20131200 Ver 2_More Info Received_20140227 (2)

Strickland, Bev
From: Devane, Boyd
Sent: Monday, March 03, 2014 11:09 AM
To: Strickland, Bev
Cc: Cranford, Chuck
Subject: FW: Tryon #13 -1200
Attachments: Permeable Pavement Drainage Area 4 revised 2- 27- 14.pdf; Permeable Pavement Drainage Area 5
revised 2- 27- 14.pdf; Permeable Pavement Drainage Area 6 revised 2- 27- 14.pdf
Bev, please file this letter and attachment in LF, thanks.
From: David Odom [ mai Ito: davidodom Ca)odomenaineerina.com]
Sent: Thursday, February 27, 2014 9:27 AM
To: Devane, Boyd
Subject: Tryon
Boyd
Here are the revised supplement sheets as we discussed. Let me know if everything looks okay to you.
Dave

Permit No.
(to be provided by DWQ)
v
STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM -
NCDENR p
PERMEABLE PAVEMENT SUPPLEMENT
This form must be completely filled out, printed and submitted.
The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information.
I. PROJECT INFORMATION
Project Name
Tryon International Equestrian Site
Contact Person
David Odom, PE
Phone Number
828 - 247 -4495
Date
2/5/2014
Drainage Area
#5
Soils Report Summary
Hydrologic soil group (HSG) of subgrade
C
Infiltration rate
0.38
Pavement Design Summary
Permeable Pavement (PP) design type
Infiltration - HSG C/D
SA of PP being proposed (AP)
47,910
Resulting BUA counted as impervious for main application form
23,955
Adjacent BUA directed to PP (AJ
5,345
Ratio of Ac to AP
0.11
Flow from pervious surfaces is directed away from PP?
Yes
Design rainfall depth
1.0"
Permeable pavement surface course type
PC
Layer 1 - Washed aggregate size (ex. No. 57)
No. 57
Layer 1 - Aggregate porosity (n)
0.40
Layer 2 - Washed aggregate size (ex. No. 57)
Layer 2 - Aggregate porosity (n)
Minimum total aggregate depth for design rainfall (Dwq)
5.0
Drawdown /infiltration time for Dwq
How is 10 -yr, 24 -hr storm handled?
bypassed
Aggregate depth to infiltrate 10 -yr, 24 -hr storm (D10)
20.0
Drawdown /infiltration time of 10 -yr, 24 -hr storm
1.00
Actual provided total aggregate depth
8.0
Top of aggregate base layer elevation
900.00
Storage elevation of design rainfall depth
899.59
Overflow elevation
899.59
Bottom elevation at subgrade
899.17
SHWT elevation
890.00
Underdrain diameter
4
in /hr
BUA Credit for Permeable Pavement Footprint:
50% BUA Credit
ftz
ftz
ftz OK
(unitless)
OK
in
(unitless) OK
(unitless)
in
days
Underdrain Required
in
days
in
fmsl
fmsl
fmsl
fmsl
fmsl
in
I
Form SW401- Permeable Pave ment- Rev.4- October 16, 2012 PP Supplement Form, Page 1 of 3

Detention Systems (skip for infiltration systems)
Diameter of orifice
Coefficient of discharge (Cc)
Driving head (Ho)
Storage volume discharge rate (through discharge orifice)
Storage volume drawdown time
Pre - development 1 -yr, 24 -hr peak flow
Post - development 1 -yr, 24 -hr peak flow
Additional Information
Slope of soil subgrade at bottom of permeable pavement
Slope of the permeable pavement surface
Construction sequence minimizes compaction to soils?
Subsoil preparation specified (must select one)
Meets industry standards for structural requirements?
Washed stone is specified for the aggregate?
Required signage specified on plans?
Number of observation wells provided
Distance to structure
Distance to surface waters
Distance to water supply well(s)
in
(unitless)
ft
ft3 /sec
days
ft3 /sec
ft3 /sec
0.50
%
OK
0.50
%
OK
Yes
OK
scarified
Yes
OK
Yes
OK
Yes
OK
1
OK
10.00
ft
100.00
ft
OK
400.00
ft
OK
Permit No.
(to be provided by DWQ)
Form SW401- Permeable Pave ment- Rev.4- October 16, 2012 PP Supplement Form, Page 2 of 3

Permit No.
(to be provided by DWQ)
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request
for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements
have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification.
Initials Pagel Plan Sheet No.
1. Plans (1" = 50' or larger) of the entire site showing:
- Design at ultimate build -out,
Off -site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per
basin),
Location of permeable pavement,
Roof and other surface flow directed away from permeable
pavement,
- Location of the permeable pavement sign(s).
2. Section view of the permeable pavement (1" = 20' or larger)
showing:
All layers (including details about the surface course), and
SHWT
3. A detail of what the permeable pavement sign
4. A site specific soils report that is based upon an actual field
investigation, soil borings, and infiltration tests within the
footprint of the proposed permeable pavement. The soils
investigation shall state the infiltation rate, SHWT elevation, and
information about any confining layers. County soil maps are not
an acceptable source of soils information.
(Projects in the WiRO - The results of the soils report must be
verified in the field by DWQ, by completing & submitting the soils
investigation request form.)
5. A construction sequence that shows how the permeable
pavement will be protected from sediment until the entire
drainage area is stabilized.
6. The supporting calculations.
7. A copy of the signed and notarized operation and maintenance
(O &M) agreement.
8. A copy of the deed restrictions (if required).
Form SW401- Permeable Pave ment- Rev.4- October 16, 2012 PP Supplement Form, Page 3 of 3

Permit No.
(to be provided by DWQ)
v
STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM -
NCDENR p
PERMEABLE PAVEMENT SUPPLEMENT
This form must be completely filled out, printed and submitted.
The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information.
I. PROJECT INFORMATION
Project Name
Tryon International Equestrian Site
Contact Person
David Odom, PE
Phone Number
828 - 247 -4495
Date
2/5/2014
Drainage Area
#i6
Soils Report Summary
Hydrologic soil group (HSG) of subgrade
B
Infiltration rate
1.66
Pavement Design Summary
Permeable Pavement (PP) design type
Infiltration - HSG A/B
SA of PP being proposed (AP)
33,187
Resulting BUA counted as impervious for main application form
8,297
Adjacent BUA directed to PP (AJ
31,681
Ratio of Ac to AP
0.95
Flow from pervious surfaces is directed away from PP?
Yes
Design rainfall depth
1.0"
Permeable pavement surface course type
PC
Layer 1 - Washed aggregate size (ex. No. 57)
No. 57
Layer 1 - Aggregate porosity (n)
0.40
Layer 2 - Washed aggregate size (ex. No. 57)
Layer 2 - Aggregate porosity (n)
Minimum total aggregate depth for design rainfall (Dwq)
5.0
Drawdown /infiltration time for Dwq
How is 10 -yr, 24 -hr storm handled?
bypassed
Aggregate depth to infiltrate 10 -yr, 24 -hr storm (D10)
20.0
Drawdown /infiltration time of 10 -yr, 24 -hr storm
1.00
Actual provided total aggregate depth
8.0
Top of aggregate base layer elevation
900.00
Storage elevation of design rainfall depth
899.75
Overflow elevation
899.75
Bottom elevation at subgrade
899.33
SHWT elevation
890.00
Underdrain diameter
4
in /hr
BUA Credit for Permeable Pavement Footprint:
75% BUA Credit
ftz
ftz
ftz OK
(unitless)
OK
in
(unitless) OK
(unitless)
in
days
Underdrain Required
in
days
in
fmsl
fmsl
fmsl
fmsl
fmsl
in
I
Form SW401- Permeable Pave ment- Rev.4- October 16, 2012 PP Supplement Form, Page 1 of 3

Detention Systems (skip for infiltration systems)
Diameter of orifice
Coefficient of discharge (Cc)
Driving head (Ho)
Storage volume discharge rate (through discharge orifice)
Storage volume drawdown time
Pre - development 1 -yr, 24 -hr peak flow
Post - development 1 -yr, 24 -hr peak flow
Additional Information
Slope of soil subgrade at bottom of permeable pavement
Slope of the permeable pavement surface
Construction sequence minimizes compaction to soils?
Subsoil preparation specified (must select one)
Meets industry standards for structural requirements?
Washed stone is specified for the aggregate?
Required signage specified on plans?
Number of observation wells provided
Distance to structure
Distance to surface waters
Distance to water supply well(s)
in
(unitless)
ft
ft3 /sec
days
ft3 /sec
ft3 /sec
0.50
%
OK
0.50
%
OK
Yes
OK
scarified
Yes
OK
Yes
OK
Yes
OK
1
OK
10.00
ft
100.00
ft
OK
400.00
ft
OK
Permit No.
(to be provided by DWQ)
Form SW401- Permeable Pave ment- Rev.4- October 16, 2012 PP Supplement Form, Page 2 of 3

Permit No.
(to be provided by DWQ)
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request
for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements
have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification.
Initials Pagel Plan Sheet No.
1. Plans (1" = 50' or larger) of the entire site showing:
- Design at ultimate build -out,
Off -site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per
basin),
Location of permeable pavement,
Roof and other surface flow directed away from permeable
pavement,
- Location of the permeable pavement sign(s).
2. Section view of the permeable pavement (1" = 20' or larger)
showing:
All layers (including details about the surface course), and
SHWT
3. A detail of what the permeable pavement sign
4. A site specific soils report that is based upon an actual field
investigation, soil borings, and infiltration tests within the
footprint of the proposed permeable pavement. The soils
investigation shall state the infiltation rate, SHWT elevation, and
information about any confining layers. County soil maps are not
an acceptable source of soils information.
(Projects in the WiRO - The results of the soils report must be
verified in the field by DWQ, by completing & submitting the soils
investigation request form.)
5. A construction sequence that shows how the permeable
pavement will be protected from sediment until the entire
drainage area is stabilized.
6. The supporting calculations.
7. A copy of the signed and notarized operation and maintenance
(O &M) agreement.
8. A copy of the deed restrictions (if required).
Form SW401- Permeable Pave ment- Rev.4- October 16, 2012 PP Supplement Form, Page 3 of 3

Permit
(to be provided by DWQ)
-� STORMWATER MANAGEMENT PERMIT APPLICATION FORM
NCDENR 401 CERTIFICATION APPLICATION FORM
PERMEABLE PAVEMENT SUPPLEMENT
This form must be completely filled out, printed and submitted.
The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information.
I. PROJECT INFORMATION
Project Name Tryon International Equestrian Site
Contact Person
Phone Number
Date
Drainage Area
David Odom, PE
828 - 247 -4495
2/5/2014
#4
II. DESIGN INFORMATION
Soils Report Summary
Hydrologic soil group (HSG) of subgrade
D
Infiltration rate
0.11
in /hr
Pavement Design Summary
BUA Credit for Permeable Pavement Footprint:
Permeable Pavement (PP) design type
Infiltration - HSG C/D
50% BIJA Credit
SA of PP being proposed (AP)
6,142
ft 2
Resulting BUA counted as impervious for main application form
3,071
ft 2
Adjacent BUA directed to PP (AJ
5,345
ft 2
OK
Ratio of Ac to Ap
0.87
(unitless)
Flow from pervious surfaces is directed away from PP?
Yes
OK
Design rainfall depth
1.0"
in
Permeable pavement surface course type
PC
Layer 1 - Washed aggregate size (ex. No. 57)
No. 57
Layer 1- Aggregate porosity (n)
0.40
(unitless)
OK
Layer 2 - Washed aggregate size (ex. No. 57)
Layer 2 - Aggregate porosity (n)
(unitless)
Minimum total aggregate depth for design rainfall (Dwq)
5.0
in
Drawdown /infiltration time for Dwq
days
How is 10 -yr, 24 -hr storm handled?
bypassed
Underdrain Required
Aggregate depth to infiltrate 10 -yr, 24 -hr storm (D10)
20.0
in
Drawdown /infiltration time of 10 -yr, 24 -hr storm
1.00
days
Actual provided total aggregate depth
8.0
in
OK
Top of aggregate base layer elevation
895.50
fmsl
Storage elevation of design rainfall depth
895.25
fmsl
Overflow elevation
895.25
fmsl
Bottom elevation at subgrade
894.83
fmsl
# REFI
SHWT elevation
882.00
fmsl
Underdrain diameter
4
in
Form SW401- Permeable Pavement- Rev.4- October 16, 2012 PP Supplement Form, Page 1 of 3

Detention Systems (skip for infiltration systems)
Diameter of orifice
in
Coefficient of discharge (Co)
(unitless)
Driving head (Ho)
ft
Storage volume discharge rate (through discharge orifice)
ft3 /sec
Storage volume drawdown time
days
Pre - development 1 -yr, 24 -hr peak flow
ft3 /sec
Post - development 1 -yr, 24 -hr peak flow
ft3 /sec
Additional Information
Slope of soil subgrade at bottom of permeable pavement
0.50
Slope of the permeable pavement surface
0.50
Construction sequence minimizes compaction to soils?
Yes
Subsoil preparation specified (must select one)
scarified
Meets industry standards for structural requirements?
Yes
Washed stone is specified for the aggregate?
Yes
Required signage specified on plans?
Yes
Number of observation wells provided
1
Distance to structure
10.00
ft
Distance to surface waters
100.00
ft
Distance to water supply well(s)
400.00
ft
OK
OK
OK
OK
OK
OK
OK
OK
OK
Permit
(to be provided by DWQ)
Form SW401- Permeable Pavement- Rev.4- October 16, 2012 PP Supplement Form, Page 2 of 3

Permit
(to be provided by DWQ)
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request
for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements
have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification.
Initials Pagel Plan Sheet No.
1. Plans (1" = 50' or larger) of the entire site showing:
- Design at ultimate build -out,
Off -site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per
basin),
Location of permeable pavement,
Roof and other surface flow directed away from permeable
pavement,
- Location of the permeable pavement sign(s).
2. Section view of the permeable pavement (1" = 20' or larger)
showing:
All layers (including details about the surface course), and
SHWT
3. A detail of what the permeable pavement sign.
4. A site specific soils report that is based upon an actual field
investigation, soil borings, and infiltration tests within the
footprint of the proposed permeable pavement. The soils
investigation shall state the infiltation rate, SHWT elevation, and
information about any confining layers. County soil maps are not
an acceptable source of soils information.
(Projects in the WiRO - The results of the soils report must be
verified in the field by DWQ, by completing & submitting the soils
investigation request form.)
5. A construction sequence that shows how the permeable
pavement will be protected from sediment until the entire
drainage area is stabilized.
6. The supporting calculations.
7. A copy of the signed and notarized operation and maintenance
(O &M) agreement.
8. A copy of the deed restrictions (if required).
Form SW401- Permeable Pavement- Rev.4- October 16, 2012 PP Supplement Form, Page 3 of 3