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PERMIT #: M-1999-058 <br />INSPECTOR'S INITIALS: GRM <br />INSPECTION DATE: September 16, 2010 <br />OBSERVATIONS <br />This inspection was conducted for final compliance of the Mined Land Reclamation Board's Order MV-2009-023 for <br />stormwater controls . The Colorado Division of Reclamation, Mining, and Safety has monitored progress of the plan and <br />implemention of stormwater controls at the Yule Quarry as approved under amendment AM-01. The Yule Quarry is a <br />110c permitted marble quarry located southeast of Marble, Colorado. Cedric Beggar, representative for Colorado Stone <br />and Greg Lewicki the operator's consultant accompanied the inspector on site. <br />To best address the inspection, the inspector notes that 5 areas are identified for stormwater drainage control and <br />sedimentation retention. <br />Area 1 and Sump 1 are located at the highest point of the current permit area. This area is utilized as a dump for waste <br />rock and previously for fines placement. The approved stormwater control plan includes grading of the haul road to the <br />highwall side to a collector ditch. The collector ditch then directs water to Sump 1. The DRMs inspector and operator's <br />consultant noted the general construction of the sump is good. Loose materials, bentonite and large waste marble blocks <br />are the construction materials. A 2 inch, high water stand pipe is installed with a screen. The stand pipe has a valve at <br />the outlet for control. This construction is typical of all the sumps. Two minor isues were noted for correction. 1) the <br />emergency spill away needs to be relocated. In it's current location it would dump into Area 5 and the system was <br />designed to kick it out to the creek drainage in a historic event. This is easily fixed by building up the current spill away <br />elevation, opening up the inflow side, and clearing out some material on the east side. A natural path was identified that if <br />the sump filled with water would back out of the structure and be directed to the natural drainage. The second issue is the <br />stand pipe is also positioned similarly. The consultant and inspector agreed the stand pipe did not need to be relocated as <br />an easy remedy is to construct a bar ditch below the outlet just above the generator trailer that directs flows to Sump #2 <br />which is the intended target anyway. <br />Sump 2 and Area 2 are located down gradient and to the north of #1. This area collects water from dumps, the middle <br />portal, and parking pad. General construction of Sump #2 is typical of all. A minor adjustment of a bar ditch that kicks <br />the collector ditch over to the sump in the bend of the road is needed. This will require a small breach in the sump berm <br />to allow inflow but will not affect the sump integrity. Part of the stromwater plan reuired the extension of an access road <br />from the generator trailer down and around to sumps 2, 3 and 4. The upper section of th eroad is pulverized marble. The <br />middle and lower sections are earthen. DRMS and the consultant recommeded to the operator that these areas be seeded <br />to help prevent erosion, sedimentation and facilitate reclamation. <br />Sump 3 and Area 3 cover much of the historic marble dump. The dump consists of large marble blocks that have been <br />there in many cases for over 100 years. Sump 3 is typical in construction. The inspector and consultant did not note any <br />issues with the sump or area. <br />Sump 4 and Area 4 cover one of the most difficult areas. This area is just below the main portal. There are large waste <br />blocks but the far north slope is very steep loose material. The material was dumped there by the current operator and the <br />cause of off-site damage and most of the sedimentation issues. The original plan called for Sump 4 to be very close to the <br />permit boundary. The location was not ideal for several reasons including the possibility of off site disturbances occuring. <br />The consultant and operator developed a plan to build a concrete collector ditch across the toe of the slope which allowed <br />the location of Sump #4 to be pushed farther into the permit area. The ditch construction used over 90 yards of <br />strengthened concrete. Hay bales, rebar and timber were used as well as free forming around marble blocks to create <br />the ditch. This alliviated to the greatest extent possible off site disturbance from this structure or its maintenance. Along <br />with the concrete ditch the operator put down seed matting and hydro seed on the loose material slope. The operator <br />offered to do this to the entire slope but the adjacent landowner declined. It is very possible that over spray of seed and <br />migration will help protect the entire slope eventually anyway. As noted above, the inspector and consultant <br />recommended seeding of the new access road and sump dumps in all areas. <br />Sump 5 and Area 5 cover the main portal and access road. Along with Sump # 5, there is an ancillary sump at the <br />entrance to the main portal. This is a pre-existing sump that was the only working one when enforcement action was <br />undertaken. Now it is a facilities sedimentation pond that empties into the collector ditch that goes to Sump #5. The <br />Page 2 of 20