20031023 Ver 1_Monitoring Plan ver 2_20020626

Kimley-Horn and Associates, Inc. p
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June 26, 2002 M
P.O. Box 33068
Raleigh, North Carolina
27636-3068
Mr. Rick Shiver
Wilmington Regional Office
North Carolina Department of Environment and Natural Resources
Division of Water Quality
127 Cardinal Drive Extension
Wilmington, NC 28405
Re: Martin Marietta Materials
Rocky Point Quarry
NCG020166
Monitoring Information and Wetlands Standards, Pender County
In Reply to Your Letter of June 10, 2002
Dear Mr. Shiver:
Pursuant to your June 10, 2002 letter and our subsequent meeting (June 18, 2002)
regarding the Rocky Point Quarry, Martin Marietta Materials requested that we
respond to you regarding your comments. We have prepared a response to your
comments (attached) and a revised (Version 2) "Monitoring and Operations Plan"
(attached) that addresses the issues of concern to the North Carolina Department of
Environment and Natural Resources (NCDENR) - Division of Water Quality (DWQ)
with respect to NPDES Permit NCG020166.
We ask that you carefully read over the documentation and figures enclosed as we
have attempted to address all of your concerns. Where possible, we have provided
specific responses to issues you raised in your June 10 correspondence as clarified in
our June 18 meeting.
As discussed during our meetings, DWQ was expecting to have results from the
monitoring plan Martin Marietta Materials implements and a recommendation for a
pumping plan by July 16 (90 days from our initial meeting). To that end, Martin
Marietta Materials is anxious to implement the monitoring plan as soon as possible.
Your timely review of the attached would be greatly appreciated. Please let us know
if there is anything we can do to help facilitate/expedite that review. We do not
believe that the July 16 deadline provides sufficient time to obtain meaningful data
and to develop an appropriate pumping plan. We request that you extend the deadline
90 days so that appropriate data can be collected and analyzed.
We hope you find this submittal useful and responsive to your concerns. We wish to
reiterate that we regard your efforts and guidance to the development of our
programs very important and that the ongoing input from you will be invaluable. The
Monitoring Plan attached will be implemented upon your written concurrence.
¦
TEL [phone]
FAX [phone]
? ? ? Kimley-Horn
and Associates, Inc.
Mr. Rick Shiver, June 26, 2002, Page 2
Martin Marietta Materials and Kimley-Horn look forward to continuing this
cooperative working effort and initiating the data collection.
With Best Regards,
Y-HORN AND ASSOCIATES, INC.
James M. Eis nhardt
Vice President
Copy to: Horace Willson, Martin Marietta Materials
Danny Smith, NCDENR-DWQ, Raleigh
Harlan Britt/Chad EvenhouseBruce Cutright, KHA
H:\PN\011185010\MMM shiver Itr.doc
? ? ? KimleyHorn
and Associates, Inc,
June 26, 2002
Mr. Horace Willson
Martin Marietta Aggregates
PO Box 30013
Raleigh, NC 27622-4550
RE: Surface and Groundwater Monitoring Implementation - Scope of Services
Rocky Point Quarry, Pender County, NC
Dear Mr. Willson:
As requested, Kimley-Horn and Associates has prepared a Scope of Services and
Fee Estimate (attached) to implement the surface and groundwater monitoring plan
presented to North Carolina Department of Environment and Natural Resources
(NCDENR) Division of Water Quality (DWQ) for the Rocky Point Quarry in
Pender County, North Carolina. As with previous scope of services documents
presented to you, it is based on the Master Services Agreement currently in place.
The fee estimate is based on the approved rate schedule and a range of fees for
budgeting purposes. As with previous task authorizations, including the
DRAINMOD modeling task assignment authorized for this project, we will make
every attempt to conduct the work in a cost effective manner while still meeting
your expressed deadlines.
As discussed recently, the attached assumed that Kimley-Horn staff would complete
construction observation services and record well installation data during the
installation. The fee estimate will be reduced if Martin Marietta staff conduct these
activities. We understand that Martin Marietta will contact and contract with well
driller, hydroaxe, grader/excavator and land surveyor directly for the needed support
services. Should you need assistance locating one of these contractors or require
information from us needed to get fee estimates from these contractors, do not
hesitate to contact us. In addition, the scope assumes data collection through to the
NCDENR expressed deadline of July 16, 2002. We anticipate that additional
monitoring will be required beyond that date and that a separate scope of services
will be developed for that effort once NCDENR has agreed to the initial results.
The team is ready and available to initiate the installation and data collection of the
wells. We are currently checking with suppliers on availability of peizometers and
shallow wells. At times there is a back order for these materials (especially with the
continuous recorders).
¦
P,O. Box 33068
Raleigh, North Carolina
27636-3068
¦
TEL [phone]
FAX [phone]
? ? ? KimleyHorn
and Associates, Inc.
Mr. Horace Willson, June 26, 2002, Page 2
Should you have any questions on the attached do not hesitate to contact us. Upon
your authorization the attached scope of services will be initiated immediately.
Sincerely,
K EY-HORN AND ASSOCIATES, INC.
n
James M. >senhardt
Vice President
Attachment
? Kimley-Horn
and Associates, Inc.
Te c h n i c a l M e m o r a n d u m
A,.
Date: June 26, 2002 (VERSION 2)
Project: MARTIN MARIETTA AGGREGATES, Rocky Point, NC.
Subject: Mine Dewatering, Surface and Ground Water Monitoring Plan
NOTE: VERSION 2 is an amendment of the May 9, 2002 version per comments received from
NCDENR-DWQ and supercedes the previous version.
1.0 Introduction
Martin Marietta Aggregates (MMA) operates a limestone aggregate quarry in Rocky Point, North
Carolina. MMA, in cooperation with and in response to a request from the North Carolina
Department of Environment and Natural Resources (NCDENR) Division of Water Quality
(DWQ), will document its dewatering and monitoring program to provide information on the
present and future permitted mine operations. The requested modifications from DWQ wee
initially detailed in a letter from Mr. Rick Shiver, DWQ to Mr. Robert Winchester, MMA, dated
March 5, 2002, and further clarified on April, 16, 2002 in a meeting with DWQ/MMA staff. This
document has been prepared to address the issues requested in the March 5 letter, and as clarified
during the April 16 meeting.
In addition, this document has incorporated clarifications and additional information discussed in
several correspondences and communications with NCDENR-DWQ. These include:
• May 9 letter from MMA to DWQ
• May 24 teleconference between Kimley-Horn and DWQ
• June 10 letter from DWQ to Kimley-Horn
• June I I letter from Kimley-Horn to DWQ
• June 18 meeting between Kimley-Horn/MMA and DWQ
• June 24 memorandum from Kimley-Horn to MMM and DWQ.

H:VW11185010Tma GW_MonitoriM_Planl doc 1 of 10
May 9, 2002
Martin Marietta Aggregates
Rocky Point Quarry
2.0 Background
2.1 Site Setting
The Rocky Point quarry has operated in its present location since 1984. Figure 1 provides a
general location map of the quarry and Figure 2 presents an aerial photograph of the quarry as of
February 2002. The quarry produces approximately 4,000 tons per day of product from the
Eocene age Castle Hayne limestone, a semi-consolidated sandy limestone ranging in thickness in
the quarry area from 5 to 18 feet. The product zone is overlain by sands and clayey sands ranging
in thickness from 20 to 30 feet. Below the producing zone is a thin confining unit that separates
the Castle Hayne limestone from the underlying Peedee aquifer. The confining unit is composed
of clay, silty clay and sandy clay ranging in thickness from, on average, 25 to 35 feet. The
Northeast Cape Fear River is located to the east and south of the quarry area, a distance of
approximately 1.5 to 2 miles from the active boundary of the quarry. The topography of the area
is generally of low relief, ranging from 25 ft. above mean sea level (MSL) on the western side of
the quarry to a low of 5 ft. MSL near the Northeast Cape Fear River. The areas east and south of
the quarry are generally poorly drained soils and well-drained sandy ridges. There are some
wetland areas and/or drainage swales that are all part of the Northeast Cape Fear River floodplain
area or tributaries to the Northeast Cape Fear River.
2.2 Local Hydrogeology
Water table elevations in the area occur from ground surface in the wetland areas near the
Northeast Cape Fear River to 3 to 10 feet below ground surface in the upland areas as reported in
MMA ground water monitoring well records. The hydraulic connection between the near-surface
water table, water levels within the overburden and water levels within the limestone is somewhat
variable. From a regional perspective and over seasonal time scales, these three zones respond to
ground water changes predominantly as a single hydrogeologic unit. However, their properties
are sufficiently different that in the short term, and in local areas, strong vertical gradients can
develop and the units can respond quite differently to changes in ground water pressures.
H.\PN\011185010\Pinal_GW_Monbring-Plan I doc 2 of 11
May 9, 2002
Martin Marietta Aggregates
Rocky Point Quarry
Trexler, B. D., (1974) provides a good description of the hydraulic properties of the Castle
Hayne formation and Giese, G. L., J. L. Eimers and R. W. Coble (1997)2 provide a regional
discussion of the major water-bearing units of the North Carolina Coastal Plain which includes
the Rocky Point Quarry area.
3.0 Purpose of the Dewatering, Surface and Ground Water Monitoring Plan
Operation of the quarry requires dewatering of the overburden and the Castle Hayne Limestone.
This generally results in depression of the water table within the quarry area to an elevation of 2
to 5 ft. above the floor pit (which is approximately 15 to 25 feet below MSL). The cone of
depression created by dewatering extends outside of the active mining front.
DWQ, in their letter of March 5, 2002 regarding compliance with NDPES permit conditions and
potential impacts on nearby wetlands, requested the following (paraphrased):
¦ Develop alternative site specific pumping and monitoring plans. The pumping plans should
consider ways to minimize the impacts of dewatering. The monitoring plans must depict the
cone of depression associated with the mining and future mine expansion.
¦ Install monitoring wells along a transect or in several directions from the dewatering location
to detect the effects of pumping.
¦ Consider the utility of alternative methods of hydrating areas effected by pumping, such as
spray irrigation or other alternatives.
Pursuant to the April 16 meeting, MMA agreed to, among other tasks, prepare a ground water
monitoring and pumping plan that would include the above as goals and specifically include:
¦ Target monitoring well locations,
¦ Develop frequency, goals, and methods for monitoring, and
¦ Identify reporting format and frequency.
Trexler, B. D., 1974. Petrography, Porosity, and Hydraulic Conductivity of the Castle Hayne Aquifer,
Castleflayne, North Carolina. Master's Thesis, North Carolina State University, Raleigh, NC.
2 Giese, G. L., J. L. Eimers and R. W. Coble, 1997. Simulation of Ground-Water Flow in the Coastal
Plain Aquifer System of North Carolina. U. S. Geological Survey Professional Paper 1404-M.
HAPN\011185010\Final_GW_MonOoring_Planl.doc 3 of 11
May 9, 2002
Martin Marietta Aggregates
Rocky Point Quarry
This Technical Memorandum presents a ground water monitoring and pumping program, target
well locations, and monitoring frequency to provide information on the shallow and intermediate
ground water levels outside the active mine area.
The monitoring program, presented herein, assumes mine operations will continue to mine in the
currently permitted upland areas (Tract FI and F2) and anticipates potential data needs for
potential expansion to the east and south, but this future expansion will be dictated by the mine
reserves and economics as well as permitting. If the mine operations plan is modified, the
pumping and monitoring plan will also be modified to achieve the above goals.
The specific goals of the monitoring program are:
1. Monitor shallow and intermediate ground water levels outside of the mine area to provide
background information on current water table elevations prior to any future mine expansion
outside of the currently permitted area.
2. Monitoring the extent of the cone of depression created by mine dewatering.
3. Monitor water levels outside of the proposed perimeter recharge ditch(es) to monitor and
manage recharge to the shallow ground water system and to monitor the efficiency of impact
minimization for areas outside of the mine area.
4. Monitor shallow ground water levels near areas suspected to be wetlands.
5. Manage pumping, discharge points and recharge ditches to minimize impacts from mine
dewatering.
6. Monitor hydrological affects of pumping.
3.1 Pumping and Dewatering Plan
Present Dewatering Methods and Operations: Dewatering for the present mine operations is
accomplished by float-controlled pumps set in two sumps located near the eastern perimeter and
southern perimeter, inside the mined-out area (Figure 3). Trenches along the base of the mining
face direct seepage toward the sumps and maintain a relatively dry working environment for the
mining equipment. Currently, the pumps are activated based on level-controlled floats, and
estimates of total pumpage are made from the pump capacity and hours of operation.
H1PN\011185010\Final_GW_Monitoring_Plant.doc 4 of 11
May 9, 2002
Martin Marietta Aggregates
Rocky Point Quarry
Total pumpage is estimated to vary from 3 to 5 million gallons per day (mgd). The eastern sump
is scheduled to be moved farther south and east (or alternatively a third sump is to be added in
this location) to better control the ground water levels in areas G1 and G2 (Figure 3) and
discharges to Strawberry Branch and the unnamed tributary to Strawberry Branch. Discharge
from the east sump currently is to Strawberry Branch (east of the mine). The southern sump is
positioned to dewater areas F1 and F2 and to provide water for product washing.
Pumping and Dewatering Plan: The goals of the proposed pumping and dewatering plan are:
1. Dewater the mine face sufficiently to allow the equipment to operate efficiently and
safely.
2. Minimize the amount of water necessary to be pumped consistent with goal Number L
3. Limit the spread of the cone of depression from dewatering activities to the planned
mining area using recharge ditches and discharge management.
4. Use discharge points to minimize hydrologic impact to adjacent streams and/or wetlands
from dewatering activities and to promote natural hydroperiod and hydrologic fluctuation
in those areas.
Methodology: Figure 3 illustrates the existing dewatering sumps and the proposed new east
sump location. It is proposed that the current pumping regime (location of pumps, location of
discharges) continue through the initial phase of the monitoring. MMA is proposing a new
pumping plan with a discharge to the original discharge location and monitoring the effects of the
relocation. By phasing the pumping plan during the initial monitoring plan, collection of baseline
data can be initiated immediately while the appropriate measures to implement the proposed
pumping plan can be undertaken (relocation/installation of pump, maintenance of existing
ditches, construction of new recharge ditches and potentially installation of water control and
dissipation structures).
For the proposed pumping plan, the new east sump will be located to the south (of the present
sump location) to better focus dewatering activities in the G1 and G2 areas. Discharge from the
new east sump will be directed into the unnamed tributary to Strawberry Branch (also referenced
as recharge ditch in the text) that forms the northern border for area G2. This recharge ditch will
confine the dewatering cone of depression to the areas south of the ditch and isolate the
Strawberry Branch area from the dewatering activities. Surface water discharges from the two
H MM 1185010\Final_GW_Mon4oring_Planl.doc 50111
May 9, 2002
Martin Marietta Aggregates
Rocky Point Quarry
eastern sumps will be directed into the unnamed tributary to Strawberry Branch and Strawberry
Branch to support and maintain their respective hydroperiod to the extent practicable during
mining activities.
The south sump provides dewatering of the F1 and F2 areas, and provides some overlap with the
new east sump area of influence in the boundary area between areas F and G. Ground water
derived from the south sump will continue to be directed to its current discharge locations but in
the future (pending initial data collection) may be directed into a perimeter recharge ditch that
parallels the western and southern boundary of area Fl, and then directed northward to be
discharged into the unnamed tributary to Strawberry Branch or directed southward to maintain
hydrology and/or base flow to adjacent areas. Figure 3 provides the planned location of the
sumps and recharge ditches. The results of the initial monitoring plan will be evaluated to
determine appropriate recharge ditch cross section and any potential amendments needed to the
proposed pumping plan.
Implementation of the Plan: The following specific actions will be implemented to initiate the
pumping and dewatering plan:
1. The east sump will be relocated (or a third sump will be installed) to the new, more southerly
location.
2. The discharge point for the new east sump will be directed into the existing/historical
recharge ditch (unnamed tributary to Strawberry Branch) as shown in Figure 3.
3.
4. The pumping volume will be accurately recorded for the old and new east sump as well as the
existing south sump (pumping volumes measurements will be taken by one of several
methods to better document actual pumping volumes - pumping volumes will not be based
on manufacturer specifications for capacity but rather field measurements).
5. A rain gage will be used to provide on-site precipitation data (precipitation data will be
collected per National Weather Service guidelines).
6. If the discharge point for the south sump needs to be modified to direct excess water not
needed for product washing into the unnamed tributary to Strawberry Branch via a ditch
along the western and southern border of area F, the ditch will be inspected to determine if
unobstructed flow can occur along the entire planned pathway to the unnamed tributary, or if
HAPN\011105010\Final_GW_Mon?oring_,Planl.doc 6 of 11
May 9, 2002
Martin Marietta Aggregates
Rocky Point Quarry
control structures on side culverts are necessary to maintain head levels and flow within the
ditch.
7. Records of quantities pumped from each sump will be maintained on a daily basis on site for
later consolidation and presentation in an annual report format.
3.2 Surface and Ground Water Monitoring Plan
The goal of the surface and ground water monitoring plan is to gather sufficient information to
identify the area of influence of the dewatering activities and to provide information for
management of the dewatering and recharge activities so as to minimize adverse impacts from
dewatering outside of the mine area.
Methodology: In order to accomplish the above stated goal of the monitoring program, a series
of ground water monitoring wells and monitoring well nests will be installed. Figure 4 illustrates
the three types of wells planned. These are:
1. Shallow wells, generally less than 10 feet deep, designed to monitor shallow ground water
levels in suspected wetland areas to document hydrodynamics for these systems.
2. Overburden wells, generally installed to a depth between 10 feet and 20 feet from ground
surface. These wells are designed to monitor the local ground water table surrounding the
mine area, monitor the expansion of the cone of depression from the pit dewatering and to
provide information on the efficiency of the perimeter recharge ditch.
3. Limestone wells, installed into the limerock unit being mined to provide vertical flow
information, when used in conjunction with the overburden wells, monitor the extent of
expansion of the cone of depression from the dewatering activities, and provide information
on the hydraulic head relationship between the overburden and limestone units.
Scheduling of installation of the monitoring network will be determined in conjunction with mine
operators and DWQ regulatory personnel to meet the necessary terms for permit compliance and
sound environmental management. Figure 5 illustrates the planned location for the monitoring
wells and Table 1 provides the planned monitoring well designation, monitoring frequency and
construction details.
H1PN\0111a5010\Final_GW_Mon0oring_Planl.doc 7 of 11
May 9, 2002
Martin Marietta Aggregates
Rocky Point Quarry
Wells will be installed following North Carolina Well Construction Standards. Well data will be
collected in accordance with established United States Geological Survey practices.
Shallow aquifer monitoring locations are proposed in areas G1, G2, H1, and H2 as well as in two
locations along Strawberry Branch (Figure 5). Each shallow aquifer monitoring location will
consist of a free-water surface monitoring well to monitor for wetland hydrology, and a "nest" of
3 to 4 piezometers (depending on soil stratigraphy) to assess soil water movement and
vertical/horizontal flow gradients in the areas of suspected wetlands. The objectives of the
monitoring nests are to 1) document the presence, or lack thereof, of the water table near the
surface sufficient to meet wetland hydrology criteria, and 2) correlate groundwater flow with the
deeper aquifer monitoring wells to demonstrate the relationship (if any) with the deeper
groundwater systems in these geomorphic features. A sketch of the monitoring well and
piezometer "nest" is shown as an inset in Figure 4. All monitoring wells will be installed using
appropriate methodology to meet applicable regulatory requirements for hydrologic monitoring
purposes. All wells installed will be surveyed and tied to permanent benchmarks.
The data from the monitoring well and piezometers will be collected daily and on a limited basis
by continuous recorder dataloggers attached to each well/piezometer. The units will be
programmed such that readings will be collected daily. The dataloggers will be downloaded on a
monthly basis, at a minimum, to inspect proper function of the monitoring equipment.
The shallow monitoring locations were identified through a field evaluation meeting with the US
Army Corps of Engineers (COE) staff (Mickey Sugg) held on April 30, 2002. The areas visited
during that meeting identified by the COE as suspected wetland areas are those included for
shallow aquifer monitoring on parcels G1, G2, H1, and H2. Shallow monitoring locations were
also included along the wetlands associated with Strawberry Branch. A jurisdictional
determination (JD) as to the extent of wetland areas was not performed at thetime of the site visit
with the COE, so monitoring locations were determined as the closest approximation to location
as discussed in the field. These locations were also based on site topography. Site topography
data (collected in 2002) is illustrated on Figure 6. Additional information regarding the influence
of drainage ditches on suspected wetland areas and the extent of hydric/non-hydric soils is
required by the COE to determine wetland boundaries. Wetland delineation efforts are on-going
and may supplement the proposed plan (contained here) as necessary.
H1PN`011185010\Final_GW_Monitoring_Planl.doc 8 of 11
May 9, 2002
Martin Marietta Aggregates
Rocky Point Quarry
In addition, all well locations were located based on Martin Marietta Materials ownership of
property or rights to access to lands for such purposes. Property ownership around the existing pit
is shown on Figure 7. All well locations are located on lands owned by MMM or on lands in
which mineral rights have been obtained.
The overburden and limestone wells will be located in two transects of 3 well nests each, oriented
east and south of the F and G areas. Each well nest location will include a well screened in the
overburden and a well screened in the limestone unit. This configuration will provide both
horizontal and vertical definition of hydraulic gradients, and in combination with the information
on unit hydraulic conductivities, will provide quantitative information on ground water flow rates.
Each of the overburden and limestone monitoring wells will be measured daily. A limited
number of shallow water table wells will also be instrumented with continuous recorders but,
because of the number of monitoring locations, and the number of peizometers, manual
monitoring on a monthly basis may be performed to supplement water table well data with the
piezometer data.
The physical location of the wells will be dictated by the planned mine expansion. At this time, it
is anticipated that mining operation will continue in Fl and is intended (pending approvals) to
expand into areas GI and G2. Based on this planned development, the two transects of
overburden and limestone wells and the shallow wells should provide sufficient information to
closely evaluate the impacts of mine dewatering. This proposed plan may be modified, however,
if the mine expansion plans are modified or if analysis of the ground water data indicate that
changes are necessary in the monitoring program.
4.0 Summary
The above dewatering, surface and ground water monitoring program will provide information on
dewatering activities, impacts and ground water table elevations near sensitive suspect wetland
systems, provide information on the regional ground water table, monitor the impacts of mine
dewatering on the overburden and limestone geologic units surrounding the mine and provide a
method of managing the perimeter recharge ditches to minimize the expansion of the cone of
H1PN\011185010\Final_GW_Monbring-Plan 1.doc 9 of 11
May 9, 2002
Martin Marietta Aggregates
Rocky Point Quarry
depression in the water table aquifer from mine dewatering activities. The program includes two
transects of overburden wells and limestone wells and areally distributed shallow wells based on
suspect wetland locations adjacent to the existing operation which are also within the planned
mine expansion program. The location and timing of well installation may be modified based on
mine operations and permit compliance needs. The results of the monitoring plan will be used to
assess the proposed pumping plan and to develop amendments to the plan, if necessary.
H1PNW11185010\Final_GW_MonAoring_Plani.doc 10 of 11
May 9, 2002
Martin Marietta Aggregates
Rocky Point Quarry
Table 1: Surface and Ground Water Monitoring Well Program
Rocky Point Quarry, Pender County, NC
Location No. Well Type Planned Total
Depth (ft) Screen Length
(ft) Monitoring
Frequency
1 OB 15 5 DM
1 LS 35 5 DM
2 OB 15 5 DM
2 LS 35 5 DM
2 SH Varies Varies DM
2 PI Varies Point location PM
3 OB 15 5 DM
3 LS 35 5 DM
3 SH Varies Varies DM
3 PI Varies Point location PM
4 OB 15 5 DM
4 LS 35 5 DM
5 SH Varies Varies DM
5 PI Varies Point location PM
6 SH Varies Varies DM
6 PI Varies Point location PM
7 SH Varies Varies DM
7 PI Varies Point location PM
8 SH Varies Varies DM
8 PI Varies Point location PM
9 SH Varies Varies DM
9 PI Varies Point location PM
Notes: OB = Overburden Well
LS = Limestone Well
SH = Shallow Water Table Well
PI - Piezometer
DM = Daily Measurement
PM = Periodic Measurement
H:\PN\011185010\Final_GW_MonAoring_Plant.doc 11 of 11
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Note: Suspected Wetland/Upland
boundaries, as depicted here, are
approximate (based on 1998 aerial
photography and field review) and
are for planning purposes only.
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hydrology were selected based on
on-site discussion with COE on 4130102

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Rocky Point Expansion:
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Shallow Water Table Monitoring "Nest" Typical:

Note: Suspected Wetland/Upland
boundaries,as depicted here are
approximate (based on 1998 aerial
photography and field review) and
are for planning purposes only.
Monitoring locations for wetland
hydrology were selected based on
on-site discussion with COE on 4130102
Hatched areas are undetermined
regarding jurisdictional wetlands.
Green hatched areas are suspected
to be wetlands based on COE
recommendations due to the presence
of hydric soil. Yellow hatched areas
are approximations of drainage
influence of ditches. Orange hatched
areas lack hydric soil character and
appear to be upland ridges.

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Rocky Point Expansion:
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Figure 7: 1• are hereby nouII.d that Ow afor m.miaw pudic prbnwy A Rocky Point Expansion:
Kindeyr-Hom Site Properties WOOmaden sources should be sorwelted tar verfioalion of Proposed Monitoring Plan
and Associates, Inc Ow brbrmatlon eonbbwd on this map. The Cowdy asswms no
Neal resporwiWlity for the infonne"n oarrhbwd on this map.