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HomeMy WebLinkAbout20120076 Ver 1_401 Application_20120112Nut 20076 Soil & Environmental Consultants, PA 11010 Raven Ridge Road Raleigh, North Carolina 27614 Phone (919) 846 -5900 Fax (919) 846 -9467 www SandEC coin f t To US Army Corps of Engineers Raleigh Regulatory Field Office Attn Thomas Brown 3331 Heritage Trade Drive Ste 105 Wake Forest NC 27587 From Nicole Thomson Soil & Environmental Consultants P A 11010 Raven Ridge Road Raleigh NC 27614 g lo il@_ January 27 2012 S &EC Project # 9372 P 1 N C Division of Water Quality WebSCaPe Unit Attn Karen Higgins 512 N Salisbury Street 9`h floor Raleigh NC 27603 i � � � � � � � ii JAN 2 7 2012 Re Unihealth Post Acute Care Rockingham Richmond County NC DENR WATER QUALITY ' ANDIAND STORiAWATER BRANCH On behalf of the Owner Pruitt Properties Inc (Attn Mr Nick Williams) please find attached a complete application and supplemental information requesting written concurrence from the US Army Corps of Engineers ( USACE) and the N C Division of Water Quality (DWQ) that the activities proposed below may proceed under Nationwide Permit (NWP) 39 and General Water Quality Certification (GC) 3821 Please contact meat (919) 846 5900 if you have any questions or require additional information PROJECT SUMMARY Project Name Unihealth Post Acute Care Project Type Institutional /Medical development Owner / Applicant Pruitt Properties County Richmond Nearest Town Rockingham Waterbody Name UT to Hinson Lake Basin / Sub basin 0307 16 Index Number 1339 12 10 Class C USGS Cataloging Unit 03040201 IMPACT SUMMARY Stream Impact (acres) 0 Wetland Impact (acres) 0 07* Open Water Impact (acres) 0 Total Impact to Waters of the U S (acres) 0 07* Total Stream Impact (linear feet) 0 *This impact is to a Jurisdictional Ditch as determined by the USACE Attachments Pre construction Notification (PCN) Application Form Agent Authorization Form USGS Topographic Site Vicinity Map NRCS Soil Survey Site Vicinity Map Signed JD (AiD SAW 2011 00439) Site map (11X17) Impact Map (I I X 17) S &EC Soils Report (DWQ Only) Stormwater Management Plan Calculations (DWQ Only) Signed O &M Agreements (DWQ Only) Stormwater Management Plan Sheets (24X36 DWQ Only) $570 Application Fee (DWQ Only) �2C�WAzf; Q � r O r 20120076 Office Use Only Corps action ID no DWQ project no Form Version 13 Dec 10 2008 Page 1 of 13 PCN Form — Version 1 3 December 10 2008 Version Pre - Construction Notification (PCN) Form A Applicant Information 1 Processing la Type(s) of approval sought from the Corps ®Section 404 Permit El Section 10 Permit lb Specify Nationwide Permit (NWP) number 39 or General Permit (GP) number 1c Has the NWP or GP number been verified by the Corps? ® Yes ❑ No 1d Type(s) of approval sought from the DWQ (check all that apply) ® 401 Water Quality Certification — Regular ❑ Non -404 Jurisdictional General Permit ❑ 401 Water Quality Certification — Express ❑ Riparian Buffer Authorization le Is this notification solely for the record because written approval is not required? For the record only for DWQ 401 Certification ® Yes ❑ No For the record only for Corps Permit ❑ Yes ® No If Is payment into a mitigation bank or in lieu fee program proposed for mitigation of impacts? If so attach the acceptance letter from mitigation bank or in lieu fee program ❑ Yes ® No 1g Is the project located in any of NC s twenty coastal counties If yes answer 1 h below ❑ Yes ® No 1h Is the project located within a NC DCM Area of Environmental Concern (AEC)? ❑ Yes ® No 2 Project Information 2a Name of project Urnhealth Post Acute Care 2b County Richmond 2c Nearest municipality / town Rockingham 2d Subdivision name N/A 2e NCDOT only T I P or state project no N/A Z L5 kL9 n L.1 V Ltm 3 Owner Information JAN 2 7 2012 3a Name(s) on Recorded Deed Pruitt Properties Inc WATERQUAL0 3b Deed Book and Page No 1543 /106 INETLANGa AND STORIAWATER 3c Responsible Party (for LLC if applicable) Pruitt Properties Inc Attn Mr Nick Williams 3d Street address 1626 Jeurgens Court 3e City state zip Norcross GA 30093 3f Telephone no 770 279 6200 3g Fax no 770 925 -4619 3h Email address N/A Page 1 of 13 PCN Form — Version 1 3 December 10 2008 Version 4 Applicant Information (if different from owner) 4a Applicant is ❑ Agent ® Other specify Applicant is the owner as listed on the Agent Authorization please copy agent (S &EC) on all correspondence 4b Name Mr Nick Williams 4c Business name (if applicable) Pruitt Properties Inc 4d Street address 1626 Jeurgens Court 4e City state zip Norcross GA 30093 4f Telephone no 770 279 -6200 4g Fax no 770 925 -4619 4h Email address N/A 5 Agent/Consultant Information (if applicable) 5a Name Nicole J Thomson 5b Business name (if applicable) Soil & Environmental Consultants PA 5c Street address 11010 Raven Ridge Road 5d City state zip Raleigh NC 27614 5e Telephone no (919) 846 5900 5f Fax no (919) 846 9467 5g Email address NThomson @sandec corn Page 2 of 13 B Project Information and Prior Project History 1 Property Identification 1a Property identification no (tax PIN or parcel ID) 747304615223 1b Site coordinates (in decimal degrees) Latitude 34 9296 Longitude 797464 (DD DDDDDD) ( DD DDDDDD) 1c Property size +/ 8 5 acres 2 Surface Waters 2a Name of nearest body of water (stream river etc ) to UT to Hinson Lake proposed project 2b Water Quality Classification of nearest receiving water 13 39 12 (10) C 03 -07 16 2c River basin Yadkin (USGS Cataloging Unit 03040201) 3 Project Description 3a Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this application The surrounding land use includes undeveloped forestland to the north and east some residential parcels to the south and an existing medical complex including the Richmond Memorial Hospital to the west The subject site is currently forested 3b List the total estimated acreage of all existing wetlands on the property None Please note Ms Christy Wicker (USAGE) verified that there exists approximately 3 198 sq ft of jurisdictional ditch (0 07 acres) on the subject property 3c List the total estimated linear feet of all existing streams (intermittent and perennial) on the property 0 3d Explain the purpose of the proposed project The proposed project will be the construction of a 51 bed (36 room) Skilled Nursing Facility The building will be mixed use occupancy with the primary occupancy of Institutional 12 for housing and care of the elderly In addition to housing the facility will include but not be limited to Occupational Therapy Rehabilitation Therapy kitchen and dining commercial laundry and accessory administration spaces 3e Describe the overall project in detail including the type of equipment to be used The project proposes to impact 0 07 acres of jurisdictional ditch for the purposes of budding a post acute care facility and associated parking lot and vehicular access points Heavy equipment associated with this type of development including backhoes dump trucks cement mixers and excavators will be utilized 4 Jurisdictional Determinations 4a Have jurisdictional wetland or stream determinations by the Corps or State been requested or obtained for this property / project (including all prior phases) in the past? ® Yes ❑ No ❑ Unknown Comments USACE issued a signed JD on 3/10/2011 (AID SAW 2011 -00439 attached) 4b If the Corps made the jurisdictional determination what type ❑ Preliminary ® Final of determination was made 4c If yes who delineated the jurisdictional areas? Agency /Consultant Company S &EC PA Name (if known) Mr Steven Ball Other 4d If yes list the dates of the Corps jurisdictional determinations or State determinations and attach documentation See attached signed JD and survey maps AID SAW 2011 00439 Page 3 of 13 PCN Form — Version 1 3 December 10 2008 Version Project Information and Prior Project History 5 Project History 5a Have permits or certifications been requested or obtained for this project (including all prior phases) in the past? ❑ Yes ® No ❑ Unknown 5b If yes explain in detail according to help file instructions 6 Future Project Plans 6a is this a phased project? ❑ Yes ® No 6b If yes explain Page 4 of 13 C Proposed Impacts Inventory 1 Impacts Summary 1a Which sections were completed below for your project (check all that apply) ❑ Wetlands ❑ Streams tributaries ❑ Buffers ® Open Waters ❑ Pond Construction *Please not that Ms Wicker verified that the only jurisdictional waters present on the property is the ditch that exhibits an OHWM (not a modified stream ) 2 Wetland Impacts If there are wetland impacts proposed on the site then complete this question for each wetland area impacted 2a 2b 2c 2d 2e 2f Wetland impact Type of jurisdiction number — Type of impact Type of wetland Forested (Corps 404 10 Area of impact Permanent (P) or (if known) DWQ — non -404 other) (acres) Temporary T W1 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ W2 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ W3 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ W4 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ W5 [:]PMT ❑ Yes ❑ Corps ❑ No ❑ DWQ W6 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ 2g Total wetland impacts 0 2h Comments There are no wetlands on the property 3 Stream Impacts If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site then complete this question for all stream sites impacted 3a 3b 3c 3d 3e 3f 3g Stream impact Type of impact Stream name Perennial Type of jurisdiction Average Impact number (PER) or (Corps 404 10 stream length Permanent (P) or intermittent DWQ — non -404 width (linear Temporary (T) (INT)? other) (feet) feet) S1 ❑ P [--IT ❑ PER ❑ Corps ❑ INT ❑ DWQ S2 ❑ P ❑ T ❑ PER ❑ Corps ❑ INT ❑ DWQ S3 ❑ P ❑ T ❑ PER ❑ Corps ❑ INT ❑ DWQ S4 ❑ P ❑ T ❑ PER ❑ Corps ❑ INT ❑ DWQ S5 ❑ P ❑ T ❑ PER ❑ Corps ❑ INT ❑ DWQ S6 ❑ P [IT ❑ PER ❑ Corps ❑ INT ❑ DWQ 3h Total stream and tributary impacts 0 31 Comments There are no streams on the property Page 5 of 13 PCN Form — Version 1 3 December 10 2008 Version 4 Open Water Impacts If there are proposed impacts to lakes ponds estuaries tributaries sounds the Atlantic Ocean or any other open water of the U S then indiv ually list all open water impacts below 4a Open water impact number — Permanent (P) or Temporary T 4b Name of waterbody (if applicable) 4c Type of impact 4d Waterbody type 4e Area of impact (acres) 01 ®P ❑ T UT to Hinson Lake Fill Jurisdictional Ditch 007 02 ❑P ❑T 03 OP [IT 04 ❑P ❑T 4f Total open water impacts 007 4g Comments Ms Wicker confirmed that the only jurisdictional waters on the subject site is the ditch that exhibits an OHWM (not a modified stream ) 5 Pond or Lake Construction If pond or lake construction proposed then complete the chart below 5a Pond ID number 5b Proposed use or purpose of pond 5c Wetland Impacts (acres) 5d Stream Impacts (feet) 5e Upland (acres) Flooded Filled Excavated Flooded Filled Excavated Flooded P1 P2 5f Total 5g Comments 5h Is a dam high hazard permit required ❑ Yes ❑ No If yes permit ID no 51 Expected pond surface area (acres) 5j Size of pond watershed (acres) 5k Method of construction Page 6 of 13 6 Buffer Impacts (for DWQ) If project will impact a protected riparian buffer then complete the chart below If yes then individually list all buffer impacts below If any impacts require mitigation then you MUST fill out Section D of this form 6a ❑ Neuse ❑ Tar Pamlico ❑ Other Project is in which protected basin? ❑ Catawba ❑ Randleman 6b 6c 6d 6e 6f 6g Buffer impact number — Reason Buffer Zone 1 impact Zone 2 impact Permanent (P) or for Stream name mitigation (square feet) (square feet) Temporary T impact required? 131 ❑ PEI T El Yes ❑ No B2 ❑P ❑T El Yes ❑ No B3 ❑P ❑T ❑Yes ❑ No 6h Total buffer impacts 61 Comments Page 7 of 13 D Impact Justification and Mitigation 1 Avoidance and Minimization 1a Specifically describe measures taken to avoid or minimize the proposed impacts in designing project The subject property is 8 5 acres and is partially bisected by a jurisdictional ditch (0 07 acres) The proposed acute care facility budding will have a total footprint area of 43 743 square feet including areas under roof in addition to the parking facilities and access roads The total site development therefore proposes 3 13 acres of the 8 5 acre site Sufficient room needed to be set aside in order to provide stormwater management devices and controls for compliance with the NC Division of Water Quality stormwater requirements In order to achieve adequate site design budding and parking layout and roadway infrastructure and access points the proposed impacts to the ditch could not be avoided The applicant is also aware of the regional conditions associated with the Nationwide Permits 39 With respect to residential development conditions (Regional Conditions section 4 0) the applicant does not anticipate any impacts to streams or wetlands associated with stormwater facilities there are no proposed single family recreation facilities and there are no permanent wetland or stream fills proposed within the floodway and the stream classification for this project is C (i a not Outstanding Resource Waters or High Quality Waters) 1 b Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques Appropriate Erosion & Sediment Control measures will be utilized including temporary sediment basins and silt fencing to ensure that there is no sediment migration offsite during construction In the area at the southern property line where the wetland line is coincident with the property line orange fabric fencing (or other similar appropriate material) will be used to demarcate the wetland boundary to ensure its protection from impact The Project Engineer will be submitting the appropriate Sediment and Erosion Control Plans to the Division of Land Quality for their review and approval before construction can begin on site 2 Compensatory Mitigation for Impacts to Waters of the U S or Waters of the State 2a Does the project require Compensatory Mitigation for ❑ Yes ® No impacts to Waters of the U S or Waters of the State? 2b If yes mitigation is required by (check all that apply) ❑ DWQ ❑ Corps ❑ Mitigation bank 2c If yes which mitigation option will be used for this El Payment to in lieu fee program project ❑ Permittee Responsible Mitigation 3 Complete if Using a Mitigation Bank 3a Name of Mitigation Bank 3b Credits Purchased (attach receipt and letter) Type Quantity Page 8 of 13 PCN Form — Version 1 3 December 10 2008 Version 3c Comments 4 Complete if Making a Payment to In lieu Fee Program 4a Approval letter from in lieu fee program is attached ❑ Yes 4b Stream mitigation requested linear feet 4c If using stream mitigation stream temperature ❑ warm ❑ cool ❑cold 4d Buffer mitigation requested (DWQ only) square feet 4e Riparian wetland mitigation requested acres 4f Non riparian wetland mitigation requested acres 4g Coastal (tidal) wetland mitigation requested acres 4h Comments 5 Complete if Using a Permittee Responsible Mitigation Plan 5a If using a permittee responsible mitigation plan provide a description of the proposed mitigation plan 6 Buffer Mitigation (State Regulated Riparian Buffer Rules) — required by DWQ 6a Will the project result in an impact within a protected riparian buffer that requires buffer mitigation? ❑ Yes ® No 6b If yes then identify the square feet of impact to each zone of the riparian buffer that requires mitigation Calculate the amount of mitigation required Zone 6c Reason for impact 6d Total impact (square feet) Multiplier 6e Required mitigation (square feet) Zone 1 3 (2 for Catawba) Zone 2 1 5 6f Total buffer mitigation required 6g If buffer mitigation is required discuss what type of mitigation is proposed (e g payment to private mitigation bank permittee responsible riparian buffer restoration payment into an approved in lieu fee fund) 6h Comments Page 9 of 13 E Stormwater Management and Diffuse Flow Plan (required by DWQ) 1 Diffuse Flow Plan 1a Does the project include or is it adjacent to protected riparian buffers identified ❑ Yes ® No within one of the NC Riparian Buffer Protection Rules? lb If yes then is a diffuse flow plan included? If no explain why Comments This project takes place in the Yadkin River Basin which does not have ❑ Yes ® No State regulated riparian buffers Alser no streams exist on the subject site 2 Stormwater Management Plan 2a What is the overall percent imperviousness of this project? +/36% 2b Does this project require a Stormwater Management Plan? ® Yes ❑ No 2c If this project DOES NOT require a Stormwater Management Plan explain why 2d If this project DOES require a Stormwater Management Plan then provide a brief narrative description of the plan The Project Engineer has designed 2 constructed wetlands to treat the stormwater runoff generated by the full build -out of this site Please see the attached Stormwater BMP submittal for DWQ review and approval ❑ Certified Local Government 2e Who will be responsible for the review of the Stormwater Management Plan? ❑ DWQ Stormwater Program ® DWQ 401 Unit 3 Certified Local Government Stormwater Review 3a In which local government s jurisdiction is this project? ❑ Phase II 3b Which of the following locally implemented stormwater management programs ❑ NSW ❑ USMP apply (check all that apply) ❑ Water Supply Watershed ❑ Other 3c Has the approved Stormwater Management Plan with proof of approval been ❑ Yes ❑ No attached? 4 DWQ Stormwater Program Review ❑ Coastal counties ❑ HQW 4a Which of the following state implemented stormwater management programs apply ❑ ORW (check all that apply) ❑ Session Law 2006 246 ❑ Other 4b Has the approved Stormwater Management Plan with proof of approval been attached? ❑ Yes ❑ No 5 DWQ 401 Unit Stormwater Review 5a Does the Stormwater Management Plan meet the appropriate requirements? Please see the attached SMP from Hobbs Upchurch Associates ® Yes ❑ No 5b Have all of the 401 Unit submittal requirements been met? Please see the attached SMP from Hobbs Upchurch Associates ® Yes ❑ No Page 10 of 13 PCN Form — Version 1 3 December 10 2008 Version F Supplementary Information 1 Environmental Documentation (DWQ Requirement) la Does the project involve an expenditure of public (federal /state /local) funds or the ❑ Yes ® No use of public (federal /state) land? lb If you answered yes to the above does the project require preparation of an environmental document pursuant to the requirements of the National or State ❑ Yes ❑ No (North Carolina) Environmental Policy Act (NEPA/SEPA)? 1c If you answered yes to the above has the document review been finalized by the State Clearing House? (If so attach a copy of the NEPA or SEPA final approval letter ) ❑ Yes ❑ No Comments 2 Violations (DWQ Requirement) 2a Is the site in violation of DWQ Wetland Rules (15A NCAC 2H 0500) Isolated Wetland Rules (15A NCAC 2H 1300) DWQ Surface Water or Wetland Standards ❑ Yes ® No or Riparian Buffer Rules (15A NCAC 2B 0200)? 2b Is this an after the fact permit application? ❑ Yes ® No 2c If you answered yes to one or both of the above questions provide an explanation of the violation(s) 3 Cumulative Impacts (DWQ Requirement) 3a Will this project (based on past and reasonably anticipated future impacts) result in ❑ Yes ® No additional development which could impact nearby downstream water quality? 3b If you answered yes to the above submit a qualitative or quantitative cumulative impact analysis in accordance with the most recent DWQ policy If you answered no provide a short narrative description We have reviewed the DRAFT internal Policy Cumulative impacts and the 401 Water Quality Certification and Isolated Wetland Programs document prepared by the NC Division of Water Quality on April 10 2004 version 2 1 The draft states that most small scale commercial projects are unlikely to cause cumulative impacts This project does not meet any of the three criteria of private projects that can clearly result in cumulative impacts This development is relatively small in nature and while it is commercial is within a primarily developed landscape which includes other commercial properties and therefore the utility infrastructure (i a water and electricity) are already in place to service the proposed project We anticipate that you will advise us if a qualitative or quantitative impact analysis is required 4 Sewage Disposal (DWQ Requirement) 4a Clearly detail the ultimate treatment methods and disposition (non discharge or discharge) of wastewater generated from the proposed project or available capacity of the subject facility Wastewater from the project will be disposed of into the municipal sanitary sewer system The municipality will ensure capacity is available at the facility prior to plan approval Page 11 of 13 PCN Form — Version 1 3 December 10 2008 Version 5 Endangered Species and Designated Critical Habitat (Corps Requirement) 5a Will this project occur in or near an area with federally protected species or ❑ Yes ® No habitat? 5b Have you checked with the USFWS concerning Endangered Species Act ❑ Yes ❑ No impacts? 5c If yes indicate the USFWS Field Office you have contacted ❑ Raleigh ❑ Asheville 5d What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical Habitat? The NC Natural Heritage Programs Virtual Workroom was used to search for elemental occurrences of state and federally protected species in the vicinity of the project There were no elemental occurrences of federally threatened or endangered species within 2 miles of the center of the project area 6 Essential Fish Habitat (Corps Requirement) 6a Will this project occur in or near an area designated as essential fish habitat? ❑ Yes ® No 6b What data sources did you use to determine whether your site would impact Essential Fish Habitat? The proposed project is in Richmond County which is not near any coastal or tidal habitat that would support EFH (i a salt marshes oyster reefs etc ) 7 Historic or Prehistoric Cultural Resources (Corps Requirement) 7a Will this project occur in or near an area that the state federal or tribal governments have designated as having historic or cultural preservation ❑ Yes ® No status (e g National Historic Trust designation or properties significant in North Carolina history and archaeology)? 7b What data sources did you use to determine whether your site would impact historic or archeological resources? What data sources did you use to determine whether your site would impact historic or archeological resources? Records checks at the State Historic Preservation Office or the Office of State Archeology were not performed Utilizing Googie Earth and NC National Register Points the Rockingham Historic District is approximately 125 miles from the center of the project No structures were noticed during the wetland evaluation The project is consistent with adjacent land uses 8 Flood Zone Designation (Corps Requirement) 8a Will this project occur in a FEMA- designated 100 year floodplain? ❑ Yes ® No 8b If yes explain how project meets FEMA requirements 8c What source(s) did you use to make the floodplain determination? http / /www ncfloodmaps com/ N1CoLF_ J ` A0M50AI t1Z7l /Z Applica Agents nted Name Date Applica na�Ietter (Agents signature is valid only i nzation m the applicant is provided Page 12 of 13 Environmental Consultants, PA Road Raleigh, North Carolina 27614 Phone (919) 846 -5900 Fax (919) 846 9467 www SandEC com AGENT AUTHORIZATION FORM All Blanks To Be Filled In By The Current Landowner or Municipal Official Name Pruitt Properties, Inc Address 1626 Jeurgens Court Norcross, Georgia 30093 Phone (770) 279 -6200 Project Name/ Description Rockineham Property. S &EC Project # 9372 Date The Department of the Army U S Army Corps of Engineers Wilmington District P O Box 1890 Wilmington NC 28402 Attn 144nh&A 5 5smw&I Field Office Re Wetlands Related Consulting and Permitting To Whom It May Concern I the current landowner or muructnal official, hereby designate and authorize Soil & Environmental Consultants PA to act in my behalf as my agent m the processing of permit applications to furnish upon request supplemental information in support of applications etc from this day forward The 16th day of Augurt This notification supersedes any previous correspondence concerning the agent for tlus project NOTI This auth tion for liabrli ro essional courtesy reasons is valid only for gover jange officials t nter the erty when accompanied by S &EC staff You should call A S &E t a sit prior to visihng the site � �_ J 9-9 -, AA) Pr is sins, r P orporate Development (Sign) r V A A cc Ms Karen Higgins cc Mrs. Nicole Thomson NCDENR DWQ WeBSCAPe Soil & Environmental Consultants PA Archdale Building 512 N Salisbury St "Floor Raleigh, NC 27604 o • rr' � ti � �l1 A � �.• 1`tt 11 TA g 2. ON 2nsan La c r + + S Site = Ct rs4 .. c1 rz I •� +. s C� • a• i • •; s is a Project No. Figure 1 - 1:24K USGS 9372.P1 -Topographic Quadrangl Project Mgr.: Rockingham Property NJT Scale: Richmond County, NC 1" = 1000' 01/27/12 Hamlet Quadrangle 1 WHAM I lip Soil & Environmental Consultants, PA 11010 Raven Ridge Rd.- Raleigh, NC 27614 (919) 846 -5900 - (919) 846 -9467 Web Page: www.SandEC.com 4i jt -A t k 9h, fo -k3: :7,Z- 41 o lr_ ... 4 - 4r (oil j 9110 A_ I Tak OF, ff - lt;I 2F 4'. rl r�'�� U S ARMY CORPS OF ENGINEERS 7 WILMINGTON DISTRICT MAN 1 l jell Action Id SAW 201140439 County Richmond US G S Quad Hamlet f i r Et NOTIFICATION OF JURISDICTIONAL DETERMINATION Property Owner Pruitt Properties Agent Soil and Environmental Consultants, PA Address 1626 Jeurgans Court Attn Steven Ball Norcross GA, 30093 11010 Raven Ridge Road (770) 806.6875 Raleigh, NC 27614 (919) 846 -5900 Property description Size (acres) 663 Nearest Town Rockingham Nearest Waterway UT to Hinson Lake River Basin Yadkin River USGS HUC 03040201 Coordinates N 34 92 %W 79 7464 Location description The oroaerty is located at the end of Physicians Park Circle in Rockingham, Richmond County, North Carolina Parcel ID #'s are 747304609790 and 747304615223 Indicate Which of the Followma Applv A Preliminary Determination Based on preliminary information there may be wetlands on the above described property We strongly suggest you have this property inspected to determine the extent of Department of the Army (DA) jurisdiction To be considered final a ,jurisdictional determination must be verified by the Corps This preliminary determination is not an appealable action under the Regulatory Program Administrative Appeal Process ( Reference 33 CFR Part 33 1) B Approved Determination There are Navigable Waters of the United States within the above described property subject to the permit requirements of Section 10 of the Rivers and Harbors Act and Section 404 of the Clean Water Act Unless there is a change in the law or our published regulations this determination may be relied upon for a period not to exceed five years from the date of this notification X There are waters of the U S including wetlands on the above described property subject to the permit requirements of Section 404 of the Clean Water Act (CWA)(33 USC § 1344) Unless there is a change in the law or our published regulations this determination may be relied upon for a period not to exceed fiv e ) ears from the date of this notification We strongly suggest you have the wetlands on your property delineated Due to the size of your property and or our present workload, the Corps may not be able to accomplish this wetland delineation in a timely manner For a more timely delineation you may wish to obtain a consultant. To be considered final any delineation must be venfied by the Corps The waters of the U S including wetland on your property have been delineated and the delineation has been verified by the Corps We strongly suggest you have this delineation surveyed Upon completion this survey should be reviewed and verified by the Corps Once verified this survey will provide an accurate depiction of all areas subject to CWA ,jurisdiction on )our property which provided there is no change in the law or our published regulations ma) be relied upon for a period not to exceed five y ears X The waters of the U S including wetlands have been delineated and surveyed and are accurate]) depicted on the plat signed by the Corps Regulatory Official identified below on March 10, 2011 Unless there is a change in the law or our published regulations this determination may be relied upon for a period not to exceed five years from the date of this notification There are no waters of the U S to include wetlands present on the above described property which are subject to the permit requirements of Section 404 of the Clean Water Act (33 USC 1344) Unless there is a change in the law or our published regulations this determination may be relied upon for a period not to exceed five years from the date of this notification The property is located in one of the 20 Coastal Counties subject to regulation under the Coastal Area Management Act (LAMA) You should contact the Division of Coastal Management in Morehead City NC at (252) 808 2808 to determine their requirements Placement of dredged or fill material within waters of the US andior wetlands without a Department of the Arm} permit may constitute a violation of Section 301 of the Clean Water Act (33 USC § 1311) If you have any questions regarding this determination and/or the Corps regulatory program please contact Christy Wicker at 910 -251 -4637 C Basis For Determination The site exhibits ordinary high water marks and wetland criteria as defined in the 1987 Wetland Delineation Manual which is abutting an unnamed tnbutary to Hinson Lake. a Traditionally Navigable Water This determination is based on a site visit conducted In Christy Wicker on 12/912010 D Remarks E Attention USDA Program Participants This delmeatron/determ patron has been conducted to identify the limits of Corps Clean Water Adjunsdretron for the particular site identified in this request. The delineation/determination may not be valid for the wetland consenatron provisions of the Food Security Act of 1985 If you or your tenant are USDA Program participants or anticipate participation in USDA programs you should request a certified wetland determination from the local office of the Natural Resources Conservation Service prior to starting work F Appeals Information (This information applies only to approved jurisdictional determinations as indicated in B above) This correspondence constitutes an approted jursdictional determination for the above described site If you object to this determination, you may request an administrative appeal under Corps regulations at 33 CFR part 331 Enclosed you %ill find a Notification of Appeal Process (NAP) fact sheet and request for appeal (RFA) form If you request to appeal this determination you must submit a completed RFA form to the following address District Engineer Wilmington Regulatory Division Ann Ms Christy Wicker Regulatory Specialist, Wilmington Regulatory Field Office 69 Darlington Ave Wilmington North Carolina 28403 In order for an RFA to be accepted by the Corps the Corps must determine that it is complete that it meets the criteria for appeal under 33 CFR part 3315 and that A has been received by the District Office within 60 days of the date of the NAP Should you decide to submit an RFA form it must be recened at the above address by Mai, 10.2011 * *It is not necessary to submit an RFA form to the District Office if 3 ou do not object to the determination in this correspondence ** Corps Regulatory Official _ Date 3 /10/2011 Expiration Date 3110 /2016 The Wilmington District is committed to providing the highest level of support to the public To help us ensure we continue to do so please complete the Customer Satisfaction Survey located at our website at hap. i/regulgM,usacesuM.com, to complete the survey online Copy furnish McNeil Sur eying & Land Planning, PLLC 223 S Hancock Street Rockingham NC 28379 Chad Turlington North Carolina Division of Water Quality 225 Green Street, Suite 714 Fayette,, ille North Carolina 28301 5094 o axe 41ii u ON a� e. --"a* � n WPQ z W 1 O O I Q O O 1 O m 1 z � 1 GPs N C. 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ZOO (OW) d 1 9LWZ69(MO) d 011 NVHMNOOb `OwoSs� s dWe41nDS I LeBASP—BMS006 d` V4 lOddWl HOAG 3WO 31nov 1SOd 6u A nms 1 6uluu Id I 6ulieeul6u �� w saleloossd yoany�dn sggOH Hllb'3HINf1 m .LINO sgso ind M31n3212104 N0110nNISN00 210d lON J J V) = O A No \ \ \ 0 E3 Q a a Q i 0 o. >V) z a RG Y c Zz \000 / i —06Z-_ , \ o \ o CV \ o LO \ \ \ o 0 \\ \ II I w J Q U� p —ORE a° 3z wog 1 I I I I � O¢w I ao3 I I I I I I / I I �I I� / ^P LU z O J�� 17pO�yb S J 0 S 01 o P 3= _������ zo rn N CO U / o� a z cc z ZQ 1 II \ J aJ \I �t �W z3 U Q I w W LLJ o In z C) EN 05, oO ' w� o nN / a- _JN / o th mLL I LL � Q 111 I 00 -- 298 — —r N / I a < Y I 0D U w wz I — co vo 0m o � I II a LU 0 0 0 0 0�c) U 0 zo O aaa a aaa a a 0 aaa a II LO / N N t- P� O — U y a oo CO) N V OLn N OD U 000 O / 0 0 N N O O O O — _ —/J ` I1 M M o I LL LL LL LL LL LL LL LL LL \ LL LLIL LL M l� W foco (0 !n lnco N to to \ Vi0) N o_ m II II OON co7r 6) O MOU)—I` OOP_ C, 00NM a M \ McMh Nt O03 fh NOO M OO M m CD N a f` co OV i1' O \ N M f0 � N z N W co LL \ N LL w cn rCOi 'o v I re �c \ aci CO CO �N - � \ a /U a om / y Q a E �� —J i II II _N / II \ II - °y ♦,w II II 11 m CO) _� _O cc ca M 12 \ ~ a a 02 2 C) a o H c 4) g — — E � x LLI c c E E 2 E v "- c c m E £ E° n0 a E N Lp m ma o II II o o II II o w mQ o II II a o> �aoiv E O 3 0 0 m m Y rn c d> Y n V W � c > �` N p 05 05 E E m O o 4) -> uO m Y o a N a d9m d o o S 0 o_o m o o (L p 0 )000 (L rma a arma a U)00o 0.(0ma a z a o m x \ / / a a 05 3 03 \ 0 0 0 5880 J J 0 = O A w Y 5 w� z 0 rTS z E3 Q a a Q 0 o. >V) z a RG Y c Zz GREGO 2 p / ^P LU z O J�� 17pO�yb S J 0 S 01 o P 3= _������ zo rn N CO U / o� a z cc z ZQ 1 II \ J aJ \I �t �W z3 U Q I w W LLJ o In z C) EN 05, oO ' w� o nN / a- _JN / o th mLL I LL � Q 111 I 00 -- 298 — —r N / I a < Y I 0D U w wz I — co vo 0m o � I II a LU 0 0 0 0 0�c) U 0 zo O aaa a aaa a a 0 aaa a II LO / N N t- P� O — U y a oo CO) N V OLn N OD U 000 O / 0 0 N N O O O O — _ —/J ` I1 M M o I LL LL LL LL LL LL LL LL LL \ LL LLIL LL M l� W foco (0 !n lnco N to to \ Vi0) N o_ m II II OON co7r 6) O MOU)—I` OOP_ C, 00NM a M \ McMh Nt O03 fh NOO M OO M m CD N a f` co OV i1' O \ N M f0 � N z N W co LL \ N LL w cn rCOi 'o v I re �c \ aci CO CO �N - � \ a /U a om / y Q a E �� —J i II II _N / II \ II - °y ♦,w II II 11 m CO) _� _O cc ca M 12 \ ~ a a 02 2 C) a o H c 4) g — — E � x LLI c c E E 2 E v "- c c m E £ E° n0 a E N Lp m ma o II II o o II II o w mQ o II II a o> �aoiv E O 3 0 0 m m Y rn c d> Y n V W � c > �` N p 05 05 E E m O o 4) -> uO m Y o a N a d9m d o o S 0 o_o m o o (L p 0 )000 (L rma a arma a U)00o 0.(0ma a z a o m x \ / / a a 05 3 03 \ 0 0 0 5880 Soil & Environmental Consultants, PA 11010 Raves RWP Road RaImb, Norlh Carolina 27614 ft= (919) 846 -5900 • Fax. (919) 846 -9467 wwwAandEC o mn November 1, 2011 Job # 9372 S1 Pruitt Properties, Inc Attn. Randy Golobish 1626 Jeurgens Court Norcross, GA 30093 Re Detailed soils evaluation for the Rockingham Property proposed Stone Water Retention Ponds, located at the Mallard Lane Extension, Rockingham, Richmond County, NC Dear Mr Golobish Soil & Environmental Consultants, PA (S&EC) performed a detailed soil evaluation within the targeted area of two potential storm water retention ponds on the site mentioned above At the indicated locations the following activities were performed- soil morphology profile descriptions to six feet, measurements of soil hydraulic conductivity (Ksat), and estimations of seasonal high water table. The purpose of this evaluation was to provide additional information for the proper design of the proposed retention ponds, used as BMPs to treat the on -site storm water as per our proposal dated 10/03/11 The following is a brief report of the methods utilized in this evaluation and the results obtained So0/Site Evaluation Methodoloi v The site evaluation was performed by advancing 'hand auger borings to a depth of 6 feet within the proposed storm water retention pond locations The proposed retention pond areas were pre- determined by the client and provided to S&EC (see Attachment 1) Soil morphological conditions were described at each location using standard techniques outlined in the "Field Book for Describing and Sampling Soils" published by the Natural Resources Conservation Service (MRCS, 2002) Sod/Site Conditions This site is located in the Upper Coastal Plain geological area consisting of marine deposits Field investigation revealed that the soils at the specified boring locations are most similar to the Candor and Wakulla soil series Candor and Wakulla soils are somewhat excessively drained soils with a loamy sand to sandy loam subsoil Seasonal High Water Table estimations for each soil boring are shown on Attachment 1 Soil Boring and Ksat Map Hvdrauhe Conductivity Analysis Saturated hydraulic conductivity (Ksat) measurements were conducted at 3 sites by the constant head well permeameter technique (also known as shallow well pump -in technique and bore hole permeameter method) This procedure is descnbed in Methods of Soil Analysis, Part 1 , Chapter 29 — Hydraulic Conductivity of Saturated Soils Field Methods, 29 — 3 2 Shallow Well Pump In Method, pp 758 -763 and in the Soil Science Society of America Journal, Vol 53, no 5, Sept. — Oct 1989, "A Constant head Permeameter for Measuring Saturated Hydraulic Conductivity of the Vadose Zone" and "`Comparison of the Glover Solution with the Sunultaneous — Equations Approach for Measuring Hydraulic Conductivity " In essence, a volume of water was applied and measured with time until a steady state of water flow was achieved This volume/time with steady state was used to calculate the saturated hydraulic conductivity of the subsoil by the Glover equation. S&EC conducted three Ksat measurements, 2 Ksats at the proposed BMP on the west side of the dramage ditch and 1 Ksat on the east side of the ditch. At each site, measurements were made within the 2 foot separation from the seasonal high water table elevation. Ksat values for each site are reported in Table 1 Ksat data calculations/field data are also included in Attachment 2 Based on measurements collected, the tested underlying soli horizons have a geometric mean Ksat value of 7 944 m/hr Table 1 Measured Ksat Values of the Soil Horizons at the Proposed Retention Ponds Location Tatting Depth Soil Texture Soil Horizon Ksat in/hr KSAT #1/ EST BMP 40 LS Bw 8 558 KSAT #4J WEST BMP 24 SL Bw 6 777 KSAT #W EAST BMP 24 LS Bw 8 645 Geometric mean 7944 Soil & Environmental Consultants, PA is pleased to be of service in this matter and we look forward to assisting in the successful completion of the project. If requested, S&EC can meet on -site with NC DWQ to discuss our findings and recommendations Please feel free to call with any questio r is Sincerely, Ricky Pontello NC Licensed Soil INFORMATION Inches cm Date 10127/2011 Measurement Conducted By RP Job Name ROCKINGHAM Job Number 9372.S1 Weather Condition Clear Temperature 55 Location KSAT #11WEST BMP Horizon LOAMY SAND Source of Water Tap 2.00 2.00 Value Units Radius of Hole 2.9 cm Depth of Hole 101.6 Initial DepAh of Water in Hole H 15.24 cm Final Depth of Water irn Hole JHI 15.24 cm Ratio H/r 5.2552 0.4188 Start Saturation Time No of Reservoirs Used at Steady-State A factor in Equation 2 of Manual 0.00105093 i i �CK+M�N i 2 Clock Time Inches cm Hole Depth: 4c` 101.6 H(infdal): 15.24 H(flnal): t 15.24 Clock Time Water Level Reading Time Intervai, Change in Ksat Water Level cm cm /da cm Minute 746 37.0 7.48 319 2.00 5.1 405.20 750 26.3 2.00 5.6 444.92 6.6 524.37 6.5 516.43 5.4 4291 03 7.8 619.71 7.52 7.54 19.7 132 2.00 2.00 7.56 7.8 2.001 7 581 001 2.001 INFORMATION Water Lf�vel Reading Date 10/27/2011 Measurement Conducted By RP Job Name ROCKINGHAM Job Number 9372.S1 Weather Condition Clear Temperature 55 Location KSAT #2/WEST BMP Horror SANDY LOAM Source of Water Tap 812 Value Units Radius of Hole 2.9 cm Depth of Hole 60.96 671 Initial Depth of Water in Hole H) 15.24 cm Final Depth of Water in Hole H 15.24 cm Ratio H/r 5.2552 0.4188 Start Saturation Time No of Reservoirs Used at Steady-State 2 A factor in Equation [21 of Manual 0.00105093 Inches cm Hole Depth: 60.96 H(initial): 15.24 H(frnal): 15.24 Clock Time Water Lf�vel Reading Time Interva Change in Ksat Water Level cm cm /da cm Minute 804 36.5 806 303 2.00 6.2 492.59 5 397.25 4.5 357.53 8.08 25.3 2.00 810 208 2.00 812 163 2.00 4.5 35753 4.1 325.75 814 12.2 2.00 816 671 2.00 5.5 436.98 532.32 818 0.01 2.001 INFORMATION Water Level Readin Date 10/27/2011 Measurement Conducted By RP Job Name ROCKINGHAM Job Number 9372.S1 Weather Condition Clear Temperature 55 Location KSAT #31EAST BMP Horizon LOAMY SAND Source of Water Tap 2.00 Value Units Radius of Hole 2.9 cm Depth of Hole 60.96 73 Initial Depth of Water in Hole H 15.24 cm Final Depth of Water in Hole H 15.24 cm Ratio H/r 5.2552 0.4188 Start Saturation Time No. of Reservoirs Used at Steady-State A factor in Equation [21 of Manual 0.00105093 Inches cm Hole Depth: 60.96 H(initial): 15.24 H(fnal): 15.24 Clock Time Water Level Readin Time Interva Change in Water Level = cm cn� Minute 8.28 322 8.30 25.9 2.00 6.3 6 jj $ 32 10 9 2.00 8.34 13 3 2.00 6.6 6 8 36 7.3 2.00 8 38 0 0 2.00 73 0 Uo w woo,4om4odnsgq04'mMm ggg0- D:j9gwnN8suG011 `dNIl01AVO H12JON 'Wt/HON51002A ZVCL- Z69(016):=l I 9l94Z69(0L6):d X11 `(nIt/HJNI�i�Ob LSESZ sullae0 WON 'sauld waglnoS I laailS PBw9 MS 00E GOW0sauldw941noS d` VY 1OVdINI H011a MJV0-31n0V-iS0d 6ul(8njns I 6uluueld 6uljaaul6ua ffi sajeloOssy yoany�dg sggOH H1IV3HINf1 w .LINO SMOdund M31A3U U0=1 - WuonUISNOO U0=1 lON 7 o CD Lo o / Q / —06E -- ° O 00 CO w o U �- �0 13 I N 0w ° O LLJ I °w o/F- o� v 'o - -- / / I M, / — — — — � -- oo - - � � -- ORQ co / \ U LiJ U � o ° 0m co a / \ U O CO J ?G QQQ Q QQQ Q` Q QQQ Q O II O of y� OOr- ONjN N V OLIN OOD U V y a 0 r 2 coo O� cc- N N coo O w M p / C7 W LL U- U- U)wN LL ui U- U- U- ui CIO m U- co U- co LL U- U- muiN LL co___y C`9 Cl w Y F g p O O N O O I� �O� / O M O le 1- O N M NOCO O Cn O Cl) M \ M CA -IA-f- M -M t- N (a y y N 0) Q ` Z '� N f0 /�f0� N ~ �p \Q_ Z Z d a a V, -O 11N 0) O \ N- Cl) f0 co N * g �v� / A II -w� _ z w 2 �_ Ly y V f0LL \ E CC,jMIl C �.Q` cn Z Q rZ CNO� N / II O �OO�/ II m y Q N O II II II y:.+ II II C7 m y y > °R° Of V a s ° ° 0 ¢ a t E° o G�ENSB >°' > u u\ /qk c u c E -E a 10 vp( 220 i rn iA, u c rn iA �' USN N c c y II CL E O II , a O v c c m j N N E O II E O p ; p 0 E Ncl. ❑ ca ❑'f0 IC O II a,' ' Q C II g a Nom_ 7 U CL W ^� 3❑ N Y y� N 0 j / E p� y@ yOf N y �_ Q O co �ri?U) N@ y lC C °3v(D 4 > `fnCAc L3vCD L w� .y � 2 y � 0 > Lp O m \�' +. c v3oaEi v m'9 mm d o 'o m o oi' c m p o �'j m o o a° O a a 0 O Z J5 e ps%. fA00❑ au)m6- a 5= (L On a H U)00❑ aroma a z. rL 2 CL � o I = _L :7IH,')S =HIVCI :AA M11M \ :H ':IOSSH >i H)HnH -)dn 'SHAOH STORM WATER AND EROSION & SEDIMENTATION CONTROL COMPUTATIONS Prepared for: UNIHEALTH POST -ACUTE CARE ROC�Q , NC �� 0 ''fi Q: •�ESS16 - _ SE . 0 /2 09 Prepared by: HOBBS, UPCHURCH & ASSOCIATES, P.A. 300 S.W. BROAD STREET SOUTHERN PINES, NORTH CAROLINA License #: C -0454 Author: Jarrod E. Hilliard, PE, CFM January 20, 2012 HUA PROJECT #: RK1103 TABLE OF CONTENTS TITLE TOTAL PAGES PROJECT NARRATIVE STORM RAINFALL DATA: NOAA PRECIPITATION DEPTH DATA 4 NOAA PRECIPITATION INTENSITY DATA 4 STORM WATER WETLANDS COMPUTATIONS: WETLAND #1: WETLAND SUPPLEMENT 3 REQUIRED ITEMS CHECKLIST 1 SUPPORTING CALCULATIONS 1 EXISTING SOILS CN 1 BUILT UPON AREA COMPUTATONS 1 COMPOSITE CN / VOLUME COMPUTATIONS 1 DRAWDOWN ORIFICE COMPUTATIONS 1 ANTI- FLOATATION COMPUTATIONS 1 WETLAND #2: WETLAND SUPPLEMENT REQUIRED ITEMS CHECKLIST SUPPORTING CALCULATIONS EXISTING SOILS CN BUILT UPON AREA COMPUTATONS COMPOSITE CN / VOLUME COMPUTATIONS DRAWDOWN ORIFICE COMPUTATIONS ANTIFLOATATION COMPUTATIONS EROSION & SEDIMENTATION CONTROL COMPUTATIONS: SKIMMER/SEDIMENT BASIN COMPUTATIONS 1 SKIMMER SIZING COMPUTATIONS 1 DIVERSION SWALES 11 RIP RAP DISSIPATOR COMPUTATIONS 6 SOILS DATA: NCRS CUSTOM SOILS REPORT 16 MISCELLANEOUS MAPS/DATA: FIRM PANEL 7473 USGS MAP - HAMLET QUAD UNIHEALTH POST -ACUTE CARE STORMWATER MANAGEMENT PROJECT NARRATIVE Purpose of Proiect: The purpose of this project is to construct a post -acute care medical facility including driveways and parking areas, sidewalks in various locations, water system, sewer system, storm water collection system, and storm water treatment system. The total project site for this project is 8.5 acres. A portion of the building in this project will be constructed at a later date. Location: In the City of Rockingham, NC the site is %2 mile north of US Hwy 74 Bypass off of South Long Drive off of Mallard Lane. Existing Terrain/Soils/Hydrology: The project lies within a rolling terrain. Slopes average 5.0% -10.0% across the project. Soils within the project area are mainly Candor and Wakulia type soils. The closest receiving stream is Falling Creek which is part of the Yadkin River Basin. Falling Creek has a stream classification of `C' per the NCDENR -DWQ stream classifications tables. River Basin: The project is located in the Yadkin River Basin Stormwater Requirements: The project is draining to Falling Creek which is classified as "C ", City of Rockingham, Richmond County. Due to jurisdictional ditch impacts, storm water devices will be used on the project. Stormwater Treatment: The project will use two (2) -storm water wetlands for storm water treatment. The wetlands have been sized for the 1" rainfall depth. General Stormwater Notes: All stormwater devices on the project have been designed using the following data: 10 -year design storm, 24 hour storm duration (See NOAA data in Appendix) Tc: 5 minutes STORM RAINFALL DATA Precipitation Frequency Data Server PF tabular http: / /hdsc.nw s. noaa. gov /hdsc /pfds /pfds _printpage.html ?lat = 34.9322 &lo.. NOAA Atlas 14, Volume 2, Version 3 Location name: Rockingham, North Carolina, US* Coordinates: 34.9322, - 79.7462 i Elevation: 276 ft* • source: Google Maps •�+., POINT PRECIPITATION FREQUENCY ESTIMATES G.M Bonnin, D. Martin, B. Lin, T. Parzybok, MYelda, and D. Riley NOAH National Weather Service, Silver Spnng, Maryland PF tabular - PF graphical - Maps & aerials PDS -based point precipitation frequency_ estimates with 90% confidence intervals (in inches)' Duration;��� Average ---- recurrence interval (years) -- 10 [ ( 25 F -501F 100 200 'E 500 1 1000 ! 5 -min 0442 0.523 (0.404-0.484)1(0.478 - 0.574) 0.8508 0.671 0.667) 0.734)1(0.675- 0.745 0.813) 0.798 0.870)!(0.762- 0.847 0.924) 0.893 0.975)!(0.840 0.949 0.991 (0.554- (0.611 - (0.721 - (0.799 - -1.04) (0.871 - 1.08)! Fio--�-J-6-76s-F-o-836 .. 1(0.646-0.773)1(0.764-0.918)1(0.888-1.07) 0.973 1.07 (0.978 - 1.17)1 1.19 (1.08 -1.30) 1.27 ! (1.15 -1.39) 1.35 (1.21 -1.47) ! 1.42 (1.27 - 1.54) 1.50 (1.33 - 1.64)1 1.56 (1.37 - 1.71)- 15 -min 0.882 1.05 0.966) 1.23 136 1.50 ! 1.61 J 1.70 1.79 ! 1.89 1.96 (0.807= (0.961- 1.15), (1.12 - 1.35)- _(1, - 1.49)j (1.36 -1.64) (1.45 -1.75) (1.53 - 1.86) (1 _60 -1.95) (1.67 -2.06) (1.72 -215) j ;[-F 130-min ! 121 1.45 (1.11 -1.32) (1.33 -1.59) 1.75 1.97 -1.92) 2.23 I 2.42 2.61 2.78 I 3.01 i 3.17 (1.60 (1.79 -2.15) 1 (2.02 -2.43) I 1 (2.19 -2.64) 1 (2.34-2.84) 1 (2.49 -3.04) (2.66 -3.29) (2.79 -3.47) j 60 -ruin 1.51 1.82 (1.38 -1.65) (1.67 -2.00) 2.24 IF 2.56 (2.05 -2.46) (2.33 -2.80J ! 2.97 1 (2.69 -3.24) 3.28 17-3-5-971- (297 -3.58) 3.59 (3.23 -3.92) 3.90 (3.49 4.26) 4.31 (3.82 -4.71) 4.63 (4.07 - 5.07) - 1.76 2.14 2.67 IF-3 .08 3.61 4.02 4.44 4.86 5.42 5.86 [�2-hr ! (1.95 -2.36) (1.61 -1.94 C� (2.43 -2.94) i (2.79 -3.39 ) !I (3.26 -3.97 (3.62 -4.42) (3.97 -4.88 ) (4.31 -5.34) ��� (4.76 -5.96) (5.10 -6.46 ! i 3 -hr I 1.87 2.27 (1.71 -2.08) (2.07 -2.52) 2.86 3.31 (2.60_3.16) j (3.00 -3.66) J i 3.93 (3:55 -4.34) 4.43 (3.97-4.89) 4.94 (4.39 -5.44) 5.47 (4.83 -6.02) I 6.21 (5.41-6.83) 6.80 ! 1 1 2.23 IF-2 71 3.40 3.98 4.71 5.33 I 5.96 6.63 7.56 8.31 6 -hr (2.04 -2.47) (2.47 -2.99) (3.10 -3.75) (3.59 -4.36) (4.24 -5.18) (4.76 -5.84) i (5.29 -6.54) 1 (5.83 -7,26) (6.55 -8.27) (7.12 - 9.10)1 - '2.hr ! 2 63 3.19 (2.40 -2.91) (2.91 -3.53) 4.03 4.71 (3.67 -4.45) I (4.27 -5.19) 5.68 I (5.09 -6.22) 6.43 (5.74 -7.06) I 7.25 1 (6.40 -7.94) I 8.11 1 (7.09 -8.88) 9.34 (8.03 -10.2) 10.4 (8.78 -11.3) 3 09 3.73 4.71 5.49 6.58 i 7.46 1 8.38 9.35 10.7 11.8 •. i [��hrj ( 2.85 -3.35) � (3.44 -4.06) (4.34 -5.12) 1 (5.04 -5.96) (6.02 -7.14) - (6.80_8.10) (7.61 -9.10) (8.45 -10.2) (9.61 -11.7) (10.5 -12.9) 2 -day 1 3.62 4.36 (3.35 -3.91) (4.04 -4.71) 5.46 6.34 (5.05 -5.91) j (5.85 -6.86 ) IF 7.57 ! 696 -8.18 !�) ( ) ! 8.56 (7.84 -9.26 9.59 (8.75 -10.4) � ���� 10.7 (9.69 -11.6 12.2 11.0 -13.3) 13.4 (12.0 -14.7 _� 3.84 4.62 5.75 6.66 ! 7.92 8 93 9.99 11.1 12.7 ! 13.9 3 (3.57 -4.13) (4.29 -4.97) (5.34 -6.19) (6.17 -7.17) (7.31 -8.52) (8.21 -9.62) (9.15 -10.8) (10.1 - 12.0) , (11.5 - 13.7)1 (12.5-15.1) - 4.06 4.87 6.04 6.97 8.26 9.31 I 10.4 11.5 13.1 14.4 4-day (3.78 -4.36) (4.55 -5.23) „ (5.62 -6.47) (6.48 -7.47) (7.66 -8.87) (8.59 -9.98) (9.56 -11.2) (10.6 -12.4) (11.9 - 14.2)1 (13.0 -15.6) 'F7 4.88 5.57 6.81 1 7.81 ! 9.18 ! 10.3 11.4 12.6 14.2 15.6 day I (4.36 -4.98) (5.21 -5.95) (6.37 -7.28) (7.29 -8.34) (8.54 -9.81) (9.54 -11.0) (10.5 -12.2) (11.6 -13.5) I (13.0- 15.3)j (14.2 -16,8)1 �ayJ 5.33 6.35 7.66 JI 8.69 10.1 ! 11.2 12.3 ! 13.5 ( 15.0 16.3 (5.03 -5.67) (5.98 -6.75) (7.21 -8.13) t (8.17 -9.22) (9.46 -10.7) (10.5 -11.9) 3 I (13.5 -15.2) I (11.5 -13.1) 15.7 1 (14.7 -16.6) (12.5 -14.3) 17.0 1 (15.9 -18.1 ) (13.9 - 16.1)1 i 18.9 1(17.5 -20.1) (15.0 - 17.4); 20.4 j (18.8.21.7)- 20 -day � 7.19 I =8%) (6.80 -7.61) j 10.1 ! 11.3 (9.53 -10.7) (10.7 -12.0) 13.0 IF-14 1 (12.3 -13.8) 11 30 8'88 10.5 12.2 13.6 15.3 16.7 18.1 19.4 21.3 22.7 -day (8.41 -9.39) (9.91 -11.1) (11.5.12.9) (12.8 -14.3) (14.5 -16.2) (15.7 -17.7) (17.0 -19.1) (18.2 -20.6) i 1(19.8-22.6)11(21.1-'24.2) ! 45 -day 11.3 13.2 (10.7 -11.9) (12.5 -13.9) 15.2 16.7 E 4.4 -16.0) (15.8 -17.6) 18.6 - (17.6 -19.6) 20.1 (19.0 -21.2) 21.5 (20.3 -22.7) ( 23.0 (21.6 -24.3) - 24.8 j (23.3 - 26.3)1 26.3 (24.5 - 27.9) 60 -day ! 13.5 15.8 (12.8.14.2) (15.0 -16.6) 17. 19.6 I (17.0 -18.9) (18.6 -20.6) 21.7 i (20.5 -22.8) 23.3 (22.0 -24.5) 24.8 ( (23.4 -26.2) I 26.4 (24.8 -27.8) 28.3 ; (26.6 -30.0) - 29.8 - (27.9 - 31.6); Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS). j Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for; a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5 %. Estimates at upper bounds are not, checked against probable maArnum precipitation (PMP) estimates and may be higher than currently valid PMP values. ! Please refer to NOAA Atlas 14 document for more information. Back to Top PF graphical 1 of 4 12/19/2011 12:04 PM Precipitation Frequency Data Server 30 25 r- = 20 c a C 15 ro 'a 5 10 Iv Q. 5 0 http: / /hdsc.nws.noaa. gov /hdsc /pfds /pfds _printpage.htzA ?lat = 34.9322 &lo.. PDS -based depth- duration- frequency (DDF) curves Coordinates: 34.9322, - 79.7462 c G G C c L 15-rnln M M M. M. M M. M Mrs E E � i= N IJ1 11i � -O •O 'p ti � -O -O y -O u1 O A O O O O r%1 Duration d 30 25 c •C 20 a+ a a v 0 15 re a u 10 5 0 1 2 5 10 25 50 100 200 500 1000 Average recurrence interval (years) NOAA/NWS /OHD /HDSC Created (GMT) Mon Dec 19 17:05.412011 Back to Top Maps & aerials Small scale terrain -P -j -� r ;Memnsvnen Dariville 4 , : r Roenu+<e a MI a n 0 P.epi rngspon � ffE e'bi CEdM d thrw:' ' �""' S, CRcCSV le O � Anoe►re Johnson .: Her�ersan c Greensboro ,10 ".,Coy wine t)n•SalemA� Eden ?v Hlg Point Durham RorkyMt ° a a-.�Tafber0 K'lymoutn. *Y 1 9r r ?w• er. ^g: n[• R &,sigh c es re North Xt P stat o O'Mison Hleko sllevklhrp[ ew ry 9581-04Y Carolina Ape= CCirotrmlle Hur}lslwrle. Q u &mohttra n Y•uer. "p : *C!cord Sanford �Gastonia ton 5helbyo -Nrn Goldsboro a Charlotte FayettevOle 0B`f" �r y Spartanburg pQ o, Greenville `.4 Merlin!. - +r1f� Httvxiw+o Wel6yA . �8mp�vrr :lie . Rdtk NiH:. o Nrwpona LP" an Jaakaomdle Moferaad oly gRdetYOn 166 I ° , l Fio ne tturi r le w.ij• r� ° Map data' 02011 Google - Terrnsofuse Average recurrence nterval (yea ) 1 2 5 10 25 50 -- 100 200 500 1000 Duration 5-mtn — 2-day t0-mIn 3-day 15-rnln -- 4-day 30-mtn — 7•4ay — 60irdn — 10-0ay 2-hr — 20-day w-- 3-hr — 30-day — 6-hr — 45-day - 12-hr — 130 -day 24-hr 2 of 12/19/2011 12:04 PM Precipitation Frequency Data Server Large scale terrain o ? Large scale map `D 8 Richman I Country Rockingham �zo � /% O 74 East Rockingham Dobbins 7n Heights 2 km 2 mi Map data 02011 Google - Terms of Use Back to Too 3 of 4 http: //hdsc.nw s.noaa. gov /hdse /pfds /pfds _printpage.httA ?Iat= 34.9322 &lo.. 12/19/2011 12:04 PM Rio/hMitry 6a 4 4 wY,Y Rockingham a a bMy j Gountyr� _ ;4 Rv East Rockingham Dobbins 74 Heights $ 2-km I Ar j,.2 mi Richal Map data 02011 Google - Terms of Use Large scale map `D 8 Richman I Country Rockingham �zo � /% O 74 East Rockingham Dobbins 7n Heights 2 km 2 mi Map data 02011 Google - Terms of Use Back to Too 3 of 4 http: //hdsc.nw s.noaa. gov /hdse /pfds /pfds _printpage.httA ?Iat= 34.9322 &lo.. 12/19/2011 12:04 PM Precipitation Frequency Data Server http:// hdsc. nws. noaa. gov /hdsc /pfds /pfds _printpage.htnil ?lat = 34.9322 &lo.. US Department of Commerce National Oceanic and Atmospheric Administration National Weather Service Office of Hydrologic Development 1325 East West Highway Silver Spring, MD 20910 Questions ?: HDSC.Questionsonoaa.gov ier 4 of 4 12/19/2011 12:04 PM Precipitation Frequency Data Server PF tabular http: //hds c. nw s. noaa. gov /hdsc /pfds /pfds _printpage. htn A? 1 at =34.93 22 &l o.. NOAA Atlas 14, Volume 2, Version 3 Location name: Rockingham, North Carolina, US" Coordinates: 34.9322, - 79.7462 @ * Elevation: 276 ft source: Google Maps �. POINT PRECIPITATION FREQUENCY ESTIMATES G.M. Bonnet, D. Martin, B. Lin, T. Parzybok, M.Yekta, and D. Riley NOAH National Weather Service, Silver Spring, Maryland PF tabular I PF graphical I Maps & aerials i PDS -based point precipitation frequency estimates with 90 % confidence! ntervals (in inches /hour Duration Average recurrence interval (years) j 25 J 50 100 j _ 200 _ 500 1000 5.30 1F 6.28 7.30 1 8.05 IF 8.94 F 9.58 10.2 I 10.7 11.4 11.9 5 -min I�(4.85-5.81) I (5.74-6.89) i (6.65-8.00) (7.33-8.81) (8.10-9.76) I (8.65 10;4 (9.59-11.7) i (10.1 -12.4) (10.5 -13.0) El 4.23 5.02 ' 5.84 6.44 7.12 7.63 8.08 8.50 ! 9.01 I -min (3.88 -4.64) (4.58 5.51) (5.33 -6.41) (5.87 -7.04) (6.46 -7.78) j (6_89 -8.32) (7.26 8.81) I (7.60 -9.27) j (7.97 -9.84 15 -min 3 53 4.20 IF 5.43 6.02 6.44 6.81 7.14 7.56 1 R(6.89-8.58) (3.23 -3.86) (3.84 -4.61) ! (4.49 -5.40 (4.94 - 5.94) (5.46-6.57) (5.82 -7.02 (6.12-7.43) (6.39-7,80) (6.69 -8.26J 1 (' �! ' 2.42 IF 2.90 IF 3.50 3.93 4.46 4.85 5.21 5.56 j 6.01 1 6.34 30 -min (2 21 -2 65) j (2.65 -3.19) (3.19 -3.84) (3.58 -4.30) (4.04 -4.87) (4.38 -5.29J (4.69 -5.69) (4.97 -6.07) (5.32 -6.57) (5.58 -6.95) 60 -min 1.51 1.82 2.24 I 2.56 2.97 j 3.28 3.59 3.90 I 4.31 4.63 ; (2.69 -3.24) 2 (2.97 -3.8) 3.23 3.92) (3.49 -4.26) .82 - 4.71) 4-PL-5-07)j 2 32 ; 0.880 1.07 133 1.54 1.80 2.01 j 2.22 2.43 2.93 2 -hr ((0.804 - 0.972)1 (0.974 - 1.18)1 (1.22 -1.47) (1.40 -1.69) (1.63 -1.99) (1.81 -2.21) I (1.98 -2.44) (2.15 2.67) (2.55 3.23) =(2.382 ! 1 48 1.64 1.82 2.07 2.27 I� -��3 3 -hr (0.569 0 692)1(0.690- 0.839) (0.8655105) (1.00'1022) (1. 83145 J �� ) i (1.32 -1.63) (1.46 -1.81) (1.61 -2.00) (1.80 -2.28) (1.95 -2.50) 6 0.373 0.452 0.568 0.660 0.787 j 0.890 0.996 1.11 i 1.26 1.39 (0 .340- 0.412) (0.412. 0.499) (0.517 - 0.627) (0.599- 0.728) (0_709 - 0.865)1(0.795- 0.976_) (0.884- 1.09)1 (0.973 - 1.21) (1.09 -1.38) (1.19_1.52) 12-hr 0.218 0.265 0.335 0.391 0.469 0.534 0.602 I 0.673 0.775 0.859 (0. 199-0.241)1(0.241-0.293)1(0.304-0.370)1(0.354-0 ] 1 .431) (0. 422 - 0.516) .476 -0.5(0.531-0.659)1(0.588-0.737)1(0.667-0.848) (0.729- 0.939) =0.129 24-hr 0.156 I 0.196 0.229 0.274 0.311 F 0.349 0.390 0.446 0.492 (0.119- 0.140) (0.143 - 0.169)1(0.181- 0.213) (0.210- 0.249) (0. 251 -0. 298 )1(0.283 0.338) (0_317- 0.379) (0.352 - 0.423) (0.400 - 0.486)1(0.439- 0.537) 0.075 IF 0.091 IF 0.114 IF 0.132 IF 0.158 IF 0.178 IF 0.200 IF 0.222 0.254 1 0.280 2 -de 1�1(0.070-0.081)]1(0.084-0.098)1(0.105-0.123) (0.122 - 0.143) (0.145 - 0.170)1(0.163- 0.1931) (0.182 - 0.216) (0.202 - 0.241) (0.229- 0.276) (0.250 - 0.305) 3 -day 1(0.050- 0.053 0.064 0.080 0.092 0.110 1 0.124 0.139 0.154 0.176 0.193 0.057)'(0.060- 0.069) (0.074-0.086) (0.086 -0. 100) (0.101- 0.118)I(o.114- o.13a) (0. 127 0.150)I(o.14;10.167)I(o.159- 0.191) (0.174- 0.21o)j I 4 -da 0.042 :, 0.051 0.063 0.073 0.086 0.097 0.108 0.120 1 0.137 0.150 (0.039 - 0.045) (oA47- 0.054) (0.059 - 0.067) (0.068 - 0.078) (0.080 - 0.092) (0_090- 0.104) (0.100 - 0.116) (0.110 - 0.129) (0.124 - 0.148) (0.136 - 0.163), 7 -da 0.028 + 0.033 0.041 0.046 0.055 0.061 1 0.068 I 0.075 j 0.085 0.093 !� (0.026 - 0.030) (0.031-0.035) (0.038- 0.043) (0.043 - 0.050) (0.051 - 0.058) (0.057- 0.065) (0.063 - 0.073) (0.069 - 0.080) (0.077 - 0.091)'(0.084- 0.100) 10 -de I 0.022 0.026 0.032 0.036 0.042 0.047 0.051 0.056 0.063 0.068 (0. 021 - 0.024)!(0.025 - 0.028)1(0.030- 0.034) (0.034 - 0.038) (0.039- 0.045) (0.044- 0.050) (0.048 - 0.055) (0.052- 0.0691) (0.058- 0.(67) (0.062- 0.073) 20 -day 10.015 0.018 0.021 0.024 0.027 0.030 0.033 0.036 ! 0.039 0.042 (0.014 - 0.016)x(0.017- 0.019) (0.020 - 0.022)1(0.022- 0.025) (0.026 0.029) (0.028- 0.032) [(0.031-0.035) (0.033 - 0.038)1(0.037- 0.042) (0.039 - 0.045) 30-day '(0.012- 0.012 0.015 0.017 0.019 0.021 I 0.023 0.025 0.027 0.030 0.031 0.013) (0.014 - 0.015)1(0.016- 0.018) (0.018- 0.020) (0.020 0.022) (0.00.023 25)](0.024- 0.027) (0.025 - 0.029)!(0.028- 0.031) (0.029 - 0.034) 4 0.010 0.012 I 0.014 0.015 0.017 I 0.019 1 0.020 0.021 0.023 0.024 (0.010 - 0.011)!(0.012- 0.013) (0.013 - 0.015) (0.015 - 0.016) (0.016 - 0.018)x(0.018- 0.020) (0.019 - 0.021) (0. 020 -0. 022 )1(0.022- 0.024)1(0.023- 0.026) 60 -da .� 0 009 0.011 0.012 0.014 0.015 0.016 0.017 0.018 0.020 0.021 (0.009- 0.010) (0.010 - 0.012)1(0.012- 0.013) (0.013 - 0.014) (0.014 - 0.016)1(0.015- 0.017) (0.016 - 0.018) (0.017 - 0.019) (0.018- 0.021) (0.019 - 0.022) Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS). 1 Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5 %. Estimates at upper bounds are not checked against probable ma)dmum precipitation (PMP) estimates and may be higher than currently valid PMP values. Please refer to NOAA Atlas 14 document for more information. Back to Top PF graphical 1 of 4 12/19/2011 12:06 PM Precipitation Frequency Data Server 100.000 10.000 L C C 1.000 C ° 0.100 M c. v er 0. 0.010 0.001 L S E A 100.000 r 10.000 c 1.000 a c e 'ZI 0.100 M a CL 0.010 0.001 http: // hdsc. nws. noaa. gov /hdsc /pfds /pfds _printpage.htn -A ?i at= 34.9322 &lo.. PDS -based intensity- duration - frequency (IDF) curves Coordinates: 34.9322, - 79.7462 ........... ... ... .......1. E A E E r:I ni u5 r:I a 'OD -Y 'v -Y v v pN v p ri N pp LA l0 � IO t00 N � f\ O N 11� LA 1 2 5 10 25 50 100 200 500 1000 Average recurrence interval (years) NOAA/NWS /OHD/HD5C Created (GMT) Mon Dec 19 17:08:312011 Back to Top Maps & aerials Small scale terrain _ Msmrmvlue,; Danwile w Roanoke ..' GEd n Replde t1E:!uatiah!an' +•Y OReldsw -le Ahoskie yenderwn ° Jo 'risal . . ° Greensboro Edensa o. • Buone C-118 )h',.- r , �.. Wmstvn•Seiem¢ �., � r4eno:r Durhamv RoskyMt n Mlgh Point 0: Plyma�tn `;,v; gpztu ��xrgra-b North Raleigh .. iTarooro o. tz statet" •e aWi180n l a Hickory Ys &al +bury C a r 01 l+n a Ape: .c °a ry I'I?" { aC3resnw!ie p�` r •A Hunie.•.r.ie � 9SmrthTlew Gas Inla ' Alekr"rd sans p x SW CVO Q'Ihan Gold8b0f0 Che Oti @. Fayetteville New�Eem T Spertarburgf Q ' Greewfle '0 t7 Mxt mot •••• Have(*;* Rrk Hi!! �' y He vrNxt a w Irt I \Lum4ex Map data =11 Google - Terms of Use Average recurrence Interval (years) 2 5 — 10 - 25 -- 50 100 — 200 500 1000 Duration 6-min --- 2-day --- 10-min 3-day I6-min 4-day — 30-min --- 7-day — 60-min — 10-day -- 24ir — 20-day — 3-hr — 30-day -- 6-hr — 45-day — 12-hr — 60-day 24•hr 2 of4 12/19/2011 12:06 PM Precipitation Frequency Data Server Large scale terrain x o 0 i t iO t Rich O—try t•y' F Rockinghem 220 � 1.� 74 v y East Rockingham Doohtns �q Heights ct 7 j 2 km 1 4f y ' 1 2 nd Ri&.1 ktp data 02011 Google - Terms of Use Large scale map Rd is r RiCnloo F6i. ii, • .V y Rockingham , �.J Cnuniyy{p� East Rockingham A �. Dote 74 Heights ;- �x 4' 2 n-J R,c k Map data 02011 Google - Terms of Use 3 of 4 http: / /hdsc.nw s. noaa. gov /hdsc /pfds /pfds _printpage.html ?Iat = 34.9322 &lo.. 12/19/2011 12:06 PM Precipitation Frequency Data Server Back to Top US Department of Commerce National Oceanic and Atmospheric Administration National Weather Service Office of Hydrologic Development 1325 East West Highway Silver Spring, MD 20910 Questions ?: HDSC.Questions(a)noaa.gov Disclaimer http: /'hdsc.nws.noaa.gov /hdsc /pfds /pfds _printpage.html ?lat = 34.9322 &lo.. 4 of 12/19/2011 12:06 PM STORM WATER WETLANDS COMPUTATIONS WETLAND #1 OF W A TFR C� pG HCDENR Y STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WETLAND SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all the required information. 1. PROJECT INFORMATION AWL Project name Uni -Health Post -Acute Care Contact name Jarrod E. Hilliard, PE, CFM Phone number 910 - 692 -5616 Date December, 2011 Drainage area number 1 II. DESIGN INFORMATION - Site Characteristics Drainage area 313,212.00 ftz Impervious area 106,330.00 ftz Percent impervious 33.9% % Design rainfall depth 1.00 inch Peak Flow Calculations ft3 1 -yr, 24 -hr rainfall depth 3.09 in 1 -yr, 24 -hr intensity 0.13 in /hr Pre - development 1 -yr, 24 -hr runoff 0.29 ft3 /sec Post - development 1 -yr, 24 -hr runoff 0.47 ft3 /sec Pre /Post 1 -yr, 24 -hr peak control 0.18 ft3 /sec Storage Volume: Non -SA Waters Minimum required volume 9,279.80 ft3 Volume provided (temporary pool volume) 9,326.50 ft3 OK Storage Volume: SA Waters Parameters 1.5" runoff volume ft3 Pre - development 1 -yr, 24 -hr runoff volume ft3 Post - development 1 -yr, 24 -hr runoff volume ft3 Minimum volume required ft3 Volume provided ft3 Outlet Design Depth of temporary pool /ponding depth (Dnwt) 12.00 in OK Drawdown time 3.59 days OK Diameter of orifice 1.50 in Drawdown orifice diameter may be insufficient. Please provide adequate supporting calculations. Coefficient of discharge (CD) used in orifice diameter 0.60 (unitless) calculation Driving head (Ha) used in the orifice diameter calculation 1.00 ft OK Form SW401- Wetland- Rev.6- 11/16/09 Parts I and ll. Project Design Summary, Page 1 of 3 Surface Areas of Wetland Zones Surface Area of Entire Wetland Shallow Land The shallow land percentage is: Shallow Water The shallow water percentage is: Deep Pool Forebay portion of deep pool (pretreatment) The forebay surface area percentage is: Non - forebay portion of deep pool The non- forebay deep pool surface area percentage is: Total of wetland zone areas Add or subtract the following area from the zones Topographic Zone Elevations Temporary Pool Elevation (TPE) Shallow Land (top) Permanent Pool Elevation (PPE) Shallow Water /Deep Pool (top) Shallow Water bottom Most shallow point of deep pool's bottom Deepest point of deep pool's bottom Design must meet one of the following two options: This design meets Option #1, Top of PPE is within 6" of SHWT, If yes: SHWT (Seasonally High Water Table) This design meets Option #2, Wetland has liner with permeability < 0.01 in /hr, If yes: Depth of topsoil above impermeable liner Topographic Zone Depths Temporary Pool Shallow Land Permanent Pool Shallow Water Deep Pool (shallowest) Deep Pool (deepest) Planting Plan Are cattails included in the planting plan? Number of Plants recommended in Shallow Water Area: Herbaceous Wcubic -inch container) Number of Plants recommended in Shallow Land Area: Herbaceous Wcubic -inch container), OR Shrubs (1 gallon or larger), OR Trees (3 gallon or larger) and Herbaceous (4+ cubic -inch) Number of Plants provided in Shallow Water Area: Herbaceous (4'cubic -inch container) Number of Plants provided in Shallow Land Area: Herbaceous Wcubic -inch container) Shrubs (1 gallon or larger) Trees (3 gallon or larger) and Grass -like Herbaceous (4+ cubic -inch) 9,326.50 ftz OK 3,775.56 ftz Insufficient shallow land area. 40%% 3,691.40 ftz OK 40%% 942.22 ftz OK 10%% 917.32 ftz OK 10%% 9,326.50 ftz OK 0.00 ftz 269.00 ft amsl 268.00 ft amsl 267.70 ft amsl 265.00 ft amsl 265.00 ft amsl Y (Y or N) 268.30 ft amsl OK (Y or N) 4.00 in OK 12.00 in OK 3.60 in OK 36.00 in OK 36.00 in OK N (Y or N) OK 950 950 152 19 and 760 Form SW401- Wetland- Rev.6- 11/16/09 Parts I and 11. Project Design Summary, Page 2 of 3 Additional Information Can the design volume be contained? Y (Y or N) OK Does project drain to SA waters? If yes, N (Y or N) Excess volume must pass through filter. What is the length of the vegetated filter? ft Are calculations for supporting the design volume provided in the Y (Y or N) OK application? Is BMP sized to handle all runoff from ultimate build -out? Y (Y or N) OK Is the BMP located in a recorded drainage easement with a Y (Y or N) OK recorded access easement to a public Right of Way (ROW)? The length to width ratio is: 5.06 :1 OK Approximate wetland length 324.00 ft Approximate wetland width 64.00 ft Approximate surface area using length and width provided 20,736.00 ft o This approx. surface area is within this number of square feet f the entire wetland surface area reported above: Will the wetland be stabilized within 14 days of construction? Y (Y or N) OK Pone SW401- Wetland- Rev.6- 11/16/09 Parts I and II. Project Design Summary, Page 3 of 3 Permit No. (to be provided by DWQ) III. REQUIRED ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Initials X6-14 JC -K Pagel Plan Sheet No. -o C-oS P-00 6-057 600 .P-0(O C-D C-o?, �p2 bo D -0(p DI-?D4 C -o Plans (1" - 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Wetland dimensions (and length to width ratio), - Pretreatment system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Overflow device, and - Boundaries of drainage easement. Plan details (1" = 50' or larger) for the wetland showing: - Wetland dimensions (and length to width ratio) - Pretreatment system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Design at ultimate build -out, - Off -site drainage (if applicable), - Overflow device, and - Boundaries of drainage easement. 3. Section view of the wetland 0 " = 20' or larger) showing: - Side slopes, 3:1 or lower - Wetland layers All wetlands: Shallow land depth, shallow water depth, deep pool depth Option 1, no clay liner: SLWT depth Option 2, clay liner: Depth of topsoil on top of liner, liner specifications 4. A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing: - A variety of several suitable species (not including cattails), - Sizes, spacing and locations of plantings, - Total quantity of each type of plant specified, - A planting detail, - The source nursery for the plants, and - Fertilizer and watering requirements to establish vegetation. 5. A construction sequence that shows how the wetland will be protected from sediment until the entire drainage area is stabilized. 6. The supporting calculations (including drawdown calculations). 7. A copy of the signed and notarized operation and maintenance (0 &M) agreement. 8. A copy of the deed restrictions (if required). 9. A soils report that is based upon an actual field investigation and soil borings. County soil maps are not an acceptable source of soils information. SW401- Wetland- Rev.6- 11/16/09 Part III, page 1 of 1 ktoned Plans (1" - 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Wetland dimensions (and length to width ratio), - Pretreatment system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Overflow device, and - Boundaries of drainage easement. Plan details (1" = 50' or larger) for the wetland showing: - Wetland dimensions (and length to width ratio) - Pretreatment system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Design at ultimate build -out, - Off -site drainage (if applicable), - Overflow device, and - Boundaries of drainage easement. 3. Section view of the wetland 0 " = 20' or larger) showing: - Side slopes, 3:1 or lower - Wetland layers All wetlands: Shallow land depth, shallow water depth, deep pool depth Option 1, no clay liner: SLWT depth Option 2, clay liner: Depth of topsoil on top of liner, liner specifications 4. A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing: - A variety of several suitable species (not including cattails), - Sizes, spacing and locations of plantings, - Total quantity of each type of plant specified, - A planting detail, - The source nursery for the plants, and - Fertilizer and watering requirements to establish vegetation. 5. A construction sequence that shows how the wetland will be protected from sediment until the entire drainage area is stabilized. 6. The supporting calculations (including drawdown calculations). 7. A copy of the signed and notarized operation and maintenance (0 &M) agreement. 8. A copy of the deed restrictions (if required). 9. A soils report that is based upon an actual field investigation and soil borings. County soil maps are not an acceptable source of soils information. SW401- Wetland- Rev.6- 11/16/09 Part III, page 1 of 1 Wetlands Area Supporting Calculations Area - #1 Peak Inflow Calculations Drainage Area A 313,212 sf 7.19 Acres Pre-development Impervious Area 7,381 sf 0.17 Acres Post-development Impervious Area 98,949 sf 2.27 Acres -n ervious vercenta a 2.361/10 Impervious Percentage 33.95% Includes Pre - development Pre-development Run -off Coefficient C 0.31 Post- development Run-off Coefficient C 0.50 Rainfall Depth Rd 1.00 1 vr, 24 hr rainfall intensity ( I 1 0.13 in /hr e- Cevelopment 1 -yr, 24 -nr peaK flow (Q) = C *I *A Q = 0.29 cfs Est- development 1 -yr, 24 -hr peak flow (Q) = C *I *A Q = 0.47 cfs ors a Volumes: Non SR Waters Calculations _ .05 +.9 *(impervious (ac) /DA (ac)) R = 0.356 me required = 3630 * Rd * Rv * A V=1 9,279.80 cf Basin Structure Calculations Total Surface Area at PPE 1 9,326.50 sf Surface Area of Shallow Land 3,775.56 sf Surface Area of Shallow Land - Perceta a 40.48% Surface Area of Shallow Water 3,691.40 sf Surface Area of Shallow Water - Perceta a 39.58% Surface Area of Forebay 942.22 sf Surface Area of Forebav - Percetage 10.10% 917.23 sf Suitable Suitable !Surface Area of Deer) Pool Cutlet - Percetaae I 9.83% 1 Suitable I Project Name Pre - Development Curve Numbers Date Uni- Health Post -Acute Care for Design Dec., 2011 Stormwater Wetlands #1 HUA Project No. Location N Hobbs Upchurch Associates RK1103 ki Rocngham, engineering I planning I surveying Calculated By North Carolina 800.849.1861 . www.hobbsupchurch.com FDW Charlotte . Wilmington . Nags Head . Southern Pines Checked By SUPERIOR PERFORMANCE THROUGH INNOVATIVE DESIGN TKG 4 Project consists of the following Soil Groups: Soil Type Name Grade CN for Grade Percent Soil CaC Candor and Wakulla A 69 95% AcB Wagram B 49 5% Compost Pre - Development: (soil type 1 % X CN) +(soil type 2 % X CN) = Pre - Development CN USE Pre - Development CN: 68 Project Name Built Upon Area Date UniHealth Post -Acute Care Computations Dec., 2011 Stormwater Wetlands #1 HUA Project No. Location �� Hobbs Upchurch Associates RK1103 Rockingham engineering I planning I surveying Calculated B North Carolina 800.849.1861 . www.hobbsupchurch.com FDW Charlotte . Wilmington . Nags Head . Southern Pines Checked By SUPERIOR PERFORMANCE THROUGH INNOVATIVE DESIGN TKG Impervious Areas: Pre - development Post - development Sidewalks: 409 Sq. Ft. 0.01 Acres Buildings: 2,000 Sq. Ft. 0.05 Acres Pavement/Curb: 4,972 Sq. Ft. 0.11 Acres Post - development Total Built Upon Area: Sidewalks: 6,288 Sq. Ft. 0.14 Acres Buildings: 40,024 Sq. Ft. 0.92 Acres Pavement/Curb: 52,637 Sq. Ft. 1.21 Acres Total Built Upon Area: Pre - development 7,381 Sq. Ft. 0.17 Acres Post - development 98,949 Sq. Ft. 2.27 Acres Total BUA 106,330 Sq. Ft. 2.44 Acres Total Drainage Area: 313,212 Sq. Ft. 7.19 Acres Proposed BUA Estimate: 33.95% Project Name Volume - . ,- Date Uni- Health Post -Acute Care Computations Dec., 2011 HUA Project No. RK1103 Stormwater Wetlands #1 Location �� Hobbs Upchurch Associates Rockingham, engineering I planning surveying Calculated By North Carolina 800.849.1861 a www.hobbsupchurch.com Chadotte . Wilmmgwn . Nags Head . Southern Pines �Dw SUPERIOR PERFORMANCE THROUGH INNOVATIVE DESIGN Checked By JEH MINIMUM VOLUME REQUIRED. USE SIMPLE METHOD, COMPARE TO DISCRETE SCS METHOD Treatment Volume: Control and treat the first 1.0 inches of rain Additional Requirements: No additional requirements Watershed Size: 7.19 acres * Percent Impervious Area: 33.95 % Total Composite CN 75.13 Impervious Area: 2.441 acres Pervious Area: 4.749 acres * Percent impervious from built upon area calculations within drainage area Water Quality Storm: 1.0 inch Hydrologic Soil Group: Mostly A (Varies, See Composite HSG Computations) Pervious Land Use CN: 68 (See Pre - Developed Composite CN Computations) Impervious Land Use CN: 89 RUNOFF OF-TF:KMINATION: NCDENR Stormwater BMP Manual Section 3.3 Discrete SCS Method PRECIPITATION (P): 1.00 inches (Water Quality Storm) BREAKDOWN OF SOIL STORAGE (S): Formula: S= 1000 1CN -10 Impervious (S): 1.236 inches Pervious (S): 4.706 inches BREAKDOWN OF RUNOFF (R/O): Formula: R10= (P- 0.2 *S) ` / (P +0.8 *S) Impervious (R/0): 0.285 inches Pervious (R/O): 0.001 inches BREAKDOWN OF 'FIRST FLUSH' (V): Formula: V =Area *Runoff Depth Impervious (V): 0.696 acre - inches Pervious (V): 0.003 acre - inches TREATMENT VOL. REQUIRED (VTREAT): Formula: VTREAT= Impervious V + Pervious V (VTREAT): 0.699 acre - inches (VTREAT): 2,538 ft3 Simple Method 18: 0.3395 (Impervious fraction) Ro: 1.0 in (Water Quality Storm) A: 7.19 acres (Watershed Area) RUNOFF COEFFICIENT (Rv): Formula: R v= 0.05 +0.9 *18 R,,: 0.35555 TREATMENT VOL. REQUIRED (VTREAT): Formula: VTReaT=RD *Rv A (VTREAT): 9,280 fe (VTREATY 2.556 acre - inches USE: (VTREAT): 2.556 acre - inches Name 1 Location Uni- Health Post -Acute Care 2 -5 Day Drawdown Orifice Sizing Stormwater Wetlands #1 NJ Hobbs Upchurch Associates Rockingham, engineering I planning I surveying North Carolina 800.849.1861 a www.hobbsupchurch.com Charlotte . Wilmington . Nags Head . Southern Pines SUPERIOR PERFORMANCE THROUGH INNOVATIVE DESIGN 2 Day Calculations Q2 =Temp. Pool Vol / 2 days 9,279.80 cf Volume of Temporary Pool (cf) 172,800 sec. 2 days time (seconds) 02 =1 0.054 cfs 5 Day Calculations QS =Temp. Pool Vol / 5 days 9,279.80 cf Volume of Temporary Pool (cf) 432,000 sec. 5 days time (seconds) Q5 =1 0.021 cfs Orifice and Drawdown Calculations 1.00 Height of storage (ft.) 1.25 in Orifice Diameter (in.) A = 0.0085 sf Orifice Area (sf) h = 0.316 ft Average Head CI) = 0.60 in Orifice Coefficient Orifice Equation: Q=J 0.023 cfs 5 Day < Drawdown < 2 Day 0.021 cfs 0.023 cfs 0.054 cfs Sufficient Drawdown Date Dec., 2011 HUA Project No. RK1103 Calculated By FDW Checked By JEH UNIHEALTH POST -ACUTE CARE ROCKINGHAM, NC ANTI- FLOATATION COMPUTATIONS Enter Data FOR RECTANGULAR SECTION STRUCTURE LEGEND WETLAND -1 Verfiy Data BASIN -1 CONTROL: Unit Weight of Water: 62.4 Ibs /cf Unit Weight of Conc. 1 150 Ibs /cf STRUCTURE WEIGHT: ft -msl (Rim Elevation) STRUCTURE SIDES: 269.00 ft -msi (Top of Sides) Riser Inside Length Dimension: 3 ft Riser Inside Width Dimension: 2 ft Thickness of Concrete: 0.5 ft 4 j Riser Outside Length Dimensions: 4 Riser Outside Width Dimensions: 3 2 5.2 ft -msi (Barrel Invert) Volume of Sides: 22.8 cf 264.7 ft -msi (Initial Bottom of Structure) Weight of Concrete Sides: 3,420 Ibs 265.20 ft -msl (Invert with Anti - Float) 264.70 ft -msl (Bottom with Anti - Float) 0.5 STRUCTURE BOTTOM: STRUCTURE TOP: Riser Inside Length Dimension: 3 ft Riser Inside Length Dimension: 3 ft Riser Inside Width Dimension: 2 ft Riser Inside Width Dimension: 2 ft Thickness of Concrete: 0.5 ft Thickness of Concrete: 0 ft Riser Outside Length Dimensions: 4 ft Riser Outside Length Dimensions: 4 ft Riser Outside Width Dimensions: 3 ft Riser Outside Width Dimensions: 3 ft Volume of Bottom: 6 cf Volume of Top Slab: 0 cf Weight of Concrete Bottom: 0,900 Ibs Weight of Concrete Bottom: 0,000 Ibs INITIAL WEIGHT OF STRUCTURE: 4,320 LBS INITIAL DESIGN O.K. BOUYANCY FORCE: ANTIFLOTATION: Weir Elevation: 269 ft-msl Use Bottom Inv. Elev: 265.20 ft -msl (Fill with Concrete) Trial Bottom of Box: 264.7 ft-msl Additional Str. Wt: 0,000 ibs Inside Area of Riser: 6 sq. ft Add. Bouy. Force: 0,000 ibs Outside Area of Riser: 12 sq. ft TOTAL STR. WT: 4,320 Volume of Water Displaced: 51.6 cf TOTAL BOUYANCY: 3,220 Initial Bouyancy Force: 3,220 Ibs Safety Factor: 1.3417 (Minimum S.F. must be —1.1) Message: Design o.k. WETLAND #2 of wAr�R NCDENR ° STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WETLAND SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all the required information. I. PROJECT INFORMATION Project name Uni- Health Post -Acute Care Contact name Jarrod E. Hilliard, PE, CFM Phone number 910 -692 -5616 Date Drainage area number December, 2011 2 II. DESIGN INFORMATION Site Characteristics Drainage area 90,033.00 ftz Impervious area 37,347.00 ftz Percent impervious 41.5%% Design rainfall depth 1.00 inch Peak Flow Calculations ft3 1 -yr, 24 -hr rainfall depth 3.09 in 1 -yr, 24 -hr intensity 0.13 in /hr Pre - development 1 -yr, 24 -hr runoff 0.09 ft3 /sec Post - development 1 -yr, 24 -hr runoff 0.18 ft3 /sec Pre /Post 1 -yr, 24 -hr peak control 0.09 ft3 /sec Storage Volume: Non -SA Waters Minimum required volume 3,176.16 ft3 Volume provided (temporary pool volume) 3,444.92 ft3 OK Storage Volume: SA Waters Parameters 1.5" runoff volume ft3 Pre - development 1 -yr, 24 -hr runoff volume ft3 Post - development 1 -yr, 24 -hr runoff volume ft3 Minimum volume required ft3 Volume provided ft3 Outlet Design Depth of temporary pool /ponding depth (DPI) 12.00 in OK Drawdown time 3.00 days OK Drawdown orifice diameter may be insufficient. Please provide Diameter of orifice 1.00 in adequate supporting calculations. Coefficient of discharge (CD) used in orifice diameter 0.60 (unitless) calculation Driving head (Ho) used in the orifice diameter calculation 1.00 ft OK Form SW401- Wetland- Rev.6- 11/16/09 Parts I and II. Project Design Summary, Page 1 of 3 Surface Areas of Wetland Zones Surface Area of Entire Wetland Shallow Land The shallow land percentage is: Shallow Water The shallow water percentage is: Deep Pool Forebay portion of deep pool (pretreatment) The forebay surface area percentage is: Non - forebay portion of deep pool The non- forebay deep pool surface area percentage is: Total of wetland zone areas Add or subtract the following area from the zones Topographic Zone Elevations Temporary Pool Elevation (TPE) Shallow Land (top) Permanent Pool Elevation (PPE) Shallow Water /Deep Pool (top) Shallow Water bottom Most shallow point of deep pool's bottom Deepest point of deep pool's bottom Design must meet one of the following two options: This design meets Option #1, Top of PPE is within 6" of SHWT, If yes: SHWT (Seasonally High Water Table) This design meets Option #2, Wetland has liner with permeability < 0.01 in /hr, If yes: Depth of topsoil above impermeable liner Topographic Zone Depths Temporary Pool Shallow Land Permanent Pool Shallow Water Deep Pool (shallowest) Deep Pool (deepest) Planting Plan Are cattails included in the planting plan? Number of Plants recommended in Shallow Water Area: Herbaceous Wcubic -inch container) Number of Plants recommended in Shallow Land Area: Herbaceous Wcubic -inch container), OR Shrubs (1 gallon or larger), OR Trees (3 gallon or larger) and Herbaceous (4+ cubic -inch) Number of Plants provided in Shallow Water Area: Herbaceous (4'cubic -inch container) Number of Plants provided in Shallow Land Area: Herbaceous Wcubic -inch container) Shrubs (1 gallon or larger) Trees (3 gallon or larger) and Grass -like Herbaceous (4+ cubic -inch) 3,444.92 ftz OK 1,371.56 ftz OK 40%% 1,383.38 ftz OK 40%% 347.77 ftz OK 10% % 342.21 ftz OK 10%% 3,444.92 ft2 OK 0.00 ftz 268.00 ft amsl 267.00 ft amsl 266.75 ft amsl 264.00 ft amsl 264.00 ft amsl N (Y or N) 267.58 ft amsl PPE Not Within 6 in of SHWT, Must Use Option #2 Y (Y or N) 4.00 in OK 12.00 in OK 3.01 in OK 36.00 in OK 36.00 in OK N (Y or N) OK 350 350 56 7 and 280 Form SW401- Weiland- Rev.6- 11/16/09 Parts I and II. Project Design Summary, Page 2 of 3 Additional Information Can the design volume be contained? Y (Y or N) OK Does project drain to SA waters? If yes, N (Y or N) Excess volume must pass through filter. What is the length of the vegetated filter? ft Are calculations for supporting the design volume provided in the Y (Y or N) OK application? Is BMP sized to handle all runoff from ultimate build -out? Y (Y or N) OK Is the BMP located in a recorded drainage easement with a Y (Y or N) OK recorded access easement to a public Right of Way (ROW)? The length to width ratio is: 10.33 :1 OK Approximate wetland length 186.00 ft Approximate wetland width 18.00 ft Approximate surface area using length and width provided 3,348.00 ft o This approx. surface area is within this number of square feet f the entire wetland surface area reported above: Will the wetland be stabilized within 14 days of construction? Y (Y or N) OK Form SW401- Wetland- Rev.6- 11/16/09 Parts I and 11. Project Design Summary, Page 3 of 3 Permit No. (to be provided by DWQ) III. REQUIRED ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Initials Page/ Plan --r- ,� Sheet No. 1 c-OS J�0_)w C -05 C —v2 p-Up P-Do C -05 CIOL C-U G —oS cA C� I �1G1� Plans (1" - 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Wetland dimensions (and length to width ratio), - Pretreatment system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Overflow device, and - Boundaries of drainage easement. 2. Plan details (1" = 50' or larger) for the wetland showing: - Wetland dimensions (and length to width ratio) - Pretreatment system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Design at ultimate build -out, - Off -site drainage (if applicable), - Overflow device, and - Boundaries of drainage easement. Section view of the wetland (1" = 20' or larger) showing: - Side slopes, 3:1 or lower - Wetland layers All wetlands: Shallow land depth, shallow water depth, deep pool depth Option 1, no clay liner: SLWT depth Option 2, clay liner: Depth of topsoil on top of liner, liner specifications 4. A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing: - A variety of several suitable species (not including cattails), - Sizes, spacing and locations of plantings, - Total quantity of each type of plant specified, - A planting detail, - The source nursery for the plants, and - Fertilizer and watering requirements to establish vegetation. 5. A construction sequence that shows how the wetland will be protected from sediment until the entire drainage area is stabilized. 6. The supporting calculations (including drawdown calculations). 7. A copy of the signed and notarized operation and maintenance (0 &M) agreement. 8. A copy of the deed restrictions (if required). 9. A soils report that is based upon an actual field investigation and soil borings. County soil maps are not an acceptable source of soils information. SW401- Wetland- Rev.6- 11/16/09 Part III, page 1 of 1 Wetlands Area Supporting Calculations Area - #2 Peak Inflow Calculations Drainage Area A 90,033 sf 2.07 Acres Pre-development Im ervious Area 0 sf 0.00 Acres Post-development Impervious Area 37,347 sf 0.86 Acres Im 0.00% 1.1.48% Includes Pre - development Pre- develo ment Run -off Coefficient C 0.30 Post- development Run-off Coefficient C 0.55 Rainfall Depth Rd 1.00 1 Yr. 24 hr rainfall intensitv t I 1 0.13 in /hr Pre - development 1 -yr, 24 -hr peak flow (Q) Q =C *I *A Q� Post - development 1 -yr, 24 -hr peak flow (Q) Q = C *I *A Q = Storage Volumes: Non SR Waters Calculations Rv = .05 +.9 *(impervious (ac) /DA (ac)) Rv = ume required = 3630 * Rd * Rv V= Basin Structure Calculations 0.08 cfs 0.15 cfs M-411 Total Surface Area at PPE 1 3,444.92 sf Surface Area of Shallow Land 1,371.56 sf Surface Area of Shallow Land - Perceta a 39.81% Suitable Surface Area of Shallow Water 1,383.38 sf Surface Area of Shallow Water - Perceta a 40.16% Suitable Surface Area of Forebay 347.77 sf Surface Area of Foreba - Percetage 10.10% Suitable Surface Area of Dee Pool Outlet 342.21 sf Surface Area of Deep Pool Outlet - Percetaae 9.93% Suitable Project Name Pre- Development Curve Numbers '` Date Uni- Health Post -Acute Care for Design Dec., 2011 Stormwater Wetlands #2 HUA Project No. Location VI Hobbs Upchurch Associates RK1103 ki Rocngham, I engineering I planning I surveying Calculated By North Carolina 800.849.1861 a www.hobbsupchurch.com FDW Charlotte - Wilmington - Nags Head - Southern Pines Checked By SUPERIOR PERFORMANCE THROUGH INNOVATIVE DESIGN 1 2 3 4 5 Project consists of the following Soil Groups: Soil Type Name Grade CN for Grade Percent Soil CaC Candor and Wakulla A 69 100% Compost Pre - Development: (soil type 1 % X CN) +(soil type 2 % X CN) = Pre - Development CN USE Pre - Development CN: 1 69 Project Name Built Upon Area Date UniHealth Post -Acute Care Computations Dec., 2011 Stormwater Wetlands #2 HUA Project No. Location V� Hobbs Upchurch Associates RK1103 Rockingham, �"■ engineering I planning I surveying Calculated By North Carolina 800.849.1861 a www.hobbsupchurch.com FDW Charlotte - Wilmington - Nags Head - Southern Pines Checked By SUPERIOR PERFORMANCE THROUGH INNOVATIVE DESIGN TKG '.. 6, ~'!r'ti•��'r': ':7 :' tF`�-: rius «= ;f`.L'^ rl�:�i�'� ',t.)2' "� i=-1ii �y.. .`- '.: "�.'N._. = '�'ai� - ^?1�:'r k7?;ii'. ,y -. Impervious Areas: Pre - development Sidewalks: 000 Sq. Ft. 0.00 Acres Buildings: 0,000 Sq. Ft. 0.00 Acres Pavement/Curb: 0,000 Sq. Ft. 0.00 Acres Post - development Sidewalks: 0,733 Sq. Ft. 0.02 Acres Buildings: 24,639 Sq. Ft. 0.57 Acres Pavement/Curb: 11,975 Sq. Ft. 0.27 Acres Total Built Upon Area: Pre - development Post - development Total BUA Total Drainage Area: Proposed BUA Estimate: 0,000 Sq. Ft. 0.00 Acres 37,347 Sq. Ft. 1 0.86 Acres 37,347 Sq. Ft. 0.86 Acres 90,033 Sq. Ft. 1 2.07 Acres 41.48% Project Name Volume Date Uni- Health Post -Acute Care Computations Dec., 2011 HUA Project No. RK1103 Stormwater Wetlands #2 Location Hobbs Upchurch Associates Rockingham, engineering I planning surveying 7 Calculated By North Carolina 800.849.1861 a www.hobbsupchurch.com Charlotte . Wilmington • Nags Head . Southern Pin.. FDW SUPERIOR PERFORMANCE THROUGH INNOVATIVE DESIGN Checked By JEH MINIMUM VOLUME REQUIRED. USE SIMPLE METHOD, COMPARE TO DISCRETE SCS METHOD Treatment Volume: Control and treat the first 1.0 Inches of rain Additional Requirements: No additional requirements Watershed Size: 2.07 acres ` Percent Impervious Area: 41.48 % Total Composite CN 77.30 Impervious Area: 0.859 acres Pervious Area: 1.211 acres ` Percent impervious from built upon area calculations within drainage area Water Quality Storm: 1.0 inch Hydrologic Soil Group: Mostly A (Varies, See Composite HSG Computations) Pervious Land Use CN: 69 (See Pre - Developed Composite CN Computations) Impervious Land Use CN: 89 RUNOFF OF-TF:KMINATION: NCDENR Stormwater BMP Manual Section 3.3 Discrete SCS Method PRECIPITATION (P): 1.00 inches (Water Quality Storm) BREAKDOWN OF SOIL STORAGE (S): Formula: S= 1000 1CN -10 Impervious (S): 1.236 inches Pervious (S): 4.493 inches BREAKDOWN OF RUNOFF (RIO): Formula: R/0= (P- 0. 2eS) ` / (P +0.8eS) Impervious (R/0): 0.285 inches Pervious (R/O): 0.002 inches BREAKDOWN OF'FIRST FLUSH' (V): Formula: V= AreaeRunoff Depth Impervious (V): 0.245 acre - inches Pervious (V): 0.003 acre - inches TREATMENT VOL. REQUIRED (VTREATY Formula: VTREyT, Impervious V + Pervious V (VTREATY 0.247 acre - inches (VTREATY 0,898 It, Simple Method 18: 0.4148 (Impervious fraction) Ro: 1.0 in (Water Quality Storm) A: 2.07 acres (Watershed Area) RUNOFF COEFFICIENT (Rv): Formula: R v= 0.05 +0.9 *I a R,,: 0.42332 TREATMENT VOL. REQUIRED (VTREAT): Formula: V TREAT =R o R v A (VTREATY 3,181 ft, (VTREATY 0.876 acre - inches USE: (VTREAT): 0.876 acre - inches Project Name I Location Uni- Health Post -Acute Care Rockingham, North Carolina 2 Day Calculations Qz =Temp. Pool Vol / 2 days 2 -5 Day Drawdown Date Orifice Sizing Dec., 2011 Stormwater Wetlands #2 HUA Project No. Hobbs Upchurch Associates RK1103 NJ engineering I planning I surveying Calculated By 800.849.1861 a www.hobbsupchurch.com FDW Charlotte . Wilmington . Nags Head . Southern Pines Checked By SUPERIOR PERFORMANCE THROUGH INNOVATIVE DESIGN JEH 3,444.92 cf Volume of Temporary Pool (cf) 172,800 sec. 2 days time (seconds) QZ =1 0.020 cfs 5 Day Calculations Q5 =Temp. Pool Vol / 5 days 3,444.92 cf Volume of Temporary Pool (cf) 432,000 sec. 5 days time (seconds) Q5 = 0.008 cf8 Orifice and Drawdown Calculations 1.00 ft Height of storage (ft.) 1.00 in Orifice Diameter (in.) A = 0.0055 sf Orifice Area (sf) h = 0.319 ft Average Head Co = 0.60 in Orifice Coefficient Orifice Equation: Q=J 0.015 cfs 5 Day Drawdown < 2 Da 0.008 cfs 0.015 cfs 0.020 cfs Sufficient Drawdown UNIHEALTH POST -ACUTE CARE ROCKINGHAM, NC ANTI - FLOATATION COMPUTATIONS Enter Data FOR RECTANGULAR SECTION STRUCTURE LEGEND WETLAND -2 VerBy Data BASIN -1 CONTROL: Unit Weight of Water: 62.4 Ibs /cf Unit Weight of Conc. 150 Ibs /cf STRUCTURE WEIGHT: 0 ft ft -msl (Rim Elevation) STRUCTURE SIDES: 268.00 ft-msl (Top of Sides) Riser Inside Length Dimension:�ft Riser Inside Width Dimension: 2 ft Thickness of Concrete: 0.5 ft — ► 0.5 ft Riser Outside Length Dimensions: 4 Riser Outside Width Dimensions: 3 265.2 ft -msi (Barrel Invert) Volume of Sides: 16.8 cf 264.7 ft -msl (Initial Bottom of Structure) Weight of Concrete Sides: 2,520 Ibs 265.20 ft -msi (Invert with Anti - Float) 264.70 ft-msl (Bottom with Anti - Float) 0.5.: ft STRUCTURE BOTTOM: STRUCTURE TOP: Riser Inside Length Dimension: 3 It Riser Inside Length Dimension: 3 It Riser Inside Width Dimension: 2 ft Riser Inside Width Dimension: 2 It Thickness of Concrete: 0.5 ft Thickness of Concrete: 0 It Riser Outside Length Dimensions: 4 ft Riser Outside Length Dimensions: 4 ft Riser Outside Width Dimensions: 3 It Riser Outside Width Dimensions: 3 It Volume of Bottom: 6 cf Volume of Top Slab: 0 cf Weight of Concrete Bottom: 0,900 Ibs Weight of Concrete Bottom: 0,000 Ibs INITIAL WEIGHT OF STRUCTURE: 3,420 LBS INITIAL DESIGN O.K. BOUYANCY FORCE: ANTIFLOTATION: Weir Elevation: 268 ft -msl Use Bottom Inv. Elev: 285.20 ft -msl (Fill with Concrete) Trial Bottom of Box: 264.7 ft-msl Additional Str. Wt: 0,000 lbs Inside Area of Riser: 6 sq. ft Add. Bouy. Force: 0,000 Ibs Outside Area of Riser: 12 sq. It TOTAL STR. WT: 3,420 Volume of Water Displaced: 39.6 cf TOTAL BOUYANCY: 2,471 Initial Bouyancy Force: 2,471 Ibs Safety Factor: 1.384 (Minimum S.F. must be > =1.1) Message: Design o.k. EROSION & SEDIMENTATION CONTROL COMPUTATIONS T AG ❑ (V w Cl) R Cl) y n 3 0 0 0 0 0 J w` I LL _ g000� a Z�HOW3.— Z ❑ ^ �? j > Vt N Oi (O a0 .� C3 i -- cow C,4w 6,6 0 F5 J0>TO ww It 0 wFa CV CO N C7$ (D �a 04 "t 0) O) Y N N j M 0Q0 Y Y 0000 Y �m MN�OCo 0 Z m E« a �% °r°F, N .4- ❑ y a N w O 3Lu Nom' 0:6000000 YYYY Y �y Ct0 4m � CO N Q C,) N p C,V a E D c/1 ZO700O�Op J M O co .6 g 10 ❑ E o 0cr� 0 0 O 0 010 m r< N N I I N V S N M b c EJ O co E a 'E N O C y l0 �O Z CL rO N O) •0-,f444 m O 10 10 - t d cx of u� .2 c! Q d40000 M C6 vi ch of c IT ip O 3 c a a « yn p N N N N N ) C U c I y N a C N r U c € A', CL C5 p N 0 s�ii U o gg%�rnn� � to �- r te a 0 2 so) 7 U t:O N m 7- f0 to LO W Q Q c Z O CL e'aoaocGco 0 0 0 d L•Lj E Za E - ��,. �� EMS_ 9° N VZ• • Q rn v r w d) O C O co co N N -1.0 y j 0= a' C U U O O N L M c0 w c6 c6 L .� N a❑ J j N O C— p t-NN j C V .4-y ITE 7 k C e V C,4 �O cO0 �O t0� 'to $ °` YA •� 00000 N V N- O E N f a N O. y— • _ a ° � � OO L« Q N (� Yammmm C N O1J n O 7 }O L a fv C ,ey Q r ado, OE O) N ❑ 10 O NE N a X N O- N O O K i V c� N 7 O Q` O •— N yy 3 x N_ N ❑ Q CO 7 d O r 0 O) 0 N N} M c0 N c) c) ,� C V N c0 0 #,N C C_ L Cn O v) LL " � ,_, w ._ ❑. N N E p N W �mmm ill "'7— y n m ~ yyyy C]lI L in w a� $ '� E d I a�i ;Im w c C-4 C-) Faircloth Skimmer Sizing User Data Basin ID SKB -1 10533 cf Volume to Drain Drawdown Period = 3 Days # of Skimmers = 1 Select Skimmer Head 3 Day Drawdown 3 Day Factor Orifice (Rad.) Orifice (Dia.) 1.5 in 1.5 in 5184 cf 2880 2.0 in 2.0 in 9849 cf 3369 X 2.5 in 2.0 in 16500 cf 3456 1.0 in 2.0 in 3.0 in 3.0 in 29321 cf 4148 4.0 in 3.3 in 54801 cf 4362 5.0 in 4.0 in 98496 cf 4925 6.0 in 5.0 in 155520 cf 5442 8.0 in 6.0 in 293934 cf 5961 Basin ID SKB -2 4677 cf Volume to Drain Drawdown Period = 3 Days # of Skimmers = 1 Select Skimmer Head 3 Day Drawdown 3 Day Factor Orifice (Rad.) Orifice (Dia.) X 1.5 in 1.5 in 5184 cf 2880 0.7 in 1.4 in 2.0 in 2.0 in 9849 cf 3369 2.5 in 2.0 in 16500 cf 3456 3.0 in 3.0 in 29321 cf 4148 4.0 in 3.3 in 54801 cf 4362 5.0 in 4.0 in 98496 cf 4925 6.0 in 5.0 in 155520 cf 5442 8.0 in 6.0 in 293934 cf 5961 Basin ID SKB -3 2178 cf Volume to Drain Drawdown Period = 3 Days # of Skimmers = 1 Select Skimmer Head 3 Day Drawdown 3 Day Factor Orifice (Rad.) Orifice (Dia.) X 1.5 in 1.5 in 5184 cf 2880 0.5 in 1.0 in 2.0 in 2.0 in 9849 cf 3369 2.5 in 2.0 in 16500 cf 3456 3.0 in 3.0 in 29321 cf 4148 4.0 in 3.3 in 54801 cf 4362 5.0 in 4.0 in 98496 cf 4925 6.0 in 5.0 in 155520 cf 5442 8.0 in 6.0 in 293934 cf 5961 Basin ID SKB-4 2450 cf Volume to Drain Drawdown Period = 3 Days # of Skimmers = 1 Select Skimmer Head 3 Day Drawdown 3 Day Factor Orifice (Rad.) Orifice (Dia.) X 1.5 in 1.5 in 5184 cf 2880 0.5 in 1.0 in 2.0 in 2.0 in 9849 cf 3369 2.5 in 2.0 in 16500 cf 3456 3.0 in 3.0 in 29321 cf 4148 4.0 in 3.3 in 54801 cf 4362 5.0 in 4.0 in 98496 cf 4925 6.0 in 5.0 in 155520 cf 5442 8.0 in 6.0 in 293934 cf 5961 mill Diversion Swale No.1 r0i Project Name UniHealth Post -Acute Care Hobbs, Upchurch & Associates, P.A. Consulting Engineers Location Rockingham, North Carolina )NS: Determine the MAXIMUM velocity, V, through the TYPICAL SECTION Use Trial & Error to make the flow depth, d, result with Q = Q10 STORM: 10 -YEAR Qio = CIA C= 0.30 Calculations based on 5 minutes ToC. 1= 8.05 Qio: 3.7 cfs A= 1.55 Dec., 2011 HUA Project No. RK1103 Calculated By FDW Checked By TKG The velocity of the water entering a maintained veg swale must be <5 ft/s MAXIMUM d = 0.510 FT A= 0.78 FT "2 Slope Condition 3.06 FT Max. Slop P = 3.23 FT Side Sio n = 0.030 (DEHNR, 1993) R = 0.24 B = 0 FT Q= 3.7 CFS Z = 3 :1 V= 4.74 FPS S = 0.0604 FT /FT W = 3.06 FT LINING TYPE: LINING EM S &M SEED & MULCH Shear Stress: T =YDS EM EXCELSIOR MAT T= 1.92 Lb /SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT DIMENSIONS: Q= Peak Discharge, (CFS) d = Maximum Depth of Water, (FT) V = Trial Velocity, (FPS) n = Manning's "n" Coefficient B = Bottom Width of Channel, (FT) Z = Side Slope of Channel (Z:1) A = Cross - Sectional Area of Flow, P = Wetted Perimeter of the Flow, (FT) R = Hydraulic Radius, (FT) S = Slope of the Channel, (FT /FT) Q = Trial Discharge, (CFS) W = Top Width of Water in Channel, T= Shear Stress in Lb /SF Y= Wt of Water (62.4 Ib /cf) D= Depth Of Flow S= Slope Of Swale Min. Depth 0.51 FT Bottom Width 0 FT Top Width 3.06 FT Max. Slop 6.04% Side Sio 3 :1 Unin EM (DEHNR, 1988; DEHNR, 1993) at Min. Depth mill r%qj Hobbs, l ISOLUTIONS: IDESIGN STORM: k & Associates, P.A. Consulting Engineers Diversion Swale Nb.2 Name UniHealth Post -Acute Care Rockingham, North Carolina Determine the MAXIMUM velocity, V, through the TYPICAL SECTION Use Trial & Error to make the flow depth, d, result with Q = Q10 10 -YEAR Qio = CIA C= 0.35 Calculations based on 5 minutes ToC. 1= 8.05 Q10: 0.7 cfs A= 0.25 Date Dec., 2011 HUA Project No. RK1103 Calculated By FDW Checked By TKG The velocity of the water entering a maintained veg swale must be <5 ft/s lum d = 0.380 FT A= 0.43 FT "2 Condition 2.28 FT P = 2.40 FT n = 0.030 (DEHNR, 1993) R = 0.18 B = 0 FT Q = 0.7 CFS Z = 3 :1 V= 1.58 FPS S = a0100 FT /FT W= 2.28 FT ILINING TYPE: Shear Stress: [TERMINOLOGY: IFINISHED DIMENSIONS: LINING EM S &M SEED & MULCH T =YDS EM EXCELSIOR MAT T= 0.24 LbISF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT Q= Peak Discharge, (CFS) d = Maximum Depth of Water, (FT) V = Trial Velocity, (FPS) n = Manning's "n" Coefficient B = Bottom Width of Channel, (FT) Z = Side Slope of Channel (ZA ) A = Cross - Sectional Area of Flow, P = Wetted Perimeter of the Flow, (FT) R = Hydraulic Radius, (FT) S = Slope of the Channel, (FT /FT) Q = Trial Discharge, (CFS) W = Top Width of Water in Channel, T= Shear Stress in Lb /SF Y= Wt of Water (62.4 Ib /cf) D= Depth Of Flow S= Slope Of Swale Min. Depth 0.38 FT Bottom Width 0 FT Top Width 2.28 FT Max. Slope 1.00% Side SlaLm 3 :1 Lining EM (DEHNR, 1988, DEHNR, 1993) at Min. Depth Kul Diversion Swale No.3A FW Project Name UniHealth Post -Acute Care Hobbs, Upchurch & Associates, P.A. Consulting Engineers Location Rockingham, North Carolina STORM: MAXIMUM Slope Condition LINING TYPE: Shear Stress: DIMENSIONS: Iil49= c14:Iy *A Date Dec., 2011 HUA Project No. RK1103 Calculated By FDW Checked By TKG Determine the MAXIMUM velocity, V, through the TYPICAL SECTION Use Trial & Error to make the flow depth, d, result with Q = Q10 10 -YEAR Qio = CIA Top Width 2.7 FT C= 0.40 Calculations based on 5 minutes ToC. 1= 8.05 Q10: 2.1 cfs A= 0.65 The velocity of the water entering a maintained veg Swale must be <5 ft/s d = 0.450 FT A = 0.61 FT "2 P = 2.85 FT n = 0.030 (DEHNR, 1993) R = 0.21 B= 0 FT Q= 2.1 CFS Z= 3 :1 V= 3.38 FPS S = 0.0364 FT /FT W = 2.70 FT LINING EM S &M SEED & MULCH T =YDS EM EXCELSIOR MAT T= 1.02 LbiSF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT Q= Peak Discharge, (CFS) d = Maximum Depth of Water, (FT) V = Trial Velocity, (FPS) n = Manning's "n" Coefficient B = Bottom Width of Channel, (FT) Z = Side Slope of Channel (Z:1) A= Cross - Sectional Area of Flow, P = Wetted Perimeter of the Flow, (FT) R = Hydraulic Radius, (FT) S = Slope of the Channel, (FT /FT) Q = Trial Discharge, (CFS) W = Top Width of Water in Channel, T= Shear Stress in Lb /SF Y= Wt of Water (62.4 Ib /cf) D= Depth Of Flow S= Slope Of Swale Mln. Depth OA5 FT Bottom Width 0 FT Top Width 2.7 FT Max. Slope 3.64% Slide Slopes 3 :1 Linin EM (DEHNR, 1988, DEHNR, 1993) at Min. Depth mill Diversion Swale No 3B I "%J Project Name UniHealth Post -Acute Care Hobbs, Upchurch & Associates, P.A. Consulting Engineers Location Rockingham, North Carolina STORM: Slope Condition LINING TYPE: Shear Stress: TERMINOLOGY: FINISHED DIMENSIONS: Dec., 2011 HUA Project No. RK1103 Calculated By FDW Checked By TKG Determine the MAXIMUM velocity, V, through the TYPICAL SECTION Use Trial & Error to make the flow depth, d, result with Q = 010 10 -YEAR Qio = CIA Top Width 5.2 FT C= 0.40 Calculations based on 5 minutes ToC. 1= 8.05 Q10: 4.1 cfs A= 1.26 The velocity of the water entering a maintained veg swale must be <5 ft/s d = 0.450 FT A = 1.73 FT-%2 P = 5.35 FT n = 0.030 (DEHNR, 1993) R = 0.32 B = 2.5 FT Q = 4.1 CFS Z = 3 :1 V= 2.34 FPS S = 0.0100 FT /FT W= 5.20 FT LINING EM S &M SEED & MULCH T =YDS EM EXCELSIOR MAT T= 0.28 Lb /SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT Q= Peak Discharge, (CFS) d = Maximum Depth of Water, (FT) V = Trial Velocity, (FPS) n = Manning's "n" Coefficient B = Bottom Width of Channel, (FT) Z = Side Slope of Channel (Z:1) A = Cross - Sectional Area of Flow, P = Wetted Perimeter of the Flow, (FT) R = Hydraulic Radius, (FT) S = Slope of the Channel, (FT /FT) Q = Trial Discharge, (CFS) W = Top Width of Water in Channel, T= Shear Stress in Lb /SF Y= Wt of Water (62.4 Ib /cf) D= Depth Of Flow S= Slope Of Swale Min. Depth 0.45 FT Bottom Width 2.5 FT Top Width 5.2 FT Max. Slope 1.00% Side Slopes 3 :1 UnIng EM (DEHNR, 1988, DEHNR, 1993) at Min. Depth Diversion Swale No.4 Project Name UniHealth Post -Acute Care Hobbs, Upchurch & Associates, P.A. Consulting Engineers Location Rockingham, North Carolina STORM C1011�A MAXIMUM Slope Condition LINING TYPE: Shear Stress: DIMENSIONS: REFERENCES: Date Dec., 2011 HUA Project No. RK1103 Calculated By FD W Checked By TKG Determine the MAXIMUM velocity, V, through the TYPICAL SECTION Use Trial & Error to make the flow depth, d, result with Q = Q10 10 -YEAR Q10 = CIA Top Width 3.96 FT C= 0.30 Calculations based on 5 minutes ToC. 1= 8.05 Q,o: 3.0 cfs A= 1.26 The velocity of the water entering a maintained veg swale must be <5 ft/s d = 0.660 FT A= 1.31 FT-%2 P = 4.17 FT n = 0.030 (DEHNR, 1993) R = 0.31 B = 0 FT Q= 3.0 CFS Z = 3 :1 V= 2.29 FPS S = 0.0100 FT /FT W= 3.96 FT LINING EM S &M SEED & MULCH T =YDS EM EXCELSIOR MAT T= 0.41 Lb /SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT Q= Peak Discharge, (CFS) d = Maximum Depth of Water, (FT) V = Trial Velocity, (FPS) n = Manning's "n" Coefficient B = Bottom Width of Channel, (FT) Z = Side Slope of Channel (Z:1) A = Cross- Sectional Area of Flow, P = Wetted Perimeter of the Flow, (FT) R = Hydraulic Radius, (FT) S = Slope of the Channel, (FT /FT) Q = Trial Discharge, (CFS) W = Top Width of Water in Channel, T= Shear Stress in Lb /SF Y= Wt of Water (62.4 Ib /cf) D= Depth Of Flow S= Slope Of Swale Min. Depth 0.66 FT Bottom Width 0 FT Top Width 3.96 FT Max. Slope 1.00% Side Slopes 3 :1 UnIny EM (DEHNR, 1988; DEHNR, 1993) A Min. Depth MINE Diversion Swale No.S Nni Project Name UniHealth Post -Acute Care Hobbs, Upchurch & Associates, P.A. Consulting Engineers Location Rockingham, North Carolina STORM: INOTE: MAXIMUM Slope Condition LINING TYPE: Shear Stress: FINISHED DIMENSIONS: Dec., 2011 HUA Project No. RK1103 Calculated By FDW Checked By TKG Determine the MAXIMUM velocity, V, through the TYPICAL SECTION Use Trial & Error to make the flow depth, d, result with Q = Q10 10 -YEAR Clio = CIA T2p Width 1.86 FT C= 0.65 Calculations based on 5 minutes ToC. 1= 8.05 Q10: 1.2 cfs A= 0.22 The velocity of the water entering a maintained veg swale must be <5 ft/s d = 0.310 FT A = 0.29 FT "2 P = 1.96 FT n = 0.030 (DEHNR, 1993) R = 0.15 B = 0 FT Q= 1.2 CFS Z = 3 :1 V= 4.17 FPS S = a0909 FT /FT W= 1.86 FT LINING EM S &M SEED & MULCH T =YDS EM EXCELSIOR MAT T= 1.76 Lb /SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT Q= Peak Discharge, (CFS) d = Maximum Depth of Water, (FT) V = Trial Velocity, (FPS) n = Manning's "n" Coefficient B = Bottom Width of Channel, (FT) Z = Side Slope of Channel (Z:1) A = Cross - Sectional Area of Flow, P = Wetted Perimeter of the Flow, (FT) R = Hydraulic Radius, (FT) S = Slope of the Channel, (FT /FT) Q = Trial Discharge, (CFS) W = Top Width of Water in Channel, T= Shear Stress in Lb /SF Y= Wt of Water (62.4 Ib /cf) D= Depth Of Flow S= Slope Of Swale Min. Depth 0.31 FT Bottom Width 0 FT T2p Width 1.86 FT Max. Slope 9.09% Side Slopes 3 :1 uriling EM (DEHNR, 1988, DEHNR, 1993) at Min. Depth 1qJ Diversion Swale No.6 Project Name UniHealth Post -Acute Care Hobbs, Upchurch & Associates, P.A. Consulting Engineers Location Rockingham, North Carolina �tidi7'I I NOTE: MAXIMUM Slope Condition LINING TYPE: Shear Stress: FINISHED DIMENSIONS: REFERENCES: Dec., 2011 HUA Project No. RK1103 Calculated By FDW Checked By TKG Determine the MAXIMUM velocity, V, through the TYPICAL SECTION Use Trial & Error to make the flow depth, d, result with Q = Q10 10 -YEAR Qio = CIA Top Width 3.36 FT C= 0.65 Calculations based on 5 minutes ToC. 1= 8.05 Q,o: 1.9 cis A= 0.37 The velocity of the water entering a maintained veg swale must be <5 ft/s; d = 0.560 FT A = 0.94 FT "2 P = 3.54 FT n = 0.030 (DEHNR, 1993) R= 0.27 B = 0 FT Q = 1.9 CFS Z = 3 :1 V= 2.05 FPS S = 0.0100 FT /FT W= 3.36 FT LINING EM S &M SEED & MULCH T =YDS EM EXCELSIOR MAT T= 0.35 LbISF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT Q= Peak Discharge, (CFS) d = Maximum Depth of Water, (FT) V = Trial Velocity, (FPS) n = Manning's "n" Coefficient B = Bottom Width of Channel, (FT) Z = Side Slope of Channel (Z:1) A = Cross - Sectional Area of Flow, P = Wetted Perimeter of the Flow, (FT) R = Hydraulic Radius, (FT) S = Slope of the Channel, (FT /FT) Q = Trial Discharge, (CFS) W = Top Width of Water in Channel, T= Shear Stress in Lb /SF Y= Wt of Water (62.4 Ib /cf) D= Depth Of Flow S= Slope Of Swale Min. Depth 0.56 FT Bottom Width 0 FT Top Width 3.36 FT Max. Slope 1.00% Side Slopes 3 :1 Lining EM (DEHNR, 1988; DEHNR, 1993) at Min. Depth qi I Diversion Swale No.7 Project Name UniHealth Post -Acute Care Hobbs, Upchurch & Associates, P.A. Consulting Engineers Location Rockingham, North Carolina I SOLUTIONS: STORM VD414 MAXIMUM Slope Condition Determine the MAXIMUM velocity, V, through the TYPICAL SECTION Use Trial & Error to make the flow depth, d, result with Q = Q10 10 -YEAR Clio = CIA C= 0.60 Calculations based on 5 minutes ToC. 1= 8.05 Q10: 4.9 cis A= 1.01 Date Dec., 2011 HUA Project No. RK1103 Calculated By FDW Checked By TKG The velocity of the water entering a maintained veg swale must be <5 ft/s d = 0.590 FT A = 1.04 FT "2 n = 0.030 (DEHNR, 1993) B = 0 FT Z= 3 :1 S = 0.0500 FT /FT LINING TYPE: LINING EM Shear Stress: T =YDS 3.54 FT T= 1.84 Lb /SF FINISHED DIMENSIONS: REFERENCES: Q= Peak Discharge, (CFS) d = Maximum Depth of Water, (FT) V = Trial Velocity, (FPS) n = Manning's "n" Coefficient B = Bottom Width of Channel, (FT) Z = Side Slope of Channel (Z:1) P = 3.73 FT R = 0.28 Q = 5.0 CFS V= 4.75 FPS W = 3.54 FT S &M SEED & MULCH EM EXCELSIOR MAT SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT A = Cross - Sectional Area of Flow, P = Wetted Perimeter of the Flow, (FT) R = Hydraulic Radius, (FT) S = Slope of the Channel, (FT /FT) Q = Trial Discharge, (CFS) W = Top Width of Water in Channel, T= Shear Stress in Lb /SF Y= Wt of Water (62.4 Ib/cf) D= Depth Of Flow S= Slope Of Swale Min. Depth 0.59 FT Bottom Width 0 FT Top Width 3.54 FT Max. Slope 5.00% Side SI 3 :1 Lining EM (DEHNR, 1988, DEHNR, 1993) 3t Min. Depth II qJ Hobbs, l ISOLUTIONS: Ia] *I Eel zE-I to] :1IE h & Associates, P.A. Consulting Engineers Diversion Swale No.8 Name UniHealth Post -Acute Care Rockingham, North Carolina Determine the MAXIMUM velocity, V, through the TYPICAL SECTION Use Trial & Error to make the flow depth, d, result with Q = 010 10 -YEAR Qio = CIA C= 0.50 Calculations based on 5 minutes ToC. 1= 8.05 Q10: 0.9 cis A= 0.22 Date Dec., 2011 HUA Project No. RK1103 Calculated By FDW Checked By TKG The velocity of the water entering a maintained veg swale must be <5 ft/s luM d = 0.300 FT A = 0.27 FTA2 Condition 1.8 FT P = 1.90 FT n = 0.030 (DEHNR, 1993) R = 0.14 B = 0 FT Q= 1.0 CFS Z = 3 :1 V= 3.71 FPS S = 0.0750 FT /FT W= 1.80 FT (LINING TYPE: Shear Stress: (TERMINOLOGY: DIMENSIONS: LINING EM S &M SEED & MULCH T =YDS EM EXCELSIOR MAT T= 1.40 Lb /SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT Q= Peak Discharge, (CFS) d = Maximum Depth of Water, (FT) V = Trial Velocity, (FPS) n = Manning's "n" Coefficient B = Bottom Width of Channel, (FT) Z = Side Slope of Channel (Z:1) A = Cross - Sectional Area of Flow, P = Wetted Perimeter of the Flow, (FT) R = Hydraulic Radius, (FT) S = Slope of the Channel, (FT /FT) Q = Trial Discharge, (CFS) W = Top Width of Water in Channel, T= Shear Stress in Lb /SF Y= Wt of Water (62.4 Ib /cf) D= Depth Of Flow S= Slope Of Swale Min. Depth 0.30 FT Bottom Width 0 FT Top Width 1.8 FT Max. Slope 7.50% Side Slopes 3 :1 UnIng EM (DEHNR, 1988, DEHNR, 1993) at Min. Depth Diversion Swale No.9 Project Name UniHealth Post -Acute Care Hobbs, Upchurch & Associates, P.A. Consulting Engineers Location Rockingham, North Carolina ISOLUTIONS: STORM Condition Determine the MAXIMUM velocity, V, through the TYPICAL SECTION Use Trial & Error to make the flow depth, d, result with Q = Q10 10 -YEAR Q10 = CIA C= 0.65 Calculations based on 5 minutes ToC. 1= 8.05 Q10: 1.6 cfs A= 0.31 Date Dec., 2011 HUA Project No. RK1103 Calculated By FDW Checked By TKG The velocity of the water entering a maintained veg swale must be <5 ft/s d = 0.360 FT A = 0.39 FT "2 n = 0.030 (DEHNR, 1993) B = 0 FT Z= 3 :1 S= 0.0750 FT /FT LINING TYPE: LINING EM Shear Stress: T =YDS 2.16 FT T= 1.68 Lb /SF DIMENSIONS: REFERENCES: Q= Peak Discharge, (CFS) d = Maximum Depth of Water, (FT) V = Trial Velocity, (FPS) n = Manning's "n" Coefficient B = Bottom Width of Channel, (FT) Z = Side Slope of Channel (Z:1) P = 2.28 FT R = 0.17 Q = 1.6 CFS V= 4.19 FPS W = 2.16 FT S &M SEED & MULCH EM EXCELSIOR MAT SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT A= Cross - Sectional Area of Flow, P = Wetted Perimeter of the Flow, (FT) R = Hydraulic Radius, (FT) S = Slope of the Channel, (FT /FT) Q = Trial Discharge, (CFS) W = Top Width of Water in Channel, T= Shear Stress in Lb /SF Y= Wt of Water (62.4 Ib /cf) D= Depth Of Flow S= Slope Of Swale Min. Depth 0.36 FT Bottom Width 0 FT Top Width 2.16 FT Max. Slops 7.50% Side Sio 3 :1 Unity EM (DEHNR, 1988, DEHNR, 1993) at Min. Depth mill Diversion Swale No.10 ru) Project Name UniHealth Post -Acute Care Hobbs, Upchurch & Associates, P.A. Consulting Engineers Location Rockingham, North Carolina STORM NOTE: MAXIMUM Slope Condition iTYPE: Stress: INOLOGY: IFINISHED DIMENSIONS: REFERENCES: Dec., 2011 HUA Project No. RK1103 Calculated By FDW Checked By TKG Determine the MAXIMUM velocity, V, through the TYPICAL SECTION Use Trial & Error to make the flow depth, d, result with Q = Q10 10 -YEAR Qio = CIA Yop Wldth 2.4 FT C= 0.65 Calculations based on 5 minutes ToC. I= 8.05 010: 2.1 cfs A= 0.40 The velocity of the water entering a maintained veg Swale must be <5 ft/s d = 0.400 FT A= 0.48 FT "2 P = 2.53 FT n = 0.030 (DEHNR, 1993) R = 0.19 B = 0 FT Q = 2.2 CFS Z = 3 :1 V= 4.49 FPS S = a 0750 FT /FT W = 2.40 FT LINING EM S &M SEED & MULCH T =YDS EM EXCELSIOR MAT T= 1.87 Lb /SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT Q= Peak Discharge, (CFS) d = Maximum Depth of Water, (FT) V = Trial Velocity, (FPS) n = Manning's "n" Coefficient B = Bottom Width of Channel, (FT) Z = Side Slope of Channel (Z:1) A = Cross - Sectional Area of Flow, P = Wetted Perimeter of the Flow, (FT) R = Hydraulic Radius, (FT) S = Slope of the Channel, (FT /FT) Q = Trial Discharge, (CFS) W = Top Width of Water in Channel, T= Shear Stress in Lb /SF Y= Wt of Water (62.4 Ib /cf) D= Depth Of Flow S= Slope Of Swale Min. De tl1 0.40 FT Bottom Wldth 0 FT Yop Wldth 2.4 FT Max. Slope 7.50% Slide Slopes 3 :1 Lining EM (DEHNR, 1988, DEHNR, 1993) at Min. Depth Project Name Riprap Dissipater #1 Date Uni- Health Post -Acute Care @ FES 6 Dec., 2011 HUA Project No. Location V� Hobbs Upchurch Associates RK1103 Rockingham 1"J engineering I planning I surveying Calculated B North Carolina 800.849.1861 . www.hobbsupchurch.com FDW Charlotte . Wilmington . Nags Head . Southern Pines Checked By SUPERIOR PERFORMANCE THROUGH INNOVATIVE DESIGN JEH (STORM DESIGN: 10 Year BACKGROUND: Use the E &S Control Planning & Design Manual, Section 8.06. PREFERENCE: (NCDEHNR, 1993) Step 1. Minimum Tailwater Condition Step 2. D -o = 24 in. Pipe diameter in inches D -o = 2.00 ft. Pipe diameter in feet Q -10 = 8.40 cfs Pipe outlet (from drainage calculations) d -50 = 0.4 ft. from Figure 8.06 a L -a = 13 ft. from Figure 8.06 a Step 3. Step 4. Step 5. 3 *D -o = 6.00 ft. W = 15.00 ft. d -max 0.60 ft. d -max 7 in. Thickness = 0.90 ft. Thickness = 11 in. IDESIGN DIMENSIONS: 3 times the outlet pipe diameter Pipe diameter + Apron length Maximum Stone Diameter (1.5 *d -50) in inches Maximum Stone Diameter (1.5 *d -50) in feet Min. Apron Thickness With Filter Fabric (1.5 *d -max) in feet Min. Apron Thickness With Filter Fabric (1.5 *d -max) in inches Apron Dimensions Riprap Class Length Width 3 *D -o I Thick 13 15 6 241n. 1 Q10 = 10 -Year Design Storm, Peak Discharge, (cfs) D -o = Pipe Diameter, (in. & ft.) d -50 = Mean Stone Diameter of Rip -Rap, (ft.) L -a = Length of Rip -Rap Apron, (ft.) 3 *D -o = Width of Rip -Rap Apron @ Pipe Outlet, (ft.) W = Width of Rip -Rap Apron @ End of Apron, (ft.) d -max = Maximum Stone Diameter of Rip -Rap, (ft. & in.) Thickness = Thickness of Rip -Rap Apron With Filter Fabric, (ft. &in.) Project Name Riprap Dissipator #2 Date Uni- Health Post -Acute Care @ FES 8 Dec., 2011 HUA Project No. Location Hobbs Upchurch Associates RK1103 ki Rocngham ' engineering I planning I surveying Calculated B North Carolina 800.849.1861 . www.hobbsupchurch.com FDW Charlotte . Wilmington . Nags Head . Southern Pines Checked By SUPERIOR PERFORMANCE THROUGH INNOVATIVE DESIGN .EA ISTORM DESIGN: 10 Year BACKGROUND: Use the E &S Control Planning & Design Manual, Section 8.06. REFERENCE: (NCDEHNR, 1993) Step 1. Minimum Tailwater Condition Step 2. D -o = 15 in. Pipe diameter in inches D -o = 1.25 ft. Pipe diameter in feet Q -10 = 8.40 cis Pipe outlet (from drainage calculations) d -50 = 0.2 ft. from Figure 8.06 a L -a = 8 ft. from Figure 8.06 a Step 3. Step 4. Step 5. 3 *D -o = 3.75 ft. W = 9.25 ft. d -max 0.30 ft. d -max 4 in. Thickness = 0.45 ft. Thickness = 5 in. IDESIGN DIMENSIONS: 3 times the outlet pipe diameter Pipe diameter + Apron length Maximum Stone Diameter (1.5 *d -50) in inches Maximum Stone Diameter (1.5 *d -50) in feet Min. Apron Thickness With Filter Fabric (1.5 *d -max) in feet Min. Apron Thickness With Filter Fabric (1.5 *d -max) in inches Apron Dimensions Riprap Class Length Width 3 *D -o Thick 8 10 4 121 n. A INOLOGY: Q10 = 10 -Year Design Storm, Peak Discharge, (cfs) D -o = Pipe Diameter, (in. & ft.) d -50 = Mean Stone Diameter of Rip -Rap, (ft.) L -a = Length of Rip -Rap Apron, (ft.) 3 *D -o = Width of Rip -Rap Apron @ Pipe Outlet, (ft.) W = Width of Rip -Rap Apron @ End of Apron, (ft.) d -max = Maximum Stone Diameter of Rip -Rap, (ft. & in.) Thickness = Thickness of Rip -Rap Apron With Filter Fabric, (ft. &in.) Project Name Riprap Dissipator #3 Date Uni- Health Post -Acute Care @ #ES 24 Dec., 2011 HUA Project No. Location �� Hobbs Upchurch Associates RK1103 Rockingham ' engineering I planning I surveying Calculated B North Carolina 800.849.1861 • www.hobbsupchurch.com FDW Chadotte . Wilmington . Nags Head . Southern Pines Checked By SUPERIOR PERFORMANCE THROUGH INNOVATIVE DESIGN JEH ISTORM DESIGN: 10 Year BACKGROUND: Use the E &S Control Planning & Design Manual, Section 8.06. REFERENCE: (NCDEHNR, 1993) Step 1. Minimum Tailwater Condition Step 2. D -o = 24 in. Pipe diameter in inches D -o = 2.00 ft. Pipe diameter in feet Q -10 = 11.67 cis Pipe outlet (from drainage calculations) d -50 = 0.4 ft. from Figure 8.06 a L -a = 13 ft. from Figure 8.06 a Step 3. Step 4. Step 5. 3 *D -o = 6.00 ft. W = 15.00 ft. d -max 0.60 ft. d -max 7 in. Thickness = 0.90 ft. Thickness = 11 in. IDESIGN DIMENSIONS- 3 times the outlet pipe diameter Pipe diameter + Apron length Maximum Stone Diameter (1.5 *d -50) in inches Maximum Stone Diameter (1.5 *d -50) in feet Min. Apron Thickness With Filter Fabric (1.5 *d -max) in feet Min. Apron Thickness With Filter Fabric (1.5 *d -max) in inches Apron Dimensions Rlprap Class Length Width 3 -D -o Thick 13 15 6 241n. 1 TERMINOLOGY: Q10 = 10 -Year Design Storm, Peak Discharge, (cfs) D -o = Pipe Diameter, (in. & ft.) d -50 = Mean Stone Diameter of Rip -Rap, (ft.) L -a = Length of Rip -Rap Apron, (ft.) 3 *D -o = Width of Rip -Rap Apron @ Pipe Outlet, (ft.) W = Width of Rip -Rap Apron @ End of Apron, (ft.) d -max = Maximum Stone Diameter of Rip -Rap, (ft. & in.) Thickness = Thickness of Rip -Rap Apron With Filter Fabric, (ft. &in.) Project Name Riprap Dissipator #4 Date Uni- Health Post -Acute Care @ Wetlands #1 Outlet Riser Dec., 2011 HUA Project No. Location 141 Hobbs Upchurch Associates iRK1103 Rockingham engineering I planning I surveying Calculated B North Carolina 800.849.1861 . www.hobbsupchurch.com FDW Charlotte . Wilmington . Nags Head . Southern Pines Checked By SUPERIOR PERFORMANCE THROUGH INNOVATIVE DESIGN JEH ISTORM DESIGN: 10 Year BACKGROUND: Use the E &S Control Planning & Design Manual, Section 8.06. PREFERENCE: (NCDEHNR, 1993) Step 1. Minimum Tailwater Condition Step 2. D -o = 24 in. Pipe diameter in inches 3'D -o D -o = 2.00 ft. Pipe diameter in feet 6 Q -10 = 25.89 ofs Pipe outlet (from drainage calculations) d -50 = 0.5 ft. from Figure 8.06 a L -a = 18 ft. from Figure 8.06 a Step 3. 3 *D -o = 6.00 ft. 3 times the outlet pipe diameter W = 20.00 ft. Pipe diameter + Apron length Step 4. d -max 0.75 ft. Maximum Stone Diameter (1.5 *d -50) in inches d -max 9 in. Maximum Stone Diameter (1.5 *d -50) in feet Step 5. Thickness = 1.13 ft. Min. Apron Thickness With Filter Fabric (1.5 *d -max) in feet Thickness = 14 in. Min. Apron Thickness With Filter Fabric (1.5 *d -max) in inches !DESIGN DIMENSIONS: Apron Dimensions Rlprap Class Length Width 3'D -o Thick 18 20 6 24in. 1 Q10 = 10 -Year Design Storm, Peak Discharge, (cfs) D -o = Pipe Diameter, (in. & ft.) d -50 = Mean Stone Diameter of Rip -Rap, (ft.) L -a = Length of Rip -Rap Apron, (ft.) 3 *D -o = Width of Rip -Rap Apron @ Pipe Outlet, (ft.) W = Width of Rip -Rap Apron @ End of Apron, (ft.) d -max = Maximum Stone Diameter of Rip -Rap, (ft. & in.) Thickness = Thickness of Rip -Rap Apron With Filter Fabric, (ft. &in.) Project Name Riprap Dissipator #5 Date Uni- Health Post -Acute Care @ Wetlands #2 Outlet Riser Dec., 2011 HUA Project No. Location U� Hobbs Upchurch Associates RK1103 Rockingham 1'7 engineering I planning I surveying Calculated B North Carolina 800.849.1861 . www.hobbsupchurch.com FDW Charlotte . Wilmington . Nags Head . Southern Pines Checked By SUPERIOR PERFORMANCE THROUGH INNOVATIVE DESIGN .EH DESIGN: 10 Year BACKGROUND: Use the E &S Control Planning & Design Manual, Section 8.06. PREFERENCE: (NCDEHNR, 1993) Step 1. Minimum Tailwater Condition Step 2. D -o = 18 in. Pipe diameter in inches D -o = 1.50 ft. Pipe diameter in feet Q -10 = 8.15 cis Pipe outlet (from drainage calculations) d -50 = 0.3 ft. from Figure 8.06 a L -a = 10 ft. from Figure 8.06 a Step 3. Step 4. Step 5. 3 *D -o = 4.50 ft. W = 11.50 ft. d -max 0.45 ft. d -max 5 in. Thickness = 0.68 ft. Thickness = 8 in. IDESIGN DIMENSIONS: 3 times the outlet pipe diameter Pipe diameter + Apron length Maximum Stone Diameter (1.5 *d -50) in inches Maximum Stone Diameter (1.5 *d -50) in feet Min. Apron Thickness With Filter Fabric (1.5 *d -max) in feet Min. Apron Thickness With Filter Fabric (1.5 *d -max) in inches Apron Dimensions Riprap Class Length Width 3 -D -o Thick 10 12 5 181n. B Q10 = 10 -Year Design Storm, Peak Discharge, (cfs) D -o = Pipe Diameter, (in. & ft.) d -50 = Mean Stone Diameter of Rip -Rap, (ft.) L -a = Length of Rip -Rap Apron, (ft.) 3 *D -o = Width of Rip -Rap Apron @ Pipe Outlet, (ft.) W = Width of Rip -Rap Apron @ End of Apron, (ft.) d -max = Maximum Stone Diameter of Rip -Rap, (ft. & in.) Thickness = Thickness of Rip -Rap Apron With Filter Fabric, (ft. &in.) Project Name Riprap Dissipatof #6 Date Uni- Health Post -Acute Care @ Culvert 2 Dec., 2011 HUA Project No. Location Hobbs Upchurch Associates RK1103 Rockingham engineering I planning I surveying Calculated B North Carolina 800.849.1861 a www.hobbsupchurch.com FDW Charlotte . Wilmington . Nags Head . Southern Pines Checked By SUPERIOR PERFORMANCE THROUGH INNOVATIVE DESIGN JEH (STORM DESIGN: 10 Year BACKGROUND: Use the E &S Control Planning & Design Manual, Section 8.06. PREFERENCE: (NCDEHNR, 1993) Step 1. Minimum Tailwater Condition Step 2. D -o = 36 in. Pipe diameter in inches D -o = 3.00 ft. Pipe diameter in feet Q -10 = 37.32 cfs Pipe outlet (from drainage calculations) d -50 = 0.2 ft. from Figure 8.06 b L -a = 13 ft. from Figure 8.06 b Step 3. Step 4. Step 5. 3 *D -o = 9.00 ft. W = 16.00 ft. d -max 0.30 ft. d -max 4 in. Thickness = 0.45 ft. Thickness = 5 in. DIMENSIONS: 3 times the outlet pipe diameter Pipe diameter + Apron length Maximum Stone Diameter (1.5 *d -50) in inches Maximum Stone Diameter (1.5 *d -50) in feet Min. Apron Thickness With Filter Fabric (1.5 *d -max) in feet Min. Apron Thickness With Filter Fabric (1.5 *d -max) in inches Apron Dimensions Rlprap Class Length Wldth 3*D-o Thick 13 16 9 12in. A Use Class B Instead TERMINOLOGY: Q10 = 10 -Year Design Storm, Peak Discharge, (cfs) D -o = Pipe Diameter, (in. & ft.) d -50 = Mean Stone Diameter of Rip -Rap, (ft.) L -a = Length of Rip -Rap Apron, (ft.) 3 *D -o = Width of Rip -Rap Apron @ Pipe Outlet, (ft.) W = Width of Rip -Rap Apron @ End of Apron, (ft.) d -max = Maximum Stone Diameter of Rip -Rap, (ft. & in.) Thickness = Thickness of Rip -Rap Apron With Filter Fabric, (ft. &in.) SOILS DATA USDA United States Department of Agriculture o FRCS Natural Resources Conservation Service A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for Richmond County, North Carolina Uni- Health Post -Acute December 19, 2011 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http: / /soils.usda.gov /sqi /) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (http: // offices .sc.egov.usda.gov /locator /app? agency =nres) or your NRCS State Soil Scientist (http: / /soils.usda.gov /contact/ state offices /). Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Soil Data Mart Web site or the NRCS Web Soil Survey. The Soil Data Mart is the data storage site for the official soil survey information. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means K for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720 -2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250 -9410 or call (800) 795 -3272 (voice) or (202) 720 -6382 (TDD). USDA is an equal opportunity provider and employer. 3 Contents Preface...................................................................................... ..............................2 HowSoil Surveys Are Made .................................................... ..............................5 SoilMap .................................................................................... ..............................7 SoilMap .................................................................................. ..............................8 Legend.................................................................................... ..............................9 MapUnit Legend ................................................................... .............................10 MapUnit Descriptions ........................................................... .............................10 Richmond County, North Carolina ..................................... .............................12 AcB —Ailey loamy sand, 0 to 8 percent slopes ............... .............................12 CaC— Candor and Wakulla soils, 8 to 15 percent slopes ...........................13 References............................................................................... .............................15 4 How Soil Surveys Are Made Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area. They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses. Soil scientists observed the steepness, length, and shape of the slopes; the general pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock. They observed and described many soil profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity. Currently, soils are mapped according to the boundaries of major land resource areas (MLRAs). MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically consist of parts of one or more MLRA. The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a soil scientist develops a concept, or model, of how they were formed. Thus, during mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape. Commonly, individual soils on the landscape merge into one another as their characteristics gradually change. To construct an accurate soil map, however, soil scientists must determine the boundaries between the soils. They can observe only a limited number of soil profiles. Nevertheless, these observations, supplemented by an understanding of the soil- vegetation - landscape relationship, are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries. Soil scientists recorded the characteristics of the soil profiles that they studied. They noted soil color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distribution of plant roots, reaction, and other features that enable them to identify soils. After describing the soils in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units). Taxonomic classes are concepts. Each taxonomic class has a set of soil characteristics with precisely defined limits. The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile. After the soil scientists classified and named the soils in the survey area, they compared the 5 Custom Soil Resource Report individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research. The objective of soil mapping is not to delineate pure map unit components; the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components and /or miscellaneous areas in predictable proportions. Some components may be highly contrasting to the other components of the map unit. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, onsite investigation is needed to define and locate the soils and miscellaneous areas. Soil scientists make many field observations in the process of producing a soil map. The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist. Observations are made to test and refine the soil - landscape model and predictions and to verify the classification of the soils at specific locations. Once the soil - landscape model is refined, a significantly smaller number of measurements of individual soil properties are made and recorded. These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, salt, and other components. Properties of each soil typically vary from one point to another across the landscape. Observations for map unit components are aggregated to develop ranges of characteristics for the components. The aggregated values are presented. Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties. While a soil survey is in progress, samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests. Soil scientists interpret the data from these analyses and tests as well as the field- observed characteristics and the soil properties to determine the expected behavior of the soils under different uses. Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management. Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs. Data are assembled from other sources, such as research information, production records, and field experience of specialists. For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil. Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time, but they are not predictable from year to year. For example, soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date. After soil scientists located and identified the significant natural bodies of soil in the survey area, they drew the boundaries of these bodies on aerial photographs and identified each as a specific map unit. Aerial photographs show trees, buildings, fields, roads, and rivers, all of which help in locating boundaries accurately. I Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit. VA 34'56'0" 34° 56 51" Custom Soil Resource Report Soil Map Map Scale: 1:1,3201 printed on As¢e (8.5" x 11 ") sheet. °e e ° N Meters a A 0 10 20 40 60 N Feet 0 50 100 200 300 34° 56 0" 34° 55' 51" O CL m m U 7 O U) O Q' O Uc E O 0 U O C CD C Vpi Of v ° 'O w m L N w f0 w p> w m N -p w N O 'O c Co U U Z N N m co O O C E L w N co U O c6 V) 7 C O O O) = Y N Z CL m m �o w ° 1 m L °wa o O E a m E m e U Urn 0 co o w U) `o w w m 0 Z N L E 5 c0 3 w o �E n c �Q Z C L o d N O m m aw m E O pZ p ;" L 3 m 0) a.- O o m m, O m aa Z O .w d cc N oN E O c d E>° C d p T C C N w := 2•- Z E h N ow m w cp d a awva 0 5 D ° d w) 3 m CL h E aw ao m� Z m Lw c._ M ° m > cm N O�L� C C w C co Q O 2. m N1� NQ Q O-° N O O 'O I-� ooO N 'y O >` N U) �_ Ui -p j C m >` N f0 p. o d H. CJ w Co V% E d CL m E Ol r y U O p.0 p N V) > _w 4� ) F w E ah a E 0 U) 0 I-L U)U ) o H 0 o Cl. w C W U w N L (n w 'O w y N L IL T C L L N O 0 z > N 3 m c O o _ U m V) C 5 J m C Z W ° y c� LL A ` O 0 0 LL O ] � (7 a° m� 3 � l Lt W J CL o Q o a� 0. ID N 0,/ .4 y 7 d m _ o G E N C j f a Q a W O_ d a 0 > a tail m C C. V 0 m _Q po a LL O yy > W Y C O m C N O . m (n o m U U 0 0 > h O V) m C (n (n V) V) O V) (n Cl) m a c � o m ®x -4 o o > +.. ip o.a mo W m w O a N Q W Custom Soil Resource Report Map Unit Legend AcB Ailey loamy sand, 0 to 8 percent 0.2 2.9% slopes CaC Candor and Wakulla soils, 8 to 15 5.9 97.1% percent slopes Totals for Area of Interest 6.1 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If 10 Custom Soil Resource Report intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha -Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha - Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. 11 Custom Soil Resource Report Richmond County, North Carolina AcB —Ailey loamy sand, 0 to 8 percent slopes Map Unit Setting Elevation: 160 to 660 feet Mean annual precipitation: 38 to 52 inches Mean annual air temperature: 61 to 70 degrees F Frost -free period. 210 to 245 days Map Unit Composition Ailey and similar soils: 85 percent Minor components: 5 percent Description of Ailey Setting Landform: Low hills Landform position (two- dimensional): Summit Landform position (three- dimensional): Crest Down -slope shape: Convex Across -slope shape: Convex Parent material: Sandy and loamy marine deposits Properties and qualities Slope: 0 to 8 percent Depth to restrictive feature: 26 to 60 inches to fragipan; 40 to 80 inches to dense material Drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately low to moderately high (0.06 to 0.20 in /hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water capacity: Very low (about 2.3 inches) Interpretive groups Land capability (nonirrigated): 3s Typical profile 0 to 5 inches: Loamy sand 5 to 24 inches: Loamy sand 24 to 36 inches: Sandy clay loam 36 to 50 inches: Sandy clay loam 50 to 80 inches: Sandy loam Minor Components Bibb, undrained Percent of map unit. 3 percent Landform: Flood plains Landform position (two- dimensional): Toeslope Down -slope shape: Concave Across -slope shape: Linear 12 Custom Soil Resource Report Johnston, undrained Percent of map unit: 2 percent Landform: Flood plains Down -slope shape: Concave Across -slope shape: Linear CaC— Candor and Wakulla soils, 8 to 15 percent slopes Map Unit Setting Elevation: 160 to 660 feet Mean annual precipitation: 38 to 52 inches Mean annual air temperature: 61 to 70 degrees F Frost -free period: 210 to 245 days Map Unit Composition Candor and similar soils: 40 percent Wakulla and similar soils: 40 percent Minor components: 5 percent Description of Wakulla Setting Landform: Low hills Landform position (two- dimensional): Shoulder Landform position (three- dimensional): Crest Down -slope shape: Convex Across -slope shape: Convex Parent material: Sandy and loamy marine deposits and /or eolian sands Properties and qualities Slope: 8 to 15 percent Depth to restrictive feature: More than 80 inches Drainage class: Somewhat excessively drained Capacity of the most limiting layer to transmit water (Ksat): High to very high (1.98 to 19.98 in /hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water capacity: Very low (about 2.7 inches) Interpretive groups Land capability (nonirrigated): 4s Typical profile 0 to 7 inches: Sand 7 to 24 inches: Sand 24 to 42 inches: Loamy sand 42 to 85 inches: Sand 13 Custom Soil Resource Report Description of Candor Setting Landform: Low hills Landform position (two- dimensional): Shoulder Landform position (three- dimensional): Crest Down -slope shape: Convex Across -s lope shape: Convex Parent material: Sandy and loamy marine deposits and /or eolian sands Properties and qualities Slope: 8 to 15 percent Depth to restrictive feature: More than 80 inches Drainage class: Somewhat excessively drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 1.98 in /hr) Depth to water table: About 72 to 78 inches Frequency of flooding: None Frequency of ponding: None Available water capacity. Very low (about 2.9 inches) Interpretive groups Land capability (nonirrigated): 4s Typical profile 0 to 8 inches: Sand 8 to 26 inches: Sand 26 to 38 inches: Loamy sand 38 to 62 inches: Sand 62 to 80 inches: Sandy clay loam Minor Components Bibb, undrained Percent of map unit. 3 percent Landform: Flood plains Landform position (two- dimensional): Toeslope Down -s lope shape: Concave Across -slope shape: Linear Johnston, undrained Percent of map unit. 2 percent Landform: Flood plains Down -slope shape: Concave Across -slope shape: Linear 14 References American Association of State Highway and Transportation Officials (AASHTO). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition. American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487 -00. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep -water habitats of the United States. U.S. Fish and Wildlife Service FWS /OBS- 79/31. Federal Register. July 13, 1994. Changes in hydric soils of the United States. Federal Register. September 18, 2002. Hydric soils of the United States. Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric soils in the United States. National Research Council. 1995. Wetlands: Characteristics and boundaries. Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S. Department of Agriculture Handbook 18. http: / /soils.usda.gov/ Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http: / /soils.usda.gov/ Soil Survey Staff. 2006. Keys to soil taxonomy. 10th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http: / /soils.usda.gov/ Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section. United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y -87 -1. United States Department of Agriculture, Natural Resources Conservation Service. National forestry manual. http: / /soils.usda.gov/ United States Department of Agriculture, Natural Resources Conservation Service. National range and pasture handbook. http: / /www.giti.nres.usda.gov/ United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430 -VI. http: / /soils.usda.gov/ United States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. hftp://soils.usda.gov/ 15 Custom Soil Resource Report United States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. 16 MISCELLANEOUS MAPS/DATA �;��� p }it ��� �•�xp i# teip i p� rs � §� ; � � � `z ¢ �:s :t' it M-1 ad Y a, 4 5 e U e o3b if Hill* '— jiiytE EE f #jt tia c tilifii4liP_!9 t btA #i1` a #t it;i .a #- s {lsftssEgt ts¢iti} a8 !e b xP i #�PtiifE� s g 1 0 U US � . JJJJ oilip .. _ .. -.- 1E pi E�? ''_ �aaiE:lliii# P53� il�i6 y #i f a Ptli Ei; t� fa. f E`' iit }it a Jill 0 r �a Ei j P ►i[[t� z � tP;< fjt a 6P't }� g�i�P18I�Eji a }? i5ii3 ; #� #ep 12t1 MHz P¢' fill Pd z ii f ,tc �a ' Itai ilia! 11iiiii11 Ila � Ef 8f�� :Fia RLRG gc�cad9S3I 9� fa ;t e Ft sQ aae e°YR - &RAF�pp �` P4 9898 ii :z�`a3x3': o' $pp i it $ 8a�yi�Bf996��9S�a� � of �c:69�995999H9E�o� y #i f a Ptli Ei; t� fa. f E`' iit }it a Jill 0 r �a Ei j P ►i[[t� z � tP;< fjt a 6P't }� g�i�P18I�Eji a }? i5ii3 ; #� #ep 12t1 MHz P¢' fill Pd z ii f ,tc �a ' Itai ilia! 11iiiii11 Ila � Ef 8f�� ` U.S. DEPARTMENT GEOLCG SURVEY IOR n.rrrr HAMLET R QUADRANG CMOUT SCALE 1:u ODD n _r.arw......� HAMLET , NC mio Peniut Number (to be prot Wed b} DH Qj Drainage Area Number j j 2 T Stormwater Wetland Operation and Maintenance Agreement I will keep a maintenance record on this BMP Tlus maintenance record will be kept in a log ui a known set location Any deficient BMP elements noted in the inspection will be corrected, repaned or replaced immediately These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP Important maintenance piocedutes — Iintnediately following conshuction of the stormwater wetland, bi weekly i nspechons will be conducted and wetland plants will be watered bi weekly until vegetation becomes established (commonly six weeks) — No portion of the stormwater wetland will be fertilized after the first initial fertilization that is tequued to establish the wetland plants — Stable groundcover will be maintained m the drainage area to reduce the sediment load to the wetland — Once a year a dain safety expei t should inspect the embankment After the stormwater wetland is established, I will inspect it monthly and within 24 hours after every storm event greater than 10 inches (or IS inches if in a Coastal County) Records of operation and maintenance will be kept un a known set location and will be available upon request Inspection activities shall be peifoinied as follows Any problems that ale found shall be iepaired iinmediately Ba rm-w` ,',W' TMY 4n eleinenf, N _ -'�- W.tK�y'A'gt4'�' 9"# '� #' I',otntlal ibb 1; `�" r �-- a_-a S FPZ»,1. lirlv�i�Villretfietatedhe, robl� Entire BMP Trash debi is is resent Remove the trash debris Perimeter of wetland Areas of bare sod and /or erosive Regrade the soil if necessary to remove the gullies have formed gully and then plant a growid cover and water until it is established Provide lime and a one -time fertilizer application Vegetation is too shoe t or too long Maintain vegetation at air appropriate her ht Inlet device pipe or swale The pipe is clogged (if applicable) Unclog the pipe Dispose of the sedmient offsite The pipe is cracked or otherwise Replace the pipe damaged if applicable) Erosion is occurring m the swale (if applicable) Regiade the swale if necessary to smooth it over and provide erosion control devices such as remforced turf matting or nprap to avoid future problems with erosion Forni SW401 Wetland O &M Rev 4 Page 1 of 3 Pernn( Number (to be pros ided b) D1; Q) OWtelemlont t Totentiali robl4'In 'e,7 * � r z llib'w IlWiilar�irt "diate the `�robll m � � � Forebay Sediment has accumulated in the Search for the source of the sediment and forebay to a depth that umhibits the remedy the problem if possible Remove forebay from functioning well the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP Erosion has occurred Provide additional erosion protection such as reumforced turf matting or iiprap if needed to prevent future erosion problems Weeds are present Remove the weeds preferably by hand If a pesticide is used wipe it on the plants rather than s ra in Deep pool shallow water Algal growth covers over 50% of the Consult a professional to remove and and shallow land areas deep of and shallow water areas control the algal growth Cattails phragnutes or other invasive Remove invasives by physical removal or plants cover 50% of the deep pool and by wiping them with pesticide (do not shallow water areas spray) - consult a professional Shallow land remains flooded more Unclog the outlet device immediately than 5 days after a storm event Plants are dead diseased or dying Determine the source of the problem soils hydrology disease etc Remedy the problem and replace plants Provide a one -time fertilizer application to establish the ground cover if necessary Best professional practices show that Prune according to best professional pruning is needed to maintain optimal practices plant health Sediment has accumulated and Search for the source of the sediment and reduced the depth to 75% of the remedy the problem if possible Remove original design depth of the deep the sediment and dispose of it um a location pools where it will not cause impacts to streams or the BMP Embankment A tree has started to grow on the Consult a dam safety specialist to remove embankment the tree An annual inspection by appropriate Make all needed repairs professional shows that the emb ,inkment needs re au Evidence of muskrat or beaver activity Consult a professional to iemove muskrats is present or beavers Mieropool Sediment has accumulated and Search for the source of the sediment and reduced the depth to 75% of the remedy the problem if possible Remove original design depth the sediment and dispose of it in a location wheie it will not cause impacts to streams of the BMP Outlet device Clogging has occurred Clean out the outlet device Dispose of the sediment off site The outlet device is damaged Repair of replace the outlet device Receiving water Erosion or other signs of damage have Contact the NC Division of Water Quality occurred at the outlet 401 Oversight Unit at 919 7331786 Forth SW401 Wetland O &M Rev 4 Page 2 of 3 Permit Number (to be poi ided by Dif Q) 1 acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above I agree to notify DWQ of any problems with the system or pilot to any changes to the system or responsible party Agtect name Unihealth Post Acute Care, Rockingham. LLC BMP di atnage at ea nimibei #I and #2 Print Title Addr Phon Signe Date Ct Note The legally rc%ponsible party should not be a homeowners association unless more than 50% of the lots have been sold and a iestdcnt of the subdivi%ion has, been named the president � --PaL-Xj -) , a Notary Public for the State of County of CA(Ci I t1(h tt: , do hereby certify that (I 1 c` xis personally appealed before me this 09-1 day of )(kf l O_d� and acknowledge the due execution of the foigoing stormwater wetland maintenance requirements Witness my hand and official seal, SEAL Notary Public Gvmrwi, -vrg1b My commission expires MyCOmmission Expues Oi.a to MS Form SW401 Wetland O &M Rev 4 Page 3 of 3