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Home My WebLink About20071139.tiff STATE OF COLORADO DIVISION OF MINERALS AND GEOLOGY - .�. Department of Nannat RL_ourua P void oi / - �„aN(t/ Cfkil5anel 1313T+erroanSL.Room 215 Illz •! �hl nCOLORADOCt Denver,Colorado 80203 5 t, 2�14nc ✓9'7F'jq sPhone:(3031 86x356: SFAX:'3031332dtO6 I --(15 YYN5 February 11,2005 gal Owen> Ms. Suzanne Janzen 2osell George Lafarge West, Inc- r..-An-ran:tror 10170 Church Ranch Way, Suite 200 Ronald IV.Callan- • Westminster, CO 80021 CK,hit.11 D n L,, 't'nual terJlvr<e Tnntcc RE: Adequacy Review,Lafarge West,Inc, Permit Amendment, Riverbend Operation, 112c Permit Amendment 0l,Permit No. M-2000-016 Dear Ms. ]anon: The Division of Minerals and Geology(the Division) has received your application for the Riverbend Reclamation Permit Amendment and has reviewed the application for adequacy issues. The Division has received formal objections to your Amendment application; therefore the Division is required to make a recommendation to the Mined Land Reclamation Board (NLRB) three working days prior to a Pre-Hearing Meeting. This meeting has becn scheduled for March 3, 2005; therefore, the recommendation must be issued by February 25, 2005. The Division requests that your response to the following adequacy review concerns should be received by the Division by February IS, 2005 in order • to give the Division some time to review the responses. The Division's comments/concerns are as follows: 1-Exhibit C— Pre-Mining and Mining Plan Maps a) Since this application is an amendment to an existing permit,M-2000-016,the Riverbend Operation,and will incorporate a second active pit, M-1985-088, the Fort Lupton Pit, into the amended area, the Division is requesting that the applicant provide a map showing the • boundaries of the two currently permitted sites and their correlation with the areas to be incorporated into the Riverbend permit through the amendment process. This could be done by adding the requested information to the current Exhibit CI Pre-Mine Map. h) The legend on the Exhibit C3 Mine Plan Map indicates that the purple dashed line with two dots between each dash represents lateral ditches. In the northeast corner of Phase 3 on this map there are purple dashed lines with only one dot between each dash. What does this symbol represent? c) An examination of the Mine Plan Maps shows severai locations, especially within Phases 4 and 6. where the topsoil/overburden stockpiles are located within 20 or 30 feet of the South • r".ncn Lrna Rcnam:eon 0-nice e� CobraGc Gemogiry 5-_n.n. 2007-1139 Letter to Lafarge West.Inc. 2 February 11_2005 Platte River channel and along the outside edge of a river bend. How will these stockpiles be protected from undercutting at the toe of the stockpiles during high flows,and how will the river be protected in the event that the stockpiles may erode or slump into the channel? 2.Exhibit D-Mining Plan a) On page 12 of the Application, in the"Mining Plan section"it is stated that there are concrete and asphalt plants on the site; it is assumed that a fueling lubrication station will also be located on the site. 'What protection measures will be used to ensure that spills of asphalt and/or concrete materials will not contaminate the surface or ground water? Will concrete trucks be washed-out at the site? If so, what measures will be utilized to contain the wash water? In the event of a spill what measures will be taken to capture the spilled fuels/lubricants. Any protective berms should be designed to contain 100%of the volume of stored material. The Division recommends that the storage area(s) be located outside the floodplain. If it is necessary to have storage areas within the floodplain, the applicant must also describe protection measures that will be employed to contain the materials in the event of a flood. b) If any of the concrete batch plant, asphalt plant or fueling lubrication station structures are permanent installations, e.g. on concrete foundations, their location, size and type of construction must be provided in the application so the Division can include a demolition cost in the financial warranty calculation. Please provide this information. 3. Exhibit G Water Information and Additional Hydrologic and Geotechnical Information A copy of a separate review of these issues is enclosed. Please see the attached memo from Kathleen Sullivan P.E., of the Division. 4.Exhibit H Wildlife Information and Exhibit C Mine Plan Maps a) A review of the mine plan maps shows a 200 foot setback from the mining limits to the South Platte River, but also shows disturbance boundaries which are much closer to the river, in some areas possibly as close as 20 to 30 feet, including the location of topsoil/overburden stockpiles. In the comment letter from the Colorado Division of Wildlife (DOW), dated January 21, 2005, it is stated,"To order to protect the riparian area and the diversity of large and small mammals, birds, and herptiles that inhabit the site, a 200' setback from the western shoreline of the river is recommended_ It is also recommended to keep as many of the mature cottonwoods as possible, and leave snags where feasible." Please submit a plan to leave a 200 foot undisturbed riparian corridor between the disturbed area and the riverbank and describe how this area will be protected from any accidental disturbance_ Also describe what number (or areas) ofmaturc • Letter to Lafarge West,Tnc. 3 February 11, 2005 cottonwoods will be protected and how they will be protected. It has been shown that • groundwater dewatering can kill cottonwoods. Will the operator take measures to prevent the killing of cottonwoods through groundwater dewatering? If so,please describe these measures. b) A copy of the January 21,2005 DOW comment letter is enclosed. Please respond to their concerns regarding: • i) Bald Eagle winter night roosts. • ii) Perch buffers and leaving a portion of Prairie Dog Colony A intact for a food • supply for raptors, - iii) The need for a Black-footed Ferret survey and a March I-October 31 survey for Burrowing Owls. iv) The question of the need for a survey for the presence of Mountain Plovers. 5.Proof of Notice As noted in the Division's December 9, 2004 "Receipt of Amendment Application"letter sent to Mr.Eric Reckentine of Lafarge West, Inc., "Proof of notice and mailings, such as Certified Mail-Return Receipt Requested,must be submitted to the Division of Minerals and Geology prior to the decision date." In this case, since the application has received objections, the Division will not make a decision but will make a recommendation to the MLRB, the proof of publication and other notices must be submitted prior to the recommendation,which is scheduled for February 25, 2005. 6. Additional comments a) The Division wishes to point out to the applicant that since this is an amendment to an existing permit,all commitments,requirements and stipulations that were incorporated into the original permit are also applicable to the amended areas. b) On the Mine Plan Maps there is a note (Notes- al) that "The mine cell location and limits arc conceptual, their size and shape may vary due to geologic and/or site conditions." Please • change all maps to remove references to "conceptual"plans, the Division cannot accept or approve`conceptual"submittals. The Division also requests that the statement "These phases are neither representative of the maximum area of disturbance nor do they limit disnubance to a single phase."removed from the application documents since such a statement makes the phasing and associated bonding difficult or impossible to regulate. Changes to the approved permit or amendment must be done by submitting a revision or amendment to the Division and obtaining the Division's approval. Letter to Lafarge West, Inc. • 4 February 11,2005 c) The Division has provided the applicant with two objection letters. Please respond to Peterson Energy Management Inc.'s concern regarding setbacks, and the Morton and Stevens' letter concerning legal right of entry. • Pleased be advised that the Aggregate Industries-WCR,Inc. 112c Amendment Application may be deemed inadequate,and the application may be recommended for denial on February 25,2005,unless the above mentioned adequacy review items are addressed to the satisfaction of the Division. If you feel that more time is needed to complete your reply, the Division can grant an extension to the • decision date. This would be done upon receipt of a written waiver of your right to a recornmendation to the Board by.the February 25,2005 deadline, and a request for additional time. This must be received no later than February 25,2005. If you have any questions,please do not hesitate to call My telephone number is(303) 866-4062. Sincerely, Gregg R Squ Environmental Protection pecialist ENCLS: Kathleen Sullivan's Memo, Re: Water Information DOW Comment letter of January 21,2005 cc: Carl Mount,DMG (via electronic transmission) Andy Peterson, Peterson Energy Management,Inc_, Objector Margaret Morton, Robert Stevens and Larry Stevens, Objector INTEROFFICE MEMORANDUM COLORADO DIVISION OF FUNERALS AND GEOLOGY 1313 Sherman St,Rm.215 Dcmcy CO 8.0203 7O: Gregg R. Squiretd,e,te&Le_. FRONT, Kathleen L. Sullivan,P.E. SUBJECT: M-2000-016, Lafarge West, Inc.: Riverbend Operation,AM-01 - • DATE: February 11, 2005 CC Barry Posey,OMG(via a-mail):Kate Pickford,DMG(via e-mail) This memo contains adequacy review comments from the Division's hydrology and slope stability review of the Lafarge West, Inc_ Riverbend Operation 112(c) Amendment (AM-01) Application, File No. M-2000-016. The applicant may contact me with any questions at (303) • 866-4060. 1. The applicant should be aware of and acknowledge that Stipulation No. 1 to the original permit M-2000-016. regarding the 400-feet setback from the top of the bank of the South Platte River, will remain in effect for and apply to the amended area. Maps showing mining within 200 feet of the riverbanks need to be amended. Alternatively, as stated in the stipulation, providing the Division an adequate evaluation "of the stability of riverside berms to be left at the conclusion of mining"could allow mining closer than 400 feet. 2. All maps must be amended to show all water features and other relevant features, especially the continuity of creeks, rivers, and ditches that may be affected by this operation, even if they are more than 600 feet from the proposed permit boundary. For example, on Exhibits Cl, C3, and F2, show the South Platte as it runs through the Olgilvie and Von Struve properties of Section 18 and Othe Fort Lupton Bottom Ditch and Big Dry Creek through the lower half of Section 13 • 3. The applicant must ensure compliance with all other agency requirements for the expanded operation, such as updated Substitute Water Supply Plan approvals and current Well Permits, CDPS permits, etc. prior to engaging in related operations at the site. Rule 6.4.4 EXHIBIT D— Mining Plan 4_ The submitted mining plan indicates that water resulting from dewaterina and storm water runoff will be discharged into the South Platte River, Big Dry Creek, or into the Lupton Bottom Ditch or the Brighton Ditch, or into adjoining cells. The applicant must indicate what factor(s) will determine whether water is discharged into which of the waterways, as well as specify the maximum discharge rate into, the base and maximum flow of irrigation water in, the capacity of each of the ditches, and indicate whether these structures can accommodate the increased loading. The applicant must provide the Division copies of all necessary agreements with ditch owners °nor to discharging to • M-2000-016,Lafarge West,Inc.:Riverbend Operation,AM-01 February 11.2005 Adequacy Memo Page 2 these structures. The applicant also needs to explain the effect of discharges to Big Dry Creek. This Item also relates to Item 13 under -Rule 6.4/ Exhibit G — Water Information." 5. The slope stability analyses conducted to determine mining and stream offsets — minimum distances to be maintained between mining excavations and neighboring structures and streams — used a. >4:1 slope angle, whereas the Mining Plan indicates mining may occur up to vertical. The analysis also did not model surcharge loads from topsoil/overburden piles. Offsets need to be recalculated with these inputs included. • 6. The applicant needs to provide the Division with drill hole records so we can check the slope stability modeling. 7. On page 15 of 81, the first paragraph of the Phase Overview states. -The first tailings pond will eventually encompass all of Phase I, Cell 2. Phase I Cell 1 will be utilized as a clean water pond throughout the duration of the project: Exhibit Fl, Reclamation Plan map shows Phase I Cell 1 as 6.3 acres of silt storage and Phase 1 Cell 2 as 39.6 acres of water storage. The applicant needs to clarify, or correct these items so that they are consistent. 8. Much of the site is located in the 100-year flood plain of the South Platte River. Wherever mining will occur within 400 feet of the river channel, cells will need to include inflow and outflow channels, or other appropriate measures. The applicant must submit engineering designs and updated maps to address this situation,where applicable. Rule 6.4.5 EXHIBIT E-Reclamation Plan 9. The Reclamation Plan identifies five cells and one existing pond that will be used for silt storage and reclaimed as wetlands_ Since these silt storage cells have the potential to act as barriers to groundwater flow, the applicant must assess the potential impact and commit to specific mitigation measures. Rule 6A.7 EXHIBIT G-Water Information 10. The applicant needs to provide the basis for the statement on page 24 of 81, paragraph 3, 'No impact to the South Platte River is expected as a result of mining? 11. Rule 6.4.7(1) requires the operator to directly state if surface water or groundwater will be affected by the mining operation. The applicant located wells within 600 feet of the affected land. However, a ground water study may reveal wells outside the 600-foot- radius that may be impacted. If so, these will need to be addressed and exhibits amended, including updating EXHIBIT C per Rule 6.4.7(2)(a). In accordance with Rule 6.4.7(2)(b), the Division requests that the applicant identify and characterize the aquifer to be mined in or through. The Division also requests that the applicant define or predict the cone of depression or shadow and mounding effect expected for any areas to be dewatered and dry mined or as a result of installation of clay liners. The cone of depression and assessment of other effects should define, at a minimum, the horizontal and vertical extent of expected impacts. If, during the assessment, the applicant determines that a drawdown or shadow effect will occur offsite that may impact a current ground water user, the applicant must explain any mitigation measures to be implemented and trigger points that would put mitigation measures into effect M-2000-016,Lafarge Wes-lino.;Riverbend Operation.AM-01 February 11,2005 Adequacy Memo Page 7 12 The applicant needs to describe how the drawdown of the pits and any shadowing/mounding effects will impact the structural integrity of the surrounding wells, surface water drainages, activities which rely on groundwater in the vicinity of the site, and vegetation on or near the site (including the cottonwood trees in the riparian area near the South Platte River and the wetlands located adjacent to the pits). The applicant must also describe any mitigation measures to be implemented and trigger points that would put mitigation measures into effect. • 13. The Division has concerns that there may be effects on the amount of water conveyed in the Fort Lupton Bottom Ditch, the Brighton Ditch, and Big Dry Creek due to dewatering of the pit The applicant must project the amount of water that will be lost from these structures if these structures leak and the ground water level around the structures is lowered as a result of mining activities. The applicant needs to indicate whether this issue has been investigated and the results of that investigation. If this issue has rot been addressed, they must investigate the potential impacts to the water conveyed in these ditches and submit the results to the Division for review. • 14. Due to the potential for permanent impacts to ground water, the applicant may need to take permanent mitigation measures such as installing French drains. The applicant should consider this eventuality and respond to this concern. Groundwater Monitoring Plan: 15. Page 24 of 81 of Exhibit G and Table 1 by AMEC (following p. 27 of 81 — Gravel Well Permit Application) indicate that 13 wells are within 600 feet of the site, with 2 potentially impacted, and the 'Groundwater Monitoring Plan'states 20 wells are within 600 feet with 6 potentially impacted. Please investigate and correct these values, well listings, and associated maps so that the permit application is consistent. 16. Based upon the strong potential for ground water impacts from dewatering 12 large open pits and lining three pits, additional monitoring wells will need to be selected and/or installed to ensure compliance with Rule 3.1.6(1) of the Construction Material Rules and • Regulations, which requires that"disturbances to the prevailing hydrologic balance of the - affected land and to the surrounding area and to the quantity and quality of water in surface and groundwater systems both during and after the mining operation and during reclamation shall be minimized...." The applicant must also provide a list or table showing Well Permit numbers and constructed depths for all the monitoring wells_ 17. Once the monitoring well quantities and positions are deemed adequate by the Division, to establish baseline ground water levels, monitoring frequency for ground water levels in the monitoring wells will need to be increased to monthly. One full year of monthly data will need to be collected and reported prior to beginning mining. The data submitted with the application is inadequate in frequency and extent of monitoring wells. A technical revision will be required to reduce monitoring frequency. 18. Section 12 of the 'Groundwater Monitoring Plan' proposes mitigation measures for alleviating offsite ground water impacts which include delivering water by "pumping and piping or by a drain system,'"delivering replacement water by pumping dewatering water to the affected party(s), pumping from the onsite wells, and delivery from the Brighton • Ditch shares controlled by the operator' It appears that changes of water rights may be necessary for implementation of these mitigation measures- For water sources to be legally available when needed for mitigation, they likely need to be included in the Substitute Water Supply Plan ('SWSP') submitted to the Office of the State Engineer (`OSE"). The applicant must ensure this mitigation water is approved for those uses M-2000-.016,Lafarge West,Inc,:Riverbend Operation,AM-01 February 11,2005 • Adequacy Memo Page 4 • prior to dewatering. Given this information, the applicant must demonstrate that the proposed mitigation plans could work. 19.The Groundwater Elevation Graphs in Appendix B of the "Groundwater Monitoring Plan- separate irrigation season and non-irrigation season groundwater elevations versus date onto separate plots. How were irrigation versus non-irrigation seasons determined? How will it be determined for future data collection? The Division would find the - graphical presentation of these data more useful if the plots were overlaid as two series on one graph or integrated. The Division requests the applicant respond to these • inquiries and also submit revised graphs. Water Balance (P. 28 of 81) 20. "Operational Losses, Table 3" needs to specify what years these depletions occur, or corresponding phases of the operation, including reclamation. Water projected to be consumed by the concrete batch plant, for mitigation purposes, or other uses must be included. The applicant needs to clarify how "Water Balance" is defined and calculated • in this table. 21.The applicant must comply with Rule 6.4.7(4). which states that they "shall indicate the projected amount-from each of the sources of water to supply the project water requirements for the mining operation and reclamation." Water Righfs/SWSPs 22. The SWSP approval letter dated April 2, 2001, submitted with the application for the Fort Lupton Gravel Pit (M-1985-088) portion of the amended permit area, expired on March 31, 2003. The applicant must demonstrate current compliance with OSE requirements for this exposed ground water surface. 23. The applicant must submit a copy of the Well Permit for the currently permitted • Riverbend Operation to demonstrate current complains with OSE requirements. CDPS Permit 24.The applicant should note that the flow rates from the two discharge points in the current CDPS Permit authorization (COG-500416) are limited to 1,000 GPM each (1.44 MGD)- • Stormwater Management Plan ("SWMP') • 25. In Section 4—Table A, there appears to be a discrepancy between the Key and the table as Table A indicates that a storage method for topsoil,overburden, sand and gravel, and recyclable concrete stockpiles is " 'I,' enclosed areas" and a management practice for diesel fuel tanks, lubricating fluids, and concrete additives is "L; stockpile revegetation" The applicant needs to address these discrepancies. The Division assumes that the diesel fuel tanks, etc. will be placed on impervious surfaces and requests that the applicant describe the makeup of the impervious surface.' 26. Section 7: Preventive Maintenance, the applicant should specify an inspection frequency for all facilities listed, rather than "as-needed." 27. The statements describing the implementation and applicability of the practices in Section 9: Best Management Practices are listed as options. Please indicate which one(s) will actually be used on site and where so the Division can calculate the applicable bond amount for removal and/or reclamaticn of such structures. • AHRGE NORTH AMERICA AGGREGATES, CONCRETE r & ASPHALT March 11, 2005 • Mr.Gregg R Squire Division of Minerals and Geology 1313 Sherman St,Room 215 Denver,CO 80203 RE: Lafarge West,Inc.,Permit No.M-2000-016 Rivet-bend Operation; Adequacy Review Response to Requested Amendment Dear Mr. Squire, Listed below are Lafarge's responses to the Division's adequacy review comments on the Riverbend Operation 112c Permit Amendment 01 Application, Permit Number M-2000-016. 1. Exhibit C—Pre-Mining and Mining Plan Maps a) Since this application is an amendment to an existing permit,M-2000-016, the Riverbend Operation, and will incorporate a second active pit, M-1985-088, the Fort Lupton Pit, into the amended area, the Division is requesting that the applicant provide a map showing the boundaries of the two currently permitted sites and their correlation with the areas to be incorporated into the Riverbend permit through the amendment process. The existing boundaries for permit M-1985-088 and M-2000-016 have been added to Exhibit Cl Pre-Mine Map. The existing permit areas have been shaded in gray,please see attached Exhibit CI Pre-Mine Map. b) The legend on Exhibit C3 Mine Plan Map indicates that the purple dashed line with two dots between each dash represents lateral ditches. In the northeast corner of Phase 3 on this map there are purple dashed lines with only one dot between each dash. What does this symbol represent? The feature in the northeast corner of Phase 3 incorrectly identified with only one dot between each dash is a lateral ditch. Exhibit C3 has been corrected; the lateral ditch is represented by the appropriate line type. c) An examination of the Mine Plan Maps show several locations, especially within Phases 4 and 6, where the topsoil/overburden stockpiles are located within 20 or 30 feet of the South Platte River channel and along the outside edge of a river bend. How will these stockpiles be protected from undercutting at the toe of the stockpiles during high flows, and how will the river be protected in the even that the stockpiles may erode or slump in to the channel?. LAFARGE NORTH AMERICA INC- -Aggregates,Concrete 8 Asphalt 10170 Church Ranch Way Suite 200,Westminster,Colorado 80021 Telephone: (303)657-4000 Facsimile.-(303)657-4037 fAFAUGE AMERICA AGGREGATES, CONCRETE &ASPHALT No stockpiles will be placed near the South Platte River, at the request of the DOW an undisturbed 200-feet offset from the South Platte River will be maintained. Exhibits C2, - C3,and C4 have been revised, see enclosed maps. 2. Exhibit D—Mining Plan a) On page 12 of the Application, in the "Mining Plan section"it is stated that there are concrete and asphalt plants on the site; it is assumed that a fueling/lubrication station will also be located at the site. What protection measures will be used to ensure spills of asphalt and/or concrete materials will not contaminate the surface or ground water? Will concrete trucks be washed-out at the site? If so, what measures will be utilized to contain the wash water? In the event of a spill what measures will be taken to capture the spilled fuels/lubricants? The Division recommends that the storage area(s) be located outside the floodplain. If it is necessary to have storage areas within the floodplain, the applicant must also describe protection measures that will be employed to contain the materials in the event of a flood. If storage of petroleum products exceeds the thresholds designated in federal regulations, a Spill Prevention Control and Countermeasures (SPCC)Plan will be developed in accordance with the regulations. Any protective berms required in this plan will be designed as required by federal regulations- At Lafarge concrete plants, concrete wash water is generally contained in a concrete lined settling basin that allows for recycling of the wash water. If storage areas are located in the floodplain, additional protective measures for storage tanks will be utilized as required in the Flood Hazard Development Permit issued by the county. b) If any of the concrete batch plant, asphalt batch plant or fueling lubrication station structures are permanent installations, e.g. on concrete foundations, their location, size, type of construction must be provided in the application so the Division can include a demolition cost in the financial warranty calculation. Please provide this information. The location of all structures are identified on Exhibit C enclosed. The typical dimensions of a concrete plant are 60 ft by 30 fi or approximately 1800 sq. ft. The typical dimensions of an asphalt plant are 20 ft by 40 ft or approximately 800 sq. ft. In past permit applications Lafarge has used and the division has accepted $50,000 per structure as a proposed reclamation cost. 3. Exhibit G—Water Information and Additional Hydrologic and Geotechnical Information A copy of a separate review of these issues is enclosed Please see the attached memo from Kathleen Sullivan PR, of the Division. LAFARGE NORTH AMERICA INC. -Aggregates,Concrete A.Asphalt 10170 Church Ranch Way Suite 200,Westminster,Colorado 80021 Telephone:(303)657-4000 Facsimile:(303)657-4037 FARCE NORTH AMERICA AGGREGATES, CONCRETE & ASPHALT A copy of a separate response to these issues is enclosed;please see the attached memo. 4. Exhibit H—Wildlife Information and Exhibit C Mine Plan Maps a) A review of the mine plan maps shows a 200 foot setback from the mining limits to the South Platte River, but also shows disturbance boundaries which are much closer to the river, in some areas possibly as close as 20 to 30 feet, including the location of topsoil/overburden stockpiles. In the comment letter from the Colorado Division of Wildlife (DOW), dated January 21, 2005, it is stated, "In order to protect the riparian area and the diversity of large and small mammals, birds, and herptiles that inhabit the site, a 200'setback from the western shoreline of the river is recommended. It is also recommended to keep as many of the mature cottonwoods as possible, and leave snags where feasible."Please submit a plan to leave a 200 foot undisturbed riparian corridor between the disturbed area and the riverbank and describe how this area will be protected from any accidental disturbance. Also describe what number(or areas) of mature cottonwoods will be protected and how they will be protected. It has been shown that groundwater dewatering can kill cottonwoods. Will the operator take measures to prevent the killing of cottonwoods through groundwater dewatering? If so,please describe these measures. The maps have been revised to reflect a 200-feet undisturbed riparian corridor between the disturbed area and the riverbank. Lafarge will use T-posts to stake the 200-feet offset to clearly define the limits of disturbance and to ensure protection of the riparian corridor. Lafarge will not directly disturb cottonwoods within the 200-feet corridor and will use water from dewatering operations and perforated pipe to water the cottonwoods while the pit is dewatered. b) A copy of the January 21, 2005 DOW comment letter is enclosed Please respond to their concerns regarding: i. Bald Eagle winter night roosts Lafarge is coordinating efforts with DOW representatives and wildlife consultants to identify the exact location of potential eagle roosts. Lafarge has met with both DOW and USFWS at the site; mitigation measures are being developed. ii. Perch buffers and leaving a portion of Prairie Dog Colony A intact for a food supply for raptors Lafarge, DOW, USFWS met on site Friday, February 25, at which time the agencies consented to the removal of prairies dogs within the permit boundary, provided the removal occurs prior to April 1. t AFARGE NORTH AMERICA INC. -Aggregates.Concrete 8 Asphalt 10170 Church Ranch Way Suite 200,Westminster,Colorado 80021 Telephone.(303)657-4000 Facsimile:(303)657-4037 fitIFAIFiGE NORTH AMERICA AGGREGATES, CONCRETE & ASPHALT iii. The need for a Black footed Ferret survey and a March 1- October 31 survey for Burrowing Owls. Bob Leechman, USFWS,stated a survey for black-footed ferrets is not required in this area. A survey for Burrowing Owls is required only if the prairie dog colonies will be disturbed between April I —October 31. iv. The question of the need for a survey for the presence of Mountain Plovers. Bob Leachman,USFWS,stated a survey for mountain plover is not required in this area. 5. Proof ofNotice "Proof of notice and mailings, such as Certified Mail-Return Receipt Requested, must be submitted to the Division of Minerals and Geology prior to the decision date. " In this case, since the application has received objections, the Division will not make a decision but will make a recommendation to the MLRB, the proof ofpublication and other notices must be submitted prior to the recommendation, which is scheduled for February 25, 2005. Please find enclosed an affidavit from the Fort Lupton Press verifying proof of publication in the local newspaper. Certified mail receipts serve as proof of notice to land and structure owners located within 200 feet of the proposed permit boundaries. 6. Additional comments a) The Division wishes to point out to the applicant that since this is an amendment to an existing permit, all commitments, requirements and stipulations that were incorporated into the original permit are also applicable to the amended areas. The applicant understands that since this is an amendment to an existing permit, all commitments,requirements and stipulations that were incorporated into the original permit are also applicable to the amended areas. b) On the Mine Plan Maps there is a note (Notes-#1) that "The mine cell location and limits are conceptual, their size and shape may vary due to geologic and/or site conditions.- Please change all maps to remove references to "conceptual"plans, the Division cannot accept or approve "conceptual"plans, the Division cannot accept or approve "conceptual"submittals. The Division also requests that the statement "These phases are neither representative of the maximum area of disturbance nor do they limit disturbance to a single phase. "be removed from the application documents since such a statement makes the phasing and associated bonding difficult or impossible to regulate. Changes to the approved permit or LAFARGE NORTH AMERICA INC. -Aggregates.Concrete&Asphalt 10170 Church Ranch Way Suite 200,Westminster.Colorado 80021 Telephone:(303)657-4000 Facsimile:(303)657-4037 JAFARGE NORTH AMERICA • AGGREGATES, CONCRETE &ASPHALT amendment must be done by submitting a revision or amendment to the Division and obtaining the Division's approval_ Note#1 has been modified to state"The mine cell location and limits are approximate, their size and shape may vary due to geologic and/or site conditions." Lafarge understands it may not disturb areas located outside of the limit of affected area nor may it mine outside of designated mine cells- The comment, "These phases are neither representative of the maximum area of disturbance nor do they limit disturbance to a single phase"has been removed from the permit text_ c) The Division has provided the applicant with two objection letters. Please respond to Peterson Energy Management Inc. 's concern regarding setbacks, and the Morton and Stevens'letter concerning legal right of entry. Lafarge met with Peterson Energy Management, Inc. (PEM)on site to review the mine plan and offsets. PEM has been provided a Party Status Withdrawal Form,which they indicated would be signed and submitted to the Division. Lafarge maintains a firm stance regarding its legal right to access the Morton property for mining purposes. However, Morton and Stevens continue to have concerns and an agreement has not been reached at this time. The Morton property has been removed from the permit boundary; the text and maps have been modified accordingly. The concerns of Morton and the Stevens have been eliminated; their objection has been rendered invalid. Lafarge has carefully reviewed the adequacy comments you provided and believes the detailed responses in this letter satisfy the Division's concerns. If you have any questions or need additional information, please do not hesitate to call. Best regards, SuzanneJanzen Land Specialist • (303) 657-4421 Enclosure(s): Mine Plan Exhibits Cl, C2, C3 Memo, Re: Exhibit G Water Information Proof of Notice and Publication (Certified Mail Receipts, Affidavit) LAFARGE NORTH AMERICA INC. -Aggregates,Concrete 8 Asphalt 10170 Church Ranch Way Suite 200,Westminster,Colorado 80021 Telephone:(303)657-4000 Facsimile:(303)657-4037 FARCE NORTH AMERICA AGGREGATES, CONCRETE & ASPHALT ec_ File 420-420 LAFARGE NORTH AMERICA INC. -Aggregates,Concrete&Asphalt 10170 Church Ranch Way Suite 200,Weslminster,Colorado 80021 Telephone-(303)657-4000 Facsimile:(303)657-4037 LAFARG E NORTH AMERICA Construction Materials MEMO To: Gregg Squire From: Suzanne Janzen Subject: M-2000-016,Lafarge West, Inc. Riverbend Operation,AM-01 Date: March 11, 2006 cc: Kathleen Sullivan 1. The Applicant should be aware of and acknowledge that Stipulation No I. to the original pennit M-2000-016, regarding the 400-ft setback from the S. Platte River, will remain in effect for and apply to the amended area.. Lafarge acknowledges Stipulation No.1 to the original pt unit M-2000-016, the 400-feet setback from the top of the bank of the South Platte River will remain in effect for and apply to the amended area. As stated in the stipulation, Lafarge will provide an adequate evaluation "of the stability of riverside berms to be lefi at the conclusion of mining,"which could allow mining closer than 400 feet. Exhibit C has been revised to include the 400-feet offset from the top of the bank of the South Platte River and a commitment to Stipulation No. 1. The mine cells have not been amended; however, Lafarge commits to Stipulation No. 1 and will not mine closer than 400-feet to the South Platte River without a riverbank stabilization evaluation. 2. All maps must be amended to show all water features and other relevant features, especially the continuity of creeks, rivers, and ditches that may be affected by this operations, even if they are more than 600 feet from the proposed permit boundary. Exhibits Cl, C2, C3, C4, Fl, F2, and F3 have been amended to show the South Platte as it runs through the Olgilvie and Von Struve properties of Section 18 and the Fort Lupton Bottom Ditch and Big Dry Creek through the lower half of Section 13. 3. The applicant must ensure compliance with all other agency requirements for the expanded operation, such as updated Substitute Water Supply approvals and current Well Permits, CDPS permits, etc.prior to engaging in related operations at the site. Lafarge will ensure all other agency permits are in place prior to commencement of mining activities. Lafarge will operate under existing approved permits in the original permit area and will apply for and obtain an amended Substitute Water Supply Plan, Well Permit, CDPS permit, and any other required permits prior to mining cells not previously covered. LAFARGE NORTH AMERICA INC- -Lafarge Aggregates,Concrete 8 Asphalt 10170 Church Ranch Way.Suite 200 Westminster,Colorado 80021 Telephone:(303)657-4000 Facsimile:(303)657-4037 LAFARGE NORTH AMERICA Construction Materials - - 4. The submitted mining plan indicates that water resulting from dewatering and storm water runoff will be discharges into the South Platte River, Big Dry Creek, or into the Lupton Bottom Ditch or the Brighton Ditch, or into adjoining cells. The applicant must indicate what factor(s) will determine whether water is discharge into which of the waterways, as well as specify the maximum discharge rate into, the base and maximum flow of irrigation water in, the capacity of each of the ditches, and indicate whether these structures can accommodate the increased loading. Lafarge will not discharge into irrigation ditches prior to executing an agreement with the Ditch Company. Lafarge has spoken with the Lupton Bottom Ditch Company and has agreed to have agreements in place one year prior to dewatering activities in cells adjacent to the ditch. The maximum discharge rate, the base and maximum flow of irrigation water in, the capacity of each ditch, and an engineering analysis to determine the effects of loading will be calculated during agreement negotiations. The Ditch Company will determine what is acceptable in the agreement. The Lupton Bottom Ditch runs through Big Dry Creek along portions,therefore impacts to Big Dry Creek will be assessed during Lupton Bottom agreement negotiations. In general, the dewatering water placed in the ditches and/or waterways is only the water removed from that source. Lafarge will not discharge more water than a ditch, stream,or river can accommodate; all dewatering discharges will be assessed,monitored, and modified as necessary during operations. The Colorado Department of Health and Environment, Water Quality Control Division,will also provide a measure of control over discharge through our CDPS permit. 5. The slope stability analyses conducted to determine mining and stream offsets used a '/z:1 slope angle, whereas the Mining Plan indicates mining may occur up to vertical. The analyses also did not model surcharge loads from topsoil/overburden piles. Offsets needs to be recalculated with these inputs included. The Mining Plan has been amended to reflect mining to a %:I slope angle, Lafarge will maintain the /:l mining slope and will not mine to vertical. All overburden and topsoil piles will be outside the offset limits and will not affect the limits; Exhibit C has been modified so all stockpiles are located outside the specified offsets. 6. The applicant needs to provide the Division with drill hole records so we can check the slope stability modeling. Please find enclosed the spreadsheet titled "Borehole Data" which provides the logged depths of all drill holes within the Riverbend amendment area. The map titled "Borehole Locations" shows the corresponding location of each drill hole. LAFARGE NORTH AMERICA INC- -Lafarge Aggregates,Concrete 8 Asphalt 10170 Church Ranch Way, Suite 200 Westminster,Colorado 80021 Telephone_(303)657-4000 Facsimile:(303)657-4037 IAFARG E NORTH AMERICA ,�. Construction Materials - 7. On page 15, the permit text was inconsistent with Exhibit FI. The applicant needs to clarify, or correct these items so that they are consistent. Lafarge has corrected the discrepancy, Exhibit Fl shows the correct phasing and configuration and the permit text has been amended to reflect Exhibit F. Phase I Cell 1 will be the first silt storage pond, totaling 6.3 acres. Phase] Cell 2 will be 39.6 acres of water storage. 8. Much of the site is located in the 100 year flood plain of the South Platte River. Wherever mining will occur within 400 feet of the river channel, cells will need to include inflow and outflow channels, or other appropriate measures. The applicant must submit engineering designs and updated maps to address this situation, where applicable. Lafarge will not mine within 400 feet of the river channel without a bank stabilization analysis, as necessitated by Stipulation No I. Whether the cells will require inflow and outflow channels will be addressed in that analysis. 9. The Reclamation Plan identifies five cells and existing pond that will be used for silt storage and reclaimed as wetlands. Since these silt storage cells have the potential to act as barriers to ground flow, the applicant must assess the potential impact and commit to specific mitigation measures. Please see attached response prepared by Donald Frick of Applegate Group, Inc. 10. The applicant needs to provide the basis for the statement on page 24 of 81,paragraph 3, "No impact to the South Platte River is expected as a result of mining-" No net impact to the South Platte River is expected as a result of mining. Please see attached "Groundwater and Surface Water Evaluation Before During and After Riverbend Mining Operations"prepared by AMEC, which shows temporary impacts and mitigations to the South Platte River as calculated with MODFLOW. 11. Rule 6.4.7(1) requires the operator to directly state if surface water or groundwater will be affected by the mining operation. In accordance with Rule 6.4.7(2)b, the Division requests that the applicant identify and characterize the aquifer to be mined in or through_ The Division also requests that the applicant define or predict the cone of depression or shadow and mounding effect expected for nay areas to be dewatered and dry mined or as a result of installation of clay liners. The cone of depression and assessment of other effects should define, at a minimum, the horizontal and vertical extent of expected impacts. Please see enclosed "Groundwater and Surface Water Evaluation Before, During, and After Fort Lupton / Riverbend Mining Operations" which defines the horizontal and vertical extent of LAFARGE NORTH AMERICA INC. r Lafarge Aggregates.Concrete& Asphalt 10170 Church Ranch Way.Suite 200 Westminster.Colorado 80021 Telephone:(303)657-4000 Facsimile:(303)657-4037 LAFARGE NORTH AMERICA • Construction Materials expected groundwater impacts. The Groundwater and Surface Water Evaluation Before During and After Riverbend Mining Operations has identified two wells that may potentially be impacted by our mining operations, well number 2216 owned by John Norris and well number 13697 owned by Tom Holton. A waiver will be obtained by these well owners prior to mining within 600-feet of their wells; the well owners will negotiate preferred mitigation measures. The concerns and rights of well owners in the area will be addressed in more detail by the Office of • the State Engineer through the gravel well permit application process. 12. The applicant needs to describe how the drawdown of the pits and any shadowing/mounding effects will impact the structural integrity of the surrounding wells, surface water drainages, activities which rely on groundwater in the vicinity of the site, and vegetation on or near the site (including the cottonwood trees in the riparian area near the South Platte River and the wetlands located adjacent to the pits). The applicant must also describe any mitigation measures to be implemented and trigger points that would put mitigation measures into effect. Please see enclosed "Groundwater and Surface Water Evaluation Before During and After Riverbend Mining Operations" which describes the anticipated impacts from the drawdown of the pits. The cottonwood trees in the riparian area near the South Platte River will be preserved; dewatering water will be discharged through pipes that are perforated in the portions adjacent to cottonwood groves located within 200 feet of the river corridor. Impacts to the wetlands, both jurisdictional and non-jurisdictional, will be addressed in the Corps 404 Individual Permit currently under draft. 13- The Division has concerns that there may be effects on the amount of water conveyed in the Fort Lupton Bottom Ditch, the Brighton Ditch, and Big Dry Creek due to dewatering of the pit. The applicant must project the amount of water that will be lost from these structures if these structures leak and ground water level around the structures is lowered as a result of mining activities. The applicant needs to indicate whether this issue has been investigated and the results of that investigation. Please see enclosed "Groundwater and Surface Water Evaluation Before During and After Riverbend Mining Operations"which details anticipated impacts resulting from dewatering activities. Please refer to Response#4, which explains how dewatering activities will not occur adjacent to the ditches prior to agreement execution. 14. Due to the potential for permanent impacts to ground water, the applicant may need to take permanent mitigation measure such as installing French drains. The applicant should consider this eventually and respond to this concern. Please refer to attached response prepared by Applegate Group, Inc. LAFARGE NORTH AMERICA INC_ -Lafarge Aggregates,Concrete 8 Asphalt 10170 Church Ranch Way.Suite 200 Westminster,Colorado 80021 Telephone:(303)657-4000 Facsimile:(303)657-4037 LAFARGE NORTH AMERICA Construction Materials 15. Page 24 of 81 of Exhibit G and Table 1 by AMEC indicate that 13 wells are within 600 feet of the site, with 2 potentially impacted, and the "Groundwater Monitoring Plan" states 20 wells are within 600 feet with 6 potentially impacted. The inconsistencies among the"Groundwater Monitoring Plan,"Exhibit G,and Table 1 have been corrected to show the same number of potentially impacted wells. The"Groundwater Monitoring Plan"was drafted prior to the engineered groundwater model. 16. Based upon the strong potential for ground water impacts from dewatering 12 large open pits and lining three pits, additional monitoring wells will need to be selected and/or installed to ensure compliance with Rule 3.1.6(1). The applicant must also provide a list or table showing Well Permit numbers and constructed depths for all the monitoring wells_ Lafarge has installed 30 monitoring wells within the amendment boundary which are monitored under a clearly defined ground water monitoring plan. The groundwater model has illustrated areas with potential for impact; Lafarge currently has monitor wells in each of these locations. Monitor wells DS03-MW05 and DS03-MWO6 are located in the immediate vicinity of well number 2216, which has been identified as low risk for impact during mining activities. Monitor wells DS03-MWO5 and DS03-MWO6 are also located in the immediate vicinity of well number 13697, which has been identified as high risk for impact during mining activities. These monitor wells are adequate for monitoring the areas of concern identified in the groundwater model. Upon commencement of mining at the site, the monitor well measurements will be assessed to validate the groundwater model_ If inconsistencies exist or nearby landowners experience impacts, the quantity and location of specific, additional monitor wells will be accurately identified. The installation of additional monitor wells, if necessary, will be most beneficial once mining has begun and locations can be appropriately selected based on need. 17. Once the monitoring well quantities and positions are deemed adequate by the Divison, to establish baseline ground water levels, monitoring frequency for ground water levels in the monitoring wells will need to be increased to monthly. One full year of monthly data will need to be collected and reported prior to beginning mining. The data submitted with the application is inadequate in frequency and extent of monitoring wells. A technical revision will be required to reduce the frequency. As stated in question 16,Lafarge has installed 30 monitoring wells within the amendment boundary, which are monitored under a clearly defined ground water monitoring plan. Lafarge understands the Division's concerns pertaining dewatering during the mining operations and potential impacts to neighbors. Lafarge has utilized over 5 years of groundwater level data and developed a groundwater model that has calculated areas with potential for impact. As stated in response to question 16, Lafarge currently has monitor wells in each of these locations. The results of the study have shown that monitor wells DS03-MW05 and DS03-MW06 are located in LAFARGE NORTH AMERICA INC. -Lafarge Aggregates,Concrete 8 Asphalt 10170 Church Ranch Way,Suite 200 Westminster,Colorado 80021 Telephone_(303)65T4000 Facsimile:(303)657-4037 LAFARGE NORTH AMERICA Construction Materials the immediate vicinity of well number 2216, which has been identified as low risk for impact during mining activities. Monitor wells DS03-MW05 and DS03-MW06 are also located in the immediate vicinity of well number 13697, which has been identified as high risk for impact during mining activities. Once again, because this is a long-term project, approximately 25 years, Lafarge is maintaining the position that wells located outside a current cone of depression from an existing dewatering operation should not be required to be monitored more than quarterly. In addition, Lafarge believes that the impact to the neighbors wells will be minimal, however, will accept the responsibility of conducting monthly monitoring well readings in the vicinity of the active pit area that is conducting dewatering efforts that may impact an nearby well. Lafarge has collected over 5 years of water level data for the project and believes that one year of monthly readings across the entire site prior to the start of mining on our first 40-acre parcel will not provide benefit to the project. Lafarge believes that baseline water levels have been established utilizing our multitude of water level readings and requests consideration to the condition stated above. 18. Section 3.2 of the "Groundwater Monitoring Plan"proposes mitigation measures for alleviating offsite ground water impacts, which include delivering water to affected party(s). It appears that changes of water rights may be necessary for implementation of these mitigation measures_ For water sources to be legally available when needed for mitigation, they likely need to be included in the Substitute Water Supply Plan submitted to the Office of the State Engineer. The applicant must ensure this mitigation water is approved for those uses prior to dewatering. Given this information, the applicant must demonstrate that the proposed mitigation plans could work. The mitigation proposed in the"Groundwater Monitoring Plan"was recommended by the Division during a previous permit application and has been successfully implemented in the past. The OSE maintains jurisdiction over approved water uses and water will not be used for mitigation purposes prior to OSE approval. If mitigation is required, the method of mitigation will be agreed upon with the well owner and a temporary change of use, if necessary, will be incorporated into our Substitute Water Supply Plan. 19. The Groundwater Elevation Graphs in Appendix B of the "Groundwater Monitoring Plan"separate irrigation season and non-irrigation season groundwater elevations versus date onto separate plots. How were irrigation versus non-irrigation seasons determined? How will it be determined for future data collection? The Division would find the graphical presentation of these data more useful if the plots were overlaid as two series on one graph or integrated. The Division requests the applicant respond to these inquiries and also submit revised graphs. LAFARGE NORTH AMERICA INC_ -Lafarge Aggregates, Concrete 8 Asphalt 10170 Church Ranch Way,Suite 200 Westminster,Colorado 80021 Telephone-(303)657-4000 Facsimile'(303)657-4037 LAFARGE NORTH AMERICA Construction Materials • The Groundwater Elevation Graphs in Appendix B were separated between irrigation and non- irrigation season because the Division had requested the separation on Lafarge's most recent permit application. Irrigation versus non-irrigation seasons were determined by the months during which the ditches deliver water. The data is collected in the same manner in each season, however the data were split to illustrate consistent seasonal data. A revised set of graphs illustrating integrated,non-seasonal data is attached. 20. "Operational Losses, Table 3"needs to specify what years these depletions occur, or corresponding phases of the operation, including reclamation. Water projected to be consumed by the concrete batch plant,for mitigation purposes, or other uses must be included. "Operational Losses, Table 3"intentionally reflected the depletions in mining years rather than calendar years to allow for flexibility in the mining start data The table has been modified to reflect the corresponding phases. Water used by the concrete batch plant, for mitigation purposes, and other uses will be reviewed by the OSE during the SWSP renewal. 21. The applicant must comply with Rule 6.4.7(4), which states that they "shall indicate the projected amount from each of the sources of water to supply the project water requirement for the mining operation and reclamation. " Please see attached response from Applegate Group, Inc_ 22. The SWSP approval letter dated April 2, 2001, submitted with the application for the Fort Lupton Gravel Pit (M-1985-088)portion of the amended permit area, expired on March 31, 2003. The applicant must demonstrate current compliance with OSE requirements for this exposed ground water surface. Please see attached response from Applegate Group, Inc. 23. The applicant must submit a copy of the Well Permit for the currently permitted Riverbend Operation to demonstrate current compliance with OSE requirements. Please see attached response from Applegate Group, Inc. 24. The applicant should note that the flow rates from the two discharge points in the current CDPS Permit authorization (COG-500416) are limited to 1,000 GPM each (1.44 MGD). LAFARGE NORTH AMERICA INC_ -Lafarge Aggregates,Concrete&Asphalt 10170 Church Ranch Way,Suite 200 Westminster,Colorado 80021 Telephone: (303)657-4000 Facsimile_ (303)657-4037 LAFARGE • NORTH AMERICA Construction Materials Lafarge acknowledges the CDPS maximum daily discharge rate of 1.44 MGD. Lafarge will amend the existing CDPS permit prior to adding new discharge points in the amendment area or discharging at a rate greater than 1,000 GPM. 25. In Section 4— Table A, there appears to be a discrepancy between the Key and the table. The Division assumes that the diesel fuel tanks, etc. will be placed on impervious surfaces and requests that the applicant describe the makeup of the "impervious surface." An updated version of the Stormwater Management Plan has been included, which includes significant changes to the format and information included. The updated version is intended to serve as a guideline and provide Best Management Practices (BMPs). The SWMP for the site cannot be truly accurate until mining commences; at this point no stormwater controls are • necessary. 26- Section 7:Preventative Maintenance, the applicant should specify an inspection frequency for all facilities listed. Section 7: Preventative Maintenance has been updated to specify an inspection frequency for each facility listed. 27. The statements describing the implementation and applicability of the practices in Section 9: Best Management Practices are listed as options. Please indicate which one(s) will actually be used on site and where so the Division can calculate the applicable bond amount for removal and/or reclamation of such structures. Specific BMPs have been selected to allow the Division the ability to calculate the bond amount; the maximum number of controls has been selected to eliminate the need for future bond re- calculations. Once mining begins and the need for storm water controls arises, the SWMP will be revised. The number of controls implemented will not exceed what is presently indicated in the SWMP. End Memo— SKl Enclosures: Groundwater and Surface Water Evaluation Before During and After Riverbend Mining Operations Borehole Data Borehole Location Map SWMP Exhibit F Groundwater Monitoring Plan LAFARGE NORTH AMERICA INC. -Lafarge Aggregates,Concrete&Asphalt 10170 Church Ranch Way.Suite 200 Westminster.Colorado 80021 Telephone:(303)657-4000 Facsimile:(303)657-4037 ILLAFAR G E NORTH AMERICA Construction Materials LAFARGE NORTH AMERICA INC. —Lafarge Aggregates,Concrete 8 Asphalt 10170 Church Ranch Way,Suite 200 Westminster,Colorado 80021 Telephone: (303)657-4000 Facsimile:(303)657-4037 Applegate } Group, ,... - - - - March 11,2005 . Ms: Suzanne Janzen Lafarge West,Inc: 10170 Church Ranch Way,Suite 200 Westminster,CO 80021 • RE: Lafarge West,Inc.,Riverbend Operation Response to Adequacy Review 112c Permit Amendment 01,Permit No.M-2000-016 Dear Suzanne: The purpose of this letter is to provide you with responses to The Division of Minerals and Geology's ("DMG") adequacy review of the 112e Permit Amendment to Lafarge West, Inc. ("Lafarge's") Riverbend Operation (Permit No. M-2000-016). Specifically, this letter will address unresolved issues from DMG's comments regarding Exhibits D,E and G in its adequacy review letter dated February 11, 2005_ For clarity we will list each of DMG's comments followed by the respective responses. 9. The Reclamation Plan identifies five cells and one existing pond that will be used for silt storage and reclaimed as wetlands Since these silt storage cells have the potential to act as barriers to groundwater flow the applicant must assess the potential impact and commit to specific mitigation measures: The silt ponds identified in the reclamation plan will impact the flow.of groundwater surrounding each pond by effectively lowering the hydraulic conductivity in the area. Similar to the effects on the groundwater flow in the vicinity of a lined pond, some increase in groundwater elevation, or mounding may occur on the up-gradient side of each silt pond; decreases in the elevation of the groundwater table, or shadowing, may occur on the down-gradient side of each silt pond. Based on our review of the location wells and other potentially effected structures in the vicinity of the silt ponds, as well as our review of the groundwater modeling previously completed for the site, the effects on the groundwater flow from these silt ponds is negligible. There are five silt ponds identified in the reclamation plan. Each of these ponds will be reclaimed as wetlands, and we will discuss the potential impacts from each in turn. First, Cell 2 in Phase -I will be located on the east side of the South Platte River in the southeast corner of the site. There are two wells located to the north and southeast from this pond that could potentially be impacted by this pond. Lafarge controls the well located to the north of the pond, permit no. 13699; as such we will not consider the effects to this well. As for the potential effects to the well located to the southeast of the pond (permit no.'163521), the lining of Cell. I, which lies between Cell 2 and the well,will have a greater impact on the water levels in the well. The groundwater model determined the ultimate effect of the reclamation of the site on the well a 1499 Wesl 1201h Avenue.Suite 200 (303)452-6611 •Fax(303)4522759 Denver.Colorado 80234-2759 www.applegalegroupcom • Ms Suwnnelanze» March f1,20.05 - • -Page 2of4 i to be an increase in water level in the well of less than V2 foot (see Table-5). This is consistent with our experience with similar sites in the area. The combined effect of the lining of Cell 1. and the reclamation of Cell 2 as wetlands will not increase the extent of the mounding effeets on - the well. Further,there is a small natural drainage between Cell 1 and the well. If groundwater elevations increase,this drainage will provide a natural means of alleviating any such increase. Alternatively, the drainage could be deepened slightly which would allow for control of the up- gradient mounding. Cells l and 2 in Phase 2, and:Cell I in Phase 3 of the mining operation will all be used as,silt ponds and reclaimed as wetlands. There are only two wells in the vicinity of these cells,permit MS. 128682 and 12259, and both are owned by Lafarge. We also note that there are an additional three wells, permit nos. 1147, 1145 and 232943, located in the immediate vicinity of Phase 4 that may be impacted. However,these wells are also controlled by Lafarge. Finally, Cell 2 in Phase 5 will be used as a silt pond and reclaimed as wetlands. There is an existing well (permit no: 4180) located immediately to the north of the cell, which is controlled by Lafarge. To the extent that reclamation of the silt ponds changes the groundwater flow in the area, the only potential adverse effects to structures not owned by Lafarge,exist with respect to the well to the southeast of the site_(permit no. 163521). Based on the groundwater model and our experience with similar sites in the area, these effects will be limited to an increase in water levels in the well less than 1 foot above existing water levels: Lafarge will commit to monitoring • the groundwater levels surrounding the site, and in particular the area immediately to the southeast of the site for two years following reclamation of Phase I to determine if there are any adverse impacts to well permit 163521. If monitoring of the groundwater elevation shows an increase in the water table coupled with a physical injury to the well, Lafarge will commit to the above described mitigation with respect to the drainage between Phase 1 and the well. 14. . Due to the potential for permanent impacts to ground water, the applicant may need to take permanent mitigation measures such as installing French drains- The applicant should consider this eventuality and respond to the concern. Lafarge recognizes that the reclamation of the site will cause modifications to the natural flow of groundwater in the area. These changes are most significant from the lining of certain areas of the site and from silt ponds reclaimed as wetlands. In general, the effects of reclamation of the site will be increases in the water table elevation up-gradient, and decreases in the, water table elevation down-gradient of these areas. As described above, the effects of the modification of the groundwater flow in the area from the silt ponds on existing structures will be minimal, and what effects there are Lafarge will commit to the necessary mitigation measures. With respect to the areas that will be lined after reclamation is completed, these areas include only Phases I and 4. The groundwater modeling shows that the change in water table elevations Ms.Suzanne Janzen March 11,2005 Page 3of4 • after reclamation will be less than+1- 1 foot as compared to existing conditions. Again, Lafarge will commit to monitoring groundwater elevations in the vicinity of the site for a period of two years following completion of reclamation_ If the monitoring shows a change in water levels from historic levels (based on ongoing monitoring by Lafarge prior to mining) greater than 2 feet, coupled with physical injury to a structure Lafarge will install a French drain or other appropriate structure to collect up-gradient groundwater and discharge it on the down-gradient, side of each slurry wall or clay liner. Our previous experience suggests that this is an effective means of alleviating mounding and shadowing effects surrounding lined gravelpits. We note that Colorado water law generally does not recognize the right of:a well owner to a guaranteed water level in his well If a well that is impacted by shadowing or mounding effects is neither drilled to the full extent of the alluvium nor has its pump intake set at the lowest possible elevation,the owner of the well likely cannot make a valid claim of injury to his water right(see Colorado Springs v. Bender, 366 P:2d 552 at 555 (Colo. 1961)). Further, the potential injury to vested water rights will be the subject of State Engineer's review of the well permit application submitted pursuant to C.R.S. §37-90-137(2) for the operation of the site. Still, Lafarge recognizes that its operation may modify the flow of groundwater in the area, and to the extent that modifications adverse to existing structures occur as a direct result of its mining operation and subsequent reclamation of the site Lafarge will commit to above described monitoring and mitigation. 21. The applicant must comply with Rule 6.4.7(4), which states that they "shall indicate the projected amount from each of the sources of water to supply the project water requirements for the mining operation and reclamation" During mining, Lafarge will utilize leases from the City of Greeley and the Consolidated Mutual Water Company for replacement of mining depletions. Lafarge owns 25 Fulton Ditch shares, which provide 43.9 acre-feet of historic consumptive use credit. These shares are presently committed to the combined substitute supply plan for Lafarge's seven South Platte River sites, which includes the Riverbend Operation and the Fort Lupton Pita Lafarge also owns 1:75 Brighton Ditch shares. Lafarge will complete a historic consumptive use evaluation for these shares in order to include them as a replacement source in future renewals of the combined substitute supply plan for the South Plane sites. The farm headgate delivery for 1.75 Brighton Ditch shares is approximately 821 acre-feet. The leases and water rights in the combined substitute supply plan will replace all out-of-priority depletions for all seven sites including post- pumping depletions until all the sites are either lined or include in an approved plan of augmentation is obtained from water court. 22 The SWSP approval letter dated April 2, 2001, submitted with the application for the Fort Lupton Gravel Pit (M-1985-088)portion of the amended permit area, expired on March 31, 2003- The applicant must demonstrate current compliance with OSE requirements for this exposed groundwater surface. r Ms.SuzanneJanzen March II,2005 Page 4of4 The Fort Lupton Pit SWSP is included in a combined substitute supply plan for all of Lafarge's South Platte sites. The most recent submittal for Water Year 2005 was in a letter to the SEO dated December 28,2004. The most recent submittal is pending. The replacement sources include a lease from the City of Greeley for winter depletions and historic use credit from the recharge of 25 Fulton Ditch shares. Lafarge is in the process of completing a lease with Consolidated Mutual Water Company (CMWC) to provide a summer replacement source for the combined South Platte plan. Lafarge will submit a copy of this lease to the SEO by March 31,2005. 23: The applicant must submit a copy of the Well Permit for the currently permitted Riverbend Operation to demonstrate current compliance with the OSE requirements. Lafarge submitted a well permit application for the Riverbend Operation to the State Engineer's Office in a letter dated July 11, 2002. The application remained pending. Lafarge's timeline for the start of operations changed and the permit application expired on July 6,2003. Lafarge will file a new well permit application to the SEO,complete the 600-foot well inspection process, and obtain approval of the permit prior to the exposure of any groundwater at the site. We trust that you will find this information'helpfiil. If you have any questions or need additional information,please do not hesitate to call me at(303)452-6611. Cordially„ Applegate Group, Inc. ZeZek— Donald E.Frick, .I.T. Richard T.Raines, P.H. Water Resource Engineer Senior Water Resource Specialist CC_ AG File No. 05-107 LAFARGE NORTH AMERICA Construction Materials RIVERBEND 112 RECLAMATION PERMIT M-2000-016 AMENDMENT APPLICATION Prepared by: Lafarge West, Inc. Resource Management Group GL 420 November 2004 This Table of Contents was updated in conjunction with the USR Application. June 23, 2005 EXHIBIT A 4 LEGAL DESCRIPTION 4 EXHIBIT B 8 INDEX MAP 8 EXHIBIT C 9 PRE-MINING AND MINING PLAN MAPS 9 Flood Insurance Rate Map (FIRM) 10 EXHIBIT D 11 MINING PLAN 11 General 11 Methods of Mining 12 Roads and Conveyors 14 Mine Schedule 15 Equipment 16 Proposed Diversion Channel Design 17 Proposed Overhead Conveyor and Conveyor Belt Bridge Piers Drawings 18 EXHIBIT E 19 RECLAMATION PLAN 19 Seed Mix for Upland Areas 23 Seed Mix for Marsh Areas 23 Seed Mix for Detention Basin Areas 24 EXHIBIT F 25 RECLAMATION PLAN MAP 25 EXHIBIT G 26 WATER INFORMATION 26 Riverbend Pit Groundwater Study 28 Groundwater Monitoring Program 29 Gravel Well Permit Application 30 Water Balance- Dewatering, Operational, &Evaporation Losses 31 Certification Authorization to Discharge under the CDPS Industrial General Permit for Sand and Gravel Mining and Processing General Permit (CDPS Permit) 32 Stormwater Management Plan 33 EXHIBIT H 34 WILDLIFE INFORMATION 34 Wildlife Resources Assessment 35 Wildlife Resources Assessment transmittal to Colorado Department of Wildlife 36 Preble's Meadow Jumping Mouse Presence/Absence Survey 37 Preble's Meadow Jumping Mouse Presence/Absence Survey transmittal, USFWS 38 EXHIBIT I 39 Ft Lupton Pit ()MG 112 Permit Page 1 of 86 This page was updated in conjunction with the USR Application. June 23, 2005 SOILS INFORMATION 39 Soils Map 56 EXHIBIT J 58 VEGETATION INFORMATION 58 Wetland Delineation Studies For Properties Located Near Ft. Lupton, Colorado 59 EXHIBIT K 60 CLIMATE 60 EXHIBIT L 62 • RECLAMATION COSTS 62 EXHIBIT M 63 OTHER PERMITS AND LICENSES 63 EXHIBIT N 64 SOURCE OF LEGAL RIGHT-TO-ENTER 64 Donald L. Rittenhouse & Suzanne Rittenhouse Quit Claim Deed and Gravel Property Lease 65 Mineral Reserves, Inc. Warranty Deed 66 Lafarge West, Inc. Warranty Deed 67 Steven S. McWilliams Warranty Deed and Gravel Property Lease 68 Chikuma Family, LLC. Bargain Sale Deed and Gravel Property Lease 69 City of Thornton Special Warranty Deed and Partial Assignment and Consent Agreement 69 Mineral Reserves, Inc. Special Warranty Deed, Bargian and Sale Deeld and Warranty Deed 70 Mineral Reserves, Inc. Special Warranty Deed, Personal Warranty Deed, and Bargian and Sale Deeld 71 D&S Mining Quit Claim Deed 712 Freda L. Dreiling Living Trust Warranty Deed and Quit Claim Deed 723 Affidavit—Phases 2, 3, 7, 8 75 EXHIBIT O 76 OWNER OF RECORD OF AFFECTED LAND AND OWNER OF SUBSTANCE TO BE MINED 77 EXHIBIT P 78 MUNICIPALITIES WITHIN Two MILES 78 EXHIBIT Q 79 PROOF OF MAILING NOTICES TO COUNTY COMMISSIONERS 79 PROOF OF MAILING NOTICES TO SOIL CONSERVATION DISTRICT 81 EXHIBIT R 83 PROOF OF FILING WITH COUNTY CLERK OR RECORDER 83 EXHIBIT S 84 Ft Lupton Pit DMG 112 Permit Page 2 of 86 PERMANENT MAN-MADE STRUCTURES WITHIN 200 FEET OF THE AFFECTED LAND 84 GEOTECHNICAL STABILITY EXHIBIT 85 Ft.Lupton Pit L)MG 112 Permit Page 3 of86 CONSTRUCTION MATERIALS REGULAR(112)OPERATION RECLAMATION PERMIT APPLICATION FORM CHECK ONE: There is a File Number Already Assigned to this Operation Permit ft M - - (Please reference the_ftile number currently assigned to this operation) New Application(Rule 1.4.5) X Amendment Application(Rule 1.10) Conversion Application(Rule 1.11) Permit ii M -1llp4 01 6 - (provide for Amendments and conversions of existing permits) The application for a Construction Materials Regular 112 Operation Reclamation Permit contains three major parts:(1)the application form;(2)Exhibits A-S,Addendum 1,any sections of Exhibit 6.5(Geotechnical Stability Exhibit;and(3)the application fee. When you submit your application, be sure to include one (1) complete signed and notarized ORIGINAL and one (I) copy of the completed application form,two(2)copies of Exhibits A-S,Addendum 1,appropriate sections of 6.5(Geotechnical Stability Exhibit,and a check for the application fee described under Section(4)below. Exhibits should NOT be bound or in a 3-ring binder,maps should be folded to 8 1/2"X 11"or 8 1/2'X 14'size. To expedite processing,please provide the information in the format and order described in this form. GENERAL OPERATION INFORMATION Type or print clearly,in the spaceprovided,ALL information requested below. Lafarge West, Inc- Applicant/operator or company name(name to be used on permit): ---. 1.1 Type oforganization(corporation,partnership,etc.): Corporation 1.2 I.R.S.Tax I.D.No.or Social Security Number: 2. Operation name(pit,mine or site name): Riverberid Operation - 3. Permitted acreage(new or existing site): 437 permitted acres 3.1 Change in acreage(+) 931 acres 12 Total acreage in Permit area 1 16R acres 4. Fees: 4.1 New Application $2344.00 application fee 42 New Quarry Application $2,906.00 quarry application 4.4 Amendment Fee $1,938.00 amendment fee 4.5 Conversion to 112 operation(set by statute) $2344.00 conversion fee 5. Primary commoditie(s)to be mined: Sand Gravel Fill 5.1 Incidental commoditie(s)to be mined: 1. NA - lbs./Tons/Yr 2. / lbs/Tons/yr 3. / lbs/Tons/yr 4_ / lbs/Tons/yr 5. / lbs/Tons/yr 52 Anticipated end use of primary commoditie(s)to be mined: Construction Materials 5.3 Anticipated end use of incidental commoditie(s)to be mined: NA z Name of owner of subsurface rights of affected land: Refer to Exhibit 0 If 2 or more owners,"refer to Exhibit 0". Name of owner of surface of affected land: Refer to Exhibit 0 8_ Type of mining operation: —Surface _Underground 9_ Location Information: The center of the area where the majority of mining will occur. COUNTY: Weld PRINCIPAL MERIDIAN(check one): X 6th(Colorado) 10th(New Mexico) Ute SECTION(write number): s 7, 18, 19 (1,12,13) 67W 24 TOWNSHIP(write number and check direction): T 1 X North South RANGE(write number and check direction): R 66 East X West QUARTER SECTION(check one): NE _ NW SE SW QUARTER/QUARTER SECTION(check one): NE NW SE SW GENERAL DESCRIPTION:(the number of miles and direction from the nearest town and the approximate elevation): The site is locted approximately 1-2 miles southwest of Ft. Lupton and within 2.-miles of the unincorporated community of Wettenburg at approximate elevation of 4924 feet. '0. Primary Mine Entrance Location(report in either Latitude/Longitude or UTM): Latitude/Longitude Latitude(N): deg min sec OR Latitude(N) (5 dermal laces) Longitude(W): deg min sec Longitude(W) (5 decimal places) Universal Tranverse Mercator(UTM) UTM Datum(specify NAD27,NAD83 or WGS 84) NAD83 Zone Modified Northing 1256713 Easting 3190423 II. Primary future(Post-mining)land use(check one): Cropland(CR) Pastureland(PL) General Agriculture(GA) Rangeland(RL) Forestry(FR) Wildlifeliabitat(WL) Residential(RS) X Recreation(RC) Industrial/Commercial(IC) X Developed Water Resources(WR) Solid Waste Disposal(WD) 12. Primary present land use(check one): Cropland(CR) Pastureland(PL) X General Agriculture(GA) Rangeland(RL) Forestry(FR) Wildlife Habitat(WL) Residential(RS) Recreation(RC) Industrial/Commercial(IC) Developed Water Resources(WR) Method of Mining: Briefly explain mining method(e_g_truck/shovel)- Mining will be conducted using front—end loaders, trucks, conveyors, and scrapers. The product will be processed on site. -3 It Correspondence Information: APPLICANT/OPERATOR (name,address,and phone of name to be used on permit) Contact's Name: • Tan Smi th Title: General Manger Company Name: Lafarge West, Inc. Street/P.0_Box: 10170 Church Ranch Way, Suite 200 P_O.Box: City: Westminster State: rnt oiado Zip Code: 80021 Telephone Number. ( 303 )_ 657-4000 Fax Number: ( 303 )- 657-4172 PERMITTING CONTACT (if different from applicant/operator above) Contact's Name: Eric Reckentine Title: Land and Leasing Manager Company Name: Lafarge West, Inc. Street/P.O.Box: 10170 Church Ranch Way.;_ Suite 200 P.O.Box: City: LleStmincter State: Colorado Zip Code: 80021 Telephone Number f 303 )- 657-4330 735.55141 Fax Number: ( 303 1- 657-4037 INSPECTION CONTACT Contact's Name: Kevin Moore Title: Operations Manager Company Name: Lafa ge West. Inc. Street/P.O.Box: tnnn Church Fanch lda3r Suite 200 P.O.Box: City: Westminster State: Colorado Zip Code: 80021 Telephone Number: ( 303 )- 657-4000 Fax Number: ( 303 )_ 657-4037 CC: STATE OR FEDERAL LANDOWNER(if any) Agency: NA Street: City: State: Zip Code: Telephone Number: ( )- CC: STATE OR FEDERAL LANDOWNER(if any) Agency: NA Street: City: State: Zip Code: Telephone Number: ( )-_ .. - On Site Processing: X Crushing/Screening 13.1 Briefly explain mining method(e.g.truck/shovel): Install dewatering trench around perimeter of phases strip topsoil and overburden with scrapers nr droerc excavate avor ith ronr end toaaers List any designated chemicals or acid-producing materials to be used or stored within permit area: 5,000 gal. tank of diesel fuel,::15,000 gal. tank of gasoline, 55—gal. waste oil drums and lubricants. - 16. Description of Amendment or Conversion: If you are amending or converting an existing operation,provide a brief narrative describing the proposed change(s). The amendment proposes the addition of 911 acres to the permitted area. Maps and Exhibits: Two(2)complete,unbound application packages must be submitted. One complete application package consists of a signed application form and the set of maps and exhibits referenced below as Exhibits A-S,Addendum 1,and the Geotechnical Stability Exhibit Each exhibit within the application must be presented as a separate section. Begin each exhibit on a new page. Pages should be numbered consecutively for ease of reference. If separate documents are used as appendices,please reference these by name in the exhibit. With each of the two(2) signed application forms,you must submit a corresponding set of the maps and exhibits as described in the Bowing references to Rule 6.4,63,and 1.6.2(1x6): EXHIBIT A Legal Description EXHIBIT B Index Map EXHIBIT C Pre-Mining and Mining Plan Map(s)of Affected Lands EXHIBIT D Mining Plan EXHIBIT E Reclamation Plan EXHIBIT F Reclamation Plan Map EXHIBIT G Water Information EXHIBIT H Wildlife Information EXHIBIT I Soils Information EXHIBIT J Vegetation Information EXHIBIT K Climate Information EXHIBIT L Reclamation Costs EXHIBIT M Other Permits and Licenses EXHIBIT N Source of Legal Right-To-Enter EXHIBIT 0 Owners of Record of Affected Land(Surface Area)and Owners of Substance to be Mined EXHIBIT P Municipalities Within Two Miles EXHIBIT Q Proof of Mailing of Notices to County Commissioners and Conservation District EXHIBIT R Proof of Filing with County Clerk or Recorder EXHIBIT S Permanent Man-Made Structures Rule I-62(1)(6) ADDENDUM 1 -Notice Requirements(sample enclosed) Rule 6.5 Geolechnical Stability Exhibit(any required sections) 'le instructions for preparing Exhibits A-S,Addendum 1,and Geotechnical Stability Exhibit are specified under Rule 6:4 and 65 and e 1.62(J Xb)of the Rules and Regulation& If you have any questions on preparing the Exhibits or content of the information required, would like to schedule a pre-application meeting you may contact the Office at 303-866-3567. Responsibilities as a Permittee: Upon application approval and permit issuance,this application becomes a legally binding document Therefore,there are a number of important requirements which you,as a permittee, should fully understand. These requirements are listed below. Please read and initial each requirement,in the space provided,to acknowledge that you understand your obligations. If you do not understand these obligations then please contact this Office for a full explanation. ( 1. Your obligation to reclaim the site is not limited to the amount of the financial warranty. You assume legal liability for all reasonable expenses which the Board or the Office may incur to reclaim the affected lands associated with your mining operation in the event your permit is revoked and financial warranty is forfeited; 2. The Board may suspend or revoke this permit, or assess a civil penalty, upon a finding that the permittee violated the terms or conditions of this permit, the Act,the Mineral Rules and Regulations, or that information contained in the application or your permit misrepresent important material facts; t• - 3. If your mining and reclamation operations affect areas beyond the boundaries of an approved permit boundary,substantial civil penalties,to you as permittee can result; /� 4. Any modification to the approved mining and reclamation plan from those described in your approved application requires you to submit a permit modification and obtain approval from the Board or Office; 1719 S. It is your responsibility to notify the Office of any changes in your address or phone number; 1-11.O 6. Upon permit issuance and prior to beginning on-site mining activity,you must post a sign at the entrance of the mine site,which shall be clearly visible from the access road, with the following information(Rule 3.112): a. the name of the operator; - b. a statement that a reclamation permit for the operation has been issued by the Colorado Mined Land Reclamation Board;and, c. the permit number. {� 7. The boundaries of the permit boundary area must be marked by monuments or other markers that are clearly visible and adequate to delineate such boundaries prior to site disturbance. I v 8. It is a provision of this permit that the operations will be conducted in accordance with the terms and conditions listed in your application,as well as with the provisions of the Act and the Construction Material Rules and Regulations in effect at the time the permit is issued. 6 t9. Annually,on the anniversary date of permit issuance,you must submit an annual fee as specified by Statute, and an annual report which includes a map describing the acreage affected and the acreage reclaimed to date(if there are changes from the previous year), any monitoring required by the Reclamation Plan to be submitted annually on the anniversary date of the permit approval. Annual fees are for the previous year a permit is held. For example,a permit with the anniversary date of July 1, 1995,the annual fee is for the period of July 1,1994 through June 30, 1995. Failure to submit your annual fee and report by the permit anniversary date may result in a civil penalty, revocation of your permit, and forfeiture of your financial warranty. It is your responsibility, as the permittee,to continue to pay your annual fee to the Office until the Board releases you from your total reclamation responsibility. {`ra 10_ For joint venture/partnership operators:the signing representative is authorized to sign this document and a power of attorney(provided by the partner(s))authorizing the signature of the representative is attached to this application. Permit Condition: /719 A reportable spill is a spill of any toxic or hazardous substance(including spills of petroleum products)within the mined land permit area reportable to any Division of the Colorado Department of Public Health and the Environment,the National Response Center,the Colorado Emergency Planning Commission,any local Emergency Planning Commission,local Emergency Planning Committee,orthe State Oil Inspector. The Mine Operator shall notify the Division of Minerals and Geology(DMG)of a reportable spill within the mined land permit area using the same timeframe required by the permit,license,notice,statute,rule or regulation governing the reporting of the spill to the other appropriate agency. Notice of a reportable spill shall be FAXed to:Minerals Program Supervisor, Division of Minerals and Geology, FAX (303) 832-8106. The FAX shall include a call-back number of a responsible company official for DMG staff to use as a contact NOTE TO COMMENTORS/OBJECTORS: It is likely there will be additions,changes,and deletions to this document prior to final decision by the Office. Therefore,if you have any comments or concerns you must contact the applicant or the Office prior to the decision date so that you will know what changes may have been made to the application document. The Office is not allowed to consider comments,unless they are written,and received prior to the end of the public comment period. You should contact the applicant for the final date of the public comment period. ion have questions about the Mined Land Reclamation Board and Office's review and decision or appeals process,you may act the Office at(303) 866-3567. 7 tification_ n authorized representative of the applicant, I hereby certify that the operation described has met the minimum ,airements of the following terms and conditions: 1. To the best of my knowledge,all significant,valuable and permanent man-made structure(s)in existence at the time this application is filed,and located within 200 feet of the proposed affected area have been identified in this application (Section 34-32.5-115(4Xe),C.R.S.). 2. No mining operation will be located on lands where such operations are prohibited by law (Section 34-32.5-115(4)(1),C.R.S.; 3. As the applicant/operator,I do not have any extraction/exploration operations in the State of Colorado currently in violation of the provisions of the Colorado Land Reclamation Act for the Extraction of Construction Materials (Section 34-32.5-120,C.R.S.)as determined through a Board finding. 4. I understand that statements in the application are being made under penalty of perjury and that false statements made herein are punishable as a Class 1 misdemeanor pursuant to Section 18-8-503,C.R.S. This form has been approved by the Mined Land Reclamation Board pursuant to section-34-32.5-112,CR.S.,of the Colorado Land Reclamation Act for the Extraction of Construction Materials. Any alteration or modification of this form shall result in voiding any permit issued on the altered or modified form and subject the operator to cease and desist orders and civil penalties for operating without a permit pursuant to section 34-32-123,CRS , Signed and dated this IStt day of (1UJ\J Atk 1!)-0, r , / CI y . 1 If Corporation Attest(Seal) lic 'iUO' Com y Name / / ��f��jy�ypp Signed: Signed:all t/ foal ivit,, f-- Corpora Secretary or Egyirirr`pt CND •'"�. Title: 1/�G w - t4 & C . Town/City/Cognty-Clerk p's G �_ i •.4 - - 3 . O ?p : State of nloroil� )ss- it) c County of ) .\d'jr".... . ...• G The foregoing instrument was acknowledged before me this I day of l lh trAV)-e.( r MOH 0 _,by I cxllt (hthejs r as VP Ciro, 0(stcoal-c=S of Len roe i I P e I nr.- t Notary Public f � ,_,/ .‘4O T4 .q 1 �y/ Aj 1 - = My Commission expires: v /N,us-••--•-. y SIGNATURES MUST BE IN BLUE INK 41 t ms\Constnanon 112doc (07/28/2004) I.-, you must post sufficient Notices at the location of the proposed mine site to clearly identify the site as the location of a nposed mining operation. The following is a sample of the Notice required for Rule 1.62(1 Xb)that you may wish to use. NOTICE ) This site is the location of a proposed construction materials operation. (Name of the Applicant/Operator)I 01GYAP. (,k7 1(PC whose address and phone number is(Address and Phone Number of the Applicant/Operator) IGI1 (i ocr F (Ln 1.4 hi 1 ' eo has applied for a Reclamation Permit with the Colorado Mined Land Reclamation Board. Anyone w shrug to comment on the application may view the application at the(County Name) tibiA County Clerk and Recorder's Office, (Clerk and Recorder's Office Address) II-101 n- n44-3/4 {1t,P. Greeley and should send comments prior to the end of Cr). �-{�,1 J the public comment period to the Division of Minerals`and Geology, 1313 Sherman St,Room 215,Denver,Colorado 80203. Certification: 1 Eric Reckentine hereby certify that I posted a sign containing the above notice for the proposed v nerrnit area known as the(Name of Operation) Fiverbend on (Date Posted) I I•AtQi I 2.(0- a a dV e:iD�+ lees < 2e0 c/ —SIGNATURE DATE MA'S.\tharelvsfoTms\Constructon I I2.doc (07/29/2000) This Exhibit was updated in conjunction with the USR Application. June 23, 2005 EXHIBIT A Legal Description Phase I -Rittenhouse Leased 160.00 acres That part of the NW ' of the Se '/4 of Section 19,Township 1 North, Range 66 West of the 6th Principle Meridian, described as follows: COMMENCING at the Northwest corner of the SE '' of said Section 19; Thence South along the West line of said quarter section a distance of 853 feet to the North line of the Damiana property described in Deed recorded in Book 529, Page 433; Thence East along the North line of said Damiana property 264 feet; Thence North and parallel to the West line of said quarter section a distance of 853 feet, more or less, to the North line of the SE ' of said Section 19; Thence West a distance of 264 feet along the North line of said quarter section to the POINT OF BEGINNING; EXCEPT that portion thereof conveyed to the State Highway Commission of Colorado for highway purposes in Special Warranty Deed recorded in Book 1401, Page 313, described as follows: BEGINNING at a point on the South property line from which the Southeast corner of said Section 19 bears South 54°04' East of distance of 3011.2 feet; Thence along the South property line South 88°39' East a distance of 68.9 feet to the Southeast corner of the property; Thence along the East property line North 0°25'30" West a distance of 856.8 feet to the East-West quarter line of Section 19; Thence along the East-West quarter line of Section 19 South 89°39' West a distance of 159.3 feet; Thence South 4°48' East a distance of 535.9 feet; Thence South 18°50' East a distance of 103.1 feet; Thence South 4°48' East a distance of 223.4 feet, more or less to the POINT OF BEGINNING. AND That part of the W 'A of the SE ' of Section 19, Township 1 North, Range 66 W of the 6"' P.M., described as follows: BEGINNING at a point on the West line of the SE ''A of said Section 19 which is 1310 feet North of the Southwest corner of said SE % of said Section 19; Thence North 504 feet; Thence East 272 feet; Thence South 504 feet; Thence West 272 feet to the PLACE OF BEGINNING; Ft Lupton Pit DING 111 Permit Page 4 of 86 This pare was updated in conjunction with the USR Application. June 23, 2005 EXCEPT that portion thereof included within a parcel of land conveyed to John Schell and Constantine Shell in Quit Claim Deed recorded in Book 1007, Page 39, described as follows: BEGINNING at a point 247 feet East of the Southwest corner of the SW '/ of the SE % of said Section 19; Thence North to a point on the North line of said SW '/4 SE `/ ; Thence East 25 feet to a point; Thence South to a point on the South line of said SW % SE '/<; Thence West 25 feet to the PLACE OF BEGINNING; and EXCEPT that portion thereof lying within the North 10 feet of the S %z of the SE '/ and the South 20 feet of the N %2 of the SE '/ of said Section 19 as conveyed to The Board of County Commissioners of Weld County and to Weld County to be used and maintained as a public road in Warranty Deed recorded in Book 1229, Page 556; and EXCEPT that portion thereof conveyed to The State Highway Commission of Colorado for highway purposes in Special Warranty Deed recorded in Book1401, Page 313, described as follows: BEGINNING at a point on the North property line from which the Southeast corner of said Section 19 bears South 54°04' East a distance of 3011.2 feet; Thence South 4°48' East a distance of 247.6 feet; Thence along the arc of a curve to the left a distance of 186.3 feet, the radius of which arc has a length of 5805 feet, and the chord of which arc bears South 5°43' East a distance of 186.2 feet, to the South property line; Thence along the South property line North 89°50' East a distance of 32.8 feet to the East property line; Thence along the East property line North 0°25'30"West, a distance of 430.3 feet to the North property line; Thence along the North property line North 88°39' West a distance of 68.9 feet, more of less, to the POINT OF BEGINNING. ALSO, Lots 1 and 2 of the SW % of Section 19, Township 1 North, Range 66 West of the 6'h P.M. all in Weld County, Colorado. Phase 2—Mineral Reserves, Inc. do Lafarge West, Inc. Lafarge ownership 79.37 acres The N 'A of the NE '/ of Section 24, Township I North, Range 67 West of the 6`h Prime Meridian, County of Weld, State of Colorado, described as follows: Beginning at the NE corner of said Section 24; thence S 00°25'10"W, along the east line of the N %3 of the NE '/< of said Section 24, 1310.16 feet to the SE corner of the N 'A of the NE '/ of said Section 24; thence S 89°45'34" W, along the south line of the N 'A of the NE / of said Section 24, 2637.68 feet to the SW corner of the N 'A of the NE '/< of said Section 24; thence N 00'12'27" E, along the west line of the N %Z of the NE % of said Section 24, 1309.10 feet to the NW corner of the N 'A of the NE '/ of said Section 24; thence N 89'44'15" E, along the north line of the N 'A of the NE '/ of said Section 24, 2642.54 feet to the Point of Beginning. Ft Lupton Pit TMG/12 Permit Page 5 of 86 This pare was updated in conjunction with the USR Application. June 23, 2005 Phase 3—Lafarge West, Inc. Lafarge ownership 86.08 acres The West %1 of the Southwest 'A of Section 18, Township 1 North, Range 66 West of the 6`h P.M., County of Weld, State of Colorado. Phase 4-McWilliams Leased 76.72 acres All that part of the NW 'A of Section 19, Township I North, Range 66 West of the 6th P.M. which lies west of the center line of the South Platte River, Weld County, Colorado, EXCEPT: A parcel of land located in the NW 'A of Section 19, Township 1 North, Range 66 West of the 6`h Principal Meridian, Weld County, Colorado, more particularly described as follows: Commencing at the northwest corner of said Section 19, thence S 00°11'42" W, along the west line of said NW 'A , a distance of 747.67 feet to the Point of Beginning of said excepted parcel; 1) Thence continuing along said parallel line, N 90° 00'00" EE, a distance of 882.35 feet to the centerline of the main channel of the South Platte River(1997) and continuing along said centerline the following 5 (five) courses; 2) Thence S 22°21'23"W,a distance of 119.58 feet; 3) Thence S 33°19'22" W, a distance of 67.31 feet; 4) Thence S 43°51'39"W,a distance of 182.10 feet; 5) Thence S 46°41'03" W,a distance of 182.88 feet; 6) Thence S 35°51'46"W,a distance of 4.35 feet; 7) Thence departing said centerline, N 90°00'00" W, a distance of 542.31 feet; 8) Thence N 00°33'48" E, a distance of 427.13 feet to the Point of Beginning of said excepted parcel, containing 7.273 acres, more or less. Phase 5- Chikuma Leased 402.47 acres The N %1 of Section 13, Township 1 North, Range 67 West of the 6th Prime Meridian and the W %3 of the NW 'A of Section 18, Township 1 North, Range 66 West of the 6th Prime Meridian, Weld County, Colorado. Less that portion in that Warranty Deed recorded October 23, 1908 in Book 287, Page 208 of the Weld County Records. Phase 6— City of Thornton Leased 166.61 acres The W '/2 of the SW 'A of Section 7, Township I North, Range 66 West of the 6`h Prime Meridian (contains 80 acres more or less), together with Ft Lupton Pit LUNG/R Permit Page 6 of 86 This page was updated in conjunction with the USR Application. June 23, 2005 The E %2 of the SE ''A of Section 12, Township 1 North, Range 67 West of the 6th Prime Meridian (contains 80 acres more or less), all in Weld County, Colorado. Phase 7 and 8-Mineral Reserves,Inc. do Lafarge West, Inc. Lafarge ownership 180 acres The S '/2 of the East 60 acres of the SW '/ of Section 12,Township 1 North, Range 67 West of the 6'"Prime Meridian. The W ''A of the SW ''A of the SE ''A of Section 12,Township 1 North, Range 67 West of the 6`"Prime Meridian. The East 30 acres of the SW ''A of the SE ''A of Section 12,Township 1 North, Range 67 West of the 6th Prime Meridian. All in Weld County, CO. The SE ''A of the NW '/ of Section 12, Township 1 North, Range 67 West of the 6th Prime Meridian and the NW ''A of the SE ''A and the East 30 acres of the NE ''A of the SW ''A of Section 12, Township I North, Range 67 West of the 6`"Prime Meridian, all in Weld County, Colorado. Phase 9(southern portion)—D&S Mining Leased 39.59 acres The NE '/ of the NW '/ of Section 12, Township I North, Range 67 West of the 6'" Prime Meridian (contains 40 acres more or less) in Weld County, Colorado. Phase 9 (northern portion) —Freda L. Dreiling Living Trust The West 30 acres if the West One Half of the Southeast One Quarter(W1/2 SE1/4) of Section 1, Township 1 North, Range 67 West of the 6'" P.M. FL Lupton Pit DMG 112 Permit Page 7 0186 EXHIBIT B Index Map See attached map. r FT.Lupron Pa DMG 111 Perna Page 7 of 81 44:.,b' State highway 52 •' I i 1 i • .� ,�► c ; Fort Cu"ton " ..F...,, 1 Q 'l ,1 t� ` 2.. 1'P 4.A ._ v,. 1 _ _ 1 °o • — I aProperty removed . / N . from DMG permit ; i ' w 1 boundary • ' I . _ ��)\ lNI ,r' . ��"Ar• I _ ..r _, 0.1 - - • fag, I I 1 { ralii 11 ‘?',,, I . 1.1.., I I • I I I {0dcw•ndence I °"' School 442 Weld County Road 6 A• 11 ,:y ERG\ Fort Lupton Properties Figure 1 i`W TIN,R66W,W'h Sections 7, 18 and 19 and T1 N,R67W,NE'4 Section 24, Site Location ERO Rotources core. N'h Section 13,Section 12 and the SW 1/4 Section 1 1842 Clarkvon Areal UTM Coordinates:Zone 13;4434000mN and 514000 mE D.n..r.CO 80218 USGS Fort Lupton,CO Quadrangle•Weld County,Colorado N Prepared for Lafarge NA F3031 8300 1188 He 2647 Figure 1 0l Fox ;3031 830 1199 0 2000 4000 feel July 2004 EXHIBIT C Pre-Mining and Mining Plan Maps Immediately Adjacent Land Owners of Record Property ownership information for immediately adjacent surface landowners of record is contained in the map at the end of this exhibit. Surface Features The primary surface water features within 200 feet of the proposed mine area are the South Platte River and Big Dry Creek. Several irrigation ditches cross the property, including Lupton Bottom Ditch, Meadow Island Ditch No. 1, and the Brighton Ditch. No primary ditches will be relocated and offsets will be maintained according to the Geotechnical Stability Exhibit. Much of the proposed area is located within the 100-year flood boundary. Base flood elevations and flood hazard factors have been determined, see enclosed FEMA maps. Topography Topography may be characterized as flat to very gently sloping over the areas proposed for mining. Current site topography is shown on the Pre-mining Plan Map. Surface slopes are generally to the northeast. Area of Affected Lands The proposed permit area covers 1,368 acres. The total area expected to be disturbed including mine areas, temporary overburden and topsoil stockpiles, and access roads is approximately 1,064 acres. Vegetation The site has historically been used for agriculture, including livestock grazing and agricultural crops. Upland areas vary greatly throughout the site; however, the majority consist of irrigated cropland including corn, onion, mustard, cabbage, and hay. Wetlands Delineation A request for Assessment of Jurisdictional Determination has been submitted to the United States Army Corps of Engineers(Corps). A wetland jurisdictional delineation study has been conducted on the site;this study can be found in Exhibit J. A majority of the wetlands occur along the South Platte River corridor and will not be impacted by mining operations. Lafarge intends to avoid jurisdictional wetlands where possible; however, if disturbance is necessary appropriate Corps permits will be obtained. Permanent or Man-Made Structures All permanent or man-made structures are shown on the attached map, and a list of the structure owners can be found in Exhibit S. Fi Lupton Pit OMG 112 Perna ,•••••-- Page 8 of 81 Flood Insurance Rate Map (FIRM) The enclosed maps depict the floodplain boundary throughout the Site. Ft Lupton Pit DMG 112 Permit Page 9 of8/ r I •insidulaimaaripolij • ROM NORTH AMERICA RO .e 1tcw&k SFIMUS 1031.140 r or.CAS MD WI m-am `"OM RIVERBEND FLOODPLAIN BOUNDARY t "g" NF SKJ r" 11/02/2004 VALE' 1"=2000. RATaa�.!.\Ft. 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MO4• n4• 1w',. _ - A 4NMATTA 'NA.... 1..L,+., w10001,77110 •••r .6 .69..691..W w - -t--jibs- RIVERBEND • IVSC. tali N.Ar. ,N •••••••wwWY WwA l I•a N f CT=CAA in LAN:,- 00211IIIIIIIIIINIK w Oren It na Sit of .,Y•M.YM •-...............-••. -.-._a.. rAN 1 . ..+MLAA, w . -a..• ---a ,----1--- EXHIBIT C4 MINE PLAN pn1. -Theo., I t4a .CC Pt 3100 ` I °la• 1 us, r TIM. in w _ 40_ MSS iMn I iv 'w•• O,.AMMO' r 4a. This Exhibit was updated in conjunction with the USR Application. June 23, 2005 EXHIBIT D Mining Plan General The Riverbend property, MLRB 112 Permit M-2000-016, is a significant commercial deposit of sand and gravel located near the South Platte River. Lafarge will supply local, county, and state governments, as well as private industry with aggregate from this facility. The Riverbend property was initially permitted in 2000 with the Colorado Division of Minerals and Geology and Weld County for sand and gravel extraction and asphalt and concrete batch plant operations. The Weld County Use by Special Review (USR) is permit number 1259. The existing permit area is 237 acres, 120 acres of which will be disturbed by mining. The permit amendment will also incorporate the previously permitted Fort Lupton Pit, MLRB Permit M-1985-088, containing 200 acres. The Ft. Lupton Pit is comprised of the City of Thornton property(Phase 6) and the D & S Mining, Inc. property(Phase 9). The Ft. Lupton Pit was originally permitted as a wet mining operation; the mining method will be amended to de-watering and dry mining, as indicated in this Exhibit. Lafarge intends to amend the Riverbend permits M-2000-016 and USR#1259 to include additional mineable acres,modify the existing mine plan, modify the current reclamation plan, and increase processing capacity at the facility. The amended permit boundary will encompass approximately 1,191 acres, with mining activities anticipated to disturb approximately 860 acres of the site. The remaining un-mined acres will be used for overburden and topsoil stockpiles, offsets from utilities and waterways, and internal road and conveyor access. The amended permit boundary(the Site) is situated directly north of Weld County Road 6, south of Highway 52, east of Weld County Road 10, immediately west of Highway 85 and adjacent to the South Platte River. The northern limit of the Site is located approximately 1-mile southeast of the City of Fort Lupton. Several existing mining operations are located immediately to the south, north and east of this property. Agricultural uses and low density residential lie to the west. The Site has been drilled during several sampling episodes from 1999 through 2004, and testing has been performed to verify the sand and gravel deposits are commercially marketable. Based on test results, Lafarge has determined that the overburden will amount to approximately 6.3 million cubic yards. Overburden exists to an average depth of approximately 6 feet over the entire site. Some of this material may be used for off-site construction needs; however, all overburden needed for the construction of the liner and final reclamation slopes will remain on-site. The average depth of sand and gravel is 29 feet across the Site and mining at the Site is intended to progress down to the claystone bedrock of the Denver Formation. Ft_Lupton Pit DMG 112 Permit Page 11 of 86 This page was updated in conjunction with the USR Application. June 23, 2005 The groundwater level lies 3 to 6 feet below natural ground level. The deposit is therefore classified as a wet alluvial deposit. However, mining operations will be carried out following dewatering. The sand and gravel is catalogued in the report Sand, Gravel, and Quarry Resources, Colorado Front Range Counties (Colorado Geologic Survey, 1974). The Site is comprised of 18 parcels owned or leased by Lafarge and will be conducted in 9 Phases, each with one to five associated mine cells. The mine phases, associated property names, status and property acres is summarized as follows, with appropriate deeds and leases located in Exhibit N: Table 1. Phase Number and Property Owner. Phase Property Name Owned/Leased Property Acres Phase 1 Rittenhouse Leased By Lafarge 160.0 Phase 2 Mineral Reserves, Inc.Owned By Lafarge 79.4 Phase 3 Lafarge West, Inc Owned By Lafarge 86.1 Phase 4 McWilliams Leased By Lafarge 76.7 Phase 5 Chikuma Leased By Lafarge 402.5 Phase 6 City of Thornton Leased By Lafarge 166.6 Phase 7 Mineral Reserves Inc. Owned By Lafarge 70.0 Phase 8 Mineral Reserves Inc. Owned By Lafarge 110.0 Phase 9 D&S Mining Leased By Lafarge 39.6 Phase 9 Dreiling Living Trust Leased By Lafarge 30.4 Plant Site Area Rittenhouse Leased By Lafarge See Phase 1 Mining in phases will limit the area of disturbance at any one time. The phases depicted in Exhibit C are used to indicate the direction of mining. These phases are neither representative of the maximum area of disturbance nor do they limit disturbance to a particular phase. Methods of Mining Overview The typical mining procedure for all phases will be as follows. Any areas slated for protection will be identified in the field to assure that mining operations will be set back as appropriate. Initially, the topsoil and overburden will be stripped with scrapers and stockpiled in the designated stockpile areas identified in Exhibit C. Overburden will also be used to construct berms and as fill in the 3:1 reclamation slopes. Following stripping of the overburden, the deposit will be dry mined through the use of dewatering trenches and pumps. Overburded and topsoil stockpiles will be seeded as appropriate to prevent erosion. Prior to the mining of new cells, a dewatering trench will be constructed around portions of the perimeters. A sump hole will be created at the lowest point of the dewatering trenches. The sump holes and dewatering trenches will allow sediment to settle Ft.Lupton Pit [MG 111 Permit Page 11 of 86 before the water is pumped to the South Platte River and Big Dry Creek using a groundwater discharge pump in accordance with Colorado/NPDES discharge permit regulations. If agreements are obtained, water may also be discharged in the Lupton Bottom Ditch and Brighton Ditch. Pipes transporting the water from the mine will discharge the dewatering water directly into the South Platte River or identified waterway. Water may also be pumped into adjoining cells. When the alluvium is sufficiently dry, front-end loaders will excavate the material and deposit it on conveyors. The mining face will be nearly vertical to Y/:1 slope. The conveyors will transport the material to be processed at the Plant Site area, located in Phase I. The Plant Site area contains the crushing, screening and washing equipment used for the processing of the raw materials. The processed materials will be used on-site at the concrete and asphalt plants and delivered off-site for commercial and government projects. The process area will also include a concrete casting facility where concrete forms will be made for construction projects. The Plant Site area will be approximately 40 acres and will be the last phase mined. All mine areas will drain internally. Uncontrolled releases of surface water and sediment from mining areas will not occur. Storm water collected in the open pit will be managed in accordance with Colorado/NPDES discharge praulits requirements. Sediment generated from localized Storm water runoff and surface drainage will be managed according to the Stormwater Management Plan, enclosed in Exhibit G. An existing drainage located on the eastern edge of Phase 1 will be improved for use as a surface water diversion ditch around the Plant Area, see enclosed Proposed Diversion Channel Design at the end of this Exhibit. Water rights at the Site will be used for dust control operations along the roads and stockpiles. The Water Balance spreadsheet located in Exhibit G estimates the gallons per week necessary to limit dust emissions. The water will be supplied using a 2500-gallon water truck. Overburden Topsoil and overburden will be stripped with scrapers or dozers and placed separately in temporary stockpiles within the permit area limits. The topsoil will be segregated and stored separately from the overburden material as required by Rule 3.1.9(1). The topsoil will be placed in berms around the perimeter of the mine cells and will also serve as visual barriers where appropriate(see Exhibit C). The berms are not expected to exceed 30 feet in height and will have maximum 2:1 side slopes. The topsoil stockpiles will be protected from wind and water erosion by vegetative cover(see Upland Areas Seed Mix, page 20). The stockpiles will be broadcast seeded and incorporated into our weed control program. Weed control consists of monthly inspections and, if necessary, chemical treatments in the applicable fall and spring seasons. Topsoil stockpiles that will be in place for less than one year will not be vegetated. Fi.Lupton Pit OMG 112 Permit Page 13 of 86 The overburden stockpiles will be continuously rotating. Initially, a portion of a phase will be stripped and the overburden stockpiled within the permit boundaries. Once the deposit has been mined from the stripped portion, the stockpile will be removed from the temporary stockpile and used for reclamation. The remaining portion of the cell will then be stripped and the overburden will be stockpiled on the pit floor or placed immediately in the reclamation slope. There will be no permanent stockpiles on this site; all extra overburden will be used to create undulating shorelines or used for off-site projects. Overburden that leaves the site will be transported off site by trucks. It is anticipated the excess overburden material will be used in bridge and road construction in the area. Offsets Lafarge will maintain mining offsets from sensitive areas designated for protection and all structures according to the Geotechnical Slope Stability Analysis conducted by Weiland, Inc. Individual setbacks were determined for each cell and vary from 31 feet to 65 feet from structures and 38 feet to 83 feet from streams. The stream offset will be maintained from all waterways, including South Platte River, Dry Creek, the Lupton Bottom Ditch, Meadow Island Ditch No. 1, and Brighton Ditch. Lafarge will not relocate any ditch or waterway during the mining process; however, individual property lateral ditches will be eliminated. A multitude of oil and gas lines cross the Site as depicted on Exhibit C. Lafarge intends to relocate oil and gas transmission lines, in an attempt to maximize the resource extraction volume, by including sand and gravel from underneath each line. The lengthy time period, from present until the structure needs to be relocated, makes immediate acquisition of relocation agreements from the independent owners difficult. Therefore, the mine cells shown on Exhibit C depict a number of oils and gas lines with potential to be relocated. Lafarge will acquire the appropriate agreements from the owners prior to relocation as required, or the oil and gas line will not be disturbed. If it is not economical to relocate a specific utility, or an agreement with the owner is not acquired,the offsets outlined in the permit application and reflected in Exhibit C will be adhered to. Roads and Conveyors The proposed conveyor crossings of WCR 8 and South Platte River will be enclosed 100- foot spans, approximately 17-foot in height. The bridges are composed of steel; the footings are anchored in concrete. The conveyor bridges will be similar to the Tanabe pit overhead conveyor currently in use(M-2000-002), see the enclosed Proposed Overhead Conveyor and Conveyor Belt Bridge Piers drawings for specifics. Upon completion of mining operations, the conveyors will be removed and all areas affected by the conveyor will be restored to their original condition. Lafarge will utilize the existing farm access points within the Limit of Affected Area for mining operations; the primary internal use road will follow conveyor alignment as shown in Exhibit C. No additional culverts will be constructed. The access roads are approximately 15 feet wide and improvements to the roads may be necessary. The access points will be used for initial transportation of the heavy equipment (scrapers, front-end loaders, etc.) to each phase, removal of some equipment from the site once mining is Ft Lupton Pa DMG 112 Permit Page 14 of 86 This pare was updated in conjunction with the USR Application. June 23, 2005 existing roads and new roads will be restored to their original condition or reclaimed to grass land. Mine Schedule The Riverbend Operation will process approximately 2 million tons of aggregate per year and mine approximately 25 - 30 acres per year. At this rate, Lafarge anticipates mining and reclaiming the Site in approximately 30 years;however, the rate of mining and overall life of mine is dependent upon demand and market conditions. The mine phases and associated mine cells are depicted in Exhibit C. Mining in phases will limit the area of disturbance at any one time. The phases depicted in Exhibit C are used to indicate the direction of mining. These phases are neither representative of the maximum area of disturbance nor do they limit disturbance to a particular phase. Generally; Lafarge believes the mine will progress according to the following time table: Table 2. Life of Mine B Phase S&G ,.,,XY,o,v,1 is Mine ',t,f' t` Deposit Thickness , � a i � Area �. , ft x°t � , acres PHASE 1 ' 29 ' ' r 6 . ? i 28 e ' PHASE 2 `„„ ,° -; 32 30 ''t.:.- ..,4. t",-, 16 PHASE 3 • 4 x 2. 22 -c-t-; s r 1 47 xp �w.x ', w r ° ``tati- , Y PHASE 4 ^x . - 27 1 - ° * , , 58 ..a 2 +1' c s v t PHASE 5 '.;�� 205 ` � r x 112 ' i 20 ['IL--^ aE �', 9 h 41 iaxt r .; 43 , -4'.1('''''';'''-....!"."-,` 34 i " " 38 ',Al'.k a , aT 43 PHASE 6 _ 24 i1(:,,,,,14,41,;: " 65 t ..",11:15__.. : 24 x 's ,' y� � y f a r _ 15 PHASE 7 .114-5,7,..,„ ' 29 "4 n a 100 PHASE 8a ". 36 { ; 24 . '`mo t . ': PHASE 9 s.a 31 a2 20 a PLANT ARE „'t ;3 29 s a * i 37 , : TOTALS 29 t• iy 668 L "- Ft.Lupton Pit OMG 112 Permit Page 15 of 86 Phase Overview Initially, a portable screen and crusher will be used to process material within the existing permit area Phase I located east of the Plant Site area. Lafarge will begin mining by excavating the initial settling basin and clean water pond for the project. The first tailings pond will eventually encompass all of Phase I Cell 2. Phase I Cell I will be utilized as a clean water pond throughout the length of the project. Material from Phase II and following phases will be transported via conveyor system to the processing plant at the Plant Area. Waste from Phase II will initially be deposited in Phase I tailings pond (Phase I Cell 2). Following the mining of Phase I Cells 1 and 2, Lafarge will install a stationary fixed plant and operate the stationary plant simultaneously with the portable equipment until maximum efficiency is achieved. At this time,portable equipment will be removed from the Site; however, during times of increased production Lafarge may reinstall portable equipment on a temporary basis. Lafarge will continue mining in sequential phase order. However,based upon geologic conditions encountered, Lafarge may need to alternate phases to maximize gravel extraction. Mine cell mining order may vary within each phase. In order to gain an understanding of the extent of the mining operation, it is helpful to know the acres disturbed by different aspects of the mine. We have selected a point in time where the mining disturbance could be at its maximum. This occurs during the mining of Phase V Cell 1. The mining face is in the east/west direction will be at its greatest length. The following acres of disturbance apply at this time: A. Stripped overburden and topsoil in anticipation of mining 30 acres B. Active mining area,possible plant site 30 acres C. Topsoil and overburden stockpiles 10 acres D. De-watering trench 10 acres E. Mining face, 2000 ft 10 acres F. Roads 5 acres G. Side slope undergoing backfilling and grading, 600 ft 10 acres H. Side slope being seeded, 600 ft 10 acres 1. Finalization of Compacted Liner Phase IV 25 acres J. Top of slope 5 acres Total disturbance: 145 acres Equipment The following equipment and facilities will be utilized in this operation: Conveyors (50) Secondary Crushers Dozers (3) Graders (2) Loaders (3) Generator Set Scrapers (15) Back Floe (3) Compactors (3) Portable Screen Office Trailer (1) Portable Toilets (2) Primary Crusher(1) Wash Deck Portable Crushers Scale House Ft Lupton Pi! DMG 112 Permit Page/.5 of 81 Proposed Diversion Channel Design Enclosed is the engineering design, including hydrology and hydraulic calculations,for the Plant Area diversion channel. Ft Lupton Pi/ DMG//1 Permit Page/6 of 81 amec October 12, 2004 Thomas E. Leidich Lafarge West, Inc. 1400 W.64th Ave, P.O.Box 21588 Denver, CO 80221-0588 Re: Hydraulic and Hydrology assessment Dear Mr. Leidich: Attached for your review is the proposed channel design for the Rittenhouse Property parcel of the proposed Lafarge gravel mine operations in Weld County, Colorado. The attached calculations include hydrology and hydraulic calculations relevant to designing a diversion channel for the 100-year storm event, pursuant to the requirements set forth in the proposal dated September 20, 2004. The channel shall be a grass-lined trapezoidal channel with a 10-foot bottom width, a 3- foot depth,and 4H:1 V sideslopes. The channel's longitudinal slope will approximate the existing slope along the proposed channel alignment, at 0.3%minimum slope. Please refer to Sheets 1 and 2 for channel location and dimension information. If there are any questions regarding this report,please feel free to contact the undersigned at (303) 935-6505. Thank you for engaging AMEC for this project. Sincerely, AMEC Earth & Environmental, Inc. Bruce Curtis, PE Anne C. otter, PE Principal Engineer Water Resources Engineer W 4271-716054 La Forge Channel P.glgoposalWroposal Inver.doc Subject LaFargeH&H Madety ACR 4271-716054 a/rr� h 9.� Ft-Lupton Drainage Checked Date 10/11/04 J//�� Perimeter Channel Design Approved by Sheet 1 of 2 OBJECTIVE: Assess the existing drainage along the east side of the Rittenhouse property and design a channel to route intermittent flows around the property to the South Platte River. Provide a typical cross-section and lining requirements for the channel. METHOD: Estimate the peak flow for the contributing drainage basin using the Rational Method. Calculate rainfall intensity in inches/hour according to the methodology described in NOAA, 1973. Calculate time of concentration based on sheet flow, shallow concentrated flow and channel flow. Design the channel design using a spreadsheet based on Manning's formula. ASSUMPTIONS: • The design will be based on existing conditions. • The County will not require floodplain and floodway analysis of the South Platte River and/or the rerouted tributary. • A wetland evaluation will be completed by others. • Easements and rights-of-ways will be available on Lafarge controlled property to complete this project and any legal recording or survey of a new easement or right-of-way will be completed by Lafarge or under a separate agreement with AMEC- • Lafarge will supply adequate survey information for the proposed alignment.• AMEC will only define the contributing subbasin and the related peak flow. • Lafarge will provide AMEC with the channel slope. • AMEC will not provide a plan&profile,specifications,an erosion control plan or construction details(except maybe the lining). • AMEC will not meet with the County,and will not obtain permits for this project. • Rational Method Runoff C-Coefficients for light industrial=0.8 • Rational Method Runoff C-Coefficient for pasture=0.3 • Manning's n for grassed channels=0.030 for stability calculations,and=0.035 for capacity calculations. • Allowable velocity for grass-lined channel in erosive soils during the 100-year storm event=5.0 fps(Urban Drainage Table MD-2). • Apply the 100-yr, I-hr rainfall intensity for subbasins with times of concentration(Tc)longer than 60 minutes. CALCULATIONS: • Basin Areas(see Figure 1 for basin locations): 2 2000 f1 2000 f1 lacre Area measured w/planimeter= 0.86801n * * * =79.7oc - 80cc in in 43560/12 2000 ft 2000 ft lacre 2 * * = 22.8ac= 23oc in in 43560ft2 Remainder of Area is pasture,characterized by short,scrub grass and alfalfa= 80-23=57 ac Fie Name V/1121-7160541a Farge Channel Prey Spndsh eeuLLaFuge Cak Shea.DOC Subject Lafarge H&H Made M ACR .bb 4271-716054 aI J e Ft Lupton Drainage checked g' bit- Date 10/11/04 • C Perimeter Channel Design Approved�' j,. Mmet 2 of 2 • See Table I for Tc calculations. For calculation purposes,assume Tc=60 minutes. • Runoff calculations performed using the Rational Method: Q=CIA =0.44*80ac*2.71 in/hr=95.4 cfs Where:Q=Peak flow for the design intensity(cfs) C=runoff coefficient(Appendix 20.A Lindeburg,2001) =(0.8)* 23ac+(03)*57ac =0.44 r80ac( ll 80ac I=Intensity(in/hr)(p.I5 NOAA 1973)=Ymo =1.897+0.439*I x3 *I X'JJ-0.008Z=2.71 in/hr 1x4 Where:Y100= 100-yr, I-hr precipitation X3= 100-yr,6-hr precipitation depth=3.4 in(NOAA 1973) X4= 100-yr,24-hr precipitation depth=42 in(NOAA 1973) Z=point elevation(hundreds of feet).—49.4(site is 4940 ft amsl) A-=watershed area(ac)=80ac ^ • Channel Sizing based on Manning's formula See Table 2 for calculations. CONCLUSIONS/RESULTS: A grass-lined trapezoidal channel at 03%longitudinal slope with the dimensions below will convey the 100-year storm event across the east side of the Rittenhouse property to the South Platte River while maintaining 1 foot of freeboard. Refer to Table I for hydraulic parameters,and Sheets I and 2 for channel details and location information,respectively. 1 3.18 t I 4 H 1018 .I REFERENCES: Urban Drainage and Flood Control District. 2001. Urban storm drainage criteria manual fin three volumes]. Denver CO: Wright Water Engineers. U.S.National Oceanic and Atmospheric Administration(NOAA). 1973. Precipitation Frequency Atlas of the Western US, Atlas No. 2, volume III-Colorado. Silver Spring MD : US Department of Commerce. Fk Name:W\411)-1160b(a Fame Gunnel P,oj Spodduets'aFargc Cak Shen DOC .�G1+ \ - { i \mo t - --z- _ r t .-� _ \ _______._,. �...__ - i {v(obl ':� r I Tnd'ependence 1 School - - ; c; 4.926.1 . D' Water 4947. 4950 sl ii r a � 1 • ! . `! • &� t,t { Rath /�� Tank 1 f'r—, • • _ •• . . i �%i (( o TowA l +_t L .@berg o f iii • b III i 111 1IVU S i l .. c _ \ i t f :', r'Itat II i. m /% — t %Ili :-.r 1 \• m / 1.I" r � r • ! 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CO Ow _ ) 2 § / Q ) « 3 , E - • k & ) 5 ( j « � e2 § . • . § ET- } j / . y ) •§ ( \ \ 01 ± ° ° . 0- / 7p / . § 2 O . & / g I # ) / ( • ® 0U- § ( m . . 0 . . § 9 % > ( / / } ( 6 2 ( . ( § k ) u 6 Z • ± § � 3 . } H " . \ 2 / . < Zr 00 1InE \ 2 . / k \ \ § wWEFQ 2 § § g2 ! c CO •-• ) \ ( 7 ) f = 0 2 . > x , c I § § - � Zw k in / ( o to kR � � • � � ■ g ` , to _13 , / ) ) .. $ _ . a � § k 0 ] \ . � � w § _ / � -I § 0 / a -JU. I z 0 § Oct W W r I N xi 8 (a 5 go a - z -chi�t -g< t z H i'''' 0 W _ I VI16.SO N J Z 1 dQ us U _ W 0 F Z z a W ` a z 0 J a a z g a a.7 O �__�-_ " grnu ae0 /j _ - r� _ `.,1 • • 4 �� n \\ o .__3 \\\ . • : ,;'.i�• : �j...:.�. .. 1Zl �4 � �1 + 0{6 O +B 00+L. 00+9 0. —F-�0+f 07�i�- .. . .: : :• : :.5".:: ::2:-: . •, • `�#:• • / 03Nn SSVHO I 1 �11. Y o E •✓' • h ". i ZZ['0 3d015 I I . . ....-I--;,--.1. N•/ H //a �C I > (..." L // I m / ' 0pp`� i/ / U I V V / WI 11 � 18 \\ I/ /lit c i. `u,' ci II. .11 ,\ // ,.../f` 11 I $ / 11 m w �� o / {\ G II // L U n 11 In / "y II iii/ d 1 / //�.....- iI (11O ii / iii , i ill � ,- / L� 1✓ Eni _ I7 • I i i 4936 i +� . i sir I i ��4936 j j i i i I. 1- 4978 i t + � j !4928 I I i I I I . i : 1 j i 4920 _4p _TO 0 - 20 40 4920 SECTION A-A Cu-,. CITY ." � 550s-WADSWOR7riBLVD. courm ACIDSHEET SUITE 500 Sl,, caaa w SECTION A-A .... . .a LAKEWOOD,COLORADO 80226 DATE 10/12,04 2 one:(303)935-6505 Fax:(303)935-6575 www.amec.com PROJECT Na 01)I_lie043 This Exhibit was updated in conjunction with the USR Application. June 23, 2005 EXHIBIT E Reclamation Plan Design intent This site will be mined and reclaimed to create a diverse, stable and sustainable environment. There are significant opportunities to enhance the South Platte River riparian corridor. There is also potential for future park and trail development on portions of the site. The reclamation plan is designed to accommodate these opportunities. Existing riparian vegetation and wetlands have been identified and will be monitored and protected throughout mining and reclamation. Mining activities will be setback an appropriate distance from all areas designated for preservation. Limited wetland disturbance will be mitigated through appropriate us army corps of engineers 404 permitting procedures. A combination of open water ponds, lined water storage reservoirs, wetlands and upland pastures will be created by the mining and reclamation process. Creative use of materials generated by mining and processing operations will enhance and compliment the existing riparian corridors. Silts will be used to form diverse silt basin wetlands. Excess overburden will be used to vary the shape and slopes of the finished unlined ponds. Several of the mined ponds will be lined to create water storage reservoirs. Wetland mitigation efforts will enhance existing vegetation and restore portions of the eroded river banks. Native and adaptive plantings and ground covers will be used to restore and enhance all areas disturbed by mining activities. Future trail corridors are identified on the map. The main corridor is located along the conveyor alignment for the mining operation. This will allow future trail construction to utilize the road installed to maintain the conveyor and provide a good base for the trail. There are additional opportunities for smaller, low impact trail loops. These trails could provide limited access to riparian habitat for education and wildlife viewing. Potential connections to planned local and regional trails are also identified on the plan. This reclamation plan was developed based on: • A thorough evaluation of the environmental resources and existing conditions on and adjacent to the property; • The context of the property relative to existing and planned land uses in the area; • The volume, depth and configuration of the mineral resource; • The landowners' plans for their properties; and • The rules and policies of weld county, the Colorado division of minerals and geology and other applicable local, state and federal agencies. Key considerations include the following: Ft Lupton Pit DMG 112 Permit Page 19 of 86 • There are two riparian corridors that pass through the property. They include the South Platte River and portions of the existing irrigation ditches. All efforts have been made to preserve and enhance these resources. • This site is located south west of the City of Fort Lupton. Key opportunities include potential parks,trail links, preservation of the existing homestead for a museum, and education opportunities regarding mining, agriculture, oil and gas facilities, wetlands and the river corridor. • There is an opportunity to enhance wildlife habitat through the creation of a combination of open water ponds, silt basin wetlands, river corridor restoration and shoreline plantings. • Portions of the reclaimed property have been designated as lined water storage ponds. • This site is located near the current alignment of the front range trail. This site can be linked to the trial or provide an alternative off-street location for the trail. In addition, shorter, low impact trail loops may be constructed within the property to provide additional opportunities for frail users. • There are several opportunities to enhance and stabilize eroded river banks and restore the adjacent vegetation as part of the wetland mitigation plan for the project. • Silts generated by the mining process can be utilized to create diverse wetlands and add diversity to the habitat along this portion of the river corridor. • There are existing and planned oil and gas facilities on the site. There may be an opportunity to work with the oil and gas companies to enhance the appearance of the facilities. • There is limited overburden on this site. However, excess material can be used as much as possible to vary the slope and configuration of the open water ponds to create more irregular shorelines Post-Mining Land Use Portions of the Site are within the 100-year floodplain of the Platte River. Weld County Department of Planning Services considers land located in the 100-year floodplain to be suitable for agriculture, recreation, and wildlife uses. The post-mining land use, as proposed in this Reclamation Plan, consists of water storage and open water for recreational purposes. Phase 1 Cell 2, Phase 2 Cells I and 2, Phase 3 Cell I, and Phase 5 Cell 2 will be used for silt storage and reclaimed as wetlands. Phase I Cell I, Phase 4 Cell 1, and the Plant Site area will be reclaimed as water storage facilities. All remaining cells will be reclaimed as unsealed groundwater ponds. All other disturbed areas will be vegetated with a native seed mix, as recommended by the Soil Conservation Service(see Upland Areas Seed Mix on page 19). These uses are compatible with the surrounding land uses and with the Weld County planning goals. For both the lined and unlined ponds, Lafarge will concurrently reclaim pit walls where mining has been completed according to the phases outlined in the Mine Plan. The silt storage ponds will be reclaimed as soon as they are filled, according to the phases outlined in the Mine Plan. Reclamation, including regrading and seeding, will be completed in two F.Lupton Pit DMG 112 Permit Page 20 of 86 This pare was updated in conjunction with the USR Application. June 23, 2005 to five years following the completion of mining or filling operations. The mining will leave no highwalls on the property. No acid forming or toxic materials are used or encountered in the mining. There will be no auger holes, adits, or shafts left on the site. Reclamation Measures—Material Handling Site reclamation measures are illustrated in Exhibit F. Reclamation of the site will include three lined water storage ponds,nine unlined open water ponds, seven silt storage areas that will be reclaimed to wetlands or uplands. Phase 1 Cell 1, Phase 2 Cells 1, 2, and existing small pond, Phase 3 Cell 1, and Phase 5 Cell 3 will be used for silt storage and reclaimed sequentially according to phase number. Individual silt storage cells will be reclaimed as wetlands two to five years after capacity is reached. The proposed topography of the reclaimed cells will be fairly flat and approximately one to two feet below the surrounding area. The area will be reseeded with an appropriate marsh or detention basin wetland seed mix (see proposed seed mixes on pages 21 and 22). Phase 1 Cell 1, Phase 4 Cell 1, and the Plant Site area will be reclaimed as water storage facilities. The pit highwalls will be sealed with shale material from the floor of the pit and regraded with overburden material. The sealed reservoir liner designs are currently under draft by Weiland, Inc. Slopes above and 10 feet below the post-mine water level will not exceed 313:1V. Slopes more than 10 feet below the post-mine water level will not exceed 2H:1 V. The topsoil will be spread over the surface of the re-graded slopes in all areas above the post-mining lake level; all topsoil-covered surfaces will be revegetated. All remaining ponds will be reclaimed as unsealed groundwater ponds. All pit walls will be re-graded with overburden material. Slopes above and 10 feet below the post-mine water level will not exceed 3H:1 V. Slopes more than 10 feet below the post-mine water level will not exceed 2H:1 V. Topsoil will be spread over the surface of the re-graded slopes in all areas above the post-mining lake level; all topsoil-covered surfaces will be revegetated with the Seed Mix for Upland Areas, page 19. Scrapers will be used to place the backfilled overburden and topsoil. Using scrapers to layer the lifts at a 3:1 slope ensures a stable configuration. Disturbed areas associated with site access and the conveyor will be scarified, covered with topsoil, and revegetated. Topsoil will be replaced, where required, in reclaimed areas at a depth of approximately six to twelve inches. Site grading will be performed to create stable topography and will be consistent with post- closure land uses. Reclamation quantities and costs are summarized in Exhibit L. Water Overburden and mine materials will be inert and impacts to local surface water or groundwater quality are not anticipated to occur as a result of mining activities. Lafarge Ft Lupton Pit DMG 112 Permit Page 21 of 86 This pare was updated in conjunction with the USR Application. June 23, 2005 West, Inc. will comply with all applicable Colorado water laws and all applicable Federal and State water quality laws and regulations. Wildlife Presently, the area is used for farming and livestock grazing. However, some indigenous species may be temporarily displaced by the proposed mining activities. Existing riparian habitat areas along South Platte River will be undisturbed by the operation. Enclosed is a wildlife assessment performed by a qualified biologist,please review for additional wildlife information. The proposed reclamation of this site will add diversity to this site and enhance wildlife habitat. Topsoiling Topsoils in the proposed mine areas are predominantly Aquolls, Aquents, Bankard sandy loam, and Colombo clay loam. All suitable soil material will be salvaged for topsoil replacement. Topsoil will be replaced, where required, in reclaimed areas at a depth of approximately six to twelve inches. The topsoil will be segregated and stored separately from the overburden material as required by Rule 3.1.9(1). The mine plan map depicts the location and configuration of the topsoil berms. The berms will be protected from wind and water erosion by vegetative cover if in place more than one year. The stockpiles will be broadcast seeded (please see the Seed Mix for Upland Areas) and will be incorporated into our weed control program. Weed control consists of monthly inspections and, if necessary, chemical treatments in the applicable fall and spring seasons. Soil amendments are not expected to be required due to the nature of the soils. However, topsoil samples will be subjected to agricultural testing prior to reclamation to assess fertilizer requirements. The Soil Conservation Services (SCS) will be contacted periodically throughout reclamation for soil tests. SCS soil fertilizer recommendations, if any, will be followed. Revegetation Following topsoil replacement, reseeding will be performed according to SCS recommended practices. Based on SCS guidance for other local projects having similar surficial soils, the following revegetation procedures are anticipated: • Grass seed will typically be planted in unfrozen soil between October 1 and April 30. • Grass seed will be planted with a grass drill, or where necessary, with a broadcast seeder. • The proposed seed mix and application rates in pounds of pure live seed per acre are described on the following pages. • Weed control practices will be implemented as required. The above procedures may be modified as conditions dictate. If a significant invasion of noxious weeds occurs, the area will be mowed periodically for control. Weeds will be Fr.Lupton Pit DING 112 Permit Page 22 of86 mowed before they go to seed during the first growing season. Mechanical control will be used as a first priority. Chemical methods will be used only if no other alternative produces acceptable results. In areas that are peripheral to the post-mining lake,marsh and aquatic plants are expected to establish themselves. The species of plants anticipated to occur naturally along the lake shoreline include cattails, willows,cottonwoods, and bulrushes. These plants should minimize shore erosion potential. The following are the proposed seed mixtures' to be used on site where appropriate: Seed Mix for Upland Areas Common Name Seeding Rate2 Blue Grama 3.0 PLS/ac. @ 20% 0.6 PLS/ac. Side Oats Grama 9.0 PLS/ac. @ 15% 1.4 PLS/ac. Buffalo Grass(bur) 16.0 PLS/ac. @ 10% 1.6 PLS/ac. Western Wheatgrass 16.0 PLS/ac.@ 20% 3.2 PLS/ac. Slender Wheatgrass 11.0 PLS/ac. @ 20% 2.2 PLS/ac. Streambank Wheatgrass II k.0 PLS/ac. @ 15% 1.6 PLS/ac. Seed Mix for Marsh Areas Scientific Name Common Name Aster novae-angliae New England Aster Aster puniceus Swamp Aster Asclepias incarnata Swamp Milkweed Bidens cemua Bur Marigold Eupatorium maculatum Joe Pyeweed Eupatorium perfoliatum Boneset Helenium autumnale Autumn Sneezeweed Liatris spicata Marsh Blazing Star Mimulus ringens Allegheny Monkeyflower Peltandra virginica Arrow Arum Rudbeckia laciniata Cutleaf Coneflower Verbena hastata Blue Vervain Vemonia fasciculata Prairie Ironweed Calamagrostis canadensis Blue Joint Grass Carex comosa Bottlebrush Sedge Carex scoparia Broom Sedge Carex stipata Awl-Fruited Sedge Carex vulpinoidea Fox Sedge Elymus virginicus Virginia Wildrye Ft.Lupton Pit DMG 112 Permit Page 23 of 86 Leersia oryzoides Rice Cut Grass Juncus baltieus Baltic Rush Juncus tenuis Path Rush Scirpus atrovirens Green Bulrush Scirpus cyperinus Wool-Grass Cover Crop: Common Oats, Timothy A colorful blend of species that is well suited for areas that stay very moist throughout the growing season. Planting rate: 36 lbs./acre Leersia oryzoides Rice Cut Grass Panicum virginicum Switchgrass Scirpus validus Softstem Bulrush Spartina pectinata Prairie Cordgrass Cover Crop: Common Oats, Annual Rye This mix is composed of tenacious species that can tolerate areas that are inundated periodically by water. Planting rate: 32 lbs./acre Availability may dictate the need for variety substitution 2 Pure Live Seed pounds per acre; rates shown are for drill seeding; double rates for broadcast seeding. Ft.Lupton Pit DMG 112 Permit Page 24 of 86 5I x I as 1 ■II o I i z I EI r reW 2 H r L ul (, § m �� - , 11 = -2 z -1 I b 1 o' 1 ' 4 ti i ' I m I gsz§ E i 'If F. ,t, '( A _ , +- - =7' „ "t —ea qtr _ , 14 �'� ' I / � T / / / / /" T I 'S ' , 1 `, — ti !1 • •., ` 4: I\ _ -- - ____. #0 , ii't .I. 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I I �, II i I i' al I' � 7 pp t1 /.ii ril —te a _=--rwcw.. ,g` ......--=. _ar 7 I \ N •� I `�` \ ,r r-- S} II \ ` ` II i'lii_ ,I = }I 0 9 v. '//�.�}'// L... _.4. a 0 A p1 IwiII I' t .� � d�A ICI 11 6 �G v AA� 1I\` ii� nil: lL� ty I �I, 11\ II: . i \ e 1 I I I i SS i ^. ON.N:H SCVOil N3N 03S0d0ad - - - 5300210 lYdun L ANONnoe 1N3i3SY3 I —-—- —-— AacN00e 33NY€NO:SIO I i - - - 3NIC NOILOES 0x131:00 30X34 .-.-.__.-..,-._.-.- 30I: N3Xod I CVON 03AYd I I = — _ — = OVON Sill,: SNIr.51x3 , — — SaYON000 xla3d0ad I ———— 0:116211100 15ta3d i I it '1 QN3031I n v I d' z z I // 0 O //6 m m m I / 0 01 v I 11/ ilk m m I HlhON . dIHSNM01 EXHIBIT F Reclamation Plan Map See attached map. Ft Lupton Pit [)MG 112 Permit Page 23 of 81 TOWNSHIP 1 NORTH rf Cu 1 ,� to CO CO ww fj 0 0 LEGEND 1/ < CC i < I( PERMIT BOUNDARY 1 PROPERTY BOUNDARY EXISTING DIRT ROAD ( PAVED ROAD -L4 `_".-._. POWER LINE FENCE - - - - BUILDING I SECTION LINE DISTURBANCE BOUNDRT i EASEMENT BOUNDRY LATERAL DITCHES II PROPOSED NEW ROADS -_ ` MINING LIMITS 11 I1 I {reer . . — \ / • • CELL 3 ... .. !.a —I--/r//"`. I C1-1/1 t I -- / �9/ 7-1 / l 111 \ .ice.=. _ I _ 11 , CELL 14.4 acres ,�, 1I 11 'l - ` .L \ I PHASE 9 / �I A�VA (Open Water — % � if 1 II \\0 Pond) \ f r \\ R R CELL? � �� — � �d \ 4� \\ \ $ -- 32.9 acres \ I \0 \ ` � y, I II 1 I Augmentation PHASE10 I Recharge Pond) t ti I t 1�Q . e �I It I'I— l - --� , , I _ / V tilli , „�. \ _ 'I \\ I4 I PHASES II II11 tt I \ = ^ 1 y 11 I � \ CELL2 L lI \ \ I: CELL 1 I l (Open Water Pond) 11 ) tt i d I 24.4 acres - t 14 \ (Open Water Pond) n t 12 III - � 1 II It �11, 1� lli ' I PHASE 7 I CELL 1 I — PHASE6 /1 V q, CELL] 99.9 acres i mo "`"*- 1 y 64.9 acres 1 ` $1 (Open Water Pond) I o )..) i, (Open Water Pond) I II _?t) t I CELL 2 -+��, I ii ,y II I 14.7 acres / (Open Water Pond) 1 ( /1 /r i..,r.i....._ __„, ..-9"•e'''' jr) ,,,p______,,y,/ 2 it y /, - / I Al Lt'1 — — I l _ �1 r" �; �I i —�_ X11 \ — — r illil / :. . '1• I' '"' • a 1 PROFESSIONAL MOWER'S SfATFd[tQ 5e I,Thomas E Leidich. state that this map a3 pN woe prepared under my supervision and all the formation presented hereon Is true ii and correct to the beet of my knowledge and information. I Date Thomas E Leidich, CO P.E. 31459 I SCALE IN FEET PR Ot PERMIT REVISION 11/04 TEL_ 900' D' 160' 900' 800' -.. �� Cauntour Intern' 2' kill MELT s m a is m eon na H RIVERBEND I ill TIRE NOTES: EXHIBIT F3 RECLAMATION PLAN 1) THE MINING CELL LOCATION AND OMITS ARE CONCEPTUAL.THEIR SIZE MID SHAPE MAY VARY DUE INDEX TO GEOLOGIC AND/OR SITE CONDITIONS. �N W T X pee LN I II/01 p SEE BAR INO REVISION DATE BY "Mae" RED PIAMIN Sw; I OF 3 u Hello