20240405_OM_Plan

■ BARNHILL
CONTRACTING
COMPANY
800 Tiffany Blvd.,Suite 200
Rocky Mount, North Carolina 27804
252-823-1021 phone
www.barnhillcontracting.com
RECEIVED
March 30, 2024 APR 0 5 1013
LAND QUALITY
Mr. Samir Dumpor MINING PROGRAM
Division of Water Quality
Washington Regional Office
943 Washington Square Mall
Washington, NC 27899
RE: Small Pit
Chowan County
Operations and Monitoring Plan
Dear Mr. Dumpor:
We are submitting an Operations and Monitoring Plan for the Small Pit in Chowan
County, North Carolina, to ensure that any dewatering activities that may occur in correlation
with mining activities shall not have any adverse effects on any nearby jurisdictional streams
that may be present on the property. Reference is made to the site plan that accompanies this
Operations and Monitoring Plan, which illustrates the mining activities as they shall occur on
the site.
The type of discharge that will be present on the site will be mine dewatering. Barnhill
Contracting Company proposes to dewater mining operations through the following sequence
of events:
1) Erosion Control items will be installed prior to any mining activities on the site.
Sediment Basins (if needed) and Diversion Ditches will be installed per plan design
before mining activities begin in the mining area.
2) Mining will begin in on the most southern edge of the mine excavation limits. Any
topsoil in this area will be stripped and stockpiled for future use on pond slopes.The
topsoil stockpile will be seeded as needed to stabilize. We will strip areas as mining
progresses to prevent unnecessary erosion from occurring. Diversion ditches will be
utilized to divert shed water towards the sediment basin.
3) From our test results the water table is around 8-10' deep. We will excavate an area of
approximately 2 acre to 8-10' deep. We will leave a berm between the 1 acre initial

f
800 Tiffany Blvd.,Suite 200
Rocky Mount, North Carolina 27804
252-823-1021 phone
www.barnhilicontracting.com
excavation and the remaining 6.98 acres that remains. Due to the limited volume we
anticipate need to pump as mining activities extend below the water table, water will be
pumped into initial 2 acre excavation for the remaining 6.98 acres.
4) After all mining activities in this 8.98 acre area are complete, any remaining topsoil
stockpiled will be used to build the slopes of the pond to a grade of 3:1 or flatter above
the water table, and permanently seeded.
Water will be pumped at a rate not to exceed 936,000 gallons per day, as dictated by
our CCPCUA withdrawal permit, utilizing a Thompson 6" submersible pump (model 46HST or
comparable). The estimated volume of water withdrawal from dewatering activities will be
recorded. Storm water will be managed within the pit utilizing silt fence, diversion ditches,
buffers, and sediment basins (if needed). Reference is made to the site plan, which illustrates
the design specifications and size of the sediment basin (if needed).
There will be an undisturbed buffer established between the mine footprint edges and
the jurisdictional ditch edge. The 50' undisturbed buffer along the edge of the mine limits will
be adequately marked with orange safety fence to ensure that heavy equipment does not enter
into this area and land disturbing activities do not occur.
Barnhill Contracting Company will work to inspect and monitor the jurisdictional
features that appear within the property boundary daily, during times that pumping is
occurring. Barnhill Contracting Company will inspect and monitor the features to reaffirm the
presence of the jurisdictional feature and soils, as well as, for the instability, erosion, sloughing,
subsidence,collapse, newly formed sinkholes, wetland vegetation degradation, and/or flooding
of ditch from discharge activities. Barnhill Contracting Company does not foresee any impacts
to the adjacent features or wetlands, but will secure the appropriate 401 Permit if the need
arises.
Together with data collected by NCDENR- Division of Water Quality from their
inspections, Barnhill Contracting Company and NCDENR- Division of Water Quality can
determine if there are any detrimental impacts to the property's jurisdictional features. During
inspections conducted by Barnhill Contracting Company, if there are any detrimental impacts to
the property's wetlands discovered, Barnhill Contracting Company will immediately cease
dewatering activities, and report the discovery to NCDENR- Division of Water Quality
Washington Regional Office. Together, Barnhill Contracting Company and NCDENR- Division of
Water Quality will determine how these impacts can be abated.

w
800 Tiffany Blvd.,Suite 200
Rocky Mount,North Carolina 27804
252-823-1021 phone
www.barnhillcontracting.com
Should you require any additional information, please do not hesitate to contact us.
Yours very truly,
Barnhill Contracting Company
Estimator/Project Manager