SW6230805_Response To Comments_20231218

4006 Barrett Drive,Suite 104
ovvrrian Raleigh,North Carolina,27609
TEL [phone]
Project: Turnberry South Phase 1
Location:Royal Birkdale Drive,Raeford,Hoke County
Jurisdiction:NCDEQ
Date: 11/21/2023
Subject: SW 6230805 Comments
Application Comments Response
The Application Section IV,the Supplement-EZ,Cover Page,and narrative ✓ There is no surface water on this project. The data
reference 0.122 acres of surface water area,but no surface water area and sheets have ben updated to remove this.
associated vegetated setbacks were delineated on site in the main set of plans.
Please ensure that all surface water(.1042(2)(g)(iii))and the required
vegetated setback(.1003(4)&.1017(10))is clearly shown on the plans
(.1042(2)(g)(iii)).
Offsite Area Comments Response
The storm drainage area boundary delineated on Sheet C-10 includes offsite ✓ A legal agreement limiting the amount of BUA and
area directed to the SCM.It appears this area is intended to be a future phase drainage area directed from the offsite property to the
of the subdivision,but per Hoke County GIS the property is currently owned SCM is included in the application,signed by the
by another entity.Per 15A NCAC 02H.1003(3)(b)any offsite areas that drain current property owners of the parcel.
to the SCM must be accounted for at their full build-out potential.This can be
accomplished by having the property owners enter into a legal agreement
limiting the amount of BUA and drainage area directed from the offsite
property to the SCM or by assuming that the offsite area is 100%BUA(its
full build-out potential).Bypassing offsite drainage area around the SCM is
recommended.If the offsite area is not bypassed,or a legal agreement
reached,please revise the calculations, Supplement-EZ,and Application
accounting for the offsite area as 100%BUA.If a legal agreement to limit the
BUA and treat the offsite area is reached,revise the Application and
Supplement-EZ to account for this off-site area.
The offsite area discussed in the above comment is not clearly shown on ✓ Sheet C-1 has been revised to include the SCM future
Sheet C-1.Please include the parcel boundaries for the off-site area treated in boundary area that will be included in the next phase.
the SCM,so that it can be determined if it is only PIN 494550301299,or if
PIN 494550301003 is also included.
Plan Comments Response

4006 Barrett Drive,Suite 104
ovvrrian Raleigh,North Carolina,27609
TEL [phone]
2x hard copies of revised sheets of the Application with the following V The scale for the SCM details was enlarged to 1"=30'.
corrections made:(This item is required per 15A NCAC 02H.1042(2)(a)and
per Section VI, 1 of the Application)
Wet Pond—The scale for the plan view provided on Sheet SCM-1 is listed as
1 inch=0 ft.Per 15A NCAC 02H.1042(2)(h),details must be shown at as
scale of 1 inch=30 ft or larger.
General MDCs 8&9 V The SCM easement is at least loft wide and the slopes
i.Wet Pond—It is noted that the maintenance access/easement is shown on are 3:1 to access any part of the SCM.
the plans,however,this easement should be at least 10 ft wide(8a),must not
include any slopes steeper than 3:1 (8b),and should extend to the nearest
public right-ofway(8c).The entire SCM(side slopes,forebay,riser structure,
SCM,dam embankment,outlet,and emergency spillway,etc...)plus an
additional 10 or more ft(25 ft is recommended for wet ponds)around the
SCM should be included in the easement. See guidance under MDC 9 in Part
C-0 of the Manual. The wall presents a maintenance accessibility concern.
Bioretention Cell—Please show the extension of the easement to the nearest V The viewport of the plan view was extended to include
public right-of-way. the easement connecting to the right-of-way.
Wet Pond—Per Wet Pond MDC 4: The inlet(s)and outlet shall be located in a V The wet pond was re-oriented to prevent short
manner that avoids short circuiting.As designed,the wet pond appears to circuiting.
shortcircuit.The flow path from the inlet to the outlet/drawdown orifice
appears to be too short,please increase the flow path by either relocating the
outlet structure so that it is further away from the inlet/forebay or add
berms/baffles to the design as to better maximize the flow path through the
wet pond.
Wet Pond—Per Wet Pond MDC 6: The main pool shall be equipped with a V The vegetated shelf is 6ft wide with a slope of 6:1.
vegetative shelf around its perimeter.The minimum width of the vegetated
shelf shall be six feet and the slope shall be no steeper than 6:1.Please revise
so that the vegetated shelf meets this requirement.

4006 Barrett Drive,Suite 104
ovvrrian Raleigh,North Carolina,27609
TEL [phone]
Wet Pond—The plan view detail of the wet pond has a note to"sod areas ✓ Note updated to"Sod areas above vegetative shelf,
above normal pool elevation."The permanent pool elevation is 277 ft,and the elevation=227.5."The shelf plantings are listed in a
top of the vegetated shelf is 227.5 ft.The vegetated shelf should be planted table on sheet SCM-1.
with the specified vegetated species instead of sod,per Wet Pond MDC 11.
Calculations Comments Response
lx signed,sealed,and dated hard copy of calculations with the following ✓ The rip rap dissipators for the outlets of the SCM's are
corrections made:(This item is required per Section VI,7 of the Application) included in Bowman's calculations. The rip rap
dissipators for the inlet into the SCM's are separate.
The provided calculations only included riprap sizing for the outlet of the The Calculations are attached.
SCMs.Per 15A NCAC 02H.1050(4),provide calculations showing the inlets
of the SCMs are protected from stormwater discharges.
Supplement-EZ Comments Response
lx hard copy of the complete,original Supplement-EZ Form and lx hard ✓ The actual temporary ponding elevation is 220.6,so the
copy with the following corrections made: (This item is required per Sections supplement was updated to be 7.2 inches.
V&VI,3 of the Application)
Bioretention Cell—Line 20:This should be based on the actual temporary
ponding depth associated with the design volume(Based on the design storm
of 1.0 inches).
Bioretention Cell—Line 25:Per Bioretention MDC 3,the peak attenuation ✓ Pond enlarged so the peak attenuation is lowered to
outlet shall be a maximum of 18 inches above the planting surface. below 18 inches.
Bioretention Cell—Lines 34&35—There is an error in the Manual with ✓ The mix percentages were updated to match 15A
regard to the mix percentages.Please refer to 15A NCAC 02H NCAC 02H.1052(6)(b)&(c).
.1052(6)(b)&(c).
Bioretention Cell—Line 43:Riprap is a form of energy dissipation,not ✓ A forebay was added to the bioretention pond.
pretreatment.A forebay or grass and gravel combination are the most utilized
pretreatment methods.
O&M Form Comments Response

4006 Barrett Drive,Suite 104
ovvrrian Raleigh,North Carolina,27609
TEL [phone]
lx original,and lx hard copy signed&notarized hard copy of the O&M ✓ The elevations were corrected in the O&M Agreement.
Agreement Form(This item is required per 15A NCAC 02H.1042(2)(j)and
per Sections V&VI,3 of the Application).
Wet Pond—It appears that the forebay sediment removal elevation/bottom
elevation was filled out in the main pond column and vice versa.Please
revise.
Submission Comments Response
Provide PDFs of all revisions,2 hardcopies of revised plan sheets, 1 hardcopy ✓ Acknowledged.
of other documents,and a response to comments letter briefly describing how
the comments have been addressed. a.PDFs must be uploaded using the form
at:https://edocs.deq.nc.gov/Forms/SW-Supplemental-Upload b.Hard copies
must be mailed or delivered to the following address: i.For FedEx/UPS:
Brianna Holland 512 N. Salisbury Street,Office 640E Raleigh,NC 27604 ii.
For USPS:Brianna Holland 1612 Mail Service Center Raleigh,NC 27699-
1612 iii.Hand Delivery: Please reach out to me prior to hand delivering a
submission to make sure that I(or someone else in my group)will be able to
receive the submission.Do not leave the package in the foyer with the
security guard.NOTE:Hard copies should not be sent to a Regional Office.
Doing so will delay the review process and the submission package may be
lost while being sent from the Regional Office to me in the Central Office.
Recommended Comments Response
Ensure the north arrows are correctly oriented(Section VI,8.e),pages C-9, ✓ The north arrows have been updated.
and C-10 have misaligned north arrows.
It is strongly recommended to provide an emergency spillway to prevent ✓ Emergency spillway provided on both SCMs.
structure failure of the embankment structure during large storm events.
Given the location in a residential development(permanent pool of water ✓ The owner is planning on installing a fence but wants
presents an attractive play area to children),consider engineering design to wait until the ponds are done so his fence guy can
features that encourage safety. give an accurate bid.He has installed fences on most of
his ponds in the past and is anticipating this.