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Home My WebLink About20090566 Ver 3_Stormwater Info_20111220� � v M�IQM�CrRE v � ATTENTION � NCDENR DWQ 2321 Crabtree Boulevard Raleigh NC 27699 Ms Annette Lucas LETTER OF TRANSMITTAL DATE December 20 2011 PROJECT NO 01517-0219 TASK NO � Caterpillar Office Building and Shop ��j-p�� TRANSMITfAL NO PAGE 1 OF 1 WE ARE SENDING ❑ Originals � Pnnts ❑ Shop Drawings ❑ Samples � Spec�ficat�ons � Calculatrons ❑ Other Quantrty Drawuig No Rev Descnptron , Status 2 RevLSed plan Sets for BNIl' s and Erosion Control Drawulgs 2 Rev�sed Calculatron Booklet 1 Comment Responses REMARKS Hi Annette Please fuld the enclosed the revised ulformaiaon for the Caterpillar Office Bu�idmg and Shop Please let us know �f you need any additronal ulformahon or �f you have any questions � � , � � � �, r� � 1 � �! � 3'� �` � ' � � "[� i IEi �,ti, r �L �TOR�J�VATEf� BF,A�CI� 1730 Vars ty D Swt 500 Rale gh NC 27606 919/233-8091 F 919/233-803] Cc McKIM & CREED, PA Signed �� Don Bataille December 20 2011 Ms Annette Lucas NCDENR - DWQ - 401 Permithng Unit 2321 Crabtree Blvd Suite 250 � Raleigh NC 27604 M&C 01517 0219 RE Caterp�llar Office Build�ng and Shop dated November 28 2011 Ms Lucas In response to your comments received on November 28 2011 we have revised the enclosed plans and we offer the followulg responses below Original comments are shown in BOLD 1 Please provide one or more plan sheets to show how the drainage areas are being reconfigured from the previously approved storm water management The origulal draulage area map (refer to DA-1) and a revised draulage map (refer to DA 3) is now included to address your comment 2 Please clearly label the newly proposed dnve in equipment shed and show the roof leaders and their outlet points on the plans Please clearly delineate the drainage area of the newly proposed wet detent�on basin The roof leaders for the proposed drive u1 shed are now shown in plan view (see sheet C1203) The deluieated drainage area for the wet detentron basin is now shown to reflect comments (refer to DA 3) Ms Annette Lucas December 20 2011 Page 2 of 2 3 The length to width raho of the pond should be 31 or larger Please reconfigure the pond to provide a longer flow path for the stormwater The wet detenhon basin has been revised to reflect comment The 31 raho was accomphshed by revising both the length of the pond and by regradulg the ulterior of the pond to direct water around a newly formed berm This lengthened the ratro to greater than 31 per comment Refer to sheets C1202 C1204 C1206 and C5103 4 Please modify the sect�on view of the wet detenhon basin to show the ten foot vegetated shelf The vegetated shelf is now labeled u1 the sechon view to reflect comment (refer to sheet C5103) 5 Please address the Neuse River Basin diffuse flow requirement either by providing a level spreader vegetated filter stnp at the outlet of the pond or be demonstrating that the existing channel has adequate capacity to convey the flow contributed by the wet detenhon pond without causing erosion within the channel Per State requ�rements for this area we are required to do a pre vs post analysis for the drainage area go�ng to the proposed wet detenhon pond A calculahon was performed to compare the existulg flows to the revised flows Please refer to the exishng swale calculahon If you have any questions during your review please do not hesitate to give me a call at 919 233 8091 Thank you for your help Suicerely Mc M& CREED P A /�� Don Bataille Attachments 2 sets of REVISED stormwater and erosion control plans Rev�sed stormwater calculahons Copy to Pro�ect f�le 1 ' � � � � 1 � 1 1 � 1 1 1 � ' � ' ' 401 SUPPLEMENTAL STORMWATER NARRATIVE & SUPPORTING CALCULATIONS _�� October 27, 2017 Rev�sed December 20, 2011 �J �� DEC 2 0 2011 �rtAfVDa'ANQ STORMWqTE BRANCK CATERPILLAR PRODUCT DEVELOPMENT CENTER OFFICE BUIDLING AND SHOP Clayton, Johnston County, North Carolina Prepared for CATERPILLAR, INC Prepared By McKim � Creed PA 1730 Varsity Drive Raleigh Norfh Carolina 27606 Phone (919) 233 8091 Fax (919) 233 8031 F1222 M&C Pro�ect No 01517-0219 �� - � ��j �� I8-/� �� .. �� ' I PROJECT DESCRIPITON ' The purpose of this pro�ect is to construct a 58 150 square foot Office Budding and a 16 000 square foot prefabncated shop budding for Caterpolar Inc This facdity is designed to replace the existing modular units that currently house Caterpolar s Product Development Center The ' existing 164 space parking area wdl be expanded to 286 parking spaces The expansion of the parking area wdl be located m the area of the existing modular urnts ' ' � ' This site currently has an approved stormwater management permit approval This approval included the approval of BMP #2 This BMP was never installed because the Office Budding was not constructed For this submittal the calculations for BMP #2 have been revised to reflect this construction The revised calculations are included in this submittal The third phase of the pro�ect wdl include construction of a Caterpolar corporate office budding The budding footpnnt wdl span approximately 31 800 sf and wdl be served by approximately 500 parking spaces Upon completion the modular urnts wdl be removed SITE DESCRIPTION The existing site is a 245 5 acre tract located in Clayton North Carolina The northeastern ' boundary of the site is formed by an approximate 3 000 frontage along the Neuse River The entire site drains directly to the Neuse River (WS V NSW) , The tract has elevations ranging from 320 MSL in the southwest porfion of the site to 150 MSL nearest to the Neuse River The average slope over the site is around 4% however several localized areas have existmg grades in excess of 20% ' SOILS 1 ll � t � ' ' � According to the Johnston County Generalized Sod Survey the ma�onty of uplands withm the site are classified as Cecd sandy loam (Ce) and Pacolet loam (Pa) Interspersed within the uplands are small pockets of Urdorthents loamy Along the banks of the Neuse River are the frequently flooded Wahadkee loam (Wt) and Chewacla loam (Ch) The followmg sod descnpt�ons are associated with the sods found on the site CeB - Cecd sandy loam at 2 to 6% slopes CeC - Cecd sandy loam at 6 to 10% slopes PaD Pacolet loam at 10 to 15% PaE Pacolet loam at 15 to 25% Ud - Urdorfhents loamy Wt Wahadkee loam frequently flooded Ch - Chewacla loam frequently flooded ' I STORMWATER IMPROVEMENTS ' This phase of the pro�ect wdl include construction of a permanent stormwater wet detention pond designed to attenuate the peak runoff rate for the 1 yr and 10-yr storm events as well as providmg TSS and Nitrogen reduction per the Town of Clayton s standards After completion of , this phase of construction the pond will capture the impervious surfaces from the office budding and a portion of the prefabncated shop The runoff from the office building wdl be captured m swales and sent mto the permanent natural draws that exist on the site ' ' u ' , , ' ' ' ' ' ' � ' � PLANNED EROSION AND SEDIMENTATION CONTROL PRACTICES 1 TEMPORARY GRAVEL CONSTRUCTION ENTRANCE/EXIT A temporary gravel construction entrance/exit wdl be installed at the entrance dnve to the site to provide a buffer area for construction vehicles to drop their mud and sediment to avoid transportmg it onto public roads 2 SIL7 FENCE Sdt fence wdl be installed m areas of fill around the penmeter of the site to maintain drainage into temporary diversion ditches Sdt fence wdl be used in natural outfall areas to prevent any sediment from ieaving the site 3 TEMPORARY DIVERSION DITCH Temporary diversion ditches wdl be provided to divert sediment laden water away from disturbed areas into sediment basins 4 TEMPORARY SKIMMER SEDIMEN7 BASIN A temporary skimmer sediment basins will be installed at the pro�ect site to retain sediment on the construction site and prevent sedimentation in the surrounding area MAINTENANCE Caterpolar wdl be responsible for permanent maintenance operations on the site Specific operation and maintenance schedules have been required for this pro�ect and are detaded in the provided Operation and Mamtenance Agreements ' ' IMPERVIOUS CALCULATIONS ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' IMPERVIOUS AREA BREAKDOWN Total Revised Area Descript�on Impervious o Change Imperv�ous Area (ac) Area (ac) Test Area - Phase t Intenor drives/loader pads/hopper char er area 4 89 N/A 4 89 Future Gravel/Sand Areas 2 34 N/A 2 34 Rear Dnve to test area 0 41 N/A 0 41 Test Area - Phase 2A Intenor Dnves 2 14 N/A 2 14 Oval Test Track (including future gravel areas 4$� N�A 4 81 Field Trench Test Area 1 21 N/A 121 Deadman w/J hook Area 0 41 N/A 0 41 Covered Test/Machine Storage area 0 28 N/A 0 28 Demuck Area 1 16 N/A 1 16 Test Area - Phase 26 Intenor Dnves 2 25 N/A 2 25 Vehicle Storage Area 0 93 N/A 0 93 Endurance Test Areas (3 total) 8 78 N/A 8 78 NCDOT Road 1 06 N/A 106 Pre Engineered Mamtenance Buildmg 0 09 N/A 0 09 Modular Urnts 0 73 0 73 0 Parking area for modular units and future cor orate buddin 5 7 0 73 6 43 Dnveways to and around site 2 44 N/A 2 44 Future Corporate budding 1 7 0 81 0 89 New Shop Budding 0 00 0 37 0 37 New Shop Sidewalks and Pad 0 00 0 39 0 39 Office Budding Drives 0 00 0 40 0 40 Total Impervious Acreage 41 33 41 68 Total Site Acreage (Including NCDOT R/W) 252 34 252 34 Total impervious % 16 38% 16 5296 ' , ' ' S II 1 ' C ' � �� 0 � � � � � � MAPS LJ ' ' ' ' 1 , , , � � � � � � 1 1 1 i BMP #2 , ' , � ' � 1 � � � � i � � � � � � 1 1S (new Subcat) Subcat Reach on Link 2S (new ubcat) 3P (new Pond) ' ' ' CAT Clayton - Office Buildmg & Shop 2011 '! 2 05 BMP #2 Prepared by Microsoft Printed 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Pa4e 2 Area Listing (all nodes) , Area CN Descnptron (acres) (subcatchment numbers) 13 380 70 Woods Good HSG C(1S 2S) , 2 357 74 >75% Grass cover Good HSG C(2S) 1 625 98 Paved parking & roofs (2S) ' 17 362 73 TOTAL AREA � ' 1J ' , � lJ ' � ' � ' ' ' � � CAT Clayton Office Budding & Shop 2011 12 05 BMP #2 Prepared by Microsoft Printed 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Pape 3 Soil Listing (all nodes) ' Area Soil Subcatchment (acres) Group Numbers ' 0 000 HSG A 0 000 HSG B 15 737 HSG C 1S 2S ' 0 000 HSG D 1625 Other 2S 77 362 TOTAL AREA , � � , ' ' ' ' , ' ' ' , ' ' ' CAT Clayton Office Budding 8 Shop 2011 12 05 BMP #2 Prepared by Microsoft Prmted 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Pape 4 Pipe L�sting (all nodes) ' Line# Node In Invert Out Invert Length Slope n Diam�dth Height Fdl Number (feet) (feet) (feet) (ft/ft) (mches) (inches) (inches) 1 3P 200 00 199 00 56 1 0 0178 0 013 18 0 0 0 0 0 ' ' ' ' ' ' ' ' ' ' ' ' ' ' , , �� ' � ' ' � , ' � � ' ' � � � � I�� CAT Clayton Office Budding & Shop 2011 12 05 BMP #2 Type ll 24 hr 1-Yr Ramfall=2 89 Prepared by Microsoft Printed 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HvdroCAD Software Solutions LLC PaQe 5 Time span=5 00-20 00 hrs dt=0 05 hrs 301 pomts Runoff by SCS TR-20 method UH=SCS Reach routing by Stor Ind+Trans method - Pond routing by Stor Ind method Subcatchment1S (newSubcat) RunoffArea=8 681 ac 0 00% Impervious Runoff Depth>0 57 Flow Length=l 054 Tc=47 5 min CN=70 Runoff=2 92 cfs 0 409 af Subcatchment2S (new Subcat) Runoff Area=8 681 ac 18 72% Impervious Runoff Depth>0 84 Flow Length=1 376 Tc=39 8 mm CN=76 Runoff=5 40 cfs 0 605 af Pond 3P (new Pond) Peak EIev=206 55 Storage=22 547 cf Inflow=5 40 cfs 0 605 af Pnmary=0 15 cfs 0 087 af Secondary=0 00 cfs 0 000 af Outflow=0 15 cfs 0 087 af Total Runoff Area =17 362 ac Runoff Volume =1 014 af Average Runoff Depth = 0 70 90 64% Pervious =15 737 ac 9 36% Impervious =1 625 ac i� ' t CAT Clayton Office Buddmg 8� Shop 2011 12 05 BMP #2 Type 1124 hr 1 Yr Ramfall=2 89' Prepared by Microsoft Printed 12/20/2011 HydroCAD� 9 10 s/n 04927 OO 2010 HydroCAD Sofiware Solutions LLC PaQe 6 Summary for Subcatchment 1S (new Subcat) ' Runoff = 2 92 cfs @ 12 53 hrs Volume= 0 409 af Depth> 0 57 Runoff by SCS TR 20 method UH=SCS Time Span= 5 00 20 00 hrs dt= 0 05 hrs ' Type II 24 hr 1 Yr Rainfall=2 89 Area (ac) CN Description ' 8 681 70 Woods, Good, HSG C _ 8 681 100 00% Pervious Area Tc Length Slope Velocity Capacity Description ' (min) (feet) (ft/ft) (ft/sec) (cfs) 36 3 150 0 0433 0 07 Sheet Flow, Woods Dense underbrush n= 0 800 P2= 3 50 ' 11 2 904 0 0730 1 35 Shallow Concentrated Flow, Woodland Kv= 5 0 fps 47 5 1 054 Total � ' � 1 1 � � � 1 ° LL , � 1 � ' ' , ' Subcatchmen41 S (new Subcat) Hydrograph 2 92 cfs Type 1124-hr 1-Yr Rainfall=2 89°' Runoff Area=8 681 ac Runoff Volume�0 409 Runoff Depth>0 57" �low Length=1,054° Tc=47 5 men CN=70 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ❑ Runoff ' ' , � CAT Clayton Office Budding & Shop 2011 12 05 BMP #2 Type 1124-hr 1 Yr Ramfa11=2 89" Prepared by Microsoft Printed 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Sofiware Solutions LLC Pape 7 Summary for Subcatchment 2S (new Subcatj Runoff = 5 40 cfs @ 12 39 hrs Volume= 0 605 af Depth> 0 84 Runoff by SCS TR 20 method UH=SCS Time Span= 5 00 20 00 hrs dt= 0 05 hrs ' Type II 24 hr 1 Yr Rainfall=2 89 Area (ac) CN Description � 1 625 98 Paved parking & roofs 4 699 70 Woods Good HSG C 2 357 74 >75% Grass cover, Good, HSG C ' 8 681 76 Weighted Average 7 056 81 28% Pervious Area 1 625 18 72% Impervious Area , � ' � Il � � ' ' � ' ' Tc Length Slope Velocity Capacity Descnption (min) (feefl (ft/ft) (ft/sec) (cfs) 33 5 120 0 0340 0 06 Sheet Flow, Woods Dense underbrush n= 0 800 P2= 3 50 0 1 43 0 3300 9 25 Shallow Concentrated Flow, Unpaved Kv= 161 fps 4 4 900 0 0450 3 42 Shallow Concentrated Flow, Unpaved Kv= 16 1 fps 1 8 313 0 0200 2 87 Shallow Concentrated Flow, Paved Kv= 20 3 fps 39 8 1 376 Total , ' ' ' 1 1 1 1 1 ' ' ' ' ' ' ' , ' ' CAT Clayton Office Budding & Shop 20'01 12 05 BMP #2 Type 1124 hr 1-Yr Ramfall=2 89" Prepared by Microsoft Pr�nted 12/20/2011 HydroCAD� 9 10 s/n 04927 �O 2010 HydroCAD Software Solutions LLC Paae 8 Subcatchment 2S (new Subcat) Hydrograph � � 0 LL 5 40 cfs Type II 24-hr 1 Yr Ratnfall=2 89'° Runoff Area=8 681 ac Runoff Volurne=0 605 af Runoff Depth>0 84°° Flow Length=1,376' Tc=39 8 m i n �, CN=76 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ❑ Runoff � t ' ' ' 1 1 , � ' � ' ' � ' ' ' � , CAT Clayton Office Budding & Shop 2011 12 05 BMP #2 Type 1124-hr 1-Yr Ramfa11=2 89" Prepared by Microsoft Pr�nted 12/20/2011 HydroCAD�I 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Paae 9 Summary for Pond 3P (new Pond) Inflow Area = 8 681 ac 18 72% Impervious Inflow Depth > 0 84 for 1 Yr event Inflow = 5 40 cfs @ 12 39 hrs Volume= 0 605 af Outflow = 015 cfs @ 20 00 hrs Volume= 0 087 af Atten= 97% Lag= 456 3 min Primary = 015 cfs @ 20 00 hrs Volume= 0 087 af Secondary = 0 00 cfs @ 5 00 hrs Volume= 0 000 af Routmg by Stor Ind method Time Span= 5 00-20 00 hrs dt= 0 05 hrs Peak Elev= 206 55 @ 20 00 hrs Surf Area=12 642 sf Storage= 22 547 cf Plug Flow detention time= 251 3 mm calculated for 0 087 af (14% of inflow) Center of Mass det time= 145 5 min ( 979 0- 833 5) Volume Invert Avad Storaqe Storaqe Descnption #1 204 50 76 131 cf Custom Stage Data (Irregular)Listed below (Recalc) Elevation SurF Area Perim Inc Store Cum Store Wet Area (feefl (sq ft) (feet) (cubic feet) (cubic feet) (sq ft) 204 50 8 503 388 0 0 0 8 503 205 00 10 442 419 0 4 728 4 728 10 504 206 00 11 848 438 0 11 138 15 866 11 869 207 00 13 323 457 0 12 578 28 444 13 294 208 00 15 017 476 0 14162 42 605 14 780 209 00 16 747 495 0 15 874 58 480 16 326 210 00 18 571 514 0 17 651 76131 17 933 Device Routinq Invert Outlet Devices _ #1 Pnmary 200 00 18 0 Round Culvert L= 561 RCP square edge headwall Ke= 0 500 Inlet / Outlet Invert= 200 00 / 199 00 S= 0 0178 P Cc= 0 900 n= 0 013 #2 Device 1 204 50 2 0 Vert Orifice/Grate C= 0 600 #3 Device 1 207 00 36 0 x 36 0 Horiz Orifice/Grate C= 0 600 Limited to weir flow at low heads #4 Secondary 208 00 21 0 long x 22 0 breadth Broad Crested Rectangular Weir Head (feet) 0 20 0 40 0 60 0 80 1 00 1 20 1 40 1 60 Coef (English) 2 68 2 70 2 70 2 64 2 63 2 64 2 64 2 63 Primary OutFlow Max=015 cfs @ 20 00 hrs HW=206 55 (Free Discharge) t=Culvert (Passes 015 cfs of 20 48 cfs potential flow) �2_Orif�ce/Grate (Orifice Controls 015 �fs @ 6 75 fps) 3—Orifice/Grate ( Controls 0 00 cfs) �econdary OutFlow Max=O 00 cfs @ 5 00 hrs HW=204 50 (Free Discharge) =Broad-Crested Rectangular Weir ( Controls 0 00 cfs) i ' ' CAT Clayton - Office Building & Shop 2011.12.05.BMP #2 Type 1124-hr 1-Yr Rainfall=2.89" Prepared by Microsoft Printed 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HvdroCAD Software Solutions LLC PaQe 10 Pond 3P: (new Pond) Hydrograph ■ Inflow 5.40 CfS � o�t�ow 6 Inflow Area=8.681 ac : se� dary Peak EIev=206.55' 5 Storage=22,547 cf 4 w � ; 3 � 0 LL 2 � .!''>/:iif!lf'��%riY%�f,%;/f�/1��',�".�'./.�,�✓x✓s''% .� . ,�'�./- _ , 0.15 cfs 0.00 cfs ��.�'-i%i�/'� . o ',' �' , : . 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) � I_ 1 � � � ' � � , ' ' � , , � � ' � ' CAT Clayton - Office Buildmg & Shop 2011 12 05 BMP #2 Type 1124-hr 2-Yr Ra�nfa11=3 50' Prepared by Microsoft Pnnted 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Paae 11 Time span=5 00-20 00 hrs dt=0 05 hrs 301 points Runoff by SCS TR 20 method UH=SCS Reach routing by Stor Ind+Trans method - Pond routing by Stor Ind method Subcatchment1 S(new Subcat) Runoff Area=8 681 ac 0 00% Impervious Runoff Depth>0 89 Flow Length=1 054 Tc=47 5 min CN=70 Runoff=4 92 cfs 0 640 af Subcatchment2S (new Subcat) Runoff Area=8 681 ac 18 72% Impervious Runoff Depth>1 22 Flow Length=1 376 Tc=39 8 min CN=76 Runoff=8 13 cfs 0 886 af Pond 3P (new Pond) Peak EIev=207 05 Storage=29 068 cf Inflow=8 13 cfs 0 886 af Primary=0 60 cfs 0 225 af Secondary=0 00 cfs 0 000 af Outflow=0 60 cfs 0 225 af Total Runoff Area =17 362 ac Runoff Volume =1 526 af Average Runoff Depth =1 05 90 64% Pervious =15 737 ac 9 36% Impervious =1 625 ac , CAT Clayton Office Bwiding & Shop ' 2011 12 05 �MP #2 Type 1124 hr 2 Yr Ra►nfa1/=3 50 Prepared by Microsoft Pnnted 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Sofiware Solutions LLC Pape 12 � Summa for Subcatchment 1 S(new Subcat) � ' ' ' ' 1 Runoff = 4 92 cfs @ 12 51 hrs Volume= 0 640 af Depth> 0 89 Runoff by SCS TR 20 method UH=SCS Time Span= 5 00 20 00 hrs dt= 0 05 hrs Type II 24 hr 2 Yr Rainfali=3 50 Area (ac) CN Description 8 681 70 Woods Good, HSG C 8 681 100 00% Pervious Area Tc Length Slope Veloaty Capacity Descnption 36 3 150 0 0433 0 07 Sheet Flow Woods Dense underbrush n= 0 800 P2= 3 50 11 2 904 0 0730 1 35 Shallow Concentrated Flow, Woodland Kv= 5 0 fps 47 5 1 054 Total , ' s � 4 1 '� 3 1 ' LL z 1 , 1 0 ' S ' ' ' Subcatchment 1 S (new Subcat) Hydrograph 4 92 cfs Type 19 24-hr 2-Yr Rainfall=3 50" Runoff Area=8 681 ac Runoff Volume=0 640 a Runoff Depth>0 89" �low Length=1,054' Tc=47 5 m i n CN=70 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ❑ Runoff � � � CAT Clayton Office Bwlding 8� Shop 201'0 12 05 BMP #2 Type ll 24-hr 2-Yr Ramfall=3 50" Prepared by Microsoft Pr�nted 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC PaQe 13 Summary for Subcatchment 2S (new Subcat) 1 Runoff = 813 cfs @ 12 38 hrs Volume= 0 886 af Depth> 1 22 Runoff by SCS TR 20 method UH=SCS Time Span= 5 00 20 00 hrs dt= 0 05 hrs ' Type II 24 hr 2 Yr Rainfall=3 50 Area (ac) CN Description , 1 625 98 Paved parking 8� roofs 4 699 70 Woods Good HSG C 2 357 74 >75% Grass cover, Good, HSG C ' 8 681 76 Weighted Average 7 056 81 28% Pervious Area 1 625 18 72°!o Impervious Area ' � ' ' lJ L� ' � � � ' ' Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 33 5 120 0 0340 0 06 Sheet Flow, Woods Dense underbrush n= 0 800 P2= 3 50 0 1 43 0 3300 9 25 Shallow Concentrated Flow, Unpaved Kv=16 1 fps 4 4 900 0 0450 3 42 Shallow Concentrated Flow, Unpaved Kv=161 fps 1 8 313 0 0200 2 87 Shallow Concentrated Flow, Paved Kv= 20 3 fps 39 8 1 376 Total ' ' ' , ' ' ' 1 ' 1 , ' � ' ' ' ' , ' CAT Clayton Office Building & Shop 2011 12 05 BMP #2 Type U 24-hr 2 Yr Ra�nfa11=3 50 Prepared by Microsoft Pr�nted 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Paqe 14 Subcatchment 2S (new Subcat� Hydrograph � � 0 LL � 3 E� 5 6 7 8 9 10 8 13 cfs 'Ty pe I I 24�h r 2-Yr Rainfail�3 50" Runoff Area=8 681 ac Runoff Volume=0 886 af Runoff Depth>1 22" Flow Length='0,376' Tc=39 8 min � CN=76 11 12 13 14 15 16 17 18 19 Time (hours) p Runoff '�J ' ' , ' ' ' � ' � ' CAT Clayton Office Budding & Shop 2011 12 05 BMP #2 Type 1124-hr 2-Yr Ramfall=3 50' Prepared by Microsoft Pr�nted 12/20/2011 NydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solufions LLC __ Paae 15 Summary for Pond 3P (new Pond) Inflow Area = 8 681 ac 18 72% Impervious Inflow Depth > 1 22 for 2 Yr event Inflow = 813 cfs @ 12 38 hrs Volume= 0 886 af Outflow = 0 60 cfs @ 15 73 hrs Volume= 0 225 af Atten= 93% Lag= 200 6 min Primary = 0 60 cfs @ 15 73 hrs Volume= 0 225 af Secondary = 0 00 cfs @ 5 00 hrs Volume= 0 000 af Routing by Stor Ind method Time Span= 5 00 20 00 hrs dt= 0 05 hrs Peak Elev= 207 05 @ 15 73 hrs Surf Area=13 400 sf Storage= 29 068 cf Plug Flow detention time= 2741 mm calculated for 0 225 af (25% of inflow) Center of Mass det time= 177 9 min (1 003 8 825 9) Volume Invert Avad Stora4e StoraQe Description #1 204 50 76131 cf Custom Stage Data (Irregular)Listed below (Recalc) Elevation SurFArea Perim Inc Store Cum Store Wet Area (feet) (sq ft) (feet) (cubic feet) (cubic feet) (sq ft) 204 50 8 503 388 0 0 0 8 503 205 00 10 442 419 0 4 728 4 728 10 504 206 00 11 848 438 0 11 138 15 866 11 869 207 00 13 323 457 0 12 578 28 444 13 294 208 00 15 017 476 0 14162 42 605 14 780 209 00 16 747 495 0 15 874 58 480 16 326 210 00 18 571 514 0 17 651 76131 17 933 Device Routin Invert Outlet Devices , #1 Pnmary 200 00 18 0 Round Culvert L= 561 RCP square edge headwall Ke= 0 500 Inlet / Outlet Invert= 200 00 / 199 00 S= 0 0178 /' Cc= 0 900 n= 0 013 ' #2 Device 1 204 50 2 0 Vert Ori�ce/Grate C= 0 600 #3 Device 1 207 00 36 0 x 36 0 Horiz Orifice/Grate C= 0 600 Limited to weir flow at low heads ' #4 Secondary 208 00 21 0 long x 22 0 breadth Broad Crested Rectangular Weir Head (feet) 0 20 0 40 0 60 0 80 1 00 1 20 1 40 1 60 Coef (English) 2 68 2 70 2 70 2 64 2 63 2 64 2 64 2 63 , u ' ' ' Primary OutFlow Max=O 56 cfs @ 15 73 hrs HW=207 05 (Free Discharge) t- =Culvert (Passes 0 56 cfs of 21 35 cfs potential flow) �2_OrificelGrate (Onfice Controfs 016 cfs @ 7 56 fps) 3-Orifice/Grate (Weir Controls 0 40 cfs @ 0 71 fps) �econdary OutFlow Max=O 00 cfs @ 5 00 hrs HW=204 50 (Free Discharge) =6road-Crested Rectangular Weir( Controls 0 00 cfs) CAT Clayton - Office Building & Shop 2011.12.05.BMP #2 Type 1124-hr 2-Yr Rainfa11=3.50" Prepared by Microsoft Printed 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Paqe 16 Pond 3P: (new Pond) Hydrograph ■ Inflow 8.13 cfs � oUmoW 9 Inflow Area=8.681 ac : se� dary $ Peak EIev=207.05' � � � Storage=29,068 cf w � 3 0 LL 0.60 cfs L � >�•��ii�i��isi�////////. � � � // ;'�/"/ //l/'�`"�� _ � � � �° � � � L� � � ' � � , ' , , � ' �� ' � , , ' � CAT Clayton Office Budding 8� Shop 2011 12 05 BMP #2 Type 1124-hr 10-Yr Ramfa1/=5 24 Prepared by Microsoft Pnnted 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Paae 17 Time span=5 00-20 00 hrs dt=0 05 hrs 301 points Runoff by SCS TR 20 method UH=SCS Reach routing by Stor Ind+Trans method - Pond routmg by Stor-Ind method Subcatchment1S (new Subcat) RunoffArea=8 681 ac 0 00% Impervious Runoff Depth>1 99 Flow Length=1 054 Tc=47 5 min CN=70 Runoff=11 79 cfs 1 439 af Subcatchment2S (new Subcat) Runoff Area=8 681 ac 18 72% Impervious Runoff Depth>2 49 Flow Length=1 376 Tc=39 8 min CN=76 RunofF=16 91 cfs 1 802 af Pond 3P (new Pond) Peak EIev=207 39 Storage=33 831 cf Inflow=16 91 cfs 1 802 af Pnmary=9 92 cfs 1 135 af Secondary=0 00 cfs 0 000 af Outflow=9 92 cfs 1 135 af Total Runoff Area =17 362 ac Runoff Volume = 3 241 af Average Runoff Depth = 2 24 90 64% Pervious =15 737 ac 9 36% Impervious =1 625 ac i � � ' ' CAT Clayton Office Budding 8� Shop 201'9 12 05 BMP #2 Type 1124-hr 10 Yr Ramfa11=5 24 Prepared by Microsoft Printed 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Paae 18 Sumrnary for Subcatchment 1 S(new Subcat) Runoff = 11 79 cfs @ 12 48 hrs Volume= 1 439 af Depth> 1 99 Runoff by SCS TR 20 method UH=SCS Time Span= 5 00 20 00 hrs dt= 0 05 hrs Type II 24 hr 10 Yr Rainfall=5 24 Area (ac) CN Description ' 8 681 70 Woods, Good, HSG C 8 681 100 00% Pervious Area ' Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 36 3 150 0 0433 0 07 Sheet Flow, Woods Dense underbrush n= 0 800 P2= 3 50 � 11 2 904 0 0730 1 35 Shailow Concentrated Flow, Woodland Kv= 5 0 fps 47 5 1 054 Total , ' 13 � �z ' „ ,o 1 9 8 � � � �6 LL 5 � 4 ' 2 1 � 5 6 , ' ' Subcatcha�nent 1 S (new Subcat) Hydrograph 11 79 cfs Ty pe I I 24-h r 10-Yr Rainfall=5 24" Runoff Area=8 681 ac Runoff Vo(ume=1 439 af Runoff Depth>1 99" Flow Length=1,054' � Tc=47 5 m � n CN=70 7 8 9 10 11 12 13 14 15 16 17 18 19 20 T�me (hours) p Runoff � , � CAT Clayton - Office Budding & Shop 2011 12 05 BMP #2 Type 1124-hr 10-Yr Ramfa1/=5 24' Prepared by Microsoft Pr�nted 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Paae 19 Summary for Subcatchment 2S (new Subcat) � Runoff = 16 91 cfs @ 12 37 hrs Volume= 1 802 af Depth> 2 49 Runoff by SCS TR 20 method UH=SCS Time Span= 5 00 20 00 hrs dt= 0 05 hrs � Type II 24 hr 10 Yr Rainfall=5 24 Area (ac) CN Description ' 1 625 98 Paved parking 8� roofs 4 699 70 Woods Good HSG C 2 357 74 >75% Grass cover, Good, HSG C ' 8 681 76 Weighted Average 7 056 81 28% Pervious Area 1 625 18 72% Impervious Area ' Tc Length Slope Velocity Capacity Description (mm) (feefl (ft/ft) (ft/sec) (cfs) 33 5 120 0 0340 0 06 Sheet Flow, 1 Woods Dense underbrush n= 0 800 P2= 3 50 01 43 0 3300 9 25 Shallow Concentrated Flow, Unpaved Kv=16 1 fps ' 4 4 900 0 0450 3 42 Shallow Concentrated Flow, Unpaved Kv=161 fps 1 8 313 0 0200 2 87 Shallow Concentrated Flow, Paved Kv= 20 3 fps 1 39 8 1 376 Total r � � t F-, �� ' � , � ' i ' ' ' � i � ' � , , � 1 � � i CAT Clayton - Office Building & Shop 2011 12 05 BMP #2 Type Il 24 hr 10-Yr Ramfall=5 24 Prepared by Microsoft Pr�nted 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Paqe 20 Subcatchment 2S (new Subcat) Hydrograph 13 ,2 -� 11 � ,o 09 �' 8 � �� i � i i i i. � i� ii. -. y� i i i i i. . �. , 16 91 cfs Ty pe 11 24-h r 10-Yr Rainfall=5 24" Runoff Area=8 681 ac Runoff Volume=1 802 af Runoff Depth>2 49" Flow Length=1,376' Tc=39 8 min ; �N=76 1�1 12 13 14 15 16 17 18 19 20 7ime (hours) ❑ Runoff � � ' ' � � � u � � � i , ' l� � r � i CAT Clayton Office Buddmg & Shop 2011 12 05 BMP #2 Type ll 24-hr 10-Yr Ra►nfa11=5 24" Prepared by Microsoft Pnnted 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Pa4e 21 Summary for Pond 3P (new Pond) Inflow Area = 8 681 ac 18 72% Impervious Inflow Depth > 2 49 for 10 Yr event Inflow = 16 91 cfs @ 12 37 hrs Volume= 1 802 af Outflow = 9 92 cfs @ 12 72 hrs Volume= 1 135 af Atten= 41 % Lag= 21 0 min Primary = 9 92 cfs @ 12 72 hrs Volume= 1 135 af Secondary = 0 00 cfs @ 5 00 hrs Volume= 0 000 af Routmg by Stor Ind method Time Span= 5 00-20 00 hrs dt= 0 05 hrs Peak Elev= 207 39 @ 12 72 hrs Surf Area=13 979 sf Storage= 33 831 cf Plug Flow detention time= 1291 min calculated for 1 135 af (63% of mflow) Center of Mass det time= 58 4 min ( 870 0 811 6) Volume Invert Avad Storage Storaqe Description #1 204 50 76131 cf Custom Stage Data (Irregular)Listed below (Recalc) Elevation Surf Area Perim Inc Store Cum Store Wet Area (feet) (sq ft) (feefl (cubic-feet) (cubic-feet) (sq ft) 204 50 8 503 388 0 0 0 8 503 205 00 10 442 419 0 4 728 4 728 10 504 206 00 11 848 438 0 11 138 15 866 11 869 207 00 13 323 457 0 12 578 28 444 13 294 208 00 15 017 476 0 14162 42 605 14 780 209 00 16 747 495 0 15 874 58 480 16 326 210 00 18 571 514 0 17 651 76131 17 933 Device Routina Invert Outlet Devices #1 Pnmary 200 00 18 0 Round Culvert L= 561 RCP square edge headwall Ke= 0 500 Inlet / Outlet invert= 200 00 / 199 00 S= 0 0178 P Cc= 0 900 n= 0 013 #2 Device 1 204 50 2 0 Ve�t Orif�ce/Grate C= 0 600 #3 Device 1 207 00 36 0 x 36 0 Horiz Or�fice/Grate C= 0 600 Limited to weir flow at low heads #4 Secondary 208 00 21 0 long x 22 0 breadth Broad Crested Rectangular We�r Head (feet) 0 20 0 40 0 60 0 80 1 00 1 20 1 40 1 60 Coef (English) 2 68 2 70 2 70 2 64 2 63 2 64 2 64 2 63 Primary OutFlow Max=9 83 cfs @ 12 72 hrs HW=207 39 (Free Discharge) t=Culvert (Passes 9 83 cfs of 21 93 cfs potential flow) �2=Orif�ce/Grate (Orifice Controls 018 cfs @ 8 07 fps) 3=0rifice/Grate (Weir Controls 9 65 cfs @ 2 05 fps) econdary OutFlow Max=O 00 cfs @ 5 00 hrs HW=204 50 (Free Discharge) Broad-Crested Rectangular Weir( Controls 0 00 cfs) CAT Clayton - Office Building 8� Shop 2011.12.05.BMP #2 Type 1124-hr 10-Yr Rainfa!l=5.24" Prepared by Microsoft Printed 12/20/2011 N��droCAD� 9 10 s/n 04927 OO 2010 HydroCAD Software Solutions LLC Paae 22 Pond 3P: (new Pond) Hydrograph ■ Inflow 16.91 cfs ; _ o�rnoW Inflow Area=8.681 ac � Primary ■ Secondary 18 � Peak EIev=207.39' ,�� , ;s�� Storage=33,831 cf ,4 , 13: , 2 , , 9.92 cfs � �� ,� w � ,o 0 9 ' LL 8- , 7= , „�; 6 , 5- � , , . ; � . , .. :�'��,� .- 2 3 � ._..�".�.<e'LlILt`///Jf///f/ �. �� Cf$ ��i�,��.��ii�',�. � .• ; /t, , �: p ��" � 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) � , � ' � � u � ' � ' r � � � 0 � � � CAT Clayton Office Buddmg 8� Shop 2011 12 05 BMP #2 Type 1124-hr 50-Yr Ramfal1=719" Prepared by Microsoft Pnnted 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Pape 23 Time span=5 00-20 00 hrs dt=0 05 hrs 301 points Runoff by SCS TR 20 method UH=SCS Reach routing by Stor Ind+Trans method Pond routing by Stor Ind method SubcatchmentlS (newSubcat) Subcatchment2S (new Subcat) Runoff Area=8 681 ac 0 00% Impervious Runoff Depth>3 43 Flow Length=l 054 Tc=47 5 min CN=70 Runoff=20 58 cfs 2 482 af Runoff Area=8 681 ac 18 72% Impervious Runoff Depth>4 07 Flow Length=1 376 Tc=39 8 mm CN=76 Runoff=27 55 cfs 2 942 af Pond 3P (new Pond) Peak EIev=207 76 Storage=39 114 cf Inflow=27 55 cfs 2 942 af Primary=22 54 cfs 2 270 af Secondary=0 00 cfs 0 000 af Outflow=22 54 cfs 2 270 af Total Runoff Area =17 362 ac Runoff Volume = 5 424 af Average Runoff Depth = 3 75 90 64% Pervious =15 737 ac 9 36% Imperv�ous =1 625 ac � � � � � CAT Clayton Office Budding & Shop 2011 12 05 BMP #2 Type II 24 hr 50 Yr Ramfa11=719' Prepared by Microsoft Printed 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HvdroCAD Sofiware Solutions LLC Paae 24 Sumrnary for Subcatchment 1S (new Subcat) Runoff = 20 58 cfs @ 12 47 hrs Volume= 2 482 af Depth> 3 43 Runoff by SCS TR 20 method UH=SCS Time Span= 5 00 20 00 hrs dt= 0 05 hrs Type II 24 hr 50 Yr Ramfall=719 Area (ac) CN Description � 8 681 70 Woods Good, HSG C 8 681 100 00% Penrious Area � Tc Length Slope Velocity Capacity Description (mm) (feet) (ft/ft) (ft/sec) (cfs) 36 3 150 0 0433 0 07 Sheet Flow, Woods Dense underbrush n= 0 800 P2= 3 50 � 11 2 904 0 0730 1 35 Shallow Concentrated Flow, Woodland Kv= 5 0 fps 47 5 1 054 Total � � 23 22 2, ' 2� 19 18 17 ' ,6 15 ,4 ,� 13 � _ ,2 o �� LL 1O � � s 5 4 ' 3 2 1 0 � � ' ' Subcatchment 1 S (new Subcat) Hydrograph 20 58 cfs , Ty pe I I 24-h r 50-Y� Rainfail=7 19'° Runoff Area=8 681 ac Runoff Volume=2 482 af Runoff Depth>3 43'° Flow Length=1,Q54' Tc=�7 5 m i n CN=70 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ❑ Runoff i ' � CAT Clayton Office Budding & Shop 2011 12 05 BMP #2 Type ll 24-hr 50-Yr Ra�nfal1=719' Prepared by Microsoft Pr�nted 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC PaQe 25 Summary for Subcatchment 2S (new Subcat) � Runoff = 27 55 cfs @ 12 36 hrs Volume= 2 942 af Depth> 4 07 Runoff by SCS TR 20 method UH=SCS Time Span= 5 00-20 00 hrs dt= 0 05 hrs � Type II 24 hr 50-Yr Rainfall=719 Area (ac) CN Description ' 1 625 98 Paved parking 8� roofs 4 699 70 Woods Good HSG C 2 357 74 >75% Grass cover, Good, HSG C 8 681 76 Weighted Average ' 7 056 81 28% Perwous Area 1 625 18 72% impervious Area � Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (�fs) 33 5 120 0 0340 0 06 Sheet Flow, ' Woods Dense underbrush n= 0 800 P2= 3 50 0 1 43 0 3300 9 25 Shallow Concentrated Flow, Unpaved Kv=16 1 fps 4 4 900 0 0450 3 42 Shallow Concentrated Flow, � Unpaved Kv=161 fps 1 8 313 0 0200 2 87 Shallow Concentrated Flow Paved Kv= 20 3 fps � 39 8 1 376 Total ' � � � � � , � ' � � � ' 1 ' � � � � � i i � � � � i CAT Clayton Office Building & Shop 2011 12 05 BNlP #2 Type ll 24-hr 50-Yr Rainfall=7 19 Prepared by Microsoft Printed 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC PaQe 26 Subcatchment 2S (new Subcat) Hydrograph 2a 26 z4 zz 20 ... 18 � � ,6 LL �4 12 ,o 5 6 7 8 9 10 27 55 cfs Ty pe I I 24�h r 50-Yr Ftainfall=7 19" Runoff Area=8 681 ac Runoff Volume=2 94� af Runoff Depth>4 07" Flow Length�1,376' Tc=39 8 m a n CN=76 11 12 13 14 15 16 17 18 19 20 Time (hours) ❑ Runoff � � � 1 ' � I� L� � ' � I _I � � � � l _� � � CAT Clayton Office Budding 8� Shop 2011 12 05 BMP #2 Type ll 24 hr 50-Yr Ra�nfa11=719" Prepared by Microsoft Pr�nted 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Paae 27 Summary for Pond 3P (new Pond) Inflow Area = 8 681 ac 18 72% Impervious inflow Depth > 4 07 for 50 Yr event Inflow = 27 55 cfs @ 12 36 hrs Volume= 2 942 af Outflow = 22 54 cfs @ 12 55 hrs Volume= 2 270 af Atten=18% Lag= 11 4 mm Primary = 22 54 cfs @ 12 55 hrs Volume= 2 270 af Secondary = 0 00 cfs @ 5 00 hrs Volume= 0 000 af Routing by Stor-Ind method Time Span= 5 00-20 00 hrs dt= 0 05 hrs Peak Elev= 207 76 @ 12 55 hrs Surf Area=14 609 sf Storage= 39114 cf Plug Flow detention time= 92 2 min calculated for 2 262 af (77% of inflow) Center-of Mass det time= 37 4 min ( 838 6 801 2) Volume Invert Avail Storaqe Storaqe Description #1 204 50 76131 cf Custom Stage Data (Irregular)Listed below (Recalc) Elevation Surf Area Perim Inc Store Cum Store Wet Area (feet) (sq ft) (feet) (cubic feet) (cubic feet) (sq ft) 204 50 8 503 388 0 0 0 8 503 205 00 10 442 419 0 4 728 4 728 10 504 206 00 11 848 438 0 11 138 15 866 11 869 207 00 13 323 457 0 12 578 28 444 13 294 208 00 15 017 476 0 14162 42 605 14 780 209 00 16 747 495 0 15 874 58 480 16 326 210 00 18 571 514 0 17 651 76131 17 933 Device RoutinQ Invert Outlet Devices #1 Pnmary 200 00 18 0 Round Culvert L= 561 RCP square edge headwall Ke= 0 500 inlet / Outlet Invert= 200 00 / 199 00 S= 0 0178 P Cc= 0 900 n=0013 #2 Device 1 204 50 2 0 Vert Orifice/Grate C= 0 600 #3 Device 1 207 00 36 0 x 36 0 Hor�z Orifice/Grate C= 0 600 Limited to weir flow at low heads #4 Secondary 208 00 21 0 long x 22 0 breadth Broad-Crested Rectangular Weir Head (feet) 0 20 0 40 0 60 0 80 1 00 1 20 1 40 1 60 Coef (English) 2 68 2 70 2 70 2 64 2 63 2 64 2 64 2 63 Pr�mary OutFlow Max=22 53 cfs @ 12 55 hrs HW=207 76 (Free Discharge) t— =Culvert (Inlet Controls 22 53 cfs @ 12 75 fps) �2=Orifice/Grate (Passes < 0 19 cfs potential flow) 3=0rifice/Grate (Passes < 26 21 cfs potential flow) �econdary OutFlow Max=O 00 cfs @ 5 00 hrs HW=204 50 (Free Discharge) =Broad Crested Rectangular Weir( Controls 0 00 cfs) CAT Clayton - Office Building & Shop 2011.12.05.BMP #2 Type 1124-hr 50-Yr Rainfal1=7.19" Prepared by Microsoft Printed 12/20/2011 HydroCAD� 9 10 s/n 04927 �O 2010 HydroCAD Software Solutions LLC Paqe 28 Pond 3P: (new Pond) Hydrograph ■ Inflow 27.55 cfs � o�cnoW � Inflow Area=8.681 ac p Se ondary 30 zs � :-�" Peak EIev=207.76' 26 . , 22.54 cfs Storage=39,114 cf z4 22 : 20- � �-� � 18. w � �g LL 14 . . ;; 12� 10 _ ✓'�� , � , 8 ' 6 i % . /. /,�r:?G •�..`1./�� -` � 3 �� 4 ' 0.00 CfS ': - �i?i�fTi�i.�: r �. _, o� � �� . . . ,.., .� 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) � ' LJ LI �I ' � ' ' ' , � � ' � � � l� ' CAT Clayton - Office Bwlding 8� Shop 2011 12 05 BMP #2 Type 1124-hr 100-Yr Ramfa/1=8 11 Prepared by Microsoft Prmted 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Paae 29 Time span=5 00-20 00 hrs dt=0 05 hrs 301 pomts Runoff by SCS TR 20 method UH=SCS Reach routmg by Stor Ind+Trans method - Pond routing by Stor Ind method Subcatchment1S (newSubcat) Subcatchment2S (new Subcat) Runoff Area=8 681 ac 0 00% Impervious Runoff Depth>4 16 Flow Length=1 054 Tc=47 5 min CN=70 Runoff=24 95 cfs 3 007 af Runoff Area=8 681 ac 18 72% Impervious Runoff Depth>4 84 Flow Length=1 376 Tc=39 8 min CN=76 Runoff=32 69 cfs 3 504 af Pond 3P (new Pond) Peak EIev=208 12 Storage=44 446 cf Inflow=32 69 cfs 3 504 af Primary=23 10 cfs 2 795 af Secondary=2 42 cfs 0 034 af Outflow=25 52 cfs 2 829 af Total Runoff Area =17 362 ac Runoff Volume = 6 511 af Average Runoff Depth = 4 50 90 64% Pervious =15 737 ac 9 36% Imperv�ous =1 625 ac ' ' , CAT Clayton Office Building & Shop 2011 12 05 B6VIP #2 Type ll 24 hr 100-Yr Ramfall=8 11 Prepared by Microsoft Prmted 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Paqe 30 Summary for Subcatchment 1 S(new Subcat) ' Runoff = 24 95 cfs @ 12 47 hrs Volume= 3 007 af Depth> 4 16 Runoff by SCS TR 20 method UH=SCS Time Span= 5 00 20 00 hrs dt= 0 05 hrs ' Type 1124 hr 100 Yr Rainfall=8 11 Area (ac) CN Description ' 8 681 70 Woods, Good, HSG C 8 681 100 00% Pervious Area � Tc Length Slope Velocity Capacity Descnption (min) (feet) (ft/ft) (ft/sec) (cfs) 36 3 150 0 0433 0 07 Sheet Flow Woods Dense underbrush n= 0 800 P2= 3 50 ' 11 2 904 0 0730 1 35 Shallow Concentrated Flow, Woodland Kv= 5 0 fps 47 5 1 054 Total ' ' zs � 24 22 ' 18 ,� ,6 3 14 ' o LL �2 ,o ' 8 6 ' 4 2 0 ' S 6 , , ' Subcatchment 1 S (new Subcat) Hydrograph 24 95 cfs Type II 2�-hr 100 Yr Rainfall=8 11" Runoff Area=B 681 ac Runoff Volurne=3 007 af Runoff Depth>416" Flow Length=1,054° ic=47 5 min � CN=70 8 9 10 11 12 13 14 15 16 17 18 19 20 T�me (hours) ❑ Runoff L�' � ' CAT Clayton Office Budding & Shop 2011 12 05 BMP #2 Type 1124-hr 100-Yr Ramfa11=8 11 " Prepared by M�crosoft Pnnted 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Paqe 31 Summary for Subcatchment 2S (new Subcat) ' Runoff = 32 69 cfs @ 12 36 hrs Volume= 3 504 af Depth> 4 84 Runoff by SCS TR 20 method UH=SCS Time Span= 5 00 20 00 hrs dt= 0 05 hrs � Type II 24 hr 100-Yr Rainfall=811 Area (ac) CN Descnption ' 1 625 98 Paved parking 8� roofs 4 699 70 Woods Good HSG C 2 357 74 >75% Grass cover, Good, HSG C __ _ ' 8 681 76 Weighted Average 7 056 81 28% Pervious Area 1 625 18 72% Impervious Area � , ' ' ' C' ' ' ' � , ' Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 33 5 120 0 0340 0 06 Sheet Flow, Woods Dense underbrush n= 0 800 P2= 3 50 01 43 0 3300 9 25 Shallow Concentrated Flow, Unpaved Kv= 161 fps 4 4 900 0 0450 3 42 Shallow Concentrated Flow, Unpaved Kv=16 1 fps 1 8 313 0 0200 2 87 Shallow Concentrated Flow, Paved Kv= 20 3 fps 39 8 1 376 Total , � , L_J 1 1 1 1 ' ' ' � ' ' ' ' ' , , CAT Clayton Office Buildmg & Shop 2011 12 05 BMP #2 Type 1124 hr 100-Yr Ramfall=8 11 Prepared by Microsoft Pr�nted 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Paqe 32 Subcatchment 2S (new Subcat) Hydrograph '� 2� 3 18 LL is ,4 ,z ,o 5 6 7 8 9 10 32 69 cfs Type II 24-hr 100-Yr Rainfall=811" Runoff Area=8 681 ac Runoff Volume=3 504 af Runoff Depth>4 84" Flow Length=1,376' Tc=39 8 m i n CN=76 11 12 13 14 15 16 17 18 19 Time (hours) p Runoff ' ' ' CAT Clayton Office Building 8� Shop 2011 12 05 BMP #2 Type 1124-hr 100-Yr Ra�nfa11=8 11 Prepared by Microsoft Pr�nted 12/20/2011 HydroCAD� 9 10 s/n 04927 O 2010 HydroCAD Sofiware Solutions LLC Paqe 33 Summary for Pond 3P (new Pond) ' Inflow Area = 8 681 ac 18 72% Impervious Inflow Depth > 4 84 for 100 Yr event Inflow 32 69 cfs @ 12 36 hrs Volume= 3 504 af Outflow = 25 52 cfs @ 12 57 hrs Volume= 2 829 af Atten= 22% Lag=13 0 min ' Primary = 2310 cfs @ 12 57 hrs Volume= 2 795 af Secondary = 2 42 cfs @ 12 57 hrs Volume= 0 034 af ' � ' , � ' L � � ' �' , , , Routing by Stor Ind method Time Span= 5 00 20 00 hrs dt= 0 05 hrs Peak Elev= 20812 @ 12 57 hrs Surf Area=15 223 sf Storage= 44 446 cf P1ug F{ow detention time= 85 2 min calculated for 2 829 af (81 % of inflow) Center of Mass det time= 34 7 min ( 832 0 797 4) Volume Invert Avad StoraQe Storage Descnption #1 204 50 76 131 cf Custom Stage Data (irregular)Listed below (Recalc) Elevation SurF Area Perim Inc Store Cum Store Wet Area (feet) (sq ft) (feet) (cubic feet) (cubic feet) (sq ft) 204 50 8 503 388 0 0 0 8 503 205 00 10 442 419 0 4 728 4 728 10 504 206 00 11 848 438 0 11 138 15 866 11 869 207 00 13 323 457 0 12 578 28 444 13 294 208 00 15 017 476 0 14162 42 605 14 780 209 00 16 747 495 0 15 874 58 480 16 326 210 00 18 571 514 0 17 651 76131 17 933 Device Routmq invert Outlet Devices #1 Primary 200 00 18 0 Round Culvert L= 561 RCP square edge headwall Ke= 0 500 Inlet / Outlet Invert= 200 00 / 199 00 S= 0 0178 /' Cc= 0 900 n=0013 #2 Device 1 204 50 2 0 Vert Or�fice/Grate C= 0 600 #3 Device 1 207 00 36 0 x 36 0 Horiz Orifice/Grate C= 0 600 Limited to weir flow at low heads #4 Secondary 208 00 21 0 long x 22 0 breadth Broad Crested Rectangular Weir Head (feet) 0 20 0 40 0 60 0 80 1 00 1 20 1 40 1 60 Coef (English) 2 68 2 70 2 70 2 64 2 63 2 64 2 64 2 63 Primary OutFlow Max=23 10 cfs @ 12 57 hrs HW=20812 (Free Discharge) t— =Culvert (Inlet Controls 23 10 cfs @ 13 07 fps) �2=Orifice/Grate (Passes < 0 20 cfs potential flow) 3=0rifice/Grate (Passes < 45 81 cfs potential flow) �econdary OutFlow Max=2 26 cfs @ 12 57 hrs HW=20812 (Free Discharge) =6road Crested Rectangular Weir (Weir Controls 2 26 cfs @ 0 92 fps) CAT Clayton - Office Building & Shop 2011.12.05.BMP #2 Type 1124-hr 100-Yr Rainfall=8.11" Prepared by Microsoft Printed 12/20/2011 HydroCAD� 9.10 s/n 04927 O 2010 HydroCAD Software Solutions LLC Paqe 34 Pond 3P: (new Pond) Hydrograph ■ Inflow 32.69 cfs :_-: o�cnoW 36 ,� f Inflow Area=8.681 ac � Primary ■ Secondary �: r . 34 � ;- , , '° �.; Peak EIev=208.12' 30 ' 25.52 cfs 28 Storage=44,446 cf 2s : 23.10 cfs :: 2a , z2 N '� 2� u 3 18 , � LL 16 , 14 � 12 ' �o ��1�I.' � ; �'� �'��r ,,4�'e*�` �"�3f ��P � ^�,� 4� , 5 6 Ir . � / ��lw! ��s+" . � � � '�.� � ��,� r fi t�` � m� y .�' � �� • ///�i�i��/�� /{ -. .�il�� /�/�.d�'�; �,�% .a�� `, .�' _ ,�: r :. • xaF ',�,�' 1 � � � � r r � � �� J 1 � � � � t � t � � s ET DETENTION W P D ALCULATIONS ON C ! i 1 ' ' ' , ' , , ' ' � ' � , , ' ' WATER QUALITY POND CALCULATIONS Pro�ect Name Caterpillar Product Development Center Pro�ect Number 01517 0219 Date December 5 2011 3rd revision 2nd revision 1 st revision 20 Dec-11 , � � � � � � , , � � ' , � ' ' ' � ' Water Quality Pond Dramage Area Data Pro�ect Pro�ect No Date Total site area Caterpolar Product Development Center 01517 0219 December 20 2011 378144 square feet = 8 68 acres Drama e area to ond Other Draina e Area Existing Proposed Change Existing Proposed Im ervious areas s s s s s On site buildm s 0 0 0 0 0 On site streets 0 0 0 0 0 On site arkin 0 0 0 0 0 On site sidewalks 0 0 0 0 0 Other on site 0 70 785 70 785 0 0 Total off site im ervious 0 0 0 0 0 Total im ervious 0 70 785 70 785 0 0 Draina e area to ond Other Draina e Area Existing Proposed Change Existing Proposed Non im ervious areas s s s s s On site rass/landsca e 0 0 0 0 0 On site woods 368 466 65 616 302 850 0 0 Other undevelo ed 0 241 752 241 752 0 0 Total off site non im ervious 0 0 0 0 0 Tota( non im ervrous 368 466 307 368 -61 098 0 0 Total Dra Percent i Notes Area 378 144 ious 0 0 2011 12 15 BMP#2 xls Site Drainage Area Data 378144 187 Page 2 of 17 0 3 167 850 3 167 850 187 00 00 Prmted 12/20/2011 7 20 AM �_� � ' lJ ' � Water Quality Pond Surface Area Calculations Pro�ect Caterpillar Product Development Center Pro�ect No 01517 0219 Date December 20 2011 Total on site drainage area to pond 378 144 square feet Total impervious area m drainage area 70 785 square feet Average water depth of basin at normal pool 3 0 feet Location of site Johnston County � Site region Piedmont % Impervious cover 18 7 percent ' If the site is m a coastal area will a ve etative filter be used� n/a 9 � r � � � , , , , � � Surface Area/Drainage Area Ratios For a site in the Piedmont (85%) 0 9 percent For a site in the Piedmont (90%) 1 4 percent For a site in a Coastal County w/ Vegetative Fdter 1 6 percent For a site in a Coastal County w/out Vegetative Filter 2 3 percent Required surface area of pond For a site in the Piedmont (85%) 3 490 0 square feet For a site m the Piedmont (90%) 5 390 0 square feet For a site in a Coastal County w/ Vegetative Filter 6 050 0 square feet For a site in a Coastal County w/out Vegetative Filter 8 550 0 square feet Notes 2011 12 15 BMP#2 xls Pond Su�face Area Calcs Page 3 of 17 Printed 12/20/2011 7 20 AM � � ' � � r , � ' � ' � ' � � � i 1 ' Water Quality Pond Stormwater Runoff Volume Calculat�ons Pro�ect Caterpillar Product Development Center Pro�ect No 01517 0219 Date December 20 2011 Drainage area 378 144 square feet Impervious area 70 785 square feet Ramfall depth 1 00 mches Percent Impervious 18 7 percent R(v)=0 05+0 009'`(Percent impervious) Runoff coefficient R(v) 0 22 in/in Runoff volume=(Design ramfall)"(R(v))*(Drainage area) Runoff volume 6 884 5 cubic feet Notes 2011 12 15 BMP#2 xls Runoff Volume Calcs Page 4 of 17 Printed 12/20/2011 7 20 AM � � ' L, , � � � u , � i 1 f 1 � 1 i I Water Quality Pond Volume Calculations Stage-Storage Data for Pond Temporary Pool Pro�ect Caterpolar Product Development Center Pro�ect No 01517 0219 Date December 20 2011 Incremental Incremental Incremental Incremental Cumulative Cumulative Contour ID Stage Area Area Area Area volume volume volume volume s ft acres ft acres cu ft acre ft cu ft acre ft 2045 0 85034 0195 85034 02 00 00 00 00 205 0 5 10 441 6 0 240 1 938 2 0 0 4 736 3 0 1 4 736 3 0 1 205 25 0 75 10 745 9 0 247 304 3 0 0 2 648 4 0 1 7 384 7 0 2 206 1 5 11 848 0 0 272 1 102 0 0 0 8 472 7 0 2 15 857 4 0 3 207 2 5 13 3231 0 306 1 475 2 0 0 12 585 5 0 3 28 442 9 0 5 208 35 150167 0345 16936 00 141699 03 426129 06 209 4 5 16 746 6 0 384 1 729 9 0 0 15 881 7 0 4 58 494 5 0 7 210 55 185712 0426 18245 00 176589 04 761534 08 2011 12 15 BMP#2 xls ' Stage Storage (Temp Pool) Page 5 of 17 Printed 12/20/2011 7 20 AM ! i � , � � ' ' � � i � � � � 1 1 1 Water Quality Pond Volume Calculations Stage-Storage Data for Pond Permanent Pool Pro�ect Caterpillar Product Development Center Pro�ect No 01517 0219 Date December 20 2011 Incremental Incremental Incremental Incremental Cumulative Cumulative Contour ID Stage Area Area Area Area volume volume volume volume ft acres ft acres cu ft acre-ft cu ft acre ft 195 0 1200 0003 1200 00 00 00 00 00 196 1 378 0 0 009 258 0 0 0 249 0 0 0 249 0 0 0 197 2 700 0 0 016 322 0 0 0 539 0 0 0 788 0 0 0 198 3 1 086 0 0 025 386 0 0 0 893 0 0 0 1 681 0 0 0 199 4 1 626 0 0 037 540 0 0 0 1 356 0 0 0 3 037 0 01 200 5 2 302 0 0 053 676 0 0 0 1 964 0 0 0 5 001 0 01 201 6 3 086 0 0 071 784 0 0 0 2 694 0 01 7 695 0 0 1 202 7 4 084 0 0 094 998 0 0 0 3 585 0 0 1 11 280 0 01 203 8 51880 0119 11040 00 46360 01 159160 02 204 9 6 398 0 0 147 1 210 0 0 0 5 793 0 01 21 709 0 0 2 204 5 9 5 8 503 0 0 195 2 105 0 0 0 3 725 3 0 1 25 434 3 0 2 2011 12 15 BMP#2 xls ' Stage Storage (Perm Pool) Page 6 of 17 Pnnted 12/20/2011 7 20 AM i 1 ' � � L � , ' � � � , � � t � � Water Qual�ty Pond Volume Calculat�ons Stage-Storage Data for Pond Forebays Pro�ed Caterpolar Product Development Center Pro�ect No 01517-0219 Date December 20 2011 Incremental Incremental Incremental Incremental Cumulat�ve Cumulative Contour ID Stage Area Area Area Area volume volume volume volume s ft acres s ft acres cu ft acre ft cu ft acre ft 199 0 900 0002 900 00 00 00 00 00 200 1 254 0 0 006 164 0 0 0 172 0 0 0 172 0 0 0 201 2 497 0 0 011 243 0 0 0 375 5 0 0 547 5 0 0 202 3 819 0 0 019 322 0 0 0 658 0 0 0 1 205 5 0 0 203 4 12180 0028 3990 00 10185 00 22240 00 204 5 1 664 0 0 038 446 0 0 0 1 441 0 0 0 3 665 0 0 1 204 5 5 5 2 634 0 0 060 970 0 0 0 1 074 5 0 0 4 739 5 01 2011 12 15 BMP#2 xls � Stage Storage (Forebays) Page 7 of 17 Printed 12/20/2011 7 20 AM � � � ' ' � � � , r s � � � t � � � ' Water Quality Basin Dewatering Time Calcutations Pro�ect Caterpillar Product Development Center Pro�ect No 01517 0219 Date December 20 2011 Maximum surface area of basin 10 507 square feet Maximum head of water above dewatermg hole 2 50 feet Onfice coefficient 0 60 Diameter of each hole 2 0 inches Number of holes 1 Cross sectional area of each hole = Cross sectional area of each hole = Cross sectional area of dewatering hole(s) _ Cross sectional area of dewatering hole(s) _ Dewatering time for basin = Dewatenng time for basin = 0 022 square feet 3 1 square inches 0 022 square feet 3 1 square inches 87 9 hours 3 66 days ' ' � � ' � � � � ' ' � � ' � � � � ' Water Quality Pond Summary Information Pro�ect Caterpillar Product Development Ce Pro�ect No 01517 0219 Date December 20 2011 Drainage area to pond 378 144 square feet = 8 68 acres Impervious area in drainage area 70 785 square feet = 1 63 acres Bottom of pond elevation 198 00 feet Normal pool elevation 204 50 feet Pond volume at normai pool 28 833 cubic feet Required volume for design rainfall 6 884 cubic feet Required surface area for pond 3 490 square feet Volume provided for storage of design ramfall = 7 385 cubic feet at elevation 205 25 Surface area provided at normal pool 8 503 square feet 2011 12 15 BMP#2 xls Summary Data Page 9 of 17 Prmted 12/20/2011 7 20 AM � � �I � � � � '� � r � DW SUPPLEMENT � � � 0 C� � �� , ' , Permit No (to be provided by DWQ) ' �� NCDENR ' � ' 0�� W AT F9pG � � � y Q T STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This (orm must be filled out pnnted and submitted The Reqmred llems Checklist (Part lll) must be panted filled out and submitted along with all ofthe requ�red mformat�on I PROJECT INFORMATION Pro�ect name Caterpolar Product Development Center Contact person Don Bataille McKim & Creed Phone number (919) 233-8091 Date 2aDec t t Dremage area number � � II DESIGN INFORMATION Site Charactenstics Drainage area 378 �44 ft� ' Impervious area post�levelopment 70 785 {� /o impervious 18 72 � Design rainfall depth 1 0 in � Storage Volume Non SA Waters Mmimum volume required Volume prowded � � ' � � � u � � � Storage Volume SA Waters 15 runoff volume Pre�evelopment 1 yr 24 hr runoff Post-development 1 yr 24-hr runoff Mmimum volume reqwred Volume provided Peak Flow Calculations Is the prelpost control of the 1 yr 24hr storm peak flow reqwred? 1 yr 24 hr rainfall depth Rational C pre-development Rational C post-development Rainfall intensity 1 yr 24 hrstortn Pre-development 1 yr 24hr peak flow Post�ievelopment 1 yr 24hr peak flow PrelPost 1 yr 24 hr peak flow control Elevabons Temporary pool elevation Permanent pool elevation SHWT elevation (approx at the perm pool elevation) Top of 10ft vegetated shelf elevation BoBom of 10ft vegetated shelf elevation Sediment cleanout top elevation (bottom of pond) Sediment cleanout bottom elevation Sediment storage prowded Is there adddional volume stored above the state-required temp pool� Elevation of the top of the additional volume Form SW401 Wet Detenhon BasirrRev &9/77/09 6 885 ft� 7 222 �3 ft ft3 ft ft OK OK volume provided is equal to or in excess of volume reqwred Y (Y or N) 2 9 in 0 70 (unitless) 0 83 (unitless) 012 m/hr OK 2 92 ft /sec 015 ft3/sec 2 77 ft3/sec 210 00 fmsl 204 50 finsl fmsl 205 00 fmsl 204 00 fmsl 198 00 fmsl 195 00 fmsl 3 00 ft N (Y or N) 210 0 fmsl Data not needed for calculation option #1 but OK �f provided Data not needed for calculation option #1 but OK rf provided OK Parts I 8 II Dflsign Summary Page 1 of 2 � Pertnit No (to be piovrded by DWQ) � � ' � ' � � � � � � � � � , � � � II DESIGN INFORMATION Surface Areas Area temporary pool S 305 it� Area REQUIRED pertnanent pool Z 231 f� SAIDA ratio 0 59 (un�tless) Area PROVIDED permanent pool Py�,,,� 8 305 � OK Area bottom of 10ft vegetated shelf Ae ,�, n 6 398 � Area sediment cleanout top elevation (bottom of pond) A��o„d 1 086 � Volumes Volume temporary pool Volume permanent pool VP �,�� Volume forebay (sum of forebays rf more than one forebay) Forebay /o of pertnanent pool volume SAIDA Table Data Design TSS removal Coastal SAIDA Table Used� MountamlPiedmont SAIDA Table Used� SA/DA ratio Average depth (used m SA/DA table) Calculation option 1 used� (See Figure 10 2b) Volume permanent pool V��,� Area provided permanent pool AP�,,,�� Average depth calculated Average depth used m SAIDA d�, (Round to nearest 0 5ft) Calculation option 2 used� (See Frc�ure 10 2b) Area provrded permanent pool A��,� Area bottom of 10ft vegetated shelf Ab , h�n Area sediment cleanout top elevation (bottom of pond) Ab �,� Depth (d�stance blw bottom of 10ft shelf and top of sediment) Average depth calculated Average depth used m SAIDA d�, (Round to nearest 0 5ft) Drawdown Calculations Drawdown through onfice� Diameter of orrfice (rf circular) Area of onfice (if non-circular) Coefficient of discharge (Cp) Dnvmg head (H ) Drawdown through wei� Weir iype Coefficient of discharge (C ) Length of weir (L) Dnumg head (H) Pre-development 1 yr 24hr peak flow Post-development 1 yr 24hr peak Bow Storage volume discharge rate (through d�scharge orrtice or weir) Storage volume drawdown time Additional Information Vegetated side slopes Vegetated shelf slope Vegetated shelf width Length of flowpath to width raho Length to width ratio Trash rack for overflow 8 orrf'ice7 Freeboard provided Vegetated filter provided? Recorded dramage easement provided� Capures all runoff at uftimate bwld-out? Drain mechanism for maintenance or eme�genaes �s Fortn SW407 Wet DetenGon Bas�n-Rev &9/17l09 7 222 (� OK 25 434 it� 4 740 ft3 18 6 /o /o OK 90 � N (Y or N) Y (Y or N) 0 59 (un�tless) Y (Y or N) 25 434 �3 8 305 RZ 3 00 ft 30ft (Y or N) 8 305 � 6 398 � 1 086 il� 6 00 ft ft Y (Y or N) 2 00 in mZ 0 60 (uniBess) 2 50 ft (Y or N) (umtless) (umtless) ft ft 2 92 ft�lsec 015 {��sec 0 07 $3/sec 3 66 days OK OK OK draws down in 2 5 days 3 1 OK 10 1 OK 10 0 ft OK 3 1 OK 2 3 1 OK Y (Y or N) OK 20ft OK N (Y or N) OK Y (Y or N) OK Y (Y or N) OK Gate valve at bottom of pond and pump rf needed Parts I& II Oesign Summary Page 2 of 2 � ' ' ' � ' ' ' � ' � ' Permit No (to be prowded by DWQ) III REQUIREp It�MS CHECKLIST "., � ,�'� �* ' � � � ��.'� ��`�; � � �� .�� ""� � � � � ' � Please indicate the page or plan sheet numbers whe�e the supportmg documentat�on can be found An mcomplete submittal package wdl result in a request for additional informaUon This wdl delay final review and approval of the pro�ect Init�al in the space provided to indicate the follownng design requirements have been met If the applicant has designated an agent the agent may ini�al below If a reqwrement has not been met, attach�ustification Pagel Plan Initials Sheet No DJB C1201 C1206 DJB DJB 1 Plans (1 50 or larger) of the entire s�te shoHnng Design at ultimate budd-out Off site drainage (if applicable) Delineated drainage basins (mclude Rational C coefficient per basin) Basin dimensions Pretreatment system High flow bypass system Maintenance access Proposed drainage easement and pubiic nght of way (ROVI� Overflow device and Boundanes of drainage easement C5103 2 Par6al plan (1 = 30 or larger) and details for the wet detenbon basin showmg Outlet stnicture �nth trash rack or simdar Maintenance access Pertnanent pool dimensions Forebay and main pond with hardened emergency spolway Basin cross sec6on Vegetafion spec�fica�on for plant�ng shelf and Fdter stnp C5103 3 Section view of the wet detention basin (1 = 20 or larger) showing Side slopes 31 or lower Pretreatment and treatment areas and Inlet and outlet structures DJB C1201 C1206 4 If the basin is used for sediment and erosion control dunng construc6on clean out of the basin is speafied , on the plans pnor to use as a wet detent�on basin DJB ' DJB ' DJB DJB ' DJB I� ' � CALS 5 A table of elevahons areas incremental volumes & accumulated volumes for overall pond and for forebay to venfy volume prov�ded C1201 C1206 6 A construchon sequence that shows how the wet deten6on basin wdl be protected from sediment unt�l the eofire drainage area is stabdized CALS CALS CALS 7 The suppor�ng calculat�ons 8 A copy of the signed and notanzed operation and maintenance (0&M) agreement 9 A copy of the deed restnc6ons (if reqwred) DJB CALS 10 A sods report that is based upon an actual field inves6gation sod bonngs and infiltra�on tests County sod maps are not an acceptable source of sods informat�on Form SW401 Wet DetenUon Basin Rev 8 9/17/09 Part III Requved Items Checklist Page 1 of 1 � � � O a I � � O a 0 0 � 0 0 �; e �; � e BMP #2 • :_ • � u i L�I ' � l.J LJ u Permit Number (to be provrded by DWQ) Dramage Area Number Wet Dete�tion Basin Operation and Maintenance Agreement I will keep a ma�ntenance record on this BMP This maintenance record will be kept u1 a log in a known set locahon Any deficient BMP elements noted in the uispechon will be corrected repa�red or replaced ixnmediately These deficxencies can affect the mtegnty of structures safety of the pubhc and the removal efficiency of the BMP The wet detenhon basin system is defined as the wet detent�on basin, pretreatment including forebays and the vegetated filter if one is provided This system (check one) ❑ does � does not Tlus system (check one) ❑ does � does not incorporate a vegetated filter at the outlet incorporate pretreatment other than a forebay ' Important maintenance procedures - Immediately after the wet detentron basin is estabhshed the plants on the ' vegetated shelf and perimeter of the basin should be watered twice weekly if needed until the plants become estabhshed (commonly six weeks) - No port�on of the wet detent�on pond should be ferhhzed after the first iruhal ' fert�hzatron that is reqwred to estabhsh the plants on the vegetated shelf - Stable groundcover should be maultauled ut the draulage area to reduce the � ' ' � C , � L. l sedunent load to the wet detentron basin - If the basu�► must be drauled for an emergency or to perform mauttenance the flus�ung of sedunent through the emergency draul should be m,n,m»ed to the maximum extent prachcal - Once a year a dam safety expert should uispect the embankment After the wet detenhon pond is estabhshed it should be inspected once a month and within 24 hours after every storm event greater than 10 inches (or 15 inches if in a Coastal County) Records of operatron and mauttenance should be kept ut a known set locatron and must be available upon request Inspechon achvitres shall be performed as follows Any problems that are found shall be repaired immediately BMP element Potential roblem How I will remediate the roblem. The enhre BMP Trash/debris Ls resent Remove the trash/debr�s The penmeter of the wet Areas of bare so�l and/or Regrade the soil �f necessary to detenhon basin erosive gullies have formed remove the gully and then plant a ground cover and water untrl rt�s establ�shed Provide lune and a one trme ferhlizer a hcahon Vegetahon �s too short or too Maintam vegetatron at a height of lon a roximatel six uiches Form SW401 Wet Detention Basm O&M Rev 4 Page 1 of 4 � , ' ' 1 � 1I ' , � ' LJ ' L� � LJ u ' L� ' Permrt Number (to be prov�ded by DWQ) Dramage Area Number BMP elemenh Potential roblem How I will remediate the roblem The inlet device pipe or The pipe �s clogged Unclog the pipe Dispose of the swale sediment off srte T'he pipe is cracked or Replace the pipe otherwise dama ed Erosion Ls occurring in the Regrade the swaie �f necessary to swale smooth it over and provide erosion control devices such as reu�forced turf mattrng or riprap to avoid future roblems with erosion The forebay Sedwnent has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem �f original design depth for possible Remove khe sediment and sedunent storage d�spose of it in a locatron where it will not cause irnpacts to streams or the BMP Erosion has occurred Provide additronal erosion protectron such as reu�forced turf mathng or riprap if needed to revent future erosion roblems Weeds are present Remove the weeds preferably by hand if pest�cide �s used v,npe it on the lants rather than s ra m The vegetated shelf Best professional practrces Prune accordmg to best professional show that pruiung Ls needed practrces to maintam optrmal plant health Plants are dead diseased or Determuie the source of the dymg problem soils hydrology d�sease etc Remedy the problem and replace plants Provide a one trme ferhlizer apphcatron to establish the ground cover if a soil test mdicates rt is necessa Weeds are present Remove the weeds preferably by hand if pestrcide �s used wipe it on the Yants rather than s ra m The mau► treatnnent area Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem �f origuial design sediment possible Remove the sediment and storage depth dispose of it in a Iocat�on where rt will not cause impacts to streams or the BMP Algal growth covers over Consult a professional to remove 50% of the area and control the al al owth Cattails phragmrtes ar other Remove the plants by wipulg them invasive plants cover 50% of with pestrcide (do not spray) the basm surface Form SW401 Wet Detention Basm O&M Rev 4 Page 2 Of 4 ' � � ' ' � , ' ' ' ' ' � , ' ' Permit Number � (to be provided by DWQ) Dramage Area Number BMP element Potenhal roblem How I will remediate the roblem The embankment Shrubs have started to grow Remove shrubs immediately on the embankment Evidence of muskrat or Use traps to remove muskrats and beaver actrvity �.s present consult a professional to remove beavers A tree has started to grow on Consult a dam safety speciahst to the embankment remove the tree An annual u�spechon by an Make all needed repa�rs appropnate professional shows that the embankment needs re a�r �f a hcable The outlet device Clogguig has occurred Clean out the outlet device D�spose of the sediment off sxte The outlet device Ls dama ed Re a�r or re lace the oudet device T'he receiving water Erosion or other signs of Contact the local NC Division of damage have occurred at the Water Quahty Regional Office or outlet the 401 Oversight Urut at 919 733 1786 The measuring device used to determine the sediment elevahon shall be such that rt will give an accurate depth reading and not readily penetrate into accumulated sediments When the permanent pool depth reads 4 5 feet in the main pond, the sediment shall be removed When the permanent pool depth reads 4 5 feet in the forebay, the sedunent shall be removed BASIN DIAGRAM Ull in ihe blanks) Permanent Pool Elevation 204 50 Sedunent Removal 200 00_________i Pe anen ---- Volume Bottom Elevat�a 198 00 R Min Sedunent Storage FOREBAY Pool Sediment Removal Elevation 200 00 Bottom Elevation l98 00 MAIN POND Form SW401 Wet Detention Bas�n O&M Rev 4 Page 3 of 4 , Volume 1 ft r. Sed�me� Storage ' I I�� I I ' � � ' � il � ' LJ L�� ' � ' L Perm�t Number (to be provrded by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the mamtenance procedures listed above I agree to notify DWQ of any problems wrth the system or prior to any changes to the system or responsible party Pro�ect name Caterpillar Office Buildm BMP drainage area number # 1 Pnnt name Joseph Wmfield Poole Trtle Pro�ect Manag,er Address 954 N C 42 East Phon� Sign� Date Note The legally responsible party should not be a homeowners assoc�at�on unless more than 50% of the lots have been sold and a res�dent of the subdrvision has been named the pres�dent I��" ,� � S a Notary Public for the State of o�-�1n (°��,��,1, �, County of �oh n��a„� do hereby cerhfy that �'��n n4. W�,r,�� .\ 1�� e personally appeared before me this 1`~i day of �C�-aio„��- �� and acknowledge the due execution of the forgoing wet detention basm maintenance requirements Wimess my hand and official seal ��`�� LIVI+�� ,�,P�sA NGS�..', : �`� NOTAqy �2% _ _ _ My Comm Expires � = �— �"�t�'��S p : � %��,LSpUBL1C'�=.` .,�� T�N COV�,,�� '��1f/11111ti��` SEAL ��.cP-SG�, � V v�c�5 � � SJo�c.r� Pl.�n� c� My commission expires �Gw 8'� . a6 � S Form SW401 Wet Detention Basm O&M Rev 4 Page 4 Of 4 � i� � 1 ' ' ' I I lu �1 � I �' CI� � � E�I S TING �� STREAM 1 S WALE AN ALYSIS � � � � � � �� t � � � � 0 � D 0 � � 0 � 0 a � � ' e � Ex�st�ng Swale - BMP #2 _ _ __ _� � � Y � -� Pro�ect Descnption _,� w_ � � __ �, �__ �, ,�� ti.. _� � ____ _ _ ...._ �. ,�.�._ __�-.- _�-- Fnction Method Manning Formula Solve For Normal Depth input Dataw ,. � _.� �.__�_ �.. .,� ._._��T.. ..�_ ' ,� _� �..__ ��..� � � .��... _ �..�.�_ _. �._ � � Roughness Coeffiaent 0 045 Channel Slope 0 06310 ft/ft Left Side Slope 3 00 ft/ft (H � Right Side Slope 3 00 ft!ft (H � Discharge 44 61 ft /s Results� � � �.� w _ _ _ _ _� _ .n. �. _� _ _ .., � _ _ _ �_ ____ � _� _ � w Normal Depth 1 50 ft Flow Area 6 75 ft2 Wetted Perimeter 9 49 ft Hydraulic Radws 0 71 ft Top Width 9 00 ft Cntical Depth 1 69 ft CnUcal Slope 0 03349 ft!ft Velocdy 6 61 ff/s Veloaty Head 0 68 ft Specific Energy 2 18 � Froude Number 1 35 Flow Type Supercntical � �..� �� _ _ __ � .. � _ i GVF Input Data � y 4 �_ , ,� _ _ ,�.� u �. _ .� _w .._._ _ Downstream Depth 1 50 ft Length 110 91 ft Number Of Steps 30 GVF Output Data �� a _ � 4 � � _ � _ � � _ y _ _ ._ �.. e �. ` v� �,_ _.,_.i �._ � .._ � w. _ _ Upstream Depth 1 69 ft Profile Descnption SZ Profile Headloss � 19 � Downstream Velocity 6 61 ft/s Upstream Velocity 5 21 fUs Normal Depth 1 50 ft Cntical Depth 1 69 ft Channel Siope 0 06310 ft/ft Cntical Slope 0 03349 ff/ft Bentley Systems Inc Haestad Methods S��sMaster V8� {SELECTsenes 1) [08110103J 1212012011 8 46 38 AM 27 Siemons Company Dnve Swte 200 W Watertown CT 06795 USA +1 203 755 1666 Page 1 of 2 � , � ' � � � ' ' � ' ' � ' e � � , � Ex�st�ng Swale - BMP #2 � ��---� :� � �� - '-� � , � � � � �`� " � > � ,. � � �� " ° �. �' � Messages � ,� �° ,� ��_,_ � � �� _ �} �.�. �. _ ��._ � K _�� _ �._.. � u _. Notes DA=12 09 1=7 38 C= 50 BenUey Systems Inc Haestad Methods S�e1�Eia�sMaster V8i (SELECTsenes 1) [0811 0103] 12/20/2071 8 46 38 AM 27 Siemons Company Drive Suite 200 W WateRown CT 06795 USA +t 2U3 7551666 Page 2 of 2 � � � ' 1 ' ' 1 ' � ' ' ' ' 1 ' ' ' ' Ex�st�ng Swale w/New DA - BMP #2 �Pro�ect Description � _ _ � w � � ~ � Fnction Method Mamm�g Formula Solve For Normal Depth Input Data _ __ _ � �. _ _ _.. �.. _ __ _ v � ... _ � _ �.. Roughness Coefficient 0 045 Channel Slope 0 03500 ft/ft Left Side Slope 3 00 ft/ft (H � Right Side Slope 3 00 ft/ft (H � Discharge 22 03 fP/s Resultsy _ �_� � _ ,, _ � _ _ � _ � _ _ .�_ Normal Depth � 29 ft Flow Area 4 96 ft Wetted Penmeter 8 13 ft Hydraulic Radws 0 61 ft Top Width 7 71 ft Cntical Depth � 27 � Cntical Slope 0 03679 ft/ft Velocity 4 44 fUs Veloaty Head 0 31 ft Speafic Energy 1 59 ft Froude Number 0 98 Flow Type Subcntical �__ � ____ � GVF Input Data _ _ _ __ , � _ _ .� _ � _ _ __ _ ._. _ �.� � _.� _ Downstream Depth � 29 � Length 110 91 ft Number Of Steps 30 GVF Output Data � _ _..M�,� � �. � _ �_ � _ � _ � � .._ _ � _ _�. _ Upstream Depth 1 29 ft Profile Descnption M1 Profile Headloss 3 88 ft Downstream Velocity 4 41 ft/s Upstream Veloaty 4 44 ft/s Normal Depth � 29 � Cntical Depth � 27 � Channel Slope 0 03500 ft/ft Cntical Slope 0 03679 ft/ft A _. � ..._ ..��.., Bentley Systems Inc Haestad Methods S�tlbYay�le6silAaster V8� (SELECTseries 1) [08 11 01 03] 12I20/2011 8 45 38 AM 27 S�emons Company Drive Suite 200 W WateRown CT 06795 USA +1 203 755-1666 Page 1 of 2 ' ' ' ' , ' ' ' 1 ' ' , ' ' 1 ' ' ' ' Ex�st�ng Swale w/New DA - BMP #2 ,-� - -� � _ � _ �- _ r� � _ Messages _ �, �,. � �, �, _ _ �. n_ � �_ � _ � � .- Notes DA=3 28 1=7 38 C=50 = Q=12 11 DA out of Pond Q10= 9 92 cfs Total Q= 12 11+g 92=22 03 Bentley Systems Inc Haestad Methods S�}�felmsMaster V8i (SELECTserles 1) [0811 07 03] 12/20/2011 8 45 38 AM 27 Siemons Company Drive Swte 200 W Wate�town C7 06795 USA +1 203 755 7666 Page 2 of 2 1 � ' � ' � � ' � � � � � � t � � � t STO D�:.AINAGE CALCU LATIONS � � M� W � � �w, W � H e � � � � � N � ^ N � O � O � N c~jcoa W � J W N � i 0 a U E `o � r d � c d m co �o � u5 � � M O N � + U� c� o u� �w _n r° o vU 0 t c N � � � V N .� N l�0 � S �j U� G N N .�.. � 7 �� ' ,,o` d T C C N p, mE 0 U c 0 E d � n N U N 7 O T N J � O � fD � � N O � N sa N � � � � _ � _ � i � � � � � � _ � � i � E � 3 y 0 oM � � � � V C 7� �^.,� � � � � /\ �:7 � V C y>>-�.. y� � Cl w �"' 3 � � .,„ O £ c� � � �� s � � � �a� � � � � N �V� � � C O N� N =� � �� J � � � � C +� `� T � r C � � � C c'3¢ `� N � � � 3 o y �o _� �� Q � �'s V � � .-. i � c � � � r � � � � �� C � N.. m ooEE � � I-- �. 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N N N N ��N N N � .r.. � C 7 7 � c c�00 rrC7J� N N2(� N c c = c 0 O M N /��;�� o c� oC C,° 0 oc � ,�h I � w O V O p �U � � o� M T �t � 0 0 � N N (u) uoqenal3 0 0 + N 0 � + � 0 0 + T � � + O � � + � � + 0 0 0 O N N C O � � N �� O O N � p� c~.�a�a J o W N > 0 U E � N � m a � � � �� o UF oV �3 y o v °= m L � � �� yN I� S�N c>+ _ � �, o E a y c �a tn � T � yU c� � o mE a� � � N � N � T m J E �� o N 0 � N N a ' ' ' � ' ' ' ' ' � ' , , ' ' ' ' ' ' /�y\ V � � ++ 3 ^ � � O i� � � N � � O P �. � � � � � � � A � � � ` � d � � � � � � � �1 p � O � � � N W xr �°o� x� o�r^� �NN�/h� M vv� N N3 � C � N � (� C �N m m O � E > (� (� � � C C = = C O�QQWW� �??�Nt� N �..��..�N N N � �^" �(V" _ � "' a' C C J O O rCC7�r >mSC7> C C = C O O O N N N Gl) uoRenal3 � � o � � c o ° � N 0 � O O N N � ,� C O O N � OI H � l0 c� a� a J u W N � i 0 U E 0 � T N m Q N � � �� c� U° c~ oV a� �; n� �� L3� �o� Nwn � 01 0 �� c > + � N � � C .�-� l0 N p, y E To yU � c a� ° m£ a� � N � N � T W J � m � N � � N � O � N N N � � ' , ' ' ' ' ' ' , , ' , , � , ' ' � v � � � � � � � � � � J � N N� O M � ��p�N N � � NMvNN++ � �M r � � C C � O i�i � N � � J � � � Q E > >�V' > e� ��cc==c r l�' r O N � � � � W C � Q L � � � � T O O O M M Oi � � � � � V � Uc�rnrnoorn Ci N N N N N N � � .-� C f+ +.+ � � r N � � � � �=�� 'C � 2 (� N d > > = c � c c _ °o L � � C N � W � � N O � O � � � � O � M r N 0 0 O � N (�) uoi�ena13 0 0 � M N O tn t O .-. � � � � � (� � 0 � + 0 N � O �o� a`� � a� iy � m U�d J y llA y � i a � `o y m a m N � � �n �� U° �U 0 '3 � o v °= m «3 � �� yN I� i � N N � c>+ c N� ET m� Na y E T � yU c � �o m� m in N � N O �+ l0 J E cp .- N � N O � N N ? � ' ' ' ' , 1 ' ' � 1 1 1 1 �� RIP �:AP OUTLET PROTECTION � i , � � ' L.J ' � ' 0 � ' ' ' ' L_1 ' ' , 0 0 o DATE 11/03/2011 DESIGNED BY �• � � DJB PROJECT NAME Caterpolar Clayton ice Bwlding 8 Shop PROJECT N HECKED BY PROJECT LOCATION Cia on NC 01517-0219 GML Storm Outlet Structure Strudure= FES 2 Q�aQtun = o �a Size= 15 in VNfull = 1 090 Qto = 4 80 Cfs V= 5 7 fps Qfull = 6 45 cfs Vfull = 5 26 fps From Fig S 06 b 1 Zone = 2 From Fig 8 06 b 2 D5o = 8 in DMnx = 12 in Riprap Class = B Apron Thickness = 22 m 3 Apron Length = 7 5 ft Apron Width = 3 x Dia = 4 0 ft � � I Storm Outlet Structure StruCture= FES 3 Qto/Qfull - 0 09 Size= 15 �n VNfull - 0 588 Q�o= 197 Cfs V= 103fps Qfuli = 21 58 cFs Vfull = 17 59 fps From Fig 8 O6 b 1 Zone = 6 From Fig 8 06 b 2 Dso = 14 m DMax = 21 in Riprap Ciass = 2 Apron Thickness 36 m Apron Length - '12 5 ft Apron Width = 3 x Dia = 4 0 ft � ' ' ' , , � ' ' , ' ' , ' , ' , � ' ' ECT LOCATION Clayton NC Storm Outlet Structure SVucture Temp 15 CPP Size- 15 in Qto= 361 cfs Qfull - 13 99 cfs Vfull = 7 92 fps From Fig 8 O6 b 1 From Fig 8 06 b 2 3 � 9 I Zone D5o DMAx Riprap Class Apron Thickness Apron Length Apron Width 3 x Dia DATE 11/03/2011 DES DJB PROJECT NO CHE 01517 0219 GML Qio/Qfull = 0 26 VNfull - 0 831 V = 6 6 fps 1 4 in 6 in A 12 in 50 ft 40 ft BY � � � ' , ' ' � ' s 1 0 1 1 1 1 �� 1 0 ANTI-FLOATATION DEVICE i 1 1 i 1 ' ' , ' ' 1 ' 1 , , ' , ' ' m � 0 } m 0 w z C� � W � � O N ti N O � W H � N O ti � � �. O U c 0 � c L O "� Z 0 Q U O J � U W � O � n. � � � .. �. � � w a c � N d � � � � � � p ONN o0�'N M � (p O � M M � op tn � I� N O � � II II II 11 II II � N N N N N N ,� U U U U U U Li Li L� LL LL L�L w }. �. O � � � N (d (C O N N N O O O V N N N � 7 � � � � � m m m N — � t�n � N fN4 O � m � � Oo F— � � � � � � � � � � M M oO � �L") 00 N � � a m u u u u u u u u n �.� L.� t r'' L L L Z � �� C � � N N = N p� N C�� c�n N fN0 ap � _ �� mm m ��N U�� U U U � , � ' ' � � , � t � � t � � � � � f TEMP O��ARY S KIMIVIER B A S IN � ' � u ' u� � , , ' ' � , 1 I u , � e D a �, a N G W � � d N 0 0 � 0 � r � � ' ' ' � , i , , , , � ' , , ' �� u � C � O N �A M e� N N N j �V% '� N d � 0 � U U v� O O .�L N � � � U 0 O M � � � d d N � � W L V � � � ' � � Y d C a% � L 0 � � � C U W � c W v 0 T l0 '� M � � N N � U Z � Z � 'O � � � � V � N N O N r W � J > �� a� a� a� a� a� a� �� M .. : � C M �+ Ri G� +' m � � Q C C � � � � � Q M C / � � d � � E � �3Es � O O �, +�a�a W 1�— m G ' � �J ' ' ' ' LJ � � � 1 i 1 1 C� 1 1 ! 1 FAIRCLOTH SK:IMMER S IZING GUIDELINE S � � � i L� ' ' Determining the Skimmer Size and the Required Orifice for the l��ir�l��l� �I�i��r� Surface Drain November 2007 Important note The onfice s►zmQ chart �n fhe Pennsylvan�a Erosion Confrol Manual and r�eproduced m the North Carol�na Des►gn Manual DOES NOT APPLY to our sk►mmers It wdl g�ve the wrong s►ze onfice and not spec�fy which s►ze sk�mmer is ►nequu�ed Please use the ►nformaf�on below to choose the s�ze skimmer required for the bas►n vo/ume rop vided and determine the onfrce s�ze reqwred for the drawdown time typ�cally 4-7 days in Pennsylvania and 3 days �n North Carolina The s�ze of a Faircloth Skimmer� for example a 4 skimmer refers to the maximum diameter of ' the skimmer inlet The inlet on each of the 8 sizes offered can be reduced to ad�ust the flow rate by cuttmg a hole or orifice in a plug usmg an ad�ustable cutter (both supplied) ' Determirnng the skimmer size needed and the orifice for that skimmer required to drain the sediment basm s volume in the required time involves two steps F�rst determining the size skimmer required based on the volume to be drained and the number of days to drain it and Second, calculate the orifice size to ad�ust the flow rate and customize the skimmer for the fbasin s volume The second step �s not always necessary if the flow rate for the skimmer with the mlet wide open equals or is close to the flow rate required for the basin volume and the drawdown time ' , � , � ' , , ' Both the skimmer size and the required orifice radius for the skimmer should be shown for each basin on the erosion and sediment control plan Make it clear that the dimension is either the radius or the diameter It is also helpful to give the basin volume m case there are questions Durmg the skimmer mstallation the required orifice can be cut in the plastic plug using the supplied ad�ustable cutter and installed in the skimmer using the instructions provided The plan review and enforcement authority may reqwre the calculations showing that the skimmer used can drain the basin in the required time Determ�ning the Skimmer Size Step 1 Below are approximate skimmer maximum flow capacities based on typical draw down reqwrements which can vary between States and �urisdictions and watersheds If one 6 skimmer does not provide enough capacity multiple skimmers can be used to dram the basm For drawdown times not shown multiply the 24 hour figure by the number of days required Example A basin s volume is 29 600 cubic feet and it must be drained m 3 days A 3 skimmer with the inlet wide open will work pertectly (Actually the cha�t below gives 29 322 cubic feet but this is well withm the accuracy of the calculations and the basin s constructed volume ) Example A basin s volume is 39 000 cubic feet and it must be drained m 3 days The 3 skimmer is too small a 4 skimmer has enough capacity but it �s too large so the inlet wdl need November 6 2007 , ' i � ' ' � , ' � ' , ' ' ' ' ' � '� I ' to be reduced using step 2 to ad�ust the flow rate for the basin s volume (It needs a 3 2 diameter orifice ) 1'/:" skimmer with a 1'/z head 2" skimmer with a 2 head 2'/:" skimmer with a 2 5 head Revised 11 6 07 3" skimmer with a 3 head 4" skimmer with a 4 head Revised 11 6 07 5" skimmer with a 4 head 6" skimmer with a 5 head 8" skimmer with a 6 head CUSTOM MADE BY ORDER 1 728 cubic feet in 24 hours 3 456 cubic feet in 2 days 5 184 cubic feet m 3 days 3 283 cubic feet in 24 hours 6 566 cubic feet in 2 days 9 849 cubic feet in 3 days 6 234 cubic feet in 24 hours 12 468 cubic feet in 2 days 18 702 cubic feet in 3 days 9 774 cubic feet m 24 hours 19 547 cubic feet in 2 days 29 322 cubic feet in 3 days 20 109 cubic feet m 24 hours 40 218 cubic feet in 2 days 60 327 cubic feet m 3 days 32 832 cubic feet in 24 hours 65 664 cubic feet in 2 days 98 496 cubic feet in 3 days 51 840 103 680 155 520 97 978 195 956 293 934 CALL! cubic feet in 24 hours cubic feet m 2 days cubic feet in 3 days cubic feet m 24 hours cubic feet m 2 days cubic feet m 3 days Determining the Orifice 6 912 cubic feet in 4 days 12 096 cubic feet in 7 days 13 132 cubic feet in 4 days 22 982 cubic feet in 7 days 24 936 cubic feet in 4 days 43 638 cubic feet m 7 days 39 096 cubic feet in 4 days 68 415 cubic feet in 7 days 80 436 cubic feet in 4 days 140 763 cubic feet m 7 days 131 328 cubic feet m 4 days 229 824 cubic feet in 7 days 207 360 cubic feet in 4 days 362 880 cubic feet in 7 days 391 912 cubic feet in 4 days 685 846 cubic feet in 7 days Step 2 To determ�ne the orifice required to reduce the flow rate for the basm s volume and the number of days to drain the basm simply use the formula volume - factor (from the chart below) for the same size skimmer chosen m the first step and the same number of days This calculation will give the area of the required orifice Then calculate the orifice radius using Area = n r� and solvmg for r r= (Area/3 14) The supplied cutter can be adJusted to this radius to cut the onfice in the plug The mstructions with the plug and cutter has a ruler divided into tenths of inches Agam this step is not always necessary as explained above An alternative method is to use the orifice equation with the head for a particular skimmer shown on the previous page and determine the orifice needed to give the required flow for the volume and draw down time C= 0 59 is used in this chart Example A 4 skimmer is the smallest skimmer that will dram 39 000 cubic feet m 3 days but a 4 inlet will dram the basin too fast (m 1 9 days) To determine the onfice required use the factor of 4 803 from the chart below for a 4 skimmer and a drawdown time of 3 days 39 000 cubic November 6 2007 2 � ' f � � � ' ' , � ' � � ' � � � ' feet = 4 803 = 812 square inches of orifice required Calculate the onfice radius using Area =� � and solvmg for r r= (8 12/3 14) and r= 1 61 As a practicai matter 1 6 is about as close as the cutter can be ad�usted and the orifice cut Factors (in cubic feet of flow per square inch of opernng through a round onfice with the head for that skimmer and for the drawdown times shown) for determming the orifice radius for a basin s volume to be dramed This qwck method works because the orifice is centered and has a constant head (gwen above in Step 1) 1'/:" skimmer 960 to drain in 24 hours 1 920 to drain in 2 days 2 880 to dr�in in 3 days 2" skimmer 1 123 to dram in 24 hours 2 246 to drain in 2 days 3 369 to drain in 3 days 2'/:" skimmer Revised 11 6 07 1 270 to drain in 24 hours 2 540 to drain in 2 days 3 810 to drain m 3 days 3" skimmer 1 382 to drain m 24 hours 2 765 to drain m 2 days 4 146 to drain m 3 days 4" skimmer Revised 11 6 07 1 601 to dram m 24 hours 3 202 to drain in 2 days 4 803 to drain in 3 days 5" skimmer 1 642 to drain in 24 hours 3 283 to drain in 2 days 4 926 to dram m 3 days 6" skimmer 1 814 to dram m 24 hours 3 628 to drain in 2 days 5 442 to drain m 3 days 8" skimmer 1 987 to dram in 24 hours 3 974 to drain in 2 days 5 961 to drain in 3 days 3 840 to drain m 4 days 6 720 to drain m 7 days 4 492 to drain in 4 days 7 861 to drain in 7 days 5 080 to drain m 4 days 8 890 to dram in 7 days 5 528 to drain in 4 days 9 677 to drain in 7 days 6 404 to drain m 4 days 11 207 to drain in 7 days 6 568 to drain in 4 days 11 491 to drain m 7 days 7 256 to dram m 4 days 12 701 to drain in 7 days 7 948 to dram m 4 days 13 909 to drain in 7 days J W Faircloth � Son, Inc Post Office Box 757 412-A Buttonwood Drive Hillsborough, North Carolina 27278 Telephone (919) 732 1244 FAX (919) 732 1266 FairclothSkimmer com �wfaircloth@embarqmail com Onfice s¢ing Revised 2 2-01 3 3-05 2 1 07 11 6-07 ' November 6 2007 3 ' , ' , ' J ' 1 ' Ca � � � C 1 1 � �� 1 1 S �V�TALE CALCULATIDN S UMMARY C � � 11 t� H N � H C O � cfl U Q O Z v M � 01 M N O I� O O II � Cl v�f O � p f�0 � � � a o0 3 � U U U U Q � ONO i-�-I eN-1 N� M N t0 0 v M O O O� O M O� I� � `� 0 � +�+ � � r-I M M � �-i � � � �n � O O et � � �t0 O O O O O�O I� O O O O O tA M O O O O O a�-� N �V tli � 0 � 0 � Lti O � � � 0 � � � 0 3 N00000•-�+ 0 0 01 d. � w � C1 � � �-i ,a, � y M M 01 O 1� N M .� tD 01 M M M rl 1� .� O O O N�--I N 1`Np �� M i-�-I eN-I p1 � O Vr O O O O O O.-� 01 t�l� M � � 00 �-Ni v�i V�1 f� N� O o0 e-I N e-I � � � e�-1 � y O 00 O O O O O � O� O O O O O O crl O O O O O �+ C � O u1 O O O O O E� O tt O O O O O � O O O O O O O 10 a M �D Q M N ^ 01 a--1 � O O O O O O N � O O O O N O 01 0 0 � d � O O O O o0 O u1 �� O O O O N O N 0 0 0 0 0 0� ` d a � � � � O M N � r-I 1!'1 � W � ei N M�' tn lp I� 3 N �o +� 0 � � C O a � 0 LL N d' O Ct II II W � U U rl N � � G1 N 3 3 N Vf � + M + � N N QJ H H > > �-1 N N � f0 f0 1�/1 N � � y O O� 0 O N O vf 01 ri N � M 111 �--� N � O N L O e-1 rl H 01 lG i--I M M N �' N M M U N O c � j C �J O�C p N e�-1 M � � � o 0 0 �° � E °�, � o � 3 Z H LL � tJ ++ C � C v 3 � 3 �� e-1 N M� Il) l0 I� N U f0 C vf a.�+ N C a � � C N C � Y �- � o 0 � c c. 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I� 00 M M O N V M N N O C � ;v L � � fC � Ql ^ I� l"� � 3 � O � O � C � O tC LL Z rl N M'� 111 l0 I� � _ � _ � _ � _ _ _ _ _ _ _ _ � _ _ � 1 ' ' � ' ' ' 1 1 � � t � � � � i 1 1 TEl�/IPO�:ARY DIVERSION L_.: ' ' ' ' ' ' ' ' ' , , ' ' , ' ' ' ' Temp Diversion A Project Oescription Fnc�on Method Manning Formula Solve For Normal Depth Input Oata Roughness Coefficrent 0 033 Channel Slope 0 07395 ft/ft Leit Side Siope 3 00 ft/ft (H 1n Right Side Slope 3 00 ft!ft (H � Discharge 411 R'/s Resutts Normal Depth 0 53 ft Flow Area � � � Wetted Penmeter 3 35 ft Hydraulic Radius 0 25 ft Top Width 318 ft Crdical Qepth 0 65 ft Cnbcal Slope 0 02475 ft/ft Velocily 4 88 fNs Velocity Head 0 37 ft Specdic Energy 0 90 ft Froude Number � 67 Flow Type Supercntical GVF input Data Downstream Depth 0 00 ft Length 0 00 ft 1Vumber Of Steps 0 GVF Output Data Upstream Depth 0 00 ft P�le Descnptron Pr'ofile Headbss � � � Dovmstream Veloaty Inflmty ft/s Upstream Velocity Infinity ft/s Nortnal Depth 0 53 ft Cdtical 0epth 0 65 ft Channet Slope 0 07395 ftHt CMical Slope 0 02475 ft/it BeMley Systems Inc Haeatad MetNods SoUR�f[�iRewM�te► V81 ISELECTserles 1) (OB 1101A9] 10I27IZ0718 27 S6 AM 27 81emo� Compeny Driva Sulte 200 W Waie�town CT 06788 USA +1-203-tS5-1666 Page 1 of 1 L_J ' ' ' � �J ' ' ' ' ' ' ' ' ' ' ' ' ' Temp Drversion B __ Project Description Fnctio� Method Manning Fortnula Solve For Normal Depth Input Data Roughness Coefficier�t 0 069 Channel Slope 0 04755 ft/ft Leit Side Slope 3 00 ft!ft (H 1� Right Side Slope 3 00 ft1R (H 1n Discharge 9 83 ft'/s Rest�lts Normal Depth 1 05 ft Flow A�ea 3 33 it2 Wetted Penmeter 6 66 � Hydraulic Radws 0 50 R Top Width 6 32 R Critical Depth 0 92 ft Cnticel Slope 0 09633 ftHt Veloc�ty 2 � �$ Veloc�ty Head Q 14 � Specific Energy � � 9 � Froude Number � 72 Flow Type Subcr�cai GVF Input Data Downstream Depth 0 00 ft ��9� 0 00 ft Number Of Steps � GVF Output Data Upstream Depth 0 � � Profile Descript�on Profile Headloss 0 00 R Downstream Velocdy Infimty !t/s Upstream Velocdy Infinit�r R/s Normal Depth 1 05 ft Crdical Depth 0 92 ft Channel Slope 0 04755 TUR Cr�cel Slope 0 09633 ftHt Bentley 8ystems inc Haested MetAods SoI�IFterrMaater VSi (SELECTseries 1) [0811 01.033 10t27P2D118 27 6S AM 27 Slemons Company DAVe Suite 20o W WateKOwn CT 06785 USA +7 203-755-1666 Page 1 of 1 ' ' Temp D�version C Pro�ect Descnption ' Fridion Method Manrnng Formula Solve For Normal Depth ' Input Data Roughness CoeffiaeM � p� ' Channel Slope 012250 ft/R Left Sule Slope 3 00 ft/R (H � Right Side Slope 3 00 ft/ft (H V) ' Discharge 141 ft'/s Resuits ' Normal Deptt� a 32 ft Flow Area 0 31 ft� Wetted Perimeter Z � ft ' Hydraultc Rad�us 015 ft Top Width � � � Cr�ical Depth 0 42 ft ' CMical Slope 0 02855 ft/ft Velocdy 4 51 R/s Veloaty Head 0 32 ft ' Specifiic Energy 0 64 ft Froude Number � � ' Flow Type Supercxihcal C3VF tnput Data , Downatream bepth 0 00 ft ��9� 0 00 ft Number Of Steps � ' GVF Output Data Upstream Depth Q � ft ' Profile Descript�on Profile Headloss � � � Downstream Velocity Infirnty ft/s ' Upstr+eam Veloc+ty �r�inity it/s Normal Depth 0 32 ft Cr�cal Depth 0 42 ft ' Channel Slope 012250 R/ft C�itical Slope 0 02855 ft/ft ' Be�ley Sysbems Inc. Fla�tad aNethods Sol�FtewMaster H81(SELECTseries 1) [08110105] 1Q/27/20118 28 OB ANI 27 Slemons Compa�ry Drfve Sulte 200 W WaterEown CT 06798 USA +1-Z09-765-16B6 Page 1 of 1 ' ' ' L' ' ' ' , ' ' ' � ' � ' LJ ' ' � 1 ul - Temp Diversion D Pro�ect Descr�pt�on Fndion Me�od Manning Fortnula Solve For Normal Depth tnput pata Roughness Coefficient 0 033 Channel Slope 010380 ftHt Left Side Slope 3 00 ft/R (H V} Right Side Stope 3 00 ftHt (H V) Discharge 115 ft°Is Results Normal Depth 0 31 ft Flow Area � 29 � Wetted Perimeter 1 95 ft Hydraulic Radws 015 ti 7op Width 1 85 ft Cntical Depth 0 � � CnGcal Slope 0 02933 ff/ft Velocdy 4 03 ft/s Velocit�r Head 0 25 ft Speciflc Energy 0 56 ft Froude Number � 81 Flow Type Supercr�Gcal �VF input Data Downstream Depth 0 00 ft ��g� 0 00 ft Number Of Steps a GVF Output Data Upstream �pth 0 00 ft Profile Descnpt�on Proflle Headloss 0 00 R Downstream Velocdy Ir�findy ff/s Upstream Veloaty Ir►findy ft/s Normal Depth 0 31 ft Crdlcal Depth 0 39 ft Channel Sbpe 010380 ft/ft Crdical Slope 0 02933 ft/ft Ba�ey Systerr� Inc. Haestad Methods So18�nd�RtewMasterY81(S�ECTserfes 1) (�OB 11A1.03] 10/2711011 8 28 17 AM 27 8lemons Compaiqt Drive Suka Z00 W Watertown CT 08786 USA +1 203-7b61666 Page 1 of 1 ' u ' � I� ' � , , �[NSTON CNTY JO � PRE IPITATION C ' E Y DATA FRE U NC ' � � �� 1 �� i � ' , ' L__l � ' � ' ' 1 ' � l _J ' ' ' � l�J PF tabular PDS based noint NOAA Atlas 14 Volume 2 Version 3CLAYTON 3 W Station ID 31 7820 �Location name Clayton North Carolina US � m �� Coordinates 35 6408 78 4633 �� Elevation Elevation (station metadata) 300ft souroe Google Maps POINT PRECIPITATION FREQUENCY ESTIMATES G M Bo�nm D Martm B Lm T Parzybok M Yekta and D Rdey NOAA NaUonal Weather Sernce Sdver Spnng Maryland PF tabular � PF qraqhical � Maps & aenals estimates with 90% confidence intervals e recurrence interval(years) ��JL�� 10 25 50 100 200 500 1000 5 min 0 412 0 480 0 548 0 615 0 684 0 739 0 788 0 832 0 882 0 927 �o sn o as2> �o aao o szs� �o soz o sss� (o ss2 o s�2� �o szz o �as� �o sss o eos) (o �os o ass� �o �as o so�> (o �ea o sss> �o e�� o�� 10 mm 0 658 0 767 0 878 0 984 1 09 1 18 1 25 7 32 1 40 1 46 (0 603 0 722) (0 703 0 840) (0 804 0 960) (0 899 1 08) (0 991 1 19) (1 07 1 28) (1 13 1 36) (1 18 1 44) (1 24 1 52) (1 29 1 60) 15 mm 0 823 0 965 1 11 7 25 7 38 1 49 � 1 58 1 66 1 76 1 83 ) (0 753 0 902) (0 884 1 06) (1 02 1 21) (1 14 1 36) (1 26 1 51) (1 35 1 62 (1 42 1 72) (1 49 1 82) (1 56 1 92) (1 61 2 00 30 min ��3 1 33 7 58 1 80 2 05 2 24 2 42 2 59 , 2 79 2 97 (1 03 1 24) (1 22 1 46) (1 45 1 73) (1 65 1 97) (1 S6 2 23) (2 03 2 45) (2 18 2 64) (2 32 2 83 (2 48 3 OS) (2 61 3 24) 60 min � 41 1 67 2 02 2 35 2 72 3 04 3 34 3 63 4 07 4 33 , (1 29 1 54) (1 53 1 83) (1 85 2 21) (2 15 2 57) (2 48 2 97) (2 75 3 32) (3 01 3 64) (3 25 3 96) (3 56 4 38) (3 82 4 74 2 hr � 65 1 97 2 42 2 84 3 35 3 80 4 23 4 68 5 27 5 80 (1 50 1 83) (1 79 2 17) (2 19 2 66) (2 57 3 13) (3 02 3 68) (3 40 4 17) (3 77 4 65) (4 14 5 14) (4 62 5 79) (5 04 6 38) 3 hr � �5 2 09 2 57 3 04 3 63 415 4 67 5 23 ) 5 98 ) 6 66 � (1 59 1 94) (1 90 2 31) (2 34 2 84) (2 76 3 36) (3 27 4 00) (3 72 4 57) (4 15 5 14) (4 61 5 75 (5 21 6 58 (5 74 7 34 6 hr 2 09 2 50 3 08 3 65 4 37 5 02 5 67 6 37 7 33 8 20 (1 92 2 31) (2 29 2 76) (2 81 3 39) (3 32 4 01) (3 95 4 79) (4 50 5 50) (5 OS 6 21) (5 61 6 96) (6 37 8 00) (7 04 8 98) 12hr 247 294 364 434 523 604 687 777 903 102 (2 25 2 72) (2 69 3 24) (3 32 4 01) (3 94 4 77) (4 71 5 73) (5 40 6 60) (6 09 7 51) (6 81 S 48) (7 78 9 85) (8 65 11 1) 24 hr 2 89 � 3� � �a os4a 92 5 24 6 32 ) ( 7 19 8 11 ) 9 08 10 4 71 6 � (2 63 3 1S (3 19 3 86 ) (4 76 5 77) (5 71 6 95 6 48 7 92) (7 27 8 92 (8 11 9 99) (9 26 11 5) (10 2 12 8 �335 404 511 597 776 812 913 102 117 129 Z-da (3 O6 3 67) (3 70 4 44) (4 66 5 61) (5 44 6 56) (6 50 7 86) (7 34 8 92) (8 22 10 0) (9 12 11 2) (10 4 12 9) (11 4 14 3) 3�lay �3 653 87) (3 3 4 67) (4 335 87) (5 326 83) (6 248 16) (7 949 24j (8 84 0 4) (9 50 1G1 6) (10 8 13 2) (11 S 14 6) 4-day � 376 452 ) �52 66�3 655 780 881 985 109 125 137 3 47 4 08) (4 17 4 91 ) (6 02 7 10) (7 14 8 46) (8 03 9 56) (8 94 10 7) (9 88 11 9) (11 2 13 6) (12 2 15 0) �436 523 646 743 877 985 110 121 137 150 ��ay (4 04 4 70) (4 84 5 64) (5 97 6 97) (6 85 8 01) (S 07 9 47) (9 02 10 6) (10 0 11 8) (11 0 13 1) (12 4 14 9) (13 4 16 3) 10ilay 4 99 5 95 7 24 8 24 8 60 10 7 11 8 12 9 14 4 15 6 (4 64 5 35) (5 54 6 38) (6 73 7 77) (7 65 8 83) (8 89 70 3) (9 86 11 5) (10 8 12 6) (11 8 13 9) (13 1 15 5) (14 2 16 9) 20�day 668 782 949 ) ( 107 > 124 > ( 137 150 163 187 195 (6 25 7 16) (7 41 8 49) (8 86 10 2 9 98 11 5 (11 5 13 2 12 7 14 6) (13 8 16 0) (15 0 17 5) (16 6 19 5) (17 8 21 0) 30-day 832 982 715 129 > 146 160 , ( 173 187 205 219 , (778 890) (919 105) (108 124) (120 138 (136 157) (148 171 161 185) (173 200) (189 220) (200 235 45-day �06 124 144 159 178 193 208 222 241 255 (9 98 11 2) (71 7 13 2) (13 6 15 3) (14 9 16 9) (16 7 19 0) (18 1 20 5) (19 4 22 1) (20 7 23 6) (22 4 25 7) (23 7 27 3) 60-day � 2 � 14 9 171 18 7 20 8 22 4 24 0 25 5 27 5 29 0 (12 0 13 4) (14 0 15 7) (16 0 18 1) (17 6 19 8) (19 5 22 1) (21 0 23 8) (22 4 25 5) (23 8 27 1) (25 6 29 3) (26 9 30 9) PreGpitation frequency (PF) estimates in this table are based on frequency analysis of partial duration senes (PDS) Numbers m pareMhesis are PF estimates at lower and upper bounds of the 90 / confidence interval The probabdity that preapdation frequency estimates (for a groen duradon and average recurrence mterval) wdl be greater than the upper bound (or less than the lower bound) is 5/ EsUmates at upper bounds are not checked against probable maximum precipdation (PMP) esGmates and may be higher than currenUy valid PMP values Please refer to NOAA Atlas 14 document for more mformation Back to Toq PF graphical 30 25 c L 2O a N '� Q 15 � � � a v 10 w � a �� PDS-based depth-duration-frequency (DDF) curves Coordinates 35.b408, -78.4fi33 U � C C C C ti. �• � �. �• a T 7� T?� 7, A y, 5. ,L L .0 L .0 t0 �0 +0 +G f0 t0 �0 f0 �0 .� ,� � � � N ff�i tb � N N � � � O � O � a "' ° .u�-i m° �°n .� Ri m v � Duration 30 25 c s zo 1.✓ n. w � 0 15 .� � � c V lO w a`. �y � 2 5 10 25 50 100 Z00 500 1000 Average recurrencQ interval (years} NOAPJNWSJOHDEHDSC Created {GMT): Thu Sep 24 19:45:46 2011 Back to Too Maps � aera�� ,,, �`� Small scale �,y � � ^ � � o � ` , :. � � � . .., � , , _ '' fi�,rke a W�� '°'" . 4- M "¢' �, Har'�50nk�-�rg vv�odur,d0� c yJiryini� ,. ��Iat,orza� F ,. ;t � �� . ._ ' � al,-.=:fy �- rf 7-<'e.•. 'harteStOn � .,. '� �" . � � � �erl � . LG�1 ' Stsun'C:� �1 � . � . char6liES"vli�B w. �, � � a � u, �r`s � � � � "� �.r:,.�.ra � �.. .;Jn "GkGCrU . Gli dd%!h � He^"ersnn :.,t�o>kie . . . t. � �7 � t� � � So4'^e . . � i:�t4rtl � 5tia-B5 �If ° �e eerlsbaro ' a�uc°� " �n �;;n nr r i�`��StCf 381 l Q F'ncky f�t . �J {.�_. � -lic '•ai�t � apel H:i!O RalPigh 4 � r;mr,:�= - � =�1'th 4 , �.�c _ ��a•�c-,, s . �4'y'O ;:t 1"s'or . r�. ,�,il.,n ..na. _!_ ,n.�" GfBef�viile Average recanente mtervei (years; — 1 � . 2 — 5 — 10 -- 25 — b0 — 100 — 200 — 500 — tU00 Dur�ion _e.� � — a-aay ---• 10-min — 3-dey - 15-m� — 4-4ay — 30-min — 7-day — 60-mm — 10-de — 2-tu — 20-da — 3fir — 30-da � {�11� � �L�l� — 12-fir — 6CMe --- 24-hf ' ' , , .,�, A,,, .. —�— .. 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' � � I� �_ ' � 7 � � i � ;� �� -� �1 i ' ' ' ' ' ' ' ' ' J � I ATIoNs SPECIF C � � � � � � 1 1 �� ' � 1J � , , ll ' C � � ' 1 , ' ' � ' ' SECTION 02230 — SITE CLEARING PART 1 — GENERAL 11 SUMMARY A Section Includes 1 Protecting existing vegetation to remain 2 Removing existing vegetation 3 Clearing and grubbing 4 Stnpping and stockpiling topsod 5 Removing above and below grade site improvements 6 Disconnecting cappmg or seahng s�te util�t�es 7 Temporary erosion and sedimentation control measures 1 2 MATERIAL OWNERSHIP A Except for stripped topsoil and other matenals indicated to be stockpiled or otherwise remain Owner s property cleared materials shall become Contractor s property and shall be removed from Pro�ect site 1 3 PROJECT CONDITIONS A Traffic Mmimize interFerence with adJoinmg roads streets walks and other ad�acent occupied or used facilities during site clearing operations 1 Do not ciose or obstruct streets walks or other ad�acent occupied or used facilities without permission from Owner and authorities having �urisdiction 2 Provide alternate routes around closed or obstructed trafFc ways if required by Owner or authorities having �urisdiction B Salvabie Improvements Carefully remove items indicated to be saivaged and store on Owner s premises at a location approved by the Owner C Utdity Locator Service Notify utdity locator service for area where ProJect is located before site clearing D Do not commence site clearing operations until temporary erosion- and sedimentation control measures are in place E The following practices are prohibited within protection zones 1 Storage of construction matenals debris or excavated materiai 01517 0219 / Cat Office Bwlding 02230 1 SITE CLEARING Caterpolar Inc b October 27 2011 ISITE CLEARING ' ' ' 2 3 4 5 Parking vehicles or equipment Foot traffic Erection of sheds or structures Impoundment of water 6 Excavation or other digging unless otherwise mdicated , 7 Attachment of signs to or wrapping materials around trees or plants unless otherw�se mdicated , PART 2 — PRODUCTS ' � � , � ' ' 21 MATERIALS A Satisfactory Sod Material Requirements for satisfactory sod matenal shall be specified by geotechnical engineer 1 Obtain approved borrow sod material off site when satisfactory sod matenal is not avaiiabie on site PART 3 — EXECUTION 31 PREPARATION ' 32 ' � , ' , A Protect and mamtain benchmarks and survey control points from disturbance during construction B Locate and clearly identify trees shrubs and other vegetation to remain or to be relocated C Protect existing site improvements to remain from damage during construction 1 Restore damaged improvements to their original condition as acceptable to Owner TEMPORARY EROSION AND SEDIMENTATION CONTROL A Provide temporary erosion- and sedimentation control measures to prevent sod erosion and discharge of sod beanng water runoff or airborne dust to ad�acent properties and walkways according to erosion and sedimentation control Drawings and requ�rements of authorit�es hav�ng �urisdiction B Venfy that flows of water redirected from construction areas or generated by construction activity do not enter or cross protection zones C inspect maintain and repair erosion and sedimentation control measures during construction untd permanent vegetation has been established 01517 0219 / Cat Office Budding 02230 2 SITE CLEARING Caterpolar Inc October 27 2011 ' SITE CLEARING � ' ' 1 ' ' , , � , , ' ' ' ' ' ' ' D Remove erosion and sedimentation controls and restore and stabdize areas disturbed during removal 3 3 TREE AND PLANT PROTECTION A Repair or replace trees shrubs and other vegetation indicated to remain or be relocated that are damaged by construction operations m a manner approved by Engineer B Any vegetation designated to remain which is damaged by construction work shall be replaced with new vegetation of the same kind by the contractor responsible for such damage 3 4 EXISTING UTILITIES A Locate identify disconnect and seal or cap utilities indicated to be removed or abandoned in place 1 Arrange with utdity comparnes to shut off indicated utdities B Interrupting Existmg Util�ties Do not mterrupt utilities serving facilities occupied by Owner or others unless permitted under the following conditions and then only after arranging to provide temporary utility services according to requirements indicated 1 2 Notify Engineer not less than finro days in advance of proposed utdity mterrupt�ons Do not proceed with utility interruptions without Engineer s written permission C Removal of underground utdities is included in Dwision 2 Sections 3 5 CLEARING AND GRUBBING A Remove obstructions trees shrubs and other vegetation to permit �nstallation of new construction 1 2 3 4 Remove stumps in their entirety Remove roots obstructions and debris to a depth of 18 inches below exposed subgrade Loose sticks roots branches or other debris shall not be left on the site The Contractor shall avoid the admixture of foreign matter to the topsoil If applicable remove downed timber and associated limbs Use only hand methods for grubbmg within protection zones B Fdi depressions caused by ciearmg and grubbing operations with satisfactory soil matenal unless further excavation or earthwork is indicated 01517 0219 / Cat Office Budding 02230 3 SITE CLEARING Caterpillar Inc October 27 2011 ' ' ' , ' � , � , ' ' , , ' � � ' ' ' K�� 37 38 SITE CLEARING Place fill material in horizontal layers not exceeding a loose depth of 8 inches and compact each layer to a density equal to ad�acent original ground TOPSOIL STRIPPING A If applicable remove sod and grass before stripping topsod B Strip topsoil in its entirety regardless of depth in a manner to prevent intermingling with underlying subsoil or other waste materials It should be noted that the Contractor shall not rely on the estimated depth of topsod as indicated in the subsurface exploration repo�t for the depth to be stripped but shall be required to strip the topsoil to whatever depth encountered as part of the Base Bid without consideration of additional costs C Topsoil shall be generally defined as sods with more than 3% organics The Owner s ITL shall be the sole �udge of whether or not the material to be stnpped is considered to be topsod regardless of the general defirntion above D Stockpile topsoil away from edge of excavations without intermixing with subsoil Grade and shape stockpdes to drain surFace water Cover to prevent windblown dust and erosion by water Topsoil stockpiles shall be located as to prevent interference with any phase of the work Should the location of the topsod stockpile (Temporary or Permanent) as shown on the drawings interfere with any phase of the work Contractor shall notify Engineer of an alternate location for the placement of this stockpile Contractor shall not be entitled to additional cost to relocate stockpite at any time throughout the pro�ect These costs shall be included m the Base Bid E Stockpdes shall be smaothly and naturally shaped with no slopes exceeding 4 1 Top shall be crowned to ensure positive drainage SITE IMPROVEMENTS A Remove existing above and below grade improvements as indicated and necessary to facditate new construction DISPOSAL OF SURPLUS AND WASTE MATERIALS A Owner shall have the option of allowing the Contractor to dispose of surplus sod material and unsuitable topsoil on site in an area approved by the Owner at no additional cost to the Owner These areas shall be seeded in requirements with the Division Two speafications If reqwred additional sedimentation and erosion control devices may have to be installed in these areas at no cost to the Owner Otherw�se this matenal shall be d�sposed off s�te �n accordance with the requirements of the Authorities Having Junsdiction B Obstructions demolished materials and waste materials including trash and debris sha{I be iegaliy disposed off site 01517 0219 / Cat Office Buddmg 02230 4 SITE CLEARING Caterpolar Inc October 27 2011 , SITE CLEARING , C Separate recyclable matenals produced during site cleanng from other nonrecyclable matenals Store or stockpile without mtermixing with other ' matenals and transport them to recycling facilities Do not interfere with other Pro�ect work , D Burning of materials is prohibited END OF SECTION 02230 � � ' , ' ' � ' L� i 1 1 i 1 01517 0219 / Cat Office Budding 02230 5 SITE CLEARING ' Caterpolar Inc October 27 2011 ' , � SECTION 02250 — EROSION AND SEDIMENTATION CONTROLS PART 1 — GENERAL ' 11 ' , � ' ' ' � SUMMARY A This Section includes the following Sod Erosion and sedimentation control for all areas of the site that are graded or disturbed by any construction operations and elsewhere as indicated on the Drawings o� specified here�n Eros�on control shali be as specified herein and as may be required by actual conditions and governing authonties B The Contractor is fully responsible for all applicable permits and approvals for off site borrow and waste areas C The Contractor shall have full responsibility for the construction and maintenance of erosion control and sedimentation control facdities as shown on the Drawmgs and as specified herein The Contractor shall at all times provide the operation and maintenance necessary to operate the permitted sediment and erosion controls at optimum efficiency D The Contractor shall provide permanent or temporary ground cover as soon as possible over disturbed areas of the site and shall provide permanent or temporary ground cover in no more than 30 days after construction activities have permanently or temporardy ceased over the disturbed area Temporary or permanent ground cover shall be provided on slopes within 15 days after construction activities have permanently or temporardy ceased 1 2 PRODUCT HANDLING ' A Deliver seed fertdizer and other packaged material in unopened onginal packages with labels legibie and intact Seed packages shall bear a guaranteed analysis by a recognized authority , B On site storage of materiats shall be kept to a mirnmum Wet or damaged seed or other material shall be removed from the pro�ect immediately ' 1 3 MONITORING AND RECORD KEEPING A AI{ sediment and erosion control devices and facilities shall be inspected at least once , every seven (7) calendar days or within 24 hours after any storm event of greater than 0 5 inches of rain per 24 hour period � ' , ' B Stormwater discharges shall be inspected by observation for stormwater discharge charactenstics (as listed below) at the above frequency to evaluate the effectiveness of the sediment control facilities devices or practices Observations shall be made at all stormwater discharge outfalls and other locat�ons were concentrated stormwater discharges from the site Observations shall be qualitative no analytical testing or sampling is required if any visible off site sedimentation is leaving the site corrective action shall be taken to reduce the discharge of sediments 01517 0219 / Cat Office Budding 02250 1 Erosion and Sedimentation Controls Caterpolar Inc October 27 2011 � ' ' � 1 , � � EROSION AND SEDIMENTATION CONTROLS 1 Color 2 Odor 3 Clarity 4 Floating solids 5 Suspended solids 6 Foam 7 Od sheen 8 Other obvious indicators of stormwater pollution C The contractor shall perform and keep records of the above inspections Visible sedimentation found off the site shall be recorded with an explanation of the measures taken to prevent future release as well as any measures taken to clean up the sediment that has left the site This record shall be made avadable to the Owner Designer and governmental author�t�es PART 2 — PRODUCTS ' 21 A r22 SOIL AMMENDMENTS AND SEED Refer to Construction Drawings MISCELLANEOUS ' A Gravel for stone filters Washed No 57 stone or as indicated on the drawings B Sdt Fabric A synthetic filter fabric or a previous sheet of polypropylene nylon ' polyester or polyethylene yarn which is certified by the manufacturer or supplier as conforming to the followmg requirements � C� 1 Filtermg efficiency 85% min 2 Tensde Strength at 20% (max ) elongation 30ib /lin m(mm ) 3 Sfurry Flow Rate 0 3 ga1/sq ft/mm (min ) 4 Fabric shall contain ultraviolet ray inhibitors and stabilizers to provide a minimum of six months of expected useable construction �ife C Fdter Fabric (for installation under riprap) Woven geotextde fabric apparent opernng ' size no larger than US Standard Sieve No 70 mm grad strength of 1201bs 23 I A ' I1 ' CHANNEL AND SLOPE PROTECTION Jute Netting Provide heavy urnform woven of smgle �ute yarn Install netting over straw mulch and anchor according to manufacturer's recommendations B Manufactured Mats and Blankets Erosion Control Blankets shall be a machme produced mat of agncultural straw a straw and coconut fiber combination or curled wood fiber (excelsior) as specified below or on the drawings The blanket shall be of 01517 0219 / Cat Office Buddmg 02250 2 Erosion and Sedimentation Controls Caterpolar Inc October 27 2011 , � ' 1 ' ' � u ' ' ' EROSION AND SEDIMENTATION CONTROLS consistent thickness with the fiber evenly distnbuted over the entire area of the mat The blanket shall be covered with a photo degradable plastic netting secured to the fiber mat Erosion control blanket shall have the followmg properties Straw Mat a Straw 100°l0 ( 501b/sq yd ) b Netting Top side only photo degradable approx '/Z x'/Z mesh (1 641b/1000 sq ft ) c Thread Cotton 2 Excelsior Mat a Fiber Curled wood excelsior of 80% six inch or longer fiber length with a consistent width of fibers evenly distributed throughout the mat Mat shall be smolder resistant w�th no chemical additives b Top and Bottom Netting Photo degradable extruded plastic netting with maximum mesh size of �/ x�/4 3 Synthetic Mat a Fiber UV stabdized polypropylene fiber matrix (0 71bs /sq yd ) b Top Netting Extra heavyweight UV stabdized polypropylene (51bs/1000 sq ft approx weight) c Bottom Netting Heavyweight UV stabdized polypropylene (31bs/1000 sq ft approx weight) 4 Wire Staples 16 gauge steel wire with mirnmum of 3 top and 6 long legs 1 75 staples per square yard of matting mirnmum , 2 4 RIPRAP , � ' ' , � J A Riprap Provide riprap of the class and quantity mdicated on the Drawings Whde no specific gradation is required the various sizes of the stone shall be equally distributed within the requ�red size range The size of an ind�vidual stone shall be determined by measunng its long dimension Stone shall meet the requirement of the following table for class and size distribution No more than 5% of the material furnished can be less than the minimum size specified nor no more than 10% of the material can exceed the maximum size specified REQUIRED STONE SIZES — INCHES CLASS MINIMUM MIDRANGE MAXIMUM A 2 4 6 B 5 8 12 1 5 10 17 2 9 14 23 01517 0219 / Cat O�ce Buiiding 02250 3 Erosion and Sedimentation Controls Caterpillar Inc October 27 2011 , ' EROSION AND SEDIMENTATION CONTROLS PART 3 — EXECUTION � 31 ' ' ' � ' � , � � � � , � ' � � A 32 r_� B GENERAL Existmg Structures and Facdities 1 Existmg structures facilities and water courses shall be protected from sedimentation 2 The Contractor shalf be responsible for the construction of necessary measures and all costs shall be at the expense of the Contracto� 3 Items to be protected from sedimentation deposits shall inciude but are not limited to all down stream property natural waterways streams lakes and ponds catch basins dramage ditches road gutters and natural buffer zones 4 Control measures such as the erection of sdt fences barriers dams or other structures shall begin prior to any land disturbing activity Additional measures shall be constructed as required during the construction 5 All facilities installed shall be maintained contmuously during construction untd the disturbed areas are stabdized Contractor shall remove all erosion control measures at the end of the pro�ect at his expense unless otherwise directed by the Owner or his representative 6 Perform monitoring and record keeping as specified in this section PROTECTIVE MEASURES Protective measures shall conform to all State and Local requirements Construction and maintenance of sediment and erosion control measures shall be in accordance with all applicable laws codes ordmances rules and regulations 1 Silt Fence Hog wire or wire mesh fastened to posts as recommended by the Manufacturer and covered with sdt fabnc 2 Berms and Diversion Ditches These shall be graded channels with a supporting ridge on the lower side constructed across a sloping land surface Diversion ditches and berms shall be planted in vegetative cover as soon as completed 3 Mulching Mulching shall be used to prevent erosion and to hold sod and seed in place dunng establishment of vegetation 4 Mattmg Temporary matting shall be used for temporary stabdization during the established of seeded cover in all grassed ditches channels long slopes and steep banks (6 1 or greater) as indicated on plans Matting shall be mstalled on any area on site as needed to provide temporary stabilization whether or not matting is indicated on the plan 5 Build Berms Pits and Gravel Filter as shown on Drawings Maintain during construction to keep erosion and sedimentation to a mmimum When is necessary to remove berm pits and gravei return to area to required profiles and condition 6 Construction Entrances Construct alt entrances in accordance with plans Maintain all ingress/egress points to prevent tracking of soil onto the Owner s public or private roads Any sod that is tracked onto the roads shall be removed immediately 01517 0219 / Cat Offlce Buddmg 02250 4 Erosion and Sedimentation Controls Caterpolar Inc October 27 2011 � EROSION AND SEDIMENTATION CONTROLS , ' � ' 33 � ' ' , � ' ' ' , , ' ' � , A B C 34 A 35 A 36 A B 7 Riprap Stone shall be graded so that the smaller stones are uniformly distributed throughout the mass Stone may be placed by mechanical methods augmented by hand placing where necessary provided that when the riprap is completed it forms a properly graded dense neat layer of stone 8 Other Measures Othe� methods of protecting existmg structures and facdities such as vegetative filter strips diversions riprap baffle boards and ditch checks used for reduction of sediment movement and erosion may be used at the option of the Contractor when approved by the appropnate State or Local authonties STABILIZATION Permanently protect stabilized areas prior to the removal of protective devices After the final establishment of permanent stabdization remove temporary sediment control measures Respread accumulated sediments as specified Permanently stabdize all areas disturbed by the removal and re spreading operations immediately TEMPORARY SEEDING In accordance with the schedule as detailed on the drawings PERMANENT SEEDING In accordance with the schedule as detailed on the drawings MULCHING AND MATTING Apply mulch or mattmg to retam soil and grass Mulch areas with slope greater than 5% by spreadmg a light cover of mulch over seeded area at the rate of not less than 851bs per 1000 sq ft C Install temporary matting in all grassed ditches channels long slopes and steep banks (6 1 or greater) and other areas indicated on plans or where extra protection from erosion is needed END OF SECTION 01517 0219 / Cat O�ce Budding 02250 5 Erosion and Sedimentation Controis Caterpillar inc October 27 2011 , � � � � ' ' � LJ , l� ' � ' ' ' SECTION 02300 — EARTHWORK PART 1 — GENERAL 11 SUMMARY A Section Includes 1 Preparing subgrades for site improvements 2 Excavating and backfill�ng for buildings and structures 3 Drainage course for concrete slabs on grade 4 Subbase course for concrete walks and pavements 5 Subbase course and base course for asphalt paving 6 Excavatmg and backfilling for utdity trenches 12 DEFINITIONS A Backfill Soil material used to fill an excavation ,:� 1 Irntial Backfill Backfill placed beside and over pipe in a trench includmg haunches to support sides of pipe 2 Final Backfill Backfill placed over �rntial backfill to fill a trench Base Course Aggregate layer placed between the subbase course and hot mix asphalt pavmg C Bedding Course Aggregate layer placed over the excavated subgrade in a trench before laying pipe D Off—Site Borrow Sod Satisfactory soil imported from off site for use as fill or backfill Borrow should consists of soi�s with less than 3% orgarncs have a maximum particle size of 3 inches a standard Proctor maximum dry unit weight greater than 90 pounds per cubic foot plasticity index of less than 20 percent and liqwd limit less than 50% E Drainage Course Aggregate layer supportmg the slab on grade that also mirnmizes upward capillary flow of pore water F Excavation Removal of material encountered above subgrade elevations and to Imes and dimensions indicated 1 Authorized Additional Excavation Excavation below subgrade elevations ' or beyond indicated lines and dimensions as directed by Engineer Authonzed additional excavation and replacement material wdl be paid for accordmg to Contract provisions � , 01517 0219 / Cat Office Bwlding 02300 1 Earthwork Caterpillar Inc October 27 2011 , � � � � EARTHWORK 2 Unauthorized Excavation Excavation below subgrade elevations or beyond indicated lines and dimensions without direction by Engmeer Unauthorized excavation as well as remedial work directed by Engineer shall be without additional compensation G Fdl Sod matenals used to raise existing grades H Structures Buildings footings foundations retammg walls slabs tanks curbs mechanical and electrical appurtenances or other man made stationary features constructed above or below the ground surface I Subbase Course Aggregate layer placed befinreen the subgrade and base ' course for hot mix asphalt pavement or aggregate layer placed befinreen the subgrade and a cement concrete pavement or a cement concrete or hot mix asphalt walk ' ' � � ' � � ' 1 , ' �I � J Subgrade Uppermost surface of an excavation or the top surface of a fill or backfill immediately below subbase drainage fill drainage course or topsod materials K Utilities On site underground pipes conduits ducts and cables as well as underground services within buildings 1 3 QUALITY ASSURANCE I1 :� Preexcavation Conference Conduct conference prior to work m accordance with the Division One specifications Codes and Standards Perform excavation and grading work in compliance with applicable reqwrements of goverrnng authorities having �urisdiction C Testing and Inspection Service The Owner will engage the services of an Independent Testing Laboratory (ITL) under the direct supervision of a Geotechnical Engineer to provide testing of sod materials proposed for use in the work and field testing facilities for qual�ty control dunng excavation and fill operations D Tests for Proposed Soil Materials 1 Test sod materials proposed for use in the work and promptly submit test result reports 2 Provide one optimum moisture max�mum density curve for each type of sod encountered in subgrade and fills under paved areas Determine maximum densities and optimum moisture contents m accordance with ASTM D 698 3 For off site borrow materials perForm a mecharncal analysis (ASTM D 421) plasticity index (ASTM 4318) and moisture density curve (ASTM D 698) E Field Density Determmations The actual number of field density test shall be determined by the ITL s Geotechrncal Engineer to ensu�e proper compaction of the material 01517 0219 / Cat Office Budding 02300 2 Earthwork Caterpolar Inc October 27 2011 IEARTHWORK ' � , , � ' 14 � ' � 15 ' � � ' ' All fill shall be in accordance with the typical sections as shown on the construction drawmgs for the roads and budding areas 2 Field density tests shall be performed by ASTM D 1566 (Sand Cone Density Method) ASTM D 2937 (Dr�ve Cylmder Method) or in accordance with ASTM D 2922 (Nuclear Density Gage) F Lime Amendment TF�e ITL shall be present to confirm the following 1 Amount of lime spread 2 Lime hydration is consistent throughout treated layer 3 Thickness of lime stabilized layer 4 Compaction of lime stabilized layer 5 Cunng of lime stabdized layer PROJECT CONDITIONS A Utdity Locator Service Notify utility locator service for area where ProJect is located before beginning earth moving operations B Do not commence earth moving operations until sedimentation and erosion control measures and plant protection measures specified in Division 2 Sections and on the plans are in place EXISTING CONDITIONS A Site Information The data shown on the drawing was taken from a topographical survey as prepared by the Owner It is expressly understood that the Owner wdl not be responsibie for interpretations or conclusions drawn there from by the Contractor A subsurface exploration was performed on this site and is avadable for information only The opirnons expressed in this report are those of the geotechrncal engineer and represent interpretations of sod conditions tests and results of analysis conducted by the geotechnical engineer All excavation is unclassified unless noted otherwise Additional test borings and other exploratory operations may be made by the Contractor at no cost to the Owner B Acceptance Contractor is required to accept actual conditions at site and do work specified without additional compensation for possible variation from grades and conditions shown whether surface or subsurface All gradmg work shall be unclassified except when a determination is made by the geotechrncal engineer that the material is unsuitable ' PART 2 — PRODUCTS 21 SOIL MATERIALS � �'� ' A General The Contractor shall be responsible for balancing the site as part of the Base Bid 01517-0219 / Cat Office Buildmg 02300 3 Earthwork Caterpolar Inc October 27 2011 � 1 ' , t ll ' EARTHWORK B Provide off site borrow soil materials as part of the Base Bid when sufficient satisfactory sod matenals are not avadable from excavations C Fill Material Material for fill shall be free from roots wood other organic material or other deleterious matenal Earth used for fill under pavement and other surfaced areas shall be approved by laboratory tests 1 Fill placed in pavement areas shall have a maximum particle size of 3 inches 2 Fdl materials shall have a standard Proctor maximum dry density of at least 90 Ib/cf 3 Use suitable excavated material for required fills and backfills The Independent Testing Laboratory s(ITL s) Geotechnical Engineer wdl determine the suitability of all materials to be used as fill 4 The moisture content of the controlled fill shall be maintained within optimum moisture content (OMC) and +3% for 95% compacted fill and OMC to +5% for 92% compacted fill as determmed by ASTM D 698 (Standard Proctor Moisture Density Test) See Construction Plans for detads ' D Unsatisfactory Soils The ITL will be the sole �udge of whether or not soils are determined to be suitable for use as fiil High moisture content soils will not be classified as unsu�table ' E Bedding Course Naturally or artificially graded mixture of natural or crushed gravel crushed stone and natural or crushed sand ASTM D 2940 except with ' 100 percent passing a 1 mch sieve and not more than 8 percent passing a No 200 sieve � F Drainage Course Narrowly graded mixture of washed crushed stone or crushed or uncrushed gravel ASTM D 448 coarse aggregate gradmg Size 57 with 100 percent passing a 1 1/2 inch sieve and 0 to 5 percent pass�ng a No 8 sieve ' 2 2 ACCESSORIES A Warning Tape Acid and alkali resistant polyethylene film warrnng tape ' manufactured for marking and identifying underground utilities 6 mches wide and 4 mds thick continuousty �nscr�bed with a description of the utdity colored to comply with local practice or requirements of authonties havmg �urisdiction 1 ' ' � ' ' B Detectable Warrnng Tape Acid and alkali resistant polyethylene film warrnng tape manufactured for marking and identifying underground utilities a minimum of 6 inches wide and 4 mds thick contmuously inscribed with a description of the utility with metallic core encased in a protective �acket for corrosion protection detectable by metal detector when tape is buried up to 30 inches deep colored to comply with local practice or requirements of authorities having �unsdiction C L: Fabric Underimer — non woven geotechrncal underliner in accordance with NCDOT — Division 10 Type 1 needle punched only 4% Quicklime — In accordance with NCDOT Standard s for Roads and Structure 2006 Section 501 See construction plans for depth and limits of treatment area 01517 0219 / Cat Office Budding 02300 4 Earthwork Caterpillar Inc October 27 2011 IEARTHWORK � ' ' ' , E #57 Washed Ston� m accordance with NCDOT standards for #57 stone F Subdrain System — consists of blanket dram edge drains and french drains See construction plans for details Note, the geotextde should be placed by hand labor and the NCDOT #57 stone shouid be end dumped from the trucks and pushed out on the geotextde w�th w�de track doaers No equ�pment should be altowed on the geotextile PART 3 — EXECUTION 31 PREPARATION ' ' ' 32 , ' � ' 1 ' ' ' C� � A Protect structures utdities sidewaiks pavements and other facdities from damage caused by settlement lateral movement undermirnng washout and other hazards created by earth movmg operations 0 C Protect and maintain erosion and sedimentation controls durmg earth moving operations Protect subgrades and foundation sods from freezing temperatures and frost Remove temporary protection before placmg subsequent matenals EXCAVATION, GENERAL 2 3 4 Unclassified Excavation Excavate to subgrade elevations regardless of the character of surface and subsurface conditions encountered as part of the Base Bid Classified Excavation See Division One Section for detads Above Groundwater Level a Excavations at least 2 feet above groundwater levels will typically extend through moderate to high consistency natural soils predominantly consisting of clays and sdts Past experience indicates but does not guarantee that these matenais can be excavated using conventional earth moving equipment including dozers pans scrapers and excavators Local excavations for shallow utdity trenches and foundations can likely be accomplished by a conventional backhoe Near or Below Groundwater Levels a Excavations within 2 feet and below groundwater levels will extend through moderate to high consistency natural sods consisting of clays sdts and sands As groundwater levels are approached specialized equipment such as wide track dozers all terrain dump trucks track excavators etc may be required to be used to excavate these materials for protection of subgrade The 01517 0219 / Cat Office Budding 02300 5 Earthwork Caterpolar Inc October 27 2011 � ill u � �� ' � � � � , , EARTHWORK excavations below the groundwater table may be accomplished by a track backhoe with smooth face bucket top loading all terrain dump trucks and pans Construction equipment may not be allowed on the final grades m these areas If pans are able to operate betow the water table m the firm to stiff clays their operations should cease at least 2 feet above the final grades and these final sods removed by backhoes top loadmg all terram dump trucks and pans No construction eqwpment should be ailowed to disturb the soils at the final grades b Groundwater infiltration will likely occur m excavations extending below groundwater levels Groundwater infiltration may reduce stability of excavation slopes and may soften subgrades withm excavation bottoms The contractor should be prepared to install adequate drainage measures such as French drains open ditches internal sumps and pumps to keep groundwater at least 2 feet below final excavation grades as part of the Base Bid The final grading plans call for drainage swales or ditches m the cut areas of the infield Early excavation of these dramage features will expedite subsurface drainage and help lower water tables 3 3 EXCAVATION FOR STRUCTURES A Excavate to indicated elevations and dimensions within a tolerance of plus or minus 1 inch If applicable extend excavations a sufficient distance from structures for placing and removing concrete formwork for installing services and other construction and for mspe�t�ons ' ' ' � ' 34 ' ' ' ' 35 � Excavations for Footmgs and Foundations Do not disturb bottom of excavation Excavate by hand to final grade �ust before placing concrete reinforcement Trim bottoms to required lines and grades to leave solid base to receive other work Excavations at Edges of Tree- and Plant Protection Zones Excavate by hand to indicated Imes cross sections elevations and subgrades Use narrow tine spading forks to comb soil and expose roots Do not break tear or chop exposed roots Do not use mechanical equipment that rips tears or pulls roots 2 Cut and protect roots according to requirements in Division 2 Section EXCAVATION FOR WALKS AND PAVEMENTS A Excavate surfaces under walks and pavements to indicated lines cross sections elevations and subgrades EXCAVATION FOR UTILITY TRENCHES A Excavate trenches to indicated grad�ents lines depths and elevafions 01517-0219 / Cat O�ce Buddmg 02300 6 Earthwork Caterpolar Inc October 27 2011 � ' � ' EARTHWORK B Excavate trenches to uniform widths to provide the following clearance on each side of pipe or conduit Excavate trench walls vertically from trench bottom to 12 inches higher than top of pipe or conduit unless otherwise mdicated C Trench Bottoms Excavate and shape trench bottoms to provide urnform bearing and support of pipes and conduit Shape subgrade to provide continuous support for be11s �o�nts and barrels of pipes and for �oints fittings and bodies of conduits Remove pro�ecting stones and sharp ob�ects along trench subgrade � 1 Excavate trenches 6 inches deeper than elevation required in �ock o� other unyielding bearing matenal 4 inches deeper elsewhere to allow for bedding course , ' ' � ' 36 ' ' � ' , 37 ' , ' , D Trenches in Tree and Piant Protection Zones 2 3 Hand excavate to indicated Imes cross sections elevations and subgrades Use narrow tme spading forks to comb sod and expose roots Do not break tear or chop exposed roots Do not use mechanical equipment that nps tears or pulls roots Do not cut main lateral roots or taproots cut only smalier roots that interfere with installation of utdities Cut and protect roots according to requirements m Division 2 Section SUBGRADE INSPECTION A Proof rolf subgrade w�th a pneumatic tired dump truck to identify soft pockets and areas of excess yieldmg Do not proof roll wet or saturated subgrades All subgrade to receive �II shall be evaluated by the Geotechrncal Engineer pnor to placing new fill Methods for evaluation shall include proof�olling using a tandem axle dump truck or s�milar pneumatic tired equipment or other methods as specified by the on site Geotechnical Engineer or his techrncian All sod that ruts pumps or deflects excessively as determined by the ITL shall be corrected as specified by the on site Geotechnical Engineer B Reconstruct subgrades damaged by freezing temperatures frost ram accumulated water or construction activities as directed by Engmeer without additional compensation UNAUTHORIZED EXCAVATION A Fill unauthorized excavation under foundations or wall footings by extendmg bottom elevation of concrete foundation or footing to excavation bottom without altering top elevation Lean concrete fill with 28 day compressive strength of 2500 psi may be used when approved by Engineer Fi11 unauthorized excavations under other construction pipe or conduit as directed by Engineer 01517 0219 / Cat Office Buddmg 02300 7 Earthwork Caterpolar Inc October 27 2011 i� � , ' � ' ' ' � ' � ' � � � ' , ' ' , EARTHWORK 3 8 STORAGE OF SOIL MATERIALS A Stockpile borrow soil materials and excavated satisfactory sod materials without intermixing Place grade and shape stockpiles to dram surface water Cover to prevent windblown dust 1 Stockpde soil matenals away from edge of excavations Do not store w�th�n drip line of remaming trees 3 9 UTILITY TRENCH BACKFILL A Place backfill on subgrades free of mud ftost snow or �ce B Place and compact bedding course on trench bottoms and where indicated Shape bedding course to provide continuous support for bells �omts and barrels of pipes and for �oints fittings and bodies of conduits C Trenches under Footings Backfill trenches excavated under footings and within 18 inches of bottom of footmgs with satisfactory soil fill with concrete to elevation of bottom of footings Concrete is specified m Dwision 3 Section '�� E F Place and compact initial backfill of satisfactory sod free of particles larger than 1 inch any dimension to a height of 12 inches over the pipe or conduit 1 Carefully compact irntial backfill under pipe haunches and compact evenly up on both sides and along the full length of piping or conduit to avoid damage or displacement of piping or condu�t Coordmate backfill�ng with utdities testing Place and compact final backfill of satisfactory soil to final subgrade elevation Install warning tape directly above utilities 12 inches below firnshed grade except 6 inches below subgrade under pavements and slabs 310 SOIL FILL A B Plow scarify bench or break up sloped surfaces steeper than 1 vertical to 4 horizontal so fill material wdl bond with existing material Place and compact fill material m layers to required elevations as follows 1 2 3 4 5 Under grass and planted areas use satisfactory soil material Under walks and pavements use satisfactory sod matenal Under steps and ramps use engineered fill Under building slabs use engineered fill Under footings and foundations use engmeered fill C Settlement 01517 0219 / Cat Office Budding 02300 8 Earthworlc Caterpiilar Inc October 27 2011 � ' ' � � EARTHWORK In order to monitor the fill settlement in pavement and building areas where more than 5 feet of fill �s placed, settlement plates shall be supplied and installed at the base of the fill 6y the ITL Once these areas have been raised to design subgrade elevat�on, settlement hubs shall be installed at the surface by the ITL The elevation of the plates and hubs shall be measured at least twice weekly by a reg�stered land surveyor paid by the Contractor and this data shouid be provided to both the geotechnical engmeer and the Engineer Asphalt paving operations and foundation construction shall not begm �n these areas unt�l monitor�ng of settlement plates and hubs �ndicates that fill mduced settlement has stabilized � 2 Based on t�rr�e rate consolidation analysis, 90 percent or more of the settlement will occur withm 1 to 4 weeks after completion of fill placement Therefore, based on this analysis �t would appear , pavement construct�on could begin 3 to 4 weeks after the complet�on of fill placement ' � ' ' ' � ' , � � lI � 3 The Contractor shall be responsible for protectmg these plates and hubs 311 SOIL MOISTURE CONTROL A Uniformly aerate or add moisture to subgrade and each subsequent fill or backfill sod layer to place the fill at OMC to 3 percent wet of OMC for areas requiring 95 percent of the standard Proctor maximum dry density and OMC to 5 percent wet of OMC for areas requiring 92 percent compaction before compaction Do not place backfill or fill soil materiai on surfaces that are muddy frozen or contain frost or ice 2 Remove and replace or scarify and air dry otherwise satisfactory sod matenal that does not achieve the above moisture requirements and is too wet to compact to specified dry urnt weight B Hegh Moisture Content Soils It should be noted that high mo�sture content sods shall not be deemed unsuitable due to mo�sture conten� The Contractor shaU be responsible for dry�ng these sods as part of the Base B�d if the Contractor elects, at his sole d�scretion to facditate the construct�on of the pro�ect, lime may be added to facd�tate the drying of the sods to maintain the progress of the work The adding of I�me to facd�tate the drying of the so�is at the Contractors discret�on wdl be performed as part of the Base B�d, for no additional costs The Contractor shall ant�cipate significant scarifying, windrow�ng and aerating of exist�ng soils to achieve the specified compact�on moisture ranges pr�or to use as structural fill 312 COMPACTION OF SOIL BACKFILLS AND FILLS A All structural fill shall be placed in 8 to 10 mch loose tifts The geotechnical engineer or a qualified sod techrncian working under the direction of the 01517 0219 / Cat Office Budding 02300 9 Earthwork Caterpolar Inc October 27 2011 , ' ' ' � � � ' ' , � ' ' ' ' ' ' ' ' B C�7 L� EARTHWORK geotechnical engineer shall observe site preparation and fill placement operations A su�cient number of density tests and moisture checks shall be performed dunng fill placement to confirm that the recommended degree of compaction and moisture ranges are being achieved Place backfill and fill sod materials in layers not more than 4 inches in loose depth for material compacted by hand operated tampers Place backfill and fill sod materials evenly on all sides of structures to required elevations and uniformly along the full length of each structure Compact sod materials to not less than the following percentages of maximum dry unit weight according to ASTM D 698 Pavement Areas a Pavement areas include those areas beneath the pavement and extendmg out 10 feet on either side fn these areas structural fili shall be compacted to at least 95 percent of the standard Proctor maximum dry density (ASTM D 698) In order to achieve 95 percent compaction and obtain a moisture range that reduces future swell potential of the plastic soils the fill soils wdl shall be placed �n a moisture range of OMC to 3 percent wet of OMC b The final 12 inches in pavement areas shall consist of soils stabilized using 4 percent quicklime by dry weight This stabdized zone shall extend 5 feet outside the pavement box on both sides See plans for detads Recommendations regardmg {ime stabdization are presented in section 6 4 2 of the geotechnical report Lime treated soils shall be compacted to 98 percent of their lime treated standard Proctor maximum dry density and in a moisture range of OMC to 3 percent wet of OMC Suffiaent moisture shall be present m the sods to activate (hydrate) the lime Literature and expenence suggests this will likely require the moistures to be closer to the 3 percent wet of OMC Lime treatment of the top 12 inches of subgrade shall be performed in the cut areas where groundwater tables are 2 feet or greater below the bottom of the pavement section See plans for details c Fdl piaced in the road shoulder areas (10 feet outside the pavement edges) shall be compacted to at least 95 percent of the soil s standard Proctor maximum dry density in a moisture range of OMC to 3 percent wet of OMC These sods shall consist of the clayey sods having maximum plasticity indices (Pls) of 35 percent The reason for placing clayey soils in the road shoulder is to reduce moisture penetration beside the pavement section and into the subgrade sods 2 Infield Areas 01517 0219 / Cat Office Bwlding 02300 10 Earthwork Caterpillar Inc October 27 2011 � � , � ' ' � � � ' � J ' ' ' , � '�, ' �� 4 EARTHWORK a Structural fill placed in the infieid areas shall be compacted to at least 92 percent of the standard Proctor maximum dry density (ASTM D 698) with exception of the final foot which shall receive 95 percent compaction In order to achieve 92 percent compaction the moisture content of these fill sods shall be reduced to no greater than 5 percent wet of their OMC At these moisture levels the fill sections wdl most likely be unstable and some ruttmg may occur under heavy rubber tired equipment If trafficabilty issues develop the contractor shall perform some additional sod drying or use lighter ground contact pressure equipment In order to achieve 95 percent compaction the moisture content of these fill sods shall be reduced to at least 3 percent wet of the soil s OMC Building Areas a From a fill placement standpoint the buildmg areas shall include the building pad footprmt and an area extending 10 feet beyond the footprint On site soils may be used as structural fill in the proposed building areas The final 12 inches at the subgrade level shall be stabdized with 4 percent lime by dry sod weight to reduce the sod s plasticity and mcrease slab subgrade support b Fill sods placed below the final 12 mches in the building areas shall be compacted to at least 95 percent of their standard Proctor maximum dry density (ASTM D 698) The moisture content of these fill sods shall be mamtained between OMC and 3 percent wet of their OMC during compaction to reduce future swelling potential c Lime stabilized sods placed in the final 12 inches below final grade in building areas shall be compacted to 98 percent of their lime treated standard Proctor maximum dry density (ASTM D 698) The moisture content of these fill sods shall be in a range of OMC to 3 percent wet of OMC Sufficient moisture shall be present in the soils to activate (hydrate) the lime which wili most likely require the moistures to be closer to the 3 percent wet of OMC For utd�ty trenches compact each layer of mitial and final backfill sod material to 95 percent standard Proctor compaction 313 LIME AMENDMENT A General The lime amendment program wili consist of using lime for stabdization and drying purposes Lime amendment will be required to stabilize subgrade sods in the building and pavement areas (cut and fill sections) and may also be needed for drying some of the soils that have excessive mo�sture contents to obtain the recommended degree of compaction Construction considerations regarding both lime stabilization and drying are descnbed in the followmg sections It should be noted that quicklime is an alkaline matenal that is reactive 01517 0219 / Cat Office Bwlding 02300 11 Earthwork Caterpolar Inc October 27 2011 � � � ' , ' � ' ' l__I ' ' l_ J � � ' EARTHWORK in the presence of moisture Construction workers should be made aware of the hazards associated with lime including (but not limited to) eye irritation skm burns (both chemical and thermal) and inhalation hazards B Drying Due to the relatively h�gh natural mo�sture contents of some of the on site sods quicklime may be required in areas requinng 95 percent compaction to expedite fill placement by lowering in situ moistures and causing some slight improvement in the sod plasticity characteristics Lime should only be used for drying sods with moisture contents greater than 6 percent of the sod s OMC The adding of lime to facilitate the dry�ng of the so�is at the Contractors discretion will be performed as part of the Base B�d, for no addit�onal costs to the Owner 2 Lime for drying wdl typically require mixing 1 to 2 percent lime by dry weight into the soils With the addition of quicklime the moisture content of the sods is reduced by the following processes a b c Chemical combination of water and lime evaporates water Heat from the reaction increases evaporation Chemical changes in the sod reduce its capacity to hold water 3 The lime drying process typically consists of the following steps a b c d Scarifymg soil layer m the borrow or fill areas Spreading of lime at a rate determined by the lime contractor in the field at time of grading Rotor m�xmg the lime into the sod Allowing sufficient time for the lime to react with the sods for drymg to occur e Removal of the time treated layer from the cut area and transport to the fill section for placement and compaction or compaction of the lime treated layer in the fill section 4 The amount of quicklime required to dry the sods and construction meth , ods wdl be dependent upon conditions encountered durmg construction and should be determined by a qualified contractor experienced with lime modification Lime modification should not be performed on frozen soil ' 1 01517-0219 / Cat O�ce Buddmg 02300 12 Earthwork Caterpolar Inc October 27 2011 , , ' � � ' � ' � ' C Stabdization 2 EARTHWORK Due to low California Bearmg Ratio (CBR) values and the tendency af highly plastic soils to shrink/swell with changes in moisture content the fi nal 12 inches of subgrade in both cuts and fills of pavement and building pad areas shall be lime stabilized Based on laboratory testmg 4 percent lime by dry weight shall be incor porated into the upper 12 mches of subgrade within the buddmg and pavement limits and 5 feet beyond those limits The lime stabilization construction process typically consists of the following steps a Bringing sod layer to desired grade b Scarifying sod layer and partial pulverization c Spreading of quickiime at a rate of at least 4 percent by dry weight d Rotor mixing of lime with soil while hydratmg the lime e Allowmg sod to mellow for a sufficient penod to allow the chemical reaction to occur f Further rotor mixing and pulverizing lime amended sod to achieve thorough mixing Obtainmg proper moisture in the soils for com paction g Compacting soil/lime mixture to desired compaction level h Cunng of sod by sealing the compacted layer with a bitummous pnme coat emulsion D Requirements 1 Lime stabilization methods should be performed m general accordance ' with the 2006 North Carolina Department of Transportation (NCDOT) Standard Specificat�ons for Roads and Structures Section 501 Lime stab�lizat�on shoufd not be performed when the air temperature is below ' 45 degrees Fahrenheit Lime should only be applied m areas that can be irntially mixed and sealed during the day of application Lime should not be applied in windy conditions ' � � J � � � l; 314 GRADING A General Uniformly grade areas to a smooth surtace free of irregular surface changes Comply with compaction requ�rements and grade to cross sections lines and elevations indicated B Site Rough Grading Slope grades to direct water away from buddings and to prevent ponding Firnsh subgrades to required eievations within the following tolerances Turf or Unpaved Areas Plus or minus1 inch 2 Walks Plus or minus 1 inch 01517 0219 / Cat Office Buildmg 02300 13 Earthwork Caterpolar Inc October 27 2011 � ' ' � C U EARTHWORK 3 Pavements Plus or minus '/Z inch unless otherwise called out in these specifications or drawings Grading inside Budding Lines Firnsh subgrade to a tolerance of '/z mch when tested with a 10 foot straightedge Exposed subgrades shall be sloped and sealed on a dady basis to promote runoff and reduce infiltration from rainfall ' 315 SUBBASE AND BASE COURSES UNDER PAVEMENTS AND WALKS L�� ' ' , ' ' , L� ' ' , ' � � A � Place subbase course or base course on subgrades free of mud frost snow or ice On prepared subgrade place subbase course or base course under pavements and walks as follows 1 Shape subbase course or base course to required crown elevations and cross slope grades Note Special care and extra effort should be taken w�thin the Vehicle Dynamics Area and Ride and Handl�ng Course to achieve the grades and slopes as shown on the plans Tolerance for the subbase course and grading for R�H course 8� VDA area shall be plus or m�nus'/Z �nch 2 Place subbase course or base course that exceeds 6 mches in compacted thickness in layers of equal thickness with no compacted layer more than 6 inches thick or less than 3 mches thick 3 Compact subbase course and base course to required grades lines cross sections and thickness 316 FIELD QUALITY CONTROL A Testing Agency Owner will engage a qualified geotechrncal engineering testing agency to perform tests and observations B Allow testing agency to observe and test subgrades and each fill or backfill layer Proceed with subsequent earth moving only after test results for previously completed work comply with reqwrements C Footing Subgrade At footing subgrades at least one test of each soil stratum shall be perfo�med to verify design bearing capacities Subsequent verification and approval of other footing subgrades may be based on a visual comparison of subgrade with tested subgrade when approved by Engineer D When testing agency reports that subgrades fills or backfilis have not achieved degree of compaction specified scarify and moisten or aerate or remove and replace soil materials to depth required recompact and retest until specified compaction is obtained 01517 0219 / Cat Office Bwlding 02300 14 Earthwork Caterpolar Inc October 27 2011 ' I� , ' ' ' �I ' � � � ' ' � l� ' ' ' ' EARTHWORK 317 PROTECTION A Protecting Graded Areas Protect newly graded areas from traffic freezing and erosion Keep free of trash and debns B Repair and reestablish grades to specified tolerances where completed or partially completed surfaces become eroded rutted settled or where they lose compa�tion due to subsequent construction operations or weather conditions C Where settling occurs before Pro�ect correction period elapses remove finished surfacmg backfill with additional soil material compact and reconstruct surfacing Restore appearance quality and condition of firnshed surfacing to match ad�acent work and eliminate evidence of restoration to greatest extent possible D Where completed graded areas are disturbed by subsequent construction operations or erosion regrade to the required elevations and compact to the required density pnor to further construction Work shall include repair and reestablishment of grades in settled eroded and rutted areas E The Contractor shall exercise care to assure that the landscaped and natural areas shall not be contaminated with stone Should these areas be contaminated the stone shall be removed to the satisfaction of the Engineer F All costs associated with the repair of graded areas and subgrade due to subsequent construction activities wdl be performed as part of the Base Bid at no additional cost to the Owner G The Contcactor shall be aware that based on the soi{ and groundwater conditions on this pro�ect non traditionai means and methods to be solely selected by the Contractor may be required to make excavations protect the subgrade place and compact fill and stone and construct pavements 318 DISPOSAL OF SURPLUS AND WASTE MATERIALS A Remove surplus satisfactory sod and waste matenals includmg unsatisfactory sod trash and debris and legally dispose of them off Owner s property B Excess Material Should excess suitable soil be available after finish grades have been achieved the Owner may elect the Contractor to place such excess sod on site as compacted fili The Contractor wdl be required to place this sod at no additional cost to the Owner m an area designated by the Engineer and shall include such activities such as subgrade preparation placement as compacted fill and permanent stabdization Otherwise the Contractor wdl be responsible for disposmg of this material legally off site at his expense END OF SECTION 02300 01517-0219 / Cat Office Bwlding 02300 15 Earthwork Caterpolar Inc October 27 2011 ' ' � � ' ' ' , , ' ' � ' ' ' � � ' �� SECTION 02630 — STORM DRAINAGE PART 1 — GENERAL 11 SUMMARY A Section Includes 1 Channel drainage systems 2 Catch basins 3 Stormwater mlets 4 Pipe outlets 12 SUBMITTALS A Product Data For each type of product indicated B Shop Drawings 1 Manholes Include pians elevations sections details frames and covers 2 Catch basins and stormwater inlets Include pians elevations sections details frames covers and grates C Coordmation Drawings Show pipe sizes locations and elevations Show other p�pmg in same trench and clearances from storm dramage system piping Indicate interFace and spatial relationship befinreen manholes piping and proximate structures D Field quality control reports 13 STANDARDS A Products and methods of execution are speafied by reference to North Carolina State Department of Transportation and Highway Safety s Standard Specifications for Roads and Structures latest edition The abbreviation NCDOT is used to designate this publication Equivalent alternate products and methods of execution as defined by the specifications All methods and substitutions must be approved by the Engmeer B All installation and matenal furnished shall be meet the requirements of the above specifications 1 4 PROJECT CONDITIONS 01517 0219 / Cat D�ce Building 02630 1 Storm Dramage Caterpolar Inc October 27 2011 ' � ' � � ' � � � �'� � ' ' , u � � ' ' STORM DRAINAGE A Interruption of Existing Storm Drainage Service Do not mterrupt service to facilities occupied by Owner or others unless permitted under the following conditions and then only after arranging to provide temporary service accordmg to requirements mdicated 1 2 Notify Engmeer no fewer than two days m advance of proposed interruption of service Do not proceed with interruption of service without Engineer's written permission PART 2 — PRODU�TS 21 CATCH BASINS A Standard Precast Concrete Catch Basins 1 Descnption ASTM C 478 precast reinforced concrete of depth indicated with provision for sealant �oints 2 Base Section 6 inch mmimum thickness for floor slab and 4 inch minimum thickness for walls and base riser section and separate base slab or base section with mtegral floor 3 4 � Riser Sections 4 mch minimum thickness 48 inch diameter and lengths to provide depth indicated Top Section Eccentric cone type unless concentnc cone or flat slab top type is indicated Top of cone of size that matches grade nngs Joint Sealant ASTM C 990 bitumen or butyl rubber 6 Ad�usting Rings Interlocking nngs with level or sloped edge in thickness and shape matching catch basin frame and grate Inciude sealant recommended by rmg manufacturer 7 Grade Rings Include finro or three reinforced concrete rings of 6 to 9 mch total thickness that match 24 mch diameter frame and grate 8 Steps Wide enough to allow worker to place both feet on one step and designed to prevent lateral slippage off step Cast or anchor steps into sidewalis at 12- to 16 inch mtervals 9 Pipe Connectors ASTM C 923 resd�ent of size required for each pipe connecting to base section B Frames and Grates ASTM A 536 Grade 60-40 18 ductde iron designed for A 16 structural loading Include flat grate with small square or short slotted drainage openings 1 Size 24 by 24 mches mirnmum unless otherwise indicated 01517 0219 / Cat Office Budding 02630 2 Storm Drainage Caterpolar Inc October 27 2011 � ' � � STORM DRAINAGE 2 Grate Free Area Approximately 50 percent unless otherwise mdicated C Frames and Grates ASTM A 536 Grade 60 40 18 ductile iron designed for A 16 structural loading Include 24 inch ID by 7 to 9 inch riser with 4 inch minimum width flange and 26 mch diameter flat grate with small square or short slotted drainage openmgs 1 Grate Free Area Approximately 50 percent unless otherwise indicated , 2 2 STORMWATER INLETS ' ' , ' � ' ' ' � ' C � L ' r1 L'3 Curb Inlets Made with vertical curb opening of materials and dimensions according to utdity standards Gutter Inlets Made with horizontal gutter opening, of materials and dimensions according to utdity standards Include heavy duty frames and grates C Combination Inlets Made with vertical curb and horizontal gutter opernngs, of materials and dimensions according to utdity standards Include heavy duty frames and grates D Frames and Grates Heavy duty according to utdity standards 2 3 PIPE OUTLETS A Riprap Basins Broken irregularly sized and shaped graded stone according to NSSGA s Quarned Stone for Erosion and Sediment Control 1 2 3 Average Size NSSGA No R 3 screen opernng 2 inches Average Size NSSGA No R-4 screen opernng 3 inches Average Size NSSGA No R 5 screen openmg 5 inches B Filte� Stone According to NSSGA s Quarried Stone for Erosion and Sediment Control No FS 2 No 4 screen openmg average size graded stone C Energy Dissipaters According to NSSGA s Quarried Stone for Erosion and Sediment Control No A 1 3 ton average weight armor stone unless otherwise indicated PART 3 — EXECUTION 31 EARTHWORK A Excavation trenching and backfilling are specified in Division 2 Section Earthwork 01517 0219 ! Cat Office Buddmg 02630 3 Storm Drainage Caterpillar Inc October 27 2011 ISTORM DRAINAGE � 32 ' � PIPING INSTALLATION A General Locations and Arrangements Drawing plans and detads indicate general location and arrangement of underground storm drainage pipmg Location and arrangement of pipmg layout take into account design considerations Install piping as indicated to extent practical Where specific mstallation is not indicated follow piping manufacturer s written instructions B Install piping beginrnng at low pomt true to grades and alignment indicated with , unbroken continuity of mvert Place bell ends of piping facing upstream Install gaskets seais sleeves and couplings accordmg to manufacturer s written mstructions for use of lubricants cements and other mstallation requirements � ' ' 33 � 34 , , , , ' ' � ' , � C � When installmg pipe under streets or other obstructions that cannot be disturbed use pipe �ackmg process of microtunneling Install gravity flow nonpressu�e drainage piping according to the followmg 1 Install piping pitched down in direction of flow CATCH BASIN INSTALLATION A Set frames and grates to elevations indicated STORMWATER INLET[ AND OUTLET] INSTALLATION A B C D E Construct inlet head walis aprons and sides of reinforced concrete as indicated Construct riprap of broken stone as indicated Install outlets that spol onto grade anchored with concrete where indicated lnstall outlets that spill onto grade with flared end sections that match pipe where indicated Construct energy dissipaters at outlets as indicated END OF SECTION 02630 01517 0219 / Cat Office Bwlding 02630 4 Storm Drainage Caterpolar Inc October 27 2011 � '� ' ' � ' � u � ' , L_J ' ' , , L', ' ' ' SECTION 02920 — LAWNS AND GRASSES PART 1 — GENERAL 11 SUMMARY A Section Includes 1 Seedmg 2 Soddmg 12 DEFINITIONS A Duff Layer The surface layer of native topsod that is composed of mostly decayed leaves twigs and detntus B Firnsh Grade Elevation of firnshed surface of planting sod C Pesticide A substance or mixture intended for preventing destroying repelling or mitigating a pest This mc�udes insecticides miticides herbicides fungicides rodenticides and mollusc�cides It also includes substances or mixtures intended for use as a plant regulator defoliant or desiccant D Pests Living orgarnsms that occur where they are not desired or that cause damage to plants arnmals or people These include insects mites grubs mollusks (snads and slugs) rodents (gophers moles and mice) unwanted plants (weeds) fungi bacteria and viruses E Planting Soil Standardized topsod ex�sting native surface topsoA existmg in place surFace soil imported topsod or manufactured topsoil that is modified with sod amendments and perhaps fertdizers to produce a sod mixture best for plant growth F ., r Subgrade Surface or elevation of subsoil remammg after excavation is complete or top surface of a fill or backfill before plantmg soil is placed Subsoil All soil beneath the topsoil layer of the soil profile and typified by the lack of orgarnc matter and sod orgarnsms H Surface Soil Whatever soil is present at the top layer of the existing sod profile at the Pro�ect site In undisturbed areas the surface sod is typically topsod but m disturbed areas such as urban environments the surFace sod can be subsoil 13 SUBMITTALS A 0 Product Data For each type of product indicated Certification of grass seed 01517 0219 / Cat Office Budding 02920 1 Lawns and Grasses Caterpolar Inc October 27 2011 , LAWNS AND GRASSES � , � � � ' , � 1 Certification of each seed mixture for turFgrass sod C Product certificates 1 4 QUALITY ASSURANCE � 15 ' A B installers Field Supervision Require Instalter to mamtain an experienced full time supervisor on Pro�ect site when work is m progress 1 Pesticide Applicator State licensed commeraal Sod Analysis For each unamended soil type furnish soil analysis and a wntten report by a qualified sod testing laboratory 1 2 The soil testing laboratory shall oversee soil sampling Report swtability of tested sod for turf growth a State recommendations for nitrogen phosphorus and potash nutnents and sod amendments to be added to produce satisfactory planting soil suitable for healthy viable plants b Report presence of problem salts mmerals or heavy metals if present provide additional recommendations for corrective action DELIVERY, STORAGE, AND HANDLING A Seed and Other Packaged Materials Deliver packaged matenals in original unopened containers showing weight certified analysis name and address of manufacturer and indication of conformance with state and federal laws as applicable , B Sod Harvest deliver store and handle sod according to requirements in Specifications for Turfgrass Sod Materials and Specifications for Turfgrass Sod Transplanting and Instailation in TPI s Guidelme Specifications to Turfgrass ' Sodding Delroer sod in time for planting within 24 hours of harvesting Protect sod from breakage and drying , � ' � , � 1 6 MAINTENANCE SERVICE A (nitial Turf Mamtenance Service Provide full maintenance by skilled employees of landscape Installer Maintain as required in Part 3 Begin maintenance immediately after each area is planted and continue untd acceptable turf is established but for not less than the following periods 1 2 Seeded Turf Substantial Completion a When initial maintenance penod has not elapsed before end of planting season or if turF is not fully established contmue mamtenance durmg next planting season Sodded Turf Substantial Completion 01517 0219 / Cat Office Bwlding 02920 2 Lawns and Grasses Caterpillar Inc October 27 2011 ' � � PART 2 — PRODUCTS 21 SEED � � � 22 � � ' � , � ' � � , l- J , LAWNS AND GRASSES A Grass Seed Fresh clean dry new crop seed complying with AOSA s Journal of Seed Technology Rules for Testing Seeds for purity and germination tolerances B Seed Species State certified seed of grass species as follows 1 See Plans for approved seed mix references INORGANIC SOIL AMENDMENTS A Lime ASTM C 602 agncultural liming material contaming a mirnmum of 8Q percent calcium carbonate equivalent and as follows 1 Class T with a mirnmum of 99 percent passing through No 8 sieve and a minimum of 75 percent passing through No 60 sieve 2 Class O with a minimum of 95 percent passmg through No 8 sieve and a mirnmum of 55 percent passing through No 60 sieve B Sulfur Granular biodegradable containmg a mirnmum of 90 percent sulfur and with a minimum of 99 percent passing through No 6 sieve and a maximum of 10 percent passing through No 40 sieve C Iron Sulfate Granulated ferrous sulfate containmg a mmimum of 20 percent iron and 10 percent sulfur D Aluminum Suifate Commercial grade unadulterated E Perlite Horticultural perlite soil amendment grade F Agncultural Gypsum Minimum 90 percent calcium sulfate finely ground with 90 percent passing through No 50 sieve G Sand Clean washed natural or manufactured and free of toxic materials H Diatomaceous Earth Calcined 90 percent silica with approximately 140 percent water absorption capacity by weight I Zeolites Mineral clmoptdolite with at least 60 percent water absorption by weight 2 3 ORGANIC SOIL AMENDMENTS 01517 0219 / Cat Office Bwldmg 02920 3 Lawns and Grasses ' Caterpillar Inc October 27 2011 � � -, � � � ' � � � LAWNS AND GRASSES A Compost Well composted stable and weed free organic matter pH range of 5 5 to 8 moisture content 35 to 55 percent by weight 100 percent passmg through 1 inch sieve soluble salt content of 5 decisiemens/m not exceeding 0 5 percent inert contaminants and free of substances toxic to plantings B Sphagnum Peat Partially decomposed sphagnum peat moss finely divided or of granular texture with a pH range of 3 4 to 4 8 C Muck Peat Partially decomposed moss peat native peat or reed sedge peat finely divided or of granular texture with a pH range of 6 to 7 5 and havmg a water absorbing capacity of 1100 to 2000 percent D Wood Denvatives Decomposed rntrogen treated wood waste of urnform texture and free of chips materials sawdust ground bark or stones sticks sod or toxic E Manure Weil rotted unleached stable or cattle manure containmg not more than 25 percent by volume of straw sawdust or other bedding materials free of toxic substances stones sticks soil weed seed and material harmful to plant growth 2 4 FERTILIZERS � � ' � � 25 � , � 26 � � A Commercial Fertilizer Commercial grade complete fertdizer of neutral character consistmg of fast and slow release rntrogen 50 percent denved from natural orgarnc sources of urea formaldehyde phosphorous and potassium in the following composition � 1 Composition 1 Ib/1000 sq ft of actual nitrogen 4 percent phosphorous and 2 percent potassium by weight Slow Release Fertilizer Granular or pelleted fertilizer consistmg of 50 percent water insoluble nitrogen phosphorus and potassium m the following composition 1 Composition 20 percent nitrogen 10 percent phosphorous and 10 percent potassium by weight MULCHES A L3 Straw Mulch Provide air dry clean mddew and seed free salt hay or threshed straw of wheat rye oats or barley Sphagnum Peat Mulch Partially decomposed sphagnum peat moss finely divided or of granular texture and with a pH range of 3 4 to 4 8 C Muck Peat Mulch Partially decomposed moss peat native peat or reed sedge peat finely divided or of granular texture with a pH range of 6 to 7 5 and having a water absorbing capacity of 1100 to 2000 percent PESTICIDES 01517 0219 / Cat Office Budding 02920 4 Lawns and Grasses Caterpolar Inc October 27 2011 ' LJ ' � �_ 1 ' ' � ' � � � � 1 ' � LAWNS AND GRASSES A General Pesticide registered and approved by EPA acceptable to authorities havmg �urisdiction and of type recommended by manufacturer for each specific problem and as required for Pro�ect conditions and application Do not use restncted pesticides unless authorized m writing by authonties having �urisdiction PART 3 — EXECUTION 31 TURF AREA PREPARATION A Newly Graded Subgrades Loosen subgrade to a minimum depth of 4 mches Remove stones larger than I inch in any dimension and sticks roots rubbish and other extraneous matter and legally dispose of them off Owner s property 1 Apply fertilizer directly to subgrade before loosening 2 Thoroughly blend planting soil off site before spreading or spread topsoil apply sod amendments and fertdizer on surface and thoroughly blend planting sod �:3 3 Spread topsoil plantmg soil to a depth approved by Owner but not less than required to meet firnsh grades after light rolling and natural settlement Do not spread if planting sod or subgrade is frozen muddy or excessively wet a Reduce elevation of planting soil to allow for soil thickness of sod Unchanged Subgrades If turf is to be planted m areas unaltered or undisturbed by excavating grading or surface soil stnpping operations prepare surface soil as follows 1 Remove existing grass vegetation and turf Do not mix into surface soil 2 Loosen surface sod to a depth of at least 6 inches Apply soil amendments and fertilizers accordmg to planting sod mix proportions and mix thoroughty into top 6 mches of soil Tdl soil to a homogeneous mixture of fine texture 3 4 a Apply fertdizer directly to surface soil before loosening Remove stones larger than I inch m any dimension and sticks roots trash and other extraneous matter Legally dispose of waste matenal including grass vegetation and turf off Owner's property C Fmish Grading Grade planting areas to a smooth uniform surface plane with � loose uniformly fine texture Grade to withm plus or minus 1/2 inch of firnsh elevation Roli and rake remove ridges and fill depressions to meet firnsh grades Limit firnsh grading to areas that can be planted in the immediate future l_ J ' 01517 0219 / Cat Office Budding 02920 5 Lawns and Grasses Caterpdiar Inc October 27 2011 � LAWNS AND GRASSES ' � � E Moisten prepared area before planting if soil is dry Water thoroughly and allow surface to dry before plantmg Do not create muddy soil Before planting obtam Engineer s acceptance of firnsh grading restore planting areas if eroded or otherwise d�sturbed after firnsh grading � 3 2 SEEDING A Do not broadcast or drop seed when wmd velocity exceeds 5 mph Evenly , distr�bute seed by sowing equal quantities in two directions at nght angles to each other po not seed against existing trees Limit extent of seed to outside edge of planting saucer i � � � ' � 33 � ' � ' ' � ' � 34 L3 C Sow seed at a total rate indicated on the drawings Rake seed lightiy into top 1/8 inch of sod roll lightly and water with fine spray D Protect seeded areas with slopes not exceeding 1 6 by spreadmg straw mulch Spread urnformly at a mirnmum rate of 2 tons/acre to form a contmuous blanket 1 1/2 mches �n foose thickness over seeded areas Spread by hand blower or other suitable equipment Anchor straw mulch by crimping into sod with suitable mecharncal eqwpment E Protect seeded areas from hot dry weather or drying winds by applymg compost mulch within 24 hours after completing seedmg opecat�ons Soak areas scatter mulch urnformly to a thickness of 3/16 mch and roll surface smooth TURF MAINTENANCE A Maintain and establish turf by watermg fertdizing weeding mowing trimming replantmg and performmg other operations as required to establish healthy viable turf Roll regrade and repiant bare or eroded areas and �emulch to produce a urnformly smooth turF Provide matenals and �nstallation the same as those used in the original installation B Mow turf as soon as top growth is tall enough to cut Repeat mowmg to maintam height appropr�ate for species without cutting more than 1/3 of grass height Remove no more than 1/3 of grass leaf growth in initial or subsequent mowings C Apply pesticides and other chemical products and biological control agents in accordance with authorities having �urisdiction and manufacturer's written recommendations Coordinate applications with Owners operations and others in prox�mity to the Work Notify Owner before each application is performed SATISFACTORY TURF A Turf installations shall meet the following criteria as determined by Engmeer 01517 0219 / Cat Office Buildmg 02920 6 Lawns and Grasses Caterpillar Inc October 27 2011 � LAWNS AND GRASSES ' 1 Satisfactory Seeded Turf At end of maintenance period a healthy uniform close stand of grass has been established free of weeds and , surFace irregularities with coverage exceeding 95 percent Bare spots shall be scattered and not exceeding 6 by 6 inches m area B Use specified materials to reestablish turf that does not comply with requirements ' and continue mamtenance untd turf is satisfactory ' , ' ' � � � ' ' 1 � � � END OF SECTION 02920 ' 01517 0219 / Cat Office Buddmg 02920 7 Lawns and Grasses , Caterpillar Inc October 27 2011