19960722 Ver 1_Fax_19990813

08/12/1999 20:47 8565855
t.

WAKE COUNTY
ENGINEERING
Department of Environmental Services
Erosion, Flood and Stormwater Services
[phone] PAX: [phone] PO Box 550, Raleigh, NC 27602
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To protect and improve the quality of Wake County's environment and ensure a healthy future
for its citizens through cooperation, education, management and enforcement
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08/12/1999 20:47 8565855 ENGINEERING PAGE 02
WAKE COUNTY
Department of Environmental Services
Erosion, Flood and Stormwater Services
[phone] FAX: [phone] PO gox 550, Raleigh, NC 27602
08/13/99
Arland Community Development
3211 Bramer Drive, Suite F-
Raleigh, N C 27602
Phone #: 9I9/872-3525
Fax #: 9191 -
ATIN: John Meyers
RE: Letter of Disapproval
Project Name, Eagle Ridge Stream, Relocation Submitted By: John R McAdams Co any
Project #: 99-0107 P O Box 14005
Date Received: 6-28-99
Date Processing Initiated. 7-14-99
Disturbed Acres: 0 Watershed: Neuse 03-04-02 Research Triangle Park
Phone #: [phone] Fax #: [phone]
Submittal Revision ?
flan Review Fee: $0.00
band Disturbance Fee: Pending
Dear Mr. Meyers:
The Erosion and Sedimentation Control Plan submitted for the subject project has been reviewed by this
office- Based upon a thorough review of the submitted plans and supporting materials, we find the plan as
submitted to be unacceptable and said plan is hereby disapproved by the authority grated to this office by North
Carolina General Assembly through Chapter 392 of the Sessions Laws of North Carolina, 1973 (hereinafter refer as
Erosion and Sedimentation Control Ordinance of Wake County). The reasons for disapproval of the submitted plan
and any recommendations are listed and explained on the enclosed form which is incorporated as a part of this letter
of disapproval.
You may submit a Revised Erosion and Sedimentation Control plan for approval covering those items as
outlined on the enclosed form Under the authority of Erosion and Sedimentation Control Ordinance, this office has
1.5 days from the date of receipt to approve or disapprove your revised plan. However, if you wish to contest the
disapproval of this plan, you must request an administrative hearing within 15 days of your receipt of this Letter of
Disapproval. This request must be in the foram of a written demand, conforming to the requirements of A9glg
Section 11(1) of the Ordinance. A copy of the petition must be served on this Division and to the Director of the
Department of Environmental Services.
Reasons for Disapproval:
First let me tell you that I was impressed with the detailed design packet submitued with your last submission
and after reviewing the new calculations we can accept the use of temporary matting. There are still some issues that
To protect and improve the quality of Wake County's environment and ensure a healthy future
for its citizens through cooperation, education, management and enforcement
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08/12/1999 20:47 8565855 ENGINEERING PAGE 03
need to be addressed. There are some design elements that we are unwilling to accept and there are others that need
to be spelled out in more detail. I want to make sure your design intentions are understood by the contractor.
(1.) The design specifications for your channel relocation still show side slopes that are not acceptable (1.5:1).
For all practical purposes this will be a grassed channel with temporary liner until the selected bank vegetation
forms a stable root mass. We can accept no less than 2:1 side slopes even,with a vegetative cover of shrubs and
vines.
(2.) In the last review it was stated that the 2:1 side slopes would be allowed only if you show stable vegetation
that was slope adapted. You have provided a list of plants to be used, which does not sufficiently describe the
process. I will need to see a detailed planting plan, describing type of vegetation, spacing (density) of plants in each
zone, and installation method to be used. I would like this broken down into zones (stream bottom, mean low water,
mean water level and mean high water). There needs to be details and or instructions on how the planting will be
installed in the matting in order not to undermine the integrity of the matting. I am especially concerned about what
is refered to in the N.C. Sediment and Erosion Control Design Manual Section (6.72)(attached) as tho "reed bank
zone" and how the installation of the type vegetation to be used (rushes,reed grasses, cattails, etc.) will affect the
stablity of the texmpoary matting in the stream bottom.
(3.) Another issue is the use of rye grass in the hydro seeding mixture. While rye grass does gerrainate quickly it
is too competative when mixed with other grasses and hurts more than, it helps. Please remove rye grass from the
mixture.
(4.) I would still like a note on the plat} as follows NO'T'E; The water from the existing channel is not to be
diverted into the new channel until vegetation in the new channel is stable and only at the direction of bake County
Environmental Engineer/Planner.
Pending approval of a revised plan or a decision on an appeal, commencement or continuation of any land-
disturbing activity associated with this project will constitute a violation of the Sedimentation and Erosion Control
Ordinance of Wake County.
Please feel free to contact this office at your convenience if you have any questions or if we can provide
any assistance in resolving this matter.
Sincerely,
W. Jake or
End ental Engineer/Planner I
cc: Scott Mitchell, John R. McAdams Company, Designer
John Dorney, NC Division of Water Quality