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Home My WebLink About20101369.tiff • Lone Tree Pit 112 PERMIT APPLICATION TO THE COLORADO DIVISION OF RECLAMATION, MINING, AND SAFETY Miller Family Investments, LLC • June 2010 PREPARED BY: Greg Lewicki And Associates 11541 Warrington Court Ilion e(303)346-5196 Fax:(303)-346-6934 Parker,CO 1 S 80138 E-Jlail:inforalewicki.biz • C C . Pt , Pk) 2010-1369 h %tip`-44'�� - ay-io v • LONE TREE PIT PERMIT REGULAR 112 OPERATION TABLE OF CONTENTS INTRODUCTION LEGAL DESCRIPTION EXHIBIT A INDEX MAP EXHIBIT B PRE-MINING AND MINING PLAN MAPS OF AFFECTED LANDS EXHIBIT C MINING PLAN EXHIBIT D RECLAMATION PLAN EXHIBIT E RECLAMATION PLAN MAP EXHIBIT F WATER INFORMATION EXHIBIT G WILDLIFE INFORMATION EXHIBIT H SOILS INFORMATION EXHIBIT I VEGETATION INFORMATION EXHIBIT J . CLIMATE INFORMATION EXHIBIT K RECLAMATION COSTS EXHIBIT L OTHER PERMITS AND LICENSES REQUIRED EXHIBIT M SOURCE OF LEGAL RIGHT TO ENTER EXHIBIT N OWNERS OF AFFECTED LAND, OWNERS OF MINED SUBSTANCE EXHIBIT O MUNICIPALITIES WITHIN TWO MILES EXHIBIT P PROOF OF MAILING NOTICES TO COUNTY COMMISSIONERS & SOIL CONSERVATION DISTRICT EXHIBIT Q PROOF OF FILING WITH COUNTY CLERK EXHIBIT R PERMANENT MAN-MADE STRUCTURES EXHIBIT S RULE 1.6.2(1)(b) EXHIBIT T GEOTECHNICAL STABILITY EXHIBIT EXHIBIT U • Lone Tree Pit, June 2009 • INTRODUCTION The proposed Lone Tree Pit is located approximately 3.5 miles northeast of Pierce in Weld County, Colorado. The site is bordered by dry land farming on the east south and west. To the north is a gravel pit operated by Weld County Public Works and to the southeast is an exhausted gravel pit in the reclamation stage which is also operated by Weld County, The topography for the site slopes to the Lone Tree Creek which runs from north to south through the site. This creek is dammed in several places upstream and rarely sees any flow. All mining will be conducted above the ground water table. The operation will mine sand, gravel and clay from an alluvial deposit of Lone Tree Creek up to a depth of 20 feet for the production of road base. The estimated production for the site is 150,000 tons per year. Of the total permit area of 40.02 acres, approximately 8.74 acres has historically been mined for road base. The approximate outline of the previous disturbance is shown on Map C-1. The • previously disturbed area will be graded to a maximum slope of 3H:1 V and the pit floor will be graded to match the rest of the mined out pit. There was no topsoil salvaged from the previous operator. All existing trees will remain in place after mining and reclamation. The permittee and landowner for this site is Miller Family Investments. The site will be reclaimed to a land use of rangeland which is the current land use. The topography of the reclaimed land is shown on Map F. • Lone Tree Pit, June 2009 i-1 • LEGAL DESCRIPTION EXHIBIT A The site is approximately 3.5 miles northeast of Pierce. A legal description of the permit boundary is shown on Map C-1 which is included in Appendix B. A general location map is enclosed as Map B-1 in Exhibit B. The total permit area is 40.02 acres. The access point to the Lone Tree Pit is at 40.67979 deg north and 104.71553 deg west. LEGAL DESCRIPTION A tract of land located within the northeast quarter of Section 12, Township 8 North, Range 66 West of the 6`" Principal Meridian, Weld County, State of Colorado and being more particularly described as follows: Commencing at the northeast corner of said Section 12, thence S 45°02'55" W a distance of 42.39'; to the northeast corner of the permit boundary; • thence S 00°02'15" W a distance of 2541.42'; thence N 89°24'04" W a distance of 702.46'; thence N 00°44'23" E a distance of 2533.85'; thence N 89°57'45" E a distance of 671.37'; which is the point of beginning, having an area of 40.02 acres The permit area is owned by Miller Family Investments, LLC. The above described property is to be used for gravel source, roads, stockpiles and sales facilities. i Lone Tree Pit, June 2009 A-1 • INDEX MAP EXHIBIT B Map B-1, shown below, is an index map which shows the general location of the site. . • Lone Tree Pit, June 2009 B-1 • • Lone Tree Pit, June 2009 B-2 • PRE-MINING AND MINING PLAN MAPS OF AFFECTED LANDS EXHIBIT C Map C-I shows the general pre-mine conditions of the site. Map C-2 shows the mining sequence through the end of mine life. • • Lone Tree Pit, June 2009 C-1 FILE CONTAINS OVERSIZED MAP PLEASE SEE ORIGINAL FILE • MINING PLAN EXHIBIT D 1. General Mining Plan Of the 40.02 acres within the permit area, 30.66 acres will be mined. Of the mined area 8.74 acres has historically been partially disturbed. The old disturbance was pre-law and was never permitted. The access to the site will be directly from CR 37. The existing site access will be used to access the site for mining. See Map C-2 for the extents of mining. Table D-1 Mining Area Material Table Mining Area Acreage Topsoil (C.Y.) Overburden (C.Y.) Gravel (tons) Mining Area 1 12.04 5,827 38,849 495,326 Mining Area 2 13.02 6,302 42,011 535,643 Mining Area 3 5.60 903 9,035 108,416 Total 30.66 13,033 89,895 1,139,384 • The material volumes described in Table D-1 are approximate but are based on test pits that were dug on site.Note that the areas above only include mining areas. Additional areas within the pit that are not going to be mined are the stockpile areas, cottonwood gallery and 30' offset from the property line as a buffer. Table D-3 shows the distribution of the 40.02 acres within the permit area. Table D-2 Mining Area Distribution Table Undisturbed Cottonwood Gallary 4.11 Access Road 0.5 30' Buffer 4.75 Mining 30.66 Total 40.02 Topsoil will be stripped prior to mining each year. Overburden will be removed at the same time as the topsoil but will be handled separately. Topsoil will be stockpiled or directly replaced depending on the portion of the mining area being mined. It is likely that some overburden will not be stockpiled since it is used to make road base. Excess overburden will be placed in the • historically mined area of Mining Area 3. Details of the overburden and topsoil handling are Lone Tree Pit, June 2009 D-1 • shown in Table D-3 and also in Exhibit E - Reclamation Plan. Gravel will be directly loaded into the crusher by a loader or will be hauled to the crusher from the mining face in a truck. A dozer may be used at the mining face to loosen the gravel for the loader. Stockpiles of crushed rock will be placed in Mining Area 1 which is also the Processing Area. These crushed product stockpiles will allow mining to cease for portions of the year and allow for sales through out the year. Highway trucks will haul sellable material to market from the processing site. Truck traffic will utilize CR 37 and will then travel various directions depending on the location of demand. The gravel thickness to be mined is approximately 8-20 feet. Below the sand and gravel is shale. This shale is approximately 28 feet below the natural surface and will not be encountered anywhere within the mining area. Mining will stop no less than 2 feet above the static ground water level. The overburden that is encountered will be used to make road base (needs up to 15% minus 200 mesh material) as well as put back before the topsoil as a subsoil for plant growth • and to enhance water availability in the topsoil. 2. Mining Timetable The following table (Table D-3) is a best estimate of the sequence of operations for the life of the mine and is based on producing up to 150,000 tons per year. • Lone Tree Pit, June 2009 D-2 • Table D-3 Lone Tree Pit Mining Sequence Production per Length of time to Year Comments year(tons) complete(months) 2010 - Site Preparation,Topsoil stripping,build stockpiles along the CR 37. 2 2010- Mine in Mining Area I,stockpile topsoil. Seed the stockpiles.Place 2014 150,000 any excess overburden on the areas hisoricaly mined in Mining Area 39.6 3. Mine in Mining Area 2.Directly place overburden and topsoil from 2014- 120,000 Mining Area 2 on the pit for and slopes of Mining Area 1 in areas 42 8 2018 that won't be used for processing and finished product stockpiles. Seed topsoiled areas. 2018- Mine in Mining Area 3,Strip topsoil and place it in Mining area 2, 120,000 place the overburden encountered on the pit floor. Seed topsoiled 10.8 2019 areas. 2019 _ Remove all equipment.Place topsoil from stockpiles on any 2.0 remaining areas. Seed and much. Total 97.2 The mining schedule is planned to minimize disturbance by reclaiming areas as additional mining is undertaken. The table shows that mining and reclamation will occur approximately 8 years and the total gravel mined will be approximately 1,100,000 tons. This table is based on the production limits and may take longer if demand is low. This is based on the topography and the available exploration data. • Lone Tree Pit, June 2009 D-3 • 3. Mine Facilities and Operation The facilities on site will be the crushing/screening plant and a truck scale/office. A double cattle guard will also be installed for to reduce vehicle tracking. The crusher/ screen will be mobile and will be moved to and from this site each year. The equipment will be located in Mining Area 1 (see map C-2). Fuel for the operation will come from either the fuel tank associated with the crusher or a mobile fueling truck. There will be no permanent tanks on site. Maintenance vehicles will visit the site regularly to provide oil, grease, and perform other minor maintenance on vehicles and equipment. Any major repair work required will be performed off site or during normal operating hours. The truck scale of approximately 20' x 70' size is also installed within the permit boundary. See Map C-2 for the location of the truck scales. The following list is the best estimate as to the equipment which will be used onsite throughout the mine life: • - 2 Front End Loaders 980 size or smaller - 0-2 Off Road Dump Trucks - Part Time Water Truck (As needed) - Topsoil Equipment (Scrapers, Graders) Support equipment may need to come on site on an as-needed basis. The operator commits to clearly marking the permit boundary. The existing perimeter fence is the permit boundary and will not be removed as part of mining. There will also be minor roads leading to the stockpiles and the different mining areas but all roads will be retopsoiled after mining except a 200' section of the access road to allow for landowner access after reclamation. • Lone Tree Pit, June 2009 D-4 • 4. Topsoil and Overburden Handling Topsoil will be salvaged from all Mining Areas. The expected topsoil thickness is approximately 0-6 inches. The topsoil is thicker in areas with overburden beneath the topsoil and nearly non existent on the gravel bar areas. Gravel will be mined and taken to the crusher/screener by loader or truck. Mining will be conducted in 3 phases, which minimizes disturbed area. Mining Area 1 will become the processing area for the entire mine life. The crushing/screening, product stockpiles and the scale will be located within Mining Area 1. Mining will progress from Mining Area 1 to 2 and finish in 3. While mining in Mining Areas 1, all topsoil will be stockpiled for use in reclamation. In Mining Area 2 and 3, salvaged topsoil will be directly placed in areas ready for reclamation. In Mining Areas 1, 2 and 3 the overburden will be used in the road base as well as placed on the pit floor to enhance the reclaimed land. The depth of overburden replaced will vary from 4" to 18". The overburden will provide a deeper growth medium than topsoil itself as well as slow the infiltration of precipitation. The stockpile will be located along the CR 37 and the property line to the east. • No backfilling of slopes will be required since the mining slope is 3I-N V. All gravel below the water table will be left unmined. The bedrock below the gravel is the Laramie Formation of the Cretaceous Age. The topsoil stockpiles will be seeded within a month of being placed. The topsoil pile will be irrigated with a water truck to get initial vegetation. The reclamation seed mix will be used on the topsoil stockpile. No waste material from processing will be generated on site. No acid or toxic forming materials will be produced on site. No blasting will be conducted as part of the mining operation. • Lone Tree Pit, June 2009 D-5 • 5. Water Handling Water will be used to control dust on the internal roads and county roads as needed. The crushing and screening operations will have water sprays to reduce dust. All water used at the site will be hauled from fire hydrant tap and the water will be purchased from the North Weld County Water District. The anticipated water consumption is 6,000 gallons per day during mining and crushing operations and significantly less during sales only days. Watering of the pit travel area and the mine access road will be accomplished using the water truck, which will have a minimum of a 2,000 gallon tank. Water for this operation will come from North Weld County Water District which is approved for industrial use. If another approved source is discovered, the division will be notified of the change in water source. 6. Schedule of Operations Mining operations will only occur as dictated by demand up to the maximum rates described • earlier in the mine plan. Mining, crushing, screening may take place in any of the 12 months out of the year but is only expected to operate for an approximate 3 months per year. Product will be sold throughout the year, although less material is expected to be sold in winter months. The operator will not have night gravel mining operations, although minor truck activity or repairs may occur after hours. 7. Haul Roads and Access The access road will head east from the processing and stockpile area where it will intersect with CR 37. The eastern 200' of this access road will not be reclaimed at the end of mining to allow access to the site. The access road will be a graveled road approximately 24 feet wide. The market is primarily the oil fields near Grover, CO but some material may also be sold to markets west of the site. • Lone Tree Pit, June 2009 D-6 • 8. Weld County Impacts and Environmental Impacts A Special Use Permit through Weld County will be needed for this operation and will be obtained prior to mining activities starting. Negative impacts to Weld County include a) truck traffic, b) noise, which is minimal due to the remote nature of this site, c) dust, all operations of the site are regulated by the Air Quality Control Division of the CDPHE, d) visual impacts, which was subject of a specific evaluation as part of the Special Use Permit. As described in the Exhibit G: Part 1, the hydrological system will detain runoff so that no sediment will leave the site and cloud any downstream waters. The Lone Tree Pit will be reclaimed to rangeland as shown on Map F. The operator will work closely with the County and the DRMS to ensure that the reclamation plan is the best possible for achieving the post-mining land use. There will be portable sanitation facilities on site but there will be no leach fields or other means of sewage disposal. All sanitary waste will be stored in a holding tank and hauled off site periodically. There will be no new demands on Weld County services from the extraction • areas. • Lone Tree Pit, June 2009 D-7 • RECLAMATION PLAN EXHIBIT E 1. General Reclamation Plan The total area of the permit is 40.02 acres. The permit has both disturbed area (35.91 acres) and undisturbed area(4.11 acres). The eastern portion of the access road is to be left in place for access to the reclaimed site. The reclaimed land use is shown in Table E-1. There are Cottonwood trees located in the previously excavated areas and will not be disturbed as part of mining or reclamation. Since the mining depth will stop 2 feet above the static groundwater level and overburden and topsoil will be replaced on top of the pit floor, no groundwater will be exposed after reclamation. Table E-1 Lone Tree Pit Reclamation Land Use Land Use Area (acres) Undisturbed Cottonwood Gallary 4.11 Access Road 0.2 • Reclaimed Rangeland 35.71 Total 40.02 Reclamation will be conducted as new areas are disturbed throughout the year. This will most likely happen in small increments a few times per year, with topsoil and overburden being placed in the previously excavated areas of the pit. See Map F for details. This will also help reduce the exposed land area which will reduce the reclamation bond. Overburden is expected to vary between 0 feet-3 feet. Excess overburden not used in road base will be used for subsoil. 2. Topsoil Replacement The amount of topsoil proposed to be salvaged and replaced is approximately 13,000 C.Y. as shown in Table D-1. All of the areas will receive topsoil replaced to a thickness of 2-6 inches. Portions of all mining areas will receive some topsoil from stockpiles. All other replaced topsoil will come from direct placement from surrounding mining areas. • Lone Tree Pit, June 2009 E-7 3. Haul Roads and Access The access road will head east from the facilities area where it will intersect with County Road 37. This eastern 200 feet of the access road will not be reclaimed at the end of mining to allow access through the site. The access road will be a graveled road approximately 24 feet wide. The cattle guard will also remain after reclamation. 4. Reclamation Timetable The timetable for reclamation is shown below in Table E-2. Reclamation Timetable Exhibit L: Reclamation Costs describes the worst case bond scenario. The approximate timeframe to mine and reclaim the Lone Tree Pit is 8 years. Table E-2 Reclamation Timetable Length of time to Year Comments complete (months) • 2010 Site Preparation,Topsoil stripping,build stockpiles along the CR 37. 2 2010- Mine in Mining Area 1,stockpile topsoil. Seed the stockpiles. Pplace any excess overburden on the areas hisoricaly mined in 39.6 2014 Mining Area 3. Mine in Mining Area 2.Directly place overburden and topsoil from 2014- Mining Area 2 on the pit flor and slopes of Mining Area 1 in areas 42.8 2018 that won't be used for processing and finished product stockpiles. Seed topsoiled areas. 2018- Mine in Mining Area 3,Strip topsoil and place it in Mining area 2, 2019 place the overburden encountered on the pit floor. Seed topsoiled 10.8 areas. 2019 Remove all equipment.Place topsoil from stockpiles on any 2.0 remaining areas. Seed and mulch in reclaimed areas. Total 97.2 • Lone Tree Pit, June 2009 E-8 • 5. Revegetation Plan The areas being reclaimed will be harrowed and drill seeded in the spring and fall with a mix consisting of the following in order to control erosion: Rangeland Mix Cultivar lbs. of PLS/Acre Buffalo Grass Texoka, Sharps Improved 3.5 Little Bluestem 2.5 Side Oats Vaughn, Butte, El Reno, Haskell 2.0 Blue Gramma Hachital, Lovington 3.5 Sand Dropseed 0.5 Fairway Crested Wheatgrass Ephriam 0.8 Smooth Brome Achenbach 2.0 Total 14.8 lbs/acre • These grasses have proven to do well in the dry environment of eastern Colorado. They will prevent erosion and do provide forage and cover for animals. Certified weed free hay or straw mulch will also be applied at the rate of 2000 lbs/acre. The mulch will be crimped into the ground to provide soil stabilization. 6. Post-Reclamation Site Drainage The major drainage feature in the post mine site is Lone Tree Creek which is an upland vegetated swale. This drainage receives water from several square miles but is dammed several times upstream from the site. The swale rarely has standing water in it and even more infrequently does it have any flow. The reclaimed slopes will flow to the pit floor and then to a small depression to allow Lone Tree Creek to still have an established channel. The reclaimed land will • be lower than the original channel invert and will create a shallow pool prior to discharging Lone Tree Pit, June 2009 E-9 • through the 5'culvert to the next downstream landowner. This shallow pool will allow any sediment to drop out prior to the flow leaving the site. Due to the very clean nature of this deposit, the onsite runoff will likely infiltrate into the surrounding groundwater as it does currently, therefore, there will be no issues with water rights. The flow directions of the reclaimed land are shown on Map F and are the same as the current site. 7. Weed Control The existing site has significant weeds on site. Russian thistle and tumble weeds are a very common source of weed infestation in the area. The Lone Tree Creek is a depression and creates a trap for the tumble weeds to accumulate to 2 feet deep in some areas. During mining the large infestations of weeds will be burned in place or hauled off site to a landfill. Revegetation of retopsoiled areas in a timely manner will be the primary defense against weed infestations. Initial supplemental irrigation will be used to aid in timely revegetation. Herbicides will be used on an as needed basis by a weed control contractor to control infested areas. Each year in the early • summer months, a weed survey will be conducted and will determine if burning and hauling off of weed debris is needed as well as the need for herbicide application. Any herbicide application will be done by professionals in conjunction with Weld County established control methods. 8. Revegetation Success Criteria Revegetation will be deemed adequate when erosion is controlled in an adequate manner, and the vegetation is considered satisfactory and stable to the Division. 9. Monitoring Reclamation Success Monitoring the reclamation on an ongoing basis will help to assure successful reclamation. The operator plans to use the local NRCS office to assist in determining the ability of the reclaimed land to control erosion and any other suggestions which may enhance the reclamation of the site. If minor changes or modifications are needed to the seeding and reclamation plan, revision plans • will be submitted to the Division as required. It is hoped that the Division will provide assistance Lone Tree Pit, June 2009 E-10 • in evaluating the success of the ongoing reclamation process. All areas disturbed and reclaimed and any other important items regarding the reclamation will be submitted in the annual reports to the Division. • • Lone Tree Pit, June 2009 E-1 1 RECLAMATION PLAN MAP EXHIBIT F Map F shows the final contours of the reclaimed area as well as the final land use. • • Lone Tree Pit, June 2009 F-1 FILE CONTAINS OVERSIZED MAP PLEASE SEE ORIGINAL FILE • WATER INFORMATION EXHIBIT G 1. Surface Water General Discussion Within the permit area, the major surface drainage is Lone Tree Creek. Lone Tree Creek will not be diverted as part of the mining operation. Excavation will be conducted within the channel and will ultimately lower the invert of the swale within the mining area. During large events where surface water is flowing in Lone Tree Creek, the depression left by mining will fill with water and the excess flow will continue as it does currently. Lone Tree Creek is dammed several times up stream of the site and very rarely has any flow. Any water trapped in the depression will infiltrate into the groundwater table since the pit floor is very sandy. All processing equipment will be stored outside of the channel and will not be impacted by any flows. 2. Hydrology and Sediment Control for Mining • Water that is encountered within the mining area will only be stormwater runoff. Groundwater will not be intercepted during mining. Runoff from off site will be allowed to enter the site as it does now but will enter a depression which will deposit sediment. All onsite stormwater will flow to the same depression left by mining. If the depression fills with water, the excess will flow through a 5' culvert under CR 37, as shown on Map C-2. This culvert will be the discharge point of the Stormwater Discharge Permit. Product stockpiles will be placed several feet above the invert of Lone Tree Creek. The access road will have a double cattle guard to help remove mud from the trucks tires, which will prevent tracking. 3. Groundwater The test pits did not reach the groundwater table, but from well data surrounding the site, the expected groundwater depth is expected to be 20 feet—25 feet below the natural surface. The adjacent excavation on Weld County Engineering property did not intercept groundwater at an approximate excavation depth of 17 feet. The excavation will stop 2 feet above the static • groundwater level and will then be covered with overburden and topsoil to further reduce the risk Lone Tree Pit, June 2009 G-1 • of impacting groundwater. Surface runoff will drain through the sandy material and become groundwater during mining and after reclamation. 4. Irrigation Water Initial vegetative cover may be initially irrigated with a water truck. The water for this irrigation will come from a fire hydrant within the town of Pierce. This water will be purchased from the North Weld County Water District. 5. Water Consumption for the Operation The site is expected to use approximately 6,000 gallons of water from this fire hydrant each day during mining and processing operations for dust control. Additionally during days of heavy hauling from the site road watering may be required as part of the road maintenance agreement with Weld County. All water will be purchased from North Weld County Water District. If a non-potable water source if found and is approved for industrial use, the water supply source • may change and the Division will be notified. • Lone Tree Pit, June 2009 G-2 . WILDLIFE INFORMATION EXHIBIT H 1) Significant Game Resources on the Affected Lands Antelope and upland ground birds such as pheasant are the most likely game resources to utilize the site. Due to the minimal vegetation on site and lack of available water near by, large animals do not frequent this area. The cottonwood gallery does provide good cover. 2. Significant Non-Game Resources on the Affected Lands Owls and other bird of prey use the cottonwood gallery as perching sites. No nests were observed during the May 4th 2010 site visit. Additionally there are small rodents and rabbits that live on site. 3. Seasonal Use of Affected Lands • This site is very dry year round. There are no sources of water on site. There is a small reservoir that provides year round water to local habitat approximately 1 mile south of the affected land. 4. Presence and Estimated Population of Threatened or Endangered species in the area. None. 5. Fish Resources None. S Lone Tree Pit, June 2009 H-1 • 6. General Effects of the Operation on the Existing Wildlife of the Area The cottonwood gallery is the most significant wildlife resource on the property and will not be removed as part of mining. The noise and general activity within the mining areas will make the cottonwood area less desirable while mining and processing is being conducted. This will occur a few months per year, and after mining is complete,the cottonwood gallery will be in the same condition as it is today. Wildlife will likely still use the site during the months that the operation is less intensive because the cottonwood gallery is one of only a few treed areas located within several miles. • • Lone Tree Pit, June 2009 H-2 • SOILS INFORMATION EXHIBIT I The soil survey performed by the NRCS covers the permit area. The soils mapping is shown on Map C-1. The associated soils type descriptions are enclosed in this exhibit. The primary soils of the site are: 1 - Altvan fine sandy loam, 0-6 percent slopes 12 - Bankard loamy fine sand, 0 to 3 percent slopes 29—Haverson loam, 0 to 3 percent slopes Topsoil will be used to reclaim as it is stripped, with the exception of the initial stockpile which will be used for final reclamation. As mining progresses and overburden is encountered, it too will be used immediately for reclamation. By reclaiming while mining, all soil will be salvaged as best as possible. • All topsoil piles will be seeded within a month after they are created with the same rangeland mix shown in the reclamation plan. It is expected that approximately 0-6 inches of strippable topsoil will be available from the disturbed areas. Since there was pre-law mining conducted within Mining Area 3, there is little topsoil available within Mining Area 3. Overburden will be placed as a subsoil and topsoil salvaged within Mining Area 1 and 2 with be distributed across all Mining Areas. • Lone Tree Pit, June 2009 I-1 0 0 10 .. O I' oIn o d 4 No. .c, w5 Zz z o z d 3 ` � o N N I o n I O 1 i o o n o o h M O 4 > g S m 8 8 8 S 8 8 c «p o o d a 6 o 6 Si C • tv CO O N A CO t` O _ G. a g to 8 8 8 w & 8 8 8 N 8 8 N 40• ` 1 0 8 8 8 4) 8 8 8 g Z Z M - r O to O O O O O O O ..:§ ,5k o 4 0G r o 0 0 0 0 0 0 • 0 �U O 3Z O w £ z t < < S r tV N Z gI < ≤ < < < h o I a i 0J H h 0 V 3 N M V S tV/l t/l (I) N N M V M a 11 i r ri c B 1" a W g , t �, � U U a. C � � c 8 E 'Q, � s 1I . i.£ t£ < < z Y c 2 o p 8 I o f N $ o 6 r =1 t o " a • m w 1 cog i Z0 s fe Q 0 B . �� ! . CL w il ilm X o6 5 1 a $ 2 5 ! i 8' 1 • F Lone Tree Pit, June 2009 1-2 • O b tv .9 o in i— a.Z Z Z a. 71 a 31 it h O N I I I el in A 4 ! § O n n 0 I d m C 3 g R 8 o 0 0 oO g O in in of 8i 6 6 03 40 g p 8 id, S 8 r n 8 72, n a aa E ` "e 8 8 8 8 a (1- a 8 : o z ,�, o u 0 d d d CO I E LL I 4 A g . o 0 0 0 0 0 it) V 3 < <r <r < < � ils N N< lY< r I (q Z < < < < < < a. ,. •' —u e yN %0OO h �� V V 1 . tn ma I • ti g" 1 i g T gg1. o 2 �9 2 me 1 II Z ✓ r' .? ri 3 a i e m A 8 a V $i tt e N : V T� o Z V -1 g • I $ 28 3 IIE� 1 ₹c' : E I it 2 � � . Al i F _ • 3 Lone Tree Pit, June 2009 1-3 • VEGETATION INFORMATION EXHIBIT J Existing Plant Communities See Map C-1 for vegetation communities. Vegetation within the permit area consists mostly of sparse grasses and short forbs. The cottonwood gallery in the southeastern portion of the site has dense trees with minimal grasses as ground cover. Beneath the trees, the ground is covered with leaves and tumbleweeds. The surrounding land is used for gravel resource and dry land farming. • Lone Tree Pit, June 2009 J-1 • Picture 1 J. r/ .. 19 x:• • ' y • • 1 .r +' Jr.*. • :..1.r rr 1 t • • 14;4.i -•T• t. v + ••, (Aar -1 ;. fir . .,,rsr , a . t^ ,h erg ) •'.4.114 '•- •_l.�a• Await I, ti ♦ .. I • cif .•T' 1 _ , _ 1 T T, ' yy, • la 666: :I.'..6.:''''.:4' 7 A It • f" . , ♦ St .� t • .o r1:'• `t9,♦ f ,,•Ll •. - a 46 4- r ‘,... • vat, wi- • 1`, .. 1 . 0 . • .y. ' 4 fir, ♦ • ti !' f r I' j 4 ' SSw l Picture was taken within Mining Area 1 showing typical vegetation of an area with overburden beneath the topsoil. The majority of the ground cover is litter due to the dry nature of this site. This picture was taken in May 2010. • Lone Tree Pit, June 2009 J-2 Picture 2 0 1 Ala 44. t I j1• ; ,' •a v ,k IS:nr j ''pl R • )4, 4♦Gt {, Y. r. II �'w 'aM ..(.'�S� yy ./.., t" `� $�k yr. * 1:: _ qR M,r V•' �•'f�g+�,7 tt :\� 1a�R 1� • (+! • � - • f. .. - • ... b ♦_ •y K R I v ?i. . ICl1<.*. Mr ,y/ „ r , 5 / of .JJ ,.ter � • , •.• 1 I• r� r •fir` .e• ''�. �;.le i ••' r 4' fr./ Y• l� f JV�yy > l ` 7 ♦ , ", , ;.1. ..` . .,M 4.• yea• •. • ;.' — \ • • '� ' t e e •�, • V. . s_ ILF•. 7 Al ?. ° • f��tr { ? , j. ` If. • • V • 1 lc r.Ha Jai 4 R 1... 1 • • ill ... t - , :f ', • • 4 y Y ., • ` \• • ^aa Icy - y y� .jIll r •` /•-• f h. @, • :.'•1 • Picture shows a common forb found on site in an area that has little topsoil and minimal overburden. Water availability is low in this portion of the site. Ill Lone Tree Pit, June 2009 J-3 • Picture 3 1 r 1 ` �i .. /` 1 + .�stTI'1 r • a irtseedsi: 3/4.... 1 ti ' 1y':F .7e. I "Hi*. • 4./ 9:-.1+• �.' %...a. 777 J. f i . ,It , `, . if A, i . hi e.: , i, :.,1 , ..A.a te. .‘ .. . . ...,,.. • 1r •d • • ' ,. ' •r 1 �" rte ' ,. - . � 'i '. ••ti \ 1 '. `r N•7. •. ` _ 'a . t VI $?• ••1 • 4INci 1 ft 'lb ,4a, . • .?- A r •'Ai ' - -a 11 .7 e i '1 )4„., - is.; .. { • . 1rt 14 lit , 11/410• N. - t.. . .;;\ , , .• \„ ; - • •• Akt ;• A.-'Lt , .• -/ \'.\` •.' .•- I� • i 9 : �` 'i a •..� 4, v. in tee t . -0 i ..**101/2., ..s: . 44‘4• 1, • - 1. S _T/..• •4 x•,. 71 !,' '�ft • •w r • i �1 ♦ • l This picture is looking north through the cottonwood gallery in the southeastern portion of the site. This area has small areas of vegetated ground cover. The remaining areas have leaves and tumbleweed cover. • Lone Tree Pit, June 2009 J-4 • Weed Control The existing site has significant weeds on site. Russian and thistle tumble weeds are a very common source of weed infestation in the area. The Lone Tree Creek is a depression and creates a trap for the tumble weeds to accumulate to 2 feet deep in some areas. During mining the large infestations of weeds will be burned in place or hauled off site to a landfill. Revegetation of retopsoiled areas in a timely manner will be the primary defense against weed infestations. Initial supplemental irrigation will be used to aid in timely revegetation. Herbicides will be used on an as needed basis by a weed control contractor to control infested areas. Each year in the early summer months, a weed survey will be conducted and will determine if burning and hauling off of weed debris is needed as well as the need for herbicide application. • • Lone Tree Pit, June 2009 J-5 • CLIMATE INFORMATION EXHIBIT K The following climate information is presented for Nunn, Colorado. The elevation of Nunn is approximately 5190 feet above sea level. The Lone Tree Pit is located approximately 2 miles southeast of Nunn at an approximate elevation of 5070 feet. Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Average Max. 41.1 43.9 52.2 61.0 70.2 81.7 88.5 86.6 77.1 63.3 48.9 41.0 63.0 Temp (F) Average Min. 11.3 14.0 22.8 29.9 39.9 49.2 54.6 53.3 43.2 31.2 20.2 12.0 31.8 Temp (F) Average Total 0.36 0.26 0.91 1.30 2.35 2.11 1.93 1.39 1.05 0.85 0.56 0.22 13.30 Precip (in.) Average Total 5.9 5.1 7.9 4.2 0.4 0.0 0.0 0.0 1.1 1.7 7.0 4.8 38.1 Snowfall (in.) S • Lone Tree Pit, June 2009 K-1 • RECLAMATION COSTS EXHIBIT L The worst case reclamation scenario takes place at the end of Mining Area 2. This is the worst case since all areas have been disturbed by both pre-law operations and the permitted mining of the site. The rib left by previous operators will need to be graded and the most amount of topsoiling and seeding will be required. 1. All of the facilities area will need to be reclaimed at this point which will include the concrete foundation of the truck scale and removing the mobile structures. 2. All slopes are mined to the reclamation slope of 3H:1 V but will need minor grading to be ready for overburden and topsoil placement. The approximate length of finish grading needed is 3,000 feet. The total area of slope finish grading is 3.7 acres. 3. In the area of historical disturbance, there is a rib that was left by the earlier operator • which has 1H:1V V slopes. This rib needs to be graded to 3H:1 V and topsoil applied to the slopes. The volume of material that needs to be moved is 1,000 C.Y. 4. Ripping 20 acres prior to topsoil placement. 5. Topsoil needs to be placed on approximately 20 acres, which will come from the stockpile located on the eastern portion of the site. 6. Seeding and mulching of 20 acres that were recently topsoiled. 7. Supplemental irrigation on newly placed seed. • Lone Tree Pit, June 2009 L-1 . Worst case reclamation costs for this scenario are shown in Table L-1: Table L-1 Reclamation Task and Cost Estimate Activity Description Time (Months) Cost ($) Remove scale, and mobile equipment. 0.10 $4,000 Fininsh grading slopes to 3H:1V 3.7 acres @ $1,000 per acre 0.10 $3,700 Regrade historical disturbance from 1H:1V. 1,000 C.Y @ $0.50 per C.Y 0.05 $500 Ripping of 20 acres @ $200 per acre for topsoil prep 0.10 $4,000 Haul 6,000 C.Y of topsoil from stockpile and distribute on 20 acres. $1.20 per C.Y 0.10 $7,200 . Seed and mulch all disturbed areas. Drill seeding and crimp mulching will be employed @ $1100/acre x 20 acres. Initial irrigation by water truck. 0.20 $22,000 Totals 0.65 $41,400 DRMS Costs (21% x direct costs) $8,694 Total Bond Amount $50,094 • Lone Tree Pit, June 2009 L-2 • OTHER PERMITS AND LICENSES REQUIRED EXHIBIT M The following permits are needed for the site: 1) County Use By Special Review—A Use By Special Review Permit from Weld County will be applied for after the DRMS Permit is issued. As part of the County permit a building permit and access permit will likely be required. 2) Stormwater Discharge Permit—A Stormwater Discharge Permit will be applied for through the Colorado Department of Public Health and Environment—Water Quality Control Division. 3) APEN—A fugitive air emissions permit is needed from the Colorado Department of Public Health and Environment since the site will mine more than 70,000 tons per year. Air emissions • permits will be in place for all portable equipment utilized on site which requires a permit. The APEN has not yet been submitted. 4) No USCOE 404 permit will be necessary because no wetlands or waters of the U.S. will be disturbed. See the attached letter from USCOE. • Lone Tree Pit, June 2009 M-1 1 DEPARTMENT OF THE ARMY CORPS OF ENGINEERS. OMAHA DISTRICT DENVER REGULATORY OFFICE, 9307 S. Wadsworth Boulevard LITTLETON, COLORADO 80128-6901 May 5,2010 Mr.Ryan Ellis Greg Lewicki and Associates 11541 Warrington Court Parker,CO 80138 RE: Lone Tree Gravel Pit,Upland Vegetated Reach of Lone Tree Creek Corps File No.NWO-2010-947-DEN Dear Mr.Ellis: Reference is made to your May 4,2010 site visit with Mr.Terry McKee of my office concerning the above-mentioned project located in the NE V.of Section 12,T8N,R66W,Weld County,Colorado. This project has been reviewed by Mr.Terry McKee of my office in accordance with Section 404 of the Clean Water Act under which the U.S.Army Corps of Engineers regulates the discharge of dredged and fill material,and any excavation activity associated with a dredge and fill project in waters of the United States. A Department of the Army(DA)Permit will not be required for gravel mining at this site,which • includes the upland vegetated reach of Lone Tree Creek and the upland"rib"area near the south portion of the project site. Although a DA Permit will not be required for the mining project,this does not eliminate the requirement that other applicable federal,state,and local permits be obtained as needed. If there are any questions call Mr.Terry McKee of my office at(303)979-4120 and reference Corps File No.NWO-2010-947-DEN. Sincerely, • Timor'T.Car Chief; gulato ff tin • Lone Tree Pit, June 2009 M-2 • SOURCE OF LEGAL RIGHT TO ENTER EXHIBIT N The surface and mineral owner of the property is Miller Family Investments. The property deed is included. S Lone Tree Pit, June 2009 N-1 • 0g/07/2010 13:52 FAI ®000 eRecorded In Weld County,CO Doe Id:3897085 06102 1101 0 04:92 P Total Fag:68.00 Page:1 of 1 Steve Moreno, Clerk and Recorder MDvaRa.DEED (With Limited Warranty) Stew Coleman Catalyl Weld Greaten Terry YWnaglove T.Y. 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This Dead is signed by(kaolin as via date of e#aowingteral Organs Sputum below,bid Is affective Par ea sperm es of the Ctbinve Date stated sow. r-Z/- 2D( 0 C Goa r ' INDIVIDUAL ACIGI LEDGMONT L3/4 STATE/COPAMONWMALTHOF Cabman . . d rnuNrr Of Ifs •_... 6 r Ba om me nadenigad aaierrity, at ids day pereaspy appeared eon . ✓q/,✓.U.Y7 �-- , karwo to me to be dm permits) whom emu ere '1. subscribe In bre.olaa ad aokawt bpd to me that Mahe eaacaed the ord�w� tl9d for do purposes and ansiJcSlm Ihela'io awned.(live udder my Mad sib teal of office is .lay tad Ad¢^ 2010. U fC� "'PGeI,�, , /I�{ /�/�y�,��s') BARONRODJ , (116" ;Plitt ' ; . a • �C()ANRDD; 1 r` / teastaisS Lone Tree Pit, June 2009 N-2 • 01/07/2010 13:31 FAI I Wen .Rscord.d in Weld County,f.0 Doc d:3WD70M 001033010 04:33 P S ~.577.00 Stow Mar.no Clock d'Reoonder S an . WARRANTY DM ! 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The paaae(.I uat ad all WARRANT AND!DINER DEFEND br.bn 4wpiadpea.aa legal ea paean peas Yew dra*law an W Mips.wawa ad every e•nn of eelaplt la.M r ;knit,ea MIS erne port Mint The seer swan dad Shoe 1.plonk in pod S Sabo W the as of ay prier hat be make**a pear. IN W71NW WRNRROP.W purer*named W.Na a the in Y Ned,.ben. Twee Sidle C I Is. Dowry Of Wud I The hnpW Swan w as..lfy li.1011,by TeerryTYTemiailevn. /�T/ l it 3.aypow �i C ) Lone Tree Pit, June 2009 N-3 • 00/07/2010 13:51 FAX 10005 • eReearew in Wald CYUnq,CO Doe M:3687006 00432/2010 04A7 p Pape Steve 1 d w:f8.00 Moreno Clerk and Recorder•met ash*hwt7.Gedloa(aid ti l id AYR Mn C.Lade.O10141 Camp EriargrataaajnoRaz I. The Sincerest or Authority retain ss at entity named: MILLER FAMILY INVESTMENTS,,LL COLORADO LOOTED LIABILITY COANY 1. The Entity tsa lia3. The Entity is termed Yoder the Iwo e0 COLORADO 4. The mailing address for the entity is 1182ND STREif,UNIT C,LASALLE,CO BONS S. The awe led position of sock peace wdheesed to amore instruments conveying, onountbsring,or BRADY D.D.MILLER.MANAOR1ise ateareso MEMBER on behalf of 6e entity ice. 6. Theo the fggpne WrewW a brad the army(s1 u rot Umlood 0 ts limited • 7. Other matters m0pmng the manner in whisk the entity deals with imawb Ni real pssp07 • O. This Maass ofAnhatlry is oseerttd is Walt etdr Emily pursuant to Or provisions *fat.%Section{30.30.172. • It May 2010 • BRADY D. • • STATE OF:Colia4 COUNTY OFn WELD The tunguly emwY.Y wwwwwwlydpd bait err Or lay of May,ale,by:RkADY 0.MILLER Witness my hand mdwrl, • 6 1.9114/ My ermnlnslea*hi �� /I � tZ Lone Tree Pit, June 2009 N-4 • OWNERS OF AFFECTED LAND EXHIBIT 0 OWNERS OF MINED SUBSTANCE The mined substance is sand and gravel. No other lands will be affected by the operation. The surface and mineral owner of the property is: Surface Owner Miller Family Investments, LLC 10614 Highway 66 Platteville, CO 80651 Mineral Owner Miller Family Investments, LLC 10614 Highway 66 Platteville, CO 80651 . 411 Lone Tree Pit, June 2009 O-1 MUNICIPALITIES WITHIN TWO MILES EXHIBIT P There are no towns within 2 miles. • Lone Tree Pit, June 2009 P-I • PROOF OF MAILING NOTICES TO COUNTY EXHIBIT Q COMMISSIONERS & SOIL CONSERVATION DISTRICT Notifications and accompanying permit forms have been sent to the West Greeley Soil Conservation District and the Weld County Commissioners. Please see attached return receipts. West Greeley Conservation District 4302 W. 9th St. Rd. Greeley, CO 80634 (970) 356-8097 • (970) 351-0392 Fax Weld County Commissioners 915 Tenth Street P.O. Box 758 Greeley CO 80632 Phone: (970) 336-7204 Fax: (970) 352-0242 • Lone Tree Pit, June 2009 Q-1 NOTICE OF FILING APPLICATION FOR COLORADO MINED LAND RECLAMATION PERMIT FOR REGULAR(1121 CONSTRUCTION MATERIALS EXTRACTION OPERATION NOTICE TO THE BOARD OF SUPERVISORS OF THE LOCAL CONSERVATION DISTRICT West Greeley DISTRICT tear Family Investments,LLC (the"Applcaot/Operator")bas applied fora Regular(112)reclamation permit from the Colorado Mined Land Reclamation Board(the"Board")to conduct the extraction of construction materials operations in weld County. The attached information is being provided to notify you of the location and nature of the proposed operation. The entire application is on file with the Division of Reclamation,Mining,and Safety(the"Division")and the local county clerk and recorder. The applicant/operator proposes to reclaim the affected land to Renaaaad use. Pursuant to Section 34-32.5-116(4Xm),C.R.S.,the Board may confer with the local Conservation Districts before approving of the post-mining land use. Accordingly,the Board would appreciate your comments on the proposed operation. Please note that, in order to preserve your right to a hearing before the Board on this application,you must submit written comments on the application within twenty(20)days of the date of last publication of notice pursuant to Section 34-32.5-112O0),C.R.S. If you would like to discuss the proposed post-mining land use,or any other issue regarding this application,please contact the • Division of Reclamation,Mining,and Safety,1313 Shaman Street,Room 215,Denver,Colorado 80203,(303)866-3567. NOTE TO APPLICANT/OPERATOR: You must attach a copy of the application form to this notice. If this is a notice of a change to a previously filed application you must either attach a copy of the changes,or attach a complete and accurate description of the change. • Lone Tree Pit, June 2009 Q-2 0 U. S . Postal Servicet ,>> CERTIFIED MAIL , ►n RECEIPT D (Domestic Mail Only; No Insurance Coverage Provided) cO co For delivery information visit our website at www.usps.comc CI GREELEY C0. 80634 . ru Er" Postage $ $4.90 ' I 0303 4 tit\IMEri Certified Fee $2•�0 ` ., 12 ,� . 4 Return Receipt Fee • 4r , i psi �Mf+-} e i S t OO (Endorsement Required) $2.3 ,, � 1 ` fie e Restricted Delivery Fee i (Endorsement Required) $0 . 064,, ■ r D . Total Postage & Fees $ $10 .00\46/08/2010 16/08/2010 D Sent To kitif /,Walt.£ac1 D Street, Apt. No.: D or PO Box No. t3&Q ?j'c Sit ( Rd City, State. ZIP4-4 1 1r • PS Form 3800. August 9 .006 See Reverse far Instructions U. S . Postal Service CERTIFIED MAIL , , RECEIPT .,.n (Domestic Mail Only; No Insurance Coverage Provided) c7 For delivery Information visit our website at www.usps.com„; O .. . GREELEY CO 80632 *. . . . _z ":17: rvI.in'Q— Postage $ $4.90/ a. 0303 .tii, L ! 4 Certified Fee $2 0 12 CM p Return Receipt Fes' Pla' T - 8 It ) D (Endorsement Required) $6. „iiO Restricted Delivery Fee (Endorsement Required) $0 ■- © I — ^ 1 p, Total Postage & Fees $ $10.00 �:_ 06/08/2410 , ci Sent To .,...wJ, 1J ,� iy� 60 , _ . . . , I C3 Street, Apt. No. • T . / C' . _7o7.fl' Ne City, State, ZIPS , • , . t O 16 �' .7 3e • PS Form 3800, August 2UUl, See Reverse for instructions Lone Tree Pit, June 2009 Q-3 NOTICE OF FILING APPLICATION FOR COLORADO MINED LAND RECLAMATION PERMIT FOR REGULAR(112)CONSTRU ON MATERIALS EXTRACTION OPERATION NOTICE TO THE BOARD OF COUNTY COMMISSIONERS Weld COUNTY DAIS Nally nwwmaxr,uc (the"Applicant/Operator")has applied for a Regular(112)reclamation permit from the Colorado Mined Land Reclamation Board(the"Board")to conduct the extraction of construction materials operations in weld County. The attached information is being provided to notify you of the location and nature of the proposed operation. The entire application is on file with the Division of Reclamation,Mining,and Safety(the"Division")and the local county clerk and recorder. The applicant/operator proposes to reclaim the affected land to arnurasa use. Pursuant to Section 34-32.5-116(4Xm),C.R.S,the Board may confer with the local Board of County Commissioners before approving of the post-mining land use. Accordingly,the Board would appreciate your comments on the proposed operation. Please note that,in order to preserve your right to a hearing before the Board on this application,you must submit written comments on the application within twenty(20)days of the date of last publication of notice pursuant to Section 34-32.5-112(10),C.R.S. • If you would like to discuss the proposed post-mining land use,or any other issue regarding this application,please contact the Division of Reclamation,Mining,and Safety,1313 Sherman Street,Room 215,Denver,Colorado 80203,(303)866-3567. NOTE TO APPLICANT/OPERATOR: You must attach a copy of the application form to this notice. If this is a notice of a change to a previously filed application you must either attach a copy of the changes,or attach a complete and accurate description of the change. • Lone Tree Pit, June 2009 Q-4 • PROOF OF FILING WITH COUNTY CLERK EXHIBIT R Please see attached return receipt. • • Lone Tree Pit, June 2009 R-1 i • • Lone Tree Pit, June 2009 R-3 • Adjacent Property Owners Map Referance Parcel Number Landowner Mailing Adress Number 1 055312000009 Miller Family Investments 10614 Highway 66 Plattevilee, CO 80651 2 055312000008 RC Land Inc 13415 CR 88 Pierce, CO 80650 3 055301000010 Weld County 915 10 St Greeley, CO 80631 4 05516000002 Jacob E. Varra 9080 CR 102 Nunn, CO 80648 5 055107000019 Leroy A. & Peggy J. Bellmore 13480 CR 100 Nunn, CO 80648 6 055107000003 Weld County Engineering P.O. Box 758 Greeley, CO 80632 • • Lone Tree Pit, June 2009 R-4 • PERMANENT MAN-MADE STRUCTURES EXHIBIT S The following is an inventory of man-made structures within 200 feet of the disturbed area. All of these structures are shown on Maps C-1, C-2, and F. The landowner boundaries are shown on Map C-1. The damage waivers for these structures are included in this section and are signed and notarized by the operator. The signed damage waiver was sent to the Owner(Weld County) and no correspondence was received pertaining to the damage waiver. Phone calls to the Weld County were not returned pertaining to the Damage Agreement. 1. CR 37 and 96 with associated 5' culvert owned by Weld County 2. Onsite fences and livestock shelter owned by Miller Family Investments, LLC • • Lone Tree Pit, June 2009 S-1 41111 Damage Agreement Between Miller Family Investments,LLC And Weld County Lone Tree Pit This Agreement entered into between Miller Family Investments,LLC and Weld County provides that Miller Family Investments,LLC agrees to provide compensation to Weld County for any damages to the Weld County owned CR 37,Culvert under CR 37 and CR 96 caused by mining at the Lone Tree Pit. Mill Family Investment,LLC By "�—�_ Brady Miller I l^ The foregoing instrument was acknowledged be for me this day of June,2010,by Brady Miller. _ • Y. i Notary Public S %• p•;�� My Commission expires: ;C!.Y: c.:1 rG 1�t Weld County By David Bauer The foregoing instrument was acknowledged be for me this day of June,2010,by David Bauer. Notary Public My Commission expires: • Lone Tree Pit, June 2009 S-2 • RULE 1.6.2(1)(b) EXHIBIT T Prior to the submittal of the application, a sign was erected at the entrance to the site which contained all the required information regarding Rule 1.6.2(1)(b). Please see enclosed sign certification. S S Lone Tree Pit, June 2009 T-1 • Notice This site is the location of a proposed mining operation named the Lone Tree Pit.Miller Family Investments,LLC,whose address and phone number is 10614 Highway 66 Platteville,CO 80651,has applied for a Reclamation Permit with the Colorado Mined Land Reclamation Board.Anyone wishing to comment on the application may view the application at the Weld County Clerk and Recorders Office; 1402 N. 17th Ave Greeley, CO 80631,and should send comments prior to the end of the public comment period to the Division of Reclamation,Mining,and Safety, 1313 Sherman Street,Room 215, Denver,Colorado 80203. Certification NI I(ft' tereby certify that I posted a sign containing the above notice for the proposed permit area known as the Lone Tree Pit,on June /.5—,2010 -S.Lio.t f lu SIGNATURE DATE • Lone Tree Pit, June 2009 T-2 • GEOTECHNICAL STABILITY EXHIBIT EXHIBIT U There are no buildings or any structures outside the permit area which could be affected by the excavation. A minimum 30 foot buffer will be maintained from the permit boundary line to all excavations. The permit boundary on the eastern and northern boundary is the ROW for CR 37 and CR 96. All reclaimed areas will be restored to relatively flat (<3.5%) slopes except for the side slope, which be mined to a 3H:1V and reclaimed to a 3H:1V slope. The surface material of these slopes will be topsoil and the slope will be undisturbed sand and gravel. Design factors In the extremely remote case that a slope failure would occur, if the slope failed up to CR 37 (the closest man made structure to the operation), Figure U-1 shows the slope angle that would occur. The horizontal distance from the edge of the excavation to the ROW is 30 feet. The failure angle would be 9 degrees or 6H:1 V. This angle is far milder than normal failure angles in material that • gets strength from internal angle of friction. Figure U-2, from Stability Analysis of Earth Slopes, Huang, shows typical internal angles of friction for various materials. Assuming that the gravel is classified as SP, Poorly graded clean sands, gravelly sands, this material has an internal angle of friction of approximately 37 degrees. • Lone Tree Pit, June 2009 U-3 • The Factor of Safety(FOS)for gravel with a 9 degree slope in SP classified material with an assumed internal angle of friction of 37 degrees can be approximated by ignoring the cohesion component of the stability and simply evaluating the internal angle of Motion as follows: Tangent of Internal Angle of Friction FOS Tangent of Actual Angle of Failure Surface Tan 37° .7535 FOS= .15$4 4.8 Tan 9° This factor of safety far exceed the normal long term safety factor of 1.3,therefore,the plan of extraction,as presented in Figure U-1,is acceptable.The material within the slope will consist of undisturbed sand and gravel. • I,Greg Lewicki,P.E.with over 29 years in mine slope safety analysis in Colorado,certify that the mining and reclamation plan presented in this application will lead to stable slopes during and after mining and that there is no realistic threat of failure or to the stability of any structures outside of the permit area. /�// gE� �./i2Tade:OC- . . Greg Lewicki,P.E.ti 14 s' %,; P.E.#20335 sossb 6/i/ic Alitcr ' Date: R Al Lone Thee Pit,March 2009 U-4 • Lone Tree Pit, June 2009 U-4 • Figure U- 1 CR 3/1 ROW Falure Analysis of Mined Slopes 317 Offset of minlr1Q slope from CR 3r ROW Mining and Roclometion Sinpl 3H. 1V NNN .... - Felure Une if it accurst to the CR 37 ROW 811:1V 1 S" 20' Depth of Mining • Lone Tree Pit, June 2009 U-5 • IFSR r kilt; N4U.1, N • NN • A A AA � nr�rZr nnn � e� � 0 Egg s $ 8 liar ciR^aas ri ciddi — g s odoodo cc; f • . . 888p6p =p=pp--p � �p y i J b • 1 H N N N N N M • Y M I6 z. -w X6 ddoododo d - 3.;4' ;'; ' nn no � n �nr «« ____ 1'4 Odd3pn •i F • N N N N M M N N M N pF V V V V . . . . ." --, • -- II a ri rV t ri L P N A4 I Flit - N M M N M N N M • N M I• 1i!!1IiIidb .r . . lv, !- g 111111111421!u1 P vi i Ilitililh1hi Ell1‘i -fic,iiiif li 11" 11111111 ' 5� �j y it g,tg8e,N3gulddi5E ii . Figure U-2 (Stability Analysis of Earth Slopes, Huang) Lone Tree Pit, June 2009 U-6 • Greg Lewicki And Associates 11541 Warrington Court Phone(303)346-5196 Fax:(303)-346-6934 Parker,CO USA 80138 E-Mail:infora)lewicki.biz June 4, 2010 Weld County Clerk and Recorder 1402 N. 17th Ave. Greeley, CO 80631 (970) 353-3840 Dear Clerk and Recorder: Enclosed is an application for the 112 gravel permit for the site known as the Lone Tree Pit • located approximately 3 miles northeast of the town of Pierce. The permittee is Miller Family Investments, LLC. This application needs to be placed on public file. The Colorado Division of Reclamation, Mining, and Safety needs evidence that you received this application. Therefore, please sign and date the box below, then fax this page to (303) 346-6934. Sincerely, Ryan Ellis Greg Lewicki and Associates (303) 880-6690 This application was received on the following date: ! i 'i By: --TEnyk. b 15r) 21 LU A 11 23 Lone Tree Pit, June 2009 R-2 Hello