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HomeMy WebLinkAbout20240304_ADI_55-01 �diHESTAT-Q, ROY COOPER Governor ? i' - r ELIZABETH S.BISER Secretary Q AM VIOL WILLIAM E.TOBY VINSON,JR. NORTH CAROLINA Interim Director Environmental Quality March 4, 2024 Certified Mail Return Receipt Requested 7022 0410 0003 1066 6648 Mr. Jason Conner BV Hedrick Gravel and Sand Company PO Box 425 Swannanoa,NC 28778 RE: Lake Norman Quarry Mining Permit No. 55-01 Lincoln County Catawba River Basin Dear Mr. Conner: We have reviewed the modification request your company submitted for the referenced mine site. In order for this office to complete its review of the referenced project in accordance with N.C.G.S. §74-50 and§74-51 of the Mining Act of 1971,please provide the additional or revised information in accordance with the following comments: 1. Please clearly identify and label on the mine map the property lines and names of owners or record of all tracts of land that are adjoining the mining permit boundary. 2. The colored shading for the pit and stockpile area in the legend does not match the areas of the map. Please correct the mine map so the shading on the map matches the legend. 3. The dark orange shading for buffer on the north side of the permit area does not appear in the legend. Please clarify the land use in this area. 4. Wetlands are shown on the map figure no 1-2 drawn by Civil & Environmental Consultants, Inc., however no indication of wetlands is shown on the mine map. Please clearly indicate and label on the mine map the location of all wetlands, streams, and waterways. 5. Please clearly indicate and label on the mine map the location of the 100-year flood zone. 6. Please clearly indicate and label on the mine map the location of Forney Creek with buffers once the proposed relocation has been completed. 7. Please refer to Section D of the mine permit application and provide a reclamation map that clearly illustrates the reclamation plan for the entire site. The map should clearly illustrate the post mining use of the entire site. It should also include all italicized items listed in the application. 8. Please address the enclosed comments from the Mooresville Regional office. D E Q North Carolina Department of Environmental Quality I Division of Energy,Mineral and Land Resources 512 North Salisbury Street 1 1612 Mail Service Center I Raleigh,North Carolina 27699-1612 NORhI CAROLINA - oaaa�emaienmronmenmiuuality /`� 919.707.9200 Certified Mail 7022 0410 0003 1066 6648 Page 2 10. The details on map figure 4-1.1 drawn by Civil&Environmental Consultants,Inc. are illegible. Please provide this map on a full map sheet so the details can be read. Please note, this office may request additional information, not included in this letter as the mining application review progresses. Be advised that our review cannot be completed until all of the items listed above have been fully addressed. In order to complete the processing of your application,please forward two(2)copies of the requested information to my attention at the following address: Division of Energy,Mineral and Land Resources Department of Environmental Quality 1612 Mail Service Center Raleigh,NC 27699-1612 If hand delivering or delivering by shipping company(e.g.,FedEx,UPS),please deliver to our physical address: Division of Energy,Mineral, and Land Resources Department of Environmental Quality 512 N. Salisbury Street, 5th Floor Raleigh,NC 27604 As required by 15A NCAC 5B.0113,you are hereby advised that you have 180 days from the date of your receipt of this letter to submit all of the requested information. If you are unable to meet this deadline and wish to request additional time,you must submit information,in writing,to the Director clearly indicating why the deadline cannot be met and request that an extension of time be granted. If an extension of time is not granted, a decision will be made to grant or deny the mining permit based upon the information currently in the Department's files at the end of the 180-day period. Though the preceding statement cites the maximum time limit for your response,we encourage you to provide the additional information requested by this letter as soon as possible. Your prompt response will help us to complete processing your application sooner. Please contact me at(919) 707-9220 if you have any questions. Sincerely, Adam Parr,PE State Mining Engineer Enclosures: Mooresville Regional Office Comments. cc: Mr. Jerry Eplin, PE Mine Comments for 55-01 Lake Norman Quarry 2/14/2024 • The Legend colors, being used to identify areas, do not identify the correct areas. For example, the pit areas and stockpile areas do not appear to be correct. In addition, a color on the mine map is being used, which has not been identified in the Legend Table. All colors need to be identified on plans and Legend (e.g. orange color along NW side of mine map). Symbols in Legend Table do not match symbols being used on the mine map (e.g. Rock Dam in Legend is stone outlet in silt fence). All symbols need to match. • Acreage for the stream restoration listed total LOD as 34.7 while the application has only listed an acreage of 26.60. The mine map needs to clearly show the areas being added to the permit, including providing the acreage for that area. • Mine map and stream restoration plan contours do not match. The mine map plan and the stream restoration plans need to show accurate existing and/or proposed topo contours. • Mine map shows silt fence with stone outlets and diversion ditches along the South side of Stockpile/Berm area (along North side of Forney Creek relocation). These measures are not sufficient for the drainage area to the proposed measures. In addition, silt fence typically has a life span of 6-9 months. It appears adequate measures will be needed in this area for much longer. Therefore, the proposed measures need to be sufficient for the length of time necessary to conduct the proposed disturbance activities. Note: past aerial photos appear to show sediment traps were installed in these areas. It is unclear why the plans do not show the actual measures that were installed. Also, it should be noted that sediment traps are not rock dams. It is unclear why a different measure was installed if rock dams were supposed to be installed. It is unclear why the stream plans do not show these same measures. The measures on the mine map do not match the stream plans. The stream plans need to have a construction sequence showing how proposed work is to be conducted and when to install proposed measures. The construction sequence needs to clearly show how new stream will be constructed and stabilized prior to redirecting stream flow from old channel to the new channel. • Mine map shows silt fence with stone outlets and diversion ditches along the West side of Stockpile area, located East of the tailings pond. These measures are not sufficient for the drainage area to the proposed measures. In addition, silt fence typically has a life span of 6-9 months. It appears adequate measures will be needed in this area for much longer. Therefore, the proposed measures need to be sufficient for the length of time necessary to conduct the proposed disturbance activities. • Mine map should provide existing topo contours and proposed topo contours for the stream relocation. • The mine map does not show the re-establishment of the stream buffer along the new relocated stream channel. Adequate buffers must be provided along the stream channel. Provide a legend to denote stream buffer. • Proposed topo contours need to be provided for basins. In addition, drainage area maps and basin design calculations need to be provided. Also, stage storage data should be provided to show where surface area has been obtained. • Clearly show all existing and proposed stream crossings for access roads on the mine map. Provide the size of culverts on the plans if culverts will be installed and/or show how access across the stream crossing will be obtained on a permanent basis. • It appears a perimeter berm may be installed, however, the mine plans do not clearly indicate where the berm will be constructed. In addition, the mine map does not show any proposed topo contours for a perimeter berm. • Need to provide a new and updated reclamation plan and map to represent the modification to current site conditions. • Need to provide a map that will show where the new 100 year and 500-year flood plains will be according to FEMA after stream relocation. • Mine plans need to show the proposed topo contours for the stockpile areas. • Ensure mine map clearly shows existing storm drainage systems and/or culverts in streams, including culvert sizes. • The mine map and the stream restoration plans do not show adequate erosion control measures throughout all phases of construction. It appears a more detailed mine map and erosion control plan will be necessary. In addition, a detailed construction sequence needs to be provided on the erosion control plans. Ensure the plans clearly show the acreage to be disturbed. Significant revisions will be needed to provide adequate erosion control measures. Ensure all measures are sized for the proper storm event. Provide all necessary construction details for measures used on the plans. • The Permitted Area Use Map (Fig. 1-2) shows approximately 4.5 acres of wetlands, however, the mine map do not show any wetlands. Ensure wetlands are clearly identified on the mine map. In addition, the proposed borrow waste area on the stream plans does not appear to be located within the Overburden Storage & Berm area. Please clarify. • On the mine map, it appears the 50' mine perimeter buffer has been removed from the NW side of the site. Need to show buffer and/or clarify intent. • Provide adequate temporary and permanent seeding specifications, including riparian seeding specifications and nurse crops. • The 1" = 100' scale on the stream plans does not show overland relief sufficiently. Provide a smaller plan scale which shows topo relief to conduct a sufficient plan review. In addition, provide one standard size plan and one half-size plan. • It appears wetlands may be disturbed with the proposed excavation located South of STA 3+00 of the relocated Forney Creek. In addition, there are no erosion control measures being proposed to prevent sediment damage to the existing stream. Adequate measures must be provided between the disturbed area and live stream at all times. These measures must be shown on the plans and designed for the entire drainage area in which the measures will receive. • Provide topo labels on the plans to identify existing elevations and proposed elevations. • The new constructed stream relocation needs to be constructed completely off-line of the existing stream. Once adequate vegetation and stabilization has been provided for the new stream channel, then the channel can be tied into the existing stream channel to allow rerouting of the stream flow. Revise construction sequence notes and plans accordingly.