20180785 Ver 1_USACE eApproval Letter_20200214

Strickland, Bev
From: Browning, Kimberly D CIV USARMY CESAW (USA)
<[e-mail]>
Sent: Friday, February 14, 2020 12:05 PM
To: Baumgartner, Tim
Cc: Tugwell, Todd J CIV USARMY CESAW (US); Kim Browning; Haupt, Mac; Davis, Erin B;
Wilson, Travis W.; Bowers, Todd; Merritt, Katie; Williams, Andrew E CIV USARMY
CESAW (USA); [e-mail]; Wells, Emily N; McLendon, C S CIV
USARMY CESAW (USA); Crumbley, Tyler A CIV USARMY CESAW (USA); Gibby, Jean B
CIV USARMY CESAW (USA); Dow, Jeremiah J; Crocker, Lindsay; Tim Morris
Subject: [External] eApproval Letter/ NCDMS Hip Bone Creek Site/ Chatham Co./
SAW-2018-01160
Attachments: eApproval Letter -Hip Bone Creek_2018-01160.pdf, Draft Mit Plan Comment
Memo -Hip Bone Creek_2018-01160.pdf
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Mr. Baumgartner,
Attached is the Hip Bone Creek Draft Plan approval letter and copies of all comments generated during the project
review. Please note that this letter approves the Draft Mitigation Plan provided that the Final Mitigation Plan
adequately addresses all comments on the attached memo. Please provide a copy of the Final Mitigation Plan when you
submit the Preconstruction Notice for the NWP 27. If no permit is required to construct the project, please submit a
copy of the Final Mitigation Plan to our office at least 30 days prior to beginning construction. Also, please ensure that a
copy of the Final Mitigation Plan is posted to the NCDMS project documents so that all members of the IRT have access
to the Final plan.
Please let me know if you have any questions about the process or the attached letter. Have a great weekend.
Respectfully,
Kim Browning
Mitigation Project Manager, Regulatory Division I U.S. Army Corps of Engineers
3331 Heritage Trade Dr, Ste. 105 1 Wake Forest, NC 27587 1 919.554.4884 x60
BUILDING STRONG (r)

REPLY TO
ATTENTION OF:
Regulatory Division
DEPARTMENT OF THE ARMY
WILMINGTON DISTRICT, CORPS OF ENGINEERS
69 DARLINGTON AVENUE
WILMINGTON, NORTH CAROLINA 28403-1343
February 14, 2020
Re: NCIRT Review and USACE Approval of the NCDMS Hip Bone Creek Mitigation Site /
Chatham Co./ SAW-2018-01160/ NCDMS Project # 100059
Mr. Tim Baumgartner
North Carolina Division of Mitigation Services
1652 Mail Service Center
Raleigh, NC 27699-1652
Dear Mr. Baumgartner:
The purpose of this letter is to provide the North Carolina Division of Mitigation Services
(NCDMS) with all comments generated by the North Carolina Interagency Review Team
(NCIRT) during the 30-day comment period for the Hip Bone Creek Draft Mitigation Plan, which
closed on January 15, 2020. These comments are attached for your review.
Based on our review of these comments, we have determined that no major concerns
have been identified with the Draft Mitigation Plan, which is considered approved with this
correspondence. However, several minor issues were identified, as described in the attached
comment memo, which must be addressed in the Final Mitigation Plan.
The Final Mitigation Plan is to be submitted with the Preconstruction Notification (PCN)
Application for Nationwide permit approval of the project along with a copy of this letter. Issues
identified above must be addressed in the Final Mitigation Plan. All changes made to the Final
Mitigation Plan should be summarized in an errata sheet included at the beginning of the
document. If it is determined that the project does not require a Department of the Army permit,
you must still provide a copy of the Final Mitigation Plan, along with a copy of this letter, to the
appropriate USACE field office at least 30 days in advance of beginning construction of the
project. Please note that this approval does not preclude the inclusion of permit conditions in
the permit authorization for the project, particularly if issues mentioned above are not
satisfactorily addressed. Additionally, this letter provides initial approval for the Mitigation Plan,
but this does not guarantee that the project will generate the requested amount of mitigation
credit. As you are aware, unforeseen issues may arise during construction or monitoring of the
project that may require maintenance or reconstruction that may lead to reduced credit.

Thank you for your prompt attention to this matter, and if you have any questions
regarding this letter, the mitigation plan review process, or the requirements of the Mitigation
Rule, please call me at 919-554-4884, ext 60.
Sincerely,
Digitally signed by
BROWN ING.KIMBERLY. BROWN ING.KIMBERLY.DANIELLE.152
DANIELLE.1527683510 7683510
Date: 2020.02.14 12:01:29-05'00'
Kim Browning
Mitigation Project Manager
for Tyler Crumbley
Enclosures
Electronic Copies Furnished:
NCIRT Distribution List
Lindsay Crocker, Jeremiah Dow—NCDMS
Tim Morris—KCI

DEPARTMENT OF THE ARMY
WILMINGTON DISTRICT, CORPS OF ENGINEERS
69 DARLINGTON AVENUE
WILMINGTON, NORTH CAROLINA 28403-1343
REPLY TO
ATTENTION OF:
CESAW-RG/Browning
MEMORANDUM FOR RECORD
January 30, 2020
SUBJECT: Hip Bone Creek Restoration Site - NCIRT Comments during 30-day Mitigation Plan
Review
PURPOSE: The comments listed below were received during 30-day comment period in accordance
with Section 332.8(g) of the 2008 Mitigation Rule in response to the Notice of NCDMS Mitigation Plan
Review.
NCDMS Project Name: Hip Bone Creek Restoration Site, Chatham County, NC
USACE AID#: SAW-2018-01160
NCDMS #: 100059
30-Day Comment Deadline: January 15, 2020
DWR Comments, Mac Haupt & Erin Davis:
1. Page 6, Section 3.1 — In addition to identifying the streams as headwater systems, it's important
to note their origins as downstream of farm ponds.
2. Page 8, Section 3.1.2
a. It would be helpful see property boundaries in the vicinity of the project. Could a tax parcel
layer please be added to Figure 2 or a zoomed out Figure 5?
b. What are the anticipated future land uses for the project watershed?
c. Please include a discussion of existing vegetation within the project site, in particular the
species composition of the forested areas along the upper T1 and T3 wetlands.
d. Please discuss any site constraints (e.g. existing utilities, existing crossings/paths). Are
the existing stream crossings fords or culverts? Does the electrical line crossing the top
of T3 have an associated easement?
3. Page 12, Section 3.1.3
a. Besides Chinese privet, what other invasives have been documented on site?
b. In this section T2 is identified as a linear wetland; however, the JD lists it as a 368 linear
foot non -wetland water. Please confirm this feature type.
c. Please include a table or brief discussion of the NC SAM, NC WAM and DWQ Stream Id
form results.
d. Side note, it was confusing having the appendices referred to as sections within the plan
narrative.
4. Page 18, Section 4.0 — Please state what assessment method was used to determine that "all
stream channels have low functional values".
5. Page 20, Section 6.0 — It would be helpful to have the information in paragraph two stated earlier
in the document, perhaps in the Introduction.

6. Page 20, Section 6.1 - Flow is a general concern for this project. In particular, whether flow will
be sustained in the upper 300-foot section of T1 Reach 1 that is proposed to be raised 1-2 feet.
7. Page 20, Section 6.1 — Since establishment of vegetative cover and vigor can be a challenge on
Priority 2 restoration banks/benches, please include a discussion on how the soil restoration will
be addressed during construction and reference potential adaptive management.
8. Page 21, Section 6.2 — In order to justify a 2.5:1 ratio, please include bank grading in list
proposed work (as noted on Design Sheet 9).
9. Page 21, Section 6.3 — Given that multiple wetland restoration areas abut the proposed
conservation easement boundary, is there a concern about hydrologic trespass?
10. Page 21, Section 6.4 — The number of crossings for the project size is concerning. Fragmentation
impacts the potential functional uplift.
a. Four of the five crossings are proposed to be 30 feet wide. However, the lower T1 crossing
is proposed to be 60 feet wide. Can this crossing width be reduced to 30 feet? If not,
please explain why.
b. The T3 crossing is located approximately 150 feet north of the proposed conservation
easement boundary. Can this crossing be relocated south of the easement boundary? If
not, please explain why.
c. Will the proposed crossings be gated and/or will the proposed fencing overlap the culvert
to limit livestock access to the stream?
11. Page 23, Section 6.6 — Sheets 3 and 4 Details for proposed riffle enhancement, riffle grade
control, and stabilized rock outlet differ from text included in this Section. The details have 30%
native stream material while the text states 10%. The details do not include class 1 stone while
the text does. Please make text and details consistent.
12. Page 26, Section 6.8
a. Please include native seed mix composition (species, quantity, wetland status).
b. Please identify target communities.
13. Page 30, Vegetation Performance — Note that only volunteer species that are included on the
approved mitigation plan plant list may count toward the vegetation performance standard.
14. Page 30, Stream Hydrologic Performance — Please rephrase: The project streams must also
show a minimum 30 days' continuous flow days within each calendar year.
15. Page 31, Section 8 — For installed gauges and wells, DWR recommends quarterly data download
and inspection to reduce the risk of data loss due to instrument malfunction.
16. Page 31, Vegetation Monitoring — Currently there are no wetland gauges or veg plots located
within any of the proposed wetland rehabilitation areas or wetland enhancement areas to
illustrate functional uplift. DWR requests two additional wetland gauges be located within
proposed rehabilitation areas. Also, DWR would like to see at least two of the random veg plots
be located annually within the proposed wetland rehabilitation planting areas or enhancement
supplemental planting areas.
17. Page 32, Visual Assessment — Please include photo locations at all crossings.
18. Please add a Maintenance Plan as a new section or appendix summarizing the types of issues
that may arise during monitoring and how those issues would be addressed, including invasive
species treatment. DWR recommends a minimum annual treatment of Chinese privet.
19. Figure 9 — The flow documentation stations on T3 and T1 are very close to the stream reach
start points. DWR requests these stations be shifted north approximately 50-75 feet.
20. Sheet 1 — The Sheet 1 table does not match the Table 11 values under the Existing
Footage/Acreage and Mitigation Credits columns. Please update.
21. Sheet 2 — Please add buried log sill and buried brush material icons to the project legend, as
well as detail sheets.
22.Sheet 3 — DWR appreciated the riffle grade control note to include woody debris to enhance
habitat.
23. Sheet 4 — Please add a culvert crossing detail.

24. Sheet 4 — Please confirm that the water quality treatment area will be self-sustaining and requires
no long term maintenance. Also, will this treatment area be seeded and planted?
25. Sheet 4 — The Project Legend includes channel filling. Please include a channel fill detail. If
partial filling is proposed, please indicate the maximum depth from top of bank to be filled. Also,
the plan narrative references "plugging surface ditches". Please confirm whether ditches will be
plugged. If plugs are proposed, please include a detail identifying the minimum plug width (DWR
recommends a minimum of 50 feet) and whether a restrictive material core will be used.
26. Sheet 9 — Please show floodplain grading extents associated with notes along T3 and T3-1.
27. Sheet 13 — Please show a wetland planting zone and include seed mix information.
28. Sheet 13 — What does "per design representative guidance" refer to?
29. Sheets 15 & 16 — Please show anticipated gate locations.
30. For future site submittals, please show the plan view and corresponding profile on the same
design sheet.
31.Append ix/Section 12.2 Soil delineation and Borings - The title reflects that a hydric soil
delineation was completed, please show these boundaries on the included figure. While
sufficient representative boring logs were submitted, it's assumed that additional sample points
were taken in the field to delineate the hydric soil boundaries (i.e. more than one sample point
per wetland area). In the future please, show all sample point locations on the associated soil
report figure.
32.Append ix/Section 12.2 Groundwater Data — Please shift labels to align with corresponding lines.
USACE Comments, Kim Browning:
1. The correct USACE Action ID is SAW-2018-01160. Please correct the cover page.
2. General Plan Comments:
a. Please include a maintenance section with monitoring. For example, crossings, fence,
invasives... and who will be responsible.
b. This mitigation plan seemed to differ from the NCDMS template, and was difficult to
follow at times. Also, the appendices were included as Section 12, which was confusing.
3. When submitting the PCN, please include an estimate of the number of trees, or acres, to be
cleared for the NLEB 4(d) Rule.
4. Please label wetlands on Figures 8 and 9 to match the JD map. The asset tables should
correspond to these labeled areas.
5. Table 4 and Page 21: Please describe the level of microtopography in regards to surface
ponding.
6. Page 18, last paragraph: "The consideration of future impacts to the areas that could limit
functional uplift opportunities..." Please explain what considerations were given, such as utility
installation through the easement, crossing failures, adjacent land development, pond dam
breeches, etc.
7. Page 21: In wetland rehabilitation areas, if hydrology and vegetation are proposed to be
enhanced, functional uplift should be demonstrated by additional gauges and veg plots.
Additionally, wetland enhancement areas should demonstrate functional uplift. Removal of
debris and invasive treatment is expected on all reaches, so perhaps a discussion of the NCSAM
functional assessment rating as LOW for habitat might be justification.
8. Page 26: Please list herbaceous seed mix and address how fescue will be treated/removed.
9. Section 7.0-Vegetation Performance: Please add 320 steams/acre for monitoring year 3.
a. Volunteers may only count towards success if they are in the approved planting plan.
10. Section 8-Veg Monitoring: Please add veg plots to wetland rehabilitation areas (random plots
are fine).

11. Wetland rehabilitation/reestablishment—It would be beneficial to add some coarse woody
debris to the depressional areas and throughout the wetland for habitat, and to help store
sediment, increase water storage/infiltration, and absorb water energy during overbank events.
12. Page 32: Wetland hydrologic monitoring: Please add wells to all wetlands that propose
hydrologic uplift and update Table 14 as necessary.
13. Page 32: Please depict fixed photo points on Figure 9.
14. Please include the approved map for the PJD.
Digitally signed by
BROWNING•KIMBERLY• BROWN INGXIMBERLY.DANIELLE
DAN I ELLE.1527683510.1527683510
Date: 2020.01.30 16:01:03-05'00'
Kim Browning
Mitigation Project Manager
Regulatory Division