <br /> process. How will this well be protected from impact? <br /> This was a mistake on my part when I transferred the coordinates from the SEO <br /> records to my well map, I mixed them up with another well. Mr. Broda does not <br /> own the property where this well and the 2 monitoring wells are located any longer <br /> and the well can not be physically located. It appears from the SEO records that <br /> well permit # 252799 was located approximately 25 feet south of this older well. <br /> When I went out there to look for it, it appears from the location provided by the <br /> State Engineers records it is located in the middle of the access road for that <br /> parcel. We suspect it was removed when the area was mined. <br /> 2.) Page 2 of the technical revision indicates in August of 2018, the groundwater elevation in <br /> the three monitoring wells along the east and south side averaged 5,078.5 feet. This does <br /> not appear to be correct(See discussion above). Please provide the Division a date when <br /> dewatering began. <br /> This is my mistake I used the averages for June 2016 not for August 2018 which should <br /> have been an average of 5074.21. Frei's records indicate that dewatering in Stage 2 <br /> started in mid March 2018. <br /> 3.) As the water levels of the area have now been altered due to dewatering,there now is <br /> only limited pre-mine water level data that can be used to evaluate off-site impacts. Given <br /> this, please update the groundwater monitoring and mitigation plan with the following: <br /> a. Establish baseline high and low water levels for each of the monitoring wells. This <br /> can be done using the pre-dewatering water levels and the information provided in <br /> the CTL and Deere and Ault studies included in the original application. For each <br /> well please provide a justification for each high and low elevation. <br /> The table in the revised Ground Water Monitoring.and Mitigation Plan show the baseline <br /> elevations we propose using from this time forward. <br /> b. Please re-evaluate the during mining and post mining water level impacts and <br /> provide a mitigation plan to address these impacts. The installation of a perimeter <br /> drain should address groundwater mounding and shadowing issues associated with <br /> the installation of the clay liner and the monitoring plan should help evaluate the <br /> effectiveness of the drain. However, adequacy issues regarding the clay liner and <br /> French drain will need to be addressed (see below). <br />