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June 12, 2019 C-1981-041/Roadside Portals CCW <br /> <br /> <br />Number of Partial Inspection this Fiscal Year: 9 <br />Number of Complete Inspections this Fiscal Year: 4 <br /> <br /> Page 3 of 7 <br /> <br /> <br />Photo 1: New area disturbed by the landowner. Photo taken looking south. <br /> <br />FISH and WILDLIFE – Rule 4.18: <br /> During the inspection of the site, several droppings (mostly from deer) were observed. The post-mining <br />land use for the mine is rangeland and wildlife habitat. <br /> <br />HYDROLOGIC BALANCE - Rule 4.05 <br />Drainage Control 4.05.1, 4.05.2, 4.05.3; Siltation Structures 4.05.5, 4.05.6; Discharge Structures 4.05.7, 4.05.10; <br />Diversions 4.05.4; Effluent Limits 4.05.2; Ground Water Monitoring 4.05.13; Surface Water Monitoring 4.05.13; <br />Drainage – Acid and Toxic Materials 4.05.8; Impoundments 4.05.6, 4.05.9; Stream Buffer Zones 4.05.18: <br /> During the inspection of the site, new facilities built by the land owner were observed within the permit <br />boundary. A previously observed buried pipeline on tract 70 was connected to a series of new trenches (Photo 2). <br />Evidence of recent flow was observed in the majority of the trenches. About 5 trenches were observed in total. <br />The trenches were approximately 6 to 8 inches deep and approximately 18 inches wide. At the time of the <br />inspection, only one trench was flowing (Photo 3). There were cuts in the trench every so often on the down-slope <br />side of the trench allowing water to flow out of the trench. (Photo 4). This trench was adjacent to Object IDs 54, <br />55 and 56 identified by the Division. These object IDs were included in the maintenance repairs on March 27, <br />2019. Ben Krause of DWR observed the facilities with the Division and concluded in his opinion that the facilities <br />were an irrigation system. Water was flowing out of the west-east trench onto the down slope land to the north. <br />This included the above mentioned repair areas (Photo 5). There were no indications of instability or erosion at <br />any of the repair sites. There were also no indications of water loss into the repair areas. The repair markers <br />remained on site and clearly identified the objects. Ben Krause conducted a bucket and stopwatch test to give an <br />estimate of the amount of water flowing into the trench. He took measurements and averaged the time to 2.4 <br />seconds to fill a 5 gallon bucket. The value was then used to calculate a flow rate of 125 gallons per minute or <br />0.28 cubic feet per second.