20061121 Ver 1_Stormwater Info_20070724

~ DAVIS-MARTIN-POWELL & ASSOCIATES, INC.
ENGINEERING LAND PLANNING SURVEYING
6415 Old Plank Road, High Point, NC 27265 ~+ ~~~ r
[phone] • Fax [phone] • www.dmp-inc.com fl/
TRANSMITTAL
Date: July 20, 2007
To: NCDENR Re: James Landing Commercial Park
Division of Water Quality E3295
Attn: Annette Lucas
1650 Mail Service Center
Ralei h, NC 27699-1650
We are sending you attached the following items:
^ Shop Drawings ^ Samples ^ Copy of Letter
^ Prints ^ Specifications ^ Other
^ Plans ^ Disk
# Co ies Drawin # Descri tion Disposition
3 1-9 Watershed Plans
1 Bioretention Area Worksheets
1 Calculations
Remarks:
Please accept these plans for your approval. I have addressed all the comments from
your letter dated July 2, 2007. Please contact Joe Humble or myself in our office with
any questions or comments. Thank you.
c: File ,,~~k~ _ ~~' ~i' ~
By: Q/JLL~Q 1_~GC~~~l.~
Lisa Meadows

~ i
Permit No.
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
BIORETENTION BASIN SUPPLEMENT
This form. nzay be photocopied for use as an original.
(to be provided by DWQ)
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name:~1~~5 Ll~lVt~lt~~, C,UKINIC.1?Clta-L P~~i~-
Contact Person: L t~/t IY1c/~n-~,e~S Phone Number: (3 to) £~~,(~~ -- ~~ a, \
For projects with multiple basins, specify which basin this worksheet applies to: NO. -~-
(nzust match the DA # on the application & plans)
II. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. All elevations shall be in feet mean sea level
(fmsl).
Soils Report Summary
In-Situ Soil Type ~ nL
In-Situ Soil Infiltration Rate t7 in./hr. (tlie most restrictive soil layer)
SHWT Elevation 1 -a ft. (Seasonal Higli Water Table elevation)
Planting Soil Texture ~~-'nd~ l..a~m (must be a sandy loam, loamy sand, or loam texture)
Planting Soil Infiltration Rate b ~"15 in./hr.
Basin Design Parameters
Drainage Area 5545 sq.ft. (on-site and off-site drainage to the basin)
Impervious Area 35rD 1 ~ sq.ft. (on-site and off-site drainage to the basin)
Design Storm ~ inch (1.5 inch event for SA waters, 1 inch event for others)
Design Volume dG l~7 ~ c.f. (storage volume required)
Inlet Velocity ~.~~_ fps ~~ ~ , ~ ' ~ ti- ~ , „j
~ `
~
~~ ~
°
Drawdown Time _ l ~ ,
+_.
hours ~ ~
.
,
~
.- .~ ° ~~ ~ s

Basin Elevations ~~ -' ? y ~ Z U 0
Temporary Pool Elevation g3"1. DO fmsl (elevation of the Irypass/outlet structure)
Planting Elevation 83fQ. CAD fmsl (elevation of the ground surface bottozn) ,, ~ `• ~;`;' ` ''~~''' ~~~'~
~t s, ti ~ _, b~ +u ~~ ~~,~~~cr
Bottom Elevation ~ 3a7, '?`J fmsl (elevation of the bottom of the planting media)
Basin Dimensions
Basin Size
"'~~
ft. x ~~ ft. _ ~~5q. ft. (surface area at basin bottom)
Basin Volume Provided 3~~k;~ c.f.
SWU-108 4.07
Page 1 of 4

basin Plantings
Number of plantings required o~ 3 stems (400 ster~zs per acre of biarete~atian area is required at ~~ nzi~ai~nuna)
Total No, of plantings provided J•7 =Trees ICJ + Slu•ubs ~'' (at least 1 tree far ever>> 3 shrubs)
This system (clzeclc one) does does not incorporate the use of an under-drain.
(Under-drains are not allowe r those projects that drain to class SA waters.)
III. REQUIRED ITEMS CIIECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H .1000. These requirements are subject to change in
accordance with the manual and rules.
Initial in the space provided to indicate that the following design requirements have been inet and supporting
documentation is attached. If a requiretne~at Izas not been net, attacla w~ztte~7. justification. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
LM a. System is located 50 feet from class SA waters and 30 feet fiom other surface waters.
t.1~ b. No vertical sand bed is proposed.
LM c. The bioretention area is at least 15 feet wide by 40 feet long.
LM d. A grass buffer strip and sheet flow conditions are provided at the inlet.
LM e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
f. Ponding depth of 6-12" is provided.
LM g. In-situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
L-lv~ h. An in-depth soils report is provided. (report should include soil types, boring log, map,
suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
LM i, The planting soil has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
placement specifications of the planting media are noted on the plans.
~ M j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater. Best Management Practices Manual, including a low phosphorus content to
promote phosphorus removal. (P-Index of 20 to 40 is optimal.) Iirclude a soils test, indicating
P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
L~ k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
~~ 1. A detailed planting plan, prepared by a qualified individual, is provided on the plans. This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizer
requirements, installation procedures, construction schedule, etc..
SV,rCJ-l08 4.07
Page 2 of 4

L~1
LM
Ll~
l,~
~M
LM
m. Type of mulch layer and depth is specified on the plans.
n. Plan and section details for the bioretention area are provided. (including dimensions and
elevations)
o. Plan details for the inlet and outlet structures are provided. (including dimensions and
elevations)
p. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
q. A benchmark is provided to deternune the sediment accumulation in the basin area.
r. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet: for SA waters, 30 feet for other waters).
s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
I~. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc, shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every sigiuficant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re-seed, re-plant, and re-mulch as necessary to maintain good vegetative and
mulch cover.
Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over-excavating. Over-excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4. Replace, or add additional mulch as needed. Removal of the old mulch layer before applying the new layer is
recommended every 2 to 3 years.
5. Prune trees and shrubs and remove debris on an annual basis. Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and shrubs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed
SvF'U-108 4.07
Page 3 of 4

MAC'-16-2881 11:55A FROM: TUCKER ~ ASSOCIATES 336-632-D2D7 70:8864458 P.2
8. Soil testing shall be conducted annually to determine pI-I and any accumulation of toxins in the planting media.
Lime or other alkaline substances shall be applied as recammended per the soil test and toxic soils shall be
removed, disposed of properly and replaced with new planting media.
9. All components of the bioretention area system shall be maintained in good working order.
10. If the Division determines that the system .is failing, the system will immediately be repaired to original design
specifications, If the system cannot be repaired to perform .its design function, other stotrrtwater control devices
as allowed by NCAC 2H . ].000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the ten maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the
system or responsible parry.
Print name; James Landing Commercial Park Owner's Association BY: Barry Siegal
Title; Manager/Member
Address: P • 0 • Box 1.9972
Phane: Greensboro, NC 27419
Signature:
Date; 5 / ~ 6 X07
I~TOte: The 3egally responsible party should not be n homeowners association unless more than 50% of the lots have been sold and a
resident of. the subdivision has been named the president.
I Carolyn Poulin , a Notary Public for Che State of North Carolina
County of Guilford , do hereby certify that Baxxy S. Siegal
personally appeared before me this 16 day of May ~ 2007 ,and acknowledge the
due execution of the forgoing bioretention basin maintenance requirements, Witness my hand and official seal,
' ``r r
,~,. ~- ,.
°` „ - ~ ,.
~. a •`r
V ~ •^ .~4^ ^'q..
V h ~^
SEAL
My commission expi .~~ ~v r~~ ~~
f/ p2-~ (, ~~-
~~-f~o ~ ~r tiJ rou ~,'
SWU-J 08 4.D7
Page 4 of 4

~'
Permit No.
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality ~j/_ /~~'
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
BIORETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original.
DWQ stormwater Management Plan Review:
A complete stormwater management plan submittal includes a stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name : L~ MY~ E~ IJ~ND t N 6 C c`~ 1~l (VI ~ i ~. t {~(,,,,_.p Iq-f~ K
Contact Person: LISA (\~~=/~-Dowg Phone Number: (33to) ~~.~lv-`~~~~
For projects with multiple basins, specify which basin this worksheet applies to: N~ ~ a-
(must match the DA # on the application & plans)
II. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. All elevations shall be in feet mean sea level
(fmsl).
Soils Report Summary
In-Situ Soil Type
In-Situ Soil Infiltration Rate
SHWT Elevation
Planting Soil Texture
Planting Soil Infiltration Rate
~ (',
(~ , ~}fl in./hr. (the most restrictive soil layer)
1 - ~ ft. (Seasonal High Water Table elevation)
GjQr~.u ~ caves (must be a sandy loam, loamy sand, or loam texture)
o . -75 in./hr.
Basin Design Parameters
Drainage Area 35 ~~ ~ sq.ft. (on-site and off-site drainage to the basita)
Impervious Area a~-I-~(ot7 sq.ft. (on-site and off-site drainage to the basin)
Design Storm ~ inch (1.5 inch event for SA waters, 1 inch event for otl2ers)
Design Volume ~~ _ c.f. (storage volume required)
Inlet Velocity _~.~-~ _ fps ~1' ° ~ : ;~ ~ , ~;~ ~~
w_ ~ .. i_
Drawdown Time 1 2~ _ hours ~;i, i
~:
~i U ~ ~ '~ "1001
Basin Elevations
Temporary Pool Elevation ~ ~~y fmsl (elevation of the bypass/outlet structure) °~s~-r M,~, ~~ C ;,~, ,.r.k
Planting Elevation O`er ~~ fmsl (elevation of the ground surface bottom) '~°~~~~" -' ;a ` ~` ~~~~~ ~~",R+~'ti
Bottom Elevation ~ZJ. 75 fmsl (elevation of the bottom of the planting media)
Basin Dimensions
Basin Size " ~~ ft. x °`~ 3oZ ft. = aD~~d sq. ft. (surface area at basin bottom)
Basin Volume Provided _a CX-~~U c.f.
SWU-1.08 4.07
Page 1 of 4

2
basin I'yantings 'p~
Number of plantings required ~ stems (400 sterzzs per acre of bioretecztiocz area is rec/tci~-ed at cc nzininziuzz)
Total No. of plantings provided ~_ =Trees _~ + Slu•ubs 3q (at least 1 tree ,for every 3 slvccbs)
This system (clzeclc one) doe does not incorporate the use of an under-drain.
(Under-drains are not allowed for those projects that drain to class SA waters.)
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H .1000. These requirements are subject to change in
accordance with the manual and rules.
Initial in the space provided to indicate that the following design requirements have been inet and supporting
documentation is attached. If a requirement has not been met, attac)z written justification. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
LM a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
t_1~1 b. No vertical sand bed is proposed.
l.M c. The bioretention area is at least 15 feet wide by 40 feet long.
l-M d. A grass buffer strip and sheet flow conditions are provided at the inlet.
LM e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
1-!lA f. Ponding depth of 6-12" is provided.
LM g. In-situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
LhA h. An in-depth soils report is provided. (report should include soil types, boring log, map,
suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
LM i. The planting soil has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
placement specifications of the planting media are noted on the plans.
~ M j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater Best Management Practices Manual, including a low phosphorus content to
promote phosphorus removal. (P-Index of 20 to 40 is optimal.) hnclude a soils test, indicating
P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
~~ k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
(,~~ 1. A detailed planting plan; prepared by a qualified individual, is provided on the plans, This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizer
requirements, installation procedures, construction schedule; etc..
SVJU-l08 4.07
Page 2 of 4

,'
~_ m, Type of mulch layer and depth is specified on the plans.
L~+V- n. Plan and section details for the bioretention area are provided. (including dimensions and
elevations)
LM o. Plan details for the inlet and outlet structures are provided. (including dimensions and
elevations)
p. All side slopes stabilized with vegetated cover are no steeper than 3: ] (H:V).
Ll~ q. A benchmark is provided to determine the sediment accumulation in the basin area.
1~6-~1 r. Vegetated filter is provided for overflow and detail is shown on plans (Required nunimum
length is 50 feet for SA waters, 30 feet for other waters).
~ 1'`~ s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
L~ t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
IV. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc, shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every sigiuficant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re-seed, re-plant, and re-mulch as necessary to maintain good vegetative and
mulch cover.
Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over-excavating. Over-excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4, Replace, or add additional mulch as needed. Removal of the old mulch layer before applying the new layer is
recommended every 2 to 3 years.
5. Prune trees and shrubs and remove debris on an annual basis. Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and shrubs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed,
SWCJ-l08 4.U7
Page ~ of 4

` Mf3Y-16-20C1 11:55A FROM:TUCfCER & ASSOCIATES 336-632-D2D7 Tl]:8864458 P.2
8. Soil testing shall be conducted annually to determine pH and any accumulation of toxins in the planting media,
Lime or other alkaline substances shall be applied as recommended per the soil test and toxic soils shall be
removed, disposed of properly and replaced with new planting media.
9. All components of the bioretent:iotl area system shall be maintained in good working order.
10. If the Division determines that the system .is failing, the system will immediately be repaired to original design
specifications. If the system cannot be repaired to perform .its design function, other stormwater control devices
as allowed by NCAC 2H .1.000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the ten maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the
system or responsible party.
Print name; James Landing Commercial Park Owner's Association BY: Barry Siegal
Title: Manager/Member
Address: P • 0. Box 1.99 72
Phone;
Signature:
Greensboro, NC 27419.
Date: 5 / 1 6 ~7
lVOte: T'he 3egnlly responaible party should not be a homeowners association unless more than 50% of the lots have been sold and a
resident of the subdivision has been named the president.
I Carolyn Poulin , a Notary Public for Che State of North Carolina
County of Guilford , do hereby certify that Barry S. Siegal
personally appeared before me this 16 day of May ~ 2007 ,and acknowledge khe
due execution of the forgoing bioretention basin maintenance requirements. Witness my hand and official seal,
.~, ~- . •
°~ - ~ '~
V ti r~
SFAI.
My commission expi ~ ~v ~~~ ~~ '
v (~-~ ~ ~(J"'-'t--
~' ~ ,~,
~~-r~o~ ~ ~l T"ou
swu-~ os 4.0~
Page 4 of 4

Permit No.
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
BIORETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original.
(to be provided by DWQ)
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a Stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name : .~ ~ M ~ L~auOt ti.\ ~ Go M tit E 2C 1 Prl_ ~pt?,k.
Contact Person: Liso~ t~~~~CO~IS Phone Number: (33co) dam-' 4~a ~
For projects with multiple basins, specify which basin this worksheet applies to: ND ~ 3
(must match the DA # on the application & plans)
II. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. All elevations shall be in feet mean sea level
(fmsl).
Soils Report Summary
In-Situ Soil Type
In-Situ Soil Infiltration Rate
SHWT Elevation
Planting Soil Texture
Planting Soil Infiltration Rate
Basin Design Parameters
Drainage Area
Impervious Area
Design Storm
Design Volume
Inlet Velocity
Drawdown Time
Basin Elevations
~f~~l y ~ ?;tn;i
Temporary Pool Elevation X33, ~ fmsl (elevation of the bypass/outlet structure)
Planting Elevation ~~~ ot7 fmsl (elevation of the ground surface bottom) ~~`~ -
Bottom Elevation Q--~. ~7Jr' fmsl (elevation of the bottom of the planting fnedia)
Basin Dimensions
Basin Size A~~~~-~~~ ft. x ~ ft. _ _ q5 sq. ft. (surface area at basin bottom)
Basin Volume Provided ~~~~_ c.f.
)<,n
O ~ 4~ in./hr. (the most restrictive soil layer)
~ ' ~ ft. (Seasonal High Water Table elevation)
cYa ~ 1 ~ ~~ (must be a sandy loam, loanry sand, or loam texture)
C~ , ~ 5 in./hr.
1p~Q~rJ3 sq.ft. (on-site and off-site drainage to the basin)
~~~ 7 sq.ft. (on-site and off-site drainage to the basin)
1 inch (1.5 inch event for SA waters, 1 inch event for others)
,~_ c.f. (storage volume required)
--~ ~ 3 fns i ~y ~ ~ t.. ~.. ~ ii
~ c"Z hours c _".~ j ~
SP 6~*.._'t
SWU-108 4.07
Page 1 of 4

3
Basin Plantings
Number of plantings required ~J ~ stems (400 stems per acre of hioretention area is required at a minimuiai)
Total No. of plantings provided 8~ =Trees 15 + Shrubs 1.D5 (at least 1 tree for every 3 shrubs)
This system (check one) dos does not incorporate the use of an under-drain.
(Under-drains are not allowe or those projects that drain to class SA waters.)
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H .1000. These requirements are subject to change in
accordance with the manual and rules.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If a requirement has not been met, attach written justification. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
1.M a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
~M b. No vertical sand bed is proposed.
LM c. The hioretention area is at least 15 feet wide by 40 feet long.
LM d. A grass buffer strip and sheet flow conditions are provided at the inlet.
LM e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
LJIA f. Ponding depth of 6-12" is provided.
LM g. Iri-situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
I,.I~A h. An in-depth soils report is provided. (report should include soil types, boring log, map,
suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
LM i. The planting soil has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
placement specifications of the planting media are noted on the plans.
r-M j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater Best Management Practices Manual, including a low phosphorus content to
promote phosphorus removal. (P-Index of 20 to 40 is optimal.) Include a soils test, indicating
P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
LM k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
~~ 1. A detailed planting plan, prepared by a qualified individual, is provided on the plans. This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizer
requirements, installation procedures, construction schedule, etc..
SWU-108 4.07
Page 2 of 4

.~_ m. Type of mulch layer and depth is specified on the plans.
LIVI n. Plan and section details for the bioretention area are provided. (including dimensions and
elevations)
LM o. Plan details for the inlet and outlet structures are provided. (including dimensions and
elevations)
LM p. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
Ll~ q. A benchmark is provided to determine the sediment accumulation in the basin area.
LO~t r. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters).
~ r''t s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
~~ t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
IV. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc. shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every significant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re-seed, re-plant, and re-mulch as necessary to maintain good vegetative and
mulch cover.
Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over-excavating. Over-excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4. Replace, or add additional mulch as needed. Removal of the old mulch layer before applying the new layer is
recommended every 2 to 3 years.
5. Prune trees and shrubs and remove debris on an annual basis. Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and shrubs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed.
SWU-108 4.07
Page 3 of 4

MAY`-16-2001 11:55A FROM: TUCKER & ASSOCIATES 336-632-0207 T0: 8864458 P.Z
8. Soil testing shall be conducted annually to determine pH and any accumulation of toxins in the planting media.
Lime or other alkaline substances shall be applied as recommended per the soil test aad toxic soils shall be
removed, disposed of properly and replaced with new planting media.
9. All components of the bioretention area system shall be maintained in good working order.
10. If the Division determines that the system is failing, the system will immediately be repaired to original design
specifications. If the system cannot be repaired to perform its design function, other stot7rtwater control devices
as allowed by NCAC 2H .1.000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the ten maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the
system or responsible party.
Print name: James Landing Commercial Park Owner's Asssociat:ion BY: Barry Siegal
Title: Manager/Member
Address: P.O. Box 19972
Phone:
Greensboro, NC 27419
Signature: ~ .,~
Date: 5/1 h~07
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a
resident of the subdivision has been named the president.
I, Carolyn Poulin , a Notary Public for Che Slate of North Carolina
County of Guilford , do hereby certify that Barry S. Siegal
personally appeared before me this 16 day of May 2007 ,and acknowledge the
due execution of the forgoing bioretention basin maintenance requirements. Witness my hand and official seal,
,~ ~ .. _
°~ ., - ~ ,>
~. ~ _ -
,.
y 1 ~~
SEAL
My commission expi „~~ "~ r/ f ~~~ ~
~ ~ y~G~.
~' ~ ~,
~r~-r~o ~ ~ ~1 ~W
SWU-108 4.07
Page 4 of 4

t ,
Permit No.
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
BIORETENTION BASIN SUPPLEMENT
This form nzay be photocopied for use as an original.
(to be provided by DWQ)
DWQ Stormwater Management Plan Review:
A complete Stormwater management plan submittal includes a Stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name: ~H~~~S L/~.t~~D-tyL~ ~-(~N\1~/I~l~C1i41__. l?~K.
Contact Person: L~~~ Nic~D~Lc.~S Phone Number: (~) ~,,(~~ y~ a l
For projects with multiple basins, specify which basin this worksheet applies to: ~o, ~1'
(must match the DA # on the application. & plans)
II. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. All elevations shall be in feet mean sea level
(fmsl).
Soils Report Summary
In-Situ Soil Type
In-Situ Soil Infiltration Rate
SHWT Elevation
Planting Soil Texture
Planting Soil Infiltration Rate
Basin Design Parameters
Drainage Area
Impervious Area
Design Storm
Design Volume
Inlet Velocity
Drawdown Time
~ n~
O ~ ~O in./hr. (the most restrictive soil layer)
~ ft. (Seasonal High Water Table elevation)
~~1Y~y ~ ~C~I(Y1 (must be a sandy loam, loamy sand, or loam texture)
~ , 7 5 in./hr.
7~~O l00 Sq.ft. (on-site and off-site drainage to the basin)
X005 sq.ft. (on-site and off-site drainage to the basin)
~ inch (1.5 incli event for SA waters, 1 incl2 event for others)
~_ c.f. (storage volume required)
- b. a=-1 ~ fps ~ 4 . ~ ~ _
la hours €l~~ ~.~:~ § ~ ' ~' §?.' q'
Basin Elevations ~~'
~'~-'~ ~ w 200!
Temporary Pool Elevation ~~i , oC~ fmsl (elevation of the bypass/outlet structuf-e)
Planting Elevation ~~~ ~ fmsl (elevation of the ground surface bottom) ~~=n!r~ i ~~r-F s~ ~ ~~;`~ r,;
Bottom Elevation ~Jo~1G•-75 fmsl (elevation of the bottom of the planting media'~~t~'rv'~'`t '~' 4" "±~tir~'~3R.4aJC'k
Basin Dimensions
Basin Size ~~, q 7 ft. x ~_. ft. _ ~~~ sq. ft. (surface area at basi~z bottom)
Basin Volume Provided ~_ c.f.
SWU-108 4.07
Page 1 of 4

Basin Plantings f~,,~
Number of plantings required ~_ stems (400 stems per acre of bioretention area is rec~uirecl at a ~ni~ain2ui~a)
Total No, of plantings provided I ~~ =Trees o~C7 + Shrubs ~~ (at least 1 tree for ever~~ 3 shricbs)
This system (check one) does does not incorporate the use of an under-drain.
(Under-drains are not allowed for those projects that drain to class SA waters.)
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H .1000. These requirements are subject to change in
accordance with the manual and rules.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If a requiremezzt Izas not been met, attach written. justijtcatiozz. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
I-M a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
i-M b. No vertical sand bed is proposed.
LM c. The bioretention area is at least 15 feet wide by 40 feet long.
LM d. A grass buffer strip and sheet flow conditions are provided at the inlet.
LM e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
!~ f. Ponding depth of 6-12" is provided.
`M g. In-situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
Llv~ h. An in-depth soils report is provided. (report should include soil types, boring log, map,
suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
LM i. The planting soil has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
placement specifications of the planting media are noted on the plans.
L ~ j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater Best Management Practices Manual, including a low phosphorus content to
promote phosphorus removal. (P-Index of 20 to 40 is optimal.) Include a soils test, indicating
P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
~~ k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
~~ 1. A detailed planting plan, prepared by a qualified individual, is provided on the plans. This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizei-
requirements, installation procedures, construction schedule, etc.,
SWU-108 4.07
Page 2 of 4

r.
~._ m. Type of mulch layer- and depth is specified on the plans.
L!M n. Plan and section details for the bioretention area are provided. (including dimensions and
elevations)
LM o. Plan details for the inlet and outlet structures are provided. (including dimensions and
elevations)
p. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
(,D~l q. A benchmark is provided to determine the sediment accumulation in the basin area.
d~d~t r. Vegetated filter is provided for overflow and detail is shown on plans (Required nunimum
length is 50 feet for SA waters, 30 feet for other waters).
~ t''~ s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
~~ t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
IV. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc. shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every significant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re-seed, re-plant, and re-mulch as necessary to maintain good vegetative and
mulch cover.
3. Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over-excavating. Over-excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4. Replace, oi- add additional mulch as needed. Removal of the old. mulch layer before applying the new layer is
recommended every 2 to 3 years.
5. Prune trees and shrubs and remove debris on an annual basis. Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and slu-ubs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed
SWU-108 4.07
Page 3 of 4

MAY-16-2001 11:55A FROM: TUCKER & ASSOCIATES 336-632-D2D7 T0: 8864458 P.2
8. Soil testing shall be conducted annually to determine pH and any accumulation of toxins in the planting media,
Lime or ether alkaline substances shall be applied as recommended per the soil test and toxic soils shall be
removed, disposed of properly and replaced with new planting media.
9. All component`s of the bioretention area system shall be maintained in good working order.
10. If the Division determines that the system is failing, the system will immediately be repaired to original design
specifications. If the system cannot be repaired to perform .its design function, other stormwater control devices
as allowed by NCAC 2H .1.000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the ten maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the
system or responsible party.
Print name
Title: Manager/Member
Address:
Phone:
Signature:
Date: '~/ 161~.Z
l~lote: The legally responsible party should not be o homeowners association unless more then 50% of the lots have been sold and a
resident of the subdivision has been named the president.
I Carolyn Poulin , a Notary Public for the S[a[e of North Caxolina
County of Guilford , do hereby certify that Barry S. Siegal
personally appeared before me this 16 day of May ~ 2007 ,and acknowledge the
due execution of the forgoing bioretention basin maintenance requirements. Witness my hand and official seal,
,~,
~;; - ~ ';.
r~
.. 1 ~..
James Landing Commercial Park Ownexts Association BY: Barry Siegal
P.O. Box 19972
SEAL
My commission expi ~y ~~~ ~
~' ~ ,c,
C'r~-r~o ~ ~ ~J ~~
SWU-]O8 4.07
Page 4 of 4

Bio-retention Pond Worksheet
Project: Tucker/Siegal Site
Job No. E3295.05
Watershed Area: HIGH POINT LAKE WATERSHED
Area No.1
WQV=(P*Rv*DA)/12
Drainage Area = 55452 sf =
WQV= Water Quality Volume (Acre-feet)
P=Rainfall, inches
Rv=(volumentric runoff coefficient) = 0.05 + 0.009(1)
Impervious Area = 35818 sf =
1= % Imperviousness
DA=Drainage Area
Af = (WQV*df)/[k*(hf+df)*tf]
1.273 Ac
0.066974288 AC-ft
1
0.631335209
0.822 Ac
64.59
1.273 AC.
Af=surface area of bed, sq. ft.
df=filter bed depth (min. 3' or 4' depending on soil texture)
k=coefficient of permeability of filter media (assume 0.5 ft/day)
hf=average height of water above filter bed, ft (1/2 *hmax)
tf= design filter bed drain time, days (48 hours recommended)
WQV=Water quality treatment vol. (c.f)
Q=(2.3x10"5)(k)(A)(0 H/0 L)
Drawdown Time to Surface Soil
Ti-s=Vi-s/Q
Area Provided
Surface Area Required: 2500.63 sf
Length =
Width =
Depth =
78 ft
39 ft (avg.)
aft
G~ ,';~~
2500.63
3
0.5
0.5
2
2917.4
0.02876 CFs
12 HR
Surface Area Provided = 3042 sf
Ponding Depth = 1 ft

Volume Provided
Volume Required:
Volume Provided:
Underdrain Pipe Sizing
NxD=16'`((Q*n)/So.s)sie
No. pipes =
Pipe diameter =
2917.4 cf
3042 cf
0.89 ft. total Required
2,
0.44 ft. Required
Use 6 in.

Bio-retention Pond Worksheet
Project: Tucker/Siegal Site
Job No. E3295.05
Watershed Area: HIGH POINT LAKE WATERSHED
Area No.2
WQV=(P*Rv''DA)/12
Drainage Area = 35371 sf = 0.812 Ac
WQV= Water Quality Volume (Acre-feet) 0.046014214 AC-ft
P=Rainfall, inches 1
Rv=(volumentric runoff coefficient) = 0.05 + 0.009(1) 0.680007633
Impervious Area = 24760. sf = 0.568 Ac
1= % Imperviousness 70.00
DA=Drainage Area 0.812 AC.
Af = (WQV*df)/[k*(hf+df)*tfJ
Af=surface area of bed, sq. ft.
df=filter bed depth (min. 3' or 4' depending on soil texture)
k=coefficient of permeability of filter media (assume 0.5 ft/day)
hf=average height of water above filter bed, ft (1/2 *hmax)
tf= design filter bed drain time, days (48 hours recommended)
WQV=Water quality treatment vol. (c.f)
Q=(2.3x10-5)(k)(A)(0 H/0 L)
Drawdown Time to Surface Soil
T~-S=V.-S/Q
Area Provided
Surface Area Required: 1718.04 sf
Length = 64 ft
Width = 32 ft (avg.)
Depth = ft
1718.04
3
0.5
0.5
2
2004.38
0.01976 CFS
12 HR
Surface Area Provided = 2048 sf
Ponding Depth = 1 ft

Volume Provided
Volume Required: 2004.38 cf
Volume Provided: 2048 cf
Underdrain Pipe Sizing
NxD=16*((Q'`n)/so.s)sis 0.77 ft. total
No. pipes = 2
Pipe diameter = 0.39 ft.
Use 6 in.
Required
Required

Bio-retention Pond Worksheet
Project: Tucker/Siegal Site
Job No. E3295.05
Watershed Area: HIGH POINT LAKE WATERSHED
Area No.3
WQV=(P*Rv*DA)/12
Drainage Area = 60853 sf = 1.397 Ac
WQV= Water Quality Volume (Acre-feet) 0.079162745 AC-ft
P=Rainfall, inches 1
Rv=(volumentric runoff coefficient) = 0.05 + 0.009(1) 0.679998521
Impervious Area = 4259.7 sf = 0.978 Ac
1= % Imperviousness 70.00
DA=Drainage Area 1.397 AC.
Af = (WQV*df)/[k*(hf+df)*tf]
Af=surface area of bed, sq. ft.
df=filter bed depth (min. 3' or 4' depending on soil texture)
k=coefficient of permeability of filter media (assume 0.5 ft/day)
hf=average height of water above filter bed, ft (1/2 *hmax)
tf= design filter bed drain time, days (48 hours recommended)
WQV=Water quality treatment vol. (c.f)
Q=(2.3x10-5)(k)(A)(0 H/0 L)
Drawdown Time to Surface Soil
T~-S=V.-S/Q
Area Provided
Surface Area Required: 2955.71 sf
Length = 84 ft
Width = 41.8 ft (avg.)
Depth = 3 ft
2955.71
3
0.5
0.5
2
3448.33
0.03399 CFS
12 HR
Surface Area Provided = 3494.48 sf
Ponding Depth = 1 ft

Volume Provided
Volume Required: 3448.33 cf
Volume Provided: 3494.48 cf
Underdrain Pipe Sizing
NxD=16"((Q*n)/s0~5)3~8 0.94 ft. total
No. pipes = 2
Pipe diameter = 0.47 ft.
Use 6 in.
Required
Required

Bio-retention Pond Worksheet
Project: Tucker/Siegal Site
Job No. E3295.05
Watershed Area: HIGH POINT LAKE WATERSHED
Area No.4-CVS
WQV=(P*Rv*DA)/12
Drainage Area = 78060 sf = 1.792 Ac
WQV= Water Quality Volume (Acre-feet) 0.10733758 AC-ft
P=Rainfall, inches 1
Rv=(volumentric runoff coefficient) = 0.05 + 0.009(1) 0.71877402
Impervious Area = 58005; sf = 1.332 Ac
1= % Imperviousness 74.31
DA=Drainage Area 1.792 AC.
Af = (WQV*df)/[k*(hf+df)*tf]
Af=surface area of bed, sq. ft.
df=filter bed depth (min. 3' or 4' depending on soil texture)
k=coefficient of permeability of filter media (assume 0.5 ft/day)
hf=average height of water above filter bed, ft (1/2 *hmax)
tf= design filter bed drain time, days (48 hours recommended)
WQV=Water quality treatment vol. (c.f)
Q=(2.3x10-5)(k)(A)(0 H/0 L)
Drawdown Time to Surface Soil
Ti-s=Vi-s/Q
Area Provided
Surface Area Required: 4007.68 sf
Length = 97 ft
Width = 48.5 ft (avg.)
Depth = 3 ft
4007.68
3
0.5
0.5
2
4675.63
0.04609 CFS
12 HR
Surface Area Provided = 4704.5 sf
Ponding Depth = 1 ft

Volume Provided
Volume Required: 4675.63 cf
Volume Provided: 4704.5 cf
Underdrain Pipe Sizing
NxD=16"((Q*n)/so.s)sia 1.06 ft. total
No. pipes = 3
Pipe diameter = 0.35 ft.
Use 6 in.
Required
Required

0~-~lal
dip
Client _ ' ~.-~ CIL~ R ~ ~ 141~1~~5 L,~wl~l~ I..VM~M, 1 ~~Computed By ~, S ~(,~
Job No. ~ 3a~S. OS Date ~//3 ~~~
Project Description
Calculations For (~ CC-LL '- uC~-C7GIT 4~
DAVIS-MARTIN-POWELL & ASSOCIATES, INC.
218 GATEWOOD AVE., SUITE 102, HIGH POINT, NC 27262
Checked By
Date
Page ~ of _
(Revised, Superseded, and Void Calculations Must Be Clearly Identified,
Initialed, and Dated by the Responsible Individual)

o a

e
t
t
y`e
i
2~~
Appendices
~o= I .tom` La = C.o'
1.5 xc~so = t.SX 3 - q.5 ,~ ~~C~ il~~~ckne~ = clmo,,,p ~ l.5
USG (.~" _ ~ ~,
~- -o = o~ .q C-~5 Discharge (ft3/sec
c~,o = ~ a "
Curves may not be extrapolated.
Figure 8.06a Design of outlet protection protection from a round pipe flowing full, minimum tailwater condition (Tw ~ 0.5 diameter).
Rev. ' 12/93 8.06.3
s=
a~
N
n
a
c~
L
r_Q.
i
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- 3"

dmp
Client T lr K.ER
Job No.
Project Description INLET
Calculations For ~1 /,~. CEt...t... o~ '-V El-l~C lT1 ~S
DAVIS-MARTIN-POWELL & ASSOCIATES, INC.
218 GATEWOOD AVE., SUITE 102, HIGH POINT, NC 27262
Computed By ~~~
Date 7 I ~ 3 107
Checked By
Date
Page ~ of
(Revised, Superseded, and Void Calculations Must Be Clearly Identified,
Initialed, and Dated by the Responsible Individual)

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F~j l ,"7 e, EI_I_. NO. a CSLOt E 171 N C"~UT LET
Appendices
~lo= I,~
6~,a = 4~a5 c>=s
a
C~ s = 3"
~ma~: ~,~,c~~ =1.5,3=~.`~
USc to "
s o=3
Outlet W = Do + La = q ~
Pipe
diameter (Do) . ~j~
T ilwater < 0.5Do
~l
3 I 5 10
~?to= 4~a5cFs
50 100
Discharge (ft3/sec)

2 N
a
co
L
a
0
1 -"'o
~d5o- o.a
0
looo dam= 3"
Curves may not be extrapolated.
Figure 8.06a Design of outlet protection protection from a round pipe flowing full, minimum tailwater condition (Tw < 0.5 diameter).
~~
Rev. 12!93 $.06.3
i
1~a1`
t°~
tir°ti P~ ,so
~e~g .~~rlf~T'iltt ,
L~_~~
v.! = l7c + L a
\nt = 1 -t- ~ = Q
~ro n ~Th i ck~ 256 = C~ mc,~k x 1.5
-In°xl5-~~~

e
f
i
-~
Appendices
~~ C_E~~ No ~ (ou.TLET
coo= ~.~'
(SZ-~ = a . ~ a c i=s
d 5a = 3 "
dm~x= t.5 xc1,~ = I.S x 3 . ~,.5„
use ~"
~n_ ~ ~ ~
Curves may not be extrapolated.
Figure 8.06a Design of outlet protection protection from a round pipe flowing full, minimum tailwater condition (Tw < 0.5 diameter).
Rev. 12x93
5/~
Lam. _ ~ '
~ ~ = t +- to = `7
~v o n ~F1 i C_kn e56 = ~ (Y1C~. X ~ . S

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Rf
i
Q
Q
O
1
C5o'3~
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8.06.3
3 5 10 ZO 50 100 200 500 1000
(~ ~u = a,.0a c,-(r'S Discharge (ft3/sec)

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Client L.c(' ~LE2 .~ AhIIES L.At~p 1 r,L~ r ~~ N~ ~~Lf..IL Computed By LS~1
Job No. E3oZ~l'J. OS Date ~ I ~ ~ 10?
Project Description
Checked By
(Revised, Superseded, and Yoid Calculations Must Be Clearly Identified,
Initialed, and Dated by the Responsible Individual)
Calculations For ~ ~~ t"?v4,{~ ~[C I,.DCIT IBS Date
DAVIS-MARTIN-POWELL & ASSOCIATES, INC. ~ '~
218 GATEWOOD AVE., SUITE 102, HIGH POINT, NC 27262 Page of