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42) CC&V Cabin 1 <br /> This cabin was identified by DRMS as a structure to be evaluated. It is a wood structure that <br /> internal research has shown to be owned by CC&V. It is located approximately 1400 feet east of <br /> the easternmost edge of the Main Cresson Mine excavation. Since it is owned by CC&V, it will <br /> not be evaluated for risk of damage. <br /> 43) Teller County Road 88 near Carlton Tunnel <br /> Teller County Road 88 is also called the Shelf Road and is the same Road that exists east of the <br /> mine permit area. However, this location is so far to the southwest of the main Mine permit area <br /> that it is considered a separate structure. It is a dirt road of approximately 20-22 feet wide and a <br /> dirt driveway is used to access the site. This location is where the Carlton drainage tunnel <br /> daylights on the surface and is a part of the permit area. This tunnel begins in the main Mine <br /> permit area and was installed to drain the old underground mine workings. It was completed in <br /> 1941. The elevation is only 6950 feet at the tunnel exit, which is considerably lower than the <br /> workings in the main permit area. The tunnel has a permanent water discharge which leads to a <br /> series of 6 ponds, after which the water is discharged under a permit with the CDPHE Water <br /> Quality Control Division. The discharge enters a culvert under CR88 and enters Fourmile Creek. <br /> A possible threat to the Road would be if a surge of water came out from the Tunnel and <br /> overflowed the culvert under the Road. This is extremely unlikely since the Carlton Tunnel was <br /> built specifically to maintain long term drainage from the mines and it has been in place for <br /> many decades with no history of any surges. <br /> The series of ponds have also been built to good engineering standards with compacted <br /> embankments, design slopes, and a proper drainage system for discharge. The ponds have never <br /> had a problem with stability, sloughing, water seepage, bulging or any other signs of instability. <br /> The ponds have been in place for over 20 years and they are inspected with good frequency by <br /> the mine personnel and water samples are taken of the discharge. <br /> 44) CR 831 owned by Teller County - Segments 44A & 44B <br /> As shown on Map C-la, Segment A of CR 831 is a County Road that leaves CR81 north of <br /> Victor and runs west to the southern edge of the East Cresson Mine (ECME) and the western <br /> edge of the Main Cresson Mine. Most of the Road is in the permit area except for the eastern <br /> edge where it joins with CR81. The Road does cross the southern portion of the East Cresson <br /> Overburden Storage Area(ECOSA) on a bench. The slope stability of the ECOSA has been <br /> evaluated for Structure 4—CR 81. A berm there stops any vehicles from going closer to the mine <br /> operation. Signs are also posted that the Road is in an active mining operation and crossing over <br /> the berms is not allowed. Also, before any blast in the mines, mine personnel clear the Road of <br /> anyone within an unsafe distance from the blast. The road is a compacted dirt road of <br /> 56 <br />