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PERMIT#: M-1985-112 <br /> INSPECTOR'S INITIALS:PSH <br /> INSPECTION DATE: January 13,2016 <br /> Operator since the April 2015 measurement, so recent groundwater elevations are not available for the well. <br /> The change in water elevation from 5 feet to 20 feet, 9inches below grade is greater than the required 2 feet <br /> elevation change required to implement the approved mitigation plan. <br /> Loloff Mine <br /> The Division met with Mr. Kelly Hodge with Northern Colorado Gravel & Sand, LLC and J.C. York with J&T <br /> Consulting, Inc. to discuss the citizen complaint at the Loloff Mine site. Mr. Hodge had met with Mr. Francis <br /> the day before to discuss his complaints. <br /> The mine site was actively mining and dewatering during the inspection. Dewatering pumps with 8" diameter <br /> discharge pipes were observed in the southwest corner of the mine site. The water was discharged into the <br /> channel which continues through the Francis property. The ditch runs southeast from the site, crosses under <br /> Balsam Ave and East 8th St. and into the Ogilvy Ditch. The discharge activity is permitted under NPDES permit <br /> # COG500375. <br /> Conclusions <br /> Channel and culvert <br /> As cited as a problem requiring corrective action by the Operator on Page 1, the dewatering of the site into <br /> the ditch through Mr. Francis' property has caused the culvert under the land bridge on Mr. Francis' property <br /> to become silted in. The Operator stated they would coordinate with Mr. Francis to clean out the silt in the <br /> channel and replace or repair the culvert pipe as needed. The Operator stated Mr. Francis prefers to have the <br /> work done when the soil is not frozen. The Operator may be required to repair the land bridge as part of the <br /> culvert replacement or repair project. The Operator stated material and equipment were available at the <br /> mine site to complete the work and would coordinate with Mr. Francis to complete the work. The Operator <br /> must update the Division on the status of the repairs within 60 days of the mailing date of this inspection <br /> report. <br /> Wells <br /> The Francis wells are located approximately 400 feet (Wells #3 and #2) and 450 feet (Well #2) from the south <br /> permit boundary. All three wells are located within the estimated cone of depression / radius of influence <br /> calculations, with recharge, of 566 feet. The radius of influence calculation, dated July 3, 2013, was submitted <br /> with TR-01. The Division believes the dewatering of the Loloff Mine has impacted the groundwater wells on <br /> the Francis property based on the radius of influence model, the change in water elevation from the static <br /> levels reported in the DWR well permits compared to the limited groundwater monitoring data collected by <br /> the Operator and the observation for this report. <br /> As cited as a problem requiring corrective action by the Operator on Page 1, Loloff Construction, Inc. must <br /> implement the approved mitigation plan for the site and work with Mr. Francis to investigate and rehabilitate <br /> the well(s) on this property within 60 days of the mailing date of this inspection report. Failure to comply with <br /> the corrective action may result in the problem escalating to possible violation and an enforcement hearing <br /> being scheduled in front of the Mined Land Reclamation Board. <br /> The Operator stated they believe the impacts to the Francis wells are temporary and groundwater elevations <br /> will return to pre-mining levels once the proposed slurry wall at the mine site is installed. The Slurry Wall <br /> Assessment report, dated July 13, 2015, by McGrane Water Engineering, LLC submitted as part of AM-01 <br /> indicates the Francis wells will not be impacted by shadowing or mounding effects from the slurry wall <br /> Page 4 of 10 <br />