20140770 Ver 1_More Info Received_20150427

DocuSign Envelope ID 096EAEE5- 8379- 400C- 9CF5- A71 F07CE72E5
Wanda H. Austin, PE
Engineering Services
45 Homespun Road (828) 342 -5079
Sylva, NC 28779 (828) 508 -2639
April 21, 2015
Mr Landon Davidson, Regional Supervisor
Water Quality Regional Operations
401 and Buffer Permitting Unit
1650 Mail Service Center
Raleigh, NC 27699 -1650
RE DWQ Project # 14 -0770
Dear Mr Davidson
0
Thank you for your review of the 401 permit application for Harley Enterprises, LLC I regret the
information submitted on February 10, 2015 did not address all your concerns
I will address the question contained in the letter dated March 27, 2015 separately below
Question 1 Low Density Design
The intent is for the project to be reviewed as low density The level spreader and dry pond were left on
the plan to provide additional protection These items are not necessary for the low density design and
therefore have been removed Since the above feature details were on sheet 1, the revised plans
submitted with this letter do not include this sheet
Question 2
2a) Clarify the drainage areas
The plans have been modified to include different patterns for each of the six drainage areas I have
also included a sheet 3 titled overall plan sheet This should clarify the boundary between phase 1 and
phase 2 as well as delineate the individual drainage areas
2b) Impervious percentage
The table on sheet SW2 contains the impervious percentages. In this table, the total property area is
1,166,536 sf. From advice from Mr DeVane, the calculations were revised to include the entire property
area Storm water will be address in phase 2 as leases are signed with tenants At this time, phase 2 has
not been subdivided into lots or graded. The stormwater in this section sheet flows over the pasture
land to the unnamed tributary.
2c)
A detail has been added as Permit Sheet 3 to view the overall project with phase 1 /phase 2 and drainage
area delineation

DocuSign Envelope ID 096EAEE5- 8379- 400C- 9CF5- A71 F07CE72E5
Harley Enterprises 2
2d) Property lines
The line type for the property lines has been modified. The lines parallel to Beaverdam Road Indicate
the right of way along said road
Question 3
As Indicated above, the drainage area delineation has been modified to provide separate patterns for
each drainage area The total property area owned by Harley Enterprises is 1,166,536 sf The original
culvert plan and PCN only covered phase 1 Since the submittal of the PCN, the plan was modified to
include the entire property, phase land phase 2 Phase 2 is currently undeveloped The three swales
cover the low density drainage requirements of the current proposed buildings of phase 1 The
remaining square footage in question is contained in the undeveloped phase 2. The area of drainage 6 is
19 7 acres, of which 16 acres is included In phase 1 and 18 1 acres In phase 2 The plan has been
corrected to accurately reflect the total drainage area of 19.7 acres in drainage area #6 The 43,287 sf
included in equation b) on the Low Density Supplement did not Include roads as allowed in equation a)
on page 2 of the Low Density Supplement I could not find directions on how to complete this portion of
the form. If the above assumption Is not correct, please provide me with the location of a reference
manual
Question 4
A more efficient design may be possible, however, the current plan follows the minimum guidelines.
Question 5
The high density features have been removed.
Once again, thank you for your review of the 401 storm water plan. Let me know If you need any
additional Information
Sincerely,
tFB� d by
(3
W Austin, PE