Bonnerton Summary Memo 2019 Update

lutrien-
Feeding the Future -
Federal Express
July 23, 2020
Mr. Paul Wojoski
401 and Buffer Permitting Unit Supervisor
NC DEQ— Division of Water Resources
512 N. Salisbury St, #942-E
Raleigh, NC 27604
Dear Mr. Wojoski:
The NC Division of Water Resources issued to PCS Phosphate Company, Inc. 401 Certification No. 3771,
DWQ #2008-0868 version 2.0 on January 15, 2009, for our mine expansion in Beaufort County. Portions
of Conditions 9, 12 and 13 of the Certification require groundwater monitoring of the protected portion
of the Bonnerton Road Non-Riverine Wet Hardwood Forest in order to ensure that the existing hydrology
of this site is maintained.
Monitoring of the hydrology has occurred since 2015, and the first deep well in Bonnerton pumping water
from the Castle Hayne Aquifer was turned on in December 2016. Enclosed is a hard copy and a CD of a
report titled "Wetland Hydrology in the Bonnerton Road Non-Riverine Wet Hardwood Forest — 2019
Update, Beaufort County, North Carolina" reporting on the monitoring results.
If you have any questions, please call me at [phone], or email at [e-mail].
incerely,
L/ ?-
qjA- n,-4
J 11rey . urness
Senior Scientist
Enclosure
PC: Chris Pullinger — DWR, Washington
K. Alnandy
23-01-004-29
S. Cooper — CZR
1530 NC Hwy 306 South, Aurora, NC USA 27806
w/encl.
w/Intro & Summary
w/encl.
w/o encl.
nutrien.com
1 Effective January 1, 2018, PCs Phosphate Company, Inc. is an indirect subsidiary of Nutrien Ltd. PCs Phosphate Company, Inc.
remains the legal operating entity and permittee.

WETLAND HYDROLOGY IN THE
BONNERTON ROAD NON-RIVERINE WET HARDWOOD FOREST- 2019 UPDATE
BEAUFORT COUNTY, NORTH CAROLINA
Prepared for:
PCS Phosphate Company, Inc.
Prepared by:
CZR Incorporated
4709 College Acres Drive, Suite 2
Wilmington, NC 28403
July 2020

TABLE OF CONTENTS
1.0 Introduction....................................................................................
1.1 Area Description.........................................................................
2.0 Methodology...................................................................................
2.1 Water Level.................................................................................
2.2 Rainfall and Drought...................................................................
2.3 PCS Deep Wells and Water Levels in CZR Level TROLLS ..............
3.0 Results and Discussion....................................................................
3.1 Soil Series and Soil Profiles.........................................................
3.2 Rainfall and Drought in 2015-2019.............................................
3.3 Wetland Hydrology......................................................................
3.4 Mine Perimeter Deep Well Pumps and Near Surface Hydrology
4.0 Summary..........................................................................................
5.0 Literature Cited...............................................................................
Cover Photo: view to northeast between wells BHW13 and BHW14, 18 February 2020.
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Bonnerton NRWHF Wetland Hydrology ii PCS Phosphate Company, Inc.
2019 Update July 2020

LIST OF FIGURES
Figure 1
401 Water Quality Certification Conditions 9 and 13 Wetland Hydrology Monitoring.. F-1
Figure 2
Non-riverine Wet Hardwood Forest Areas (135A and 58A) avoided by Mod Alt L.........
F-2
Figure 3
Bonnerton NRWHF Hydrology Monitoring Wells............................................................
F-3
Figure 4
Bonnerton NRWHF Wells and Soil Series........................................................................
F-4
Figure 5
2019 Porter Creek and WETS -Aurora 6N Rainfall...........................................................
F-5
Figure 6
2018 Porter Creek and WETS -Aurora 6N Rainfall...........................................................
F-6
Figure 7
2017 Porter Creek and WETS -Aurora 6N Rainfall...........................................................
F-7
Figure 8
2016 Porter Creek and WETS -Aurora 6N Rainfall...........................................................
F-8
Figure 9
2015 Porter Creek and WETS Aurora 6N Rainfall............................................................
F-9
Figure 10
Bonnerton NRWHF Hydrology Monitoring Sites and Deep Well Locations ..................
F-10
Figure 11
2015 — 2019 Hydrology during Deep Well Pump Operations ........................................
F-11
LIST OF TABLES
Table 1 Monthly and annual rainfall for 2015-2019 recorded at the Porter Creek rain gauge and
at the PCS Aurora 6N station.......................................................................................... T-1
Table 2 Drought conditions for the south side of Pamlico River in the vicinity of South Creek for
theyears 2012-2019....................................................................................................... T-1
Table 3a Hydroperiods for monitoring wells in and near Bonnerton NRWHF areas and upper Porter
Creek during WETS normal and below normal rainfall in 2019...................................... T-2
Table 3b Hydroperiods for monitoring wells in and near Bonnerton NRWHF areas and upper Porter
Creek independent of WETS thresholds in 2019............................................................ T-3
Table 4a Summary of hydroperiods for monitoring wells in and near Bonnerton NRWHF areas and
upper Porter Creek during WETS normal or below normal rainfall from 2015-2019 .... T-4
Table 4b Summary of hydroperiods for monitoring wells in and near Bonnerton NRWHF areas and
upper Porter Creek independent of WETS thresholds from 2015-2019 .........................T-5
Table 5 Bonnerton Deep Well Operation Dates.......................................................................... T-6
Table 6 Details of the final models for Level TROLLS in Bonnerton Hardwood Forest .......................... T-7
Bonnerton NRWHF Wetland Hydrology iii PCS Phosphate Company, Inc.
2019 Update July 2020

LIST OF APPENDICES
Appendix A Soil Profile Descriptions at Bonnerton NRWHF and Upper Porter Creek Monitoring Wells
Appendix B 2015-2018 Wetland Hydroperiods for Bonnerton NRWHF and Upper Porter Creek
Monitoring Wells
Appendix C 2019 Hydrology Graphs of Bonnerton Level TROLLS
Bonnerton NRWHF Wetland Hydrology iv PCS Phosphate Company, Inc.
2019 Update July 2020

1.0 Introduction
Per Conditions 9 and 13 of the modified 401 Water Quality Certification issued in January 2009 for the
PCS Phosphate mine continuation near Aurora NC (DWQ #2008-0868, version 2.0), wetland hydrology of
the portions of the Bonnerton Road non-riverine wet hardwood forest (NRWHF) shown as "135A" and
"58A" on Figure 1 shall be monitored before and after the mine moves through the area between the
avoided NRWHF areas and within the permitted mine boundary (Figure 2). The data collected are to
ensure that the wetland hydrology of the two NRWHF areas avoided by the permitted mine boundary is
maintained after mine impacts are completed and/or the mined -through area has been reclaimed.
1.1 Area Description
The Bonnerton Road NRWHF is located on a peninsula between Durham Creek to the west and Porter
Creek to the east; both creeks flow north to the nearby Pamlico River (Figure 1). Surface water flow of the
peninsula into the two creeks is separated by the divide known as the Suffolk Scarp, a geomorphic feature
whose highest elevation in this vicinity is just to the west of the 135A NRWHF (Figure 1). Slope of the
terrain on the most eastern side of the scarp towards Porter Creek is —0.2 percent, while the slope
approaches 1 percent nearer to the eastern toe of the Suffolk Scarp. Similar to other outer coastal plain
interfluves in North Carolina, where the underlying Castle Hayne limestone is close to the surface, the
forested landscape of the peninsula is gently rolling with occasional small closed depressions and small
non-hydric areas of higher elevation.
2.0 Methodology
2.1 Water Level
To monitor the pre -mine hydrology of the monitored area, a total of 14 semi -continuous electronic Level
TROLL 500 data -logger water level monitoring wells, manufactured by In -Situ, were installed in June and
July 2015 at the locations shown in Figure 3 (BHW1-BHW14). In addition to the 14 wells installed in 2015,
there are six additional wells used to monitor the wetland hydrology adjacent to upper Porter Creek for a
separate project (locations shown on Figure 3). Two other types of monitoring wells have been used at
four of these locations (PCW1, PCW3, PCW4, and PCW6) since 2006 [Remote Data Systems (RDS) WL20s
and WL80s and RDS Ecotone 20s and Ecotone 80s] but Level TROLL 500s have been in place at all six
locations since 2011 (wells at PCW2 and PCWS were added).
Each of the 14 Level TROLLS is housed inside a 2-inch diameter PVC well screen (0.010-inch slots) installed
to a depth of approximately 32 inches and backfilled with filter sand. The recorder is suspended on a
43.75-inch cable in the well screen to record water levels within at least -18.25 inches below the ground
surface and up to +20 inches above the surface. Among the 14 wells the range of water levels which can
be recorded below the surface ranges from -18.25 to -31.75 inches and the range of surface water which
can be recorded ranges from +18 to +26 inches. The units record the water level every 1.5 hours (16 times
per day). The six upper Porter Creek wells are housed inside a 3-inch diameter PVC well screen with 0.010-
inch slots, but the Level TROLL cable is 60.25 inches long and among these wells, the range for below
ground water level is -29.75 to -33.25 inches, and the range of surface water is +32.75 to +36.5 inches.
Bonnerton NRWHF Wetland Hydrology 1 PCS Phosphate Company, Inc.
2019 Update July 2020

(The longer cable is used for the upper Porter Creek wells as part of a different monitoring project
methodology and protocol.) To prevent damage by bears, the above -ground portions of all well screens
were surrounded by a fence enclosure made of metal T-posts and strands of barbed wire. All 20
monitoring wells were checked and downloaded once a month. Most of the 14 wells are located in
portions of the hardwood flat at slightly higher elevations than the six Porter Creek wells; however, no
elevations have been surveyed so perceived differences in elevation are not quantified.
Wetland hydroperiods were calculated for each monitoring well during the growing season. A
hydroperiod is defined as consecutive days during the growing season that the water table is within 12
inches of the surface or the surface is inundated, and is expressed as a percentage of the growing season.
For this project, the growing season is defined by the Regional Supplement to the Corps of Engineers
Wetland Delineation Manual: Atlantic and Gulf Coastal Plain Region (Version 2.0) (USACE ERDC 2010) to
match the Natural Resources Conservation Services' (NRCS) WETS tables and is 282 days long in non -leap
years (28 February-6 December). For the purposes of this report, a hydroperiod for 6 percent or more of
the growing season is considered a wetland hydroperiod.
2.2 Rainfall and Drought
Rainfall was collected and measured using a RDS tipping bucket style rain gauge until 2019 when it became
obsolete; it was replaced with a Texas Electronic TR-525USW style bucket with similar function and
accuracy (+/- 1% at 0-2 inches/hour). Rainfall lands in the funnel of the rain gauge and is directed down
to the bottom of the funnel where it drips into two carefully calibrated "buckets" balanced on a pivot.
Once the bucket has reached its calibrated amount, 0.010 inch of rain, it tips down registering the event
as the opposite bucket rises to begin collecting the next calibrated amount of rain. Water is allowed to
drain out of a hole on either side of the rain gauge underneath each bucket. The Porter Creek rain gauge
was used for local rainfall data (Figure 3) except during a data gap or malfunction when the Aurora Station
6N data was used (located approximately 4.7 miles to the east). Since 2013, another rain gauge (located
3.3 miles to the northwest at DCUT19) may also serve during data gaps.
Long-term rainfall collected at the NOAA station PCS Aurora 6N was used by the Natural Resources
Conservation Service (NRCS) to provide what is known as the WETS Aurora Station 6N rainfall data. These
data were downloaded by CZR Incorporated (CZR) and used to build annual rainfall figures to determine
periods of normal rainfall. "Range of Normal" refers to the 30th and 70th percentile thresholds of the
probability of onsite rainfall amounts outside of the normal range (based on historical averages from
1971-2000). In December of 2016, the long-term historical averages were updated by NRCS to include
1981-2010.
Drought conditions are monitored nationally by several indexes. Periods of drought can affect the
hydrology of a site and should be taken into consideration when wetland hydrology is interpreted. As
suggested in the USACE 2010 Regional Supplement, the Palmer Drought Severity Index (PDSI) was used to
determine drought periods for the area. The PDSI is useful because it "takes into account not only
precipitation but also temperature, which affects evapotranspiration, and soil moisture conditions" (US
Army Corps of Engineers 2010). The PDSI is calculated monthly and is based on major climatic divisions
Bonnerton NRWHF Wetland Hydrology 2 PCS Phosphate Company, Inc.
2019 Update July 2020

within each state (US Army Corps of Engineers 2010). Although the index is not site -specific, for the
purposes of this report it provided sufficient information to make general statements about drought
conditions in the area. Drought conditions described by this index by month and year are for the NOAA
Central Coastal Plain region of North Carolina. The US Drought Monitor website
(http://droughtmonitor.unl.edu) provides a synthesis of multiple indices and impacts and reflects the
consensus of federal and academic scientists on regional conditions on a weekly basis (updated each
Thursday). The area used for regional drought conditions includes numerous watersheds of various sizes
and may cover portions of more than one county.
2.3 PCS Deep Well Pump Operations and Water Levels in CZR Level TROLLS
Water depth within creeks and wetlands should respond to changes in environmental conditions. For
example, precipitation events should increase the amount of belowground and aboveground water. The
operation of pumps within PCS deep wells located in the perimeter canal around the mine pit near impact
creeks could potentially disrupt how the hydrology of surrounding wetlands responds to any change in
environmental conditions. If the relationships between environmental variables and hydrology changes
during or after the operation of pumps within deep wells, then some effect of Mod Alt L activities may be
inferred.
Water level data collected by CZR from Level TROLLS in the Bonnerton non-riverine wet hardwood forest
help investigate these potential changes in relationships. Level TROLLS measure water levels across a
range of approximately 5 feet with most data collected from —24 to +24 inches at each location
(configuration/installation varies slightly by site conditions). Information on the operation of pumps
within each 20-inch diameter deep well was provided by PCS. Each deep well is drilled approximately
250-feet deep through several confining layers in order to depressurize the Castle Hayne Aquifer under
the active mine. Each pump can produce 3,000 gallons/minute.
Daily hydrology data from each Level TROLL was split into three time periods: pre-, during-, and post -
pump operation. For each of these time periods, a dynamic multiple linear regression model was
constructed with hydrology (i.e., water depth) as the response variable and Tar River discharge,
precipitation, wind speed, and wind direction as predictor variables. Tar River discharge was lagged by 1,
5, 10, 15, and 20 days and precipitation was lagged by 1, 2, 3, 4, and 5 days. Wind direction was converted
into a categorical variable to represent eight directions (north, northeast, east, etc.). Water depth was
also lagged one day and included in all models as another predictor variable; however, this variable was
only included to control for temporal autocorrelation and not for any explanatory purposes.
A full model with all of the predictor variables was first constructed. Predictor variables were removed in
a step -wise manner based on their significance value (i.e., P-value). However, a predictor was not
removed if it was the only representative remaining of the four main predictor types (wind speed, wind
direction, discharge, or precipitation). Thus, each final model included at least one predictor of wind
speed, wind direction, discharge, and precipitation. Final predictor variables were compared to one
another using the absolute values of the calculated t-value. Those variables with the highest t-values for
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2019 Update July 2020

each final model are referred to as 'important' to distinguish from significant or non -significant variables
that did not produce high t-values. Models were fit using the dynlm package in R (Zeileis 2016).
3.0 Results and Discussion
3.1 Soil Series and Soil Profiles
The soil survey for Beaufort County NC (Kirby 1995) and web soil survey data show the area of the
Bonnerton NRHWF as underlain mostly by Tomotley fine sandy loam and several other soil series which
are all considered hydric; two of the soil series are considered non-hydric (Altavista fine sandy loam and
Augusta fine sandy loam) (Figure 4). Since earlier well installation soil profiles were described by several
biologists at different times, in 2016/2017, soil profiles at all 20 well locations were re -described using the
NRCS hydric soil indicators (USDA2010) as directed bythe 2010 regional supplement (soil profiles included
in Appendix A).
3.2 Rainfall and Drought in 2015 - 2019
Monthly rainfall recorded in 2015-2019 at the Porter Creek rain gauge and at the PCS Aurora 6N station
is shown in Table 1.
In 2019, monthly rainfall totals for January, February, April, June, July, and November through December
were below the WETS 70th percentile (Figure 5); annual rainfall total at the Porter Creek rain gauge was
56.67 inches. Porter rain gauge monthly totals were highest for the year in August associated with heavy
downpours and was considerably different from nearby rain gauges. PCS Aurora 6N rain gauge recorded
its highest monthly total in September mostly due to Tropical Storm Dorian on the September 6th. The
differences in rain gauge rainfall totals within close proximity is typical, especially during summer months,
when localized strong storms are more common. Days of above normal rainfall (13 April through 9 May,
12 July through 20 July, 24 July through 11 August, and 28 August through 27 September) were excluded.
In 2018, monthly rainfall totals for January, February, and March were below the WETS 70th percentile
(Figure 6); the majority of the year was above the WETS normal range and annual rainfall total at the
Porter Creek gauge was 67.61 inches. The wettest tropical cyclone on record in the Carolinas, Hurricane
Florence (slow moving Category 1 storm), made landfall in Wrightsville Beach, NC on 14 September.
Rainfall was generally 4 to 8 inches over Beaufort County with a storm total of 6.95 inches in Belhaven.
The heaviest rainfall totals fell across the extreme southern part of the county which caused flash flooding
in some locations.
In 2017, monthly rainfall totals for January, February, October, and November were below the WETS 30th
percentile (Figure 7); annual rainfall total at the Porter Creek gauge was 48.09 inches. April was the only
month with total rainfall above the WETS normal range. A strong coastal low pressure system produced
heavy rainfall and flash flooding from 23 April to 25 April. Based on the 30-day rolling total, rainfall from
24 April through 24 May was considered above normal.
Bonnerton NRWHF Wetland Hydrology 4 PCS Phosphate Company, Inc.
2019 Update July 2020

In 2016, monthly rainfall was greater in February, June, July, September and October when compared to
the WETS percentiles (Figure 8); annual total rainfall at the Porter Creek gauge was 55.93 inches. Rainfall
for March and mid to late August were below normal with the remainder of the year within WETS normal
range. Hurricane Matthew, a Category 1 storm, made landfall in Cape Romain National Wildlife Refuge,
SC on 8 October 2016. Above average rainfall spikes began in the PCS area on 7 October, coincident with
arrival of the outer rain bands of the hurricane in North Carolina. There were several periods of above
normal rainfall that were excluded when hydroperiods were calculated for normal and below normal
rainfall: 3 February through 5 March, 3 June through 5 July, 7-30 July, 11-30 September, and 7 October
through 7 November.
In 2015, monthly rainfall was greater in June, October, and late November through late December when
compared to the WETS percentiles (Figure 9); annual total rainfall at the Porter Creek gauge was 58.96
inches. At the end of January and March, the 30-day rolling total was slightly above normal. Rainfall for
the month of August was below normal and the rainfall for the remainder of the year fell within the WETS
normal range. Periods of above normal rainfall included 3 June through 3 July, 2 October through 1
November, and 20 November through 20 December.
For 2019, the US Drought Monitor (http://droughtmonitor.unl.edu) indicated nine weeks were considered
abnormally dry (DO) the highest record since 2015; the remaining weeks had no drought status in the
vicinity of the Bonnerton Road NRHWF "135A" and "58A" project areas (Table 2; four years prior to 2015
are also shown). In 2018, one week was considered abnormally dry (DO). In 2017, five weeks were
considered abnormally dry (DO). During 2016, three weeks in April were assigned drought condition (DO
—Abnormally Dry) or 6 percent of the entire year and 7 percent of the 41-week growing season (Table 3).
In 2015, all 41 weeks of the growing season were considered normal with no drought status.
3.3 Wetland Hydrology by Year
2019
For 2019, all locations recorded wetland hydroperiods for 12.5 to 25.0 percent of the growing season
when periods of above normal rainfall were excluded (Table 3a). During all rainfall conditions two wells
had hydroperiods for >25.0-75.0 percent of the growing season while all the other wells remained in the
>12.5-25.0 percent range (Table 3b). Under all rainfall conditions, four wells changed from the >25.0-75.0
percent hydrologic zone to the >12.5-25.0 percent from 2018 to 2019.
2018
All BHW and PCW wells well locations recorded wetland hydroperiods in 2018, even when periods of
above normal were excluded (Tables 3a and 3b). Of the 14 BHW wells, eight wells had hydroperiods for
>12.5-25.0 percent and six wells had hydroperiods for >25-75 percent of the growing season during all
rainfall conditions. Similarly, all six PCW wells had hydroperiods for >12.5-25.0 percent.
When hydroperiods that occurred during above normal rainfall were removed (Figure 5), six wells
decreased from >25.0-75.0 percent to >12.5-25.0 percent of the growing season; all other wells
maintained hydroperiods for >12.5-25.0 percent of the growing season.
Bonnerton NRWHF Wetland Hydrology 5 PCS Phosphate Company, Inc.
2019 Update July 2020

2017
All well locations recorded wetland hydroperiods, even when periods of above normal were excluded
(Tables B-1a and 1b, Appendix B). Of the 14 BHW wells, eight wells had hydroperiods for >12.5-25.0
percent and six wells had hydroperiods for >25-75 percent of the growing season during all rainfall
conditions. Similarly, all six PCW wells had hydroperiods for >12.5-25.0 percent.
When hydroperiods that occurred during above normal rainfall were removed, six wells decreased from
>25.0-75.0 percent to >12.5-25.0 percent of the growing season; all other wells maintained hydroperiods
for >12.5-25.0 percent of the growing season.
2016
The first full monitoring year for the 14 BHW wells was 2016. All well locations recorded wetland
hydroperiods during the 2016 growing season (Tables B-1a and 1b, Appendix B). Of the 14 BHW wells,
hydroperiods for eight wells were >12.5-25.0 percent and six wells were >25.0-75.0 percent of the growing
season. Similarly, all six PCW wells had hydroperiods for >12.5-25.0 percent.
When above normal rainfall was removed (Figure 6), only one well (PCW1) decreased from >12.5-25.0
percent to >_6.0-12.5 percent of the growing season during normal and below normal rainfall conditions.
2015
The 14 Bonnerton wells (BHW) were installed at the end of June 2015 and beginning of July 2015; the six
upper Porter Creek (PC) wells collected data all year. All 14 BHW wells exhibited wetland hydroperiods
using all rainfall data between June and December and the six Porter Creek wells exhibited wetland
hydroperiods between February and December (Tables B-1a and 1b, Appendix B). Among the 14 wells in
the higher elevations of the hardwood flat, BHW6 had the longest hydroperiod of 23.8 percent of the
growing season while longest hydroperiods at the remaining wells were in the range of >_6.0 - 12.5 percent
of the growing season (Table 4b). The six wells in upper Porter Creek are located in somewhat lower
elevations than some of the other 14 wells and using all 2015 rainfall data, longest hydroperiods were
>12.5-25.0 percent of the growing season with PCW6 exhibiting the longest hydroperiod of 24.5 percent
(Appendix B).
When dates with above normal rainfall during 2015 (Figure 7) were removed and only normal and below
normal rainfall periods are used for evaluation, three BHW wells did not exhibit any wetland hydroperiods
between June and December (one of these four exhibited water within 12 inches of the surface but for
less than 6 percent of the growing season), nine had longest hydroperiods in the range of >_6.0- 12.5
percent, and longest hydroperiod at one well was >12.5-25.0 percent (Table 4a). All six PCW wells had
wetland hydroperiods in the range of >12.5-25.0 percent of the growing season during normal and below
normal rainfall.
Bonnerton NRWHF Wetland Hydrology 6 PCS Phosphate Company, Inc.
2019 Update July 2020

3.4 Mine Perimeter Deep Well Pump Operation and Near Surface Hydrology
At agency request, PCS provided CZR information about the locations and dates of operation (turn -ON
and turn -OFF dates) of pumps in deep wells around the Bonnerton Mod Alt L mine perimeter for analysis
of potential effects on adjacent wetland hydrology attributed to the pump activity. As of 31 December
2018, three deep well pumps in the vicinity of the Level TROLLS had been in operation since 2017, turned
off in 2018, and suitable for the analysis. Graphs of the water levels of the 14 adjacent wetland wells in
the Bonnerton NRWHF were examined in late 2017 through December 2019. The graphs do not reveal
any apparent change in water level in the last weeks of 2017 through December 2019 other than response
to rainfall events. These graphs are shown in Figure 11 of this report.
Operation dates for the pumps in the PCS deep wells in the Bonnerton Tract as of the end of 2019 are
shown in Table 5. This 2019 Bonnerton NRWHF update is the second report to incorporate an analysis on
deep well pump operations and the wetland hydrology in the non-riverine wet hardwood forest.
Three deep wells in close proximity to the eastern side of the Bonnerton non-riverine wet hardwood forest
were used for the analysis (Figure 10). The pump in deep well 1108 was in operation from October 2017
to August 2018, pump in deep well 1109 was in operation from February 2017 to May 2018, and the pump
in deep well 1110 was in operation from February 2017 to October 2018; the 2019 analysis focused on
the on/off dates for pumps in these deep wells. The hydrology at four Level TROLLS was examined from
July 2015 forward and those graphs are shown in Figure 11. The Pre time period was set from July 2015
when Level TROLLS were installed through January 2017, the During time period was set from February
2017 through October 2018, and the Post time period was set from November 2018 through December
2019.
Detailed results of all final models are given in Table 6. For all four Level TROLLS rainfall was the important
predictor variable for all three periods and had positive coefficients; the greatest influence was from
rainfall the day of (0 days) for Pre/During/Post except for BHW1 which had a greater influence for a 1 day
lag for During. However, the difference between the influences of rainfall was almost indiscernible
between 0 and 1 day. Wind direction and wind speed were positively significant in BHW1, BHW3, and
BHW4 for Post operation, as well as direction for each Level TROLL in at least one period. Northern winds
increased depth at BHW2 and BHW4 during Pre, while southern winds increased depth at each Level
TROLL for During and west winds decreased depth at all Level TROLLS During except BHW1. Southeastern
winds increased depths at BHW1 and BHW4, while eastern winds increased depth at BHW2 during Post.
Northwestern winds decreased depth at BHW1, BHW2, and BHW4 during Post.
Discharge was only a significant predictor for BHW1 Pre and BHW2 Post, but was never an important
variable for any Level TROLL.
4.0 Summary
During 2015-2019 monitoring years, all 20 ground water monitoring wells exhibited wetland hydroperiods
when all rainfall data are used to tabulate consecutive number of days of water levels above -12.0 inches
Bonnerton NRWHF Wetland Hydrology 7 PCS Phosphate Company, Inc.
2019 Update July 2020

(relative to ground surface) as shown in Table 4a. The 14 Bonnerton wells were not installed until June of
2015; therefore, the earliest hydroperiods and perhaps the longest hydroperiods were not recorded for
that year. In 2016-2019 all BHW and PCW wells exhibited wetland hydroperiods, even when above
average rainfall was excluded (Table 4a). Over these four complete years, longest hydroperiods during
WETS normal thresholds or below for 19 of the 20 wells were all >14.8 percent; the longest hydroperiod
for the other well was 12.4 percent in 2016 and >_15.6 percent for the other three years (Table 4a). At first
glance, 2018 and 2019 longest hydroperiods appear to have less variability and be shorter than previous
years; however, 64 percent of the 2018 growing season had rainfall periods above the 70' percentile and
were not included in the tally (Table 4a). The lower percentage hydroperiods for 2019 could be attributed
to the drier year with 17 percent of the year in an abnormally dry drought category (Table 2).
While the amount of annual rainfall, the months in which more or less rainfall occurs, and the percent of
weeks with drought status varies from year to year, the wetland hydrology in the Bonnerton non-riverine
wet hardwood forest over the five years appeared to be relatively consistent when all hydroperiods were
shown (Table 4b); the wettest well (BHW6) remained the wettest and the driest well (PC1) remained the
driest.
Rainfall was the most important predictor for every Level TROLL and deep well pump operation time
period in Bonnerton. It is clear that rainfall positively impacted the hydrology, after controlling for
discharge and wind. Furthermore, this positive effect was present before, during, and even after deep
well pump operation for all Bonnerton Level TROLLS. Thus, the operation of pumps in deep wells does not
appear to have affected the positive influence of rainfall on hydrology in Bonnerton.
All four wells analyzed showed a 0-1 day lag for rainfall as an important predictor variable during the Pre,
During, and Post time periods. This result suggests that the amount of time for a rainfall event to strongly
affect the water levels measured by the Level TROLLS has remained relatively the same since pumps first
began operation.
The pump operation in deep wells does not seem to have had any major impacts on the hydrologic
response of Bonnerton shallow surface water to changes to the external environment (as measured by
the Level TROLLS). Regression models constructed before, during, and after pump operation in the deep
wells were similar (but not identical).
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2019 Update July 2020

5.0 Literature Cited
Kirby, Robert M. 1995. Soil Survey of Beaufort County, North Carolina. Natural Resources Conservation
Service, United States Department of Agriculture.
Soil Survey Staff. Undated. Natural Resources Conservation Service, United States Department of
Agriculture. Web Soil Survey. Available online at http://websoilsurvey.nres.usda.gov/. Accessed
[09/10/2012].
US Army Corps of Engineers. 2010. Regional supplement to the Corps of Engineers wetland delineation
manual: Atlantic and Gulf coastal plain region. Version 2. J.S Wakeley, R.W. Lichvar, and C.V.
Noble, eds. ERDC/EL TR-10-20, Vicksburg, MS.
US Department of Agriculture, Natural Resources Conservation Service. 2010. Field Indicators of Hydric
Soils in the United States, Version 7.0. L.M. Vasilas, G.W. Hurt, and C.V Noble (eds.) USDA, NRCS,
in cooperation with the National Technical Committee for Hydric Soils.
Zeileis, A (2016) dynlm: Dynamic Linear Regression. R package version 0.3-5. URL http://CRAN.R-
pro0ect.org/package=dynIm
Bonnerton NRWHF Wetland Hydrology 9 PCS Phosphate Company, Inc.
2019 Update July 2020

nv
'0!pp
R; T
ow-
- 6L
SOURCE:
AERIALS PROVIDED BY: PCS PHOSPHATE COMPANY. INC.
1530 NC HIGHWAY 306 SOUTH, AURORA, NORTH
CAROLINA 27606, 252-322-5121. DATE. JANUARY 7• 2020
(k
1,000 0
. LEGEND
r.
MODIFIED ALT L PERMIT BOUNDARY
�• NON-RIVERINE WET HARDWOOD FOREST
AREAS 135A AND 58A AVOIDED BY
PERMITTED MOD ALT L MINE BOUNDARY
Bonnerton
Non—Riverine Wet Hardwood Forest
Areas Avoided by Mod Alt L
PCS PHOSPHATE MINE CONTINUATION
Scale: As shown Drawn by: TLJ
1,000 Feet F lie. lliyly/dUNHL`iIUN HKWHF MVN ZU1'jl
T5 Date: 07/06/20 B0NRTN_0RWHF_IERIAL_2019RPT
Approved by: Figure 2

35A
11
c i
L�l . r.•s� : r�'14
SOURCE:
AERL4 3 PROVIDED DY: PCS PHOSPHATE COMPANY, INC-
1530 NC HIGHWAY 306 SOUTH, AURORA, NORTH
CAROLINA 27806, 252-322-5121, DATE' JANUARY 7, 2020
LEGEND
MODIFIED ALT L. PERMIT BOUNDARY
's. NON-RIVERINE WET HARDWOOD FOREST
AREAS 13 5A AND 58A AVOIDED BY
PERMITTED MOD ALT L MINE BOUNDARY
■ SEMI -CONTINUOUS MONITORING WELL
RAIN GAUGE
Bonnorton NRWHF
Hydrology Monitoring Sites
PCS PHOSPHATE MINE CONTINUATION
Scale: As shown Drawn by: TLJ
1,200 0 1,200 Feet T I ; 174579/90HNERTON NRWHF MON 2019/
Dote: 0 7 0 6/ 2 0 Fe —.
APT
Approved by: Figure 3

r
SOURCE:
AERIALS PROVIDED BY; PCS PHOSPHATE COMPANY, INC.
1530 INC HIGHWAY 306 SOUTH, AURORA, NORTH
CAROLINA 27805, 252-322-5121 , DATE: JANUARY 7, 2020
SOIL SURVEY OF BEAUFORT COUNTY, NORTH CAROLINA, US DEPARTMENT
OF AGRICULTURE NATURAL RESOURCES CONVERSATION SERVICE,
ISSUED; SEPTEMBER 1995
41-.
LEGEND
MODIFIED ALT L PERMIT BOUNDARY
NON-RIVERINE WET HARDWOOD FOREST
1-7 AREAS 135A AND 58A AVOIDED BY
PERMITTED MOD ALT L MINE BOUNDARY
SOILS
SYMBOL
SOIL NAME
AoA
ALTAVISTA FINE SANDY LOAM
At
AUGUSTA FINE SANDY LOAM
_.
.7
CAPE FEAR FINE SANDY LOAM
�L't
.,
I P.
LEAF SILT LOAM
Lo
LEON SAND
Me
MUCKALEE LOAM
pe
PERQUIMANS SILT LOAM
Pt
PORTSMOUTH LOAM
Ro
ROANOKE FINE SANDY LOAM
Sb
SEABROOK LOAMY SAND
Tog
TARBORO SAND
To
TOMOTLEY FINE SANDY LOAM
W
WATER
•
r
BONNLRTON NRWHF
SOILS
PCS PHOSPHATE MINE CONTINUATION
Scale: As
shown Drawn by: TLJ
1,000 0
1,000 Feet
I B: 174579%60NNER ON NRWHF MON 2019r
Date: 0 7 /0 6 /2 0
©DNTRN-NRWI if-SOILS-2019W T
Approved
by: Figure 4

16
14
s 12
U
C
10
T
s 8
c
0
6
T
0
4
2
0
O
Off',
NOTES: "Range of Normal" and "Aurora Monthly Rainfall Total" plotted on last day of
each month.
"Range of Normal" refers to the 30th and 70th percentile thresholds of the probability
of onsite rainfall amounts outside of the normal range (based on historical averages
from 1981-2010). WETS Data subject to periodic revision. Data shown are latest
available from http://agacis.rcc-acis.org/?fips=37013
"Aurora Monthly Rainfall Total" refers to monthly totals from the PCS-Aurora 6 N
NOAA Station.
•
ti0 ti0 ti� ti0
1111111111111111111111111112019 Porter Daily Rainfall
—2019 WETS 30-yr 30% less chance
•
•
ti0 ti0 ti0 ti0
'S s
O� Oti O�Q O
— Porter 30-day Rolling Total
—� 2019 WETS 30-yr 30% more chance
ti0 ti0 ti0
0 ec
• 2019 Aurora Monthly Rainfall Total
2019 Porter Monthly Rainfall
Figure 5. 2019 Porter rainfall vs. WETS -Aurora rainfall. Above normal rainfall: 4/13-5/9; 7/12-7/20; 7/24-8/11; 8/28-
9/27.

16
14
s 12
U
C
10
T
s 8
c
0
6
T
0
4
2
0
Off',
NOTES: "Range of Normal" and "Aurora Monthly Rainfall Total" plotted on last day of each month.
"Range of Normal" refers to the 30th and 70th percentile thresholds of the probability of onsite rainfall amounts outside of the normal range
(based on historical averages from 1981-2010). WETS Data subject to periodic revision. Data shown are latest available from http://agacis.rcc-
acis.org/?fips=37013
"Aurora Monthly Rainfall Total" refers to monthly totals from the PCS-Aurora 6 N NOAA Station.
db
•
•
ti0
111111111111111111111111112018 Porter Daily Rainfall
-2018 WETS 30-yr 30% less chance
• 0
•
tiIb
Off' Oti O�,Q, O
-Porter 30-day Rolling Total
-2018 WETS 30-yr 30% more chance
•
•
ti0 ti00
04 ec
• 2018 Aurora Monthly Rainfall Total
2018 Porter Monthly Rainfall
Figure 6. 2018 Porter rainfall vs. WETS -Aurora rainfall. Above normal rainfall: 4/15-5/16, 5/19-7/17, 7/28-8/23, 9/14-
10/14, 11/5-12/5.

12
10
2
04
Off',
NOTES: "Range of Normal" and "Aurora Monthly Rainfall Total" plotted on last day of each month.
"Range of Normal" refers to the 30th and 70th percentile thresholds of the probability of onsite rainfall amounts outside of the normal range
(based on historical averages from 1981-2010). WETS Data subject to periodic revision. Data shown are latest available from http://agacis.rcc-
acis.org/?fips=37013
"Aurora Monthly Rainfall Total" refers to monthly totals from the PCS-Aurora 6 N NOAA Station.
tiA ti tiA
111111111111111111111111112017 Porter Daily Rainfall
—2017 WETS 30-yr 30% less chance
ti� ti� ti� ti�
Off; Off' O�,P O
—Porter 30-day Rolling Total
—2017 WETS 30-yr 30% more chance
ti� ti� ti�
0 ec
• 2017 Aurora Monthly Rainfall Total
2017 Porter Monthly Rainfall
Figure 7. 2017 Porter rainfall vs. WETS -Aurora rainfall. Above normal rainfall: 4/26-5/23.

14 T
12 A
10
4
2
04
Off',
NOTES: Durham Creek DCUT19 rainfall data was used in place of Porter Creek rainfall data on 1
January through 15 September 2016 due to equipment malfunctions.
"Range of Normal" and "Aurora Monthly Rainfall Total" plotted on last day of each month.
"Range of Normal" refers to the 30th and 70th percentile thresholds of the probability of onsite rainfall
amounts outside of the normal range (based on historical averages from 1981-2010). WETS Data
subject to periodic revision. Data shown are latest available from http://agacis.rcc-acis.org/?fips=37013
"Aurora Monthly Rainfall Total" refers to monthly totals from the PCS-Aurora 6 N NOAA Station.
•
ti(0
1111111111111111111111111112016 Porter Daily Rainfall
-2016 WETS 30-yr 30% less chance
4
ti� ti� ti�
SS O�
Q) Oti OyP
-Porter 30-day Rolling Total
-Monthly Rainfall Total
Figure 8. 2016 Porter Rainfall and WETS -Aurora Rainfall
•
•
hJ LL.
ti(0
Oti Off' p�'� O O
• 2016 Aurora Monthly Rainfall Total
2016 Porter Monthly Rainfall

16
14
12
10
T
s
c 8
0
c
6
0
4
2
0
NOTES: PCS Aurora rainfall data was used in place of Porter Creek rainfall data on 11 July through 14 October 2015 and 10 November through
31 December 2015 due to equipment malfunctions.
"Range of Normal" and "Aurora Monthly Rainfall Total" plotted on last day of each month.
"Range of Normal" refers to the 30th and 70th percentile thresholds of the probability of onsite rainfall amounts outside of the normal range
(based on historical averages from 1971-2000). WETS Data subject to periodic revision. Data shown are latest available from
http://www.wcc.nres.usda.gov/climate/navigate_wets.htm
"Aurora Monthly Rainfall Total" refers to monthly totals from the PCS-Aurora 6 N NOAA Station.
•
•
•
tih tih tih tih tih
,ate Few fat P�� aJ
Off' p`y Q'y pti �'y�
�2015 Porter Daily Rainfall
-2015 WETS 30-yr 30% less chance
tih tih tih
s J�O
off' oti o�,P
- Porter 30-day Rolling Total
Monthly Rainfall Total
Figure 9. 2015 PORTER RAINFALL and WETS -AURORA RAINFALL
tih tih tih tih
0 ec
• 2015 Aurora Monthly Rainfall Total
2015 Porter Monthly Rainfall

35A. Ak&
.......... ........
4
' r X � a
r:IN GAS �.,`�; {�' - F; •`
_jm
SOURCE:
AFRIAIS PROVIDFD BY: PCS PH09PHATF COMPANY, INC.
1530 NC HIGHWAY 306 SOUTH, AURORA, NORTH
CAROLINA 27806, 252-322-5121 , DATE: JANUARY 7, 2020
LEGEND
MODIFIED ALT L PERMIT BOUNDARY
�r
i.
.'r NON-RIVERINE WET HARDWOOD FOREST
AREAS 135A AND 58A AVOIDED BY
PERMITTED MOD ALT L MINE BOUNDARY
r
SEMI -CONTINUOUS MONITORING WELL
RAIN GAUGE
-- `'"r DEEP WELL (USED IN ANALYSIS)
DEEP WELL (OFF NOT USED IN ANALYSIS)
DEEP WELL (STILL ON)
DEEP WELL (DRILLED HU I NU I ON IN 201 9)
1,200 0 1 ,200 Feet
4_ F
Bonnerton NRWHF
Hydrology Monitoring Sites and
Deep Well Locations
PCS PHOSPHATE MINE CONTINUATION
Scale: As shown Drawn by: TLJ
e. 174579/BONNERTON NRINHF MON 2019j
Date: 07 06/20 OWRN-NRWHF-MCtA-DEEPWELL2019RPT
Approved by: Figure 10

30
20
-20
-30
11
30
20
-20
-30
D W 1108
Bi was instal l ad 25June 2015 DW1109
D W 1110
D W 1111
D W 1112
D W 1113
D W 1114
D W 1115
D W 1116
D W 1117 —
D W 1118
D W 1119 —
D W 1120
2016
2017 2018
Year
D W 1108
BHW3 was installed 25 June 2015 DW1109
D W 1110
DWllll
D W 1112
D W 1113
D W 1114
D W 1115
D W 1116
D W 1117
D W 1118
D W 1119
D W 1120
2016
2017 2018
Year
2019
2019
BHW1
BHW3
30
20
-20
-30
1.
30
20
D W 1108
BHW2 was installed 25June 2015 DW1109
D W 1110
DWllll
DW1112
DW1113
DW1114
DW1115
D W 1116
D W 1117
D W 1118
D W 1119
D W 1120
2016 2017 2018 2019
Year
D W 1108
BHW4was installed 18June2015 DW1109
D W 1110
D W 1111
D W 1112
D W 1113
D W 1114
D W 1115
D W 1116
D W 1117
D W 1118
D W 1119
D W 1120
2016 2017 2018 2019
Year
BHW2
BHW4
Figure 11. 2015 — 2019 hydrology during deep well pump operations. Fourteen Level TROLLS were in proximity to the deep wells during the time the pump was in operation; horizontal bars at top right of graphs depict the period of pump
operation.
Bonnerton NRWHF Wetland Hydrology F-11 PCS Phosphate Company, Inc.
2019 Update July 2020

30
20
N
N
� 10
U
L
a 0
w
0
`w
3 -10
-20
-30
30
20
d
A -10
-20
-30
DW 1108
BHW5 was installed 30 June 2015 DW1109
D W 1110
DWllll
D W 1112
D W 1113
D W 1114
D W 1115
D W 1116
D W 1117
D W 1118
D W 1119
D W 1120
BHW5
2016 2017 2018 2019
DW 1108
BHW7was installed 1 July 2015 DW1109
DW 1110
DW 1111
DW 1112
DW 1113
DW 1114
DW 1115
DW 1116
DW 1117
DW 1118
DW 1119
DW 1120
D W 1121
D W 1122
DW1123
I J 1. 1 . ...�. .�. I � , L. 1 DW1124
2016 2017 2018 2019
BHW7
30
20
35
25
15
N
N
L
U 5
C
a -5
w
0
-15
-25
-35
45
D W 1108
BHW6 was installed 1 July 2015 DW1109
D W 1110
DWllll
D W 1112
D W 1113
D W 1114
D W 1115
D W 1116
D W 1117
D W 1118
D W 1119
D W 1120
D W 1121 —
D W 1122
DW1123
DW1124
BHW6
2016 2017 2018 2019
BHW8 was installed 1 July 2015 DW1108
DW1109
DW1110
DWllll
DW1112
DW1113
DW1114
DW 1115
DW 1116
DW 1117
DW 1118 DW1119
DW1120
DW1121
DW1122
iII ... I I DW1123
u A I .1 I ...IJ....I I — ..... DW1124
2016 2017 2018 2019
BHW8
Figure 11 (continued). 2015 — 2019 hydrology during deep well pump operations. Fourteen Level TROLLS were in proximity to the deep wells during the time the pump was in operation; horizontal bars at top right of graphs depict the period
of pump operation.
Bonnerton NRWHF Wetland Hydrology F-11 PCS Phosphate Company, Inc.
2019 Update July 2020

30
20
30
20
-20
-30
D W 1108
BHW9 was installed 30 June 2015 DW1109
D W 1110
DWllll
DW1112
DW1113
D W 1114
DW 1115
D W 1116
D W 1117
D W 1118
D W 1119
D W 1120
2016
2017
2018
2019
BHW9
DW1108
BHW11 was installed 18 June 2015
DW1109
D W 1110
DWllll
DW1112
DW1113
DW1114
D W 1115
D W 1116
D W 1117
D W 1118
D W 1119
D W 1120
D W 1121
D W 1122
�,iy DW112DW1124
2016
2017
2018
2019
BHW11
30
20
-20
-30
30
20
-20
-30
D W 1108
BHW10was installed 30 June 2015 DW1109
DW1110
DWllll
DW1112
DW1113
D W 1114
D W 1115
D W 1116
D W 1117
D W 1118
DW1119
D W 1120
D W 1121
D W 1122
D W 1123
D W 1124
BHW10
2016 2017 2018 2019
D W 1108
BHW12 was installed 30 June 2015 DW1109
D W 1110
DWllll
DW1112
DW1113
D W 1114
D W 1115
D W 1116
D W 1117
D W 1118
D W 1119
D W 1120
D W 1121
D W 1122
D W 1123
1 L DW1124
2016 2017 2018 2019
BHW12
Figure 11 (continued). 2015 — 2019 hydrology during deep well pump operations. Fourteen Level TROLLS were in proximity to the deep wells during the time the pump was in operation; horizontal bars at top right of graphs depict the period
of pump operation.
Bonnerton NRWHF Wetland Hydrology F-11 PCS Phosphate Company, Inc.
2019 Update July 2020

D W 1108
50
BHW13 was installed 30 June 2015
DW1109
D W 1110
DWllll
40
DW1112
DW1113
DW1114
30
DW1115
D W 1116
D W 1117
20
D W 1118
D W 1119
D W 1120
y
D W 1121
t
10
DW1122
c�
c
D W 1123
t
D W 1124
a
0
a
0
`w
-10
-20
-30
-40
BHW13
-50
2015 2016
2017
2018
2019
D W 1108
50
8HW14was installed 18 June 2015
DW1109
D W 1110
DWllll
40
DW1112
DW1113
D W 1114
30
DW1115
D W 1116
D W 1117
20
D W 1118
D W 1119
D W 1120
y
D W 1121
t
10
DW1122
c�
c
D W 1123
t
D W 1124
a
0
a
0
`w
-10
20
-30
-40
BHW14
-50
2015 2016
2017
2018
2019
Figure 11 (concluded). 2015 — 2019 hydrology during deep well pump operations. Fourteen Level TROLLS were in proximity to the deep wells during the time the pump was in operation; horizontal bars at top right of graphs depict the period
of pump operation.
Bonnerton NRWHF Wetland Hydrology F-11 PCS Phosphate Company, Inc.
2019 Update July 2020

Table 1. Monthly and annual rainfall for 2019, 2018, 2017, 2016, and 2015 recorded at the Porter Creek rain gauge and at the PCs Aurora 6N station.
MONTH
2O19RAINFALL (INCHES)
2018 RAINFALL (INCHES)
2017 RAINFALL (INCHES)
2016 RAINFALL (INCHES)
2015 RAINFALL (INCHES)
Porter Creek
PCs Aurora 6N
Porter Creek
PCs Aurora 6N
Porter Creek
PCs Aurora 6N
Porter Creek
PCs Aurora 6N
Porter Creek
PCs Aurora 6N
January
3.56
4.13
4.55
4.82
3.96
2.68
2.93
3.77
3.95
4.29
February
3.93
4.06
1.36
0.96
1.35
1.33
5.83
6.80
4.43
4.88
March
2.88
2.17
4.92
5.06
4.71
3.90
3.20
4.39
3.46
3.53
April
5.24
5.21
5.82
5.41
5.45
4.72
1.79
2.29
2.50
2.92
May
2.02
1.58
8.75
6.62
4.82
3.56
3.58
5.15
4.39
4.32
June
4.60
1.94
8.17
6.92
3.62
3.80
6.22
5.43
8.86
8.44
July
7.04
1.10
7.59
5.59
5.56
5.81
6.63
5.73
5.65
5.57
August
13.82
3.28
4.59
3.96
5.93
6.47
3.79
4.00
2.74
2.74
September
4.80
10.63
8.11
7.30
5.24
3.77
8.27
9.49
6.61
6.61
October
2.64
2.88
1.84
2.41
2.82
1.23
9.20
8.11
5.70
5.96
November
3.28
3.30
4.83
6.20
1.43
1.42
0.99
1.05
5.63
8.72
December
2.86
2.01
7.08
6.78
4.01
2.52
3.50
3.71
5.04
5.04
TOTAL
56.67
42.29
67.61
62.03
48.09
41.21
55.93
59.92
58.96
63.02
Table 2. Drought conditions for the south side of Pamlico River in the vicinity of South Creek forthe years
2012-2019. The drought conditions for each week were provided by the US Drought Monitor.
No drought
Abnormally
Moderately
Severe
Extreme
Exceptional
Percent of weeks
Year
status
dry (DO)
dry (DI)
drought
drought
drought
with a drought
(D2)
(D3)
(D4)
classification
2012
28
4
20
0
0
0
46
2013
39
13
0
0
0
0
25
2014
45
7
0
0
0
0
0
0
0
0
13
0
2015
52
0
2016
49
3
0
0
0
0
6
2017
47
5
0
0
0
0
10
2018
51
1
0
0
0
0
2
2019
43
9
0
0
0
0
17
Bonnerton NRWHF Wetland Hydrology
2019 Update
T-1
PCS Phosphate Company, Inc.
July 2020

Table 3a. Hydroperiods for monitoring wells in and near Bonnerton NRWHF areas and upper Porter Creek during WETS normal and below
normal rainfall (excludes above normal rainfall from 13 April - 9 May, 12 July - 20 July, 24 July - 11 August, 28 August - 27 September.) in 2019.
Rainfall from NOAA station Aurora 6N used for long-term percentiles and to determine periods of normal rainfall. Hydroperiods of 14
consecutive days or more are listed by dates, and any hydroperiods shorter than 14 days are included in the cumulative days.
Days where
Cumulative days
where water
Consecutive
days where
Percent of longest
Hydrologic zone
water table is -
Well
table is -12" or
water table is -
Dates
hydroperiod of 282-day
12" or above 1-
<6.0 >6.0-12.5% >12.5-25.0% >25.0-75.0%
27 Feb
above 28 Feb-6
12" or above 28
growing season
Dec
Feb-6 Dec
B HW 1
27
44
44
2/28-4/12
15.6
X
BHW2
27
44
44
2/28-4/12
15.6
X
BHW3
27
44
44
2/28-4/12
15.6
X
BHW4
................ ................
27
...................................................
44
...................................................
44
...................................................
2/28-4/12
............................................................................................
15.6
.......................................................................
X
.................. ¢..................................... ..................................... ......................................
BHW5
27
44
44
2/28-4/12
15.6
X
BHW6
27
44
44
2/28-4/12
15.6
X
BHW7
...............................
27
..................................................
67
..................................................
44- 21
....................... ...........................
2/28-4/12; 11/16-12/6
.......................................... .................................................
15.6
.......................................................................
X
................... :...................................... ...................................... .......................................
BHW8
27
50
44
2/28-4/12
15.6
X
BHW9
27
44
44
2/28-4/12
15.6
X
BHW10
27
44
44
HH2E/284E/12
15.6
X
B HW 11
27
44
44
15.6
X
BHW12
.............. ..................
27
...................................................
44
...................................................
44
...................................................
2/28-4/12
............................................................................................
15.6
.......................................................................
X
.................. ¢..................................... ..................................... ......................................
BHW13
27
44
44
2/28-4/12
15.6
X
BHW14
27
44
44
2/28-4/12
15.6
X
PC1
..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
27
44
44
2/28-4/12
15.6
X
PC2
27
44
44
2/28-4/12
15.6
X
PC3
27
44
44
2/28-4/12
15.6
X
PC4
27
44
44
2/28-4/12
15.6
X
PC5
27
44
44
2/28-4/12
15.6
X
PC6
27
44
44
2/28-4/12
15.6
X
Bonnerton NRWHF Wetland Hydrology T-2 PCS Phosphate Company, Inc.
2019 Update July 2020

Table 3b. Hydroperiods for monitoring wells in and near Bonnerton NRWHF areas and upper Porter Creek independent of WETS thresholds in
2019. Rainfall from NOAA station Aurora 6N used for long-term percentiles and to determine periods of normal rainfall. Hydroperiods of 14
consecutive days or more are listed by dates, and any hydroperiods shorter than 14 days are included in the cumulative days.
Days where water
Cumulative days
Consecutive days
Percent of longest
Hydrologic zone
where water table
where water table is -
hydroperiod of
Well
table is -12" or
is -12" or above 28
12" or above 28 Feb-6
Dates
282-day growing
<6.0 >6.0-12.5% >12.5-25.0% >25.0-75.0%
above 1-27 Feb
Feb-6 Dec
Dec
season
BHW1
........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
27
59
59
2/28�/27
20.9
X
BHW2
27
60
60
2/28-4/28
21.3
X
BHW3
27
60jj7j1jj
60
2/28-4/28
21.3
X
BHW4
27
600
2/28-4/28
21.3
X......................................
BHW5
27
730
2/28-5/8
24.8
X
BHW6
27
781
2/28-5/9
25.2
X
1;
21
.......................................................................................................................................................................................................................................................................................................................................................................................................................
2/28-5/8; 11/16-12/6
24.8
X
BHW8
27
814
2/28-5/2
22.7
X
BHW9
27
62
62
2/28-4/30
22.0
X
BHW10
27
63
63
2/28-5/1
22.3
X......................................
BHW11
27
71
71
2/28-5/9
25.2
X
BHW12
27
60
60
2/28-4/28
21.3
X
BHW13
........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
27
63
63
2/28-5/1
22.3
X
BHW14
27
61
61
2/28�/29
21.6
X
PC1
27
56
56
2/28-4/24
19.9
X
PC2
................................................................................................................................................................................................................................................................................................................................................................................................................................................................
27
59
59
2/28�/27
20.9
X'
PC3
27
56
56
2/28-4/24
19.9
X
PC4
27
59
59
2/28-4/27
20.9
X
PCs
27
60
60
2/28-4/28
21.3
X
Bonnerton NRWHF Wetland Hydrology T-3 PCS Phosphate Company, Inc.
2019 Update July 2020

Table 4a. Summary of hydroperiods for monitoring wells in and near Bonnerton NRWHF areas and
upper Porter Creek during WETS normal or below normal rainfall from 2015 through 2019. Rainfall
from NCAA station Aurora 6N used for long-term percentiles and to determine periods of normal
rainfall. (WH=wetland hydroperiod).
Note: The longest hydroperiod at each well is depicted as a percentage of the 282-day (or 283-day for
leap years) growing season when the water table was recorded as -12" or above. Also shown are total
annual rainfall in inches and the percentage of weeks with a drought status of DO classification
(abnormally dry) or drier in a year.
Well
2015*
2016
2017
2018
2019
# of Years
With WH
% of Years
with WH for
All Years
BHW1
0.0
15.5
17.0
16.0
15.6
4
80
BHW2
0.0
16.3
18.8
16.3
15.6
4
80
BHW3
6.0
15.9
17.0
16.3
15.6
5
100
BHW4
0.0
15.9
17.0
16.3
15.6
4
80
BHW5
6.4
28.3
19.5
16.3
15.6
5
100
BHW6
6.4
29.0
19.5
16.3
15.6
5
100
BHW7
6.4
28.3
19.5
16.3
15.6
5
100
BHW8
6.4
15.5
19.5
16.3
15.6
5
100
BHW9
5.7
28.3
19.5
16.3
15.6
4
80
BHW10
6.0
25.4
19.5
16.3
15.6
5
100
BHW11
6.4
29.0
19.5
16.3
15.6
5
100
BHW12
6.0
16.3
18.8
16.3
15.6
5
100
BHW13
6.0
18.0
19.5
16.3
15.6
5
100
BHW14
6.0
18.0
18.4
16.3
15.6
5
100
PC1
23.0
12.4
16.0
16.0
15.6
5
100
PC2
23.0
15.5
16.7
16.3
15.6
5
100
PC3
23.0
14.8
16.3
16.0
15.6
5
100
PC4
23.8
15.5
18.4
16.3
15.6
5
100
PC5
23.8
16.3
18.8
16.3
15.6
5
100
PC6
24.5
15.5
18.8
16.3
15.6
5
100
Porter Creek Annual
58.96
55.93
48.09
67.61a
56.67
-
-
Rainfall (in.)
Drought Weeks (%)
0
6
10
2
17
Bonnerton wells were installed in June/July 2015; hydroperiods for 2015 may have occurred prior to well installation.
a Rainfall in Porter Creek in 2018 was above the WETS 70th percentile for 181 days of the growing season (64.2 percent).
Fill colors represent: >6.0-12.5% > 12.5 - 25% >25 - 75% of the growng season.
Bonnerton NRWHF Wetland Hydrology T-4 PCS Phosphate Company, Inc.
2019 Update July 2020

Table 4b. Summary of hydroperiods for monitoring wells in and near Bonnerton NRWHF areas and
upper Porter Creek independent of WETS thresholds from 2015 through 2019. Rainfall from NOAA
station Aurora 6N used for long-term percentiles and to determine periods of normal rainfall.
(WH=wetland hydroperiod).
Note: The longest hydroperiod at each well is depicted as a percentage of the 282-day (or 283-day for
leap years) growing season when the water table was recorded as -12" or above. Also shown are total
annual rainfall in inches and the percentage of weeks with a drought status of DO (abnormally dry) or
drier in a year.
Well
2015"
2016
2017
2018
2019
# of Years
With WH
% of Years
with WH for
All Years
BHW1
6.1
18.4
17.0
22.0
20.9
5
100
BHW2
6.4
19.1
18.8
22.7
21.3
5
100
BHW3
12.1
18.8
17.0
22.7
21.3
5
100
BHW4
6.4
18.8
17.0
22.3
21.3
5
100
BHW5
12.4
30.7
28.4
26.2
24.8
5
100
BHW6
23.8
31.4
36.5
44.7
25.2
5
100
BHW7
12.4
30.7
36.5
27.7
24.8
5
100
BHW8
12.4
18.4
28.0
26.2
22.7
5
100
BHW9
11.7
30.7
28.0
26.2
22.0
5
100
BHW10
12.1
27.9
23.0
23.0
22.3
5
100
BHW11
12.4
31.4
28.7
27.3
25.2
5
100
BHW12
12.1
19.1
18.8
22.7
21.3
5
100
BHW13
12.1
20.8
23.0
23.4
22.3
5
100
BHW14
12.1
20.8
18.4
23.0
21.6
5
100
PC1
23.0
14.8
16.0
21.3
19.9
5
100
PC2
23.0
18.4
16.7
22.3
20.9
5
100
PC3
23.0
17.7
16.3
21.6
19.9
5
100
PC4
23.8
18.4
18.4
22.3
20.9
5
100
PC5
23.8
19.1
18.8
22.3
21.3
5
100
PC6
24.5
18.4
18.8
22.3
21.3
5
100
Porter Creek Annual
58.96
55.93
48.09
67.61
56.67
-
-
Rainfall (in.)
Drought Weeks (%)
0
6
10
2
17
Bonnerton wells were installed in June/July 2015; hydroperiods for 2015 may have occurred prior to well installation.
Fill colors represent: >6.0-12.5% > 12.5 - 25% of the growng season.
Bonnerton NRWHF Wetland Hydrology T-5 PCS Phosphate Company, Inc.
2019 Update July 2020

Table 5. Operation dates for the pumps within deep water wells surrounding the LevelTROLLs in
Bonnerton Hardwood Forest. Bold indicates earliest on date and latest off date of the deep well
pumps for each creek.
Deep Well Date Pump On Date Pump Off
DW1108*
October 2017
August 2018
DW1109
February 2017
May 2018
DW1110
February 2017
October 2018
*well turned back on November 2019 but only period shown used for During period in analysis
Bonnerton NRWHF Wetland Hydrology T-6 PCS Phosphate Company, Inc.
2019 Update July 2020

Table 6. Details of the final models for Level TROLLs in Bonnerton Hardwood Forest. Pre -before pump on; During -pump operation; Post -after
pumps off. DoF = degrees of freedom. Value of the coefficient and the standard error (in parentheses) are given for discharge, rainfall, and wind
speed; significant wind directions are categorized by positive (+) or negative (-). Bold = significance; number of asterisks = level of significance: * -
< 0.05, ** - < 0.01, *** - < 0.001. Red = variables with the highest t-values for each Level TROLL
LeveltrolU Period DoF
Discharge
Rainfall
Wind Speed
Wind Direction
RZ
BHW 1
10 days: -0.49 (0.17)**
0 days: 1.83 (0.26)***
(+) (NONE)
Pre 511
15 days: 0.43 (0.15)**
1 day: 1.20 (0.26)***
-0.004 (0.009)
(-): (NONE)
0.969
During600
0 days: -0.22 (0.15)
y
0 days: 2.66 (0.24)***
0.08 (0.04)
(+) S***
0.973
1 day: 2.79 (0.23)***
(NONE)
Post 370
10 days: -0.04 (0.03)
y
0 days: 0.17 (0.05)***
0.02 (0.01) *
+ : SE*
O
0.996
1 day: 0.12 (0.05)*
(-): NW*
am
0 days: 1.42 (0.27)***
(+):N*
Pre
532
10 days: -0.16 (0.12)
0.001 (0.01)
0.960
1 day: 1.30 (0.27)***
(NONE)
0 days: 2.95 (0.23)***
(+): S***
During
600
0 days: -0.14 (0.14)
0.04 (0.04)
0.974
1 day: 2.44 (0.22)***
O W*
(+)' E*
Post
399
10 days: -0.11 (0.05)*
0 days: 0.27 (0.07)***
0.05 (0.10)
0.998
NW*
BHW3
0 days: 1.35 (0.25)***
(+): (NONE)
Pre
542
0 days: 0.27 (0.14)
0.003 (0.01)
0.962
1 day: 0.89 (0.26)***
(_): (NONE)
During571
0 days: -0.24 (0.13)
y
0 days: 3.54 (0.23)***
0.05 (0.04)
(+) S**
0.975
1 day: 2.19 (0.23)***
(-): W*
(+) (NONE)
Post
399
0 days:-0.0003 (0.07)
0 days: 0.99 (0.11)***
0.08 (0.02)***
0.994
(NONE)
BHW4
0 days: 1.12 (0.25)***
(+): N*
Pre
533 10 days: -0.20 (0.10)
0.002 (0.01)
0.961
1 day: 1.02 (0.27)***
(_): (NONE)
0 days: 2.55 (0.23)***
(+): S***
During
513 0 days: 0.11 (0.21)
0.03 (0.04)
0.959
1 day: 1.96 (0.23)***
( ). W**
Post
0 days: 0.17 (0.05)***
399 0 days: -0.04 (0.03)
y
0.02 (0.01) *
+ : SE*
O 0.997
1 day: 0.12 (0.05)*
(-): NW*
Bonnerton NRWHF Wetland Hydrology T-7 PCS Phosphate Company, Inc.
2019 Update July 2020

APPENDIX A
Soil Profile Descriptions at Bonnerton NRWHF and Upper Porter
Creek Monitoring Wells

Appendix A Soil profiles at the 20 hydrology monitoring locations within and near the Bonnerton non-riverine wet hardwood forest that drains to upper
Porter Creek (58A and 135A polygons). The eight wells shown with an * are located within the 58A polygon; the six wells shown with ** are located within
the 135A polygon. Profiles described in December 2016 and March 2017.
Well
Depth
(inches)
Matrix
Redox Features
Texture
Remarks
Hydrologic Indicators
Color
%
Color
%
Typeal
Loc°
BHW1*
0-6
10 YR 3/2
100
Sandy Loam
Not Saturated
Depleted Matrix (F3)
6 - 14
10 YR 6/1
75
10 YR 6/8
25
C
M
Sandy Loam
Not Saturated
Depleted Dark Surface (A11)
14 - 28
10 YR 7/1
60
10 YR 6/8
40
C
M
Sandy Clay Loam
Not Saturated
6HW2*
0 - 7
10 YR 4/1
100
Sandy Loam
Not Saturated
7-15
10 YR 5/1
80
10 YR 5/8
20
C
M
Sandy Clay Loam
Not Saturated
Depleted Matrix (F3)
15 - 28
10 YR 5/1
70
10 YR 6/8
30
C
M
Sandy Clay
Not Saturated
BHW3*
0 - 3
10 YR 3/1
100
Sandy Loam
Not Saturated
Depleted Matrix (F3)
3 - 22
10 YR 5/1
85
10 YR 5/8
15
C
M
Sandy Loam
Not Saturated
Depleted Dark Surface (A11)
22 - 28
10 YR 6/1
70
10 YR 6/8
30
C
M
Sandy Clay Loam
Not Saturated
6HW4*
0 - 6
10 YR 3/2
100
Sandy Loam
Not Saturated
Depleted Matrix
6 - 17
10 YR 6/1
95
10 YR 6/8
5
C
M
Sandy Loam
Not Saturated
Depleted Dark Surfacece (A11)
17 - 28
10 YR 6/1
65
10 YR 6/8
35
C
M
Sandy Clay Loam
Not Saturated
PCW3*
0 - 8
10 YR 3/2
100
Sandy Loam
Not Saturated
Depleted Matrix
8 - 22
10 YR 5/1
95
10 YR 5/8
5
C
M
Sandy Loam
Not Saturated
Depleted Dark Surfaccee (A11)
22 - 28
10 YR 5/1
80
10 YR 5/8
20
C
M
Sandy Clay Loam
Not Saturated
PCW4*
0 - 4
10 YR 3/2
100
Sandy Clay Loam
Not Saturated
Depleted Matrix (F3)
4-30
10 YR 5/1
90
10 YR 5/8
10
C
M
Sandy Clay Loam
Not Saturated
Depleted Dark Matrix (A11)
PCW5*
0-5
10 YR 3/2
100
Sandy Clay Loam
Saturated
Depleted Matrix (F3)
5-11
10 YR 5/2
90
10 YR 5/6
10
C
M
Sandy Clay Loam
Saturated
Depleted Dark Surface (A11)
11-14
10 YR 5/2
80
10 YR 5/6
20
C
M
Sandy Clay Loam
Saturated
PCW6*
0-4
10 YR 3/2
100
Sandy Clay Loam
Not Saturated
Depleted Matrix (F3)
4 - 18
10 YR 5/1
90
10 YR 5/8
10
C
M
Sandy Clay Loam
Not Saturated
Depleted Dark Surface (A11)
18 - 28
10 YR 5/1
65
10 YR 5/8
35
C
M
Sandy Clay Loam
Not Saturated
PCW1
0-7
10 YR 3/2
100
Sandy Loam
Not Saturated
Depleted Matrix
7-15
10 YR 4/1
95
10 YR 5/8
5
C
M
Sandy Loam
Not Saturated
Depleted Dark Surfaccee (A11)
15 - 28
10 YR 5/1
90
10 YR 5/8
10
C
M
Sandy Clay Loam
Not Saturated
PCW2
0-3
10 YR 3/2
100
Sandy Clay Loam
Not Saturated
Depleted Matrix (F3)
3-10
10 YR 4/1
90
10 YR 5/8
10
C
M
Sandy Clay Loam
Saturated
Depleted Dark Surface (A11)
10-30
10 YR 5/1
80
10 YR 5/8
20
C
M
Sandy Clay Loam
Saturated
BHW5
0-5
10 YR 3/1
100
Sandy Loam
Not Saturated
Depleted Matrix (F3)
5-9
10 YR 4/1
100
Sandy Clay Loam
Not Saturated
Depleted Dark Surface (A11)
9 - 25
10 YR 5/1
80
10 YR 5/8
20
C
M
Sandy Clay
Not Saturated
......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
BHW6
0-3
10 YR 3/1
100
Sandy Loam
Not Saturated
3-9
10 YR 4/1
95
10 YR 5/8
5
C
M
Sandy Loam
Not Saturated
Depleted Matrix (F3)
9 - 19
10 YR 5/1
80
10 YR 5/8
20
C
M
Sandy Clay Loam
Saturated
Depleted Dark Surface (A11)
19 - 28
10 YR 5/1
70
10 YR 5/8
30
C
M
Sandy Clay Loam
Saturated
BHW7
0-8
10 YR 3/2
100
Sandy Loam
Not Saturated
Depleted Matrix (F3)
8-20
10 YR 5/1
90
10 YR 5/8
10
C
M
Sandy Clay Loam
Not Saturated
Depleted Dark Surface (A11)
20 - 28
10 YR 5/1
90
10 YR 5/8
10
C
M
Sandy Clay Loam
Saturated
BHW8
0-5
10 YR 3/1
100
Sandy Loam
Not Saturated
Depleted Matrix (F3)
5 - 17
10 YR 4/1
80
10 YR 5/8
20
C
M
Sandy Clay Loam
Not Saturated
Depleted Dark Surface (A11)
17 - 28
10 YR 4/1
65
10 YR 6/8
35
C
M
Sandy Clay Loam
Not Saturated
BHW9**
0-3
10 YR 3/1
100
Sandy Loam
Not Saturated
3 - 12
10 YR 3/1
97
10 YR 6/8
3
C
M
Sandy Clay Loam
Not Saturated
Depleted Dark Surface (A11)
12 - 22
10 YR 4/1
95
10 YR 6/8
5
C
M
Sandy Clay Loam
Not Saturated
22 - 28
10 YR 4/1
80
10 YR 6/8
20
C
M
Sandy Clay Loam
Not Saturated
BHW10**
0 - 8
10 YR 2/1
100
Sandy Loam
Not Saturated
8 - 16
10 YR 3/1
50
10 YR 5/8
10
C
M
Sandy Clay Loam
Not Saturated
Depleted Matrix (F3)
10 YR 4/1
40
16 - 28
10 YR 5/1
45
10 YR 5/8
30
C
M
Sandy Clay Loam
Not Saturated
BHW11 **
0 - 3
10 YR 3/1
100
Sandy Loam
Not Saturated
3-8
10 YR 3/2
100
Clay Loam
Not Saturated
Depleted Matrix (F3)
8 - 17
10 YR 4/1
100
Clay Loam
Not Saturated
Depleted Dark Surface (A11)
17 - 24
10 YR 4/1
95
10 YR 5/8
5
C
M
Clay Loam
Saturated
24 - 28
10 YR 5/1
70
10 YR 5/8
30
C
M
Clay Loam
Saturated
BHW12**
0-8
10 YR 2/2
100
Sandy Loam
Not Saturated
Depleted Matrix (F3)
8 - 14
10 YR 4/1
97
10 YR 4/6
3
C
M
Sandy Clay Loam
Not Saturated
Depleted Dark Surface (A11)
14 - 28
10 YR 5/1
60
10 YR 6/8
40
C
M
Sandy Clay Loam
Saturated
BHW13**
0-5
10 YR 3/1
100
Sandy Loam
Not Saturated
5 - 14
10 YR 5/1
95
10 YR 4/6
5
C
M
Sandy Loam
Not Saturated
Depleted Matrix (F3)
14 - 20
10 YR 5/1
85
10 YR 5/8
15
C
M
Sandy Loam
Not Saturated
Depleted Dark Surface (A11)
20 - 28
10 YR 5/1
85
10 YR 5/8
15
C
M
Sandy Loam
Saturated
BHW14**
0-7
10 YR 3/1
95
10 YR 4/6
5
C
M
Sandy Loam
Not Saturated
7 - 18
10 YR 5/1
80
10 YR 4/6
20
C
M
Sandy Loam
Not Saturated
Depleted Matrix
Depleted Dark Surfaccee (A11)
18 - 28
10 YR 4/1
60
10 YR 6/8
40
C
M
Sandy Clay Loam
Not Saturated
a - Type: C= Concentration
a - Loc: M = Matrix
Bonnerton NRWHF Wetland Hydrology Appendix A PCS Phosphate Company, Inc.
2019 Update July 2020

APPENDIX 6
2015-2018 Wetland Hydroperiods for Bonnerton NRWHF and
Upper Porter Creek Monitoring Wells

Appendix B-1a. 2015-2018 wetland hydroperiods for Bonnerton NRWHF and upper Porter Creek
monitoring wells during WETS normal and below normal rainfall. Rainfall from NOAA station Aurora 6N
used for long-term percentiles and to determine periods of normal rainfall.
2018 GROWING SEASON
Well
Consecutive
days WT-12"or
above
Dates
Cumulative days of
wetland hydroperiods
Longest hydroperiod
%283-day growing
season
Hydrologiczone of longest hydroperiod
<6%
>_6-12.5%
>12.5-25%
>25-75%
BH W 1
45
3/1-4/14
47
16.0
X
BHW2
46
2/28-4/14
51
16.3
X
.......................................................................................................................................................................................................................................................................................................................................................................................................................................................................
BHW3
46
2/28-4/14
51
16.3
X
BHW4
46
2/28-4/14
52
16.3
X
BHW5
46
2/28-4/14
52
16.3
X
BHW6
46
2/28-4/14
60
16.3
X
BHW7
46
2/28-4/14
61
16.3
X
BHW8
46
2/28-4/14
54
16.3
X
BHW9
46
2/28-4/14
52
16.3
X
BHW10
46
2/28-4/14
52
16.3
X
BH W 11
46
2/28-4/14
54
16.3
X
BHW12
46
2/28-4/14
52
16.3
X
BHW13
46
2/28-4/14
52
16.3
X
BHW14
46
2/28-4/14
52
16.3
X
PC1
45
3/1-4/14
49
16.0
X
PC2
46
2/28-4/14
52
16.3
X
PC3
45
3/1-4/14
50
16.0
X
PC4
46
2/28-4/14
51
16.3
X
PC5
46
2/28-4/14
52
16.3
X
PC6
46
2/28-4/14
52
16.3
X
2017 G ROWING SEASON
Well
Consecutive
days WT-12"or
above
Dates
Cumulative days of
wetland hydroperiods
Longest hydroperiod
%283-day growing
season
Hydrologiczone of longest hydroperiod
<6%
>_6-12.5%
>12.5-25%
>25-75%
BH W 1
48
2/28-4/16
50
17.0
X
BHW2
53
2/28-4/21
53
18.8
X
BHW3
48
2/28-4/16
50
17.0
X
BHW4
48
2/28-4/16
51
17.0
X
BHW5
55
2/28-4/23
65
19.5
X
BHW6
55;17;28
2/28-4/23; 5/25-6/10; 8/29-9/25
111
19.5
X
BHW7
55; 17; 31
2/28-4/23; 5/25-6/10; 8/29-9/28
130
19.5
X
BHW8
55; 31
2/28-4/23; 8/29-9/28
102
19.5
X
BHW9
55
2/28-4/23
63
19.5
X
BHW10
55
2/28-4/23
56
19.5
X
BH W 11
55
2/28-4/23
63
19.5
X
BHW12
53
2/28-4/21
54
18.8
X
BHW13
55
2/28-4/23
54
19.5
X
BHW14
52
2/28-4/20
52
18.4
X
PC1
45
2/28-4/13
46
16.0
X
PC2
47
2/28-4/15
49
16.7
X
PC3
46
2/28-4/14
46
16.3
X
PC4
52
2/28-4/20
52
18.4
X
PC5
53
2/28-4/21
53
18.8
X
.......................................................................................................................................................................................................................................................................................................................................................................................................................................................................
PC6
53
2/28-4/21
1 53
1 18.8
1
1
1 X
Bonnerton NRWHF Wetland Hydrology Appendix B
2019 Update
PCS Phosphate, Inc.
July 2020

Appendix B-1a concluded.
2016 GROWING SEASON
Well
Consecutive
days WT-12"or
above
Dates
Cumulative days of
wetland hydroperiods
Longest hydroperiod
%283-day growing
season
Hydrologiczone of longest hydroperiod
<6%
>_6-12.5%
>12.5-25%
>25-75%
BHW 1
44
3/6-4/19
44
15.5
X
BHW2
46
3/6-4/21
46
16.3
X
BHW3
45
3/6-4/20
45
15.9
X
BHW4
45
3/6-4/20
45
15.9
X
BHW5
80
3/6-5/24
80
28.3
X
BHW6
82
3/6-5/26
82
29.0
X
BHW7
80
3/6-5/24
80
28.3
X
BHW8
44; 18
3/6-4/19; 5/3-5/20
62
X
BHW9
80
3/6-5/24
80
��28.3
X
BHW10
72
3/6-5/16
72
X
BHW 11
82
3/6-5/26
82
29.0
X
BHW12
46
3/6-4/21
46
16.3
X
BHW13
51; 14
3/6-4/26; 5/3-5/16
65
18.0
X
BHW14
51
3/6-4/26
51
18.0
X
PC1
35
3/6-4/9
35
12.4
X
PC2
44
3/6-4/19
44
15.5
X
PC3
42
3/6-4/17
42
14.8
X
PC4
44
3/6-4/19
44
15.5
X
PC5
46
3/6-4/21
46
16.3
X
PC6
44
3/6-4/19
44
15.5
X
2015 GROWING SEASON (BHW wells not installed until June/July)
Well
Consecutive
days WT-12"or
Dates
Cumulative days of
wetland hydroperiods
Longest hydroperiod
%282-day growing
Hydrologiczone
of longest hydroperiod
<6%
>_6-12.5%
>12.5-25%
>25-75%
BHW1
0
None
0
0.0
X
BHW2
0
None
0
0.0
X
BHW3
17
11/3-11/19
17
6.0
X
BHW4
0
None
0
0.0
X
BHW5
18
11/2-11/19
18
6.4
X
BHW6
16; 18
7/12-7/27; 11/2-11/19
34
6.4
X
BHW7
18
11/2-11/19
18
6.4
X
BHW8
15; 18
7/12-7/26; 11/2-11/19
33
6.4
X
BHW9
16
11/4-11/19
16
5.7
X
BHW10
17
11/3-11/19
17
6.0
X
BHW11
15; 18
7/12-7/26; 11/2-11/19
33
6.4
X
BHW12
17
11/3-11/19
17
6.0
X
BHW13
17
11/3-11/19
17
6.0
X
BHW14
17
11/3-11/19
17
6.0
X
PC1
65;17
2/28-5/3; 11/3-11/19
82
23.0
X
PC2
65;17
2/28-5/3; 11/3-11/19
82
23.0
X
PC3
65;17
2/28-5/3; 11/3-11/19
82
23.0
X
PC4
67;15
2/28-5/5; 11/5-11/19
80
23.8
X
PC5
67;15
2/28-5/5; 11/5-11/19
80
23.8
X
PC6
69;17
2/28-5/7; 11/3-11/19
86
24.5
X
Bonnerton NRWHF Wetland Hydrology Appendix B
2019 Update
PCS Phosphate, Inc.
July 2020

Appendix B-1b. 2015-2018 wetland hydroperiods for Bonnerton NRWHF and upper Porter Creek monitoring wells independent of WETS
thresholds. Rainfall from NOAA station Aurora 6N used for long-term percentiles and to determine periods of normal rainfall.
2018 GROWING SEASON
Well
Consecutive days WT
12" or above
Dates
Cumulative days of
wetland hydroperiods
Longest hydroperiod-
% 283-day growing
season
Hydrologic zone of longest hydroperiod
<6%
1 >6-12.5%
>12.5-25%
>25-75%
BHW1
62, 20, 24
3/1-5/1; 5/18-6/6, 11/13-12/6
135
22.0
X
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
BHW2
64, 20, 17; 32
2/28-5/2; 5/18-6/6, 7/25-8/10, 11/5-12/6
158
22.7
X
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
BHW3
64; 20, 25; 32
2/28-5/2; 5/18-6/6; 7/25-8/18; 11/5-12/6
163
22.7
X
.....................................................................................................................................................................................................................................................................................................................................................................................................................2.....................................................................................................................................................................
BHW4
63; 20; 25; 32
2/28-5/1; 5/18-6/6; 7/24-8/17; 11/5-12/6
158
22.3
X
..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
BHW5
74, 27; 14, 31; 18, 32
2/28-5/12; 5/18-6/13; 6/18-7/1; 7/24-8/23; 9/14-10/1; 11/5-12/6
196
26.2
X
BHW6
126, 34, 20, 35
2/28-7/5; 7/24-8/26, 9/14-10/3; 11/2-12/6
216
44.7
X
BHW7
78, 49; 35; 22; 35
2/28-5/16, 5/18-7/5; 7/24-8/27; 9/14-10/5; il/2-12/6
221
27.7
X
BHW8
74, 30, 15; 33; 17; 32
2/28-5/12; 5/18-6/16, 6/18-7/2; 7/24-8/25; 9/14-9/30, 11/5-12/6
202
26.2
X
BHW9
74, 23; 31; 16,32
2/28-5/12; 5/18-6/9; 7/24-8/23; 9/14-9/29; 11/5-12/6
190
26.2
X
BHW10
65; 21; 26, 14, 32
2/28-5/3; 5/18-6/7; 7/24-8/18, 9/14-9/27; 11/5-12/6
177
23.0
X
BHWll
77; 30, 15; 33; 19; 32
2/28-5/15; 5/18-6/16, 6/18-7/2; 7/24-8/25; 9/14-10/2; i1/5-12/6
208
27.3
X
BHW12
64; 21, 25, 32
2/28-5/2; 5/18-6/7; 7/24-8/17; 11/5-12/6
169
22.7
X
BHW13
66, 23; 30, 14, 32
2/28-5/4; 5/18-6/9; 7/24-8/22; 9/14-9/27; 11/5-12/6
186
23.4
X
BHW14
65; 22; 26, 32
2/28-5/3; 5/18-6/8, 7/24-8/18, 11/5-12/6
173
23.0
X
PC1
60, 16, 24
3/1-4/29; 7/25-8/9; 11/13-12/6
136
21.3
X
PC2
63; 20, 18, 32
2/28-5/1; 5/18-6/6;7/24-8/10;11/5-12/6
157
22.3
X
PC3
61; 17; 24
3/1-4/30; 7/25-8/10, 11/13-12/6
144
21.6
X
PC4
63; 20, 17; 32
2/28-5/1; 5/18-6/6, 7/25-8/10, 11/5-12/6
154
22.3
X
PC5
63; 20, 18, 32
2/28-5/1; 5/18-6/6, 7/24-8/10, 11/5-12/6
158
22.3
X
PC6
63; 20, 18, 32
2/28-5/1; 5/18-6/6, 7/24-8/10, 11/5-12/6
158
22.3
X
2017 GROWING SEASON
Well
Consecutive days WT-
12" or above
Dates
Cumulative days of
wetland hydroperiods
Longest hydroperi od
% 283-day growing
season
Hydrologic zone of longest hydroperiod
<6%
>6-12.5%
>12.5-25%
>25-75%
BH W 1
48
2/28-4/16
60
17.0
X
BHW2
53
2/28-4/21
69
18.8
X
BHW3
48
2/28-4/16
65
17.0
X
BHW4
48
2/28-4/16
67
17.0
X
BHW5
80
2/28-5/18
96
28.4
X
BHW6
103; 28
2/28-6/10, 8/29-9/25
145
36.5
X
BHW7
103; 31
2/28-6/10, 8/29-9/28
164
36.5
X
BHW8
79; 31
2/28-5/17; 8/29-928
133
28.0
X
BHW9
79
2/28-5/17
93
28.0
X
BHW10
65
2/28-5/3
83
23.0
X
BH W 11
81
2/28-5/19
96
28.7
X
BHW12
53
2/28-4/21
75
18.8
X
BHW13
65
2/28-5/3
79
23.0
X
BHW14
52
2/28-4/20
73
18.4
X
PCl
45
2/28-4/13
51
16.0
X
PC2
47
2/28-4/15
57
16.7
X
..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
PC3
46
2/28-4/14
53
16.3
X
.....................................................................................................................................................................................................................................................................................................................................................................................................................8.....................................................................................................................................................................
PC4
52
2/28-4/20
67
18.4
X
.....................................................................................................................................................................................................................................................................................................................................................................................................................8.....................................................................................................................................................................
PCS
53
2/28..4/21
69
18.8
X
..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
PC6
53
2/28-4/21
69
18.8
X
Bonnerton NRWHF Wetland Hydrology Appendix B PCS Phosphate, Inc.
2019 Update July 2020

Appendix B-1b concluded.
2016 GROWING SEASON
Well
Consecutive days W
12" or above
Dates
Cumulative days of
wetland hydroperiods
Longest hydroperiodT-
% 283-day growing
season
Hydrologic zone of longest hydroperiod
<6%
>_6-12.5 ,
>12.5-25 ,
>25-75 ,
BHW1
52
2/28-4/19
52
18.4
X
BHW2
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
54
2/28-4/21
54
19.1
X
BHW3
53; 29
2/28-4/20; 9/20-10/18
82
18.8
X
BHW4
53
2/28-4/20
53
18.8
X
BHW5
87; 18; 48
2/28-5/24, 5/29-6/15, 9/20-11/6
153
30.7
X
BHW6
89; 25; 56
2/28-5/26; 5/29-6/22; 9/12-11/6
170
31.4
X
BHW7
87; 19; 48
2/28-5/24, 5/29-6/16, 9/20-11/6
154
30.7
X
BHW8
52; 17; 17; 49
2/28-4/19; 5/3-5/19; 5/29-6/14; 9/12-10/30
135
18.4
X
BHW9
87; 17; 48
2/28-5/24; 5/29-6/14; 9/12-10/29
152
30.7
X
BHW10
79; 16; 44
2/28-5/16; 5/29-6/13; 9/12-10/25
170
27.9
X
BHW11
89; 25; 56
2/28-5/26; 5/29-6/23; 9/12-11/6
170
31.4
X
BHW12
54, 14, 33
2/28-4/21; 5/30-6/12; 9/20-10/22
101
19.1
X
BHW13
59; 14; 14; 42
2/28-4/26; 5/3-5/16; 5/31-6/13; 9/12-10/23
129
20.8
X
BHW14
59; 15; 41
2/28-4/26; 5/29-6/12; 9/12-10/22
115
20.8
X
PC1
42
2/28-4/9
42
14.8
X
PC2
52; 18
2/28-4/19;9/30-10/17
70
18.4
X
PC3
50
2/28-4/17
50
17.7
X
PC4
52; 17
2/28-4/19;9/30-10/16
69
18.4
X
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
PC5
54,29
2/28-4/21; 9/20-10/18
73
19.1
X
PC6
52; 28
2/28-4/19; 9/20-10/17
80
18.4
X
2015GROWING SEASON (BHW wells not installed until June/July)
Well
Consecutive days WT-
12" or above
Dates
Cumulative days of
wetland hydroperiods
Longest hydroperiod
% 282-day growing
Hydrologic zone of longest hydroperiod
<6%
>_6-12.5%
>12.5-25%
>25-75 ,
BHW1
17
11/20-12/6
17
6.1
X
BHW2
18
11/19-12/6
18
6.4
X
BHW3
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
15; 34
10/2-10/16, 11/3-12/6
49
12.1
X
BHW4
18
11/19-12/6
18
6.4
X
BHW5
25; 35
10/1-10/25, 11/2-12/6
60
12.4
X
BHW6
16; 67
7/12-7/27; 10/1-12/6
83
23.8
X
BHW7
25; 35
10/1-10/25, 11/2-12/6
60
12.4
X
BHW8
15; 35
7/12-7/26; 11/2-12/6
50
12.4
X
BHW9
15; 33
10/1-10/15, 11/4-12/6
48
11.7
X
BHW10
16; 34
10/2-10/17, 11/3-12/6
47
12.1
X
BHW11
15; 25; 35
7/12-7/26; 10/2-10/26; 11/2-12/6
75
12.4
X
BHW12
15; 34
10/2-10/16, 11/3-12/6
49
12.1
X
BHW13
16; 34
10/2-10/17, 11/3-12/6
50
12.1
X
BHW14
15; 34
10/2-10/16, 11/3-12/6
49
12.1
X
PC1
65;16; 34
2/28-5/3;10/1-10/16;11/3-12/6
115
23.0
X
PC2
65;14;17;34
2/28-5/3;6/3-6/16;10/1-10/17;11/3-12/6
130
23.0
X
PC3
65;16;34
2/28-5/3;10/1-10/16;11/3-12/6
115
23.0
X
PC4
67;16;17;32
2/28-5/5;6/3-6/18;10/1-10/17;11/5-12/6
132
23.8
X
PC5
...........PC6........
67;15;17;34
................69.16.18.34..............
2/28-5/5;6/3-6/17;10/1-10/17;11/3-12/6
...................................z...28-5...7.fi...3_...�.8.10..�_ ..6.................................
133
...........................137.........................
23.8
..........................24.5........................
............................
......................
X
...........X..........
............................
�0...18..1�...3-12
Bonnerton NRWHF Wetland Hydrology
2019 Update
Appendix B
PCS Phosphate, Inc.
July 2020

APPENDIX C
January — December 2019 Hydrology Graphs
NOTE: water levels greater than —30 inches below the ground surface exceed the length of the
well casing for the shallow hydrology LevelTROLL monitors. Periods of horizontal water level
shown on the hydrology graphs indicate the actual water level is deeper than that horizontal
value.

J
BHW1 Water Level
Jan -Feb 2019, PCS Phosphate
30
20
10
0
-30
-40
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
N N N N N
Date sews •Poker Rainfa 11
3 30
2.5 20
10
2 L
U
N C
W
L 0
U y
C >
1.5 =_
-10
1 � �
_ -20
m
0.5 30
0 -40
BHW1 Water Level
Mar- Apr 2019, PCS Phosphate
3
2.5
2
N
L
U
C
1.5
C
1
0.5
0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
m m M M M v v v v v v
Date sews •Poker Rainfall
BHW1 Water Level
May - Jun 2019, PCS Phosphate
30 3.5
20 3
10 2.5
L
U
C y
_ N
N 0 2 L
> U
N C_
J
N N
-10 1.5
M �
_ -20 1
m
-30 0.5
-40 IN 0
in rn M r u� rn N co o v m N co 0
Data •BHW1 •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW1 Water Level
BHW1 Water Level
Jul -Aug 2019, PCS Phosphate
Sept- Oct 2019, PCS Phosphate
30
7.5
30
5.5
7
5
20
6.5
20
6
4.5
IQ
10
5.5
m
10
4
c
5 N
C
3.5
0
4.5 °
_
0
3
4
J
s
-10
3.5
10
2.5�
c
2
2.5
m
-20
2
-20
1.5
1.5
ell data
ap
1
-30
1
30
0.5
0.5
-40
0
40
0
— — — — — �5 �5 — —
— — — —
m m
81
c
c
e
DatC .e nwi
•Po2eP.ilx�ll
Date •BFhN1
•Potler
Rainfall
BHW1 Water Level
Nov - Dec 2019, PCS Phosphate
30 3
20 2.5
10
L 2
U
C y
_ N
N 0 L
U
N C
1.5
-10
3
M 1
_ -20
m
-30 wlldtogp 0.5
-40 0
in rn M r u� rn M r u� rn M r
Date -MM •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

J
30
20
10
0
-30
-40
BHW2 Water Level
Jan -Feb 2019, PCS Phosphate
3 30
2.5 20
10
2 t
U
N C
W
t 0
U y
C >
1.5 =_
-10
1 � N
_ -20
m
0.5 30
0 -40
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
N N N N N
Date .BR W2 •Poker Rainfa 11
BHW2 Water Level
Mar- Apr 2019, PCS Phosphate
3
2.5
2
N
L
U
C
1.5
C
1
0.5
0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
m m m m m v v v v v v
Date .BR W2 •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW2 Water Level
Jul -Aug 2019, PCS Phosphate
30
20
10
0
-10
3
_ -20
m
-30
-40
n n r r r m m m m m m
Date .BHwz •Poker Rainfall
7.5
7
6.5
6
5.5
5
N
4.5
L
4
3.5 A
3 `
2.5
2
1.5
1
0.5
0
au
20
10
L
U
C
0
d
J
-10
3
_ -20
m
-30
-40
BHW2 Water Level
Sept - Oct 2019, PCS Phosphate
0.0
5
4.5
4
3.5 y
d
L
3
2.5
2
1.5
1
0.5
0
rn rn rn rn rn � � o 0 0 0 0 0
Date •BHW2 •Poker Rainfall
BHW2 Water Level
Nov - Dec 2019, PCS Phosphate
30 3
20 2.5
10
L 2
U
C y
_ N
N 0 L
U
N C
J 1.5
-10
3
N 1
x -20
m
-30 0.5
-40 0
Date BHW2 •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

J
30
20
10
0
30
40
BHW3 Water Level
Jan -Feb 2019, PCS Phosphate
3 30
2.5 20
10
2 t
U
N C
W
t 0
U y
C >
1.5 =_
C �
-10
1 � M
_ -20
m
0.5 30
0 -40
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
N N N N N
Date GBH W3 •Po rter Rainfa 11
BHW3 Water Level
Mar -Apr 2019, PCS Phosphate
3
2.5
2
N
L
U
C
1.5
C
1
0.5
0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
m m m m m v v v v v v
Date •BHW3 •Porter Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW3 Water Level
BHW3 Water Level
Jul -Aug 2019, PCS Phosphate
Sept - Oct 2019, PCS Phosphate
30
7.5
30
5.5
7
5
20
6.5
20
6
4.5
10
5.5
d 10
4
5
4.5 L
3.5
L
4
d o
3
J
3.5 A
J
d
2.5
-10
`c
m -10
`c
2
2.5
m -zo
2
m -20
1.5
1.5
1
30or
1
-30
0.5
0.5
ao
0
-40
0
in
rn m n � u� rn a co o v m
n n r r r m m m
ZB 6
a co o
m m m
n n n
rn rn rn rn rn � � o 0 0 0 0 0
Date ■M—
Date ■BHW3 •Poker Rainfall
•Poker Rainfall
BHW3 Water Level
Nov - Dec 2019, PCS Phosphate
30 3
20 2.5
10
L 2
U
C y
_ N
N 0 L
U
N C
J 1.5
10
3
M 1
x -20
m
-30 0.5
-40 0
in rn M r u� rn M r u� rn M r
Date ■BHW3 •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW4 Water Level
Jan -Feb 2019, PCS Phosphate
30
20
2.5
w 10
U
C
2
w 0
1.5
-10
1
_ -20
m
0.5
-30
-40
rn rn rn rn
0
rn rn rn rn rn rn rn rn rn rn rn
N N N N N
Date
GBH W4 •Porter Rainfall
30
20
10
0
BHW4 Water Level
Mar -Apr 2019, PCS Phosphate
3
2.5
2
N
W
U
C
1.5
C
1
0.5
0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
m m m m m v v v v v v
Date •BHW4 •Porter Rainfall
BHW4 Water Level
May - Jun 2019, PCS Phosphate
30 3.5
20 3
10 2.5
L
U
C y
_ N
N 0 2 L
> U
N C_
J
N N
-10 1.5
v �
_ -20 1
m
-30 0.5
-40 0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
in rn m r u� rn N co o v m N co 0
Date •BHW4 •Porter Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW4 Water
Level
BHW4 Water Level
Jul -Aug 2019, PCS
Phosphate
Sept - Oct 2019, PCS Phosphate
30
7.5
30
5.5
7
5
zo
6.5
20
6
4.5
10
5.5
d 10
4
5
4.5 L
3.5
L
0
4
d o
3
J
3.5 A
J
d
2.5
-10
`c
m -10
`c
2
2.5
m -zo
2
m -zo
1.5
1.5
1
-30
1
-30
0.5
11
0.5
-40
0
-40
0
Izz r r7 7Q Q Q
n n r r r
W W Q Q 2
m m m m m m
p) N N N 6 6
rn rn rn rn rn � � o 0
N N M
0 0 0 0
Date
Date •BHW4
•BHW4 •Poker Rainfall
•Poker Rainfall
BHW4 Water Level
Nov - Dec 2019, PCS Phosphate
30 3
20 2.5
10
L 2
U
C y
_ N
N 0 L
U
N C
J 1.5
-10
3
� 1
_ -20
m
-30 0.5
-40 0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn T rn
in rn m r u� rn m r u� rn m r
Date •BHW4 •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW5 Water Level
Jan -Feb 2019, PCS Phosphate
30
20
3
2.5
v 10
t
U
C
2
w 0
1.5
-10
�
1
-20
m
0.5
-30
-40
rn rn rn rn
0
rn rn rn rn rn rn rn rn rn rn rn
N N N N N
Date
■BRWS .Pone�Ramrau
30
20
10
0
BHW5 Water Level
Mar -Apr 2019, PCS Phosphate
3
2.5
2
N
W
U
C
1.5
C
1
0.5
0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
m m m m m v v v v v v
Date ■BRWS •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

30
20
10
0
-30
-40
BHW5 Water Level
Jul -Aug 2019, PCS Phosphate
7.5
7
6.5
6
5.5
5
N
4.5 r
4
3.5 A
3 `
2.5
2
1.5
1
0.5
0
� rn m
n n r r r m m m m m m
Date .M— •Poker Rainfall
BHW5 Water Level
Sept - Oct 2019, PCS Phosphate
30 5.5
5
20
4.5
d 10 4
L
3.5 y
- d
N 0 L
3
-10 2.5
A
2
m-20 1.5
1
-30
0.5
-40 0
rn rn rn rn rn � � o 0 0 0 0 0
Date M. •Poker Rainfall
BHW5 Water Level
Nov - Dec 2019, PCS Phosphate
30 3
20 2.5
10
L 2
U
C y
— N
d 0 u
> C
1.5
-10
3
1
_ -20
m
-30 0.5
-40 0
in rn m
� � �
Date •BHW5 •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW6 Water Level
Jan -Feb 2019, PCS Phosphate
30
20
3
2.5
v 10
t
U
C
2
w 0
1.5
-10
�
1
-20
m
0.5
-30
-40
rn rn rn rn
0
rn rn rn rn rn rn rn rn rn rn rn
iB
(O
N N N N N
Date
■BRNTi .Pone�Ramrau
30
20
10
0
BHW6 Water Level
Mar -Apr 2019, PCS Phosphate
3
2.5
2
N
W
U
C
1.5
C
1
0.5
0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
m m m m m v v v v v v
Date ■BRNTi •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW6 Water Level
BHW6 Water Level
Jul -Aug 2019, PCS Phosphate
Sept - Oct 2019, PCS Phosphate
30
7.5
30
5.5
7
5
20
6.5
20
6
4.5
10
5.5
d 10
4
5
4.5 L
3.5
L
q
0
3
J
3.5 A
J
d
2.5
-10
`c
m -10
`c
2
3
2.5
3
m -zo
2
m -zo
1.5
1.5
1
30
1
30
0.5
0.5
-40
0
-40
0
n n r r r m m m m m m
rn rn rn rn rn � � o 0 0 0 0 0
Date ■M— •Poker Rainfall
Date ■M— •Poker Rainfall
BHW6 Water Level
Nov - Dec 2019, PCS Phosphate
30 3
20 2.5
10
L 2
U
C y
_ N
N 0 L
U
N C
J 1.5
-10
3
fO 1
_ -20
m
-30 0.5
-40 oot0
in rn m r u� rn m r u� rn m r
Date ■M— •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW7 Water Level
Jan -Feb 2019, PCS Phosphate
30
20
3
2.5
v 10
t
U
C
2
w 0
1.5
-10
�
1
_ -20
m
0.5
-30
-40
rn rn rn rn
0
rn rn rn rn rn rn rn rn rn rn rn
iB
(O
N N N N N
Date
■BRWI .Pone�Ramrau
30
20
10
0
BHW7 Water Level
Mar -Apr 2019, PCS Phosphate
3
2.5
2
N
W
U
C
1.5
C
1
0.5
0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
m m m m m v v v v v v
Date ■BRWI •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

30
20
10
0
-30
-40
BHW7 Water Level
Jul -Aug 2019, PCS Phosphate
7.5
7
6.5
6
5.5
5
N
4.5 r
4
3.5 A
3 `
2.5
2
1.5
1
0.5
0
� rn m
n n ^ ^ ^ ro ro ro ro ro ro
Date .M— •Poker Rainfall
BHW7 Water Level
Sept - Oct 2019, PCS Phosphate
30 5.5
5
20
4.5
d 10 4
L
3.5 y
- d
N o L
3
_10 2.5
2
m-20 1.5
1
-30
0.5
-40 0
rn rn rn rn rn � � o 0 0 0 0 0
Date •BHWI •Poker Rainfall
BHW7 Water Level
Nov - Dec 2019, PCS Phosphate
30 3
20 2.5
10
L 2
U
C y
— N
N o L U
> C
1.5
-10
3
^ 1
_ -20
m
-30 0.5
-40 0
Date •M— •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW8 Water Level
Jan -Feb 2019, PCS Phosphate
30
20
3
2.5
v 10
L
U
C
2
w 0
1.5
-10
�
1
_ -20
m
0.5
-30
-40
rn rn rn rn
0
rn rn rn rn rn rn rn rn rn rn rn
iB
(O
N N N N N
Date
■BRNB .Pone�Ramrau
30
20
10
0
BHW8 Water Level
Mar -Apr 2019, PCS Phosphate
3
2.5
2
N
W
U
C
1.5
C
1
0.5
0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
m m m m m v v v v v v
Date ■BRNB •Poker Rainfall
BHW8 Water Level
May - Jun 2019, PCS Phosphate
30 3.5
20 3
10 2.5
L
U
C y
_ N
d 0 2 L
> U
N C
J
N N
-10 1.5 C
n �
_ -20 1
m
-30 0.5
-40 0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
in rn m r � u� rn N co o v m N co 0
Date ■BRNB •Porter Rainfi 11
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW8 Water Level
BHW8 Water Level
Jul- Aug 2019, PCS Phosphate
Sep- Oct 2019, PCS Phosphate
30
7.5
30
5.5
7
5
20
6.5
20
6
4.5
10
5.5
10
4
5 y
L
=_
3.5 y
L
N 0
U
4
N O
;
U
3
J
3.5 A
J
d
2.5
-10
`c
m -10
c
2.5
2
x -20
m
2
m -20
1.5
1.5
1
-30
1
30
0.5
0.5
ao
0
40
0
n n r r r
m m
. .
m m m m
N N N N N M
rn rn rn rn
Date
Date -M- •Porter Rainfall
■M—
•Poker Rainfall
BHW8 Water Level
Nov - Dec 2019, PCS Phosphate
30 3
20 2.5
10
L 2
U
C y
_ N
N 0 L
U
N C
J 1.5
-10
3
°D 1
_ -20
m
-30 0.5
-40 0
Date -M— •Porter Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW9 Water Level
Jan -Feb 2019, PCS Phosphate
30
20
3
2.5
w 10
t
U
C
2
w 0
1.5
-10
�
1
-20
m
0.5
-30
LH
-40
rn rn rn rn
0
rn rn rn rn rn rn rn rn rn rn rn
N N N N N
Date
■BRN9 .Pone�Ramrau
30
20
10
0
BHW9 Water Level
Mar -Apr 2019, PCS Phosphate
3
2.5
2
N
W
U
C
1.5
C
1
0.5
0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
m m m m m v v v v v v
Date ■BRN9 •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW9 Water Level
BHW9 Water Level
Jul -Aug 2019, PCS Phosphate
Sept - Oct 2019, PCS Phosphate
30
7.5
30
5.5
7
5
zo
6.5
20
6
4.5
10
5.5
d 10
4
5
4.5 L
3.5
L
0
4
> 0
3
J
3.5 A
J
d
2.5
-1
m 0
`c
m -10
`c
2
2.5
m -zo
2
m -zo
1.5
1.5
1
30
1
-30
L0.5L
0.5
ao
in
0
-40
u�
0
rn m r u� rn N co o v m N co o
rn m r u� rn m r u� rn m r
n n r r r m m m m m m
Date �M— •Poker Rainfall
rn rn rn rn rn � � o 0 0 0 0 0
Date •BHN9 •Poker Rainfall
BHW9 Water Level
Nov - Dec 2019, PCS Phosphate
30 3
20 2.5
10
L 2
U
C y
_ N
N 0 L U
> C
1.5
-10
3
1
_ -zo
m
-30 0.5
-40 0
in rn m r u� rn m r u� rn m r
Date •M— •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW10 Water Level
Jan -Feb 2019, PCS Phosphate
30
20
3
2.5
w 10
L
U
C
2
w 0
1.5
-10
0
1
m -20
0.5
-30
40
rn rn rn rn
0
rn rn rn rn rn rn rn rn rn rn rn
N N N N N
Date
■BHwm .Pone�Ramfau
30
20
10
0
BHW10 Water Level
Mar -Apr 2019, PCS Phosphate
3
2.5
2
N
W
U
C
1.5
C
1
0.5
0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
m m m m m v v v v v v
Date ■BHwfo •Poker Rainfall
BHW10 Water Level
May - Jun 2019, PCS Phosphate
30 3.5
20 3
10 2.5
L
U
C y
_ N
d 0 2 L
> U
N C_
J
N N
-10 1.5
3
0
3 -20 1
m
-30 0.5
-40 0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
in rn m r u� rn N co o v m N co 0
Data ■BHW10 •Porter Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW10 Water
Level
BHW10 Water Level
Jul -Aug 2019, PCS Phosphate
Sept - Oct 2019, PCS Phosphate
30
7.5
30
5.5
7
5
20
6.5
20
6
4.5
10
5.5
d 10
4
5
4.5 L
3.5
L
4
d o
3
J
3.5 A
J
d
25
.`c
-10
`c
m -10
0
2
2.5
_ -zo
2
3: -20
1.5
m
1.5
m
1
-30
1
-30
0.5
0.5
-40
0
-40
0
n n r r r
m m m m m m
rn rn rn rn rn � � o 0 0 0 0 0
Date
Date ■BHW10 •Poker Rainfall
■gHW10 •Poker Rainfall
BHW10 Water Level
Nov - Dec 2019, PCS Phosphate
30 3
20 2.5
10
L 2
U
C y
_ N
N 0 L
U
N C
J 1.5
-10
3
0 1
-20
m
-30 0.5
-40 0
in rn m r u� rn m r u� rn m r
Date ■BHW10 •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW11 Water Level
Jan -Feb 2019, PCS Phosphate
30
20
2.5
w 10
t
U
C
2
w 0
1.5
-10
�
1
-20
m
0.5
-30
-40
rn rn rn rn
Q
� Q m
0
rn rn rn rn rn rn rn rn rn rn rn
N N N N N
Date
•BH W11 •Po rter Rainfa 11
30
20
10
0
_ J
-10
K
-20
m
30
-40
BHW11 Water Level
Mar -Apr 2019, PCS Phosphate
3
2.5
2
N
W
U
C
1.5
C
1
0.5
0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
m m m m m v v v v v v
Date GBH W11 •Porter Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW11 Water
Level
BHW11 Water Level
Jul -Aug 2019, PCS Phosphate
Sept - Oct 2019, PCS Phosphate
30
7.5
30
5.5
7
5
20
6.5
zo
6
4.5
10
5.5
d 10
4
5
4.5 L
3.5
L
0
4
d o
3
J
3.5 A
J
d
2.5
m -10
`c
m -10
`c
2
2.5
_ -20
2
= -20
1.5
m
1.5
m
1
30
1
30
I III
1
0.5
0.5
-40
Ll
I
11
0
-40
0
in rn m n � u� rn N
Izz r r7 7Q Q Q W
n n r r r
co o v m
W Q Q Q
m m m m m m
p) p) p) N N N 6 6 N N M
rn rn rn rn rn � � o 0 0 0 0 0
Date
Date •BHW11 •Porter Rainfall
•BHW11 •Porter Rainfall
BHW11 Water Level
Nov - Dec 2019, PCS Phosphate
30 3
20 2.5
10
L 2
U
C y
_ N
N o L
U
N C
J 1.5
-10
3
1
3 -20
m
-30 0.5
-40 0
in rn m r u� rn m r u� rn m r
Date •BHW11 •Porter Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

30
20
10
0
30
40
BHW12 Water Level
Jan -Feb 2019, PCS Phosphate
3 30
2.5 20
10
2 t
U
N C
W
t 0
U y
C >
1.5 =_
-10
1 � N
2� -20
2
m
0.5 30
0 -40
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
N N N N N
Date •BH W12 •Po rter Rainfa 11
BHW12 Water Level
Mar -Apr 2019, PCS Phosphate
3
2.5
2
N
L
U
C
1.5
C
1
0.5
0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
m m m m m v v v v v v
Date GBH W12 •Porter Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

30
20
to
0
-30
-40
BHW12 Water Level
Jul -Aug 2019, PCS Phosphate
7.5
7
6.5
6
5.5
5
N
4.5 r
4
3.5 A
3 `
2.5
2
1.5
1
0.5
0
� rn m
n n r r r m m m m m m
Date .BHwiz •Poker Rainfall
BHW12 Water Level
Sept - Oct 2019, PCS Phosphate
30 5.5
5
20
4.5
d 10 4
L
3.5 y
- d
N o L
3
_10 25 C
2
N
_ -20 1.5
Qf
1
-30
0.5
-40 0
rn rn rn rn rn � � o 0 0 0 0 0
Date •MMW •Poker Rainfall
BHW12 Water Level
Nov - Dec 2019, PCS Phosphate
30 3
20 2.5
10
L 2
U
C y
— N
N o L
U
N C
J 1.5
-10
3
N 1
?i -20
Qf
30 0.5
-ao 0
_ in rn m
Date •BHW12 •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

J
30
20
10
0
-30
-40
BHW13 Water Level
Jan -Feb 2019, PCS Phosphate
3 30
2.5 20
10
2 t
U
N C
W
t 0
U y
C >
1.5 =_
C �
-10
1 � M
2� -20
2
m
0.5 30
0 -40
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
Q Q m
N N N N N
Date �gH W13 •Poker Rainfa 11
BHW13 Water Level
Mar- Apr 2019, PCS Phosphate
3
2.5
2
N
L
U
C
1.5
C
1
0.5
0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
m m m m m v v v v v v
Date •BH W13 •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW13 Water Level
BHW13 Water Level
Jul -Aug 2019, PCS Phosphate
Sept - Oct 2019, PCS Phosphate
30
7.5
30
5.5
7
5
20
6.5
20
6
4.5
10
5.5
d 10
4
5
45 L
3.5
L
4
d o
3
J
d
3.5 A
J
d
2.5
-10
`c
m -10
`c
M
2
M
2.5
_ -zo
2
= -zo
1.5
m
1.5
m
1
-30
1
-30
ILH
0.5
0.5
-40
0
-40
0
n n r r r m m m
m m m
rn rn rn rn rn � � o 0 0 0 0 0
Date ■M-13
Date ■MM3 •Porter Rainfall
•Porter Rainfall
BHW13 Water Level
Nov - Dec 2019, PCS Phosphate
30 3
20
2.5
10
L
U
C
2
y
_
o
N
L
N
U
C
N
J
1.5
-10
3
M
1
-20
2
m
-30
0.5
d,
0
-40
in rn M r u� rn M r u� rn M r
Date ■M-13 •Porter Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

30
20
10
0
-30
-40
BHW14 Water Level
Jan -Feb 2019, PCS Phosphate
3 30
2.5 20
10
2 t
U
N C
W
t 0
U y
C >
1.5 =_
-10
1 � �
-20
m
0.5 30
0 -40
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
Q Q m
N N N N N
Date -M-14 •Poker Rainfa 11
BHW14 Water Level
Mar- Apr 2019, PCS Phosphate
3
2.5
2
N
L
U
C
1.5
C
1
0.5
0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
m m m m m v v v v v v
Date •M-14 •Poker Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020

BHW14 Water Level
BHW14 Water Level
Jul -Aug 2019, PCS Phosphate
Sept - Oct 2019, PCS Phosphate
30
7.5
30
5.5
7
5
20
6.5
20
6
4.5
10
5.5
d 10
4
5
45 L
3.5
L
0
4
d o
3
J
d
3.5 A
J
d
2.5
-10
`c
m -10
`c
2
2.$
_ -20
2
= -20
1.5
m
1.5
m
1
30
1
30
J0.5
0.5
ao
0
ao
0
n n r r r m m m m m m
rn rn rn rn rn � � o 0 0 0 0 0
Date •M-14 •Porter Rainfall
Date •MM4 •Porter Rainfall
BHW14 Water Level
Nov - Dec 2019, PCS Phosphate
30 3
20 2.5
10
L 2
U
C y
_ N
N 0 L
U
N C
J 1.5
-10
1 �
3 -20
m
-30 0.5
-40 0
rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn rn
_ in rn m
Date •M-14 •Porter Rainfall
Bonnerton NRWHF Wetland Hydrology Appendix C PCS Phosphate Company, Inc.
2019 Update July 2020