20080712 Ver 1_More Info Received_20080604

Environmental Services, Inc.
2 June 2008
3661 Alamance Road
Burlington, NC 27215
[phone], [phone] fax
www.environmentalservices.cc
Cyndi Karoly
Supervisor, 401 Wetlands Unit
N.C. Division of Water Quality
2321 Crabtree Blvd., Suite 250
Raleigh, NC 27604
Re: Request for More Information, Phoenix Cove Subdivision, DWQ Project # 08-0712
Ms. Karoly:
On behalf of our client, Phoenix Creek Development, LLC, we are submitting this response to your Request
letter of May 5, 2008. I was able to meet with Ian McMillan and other DWQ staff members at your offices on
May 19d' to review and discuss. Pursuant to that meeting and review by civil engineer, please reference the
following:
Item 1: The last bound-and-published soil survey listed for Buncombe County is from 1954; we could not
locate a printed copy. The NRCS lists Web Soil Survey as the alternative and we have attached a map here
here with the project site overlain.
Item 2: Submitted under separate cover by civil engineer (Mercer Design), via Federal Express this date.
Item 3: An impervious inventory is attached.
Items 4, 5, 6, 11: All requested features are depicted in revised drawings sent under Item 2 above.
Item 7, 8: A letter from the civil engineer with two sketches is attached. This outlines why in his
professional judgment the alternative road layouts as proposed at the May 19th meeting are not feasible and
states that all proposed impacts are accounted for in the submitted plans.
9. Agent Authorization is attached.
10. Field review of the delineation by USACE/DWQ on 15 January 2008 deemed all streams as flagged to be
jurisdictional and perennial beginning at headwaters. Stream determination forms and representative
photographs are attached for the 1 s` order and 2nd order reaches on the tract.
Please review and contact me at your earliest convenience.
Sincerely,
Charles S. Johnston
Senior Scientist, Environmental Services, Inc.
[phone] mobile
9@90WOR
JUN 4 2008
rt14iJ -Y
fin-'' . ? ??,nAlGH
Phoenix Cove Subdivision, DWQ Project # 08-0712
Soil Survey via NRCS Web Soil Survey, http://websoilsurvey.nres.usda.gov/app/
SOIL MAP
Phoenix Cove Subdivision, DWQ Project # 08-0712
Soil Survey via NRCS Web Soil Survey, http://websoilsurvey.nres.usda.gov/app/

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5
PHOENIX COVE SUBDIVISION
IMPERVIOUS AREA INVENTORY
In response to Comment No. 3, contained in the Division of Water Quality's
Request for More Information dated May 5, 2008, the following is an inventory of
expected build-out impervious areas for the subject property.
The total project area is approximately 159 acres, subdivided into 72 single
family lots of over one acre each as required and approved by the Buncombe
County Watershed Board. For the purposes of this inventory, each lot is
expected to have a 2,700 sf structure footprint (two story sloping lot single family
structure).
Each home site will be accessed by driveways of approximately 12 ft width and
averaging 200 If long. Historically for subdivisions of this nature and locale,
approximately 50% are developed as aggregate base course surfaces. For the
purposes of this inventory, all driveways will be considered to be paved.
The project has a total of 2.51 miles (12,252 If) of proposed roads, with widths of
18 and 20 feet. For the purposes of this inventory, the roads will be considered to
be 20 ft wide and paved. No curbing is planned, with grassed shoulders and
drainage swales.
Therefore:
(72 lots)(2,700 sf ea. building) ...................... 418,500 sf
(72 lots)(12 ft x 200 ft ea. Driveway) .............. 172,800 sf
(13,252 If roads)(18 ft wide) .......................... 23.854 sf
Total Impervious area....... 615,154 sf = 14.12 ac
(14.12 impervious area) / (159 ac Total site area)= 8.88% Impervious
MIA(a DESIGN (AOUP, Pc
CTVTI, ENGINEERING • PROJECT MANAGEMENT
Cindy Karoly, PE
Supervisor, 401 Unit
N.C. Division of Water Quality
2321 Crabtree Blvd., Suite 250
Raleigh, NC 27604
Ms. Karoly:
Mercer Design Group, at the request of Mr. Charles Johnston of Environmental Services
Inc. has completed a review of the Phoenix Creek Development plan as it relates to
Department of Water Quality Request for More Information dated May 5, 2008.
Specifically we have been asked to address items #7 and item #8.
Re: Item #7: The plan as originally submitted includes all anticipated stream impacts
and accounts for all fill slopes, driveways and other proposed construction. The impact
of each crossing was measured along stream length, not the culvert length. Rip-Rap
dissipaters are not generally placed in high quality water streams and are usually not
allowed by NCDENR, Land Quality Section. Our intent is that the contractor will disturb
only that portion of the stream necessary to install the culvert. The culvert invert will be
set below the stream invert and the bottom of the culvert shall be backflled with the
excavated material to accommodate aquatic passage through the culvert.
Re:.Item #8. The Buncombe County Ordinances which regulate major subdivisions allow
for a maximum of 15% grade in tangent sections with an allowance for short section of
18% maximum grade within the tangent section. The maximum grade through a
horizontal curve is 15% and the minimum radius of a horizontal curve is 90-feet. We
have reviewed the alternative road re-alignments as sketched by DWQ staff in the
meeting with Mr. Johnston on May 19th. The road grades for these layouts exceed 20%
grade and in at least one area exceed 40% grade. We also studied lengthening the
proposed re-alignments; however this did not alleviate the maximum grade problems
and at several points would actually require graded slopes to extend into stream buffer
areas not previously impacted.
If I can provide any additional information, please contact my office through Mr.
Johnston.
Sincerely,
arvin Mercer, PE
Principal
P.O. Box 1516 WeaverAle, NC 28787
Phone: [phone]o88 Fax: [phone] E-mail: [e-mail]
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Environmental Services, Inc.
3661 Alamance Road
Burlington, NC 27215
[phone], [phone] fax
www. environmentalservi ces inc. corn
ACCESS AGREEMENT
and
AGENT AUTHORIZATION
C GeV), ?- L <::!?
I, i?V , representing D r? 1 v ?c? (applicant/owner), hereby
authorize representatives of the U.S. Army Corps of Engineers and/or N.C. Division of Water
Quality to access the subject property, listed below, for the purpose of performing a jurisdictional
wetland, stream, or buffer determination. Environmental Services, Inc.. (ESI) is acting as out
Authorized Agent for this project and must accompany agency personnel when visiting this site.
Project Name: Phoenix Creek Tract
Location: Buncombe County, North Carolina
ESI Project #: BUR07-153
?L C t
Owner/Applicant: ,;,s
Printed Name:
Signature:
kA / X-'4-"0J i(V?ee
Date: ) a ? c:?
North Carolina Division of Water Uuallty - Stream identlTicaIion corm; version 3.1
Date: 12/12/2007 Project: Phoenix Cove Latitude: 37.7129 N
Evaluator: Charles Johnston, ESI Site: Stream SVA, 1st order Longitude: 82.5057 W
Total points:
Streams are at least intermittent if 28 County: Buncombe Other:
>=19 or erennial if>=30.
A. Geomorphology subtotal = 10 Absent Weak _ Moderate- Strong;
1*. Continuous bed and bank 00 01 C3 2 03
2. Sinuosity 00 (] 1 02 03
3. In-channel structure: rife pool sequence 00 (E) 1 02 03
4. Soil texture or stream substrate sorting 00 0 1 02 03
5. Active/relic floodplain 00 01 02 03
6. Depositional bars or benches 'C•') 0 01 02 03
7. Braided channel G) 0 01 02 03
8. Recent alluvial deposits 00 C} 1 02 03
9*. Natural levees E) 0 01 02 03
10. Headcuts 0 0 01 02 03
11. Grade controls 00 00.5 01 0 1.5
12. Natural valley and drainageway 00 00.5 01 (E) 1.5
13. Second or greater order channel on existing USGS or NRCS
map or other documented evidence.
} No = 0
( Yes = 3
swan-maue uncnes are noc raceu; see uiscussions in manual
B. Hvdroloov subtotal = 9.5
14. Groundwater flow/discharge 00 01 02 () 3
15. Water In channel and >48 hrs since rain, or Water in channel
- dry or growing season
00
01
02
0 3
16. Leaflitter 01.5 () 1 00.5 00
17. Sediment on plants 0 0 00.5 01 01.5
18. Organic debris lines or piles (wrack lines) 00 00.5 (E) 1 01.5
19. Hydric soils (redoxomorphic features) present? 0 No = 0 (D Yes = 1.5
C. Sioloav subtotal = 8.5
20*. Fibrous roots in channel 03 f) 2 01 00
21*. Rooted plants in channel 03 0 2 01 00
22. Crayfish 0 0 00.5 01 01.5
23. Bivalves 0 0 01 02 03
24. Fish E) 0 00.5 01 01.5
25. Amphibians 00 00.5 (D 1 01.5
26. Macrobenthos (note diversity and abundance) 00 00.5 () 1 01.5
27. Filamentous algae; periphyton 00 01 02 03
28. Iron oxidizing bacteria/fungus 00 0 0.5 01 01.5
129*. Wetland plants in streambed 0 FAC 0 FACW O O BL 0 SAV 0 Other
*Items 20-21 focus on the presence of upland plants, item 29 focuses on the presence of aquatic or wetland plants
Dotes: This reach was assessed during 'exceptional drought' conditions.
Norin t arollna UIVISIon OT vvater uuallty - stream mentlTIcavon rorm; version a.l
Date: 12112/2007 Project: Phoenix Cove Latitude: 37.7129 N
Evaluator: Charles Johnston, ESI Site: Stream SC, 2nd order Longitude: 82.5057 W
Total points:
Streams are at least intermittent if County: Buncombe Other:
>=19 or perennial if >=30, 40.5 A. Geomorphology subtotal = 19 'Absent- Weak Moderate Strong -

1*. Continuous bed and bank 00 01 02 0 3
2. Sinuosity 00 01 (E) 2 03
3. In-channel structure: rife pool sequence 00 01 G) 2 03
4. Soil texture or stream substrate sorting 00 01 G) 2 03
5. Active/relic floodplain 00 G) 1 02 03
6. Depositional bars or benches 00 G) 1 02 03
7. Braided channel 00 0 1 02 03
8. Recent alluvial deposits 00 0 1 02 03
9*. Natural levees 0 0 01 02 03
10. Headcuts (D 0 01 02 03
11. Grade controls 00 00.5 01 0 1.5
12. Natural valley and drainageway 00 00.5 01 0 1.5
13. Second or greater order channel on existing USGS or NRCS
map or other documented evidence.
0 No = 0
0 Yes = 3
man-ma c ---- arc nor ia, , ae ups,--o ,, mama,
S. Hvdroloov suhtntnl = in i;
14. Groundwater flow/discharge 00 01 02 G) 3
15. Water in channel and >48 hrs since rain, or Water in channel
- dry or growing season
00
01
02
t) 3
16. Leaflitter 0 1.5 01 00.5 00
17. Sediment on plants 00 00.5 01 01.5
18. Organic debris lines or piles (wrack lines) 00 00.5 (E) 1 01.5
19. Hydric soils (redoxomorphic features) present? 0 No = 0 G) Yes = 1.5
C. 6inlnnv cuhtntnI = 11
20*. Fibrous roots in channel 03 'D 2 01 00
21*. Rooted plants in channel (D 3 02 01 00
22. Crayfish 00 00.5 0 1 01.5
23. Bivalves 0 0 01 02 03
24. Fish 00 (D 0.5 01 01.5
25. Amphibians 00 00.5 G) 1 01.5
26. Macrobenthos (note diversity and abundance) 00 00.5 (D 1 01.5
27. Filamentous algae; periphyton 00 01 G) 2 03
28. Iron oxidizing bacteria/fungus 00 0 0.5 o 1 01.5
29*. Wetland plants in streambed
•It 0 FAC 0 FACW 0 O BL 0 SAV Q Other
ems 20-21 focus on the presence of upland plants, item 29 focuses on the presence of aquatic or wetland plants
otes: This reach was assessed during 'exceptional drought' conditions.
ENVIRONMENTAL Representative Stream Photographs Project: BUR07153
SERVICES, INC. n
3661 Alamance Road Phoenix x Cove Date' April 2008
Burlington, North Carolina 27215 •
[phone] Buncombe County, North Carolina DnNn/Chkd: csj/csj
[phone] Fax
c vvv esi
?.environmenrelservicesinc.com Figure: 1
1 st order perennial, upper reach
1st order perennial, lower reach
2nd order perennial, upper reach
2nd order perennial, lower reach