North Carolina ground water resources monitoring well network ... annual report

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North Carolina
Ground Water Resources
Monitoring Well Network
2012$Annual$Report!
Susan Laughinghouse, L.G.
North Carolina Department of
Environment and Natural Resources
Division of Water Resources
September 2012
!
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report 1
1.0 Introduction
The State of North Carolina (the State) relies on ground water for approximately 50 percent of its
drinking (potable) water use. In addition, the State has thousands of agricultural and industrial
ground water users. Since 1998, the North Carolina Department of Environment and Natural
Resources (DENR), Division of Water Resources (DWR) has monitored and maintained a
statewide network of monitoring wells to assess North Carolina’s ground water supply. The
operation of this monitoring well network is an essential part of DWR’s mission to ensure that
the State has an adequate water supply for its citizens. Information (data) collected quarterly
from this well network include the following:
• Evaluating climatic influences on the State’s ground water supply, including effects of
drought and recharge-discharge relationships;
• Monitoring human-induced effects on the State’s ground water supply, particularly in the
regional aquifer systems of the Coastal Plain physiographic province. These effects
include local and regional water level declines as well as migration of the fresh water-salt
water interface within various aquifers;
• Providing supporting data for enforcement and creation of current and future ground
water usage regulations, such as the Central Coastal Plain Capacity Use Area rules; and
• Providing high quality ground water data to local governments, ground water
professionals, and the general public to use in making informed decisions in ground water
related issues.
Data collected from the network are available to the public through DWR’s Internet website,
www.ncwater.org. These data include ground water levels, chloride measurements, well
construction information, borehole log construction (lithological and geophysical), ground water
monitoring station locations, and geophysical/lithological data collection from non-DWR well
sites.
2.0 Purpose and Scope
The 2012 Annual Report summarizes field activities and conclusions derived from activities
performed during the July 1, 2011 through June 30, 2012 fiscal year. These activities include
water level and water quality data statistics, monitoring well installations including new
installations, monitoring equipment usage and evaluations, and site surveys.
3.0 Background
The Division of Water Quality (DWQ) and its predecessor agencies initially operated the
statewide Ground Water Resource Monitoring Program. DWQ installed the original network
wells in the 1960s and is responsible for installation of approximately 66 per cent of the current
monitoring well network. DWQ actively monitored the network through the early 1990s,
collecting a portion of the ground water data currently contained within the network database.
The program was transferred to DWR in 1998.
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report 2
The U.S. Geological Survey (USGS) has also
contributed to the monitoring of the State’s ground
water resources under a cooperative agreement between
the State of North Carolina and the Federal
government. The cooperative well network consists of
13 monitoring wells, many of which are also part of the
DWR statewide network.
4.0 DWR Statewide Monitoring Well Network
Overview
4.1 Description
The monitoring well network currently consists of 596
wells at 198 monitoring stations (sites), divided into
five regions, comprising 61 counties (Figure 1). There
are 28 wells located in the Piedmont and Mountain
physiographic provinces (Piedmont and Mountain) and
568 wells located in the Coastal Plain physiographic
province (Coastal Plain). The Coastal Plain relies more
heavily on ground water supplies than either the
Piedmont or Mountains. Subsequently, ground water
monitoring and research has been more concentrated in
the Coastal Plain. In the past few years, more resources
have been invested in monitoring the Piedmont and
Mountain ground water conditions to better understand
the impact of drought cycles on ground water supplies and their
contribution to surface water flow. There are 30 wells within
the monitoring well network used to assess drought conditions
(Figure 2).
Of the 198 monitoring stations, 61 are on State or Federal
property, 51 are located on property owned by local
governments, 84 are located on private property through
agreements with landowners and 2 stations are located on
properties where landowner indicates that the land property
ownership may change. In the past, some wells have been
abandoned at the landowner’s request due to changes in land
use or ownership. Due to the high cost of well construction
combined with the fact that the wells are most valuable when
they are monitored continuously over a period of decades,
every attempt is made to put new stations in secure, stable
locations. A scale has been developed to rank new and existing
well sites for potential well abandonment due to land-use
issues in the future (Table 1). It is preferred that new wells be
installed at sites with a susceptibility rating of 1 or 2.
Laurel Springs Station, Alleghany County
Wilkesboro Station, Wilkes County
North Pitt High School Station, Pitt County
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report 3
4.2 Monitoring
The statewide monitoring network is divided into five regions (Figure 1). One staff member is
responsible for each region. Staff member responsibilities include visiting the wells quarterly to
collect water level data, performing routine site maintenance, keeping automatic data recorders
in working order and keeping sites accessible and esthetically pleasing. Additional site activities
(i.e. recorder removal/replacement, weed/grass maintenance, video-logging, etc.) are conducted
on an as needed basis.
Video-Logging at Hope Plantation, Bertie County
Depth to ground water level measurements are collected from the network in two different ways.
Manual water levels are measured using electronic water level indicators. Hourly water level
measurements are collected using one of two types of automatic water level recorders (shaft
encoders or submersible pressure transducers, vented and unvented). Hourly water level data are
extremely valuable in assessing aquifer recharge, impacts of large storms on ground water
conditions, and delineation of aquifer boundaries. DWR typically publishes only the manual
water level readings and daily water level data from recorders on the website. However, hourly
data is available upon request for specific wells. Table 2 summarizes site and recorder
distribution by region.
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report 4
Triennial chloride samples are collected from select wells in the Coastal Plain. The samples are
analyzed using the Quantab field method. Field results are used to monitor the migration of the
fresh water-salt water interface in the Coastal Plain aquifers. Additional chloride samples are
collected for field analyses when new monitoring wells are installed and as needed for special
projects. The next chloride sampling event will occur September 2013. In addition, a special
chloride sampling is being conducted in September 2012. Section 5.2 summarizes the 2010
chloride sampling event.
5.0 2011-2012 Well Network Statistics
5.1 Ground Water Data Collection
Depth to ground water was measured in 594 wells in the July 1, 2011 through June 30, 2012
fiscal year. The following wells were not measured for four consecutive quarters during the
2011/2012 fiscal year:
• P17E4, Whitley Farms, was dry for two consecutive quarters (August and November
2011), therefore, depth to ground water could not be measured in this well. The well was
placed on the inactive list and abandoned in the spring of 2012.
• O10W1, Hydeland, was interpreted to be a hybrid well and placed on the inactive well
list in 2010. However, water levels were collected from this well in February, May, and
August of 2011. Monitoring well O10W1 is scheduled for replacement.
• O17I3, Bath, was interpreted to be a hybrid well and placed on the inactive list. Water
levels were collected from this well in May and August of 2012.
• V26W1, Robert Black Residence, was placed on the inactive list in December 2011.
Water levels were collected from well O17I3 in August and November of 2011.
Manual water level collection. Electronic water level recorder (Hobo
connected to Shuttle)
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report 5
• CC30P2, Wilmington Airport, was damaged in the fall of 2011. Partial electronic data
was collected during the 2011/2012 fiscal year, however, DWR personnel were unable to
collect manual water levels. This well was abandoned in January 2012.
Table 3 contains DWR monitoring well network statistics from January 1, 2005 through June 30,
2012. Statistics may vary in comparison to previous years due to additional data entry in the
DWR database as older field books are scanned and unrecorded data entered.
Figure 3 compares the number of wells monitored to the water level data collected from the
network from 1967 to present. Hourly water level data is not included in this graph. Calendar
year 2011 represents the most water level data collected in any single year since starting the
monitoring well network operation. This is due to the gradual increase in the number of wells
monitored and the increased use of automatic data recorders. The 2012 data was collected
through June 2012.
Archived water level recorder charts obtained from DWQ with records dating from the 1960s
through 1980s continue to be digitized and data recorded into DWR online database. Additional
continued digitized information recorded in the database includes, but is not limited to, well
construction records, well development, chloride sampling events, memorandums of agreement,
and field notes.
5.2 Triennial Chloride Sampling
The triennial chloride sampling was performed in September and October 2010. Ground water
from 245 wells within the network was sampled for chlorides using Quantab® chloride titrators.
Field data were collected for pH, conductivity, and salinity using YSI® portable probes.
Chloride Sampling
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report 6
The intention of the triennial chloride sampling is to assess the position of the fresh water-salt
water interface within each of the major coastal plain aquifers. Current results are compared to
results of previous sampling events to evaluate potential landward migration of the fresh water-salt
water interface due to aquifer overuse. Chloride sampling results are posted in the database
and the DWR website.
Sampling results indicate that there continues to be concern for salt-water encroachment,
especially near larger pumping centers located near the fresh water-salt water interface (250 parts
per million (ppm) chloride is considered salt water). The September 2010 chloride field
sampling results associated with wells near larger pumping centers illustrate these type of issues:
• Chloride concentrations from October 2010 in the lower Castle Hayne aquifer well
Q16G4 at the Godley Station continue to indicate salt water intrusion with levels of
531 ppm which exceed the 250 ppm threshold for salt water. This station is located
near PCS Phosphate Inc. at Aurora, NC in Beaufort County.
• Chloride concentrations from the Peedee aquifer well Y25Q4 at the Folkstone Station
show a large decrease in chlorides from 252 ppm on September 2007 to BDL (below
detection limit of 33 ppm) in September 25, 2010. This station is located near the
ONWASA Dixon well field in Onslow County.
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report 7
• Chloride concentrations from the Upper Cape Fear aquifer well J22P5 at the Gold
Point Station decreased from 162 ppm in September 2007 to 54 ppm in September
2010. This station is located near the town of Robersonville in Martin County.
• Chloride concentrations from the Upper Cape Fear aquifer well R23X9 at the Cove
City station increased from 352 ppm in October 2007 to 463 ppm in September 2010.
This well is located near the town of Cove City, North Carolina.
Table 4 summarizes the chloride field analysis to date. Chloride sampling will take place again
in September and October 2012.
5.3 Well Installation
From March through May 2012, the following monitoring wells were installed:
• Ivanhoe Station, Ivanhoe, Duplin County, one well, Y34P7;
• Camp Glenn Station in Morehead City, Carteret County, one well, X17J7;
• Whitley Farms in Beaufort County, one well, P17E5; and
• Farmville Marlboro Rd. Station in Farmville, Pitt County, five wells, M27U13, M27U14,
M27U15, M27U16 and M27U17.
The wells were installed using 4-inch PVC riser and 10 or 20 feet of 4 to 4.5-inch stainless steel
continuous wire wrap V-slot screen (wells greater than 70 feet) or 4 inch .020 slot PVC screen
(wells less than 70 feet). The wells were constructed of a gravel pack extending from the bottom
of the screen to a minimum of five feet, but no more than ten feet, above the screen. A minimum
of ten feet of bentonite overlay the top of the gravel pack in order to provide a sufficient
bentonite seal in the well. Table 5 summarizes the monitoring well construction information.
Slotted Screen with Tail Pipe Gravel Pack Installation
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report 8
A pilot hole was not advanced prior to installing the wells at the Ivanhoe, Camp Glenn, and
Whitley Farms stations since these stations had pilot holes advanced in previous years and
geophysical logging was conducted. Pilot holes were advanced and geophysical logging
conducted at the Farmville Marlboro Rd. station prior to well installation. Geophysical and
lithologic log interpretation enabled the DWR staff to assess well screen intervals and the
number of wells to be installed. Borehole advancement and well installation included well
development and chloride measurement collection.
Monitoring wells at Ivanhoe (Y34P7), Camp Glenn (X17J7), and Whitley Farms (P17E5), were
developed from March through June 2012 by pumping. Development removes fine-grained
sediments from the vicinity of the well screen and ensures proper hydraulic connection with the
aquifer. In addition, field data were collected for pH, conductivity, salinity, and temperature in
thirty minute or hourly intervals. Field data exhibiting overall consistency was used to assist in
the decision to stop well development.
Pressure grouting using bentonite grout
Samples for lithologic interpretation Geophysical Logger
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report 9
5.4 Well Maintenance
The well network requires continual maintenance to keep active monitoring stations usable.
Many of the wells exceed 30 years in age and are constructed of materials that are susceptible to
corrosion, especially in acidic or saline ground water conditions. Some older wells were
constructed with outdated, less than desirable construction practices including backfilling
boreholes with cuttings instead of neat cement or bentonite grout. Boreholes backfilled with
cuttings form an inadequate seal and allow other aquifers to influence the water level and water
quality in that well. Another outdated practice included well construction using telescoped
casing. Telescoped casing uses a reducer to trim the well to a smaller diameter casing at depth
apparently to save money during well construction. Telescoped wells are very susceptible to
blockage at the depth of the reducer. Approximately 152 wells in the network were constructed
with reducers. DWR has implemented a long-term program for replacing damaged or unsuitably
constructed wells with new properly constructed wells.
In addition to replacing monitoring wells, DWR was able to repair wells in order to make them
usable. The following wells were repaired between February and June 2012:
• Winsteadville Station, Beaufort County, O15N5, replaced outer casing & shale trap;
• Clark’s Station, Craven County, S22J5, replaced/repaired shale trap;
• Arapahoe Station, Pamlico County, S18U10, removed bent casing and replaced with new
casing and;
• Cox Crossroads Station, Beaufort County, P19M4, installed shale trap and installed
protective sleeve on outer casing.
The shale trap is a bell shaped piece of rubber which is clamped to the PVC casing and placed
below the damaged area of the well. The inside of the shale trap is grouted from where it is
attached to the casing to the surface, in order to seal the damaged area of the well and maintain
the well’s integrity.
Well Development
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report 10
Installation of new and replacement monitoring wells occupies a large portion of DWR’s
resources. Table 5 lists the new wells installed during the 2011-2012 fiscal year. The new wells
are included on Figure 1.
5.5 Automatic Water Level Recorders
Automatic water level recorders play an integral role in the DWR monitoring program. They
allow for economical collection of near-continuous data at remote well stations. Four primary
recorders are utilized and are included Table 6.
Hobo including barometer, shuttle and water level indicator
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report 11
Sutron including card reader, 12-volt battery and voltage meter
Global Water WL16 including iPAQ, field book and calculator
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report 12
5.6 Site Surveys
Concrete survey monuments continue to be installed at each of the 198 monitoring well stations
within the network. Once installation is complete, the monuments will be surveyed using Survey
Grade Global Positioning System (GPS) to calculate the most accurate horizontal and vertical
location data possible. At the end of the fiscal year, 190 monuments had been installed. It is
anticipated that this work will be completed by the end of the year 2012. Surveying of the
monuments will take place once monument installation at each well station is complete.
6.0 Planned Activities for FY 2012-2013
6.1 New Well Installation
Monitoring well network expansion efforts for FY 2012-2013 will be focused on Beaufort,
Bladen, Chowan, Columbus, Duplin, New Hanover, Pender, Pitt, Sampson, Scotland,
Washington, and Wayne Counties. In addition, some wells throughout the network that cannot be
used due to bad construction, screening in multiple aquifers, etc., may be abandoned during this
upcoming fiscal year. Table 7 summarizes the possible upcoming expansion of the network in
2012-2013.
6.2 Well Abandonment
The following wells were abandoned during FY 2011-2012: Whitley Farms, Beaufort County,
P17E4 and Wilmington Airport, New Hanover County, CC30P2.
Gas auger and monument Top of monument - survey point
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report 13
7.0 Summary and Conclusions
The NCDENR, DWR has maintained and monitored a statewide network of ground water
monitoring wells used to assess North Carolina’s ground water supply since 1998.
Data collected from the network are available to the public through DWR’s Internet website,
www.ncwater.org. These data include, but are not limited to, ground water levels, chloride
measurements, well construction information, borehole log construction (lithological and
geophysical), ground water monitoring station locations, and geophysical/lithological data
collected from other (non-DWR) well sites.
The well network consists of 596 monitoring wells at 198 individual stations. From July 2011
through June 2012, ground water level data were collected from 594 wells within the network.
These data include manual measurements taken quarterly from wells, plus hourly water levels
collected using automatic data recorders from 498 wells.
A total of eight monitor wells have been installed at four different stations. One monitoring well
was installed at Ivanhoe (Duplin County), one monitoring well was installed at Camp Glenn
(Carteret County), one well was installed at Whitley Farms (Beaufort County), and five
monitoring wells were installed at Farmville Marlboro Rd. (Pitt County). Borehole advancement
and well installation included, but was not limited to, well development and collection of
chloride measurements.
A total of two wells were abandoned at two different stations: well P17E4 at Whitley Farms,
Beaufort County and well CC30P2 at Wilmington Airport, New Hanover County.
Archived water level recorder charts obtained from the DWQ with records dating from the 1960s
through 1980s continue to be digitized and data recorded into the DWR online database. Survey
monuments continue to be installed at each of the well stations with plans to survey each
monument using Survey Grade GPS.
The triennial chloride sampling was performed on 245 wells in September/October 2010.
Thirteen additional samples were collected from the new well installations between in December
and May 2011. One additional sample was collected from the new installation in April 2012.
Sampling results indicated that there continues to be concern for saltwater encroachment
especially near larger pumping centers located near the fresh-salt water interface. Chloride
sampling will occur again in September 2012.
DWR has tentative plans to expand the monitoring well network by installing thirteen to twenty-six
wells at seven to ten sites in fiscal year 2012/2013. In addition several wells in the network
may be scheduled for abandonment, replacement, and repair.
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report
FIGURES
Legend
New or Improved Monitoring Stations
Active Monitoring Stations
Regions
1
2
3
4
5
Fall Line
0 50 100 150 200 250 Miles
Figure 1: North Carolina Division of Water
Resources Monitoring Stations August 2011
NCDENR
Division of Water Resources
NC Ground Water Resources Monitoring Well Network
2012 Annual Report
0
20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
0
100
200
300
400
500
600
700
Number of Daily Water Levels Collected
Number of Network Wells Measured
Year
FIGURE 3
Water&Level&Data&Collected&from&196752012&
(Plot&includes&both&DWR&and&USGS&Data)&
No. of Wells
No. Daily Water levels (includes both DWR
and USGS wells)
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report
TABLES
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report
TABLE 1
Site Susceptibility Rating
North Carolina Ground Water Resources Monitoring Well Network
2012 Annual Report
Susceptibility Rating Description
1 Secure—station is located on State or
Federal government property
2 Secure—station is located on local
government or school property
3
Moderately secure—station is located on
private property, but landowner does not
give any indication that land use or
property ownership may change
4
Tenuous—station is located on public or
private property and landowner is giving
indications that land use or property
ownership may change
5
Imminent threat—station is on public or
private property and landowner desires
abandonment of well station.
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report
TABLE 2
Site and Recorder Distribution by Region through 6/30/12
North Carolina Division of Ground Water Resources Monitoring Well Network
2012 Annual Report
Region Parameter Number % of Region % of Network
Wells 122 20.5
Sites 41 20.7
Sutrons 0 0.0 0.0
1 WL15s 0 0.0 0.0
WL16s 50 41.0 8.4
Hobos 48 39.3 8.1
All Recorders 98 80.3 16.4
Wells 154 25.8
Sites 41 20.7
Sutrons 3 1.9 0.5
2 WL15s 19 12.3 3.2
WL16s 50 32.5 8.4
Hobos 55 35.7 9.2
All Recorders 127 82.5 21.3
Wells 112 18.8
Sites 26 13.1
Sutrons 3 2.7 0.5
3 WL15s 4 3.6 0.7
WL16s 42 37.5 7.0
Hobos 25 22.3 4.2
All Recorders 74 66.1 12.4
Wells 131 22.0
Sites 42 21.2
Sutrons 0 0.0 0.0
4 WL15s 9 6.9 1.5
WL16s 24 18.3 4.0
Hobos 46 35.1 7.7
All Recorders 79 60.3 13.3
Wells 77 12.9
Sites 46 23.2
Sutrons 6 7.8 1.0
5 WL15s 10 13.0 1.7
WL16s 16 20.8 2.7
Hobos 29 37.7 4.9
All Recorders 61 79.2 10.2
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report 18
TABLE 3
DWR Monitoring Well Network Statistics (1-1-05) through (6-30-12)
North Carolina Ground Water Resources Monitoring Well Network
2012 Annual Report
Parameter 2005 2006 2007 2008 2009 2010 2011 2012
Number of
monitored
wells
542 544 555 565 575 579
591
594
Manual water
levels
(tapedowns)
2,633 2,738 2,618 2,468 2,556 2,911 2627 1394
Daily water
levels
(automatic
recorders
89,088 92,827 95,333 107,883 122,969 131,325 136,209 61,746
Total hourly
water levels 2,141,368 2,229,355 2,294,909 2,591,483 2,961,371 3,163,229 3,276,498 1,479,961
Chloride
Samples 17 22 175 12 17 251 21 1
Geophysical
& lithologic
logs at new
stations
2 1 3 1 1 0 2 1
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report 19
TABLE 4
Chloride Field Analysis to Date
Wells Q16G4, Y25Q4, J22P5 and R23X9
Ground Water Resources Monitoring Well Network
2012 Annual Report
Station Date Chlorides (ppm)
10/04/2010 531
10/01/2007 564
Godley 09/15/2004 137
Station 10/07/1999 91
Q16G4 07/14/1998 174
02/23/1981 No Reading Available
09/22/2010 BDL of 33
09/25/2007 252
Folkstone 09/14/2004 266
Station 10/12/1999 35
Y25Q4 08/06/1998 11
09/25/1982 No Reading Available
10/04/2010 54
Gold Point 09/24/2007 162
Station 09/30/2004 BDL of 28 **
J22P5 09/15/2004 BDL of 28
06/10/2002 10
09/20/2010 463
Cove City 10/05/2007 352
Station 09/13/2004 309
R23X9 10/04/2000 30
Chloride Level for Salt Water 250
**Collected after well development
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report 20
TABLE 5
Well Construction Information
Ivanhoe, Sampson County, Camp Glenn, Carteret County, Whitley Farms, Beaufort County and
Farmville Marlboro Rd., Pitt North Carolina
Ground Water Resources Monitoring Well Network
2012 Annual Report
Well ID Station
Name
Date
Installed
Well
Diameter
(inches)
Well
Depth
(ft bls)
Screened
Interval
(x to y ft bls)
Measuring
Pt. (MP)
(ft)
Aquifer
Water Level
(from MP)
(ft)
Measured - 6/26/12
Y34P7 Ivanhoe 04/13/12 4 135 110-130 2.92 Pee Dee 5.55
Measured – 5/23/12
X17J7 Camp Glenn 03/27/12 4 17 10-15 3.00 Surficial 7.36
Measured – 5/29/12
P17E5 Whitley
Farms 04/19/12 4 35 20-30 2.79 Surficial 9.05
M27U13 Farmville
Marlboro Rd. 05/15/12 4 329 314-324 2.98 To Be
Determined Not Measured
M27U14 Farmville
Marlboro Rd. 05/29/12 4 245 230-240 2.82 To Be
Determined Not Measured
M27U15 Farmville
Marlboro Rd. 06/06/12 4 145 130-140 2.96 To Be
Determined Not Measured
M27U16 Farmville
Marlboro Rd. 05/07/12 4 55 40-50 3.13 To Be
Determined Not Measured
M27U17 Farmville
Marlboro Rd. 05/03/12 4 30 15-25 2.96 Surficial Not Measured
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report 21
TABLE 6
Automatic Water Level Recorders
North Carolina Ground Water Resources Monitoring Well Network
2012 Annual Report
Recorder Type Number in Service*
Sutron Corporation Model 8400A 12
Global Water Instrumentation, Inc. Model WL15 42
Global Water Instrumentation, Inc. Model WL16 182
HOBO U20 Water Level Logger (including separate
barometer per station installed 262 (59 barometers)
*As of June 30, 2012
Note: Due to the large number of recorders employed by DWR, there are, at any given time, a number of units that
are being serviced or replaced. These units are not reflected in the above totals.
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report
TABLE 7
FY 2012-2013 Network Expansion
North Carolina Ground Water Resources Monitoring Well Network
2012 Annual Report
Station Name/Quad County Proposed New Well Screens
(ft bls) Aquifer
20-30 Surficial
100-110 Yorktown
Pocosin Lake Area Washington 200-210 Castle Hayne (upper)
350-360 Castle Hayne (lower saltwater)
500-510 Beaufort
600 Pilot Hole
Ivanhoe Sampson 440-450 Upper Cape Fear
20-30 Surficial
Vicinity of Walnut 45-55 Black Creek or Surficial
Creek Wayne 100-110 Black Creek
220-230 Upper Cape Fear
350 Pilot Hole
(Top of Basement)
Burgaw Pender 20-30 Surficial
630-640 Upper Cape Fear
Kelly Bladen 280-290 Surficial
448-458 Upper Cape Fear
20-30 Surficial
90-100 Castle Hayne
North Central New
Hanover County
New Hanover 220-230 Upper Pee Dee
350-360 Lower Pee Dee
450 Pilot Hole
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report
TABLE 7 (continued)
FY 2011-2012 Network Expansion
North Carolina Ground Water Resources Monitoring Well Network
2012 Annual Report
Station Name/Quad County Proposed New Well Screens (ft bls) Aquifer
20-30 Surficial
30-40 Pee Dee
Vicinity of
Faison/Warsaw
Northwestern
Duplin County
140-150 Black Creek
265-275 Upper Cape Fear
400-410 Lower Cape Fear
448 Pilot Hole
20-30 Surficial
80-90 Yorktown
Between DWR
Godley and Aurora
Beaufort 250-260 Castle Hayne (upper)
440-450 Castle Hayne (lower)
610-620 Beaufort
650-660 Pee Dee
700 Pilot Hole
20-30 Surficial
Nakina Columbus 380-390 Black Creek
844-854 Lower Cape Fear
20-30 Surficial
USGS Core Hole Site
at Fort Fisher/Kure
Beach
New Hanover 95-105 Castle Hayne
160-170 Pee Dee
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report
TABLE 7 (continued)
FY 2011-2012 Network Expansion
North Carolina Ground Water Resources Monitoring Well Network
2012 Annual Report
Station Name/Quad County Proposed New Well Screens (ft bls) Aquifer
20-30 Surficial
110-120 Pee Dee
Vicinity of Moore’s
Creek National Park Pender County 330-340 Black Creek
590-600 Upper Cape Fear
630 Pilot Hole
20-30 Surficial
Turkey Sampson 318-328 Upper Cape Fear
432-442 Lower Cape Fear
20-30 Surficial
Vicinity of Salemburg Sampson 80-90 Black Creek
206-216 Upper Cape Fear
20-30 Surficial
Town of Laurinburg Scotland 120-130 Black Creek
332-342 Upper Black Creek
20-30 Surficial
80-90 Yorktown
Vicinity of Valhalla Chowan 220-230 Castle Hayne
320-330 Beaufort
450-460 Upper Cape Fear
850-860 Lower Cape Fear
1200-1210 Lower Cretaceous
1300 Pilot Hole
Division of Water Resources
NC Ground Water Resources Monitoring Well Network September 2012
2012 Annual Report
TABLE 7 (continued)
FY 2011-2012 Network Expansion
North Carolina Ground Water Resources Monitoring Well Network
2012 Annual Report
Station Name/Quad County Proposed New Well Screens (ft bls) Aquifer
20-30 Surficial
124-134 Yorktown
244-254 Castle Hayne (upper)
Belhaven Beaufort 312-322 Castle Hayne (lower)
388-398 Beaufort
540-550 Pee Dee
720-730 Black Creek
900 Pilot
20-30 Surficial
46-56 Yorktown
River Park North Pitt 110-120 Pee Dee
150-160 Upper Black Creek
252-262 Lower Black Creek
380-390 Upper Cape Fear