20090204 Ver 1_More Info Letter_20090611

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NCDENR
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Division of Water Quality
Coleen H. Sullins
Director
Dee Freeman
Secretary
June 11, 2009
Western Carolina University
Wiley Harris, Director of Facilities Planning Design and Construction
3476 Old Cullowhee Rd
Cullowhee, NC 28723
Subject: Request for More Information
401 Water Quality Certification
Millennial Initiative Project
DWQ Project # 09-0204
Jackson County
Response deadline: July 13, 2009
REQUEST FOR MORE INFORMATION
Dear Mr. Harris:
The Division of Water Quality (DWQ) has performed a preliminary review of a 401 Water Quality Certification
application (and subsequent revision dated May 5, 2009) submitted for the above referenced property.
Additional information will again be required in order to complete the review process.
Please provide the following information so that we may continue to review your project.
Additional Information Requested:
1. Please address the following issues with the design of the sand filters:
a. Volume in excess of the design volume must bypass the sand filter (i.e., the sand filter should
have a splitter device so that the first inch of rainfall is captured for treatment).
b. These systems require under drains. The under drains should be designed in accordance with
Section 5.7 of the DWQ BMP Manual.
c. Show the boundaries of the recorded drainage easement on the plan sheets.
Location: 2090 U.S. Highway 70, Swannanoa, North Carolina 28778
Phone: [phone] FAX: [phone] V Customer Service: 1-877-623-6748
Internet: www.ncwaterquality.org
An Equal Opportunity Affirmative Action Employer
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WCU
DWQ#09-0204
Page 2 of 3
2. Please address the following issues with the design of the bioretention cell:
a. Consider organizing the plan sheets so that the information for the bioretention cell (plans,
profiles and planting plan) can be found conveniently on consecutive plan sheets.
b. Plants should not be backfilled with engineered soil that has been amended with compost
(approved media should be used; in addition, compost may hinder nutrient uptake).
c. Imported top soil should not be placed on top of plantings.
d. Provide watering specifications to establish the vegetation.
e. Explain how the berm that conveys flow from the building into the bioretention cell will be
stabilized to prevent erosion (currently the slope is approximately 20 percent in this swale).
f. Space the underdrains such that they provide more even coverage for the bottom of the
bioretention cell.
g. Show the boundaries of the recorded drainage easement on the plan sheets.
Please provide your response in writing to the addresses below prior to July 13, 2009. Four copies of the
required information should be provided to the 401 Permitting Unit at:
Ms. Cyndi Karoly
401 Permitting Unit
1650 Mail Service Center
Raleigh, NC 27699-1650
and a single copy to the Asheville Regional Office at:
Ms. Susan A. Wilson
Surface Water Protection Section
2090 US HWY 70
Swannanoa, NC 28778
If we do not hear from you by the deadline, we will assume that you no longer want to pursue this project and
we will consider the project withdrawn.
WCU
D W Q# 09-0204
Page 3 of 3
This letter only addresses the preliminary application review and does not authorize any impacts to wetlands,
waters or protected buffers. Please be aware that any impacts requested within your application are not
authorized (at this time) by the DWQ. Please call Ms. Susan A. Wilson at [phone] or Ms. Annette
Lucas (919) 715 - 3425, if you have further questions.
Sincerely,

Roger C. Edwards
Regional Office Supervisor
Surface Water Protection Section
cc: US Army Corps of Engineers Asheville Field Office
David McHenry - North Carolina Wildlife Resources Commission
Cyndi Karoly - 401 Permitting Unit
Jackson County Planning
ARO File copy
Central Files
Mulkey Inc.-Cindy Carr/Warren Sugg
PO Box 33127
Raleigh, NC 27636-3127
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