20070621 Ver 1_More Info Received_20070628

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Westcott ,
Engineering
onsulting, PC
Date: June 27, 2007
07-0 62 1
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To: Division of Water Quality From: Michael B. Westcott, PE
NCDNR Westcott Engineering & Consulting, PC
401/Wetlands Unit 4015 Meeting Way
1650 Mail Service Center Suite 105
Raleigh, NC 27699-1650 High Point, NC 27265
We are sending you ®attached ^ under separate cover the following items:
^ Shop Drawings ^ Estimate ^ Disk
® Prints ^ Specifications ®Other
^ Contracts ^ Copy of Letter

" Ct~P1ES DRAti~'I'~'G N(~ I)ES~'R[P I IUN DISI'n~I I I()N
7 Pre-Construction Notification For Approval
(PCN) Revised Application
Form for Golding Center Drive
Development (Chamberlain
Place)
7 Revised Copies of Impact Area For Approval
Drawings
5 Bio-cell Watershed Plans For Approval
5 Calculations For Approval
REMARKS:
Please do not hesitate to contact us if you have any questions or comments.
Thank you
cc: File
4015 Meeting Way, Suite 105, High Point, NC 27265 Phone: [phone] Fax [phone]

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07-062
Watershed Calculations
for
Chamberlain Apartments
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Engineering
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4015 Meeting Way
Suite 105
High Point, NC 27265
Phone: [phone]
Fax: [phone]
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Bioretention #1
Flows
Drainage Area 1.32 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 6.1 cfs
Sizing
Size Criteria (5% or 7%) 5%
Required Size 2300 sf
Provided Size 2656 sf
Recommended Length 67.8
Recommended Width 33.9
Plantings
Total 61
Trees g
Shrubs 18
Herbaceous 34
Bioretention #2
Flows
Drainage Area 0.97 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 4.5 cfs
Sizing
Size Criteria (5% or 7%) 5°!0
Required Size 1690 sf
Provided Size 1890 sf
Recommended Length 58.1
Recommended Width 29.1
Plantings
Total 43
Trees 7
Shrubs 13
Herbaceous 24
Bioretention #3
Flows
Drainage Area 1.53 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 7.1 cfs
Sizing
Size Criteria (5% or 7%) 5%
Required Size 2666 sf
Provided Size 2904 sf
Recommended Length 73.0
Recommended Width 36.5
Plantings
Total 67
Trees 10
Shrubs 20
Herbaceous 37

Bioretention #4
Flows
Drainage Area 0.7 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 3.3 cfs
Sizing
Size Criteria (5% or 7%) 5%
Required Size 1220 sf
Provided Size 1224 sf
Recommended Length 49.4
Recommended Width 24.7
Plantings
Total 28
Trees 4
Shrubs 8
Herbaceous 15
Bioretention #6
Flows
Drainage Area 0.83 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 3.9 cfs
Sizing
Size Criteria (5% or 7%) 5%
Required Size 1446 sf
Provided Size 1890 sf
Recommended Length 53.8
Recommended Width 26.9
Plantings
Total 43
Trees 7
Shrubs 13
Herbaceous 24
Bioretention #7
Flows
Drainage Area 1.88 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 8.7 cfs
Sizing
Size Criteria (5% or 7%) 5%
Required Size 3276 sf
Provided Size 4$57 sf
Recommended Length 80.9
Recommended Width 40.5
Plantings
Total 112
Trees 17
Shrubs 33
Herbaceous 61

Bioretention #8
Flows
Drainage Area 0.57 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 2.6 cfs
Sizing
Size Criteria (5% or 7%) 5%
Required Size 993 sf
Provided Size 1002 sf
Recommended Length 44.6
Recommended Width 22.3
Plantings
Total 23
Trees 3
Shrubs 7
Herbaceous 13
Bioretention #10
Flows
Drainage Area 0.62 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 2.9 cfs
Sizing
Size Criteria (5% or 7%) 5%
Required Size 1080 sf
Provided Size 1187 sf
Recommended Length 46.5
Recommended Width 23.2
Plantings
Total 27
Trees 4
Shrubs 8
Herbaceous 15
Bioretention #11
Flows
Drainage Area 0.6 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 2.8 cfs
Sizing
Size Criteria (5% or 7%) 5°!0
Required Size 1045 sf
Provided Size 1143 sf
Recommended Length 45.7
Recommended Width 22.9
Plantings
Total 26
Trees 4
Shrubs 8
Herbaceous 14

Bioretention #12
Flows
Drainage Area 1.59 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 7.4 cfs
Sizing
Size Criteria (5% or 7%) 5%
Required Size 2770 sf
Provided Size 3402 sf
Recommended Length 74.4
Recommended Width 37.2
Plantings
Total 78
Trees 12
Shrubs 23
Herbaceous 43
Bioretention #13
Flows
Drainage Area 0.46 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 2.1 cfs
Sizing
Size Criteria (5% or 7%) 5%
Required Size 802 sf
Provided Size 1007 sf
Recommended Length 40.0
Recommended Width 20.0
Plantings
Total 23
Trees 3
Shrubs 7
Herbaceous 13
Bioretention #14
Flows
Drainage Area 0.31 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 1.4 cfs
Sizing
Size Criteria (5% or 7%) 5%
Required Size 540 sf
Provided Size 696 sf
Recommended Length 32.9
Recommended Width 16.4
Plantings
Total 16
Trees 2
Shrubs 5
Herbaceous g

Bioretention #15
Flows
Drainage Area 1.64 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 7.6 cfs
Sizing
Size Criteria (5% or 7%) 5%
Required Size 2858 sf
Provided Size 3013 sf
Recommended Length 75.6
Recommended Width 37.8
Plantings
Total gg
Trees 10
Shrubs 21
Herbaceous 3g
Bioretention #16
Flows
Drainage Area 0.57 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 2.6 cfs
Sizing
Size Criteria (5% or 7%) 5%
Required Size 993 sf
Provided Size 1120 sf
Recommended Length 44.6
Recommended Width 22.3
Plantings
Total 2g
Trees 4
Shrubs g
Herbaceous 14
Bioretention #17
Flows
Drainage Area 0.71 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 3.3 cfs
Sizing
Size Criteria (5% or 7%) 5%
Required Size 1237 sf
Provided Size 1339 sf
Recommended Length 49.7
Recommended Width 24.9
Plantings
Total 31
Trees g
Shrubs g
Herbaceous 17

Bioretention #18
Flows
Drainage Area 0.75 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 3.5 cfs
Sizing
Size Criteria (5% or 7%) 5%
Required Size 1307 sf
Provided Size 1409 sf
Recommended Length 51.1
Recommended Width 25.6
Plantings
Total 32
Trees 5
Shrubs 10
Herbaceous 1g
Bioretention #19
Flows
Drainage Area 0.81 ac
Post Runoff Coefficient 0.8
Time of Concentration 14 min
10 yr Flow 3.8 cfs
Sizing
Size Criteria (5% or 7%) 5%
Required Size 1411 sf
Provided Size 1460 sf
Recommended Length 53.1
Recommended Width 26.6
Plantings
Total 34
Trees 5
Shrubs 10
Herbaceous 1g
Bioretention #20
Flows
Drainage Area 0.71 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 3.3 cfs
Sizing
Size Criteria (5% or 7%) 5%
Required Size 1237 sf
Provided Size 1269 sf
Recommended Length 49.7
Recommended Width 24.9
Plantings
Total 29
Trees 4
Shrubs g
Herbaceous 16

Bioretention #21
Flows
Drainage Area 1.26 ac
Post Runoff Coefficient 0.8
Time of Concentration 10 min
10 yr Flow 5.9 cfs
Sizing
Size Criteria (5% or 7%) 5%
Required Size 2195 sf
Provided Size 2286 sf
Recommended Length 66.3
Recommended Width 33.1
Plantings
Total 52
Trees g
Shrubs 16
Herbaceous 2g

0 7- 6 2 1
10. Describe the overall project in detail, including the type of equipment to be used: The
project is the construction of an apartment complex The crossing is access to the western
corner of the property Expected equipment includes backhoes bulldozers and awing
machines.
11. Explain the purpose of the proposed work: The purpose of the work is to cross a creek to
access the entire parcel and to gain access to sanitary sewer
IV. Prior Project History
If jurisdictional determinations and/or permits have been requested and/or obtained for this
project (including all prior phases of the same subdivision) in the past, please explain. Include
the USACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
certifications or other useful information. Describe previously approved wetland, stream and
buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project,
list and describe permits issued for prior segments of the same T.I.P. project, along with
construction schedules. None
V. Future Project Plans
Are any future permit requests anticipated for this project? If so, describe the anticipated work,
and provide justification for the exclusion of this work from the current application.
No future improvements are expected.
VI. Proposed Impacts to Waters of the United States/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
wetlands, open water, and stream channels associated with the project. Each impact must be
listed separately in the tables below (e.g., culvert installation should be listed separately from
riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts,
permanent and temporary, must be listed, and must be labeled and clearly identifiable on an
accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial)
should be shown on a delineation map, whether or not impacts are proposed to these systems.
Wetland and stream evaluation and delineation forms should be included as appropriate.
Photographs may be included at the applicant's discretion. If this proposed impact is strictly for
wetland or stream mitigation, list and describe the impact in Section VIII below. If additional
space is needed for listing or description, please attach a separate sheet.
1. Provide a written description of the proposed impacts:The proposed impacts are 120 LF of
stream crossing for a roadway/ Sanitary Sewer and 20 LF for a sanitary sewer crossing.
Updated 11/1/2005
Page 7 of 12

2. Individually list wetland impacts. Types of impacts include, but are not limited to
mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams,
separately list impacts due to both structure and flnnd;na
_
Wetland Im act
P
Site Number

(indicate on map) _

T e of Im act
yp p . ~

Type of Wetland

(e.g., forested, marsh,
herbaceous, bog, etc.) __D.
Located within
100- ear
Y
Flood lain
p
(yes/no)
Distance to
Nearest

Stream

(linear feet)
Area of
Im
pact

(acres)

Total Wetland Impact (acres)
3. List the total acreage (estimated) of all existing wetlands on the property: 0
4. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary
impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam
construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib
walls, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed,
plans and profiles showing the linear footprint for both the original and relocated streams
must be included. To calculate acreage, multiply length X width_ then d;v;de by 4~ 5Fn
Stream Impact
perennial or Average Impact Area of
Number Stream Name Type of Impact
Intermittent? Stream Width Length Impact
mdicate on ma
( )
Before Im act
(linear feet) )
(acres
1 Unnamed tributary Culvert/Sanitary

to Muddy Creek
Sewer perennial 17' 120 LF 0.05
2 Unnamed tributary
to Muddy Creek Sanitary Crossing Perennial
14 20 LF 0.01

Total Stream Impact (by length and acreage) 140 LF 0.06
5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic
Ocean and any other water of the U.S.). Open water impacts include, but are not limited to
fill, excavation, dredging, flooding, drainage, bulkheads, etc.
Open Water Impact
Site Number

(indicate on ma)
Name of Waterbody
(if applicable)
T e of Im act
~ p Type of Waterbody
lake and estu
( ~ p ary, sound, bay,
ocean, etc.) Area of

Impact
(acres)

Total Open Water Impact (acres)
Updated 11/1/2005
Page 8 of 12