20140770 Ver 1_More Info Letter_20140903

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NCDENR }(
North Carolina Department of Environment and Natural Resou ces
Pat McCrory
Governor
September 2, 2014
Adam King
Harley Enterprises, LLC
1249 Hendersonville Road
Asheville, NC 28803
Subject: Request for Additional Information
Beaverdam Road
Dear Mr. King:
John E. Skvarla, III
Secretary
DWQ Project # 14 -0770
Haywood County
The Division of Water Resources (Division) has performed a preliminary review of a 401 Water Quality
Certification application submitted for the above referenced project. The Division has determined that your
application is incomplete and cannot be processed.
Division staff have been trying to determine if the stormwater management plans received by the Division of
Water Resources on July 23, 2014, and modified by two PDF files submitted on August 23, 2014, will be
sufficient to meet the Division of Water Resources' stormwater management requirements. Although the site's
stormwater treatment concept may work to provide adequate collection and treatment, there are many
deficiencies in the plans submitted and the staff is unable to effectively evaluate how and if it will function.
Our staff engineer, Boyd DeVane, talked to Ms. Austin on August 22nd and tried to describe the deficiencies
that he observed. Unfortunately, many of the issues he described were not corrected on the revised plan
.received the next day.
Therefore, the application is on -hold until all of the following information is received:
1. The major issue that prevents a review of the plan is that the flow of all water on the site cannot be
determined by the original plans nor the revisions received on August 23, 2014.
2. As noted in Mr. DeVane's conversation with Ms. Austin, the inconsistencies between the LEGEND and
the drawing lead to questions and delays in the staff's review. The newer "Culvert Permit Plan"
drawing (also dated June 26) has some changed symbols but they are still inconsistent with the drawing.
For example, the new contours are supposedly to be done in red. There are many red lines on the
drawing but none of them are contours. The existing contours are shown on the legend as being in
black. However, they all seem to be in blue.
3. Mr. DeVane specifically asked that all drainage areas on the site be marked so as to be readily observed.
We still do not see any drainage area markings. We see a "Drainage Areal" label but cannot tell what
area is that drainage area. From the calculations, there seems to be a drainage area 2. We could find no
Water Quality Regional Operations— Asheville Regional Office
2090 U.S. Highway 70, Swannanoa, North Carolina 28778
Phone: 828 - 2964500 FAX: 828 - 299 -7043
Internet: http:llportal.ncdenr.org /web /wq
An Equal Opportunity 1 Affirmative Action Employer

Adam King
September 2, 2014
Page 2 of 3
indication of where that area might be. This is a required item on our "checklist" and without it, we
cannot assure that the percent impervious area and stormwater volume calculations are done correctly.
4. Please show on the drawing which areas are part of Phase I and which are part of Phase II. The
statement provided with the PCN indicates that "Phase II will extend the roadway 1850' to the eastern
end of the property." From the drawing, we cannot tell where that 1850' extension starts.
5. It's difficult to tell where the Beaverdam Road presently exists or is proposed. Some parts of the
submittal seem to show an existing road across all of the property. However, the existing and the
proposed contour lines don't indicate a road.
6. The proposed contour lines for the site are not sufficient to enable an understanding of the flows,
especially west of the new road leading to the cul -de -sac. In this area, where they are needed the most,
they are shown at four or six feet intervals. In the generally flat proposed area, contour lines of 1.0' or,
at a minimum, 2' are needed to determine where stormwater will flow.
7. It is unclear how the flow of stormwater near station 3 +00 will transition from the "grass -line ditch" to
the "special sediment ditch." Does all of the stormwater from the "borrow source" area flow into the
ditch and bypass the site? Will any of it flow in a manner around the cul -de -sac? Elevations would help
us understand the drawing. More detail is needed.
8. From the absence of elevation and details about the overflow ditch and weir, we can only guess at the
direction of flow. This is one device that Mr. Devane specifically asked for flow direction indicators.
Also, without elevations, it is impossible for us to determine how and under what conditions the
stormwater exceeding the design flow will enter the bypass ditch. The 3'x8' berm indicated on the
"Culvert Permit Plan" drawing is not shown on the cross section of the `By -Pass Flow Ditch." Please
show that device on the drawing and provide elevations. Also, explain how it will function to accept
only the design flow excess. Please identify the device on the left -hand side of that ditch and explain
how it will function. We couldn't tell if it was a ditch or a berm.
9. On the Stormwater Plan drawing, please provide an explanation of the device represented by a solid,
one -half inch dark line at the lower, left hand corner of the basin area near the 2640 elevation contour. It
looks like a culvert.
10. There is an "Existing Gas Line" running perpendicular to the detention basin. What is the dashed,
parallel line, below it?
11. When the stormwater stations are discussed, please explain which road or device they reference. Also,
we did not see stations 4 and 5 as was referenced in the PCN.
12. What is the dashed line below the "Existing Water Line" southwest of the Beaverdam Road? Is it a
ditch?
13. The flow arrows to the east of the bypass ditch are going in a southerly direction. The 2644 contour line
would seem to direct flows to the North. What would keep flows from exiting that flat area and flowing
to the "Special Sediment Ditch ?"
14. Please show elevations and flow directions for all areas around the proposed 10,000 sf building and
parking lots. Where does the water from the areas with green symbols go? We assume the green
symbols are "existing seeded area" but can't verify that from the legend. Some are small and some are
large. Is there a difference in what they represent? The legend symbol for "drainage area" is very
similar.
15. It seems that the elevation behind the detention basin has been dropped four feet from the original plan.
Please explain the reason for that change. Also, the newer drawing shows the elevation of the basin at
2641. Will the entire vegetated filter strip adjacent to the basin be graded so that water will flow into the

Adam King
September 2, 2014
Page 3 of 3
basin along its right -had edge or will the stormwater flow in at a concentrated location? If the basin is
one foot higher than the sloped area to its left side, will that one foot berm be wide enough to withstand
the overflow?
16. Please show the direction of flow from the 5,000 sf building and parking area. Also show the direction
of flow from the adjacent cul -de -sac and road leading to that cul -de -sac. Road elevations will help.
17. What is the flow direction (and elevation) of the proposed 18" culvert connected to the "Rock Vane
Drain."
If all of the requested information is not received in writing within 30 calendar days of receipt of this letter, the
Division will be unable to approve the application and it will be returned. The return of this project will
necessitate reapplication to the Division for approval, including a complete application package and the
appropriate fee.
Please respond in writing within 30 calendar days of receipt of this letter by sending four (4) copies of all of the
above requested information to the 401 & Buffer Permitting Unit:
401 and Buffer Permitting Unit
1650 Mail Service Center
Raleigh, NC 27699 -1650
Please be aware.that you have no authorization under the Section 401 of the Clean Water Act for this activity
and any work done within waters of the state may be a violation of North Carolina General Statutes and
Administrative Code. Please contact Chuck Cranford 828 - 296 -4650 or chuck. cranford a,ncdenr.gov , if you
have any general questions and Boyd Devane at 919 - 807 -6373 or boyd.devane c(r�ncdenr.gov with questions
specific to the stormwater management plan.
Sincerely,
G. Landon Davidson, P.G., Regional Supervisor
Water Quality Regional Operations
Asheville Regional Office
cc: DWR ARO 401 files
DWR 401 & Buffer Permitting Unit
ec: Wanda Austin — wandajoyceaustinna�mail.com
David Brown - USACE
G: \WR \WQ \Haywood \401s\Non- DOT\Beaverdam Road\AddInfo.9.2.14.docx