Huntsman_2022 IRT Walk_2022-10-13

% &V
WILDLANDS
ENGINEERING
MEETING NOTES
MEETING: MY0/MY1 (2022) IRT Site Walk
HUNTSMAN Mitigation Site
Yadkin 03040102; Wilkes County, NC
DEQ Contract No. 7891
DMS Project No. 100123
USACE Action ID No. SAW-2019-00836
DWR Project No. 20190866
Wildlands Project No. 005-02183
DATE: Thursday, October 13, 2022
LOCATION: Ingle Hollow Road
Ronda, NC
Attendees
Kim Isenhour, USACE Melonie Allen, DMS Aaron Earley, Wildlands
Erin Davis, DWR Shawn Wilkerson, Wildlands
Paul Wiesner, DMS Kristi Suggs, Wildlands
Matthew Reid, DMS Emily Israel, Wildlands
The meeting began at 9:30 AM. Attendees discussed the site conditions and issues noted in the MYO report as
well as the IRT comments and Wildlands responses. From there, the group walked up UT1, down to the repair
section on North Little Hunting Creek, over to Old Bus Branch, Rifle Trib, and UT2 headwaters, and ended along
Barn Branch. The meeting concluded at 11:30 AM.
1) Meeting Notes
a) Attendees viewed the sill on UT1 downstream of the culvert under Ingle Hollow Road. Aaron explained
that the sill was designed and installed 6" higher than the culvert invert but has failed since
construction. Water is piping around the end of the sill, which lowered the baseflow elevation.
Wildlands plans on repairing the sill to the design elevation.
b) On the UT1 riffles within the old pond bed, Kim noted that the riffle material could be embedded more
to encourage baseflow over the stone instead of under. Kim also suggested that the saprolite riffle near
the chicken houses be repaired with stone and grade control. Wildlands agreed that the section through
the pond needs work. Wildlands plans on adding and embedding riffle material, planting supplemental
live stakes and herbaceous seed, and installing sod mats on the stream banks to get that section back to
restored conditions. Kim pointed out that the hillside slope used for repair access should be stabilized.

c) Attendees observed the riprap ditches on the terrace slope near the chicken houses, which were not
included in the approved mitigation plan. Aaron explained that the riprap ditches were added during
construction once Wildlands saw the amount of runoff coming from the chicken houses during storm
events. Kim and Erin said they weren't opposed to using riprap in those situations but suggested that
the riprap be embedded and planted. They also suggested to end the riprap and the base of the terrace
slope to allow water to flow through the planted buffer before entering the stream. Erin asked that a
narrative of justification for adding riprap stabilization measures be included in the MY1 report.
Wildlands agreed with Kim and Erin's suggestions and will take them into consideration for future
projects.
d) Kim asked that photos of the riprap ditches and BMPs be included in future MY reports. Wildlands
agreed.
e) Paul and Kim asked about supplemental live stake planting on the upstream section of UT1 and
suggested using willow whips to establish shade quicker. Wildlands plans to supplementally plant live
stakes along most of UT1.
f) Kim asked if there are plans for in -stream vegetation treatment on UT1. Emily replied that in -stream
treatment was done this past summer and will occur again next year.
g) Outside of the easement near the chicken houses, Erin suggested that riprap be added to the
concentrated flow areas along the farm passageway. Wildlands plans on working with landowner to add
stone ford type crossings on each of the ditches along the fence line. Wildlands will add a permanent
photo point at each ditch.
h) Near the repaired section on North Little Hunting Creek, Erin suggested that flatter terrace slopes be
used to avoid the formation of rills. Wildlands agreed that flatter slopes are better, but earthwork and
topsoil impacts must be considered during design.
i) Kim questioned the placement of VP1 along North Little Hunting Creek. She was wondering about the
performance and level of saturation of the plot because on the aerial map it looks like the plot is located
where the old channel used to be. Kristi visited the veg plot during the meeting and said that plot looked
good overall. There were a few saturated areas, but it was mostly just damp from the recent rainfall,
and all 15 planted stems were viable and doing well.
j) Kim asked whether the overhead electric line crossing North Little Hunting Creek was an internal or
external break. Wildlands confirmed that it is an internal crossing with no credit.
k) Erin asked if this was a site where wetland gages were requested. Aaron replied that wetland gages
were not installed nor required on this site. Since there were no wetland gages on the site, Kim
requested that site's wetlands be re -verified before close-out. Wildlands agreed.
1) Attendees viewed the BMPs at the top of Old Bus and Rifle Trib. Kim and Erin inquired about the
deviation in BMP type, on Rifle Trib, from the approved mitigation plan. Aaron explained that the steep
slope at the upstream end of Rifle Trib was not conducive to a pocket pool with rock outlet weir so a
step pool conveyance was installed instead. The step pool conveyance appeared stable with no
sedimentation issues.
Wildlands Engineering, Inc. page 2
HUNTSMAN Mitigation Site
MYO IRT Site Walk

m) Kim requested that a mobile veg plot be added in the wetland at the headwaters of Barn Branch and
near photo point 19. Wildlands will relocate one mobile veg plot in each requested wetland and will
report the collected vegetation data MY2.
n) Kim requested that a discussion be included in the MY1 report about the maintenance work that has
been completed and will be completed, as well as mapping their locations on the CCPV maps.
o) Kim and Paul stated that MYO credits have already been released.
These meeting minutes were prepared by Aaron Earley on October 18, 2022, and represent the authors' interpretation of
events. Please report and discrepancies or corrections within S business days of receipt of these minutes.
Wildlands Engineering, Inc. page 3
HUNTSMAN Mitigation Site
MYO IRT Site Walk