20161039 Ver 1_More Info Received_20170214

Homewood, Sue
From:Russ Willard <[e-mail]>
Sent:Tuesday, February 14, 2017 10:26 AM
To:Homewood, Sue
Cc:Pete Ramey; JIM ARMENTROUT; Gibby, Jean B CIV USARMY CESAW (US); Mark Anderson
Taylor
Subject:RAE's Creek at Oak Valley Stream Restoration Plan - Response to Comments
Attachments:Oak Valley Rae's Creek Lot Lines 35ft SB Site Plan.pdf; Oak Valley RAE's Creek Design
Narrative Issued 2-13-17.pdf

SUE:

Per your email comments of Feb. 7, 2017, please find the following:

A design narrative for the RAE’s Creek Stream Restoration Plan as prepared by


S&ME.
With respect to the lot fill slope encroachment into the stream buffer, the developer


will either adjust the slope fill angle such that the slope toe will not encroach into
the buffer area or construct a segmental retaining wall outside of the buffer to
ensure the buffer is not disturbed by the fill slope. The attached site plan illustrates
the surrounding features of the entire tract which, in turn, required lot layouts and

proposed building pads as noted on the plan.
The project area site plan illustrating the property line descriptions for each lot. The


plat for these lots has not yet been recorded.

Please let me know if have any questions or require additional information.

Thank you,

Russ Willard

For Oak Valley Associates Limited Partnership

336.655.7339

From: Homewood, Sue
Sent: Tuesday, February 07, 2017 12:23 PM
To: Russ Willard ; Mark Anderson Taylor
Cc: Pete Ramey ; JIM ARMENTROUT ; Gibby, Jean B CIV USARMY CESAW (US)
Subject: RE: RAE's Creek at Oak Valley Stream Restoration Plan

Russ and Mark,

I've reviewed the plans that were submitted for the RAES Creek restoration and have a couple questions:


Mark, can you provide a short narrative indicating what you used as a reference reach for the design please.


Russ, since a portion of the stream will have fill slope very close to the top of bank, would you provide an explanation of

how the two lot sizes were determined and if you've investigated any other options for reducing the fill slope at this
1

location. I understood that there was likely to be a different buffer vegetation proposal for that area but a fill slope close
to a stream bank is of more concern and wouldn't be something we would see in a stream restoration proposal.

Russ, from on line GIS mapping it appears that this area is still under ownership of Oak Valley Assoc. Have the two

proposed lots been subdivided? Would you please provide a map that shows the legal boundaries of these lots.

Thanks,

Sue Homewood
Division of Water Resources, Winston Salem Regional Office
Department of Environmental Quality

336 776 9693 office
336 813 1863 mobile
[e-mail]

450 W. Hanes Mill Rd, Suite 300
Winston Salem NC 27105

Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.

-----Original Message-----
From: Thomas, John T Jr CIV CESAW CESAD (US) \[mailto:[e-mail]\]
Sent: Thursday, January 05, 2017 8:48 AM
To: Homewood, Sue <[e-mail]>; Russ Willard <[e-mail]>
Cc: Pete Ramey <[e-mail]>; JIM ARMENTROUT <[e-mail]>; Mark Anderson Taylor
<[e-mail]>
Subject: RE: RAE's Creek at Oak Valley Stream Restoration Plan

Russ,

I concur with Sue's approval of extension. Thank you for keeping me inform and I look forward to completing the resolution of this
action in the next few weeks.

John Thomas
Raleigh Regulatory Field Office
919 554-4884 ext. 25

-----Original Message-----
From: Homewood, Sue \[mailto:[e-mail]\]
Sent: Thursday, January 05, 2017 8:36 AM
To: Russ Willard <[e-mail]>
Cc: Thomas, John T Jr CIV CESAW CESAD (US) <[e-mail]>; Pete Ramey <[e-mail]>; JIM
ARMENTROUT <[e-mail]>; Mark Anderson Taylor <[e-mail]>
Subject: \[EXTERNAL\] RE: RAE's Creek at Oak Valley Stream Restoration Plan

Russ,

2

•
February 13, 2017
Ramey, Inc.
P.O. Box 10
Bethania, NC 27010
Attention: Mr. Russ Willard
Reference: RAE's Creek Design Narrative
RAE's Creek Stream Restoration
Advance, North Carolina
S&ME Project No. 7235-16-021
NC PE Firm License No. F-0176
Dear Mr. Willard:
S&ME, Inc. (S&ME) is providing this design narrative for your use. The design narrative was requested by
Sue Homewood of the Winston Salem Regional Office of the NC Department of Environmental Quality,
Division of Water Resources (heretofore NCDWR) in response to the previously submitted Rae's Creek
Restoration plans developed by S&ME and dated January 20, 2017.
The project site is located on Oak Valley Boulevard west of a cul-de-sac on Aviara Drive in Advance, Davie
County, North Carolina. A new channel is being proposed to restore approximately 185 feet of channel
that was previously encapsulated.
❖ Design Approach
Baseline data for the existing stream were collected from two locations upstream and used to establish a
bankfull discharge for the proposed design. These locations were located approximately 1,700 and 2,300
feet upstream and to the northwest of the project site and were selected due to the established channel
features and minimal channel modifications. Data from each channel cross section was collected and an
upstream and downstream head of riffle was observed for determining the slope across the observed
cross section. Following collection of data from the existing stream channel, S&ME performed hydraulic
analysis of each riffle cross section. Using RiverMORPH° software, hydraulics by stage was calculated
utilizing Manning's equation for each of the existing riffle cross sections observed.
The drainage area was estimated using the online USGS StreamStats application for the observed cross
sections and the project site. After determining the watershed size, the channel dimension and discharge
values were compared to known published regional curve values in order to validate the observed values.
S&ME used regional curves to validate the bankfull discharge, area, width and mean depth. The regional
curve values were compared to the observed riffle cross section values in the table below. S&ME used the
published regional curves for the North Carolina Mountain and Piedmont, North Carolina Tennessee
(discharge), and Eastern US (area, mean depth, and width).
S&ME, Inc. 16515 Nightingale Lane I Knoxville, TN 379091 p 865.934.6023 1 f NA I www.smeinc.com

RAE's Creek Design Narrative
RAE's Creek Stream Restoration
Advance, North Carolina
S&ME Project No. 7235-16-021
Table 1 Regional Curve Values for Drainage Area of 0.34 Square Miles.
Regional Curve
Riffle Cross
Sectional
Area (ft2)
Width
(ft)
Mean
Depth
(ft)
Discharge
(ft3/sec)
Eastern US/*North Carolina and
Tennessee
10.34
9.44
1.09
*20
North Carolina Mountain and Piedmont
10.07
8.59
1.16
39
Existing Cross Section 1
10.41
9.96
1.04
24
Existing Cross Section 2
10.78
10.58
1.02
23
Note: * Discharge was derived from the North Carolina - Tennessee Regional curve as a discharge value for
the Eastern US curve is not available.
Following calibration of the bankfull discharge for the observed sections, the bankfull discharge was
established for the proposed stream reach at the project site. The bankfull discharge was determined by
scaling the difference between the regional curve values and the calculated values for the existing
sections and applying the scaling factor to the regional curve values observed for the project site's
drainage area. The slope was estimated based on the anticipated length of the proposed alignment at
the project site, and a new riffle cross section developed. Using RiverMORPH° software, hydraulics by
stages was calculated utilizing Manning's equation for the proposed riffle cross section. The regional
curve values and the proposed riffle cross section values area shown in the table below.
Table 2 Regional Curve Values for Drainage Area of 0.48 Square Miles.
Note: * Discharge was derived from the North Carolina - Tennessee Regional curve as a discharge value for
the Eastern US curve is not available.
Because of the short length of channel proposed to be restored, a site specific reference reach was not
identified and assessed for this project. Instead, S&ME used reference reach values collected from a
previous observed reference reach (Long Hope Creek) which is a C4 Rosgen Stream Type located in
Watauga County, North Carolina and has a similar slope as the proposed reach at the project site. The
reference reach values and the proposed design values used during the design process for the proposed
stream reach at the project site are attached.
February 13, 2017

•
Summary & Closure
RAE's Creek Design Narrative
RAE's Creek Stream Restoration
Advance, North Carolina
S&ME Project No. 7235-16-021
S&ME completed the stream restoration design plans for RAE'S Creek dated January 20, 2017 using a
natural channel design approach. The design discharge was established by evaluating cross sections of
the existing channel where impacts from the adjacent golf course and residential development were
minimal. The channel dimensions and discharges were validated using regional curves, and a new design
discharge was selected. A riffle cross section was developed for the proposed discharge and anticipated
slope.
Reference reach data from a C4 Rosgen stream type was used to further establish dimension, pattern, and
profile relationships for the proposed design. Because of the short reach of stream proposed for
restoration, some of the stream design values (Meander Length Ratio, Meander Width Ratio, and Pool to
Pool Spacing) fall outside of the reference reach ranges, but they are not anticipated to be a concern for
the long term stability of the stream. As vegetation matures and sediment moves through the stream, it is
expected that the stream channel will narrow over time through natural processes. The resulting values for
these ratios would increase and trend towards the values from the reference reach.
Please do not hesitate to contact us if you have any questions or need further information related to the
previously provided stream restoration plans or the design narrative detailed herein.
Sincerely,
S&ME, Inc.
Michael K. Pannell, CPESC
Staff Scientist
February 13, 2017
MAUAI�W-'
Mark A. Taylor, P.E.
Senior Engineer
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Parameter
Drainage (Sq. Mile)
Stream Type
Cross Sectional area
Bankful width
Bankful mean depth
Width/Depth ratio
Width of flood prone area
Entrenchment ratio
Bankful velocity
Bankful discharge
Max depth @ bankfull
Max depth ratio
Bank Heigh
Bank Height Ratio
Meander Length
Meander Length Ratio
Radius of Curvature
Radius of Curvature Ratio
Belt Width
Meander Width Ratio
Channel Slope
Riffle Length
Riffle Length Ratio
Pool max depth
Pool max depth Ratio
Pool area
Pool area ratio
Pool width
Pool width ratio
Pool -Pool spacing
Pool -Pool spacing ratio
RAE's Creek Stream Restoration
Advance, North Carolina
S&ME Project No. 7235-16-021
Natural Channel Design Values
Reference Reach Design
median min max median
2.2 0.48
24.80 8.54
16.30 9.0
1.50 0.85
min max
Abkf
22.7
27
Wbkf
16
16.6
Dbkf
1.4
1.6
Wbkf/Dbkf
10.40
11.40
Wfpa
160
245
Wfpa/Wbkf
9.80
15.00
Vbkf
15.56
11.74
4.00
Qbkf
2.70
107.00
Dmax
2.1
2.2
Dmax/Dbkf
1.40
1.50
Dtob
1.48
1.58
Dtob/Dmax
1.50
1.30
Lm
128
266
Lm/Wbkf
8.00
16.00
Rc
32.0
97.8
Rc/Wbkf
2.00
6.00
W blt
42
77
Wblt/Wbkf
2.60
4.70
Save
2.56
4.56
3.20
Lrif
15.00
7.6
81
Lrif/Wbkf
0.50
4.90
Dpool
2.30
2.50
Dpool/Dbkf
1.50
2.50
Apool
35.3
37.1
Apool/Abkf
1.40
1.50
Wpool
2.40
Wpool/Wbkf
0.90
1.15
P -P
68.3
127.4
P-P/Wbkf
4.20
7.80
Dimensionless Ratio
97.5 32.3 39.9 36.8
6.00 3.59 4.43 4.09
2/13/2017 S&ME. Inc.
10.90
10.56
203
65.00
140.00
105.67
12.40
7.22
15.56
11.74
4.00
2.70
107.00
33.00
2.15
1.26
1.35
1.30
1.45
1.48
1.58
1.53
1.50
1.30
1.30
1.30
1.00
1.03
0.96
1.00
196.00
65
75
70
12.00
6.84
7.87
7.76
64.90
23.0
41.0
28.8
3.00
2.56
4.56
3.20
57.70
15.00
29.00
21.5
3.60
1.58
3.05
2.38
0.009
0.0100
33.20
5.3
46.5
15.3
2.00
0.58
5.17
1.69
2.40
2.00
1.60
2.35
36.20
13.1
1.50
1.53
17.90
8.5
10.9
10.5
1.10
0.90
1.15
1.11
97.5 32.3 39.9 36.8
6.00 3.59 4.43 4.09
2/13/2017 S&ME. Inc.

-" C'C: SPINDLE
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E:1573377.48'
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PROPOSED LAYOUT AND GRADING FOR 35' SETBACK FROM THE R/W
• This map is PRELIMINARY for illustrative purposes and is NOT FOR CONSTRUCTION.
• Lots shown have been proposed and reviewed by Davie County planning, however, the
lots are not currently recorded with the register of deeds.
• Existing topo, existing conditions and new conditions are from prior surveys by Beeson
& Carter, P.A.
• This site is located in a FEMA designated flood area. The 1 % annual chance, 0.2%
annual chance flood lines, floodways and base flood elevations shown are from FEMA
DFIRM digital data, Map 37007C, dated 06-16-2009.
• Minimum Building Lines (MBL) as shown are 35' Front, 10' Side and 5' from Floodway
line. No rear is shown due to lot depths.
• 1500 CY of fill needed to prepare home sites.
• 1180 CY of fill needed to close up remaining pond area.
FAIRWAY #18
�K V PLLEY
O A LEV
6�UtotWayVX�•t�,{!_..
t 20, Landscape
a Easement '
314„
Private Drainage
Easement
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NOTES:
1. All distances shown on this plat are horizontal distances unless otherwise noted
2. 3/4" iron pipe at all corners unless otherwise noted.
3. There are no NCGS or USC&G or other Geodetic Survey Monuments within
2000' feet of this site.
4. All bearings shown on this plat are based on NC Grid - NAD83(2011), as noted.
5. Parcel Areas are calculated using the coordinate method.
6. Site is currently located in a FEMA designated flood area. The 1 % annual
chance, 0.2% annual chance flood lines, floodways and base flood elevations
shown are from FEMA DFIRM digital data, Map 37007C, dated 06-16-2009.
SYMBOL LEGEND I LOCATION MAP N.T.S.
• Pt. Calculated Point (As Shown)
A IPS Iron Pin Set (3/4" conduit)
O EIP Existing Iron Pipe (As Shown)
O EIR Existing Iron Rebar
°t- Stone Found
FG Flush with ground
AG x.xx' Above ground (Distance in ft.)
UG x.xx' Underground (Distance in ft.)
® Sanitary Sewer Manhole
PURPOSE STATEMENT:
The purpose of this map is to illustrate the
proposed layout for single family homes and
grading needed for a 35' setback from the R/W.
This map is PRELIMINARY FOR REVIEW ONLY
AND NOT FOR CONSTRUCTION.
PROJECT:
SHEET NO:
1 of 1
BEESOR &CRRTER, PR.
CIVIL ENGINEERS LAND SURVEYORS
LAND PLANNING
503 HIGH STREET, WINSTON-SALEM, NC 27101
OFFICE:[phone] FAX:[phone]
WEB: www.beesonengineering.com
Corp No.: C-4017
1201
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CLIENTS:
OAK VALLEY
ASSOCIATES LTD PARTNERSHIP
C/O Pete Ramey
PO Box 10
Bethania, NC 27010
DRAWN BY: ATC / TLBC
FIELDWORK: EE / MH
CHECKED BY: JEB
DATE:
10.20.2016
JOB NO:
15-034
SCALE:
1" = 60'
SHEET NO:
1 of 1
BEESOR &CRRTER, PR.
CIVIL ENGINEERS LAND SURVEYORS
LAND PLANNING
503 HIGH STREET, WINSTON-SALEM, NC 27101
OFFICE:[phone] FAX:[phone]
WEB: www.beesonengineering.com
Corp No.: C-4017
1201