20240214_LQS_MRO

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.