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HomeMy WebLinkAbout19930501 Ver 2_More Info Received_20091112PSWK WDICKSON community infrastructure consultants November 10, 2009 Cyndi Karoly, Supervisor 401 Oversight/Express Review Permitting Unit NCDENR, Division of Water Quality 1650 Mail Service Center Raleigh, NC 27699-1650 Re: Macon County Airport Expansion - AFTER-THE-FACT Little Tennessee River [040401, 2-27, Cl DWQ Project # 93-0501, Ver. 2 Dear Ms. Karoly, r= 6:Z1, NOV 1 L 2009 DEW - WATER QUALITY WERAM AND STORMWATIA BRANCH This letter is in response to your request for additional information for the above mentioned project. Please find the attached SMP that removes a minimum of 85 percent TSS from the stormwater generated by this project. For each proposed BMP you will find a completed BMP Supplement Form, with all the required items. Do not hesitate to contact me if you have any questions or need any additional information. Sincerely, Greg Kershaw, PE Project Engineer W.K. DICKSON & CO., INC. Iransportation . Miter Resomco, . Urban Development . Geomatics Permit Number: (to be provided by DWQ) OF W R 7FR V*A O? pG HCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM GRASSED SWALE SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 111) must also be filled out, printed and submitted along with all of the required information. ilio Pon Wo, Project name Runway 7 600' Extension Contact name Eric Rysdon, PE, W.K. Dickson & Co., Inc. Phone number 704-334-5348 Date November 2, 2009 Drainage area number 5 (Grassed Swale No 1) Site Characteristics Drainage area 204,732.00 ft2 Impervious area 33,977.00 ft2 Percent impervious 16.6%% Design rainfall depth inch Q (q"'? Peak Flow Calculations 10-yr storm runoff depth 11.28 in 10-yr storm intensity 4.73 in/hr Post-development 10-yr storm peak flow 10.00 ft3/sec Velocity Maximum non-erosive velocity (peak 10-year storm) 5,50 ft/sec Soil characteristics (enter 'Y' below) Sand/silt (easily erodible) Clay mix (erosion resistant) X Grass Type (enter "x" below) Bermuda Tall fescue X Bahiagrass Kentucky bluegrass Grass-legume mixture Swale type: Fill out one of the options below: Option 1: Curb Outlet Swale: (Y or N) Maximum velocity Side slopes :1 Swale length ft Option 2: Swale Seeking Pollutant Credit ("For-Credit" 2: Swale Seeking Pollutant Credit("For-Credit" Swale) Y (Y or N) Maximum velocity for 10-yr storm 1.00 ft/sec OK Side slopes 5.00 :1 OK Swale length 300.00 ft OK M:?p UUVY L9 No V 1 2 2009 DEMR • WATER 41AUTY WETLVMAM STORMNAI'ER BRANCH Form SW401-Grassed Swale-Rev.4 Parts I and II. Project Design Summary, Page 1 of 2 Permit Number: (to be provided by DWQ) Swale Characteristics Swale Shape: Enter an 'Y' in the appropriate cell below: Trapezoidal Parabolic V-shaped Width of the bottom of the Swale Width of the top of the swale Additional Information is the swale sized for all runoff from ultimate build-out? Is the BMP located in a proposed drainage easement with a recorded access easement to a public Right of Way (ROW)? What is the distance from the bottom of the swale to the SHWT? What is the ground level elevation? What is the elevation of the bottom of the swale? What is the SHWT elevation? What is the longitudinal slope of the swale? What is the depth of freeboard? v o.vu T1 20.40 ft Y (Y or N) OK N (Y or N) Insufficient ROW location, 2.00 ft OK 2,016.00 fmsl 2,014,00 fmsl 2,012,00 fmsl 0.10% 1.06 ft OK OK Form SW401-Grassed Swale-Rev.4 Parts I and II. Project Design Summary, Page 2 of 2 Permit No: (to be assigned by DWQ) Ream T ti NL; Q "tO 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 Sheet No. R Plan sheet 1. Plans (1" = 50' or larger) of the entire site showing: 1/1 - Design at ultimate build-out, - Off-site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Swale dimensions (width, length, depth), - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Grass species, and - Boundaries of drainage easement. Plan sheet 2. Plan details (1" = 50' or larger) for the grassed swale showing: 1/1 Swale dimensions (width, length, depth), - Maintenance access, Proposed drainage easement and public right of way (ROW), Design at ultimate build-out, Grass species, - Off-site drainage (if applicable),and Boundaries of drainage easement. Plan sheet 3. Section view of the grassed swale (1" = 20' or larger) showing: 1/1 - Side slopes, - Longitudinal slope, - Freeboard - Swale dimensions, and - SHWT level(s) 'Y4". See Appendix L See following sheet See following sheet SW401-Grassed Swale-Rev.3 4. Supporting calculations (including maximum velocity calculations for applicable storms) 5. A copy of the signed and notarized operation and maintenance (0&M) agreement. 6. A copy of the deed restrictions (if required). Part III, Page 1 of 1 Required Items Checklist - Justification for Items not included Grassed Swale Off-site drainage (if applicable) - N/A, as it does not flow through the BMP Maintenance access - N/A, property is owned and maintained by Macon County Proposed drainage easement and public right of way(ROW) - NA, property is owned and maintained by Macon County Boundaries of drainage easement - N/A, property is owned and maintained by Macon County 2 Maintenance access - N/A, property is owned and maintained by Macon County Proposed drainage easement and public right of way(ROW) - NA, property is owned and maintained by Macon County Off-site drainage (if applicable) - not applicable as it does not flow through the BMP Boundaries of drainage easement - N/A, property is owned and maintained by Macon County A copy of the signed and notarized operation and maintenance (O&M) - The airport will maintain the proposed BMPs as they are within the Air Operations Area 6 A copy of the deed restrictions (if required) - N/A since the property is owned by the airport and will not be subdivided. Permit Number: (to be provided by DWQ) o? wA r?9 WDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM GRASSED SWALE SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 111) must also be filled out, printed and submitted along with all of the required information. Project name Runway 7 600' Extension Contact name Eric Rysdon, PE, W.K. Dickson & Co., Inc, Phone number 704-334-5348 Date November 2, 2009 Drainage area number 2B (Grassed Swale No 2) Site Characteristics Drainage area 145,490.40 ft2 Impervious area 45,738.00 ft2 Percent impervious 31.4% % Design rainfall depth inch Peak Flow Calculations 10-yr storm runoff depth 10.08 in 10-yr storm intensity 5.81 in/hr Post-development 10-yr storm peak flow 10.48 ft3/sec Velocity Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec Soil characteristics (enter "x" below) Sand/silt (easily erodible) Clay mix (erosion resistant) ` X Grass Type (enter "x" below) Bermuda Tall fescue X Bahiagrass Kentucky bluegrass Grass-legume mixture Swale type: Fill out one of the options below: Option 1: Curb Outlet Swale: (Y or N) Maximum velocity Side slopes :1 Swale length ft Option 2: Swale Seeking Pollutant Credit ("For-Credit" 2: Swale Seeking Pollutant Credit("For-Credit" Swale): Y (Y or N) Maximum velocity for 10-yr storm 0.87 ft/sec OK Side slopes 10.00 :1 OK Swale length 300.00 ft OK Form SW401-Grassed Swale-Rev.4 Parts I and 11 Project Design Summary, Page 1 of 2 Permit Number. (to be provided by DWQ) Swale Characteristics Swale Shape: Enter an "x" in the appropriate cell below: Trapezoidal Parabolic V-shaped Width of the bottom of the swale Width of the top of the swale Additional Information Is the swale sized for all runoff from ultimate build-out? Is the BMP located in a proposed drainage easement with a recorded access easement to a public Right of Way (ROW)? What is the distance from the bottom of the swale to the SHWT? What is the ground level elevation? What is the elevation of the bottom of the swale? What is the SHWT elevation? What is the longitudinal slope of the swale? What is the depth of freeboard? Form SW401-Grassed Swale-Rev.4 X 6.00 ft 32.70 ft Y (Y or N) N (Y or N) 2.00 ft 2,020,00 fmsl 2,018.00 fmsl 2,016.00 fmsl 0.10% 1,16 ft OK Insufficient ROW location. OK OK OK Parts I and II. Project Design Summary, Page 2 of 2 Permit No: (to be assigned by DWQ) a; r «fi 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 C'o - 17It Pagel Plan Sheet No. Plan sheet 1. Plans (1" = 50' or larger) of the entire site showing: 1/1 Design at ultimate build-out, - Off-site drainage (if applicable), Delineated drainage basins (include Rational C coefficient per basin), - Swale dimensions (width, length, depth), Maintenance access, Proposed drainage easement and public right of way (ROW), Grass species, and Boundaries of drainage easement. Plan sheet 2. Plan details (1" = 50' or larger) for the grassed swale showing: 1/1 - Swale dimensions (width, length, depth), - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Design at ultimate build-out, - Grass species, - Off-site drainage (if applicable),and - Boundaries of drainage easement. Plan sheet 3. Section view of the grassed swale (1" = 20' or larger) showing: 1/1 Side slopes, - Longitudinal slope, - Freeboard Swale dimensions, and - SHWT level(s) See Appendix See following sheet See following sheet 4. Supporting calculations (including maximum velocity calculations for applicable storms) 5. A copy of the signed and notarized operation and maintenance (0&M) agreement. 6. A copy of the deed restrictions (if required). SW401-Grassed Swale-Rev.3 Part III, Page 1 of 1 Required Items Checklist - Justification for Items not included Grassed Swale Off-site drainage (if applicable) - N/A, as it does not flow through the BMP Maintenance access - N/A, property is owned and maintained by Macon County Proposed drainage easement and public right of way(ROW) - NA, property is owned and maintained by Macon County Boundaries of drainage easement - N/A, property is owned and maintained by Macon County 2 Maintenance access - N/A, property is owned and maintained by Macon County Proposed drainage easement and public right of way(ROW) - NA, property is owned and maintained by Macon County Off-site drainage (if applicable) - not applicable as it does not flow through the BMP Boundaries of drainage easement - N/A, property is owned and maintained by Macon County A copy of the signed and notarized operation and maintenance (O&M) - The airport will maintain the proposed BMPs as they are within the Air Operations Area A copy of the deed restrictions (if required) - N/A since the property is owned by the airport and will not be subdivided. Permit Number: (to be provided by DWQ) m o?oF W a T?9pG T' ^ ? r WDENR ` STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM GRASSED SWALE SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 111) must also be filled out, printed and submitted along with all of the required information. 50 Project name , r Runway 7 600' Extension Contact name Eric Rysdon, PE, W.K. Dickson & Co., Inc. Phone number 704-334-5348 Date November 2, 2009 Drainage area number 6 (Grassed Swale No 3) Site Characteristics Drainage area 155,945.00 ft2 Impervious area 47,916.00 ft2 Percent impervious 30.7% % Design rainfall depth inch Peak Flow Calculations 10-yr storm runoff depth 9.36 in 10-yr storm intensity 4.79 in/hr Post-development 10-yr storm peak flow 9.09 ft3/sec Velocity Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec Soil characteristics (enter "x" below) Sand/silt (easily erodible) Clay mix (erosion resistant) X Grass Type (enter "x" below) Bermuda Tall fescue X` Bahiagrass Kentucky bluegrass Grass-legume mixture Swale type: Fill out one of the options below: Option 1: Curb Outlet Swale: (Y or N) Maximum velocity Side slopes :1 Swale length ft Option 2: Swale Seeking Pollutant Credit ("For-Credit" Swale): Y (Y or N) Maximum velocity for 10-yr storm 0:84 ft/sec OK Side slopes 10.00 :1 OK Swale length 300.00 ft OK Form SW401-Grassed Swale-Rev.4 Parts I and 11 Project Design Summary, Page 1 of 2 Permit Number: (to be provided by DWQ) Swale Characteristics Swale Shape: Enter an 'Y' in the appropriate cell below. Trapezoidal X Parabolic V-shaped Width of the bottom of the swale 6.00 ft Width of the top of the swale 31.60 ft Additional Information is the swale sized for all runoff from ultimate build-out? Y (Y or N) OK Is the BMP located in a proposed drainage easement with a N (Y or N) Insufficient ROW location. recorded access easement to a public Right of Way (ROW)? What is the distance from the bottom of the swale to the SHWT? 3.50 ft OK What is the ground level elevation? 2,016.00 fmsl What is the elevation of the bottom of the Swale? 2,013.00 fmsl What is the SHWT elevation? 2,009.50 fmsl What is the longitudinal slope of the swale? 0.10% OK What is the depth of freeboard? 2.22 ft OK Form SW401-Grassed Swale-Rev.4 Parts I and 11. Project Design Summary, Page 2 of 2 Permit No: ?r 1y (to be assigned by DWQ) p??? ? ?a r?S r xi; 1'Pt:•1L?? :'r?{; '???'?x?F ??,'i-1'?9 .-? ?> .. ?t {?t ,r ?'?iy `? !_, 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 r' Page/ Plan Sheet No. Plan sheet 1. Plans (1" = 50' or larger) of the entire site showing: 1/1 Design at ultimate build-out, - Off-site drainage (if applicable), Delineated drainage basins (include Rational C coefficient per basin), - Swale dimensions (width, length, depth), - Maintenance access, Proposed drainage easement and public right of way (ROW), - Grass species, and - Boundaries of drainage easement. Plan sheet 2. Plan details (1" = 50' or larger) for the grassed swale showing: 1/1 Swale dimensions (width, length, depth), - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Design at ultimate build-out, Grass species, - Off-site drainage (if applicable),and - Boundaries of drainage easement. Plan sheet 3. Section view of the grassed swale (1" = 20' or larger) showing: 1/1 Side slopes, - Longitudinal slope, - Freeboard Swale dimensions, and - SHWT level(s) See Appendix See following sheet See following sheet 4. Supporting calculations (including maximum velocity calculations for applicable storms) 5. A copy of the signed and notarized operation and maintenance (0&M) agreement. 6. A copy of the deed restrictions (if required). SW401-Grassed Swale-Rev.3 Part III, Page 1 of 1 Required Items Checklist - Justification for Items not included Grassed Swale Off-site drainage (if applicable) - N/A, as it does not flow through the BMP Maintenance access - N/A, property is owned and maintained by Macon County Proposed drainage easement and public right of way(ROW) - NA, property is owned and maintained by Macon County Boundaries of drainage easement - N/A, property is owned and maintained by Macon County Maintenance access - N/A, property is owned and maintained by Macon County Proposed drainage easement and public right of way(ROW) - NA, property is owned and maintained by Macon County Off-site drainage (if applicable) - not applicable as it does not flow through the BMP Boundaries of drainage easement - N/A, property is owned and maintained by Macon County 5 A copy of the signed and notarized operation and maintenance (O&M) - The airport will maintain the proposed BMPs as they are within the Air Operations Area 6 A copy of the deed restrictions (if required) - N/A since the property is owned by the airport and will not be subdivided. APPENDIX Storm Water Management Plan Summary BMP's Utilized - Pavement Sweeping (Weekly regenerative air/vacuum) = 65% - Grassed Swale = 35% BMP's in Series E = A + B - ((A x B) / 100) Pavement Sweeping + Grassed Swale = 65 + 35 - ((65 x 35) / 100) = 77.25% Plus Grassed Swale = 77.25 + 35 - ((77.25 x 35) / 100) = 85.21% BMP Notes Pavement Sweeping Weekly regenerative air/vacuum yielding a 65% removal of TSS per conversations with Annette Lucas. Grassed Swale There are three grassed swales shown on the water quality plan with a green hatch. There are two swales located in the grassed infield areas between the runway and taxiway and one swale located on the north side of runway 7-25. Each of the grassed swales are over 300 feet in length. The minimum required length for the grassed swale is 150 feet as described in the "NCDWQ Storm Water Best Management Practices Manual". Since the minimum length of the grass swale is more than doubled in each case the BMP has been counted twice for a removal credit as running in series. Runway 7 600' Extension Macon County Regional Airport WKD # 70107.00.CA Drainage Area 5 Areas, Runoff Coefficients A„ (ac) AP (ac) Ax (ac) 3.92 0.78 0.00 C„ CP Cx 0.35 0.95 0.00 Overland Flow (400 ft max.) L (ft) 98 n 0.125 S (ft/ft) 0.035 CA 2.230 m 1.667 CW 0.45 Tr (min) li (in/hr) Tc (min) 5 6.30 7.60 10 5.03 8.32 15 4.24 8.91 30 3.08 10.12 60 2.00 12.03 120 1.18 14.86 180 0.84 17.02 360 0.51 20.78 720 0.32 25.04 1440 0.20 30.22 Shallow Concentrated Flow L (ft) 0 S (ft/ft) 0.000 Paved or Unpaved? U V. (ft/s) 0.00 Tc2 (min) 0.00 Open Channel Flow L (ft) 1291 n 0.040 S (ft/ft) 0.007 R (ft) 1.00 V. (ft/s) 3.12 Tc3 (min) 6.90 Enter U for predominantly unpaved Enter P for predominantly paved e d` Total Time Of Concentration Runoff Calculation Tc1 (min) Tc2 (min) Tc3 (min) Tc (min) CW I (in/hr) At (ac) Q (cfs) 5.00 0.00 6.90 11.90 0.45 4.73 4.70 10.00 Average Return Interval 10 year Proposed Drainage Area TOC and Q Calculation J:\Pro?cts\MACON\70107000A\Documents\G_Design Calculations\7010700-Runoff rev 9-17-09.xis Grassed Swale No 1 Project Description Friction Method Manning Formula Solve For Normal Depth Input Data Roughness Coefficient 0.035 Channel Slope 0.00100 ft/ft Left Side Slope 5.00 ft/ft (H:V) Right Side Slope 5.00 ft/ft (H:V) Bottom Width 6.00 ft Discharge 10.00 ft'/s Results Normal Depth 0.94 ft Flow Area 10.00 ft2 Wetted Perimeter 15.55 ft Top Width 15.36 ft -- S Critical Depth 0.39 ft Critical Slope 0.02649 ft/ft Velocity 1.00 ft/s Velocity Head 0.02 ft Specific Energy 0.95 ft Froude Number 0.22 Flow Type Subcritical GVF Input Data Downstream Depth 0.00 ft Length 0.00 ft Number Of Steps 0 GVF Output Data Upstream Depth 0.00 ft Profile Description Profile Headloss 0.00 ft Downstream Velocity Infinity ft/s Upstream Velocity Infinity ft/s Normal Depth 0.94 ft Critical Depth 0.39 ft Channel Slope 0.00100 ft/ft Critical Slope 0.02649 ft/ft Bentley Systems, Inc. Haestad Methods Solution Center Bentley FlowMaster [08.01.066.00] 111212009 2:22:19 PM 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 1 of 1 Runway 7 600' Extension Macon County Regional Airport WKD # 70107.00.CA Drainage Area 26 Areas, Runoff Coefficients Average Return Interval Av (ac) Ap (ac) Ax (ac) 10 year 2.29 1.05 0.00 Cv Cp Cx 0.35 0.95 0.00 Overland Flow (400 ft max.) L (ft) 118 n 0.053 S (ft/ft) 0.030 IX 4.882 m 1.667 Cv,, 0.54 Tr (min) li (in/hr) T, (min) 5 6.30 4.94 10 5.03 5.41 15 4.24 5.79 30 3.08 6.58 60 2.00 7.82 120 1.18 9.66 180 0.84 11.06 360 0.51 13.50 720 0.32 16.27 1440 0.20 19.64 Shallow Co ncentrated Flow L (ft) 61 S (ft/ft) 0.148 Paved or Unpaved? U Vso (fus) 6.21 Tc2 (min) 0.16 Open Channel Flow L (ft) 361 n 0.040 S (ft/ft) 0.008 R (ft) 1.00 Von (ft/s) 3.33 Tc3 (min) 1.81 Total Time Of Concentration Runoff Calculation 1 c1 (min) 1 c2 (min) Tc3 (min) T. (min) C', li (in/hr) At (ac) Q (cfs) 4.94 0.16 1.81 6.91 0.54 5.81 3.34 10.48 Enter U for predominantly unpaved Enter P for predominantly paved Proposed Drainage Area TOC and Q Calculation J:\Pro?cts\MACON\70107000A\Documents\G_Design Calculations\7010700-Runoff rev 9-17-09.xls Grassed Swale No 2 Project Description Friction Method Solve For Input Data Roughness Coefficient Channel Slope Left Side Slope Right Side Slope Bottom Width Discharge Results Normal Depth Flow Area Wetted Perimeter Top Width Critical Depth Critical Slope Velocity Velocity Head Specific Energy Froude Number Flow Type GVF Input Data Downstream Depth Length Number Of Steps GVF Output, Data Upstream Depth Profile Description Profile Headloss Downstream Velocity Upstream Velocity Normal Depth Critical Depth Channel Slope Critical Slope 11/212009 2:23:22 PM Manning Formula Normal Depth 0.035 0.00100 ft/ft 10.00 ft /ft (H:V) 10.00 ft/ft (H:V) 6.00 ft 10.48 ft3/s 0.84 ft 11.98 ft2 22.78 ft 22.70 ft 0.37 ft 0.02781 ft/ft 0.87 ft/s 0.01 ft 0.85 ft 0.21 Subcritical 0.00 ft 0.00 ft 0 0.00 ft 0.00 ft Infinity ft/s Infinity ft/s 0.84 ft 0.37 ft 0.00100 ft/ft 0.02781 ft/ft Bentley Systems, Inc. Haestad Methods Solution Center Bentley FlowMaster [08.01.066.001 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 1 of 1 Runway 7 600' Extension Macon County Regional Airport WKD # 70107 00.CA Drainage Area 6 Areas, Runoff Coefficients A„ (ac) Ap (ac) Ax (ac) 2.48 1.10 0.00 C\, Cp Cx 0.35 0.95 0.00 Overland Flow (400 ft max.) L (ft) 184 n 0.107 S (ft/ft) 0.027 a 2.288 m 1.667 CW 0.53 Tr (min) li (in/hr) Tc (min) 5 6.30 10.19 10 5.03 11.16 15 4.24 11.94 30 3.08 13.57 60 2.00 16.13 120 1.18 19.92 180 0.84 22.82 360 0.51 27.87 720 0.32 33.58 1440 0.20 40.52 Shallow Concentrated Flow L (ft) S (fbft) Paved or Unpaved? Vec (mss) Tc2 (min) 0.00 Open Channel Flow L (ft) 322 n 0.040 S (ft/ft) 0.009 R (ft) 1.00 V. (ft/s) 3.53 Tc3 (min) 1.52 Total Time Of Concentration Average Return Interval 10 year Enter U for predominantly unpaved Enter P for predominantly paved Runoff Calculation Tc1 (min) Tc2 (min) Tc3 (min) Tc (min) CW li (in/hr) At (ac) Q (Cfs) 10.00 0.00 1.52 11.52 0.53 4.79 3.58 9.09 Proposed Drainage Area TUC and Q Calculation J:\PrActsXMACON\70107000A\Documents\G._Design Calculations\7010700-Runoff_rev 9-17-09.xls 0 0.000 U 0.00 Grassed Swale No 3 Project Description Friction Method Manning Formula Solve For Normal Depth Input Data Roughness Coefficient 0.035 Channel Slope 0.00100 ft/ft Left Side Slope 10.00 ft /ft (H V) Right Side Slope 10.00 ft/ft (H:V) Bottom Width 6.00 ft Discharge 9.09 ft3/s Results Normal Depth 0.78 ft Flow Area 10.79 ft2 Wetted Perimeter 21.70 ft Top Width 21.62 ft Critical Depth 0.34 ft Critical Slope 0.02843 ft/ft Velocity 0.84 ft/s Velocity Head 0.01 ft Specific Energy 0.79 ft Froude Number 0.21 Flow Type Subcritical GVF Input Data Downstream Depth 0.00 ft Length 0.00 ft Number Of Steps 0 GVF Output Data Upstream Depth 0.00 ft Profile Description Profile Headloss 0.00 ft Downstream Velocity Infinity ft/s Upstream Velocity Infinity ft/s Normal Depth 0.78 ft Critical Depth 0.34 ft Channel Slope 0.00100 ft/ft Critical Slope 0.02843 ft/ft Bentley Systems, Inc. Haestad Methods Solution Center Bentley FlowMaster [08.01.066.00) 11/2/2009 2:23:58 PM 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 1 of 1 UNDERDRAIN DESIGN FOR WATER QUALITY GRASSED SWALES Per the North Carolina Division of Water Quality Stormwater Best Management Practices Manual (section 5.7 underdrain systems) the minimum pipe size of 4 inches and the minimum number of pipes being 2 shall be used. The 4" underdrain pipes shall be laid at the same slope as the water quality grassed swale (0.10%) with a capacity of 0.04 cfs (see attached worksheet). The average drainage area for the underdrains is 6 feet by 300 feet being the swale bottom. A 1 inch depth of water on the swale bottom would result in 150 cubic feet of water that could be passed by the dual underdrains in 31.25 minutes. 6 ft x 300 ft x 1 in / 0.08 cfs = 1875 seconds = 31.25 minutes A request was made to F&R to provide a permeable velocity range base on the available geotech data (having done soil testing on the site in 2005). Their response was a range between 0.2 inches/hour and 2.0 inches/hour. Given the 5 inches of soil above the underdrain the passing time of surface water through the soil will range between 2.5 hours and 25 hours with the average time being 13.75 hours. Flow to the underdrain: Q = k (h/L) A A = (17 in width at bottom + 27 in width at top) / 2 * (5 in high) = 110 si = 0.7639 sf QUpper end of range = (2.0 in/hr / 12) * (1 ft / 300 ft) * (0.7639 sf) = 4.25e-4 cfs QLower end of range = (0.2 in/hr / 12) * (1 ft / 300 ft) * (0.7639 sf) = 4.25e-5 cfs QAverage = (4.25e-4 cfs + 4.25e-5 cfs) / 2 = 2.34e-4 cfs With a safety factor of 10 the design flow is = 0.00234 cfs Therefore the capacity 0.08 cfs from the dual 4 inch pvc pipes A 0.10% is okay * It is noted that the underdrains are being installed to assist in the maintenance of the Grassed Swale bmp, not to act as a part of the functionality of the bmp. Dual 4" PVC Underdrain Capacity Project DesCripon Friction Method Manning Formula Solve For Full Flow Capacity Input Data Roughness Coefficient 0.010 Channel Slope 0.00100 ft/ft Normal Depth 0.25 ft Diameter 0.25 ft Discharge 0.04 ft'/s Results Discharge 0.04 ft'/s Normal Depth 0.25 ft Flow Area 0.05 ft2 Wetted Perimeter 0.79 ft Top Width 0.00 ft Critical Depth 0.11 ft Percent Full 100.0 % Critical Slope 0.00561 ft/ft Velocity 0.74 ft/s Velocity Head 0.01 ft Specific Energy 0.26 ft Froude Number 0.00 Maximum Discharge 0.04 ft-'/S Discharge Full 0.04 ft'/S Slope Full 0.00100 ft/ft Flow Type SubCritical GVF Input Data Downstream Depth 0.00 ft Length 0.00 ft Number Of Steps 0 GVF Output Data Upstream Depth 0.00 ft Profile Description Profile Headloss 0.00 ft Average End Depth Over Rise 0.00 % Normal Depth Over Rise 100.00 % Bentley Systems, Inc. Haestad Methods Solution Center Bentley FlowMaster [08.01.066.00] 11/3/2009 10:38:20 AM 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 1 of 2 Dual 4" PVC Underdrain Capacity GVF Output Data Downstream Velocity Infinity ft/s Upstream Velocity Infinity ft/s Normal Depth 0.25 ft Critical Depth 0.11 ft Channel Slope 0.00100 ft/ft Critical Slope 0.00561 ft/ft Bentley Systems, Inc. Haestad Methods Solution Center Bentley FlowMaster [08.01.066.00] 11/3/2009 10:38:20 AM 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 2 of 2 PERMANENT SEEDING SCHEDULE - MIXTURE #3M Seeding Mixture Species Tall fescue Kentucky bluegrass Sericea lespedeza Korean lespedeza Seeding note 1. After Aug. 15, use unscorified sericea seed. 2. Where appearance is a consideration, omit sericea lespedeza and increase Korean lespeclezo to 40 lb/acre. Rate (lb/acre) 60 10 15 10 Nurse plants Between May 1 and Aug. 15, add 10 lb/acre German millet or 15 lb/acre Sudangrass. Prior to May 1 or after Aug. 15, add 40 lb/acre rye (grain). Seeding dates Below 2500 ft: Best Aug. 15 - Sep. 1 Mar. 1 - Apr. 1 Possible Jul. 25 - Sep. 15 Mar. 1 - May 10 Above 2500 ft: Jul. 25 - Aug. 15 Mar. 20 - Apr. 20 Jul. 15 - Aug. 30 Mar. 5 - May 15 Soil amendments Apply lime and fertilizer according to soil tests, or apply 4,000 lb/acre ground agricultural limestone and 1,000 lb/acre 10-10-10 fertilizer. Mulch Apply 4,000 lb/acre grain straw. Anchor mulch by tacking with asphalt, netting, roving or by crimping with a mulch anchoring tool. A disk with blades set nearly straight can be used as a mulch anchoring tool. Maintenance Refertilize in the second year unless growth is fully adequate. May be mowed once or twice per year, but mowing is not necessary. Reseed, fertilize and mulch damaged areas immediately. Permit Name: (to be provided by DWQ) Drainage Area Number: Grassed Swale Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. Important maintenance procedures: - The drainage area of the grassed swale will be carefully managed to reduce the sediment load to the grassed swale. - After the first-time fertilization to establish the grass in the Swale, fertilizer will not be applied to the grassed swale. The grassed swale will be inspected once a quarter. Records of operation and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potential problem: How I will remediate the problem: The entire length of the Trash/debris is present. Remove the trash/debris. swale Areas of bare soil and/or Regrade the soil if necessary to erosive gullies have formed. remove the gully, and then re-sod (or plant with other appropriate species) and water until established. Provide lime and a one-time fertilizer application. Sediment covers the grass at Remove sediment and dispose in an the bottom of the swale. area that will not impact streams or BMPs. Re-sod if necessary. Vegetation is too short or too Maintain vegetation at a height of long. approximately six inches. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality 401 Oversight Unit at 919- outlet. 733-1786. Form SW401-Grassed Swale O&M-Rev.3 Page 1 of 2 Permit Number: (to be provided by DTVQ) I 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 prior to any changes to the system or responsible party. Project name: Runway 7 600' Extension for the Macon County Airport BMP drainage area number: 2B 5 & 6 Print name: Miles Gregory Title: Chairman - Macon County Airport Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. I,:7re Ga) M= '_D'VLJc o , a Notary Public for the State of NOLN IVV? ? C > County of M d ooo , do hereby certify that kllie5 CG,M QTLU personally appeared before me this day of N oye y- )t:r , D , and acknowledge the due execution of the forgoing grassed swale maintenance requirements. Witness my hand and official seal, ---:r ', j'?) ?. ?? SEAL My commission expires O ?U i Form SW401-Grassed Swale O&M-Rev.3 Page 2 of 2 Address: 5 West Main Streei Franklin N.C. 28734 0 NO V 1 2 2009 M M DENR • WATERQK3Y 1!'f?Jil?O •?1H NTAd??Y?lLL001 W`N ? V N 0 N U L C O Z T C 7 O U c 0 U N a? N F N (6 O L a 47 0 0 O CL O N O _ N N a) m coi rn '0 co L -0 C: 3 a) N U N N co c N 0 N .O a U N Q) N -0 (n 7 ? O N C Q,E - Y N _ d N O O N U C N f p O N E L O Q E N co C O OR (D Cn a? y NZo Z 0M 00c:> - N Q pv 3 O d C 3 Q U O L N p = 0 C C _N Q E L O Z N N Z N Q N C C i to OQ LL N Q 0 U N ? O L N O a) 0 O O -0 N> U c > m c c 0 3 I L o °- o m T o 0 N f N o . 0 N o D E Uc a N?En d CL o N N 0 a o m N N o US C13 a) E Q $ . U ? o f m N y > ? 3 (A N L A C ,N C C O CO (6 w L N Z? E N- C y N O N 0 N O -O "O O. Lq Cl) N w c U' T? o Z> O)N N N N 'E ON C o° m 0 - - Z O O E ](n U-O T m N E N L 0 U-0 co "o C U) N O N "O O Z Q N O L 0 L, 73 O. N N N N j `O L? N N > (n v -' O d N N E E d E U) > U FLO. in (n 0 N H U o Q N Q Z ? a w N T C (6 U r W D a = w co W Q O CL m O LO N O LO O O N O H N N ID 0 N 7 of N J IL ¢ - U) N rn° N oi Lo ° o ° n ` D a d U m o y N d in c( Cl) a C d m LL C ` - 4J V ` N L C + ¢ p 0 0 a 3 1 ? m? O O O N N N ? O1 N d T (D Z 7 U) ? O 7 N ? r N o (n 0- _a o O O U ca c O N Z d v N d N 2y ? C O w.2 ` m 3 N w O tC O Z U Depth to Water Table-Macon County, North Carolina Depth to Water Table Depth to Water Table Summary by Map Unit- Macon County, North Carolina Map unit symbol Map unit name - Rating (centimeters) Acres in AOI Percent of AOI BkB2 Braddock clay loam, 2 to 8 >200 2.1 3.8% percent slopes, eroded DsB Dillsboro loam, 2 to 8 percent >200 18.4 32.9% slopes EvD Evard-Cowee complex, 15 to 30 >200 0.3 0.6% HaC2 percent slopes Hayesville clay loam, 8 to 15 percent slopes, eroded >200 8.6 15.5% HaD2 HmA Hayesville clay loam, 15 to 30 percent slopes, eroded Hemphill loam, 0 to 3 percent slopes, rarely flooded >200 30 0.0 0.0 0.1% 0.0% ScC Saunook loam, 8 to 15 percent >200 1.4 2.4% slopes 1 ToA Toxaway loam, 0 to 2 percent 30 20.8 37.1% slopes, frequently flooded - Ud Udorthents, loamy >200 4.2 7.6% Totals for Area of Interest i - - 55.9 10 0.0% ---- - Description "Water table" refers to a saturated zone in the soil. It occurs during specified months. Estimates of the upper limit are based mainly on observations of the water table at selected sites and on evidence of a saturated zone, namely grayish colors (redoximorphic features) in the soil. A saturated zone that lasts for less than a month is not considered a water table. This attribute is actually recorded as three separate values in the database. A low value and a high value indicate the range of this attribute for the soil component. A "representative" value indicates the expected value of this attribute for the component. For this soil property, only the representative value is used. Rating Options Units of Measure: centimeters Aggregation Method: Dominant Condition Component Percent Cutoff. None Specified Tie-break Rule: Higher Interpret Nulls as Zero: No Beginning Month: January USDA Natural Resources Web Soil Survey 11/5/2009 lim Conservation Service National Cooperative Soil Survey Page 3 of 4 Depth to Water Table-Macon County, North Carolina Ending Month: December Natural Resources Web Soil Survey 11/5/2009 Conservation Service National Cooperative Soil Survey Page 4 of 4 H _ µ n.~..u _ ~,„,,aA~w.__~a,. o,,. ~~~~.~..K.~ ~.w~NN. ,..w,.r w„ a~~,...._. _ .n..~n iw M,~~.~,~~,.~~~,~. ..~.~v.~m~.~~.~w.~. °~r~ a.w..~aw~~ ..w~.~..~,. ~x~ ~ ~ / f ~ ~f t" t! r~ / l ~ ~ w..,,ba.~,u,.,,.~.. .u,.~~._..~...,.._....~,,....,.._ s...:,r. _w„~, .=.r..,__..,..._ _.._..m~... v.. ~.~,.,..._.wM,.>W.,........ .,.~.,.u.~._ .r i ~ ~ ~ r ~ ~ / i r ~ ~ ~ f ~ ~ ~ x,..~,T.,e N.., ~~~"".,r, d~ ri,~~ _~m~i .u _ _ s",c _~...a.. / / ~ i ~ f ~ r ~ ,'1 ~ , w ~ r ~ ~`2~~ ~ , ~ ~t i ~ t' r I ! f f t r ` 1 t ' ~l t r 2 ,t ~ r l/ /J l r ' 1 r 't ' / t ~ l f t _.--.f v ~ v~ - ~ ~ -X-X"-X-~/.'--X x X t. ~ n-X- ~ ~ ( f ~ ,--x -X x , .x .~--,X-~ x X---X--x x x-x-x-X-x-r-~ X•-x--` X~.X-X X--X ~ X---~,~x-X-Y,--~-X~~-.-X=-~X-X~X=-°~r,---X-X--~X*~ 4 x-k x-._X..~x.,..-x.~X_-.._/-;c-X---x--X-X---X-X--X--k- f ti `w, 1 1) ! k ~ ~ ~ s ~yq ~ ~ { - ~ , ( W ~~w8 ~ ~~v° ~ ~ 1 I 1 ~ ~ ~ ~ i th 1' ~ ~ "g-~ C s 1 ? si'~ ~ ~.k ~ I 'lr ~ iii ~ IiI s ~ i ~ ~ ~ 1 le. ,/~",..~4.. b p.,~i ~s""'t"°p-vy~sy, ` \ 'l x ~ ~ .t~s \ ~ ~ al,d r t / .w I~ PROPOSED ~(ATER ~ ~ i ~ ~ ~ ~ ~ ~~~i6 ° ~ ~ ~ ! ~ Ei ~ ~ • ~ [ r QUALITY GR,~SSED i ~ ~ ~ ~ \ ` ~ ~ ~1 / ~ ! ~ { ~x , ,(-+...-Lxr f 1 ' r r f N. 1 d~ r ~~'a A~/~1~` r ~ r'~~li fa~1. 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V'e ~ ~ v~. ~ , ' ~ - ~ ~ - _ _ , y ~ ~ ~ ~ ~ ~ _ ~ ~ . , 5, - - - . --t- - ~ - ~ - ~ ~ _ ~ ~ l~ , - i 1 r ~ ~ _ , F ~ ~ i - , I ~ ; ~ ~ Ri~Psi~ AY i~ j ..F"'`~ j i f ~ _ -ti. ~ ~ ,e-.,,~.,~ a / . ~ 1 ~ I i , 4. .a - ~ 1 i ~ . ~ } r'' i i ~°V ,r ' i ~ i~ `i ~ , 1. ~ `y ~S' ry \ of , 020 01B ~ _ - _ - 01 ~ fir' ~ 203 r ~ ~ , i ~ 25 ~ r O ! < to } 20 \ ~ M; 2017 f r ~ : ; v ~ ~ I i ~ ~ 4 ~ ~ ~ ~ , tf! - f X: s ; ~ p. ,x ~ i t~ ~ ~ ,f ° ~ 2023 '4 2020 \ a \ a ~.r ' 1 2016 2016 _ ~ _ ~ ~ ' ~ ~ :~,ti i 1 2 ~ k ~ 20 9 ~t~ ` ,,t ~ ~ ~ ~ F , 1 ~ ~ st ~ i.,, ~ ~ , 2018 ~ ~ ~ ti ` ~p`1-~' ,I - 2013 _ - . 014 ~ 1 f ~ ~i 202 - t .i i 1 ~w f ~ ~ 2 ~ ~ N~~ LIMITS OF ~ ~ ~ ~ 2022 i. 2019 , k ' ~ . ` , m-~-,- ` 201 ~ ° ~ ~ ~ - ~ ~ ~ _ PROPOSED 4>fATER`~ ~ - , ~ t ~:a ~ ~ ~ r~ ~ DISTURBANCE I ~ 2023 ~ 2020 ~ ~ ~ . 2016 QUALITY GRA55ED ~ r~ ~ i ~ 1 ~ _ .,1~. ,r ~ v~ , i ~ E~ROPOSED WATE _ _ ~ I ~ I _ _ ---5 .ALE 3 015 ~ ~ ~ ~ i ~ Y~ ,i~~ ~ t -QUALITY GRASSED ~ - ~ . ~ ~ ~ ~ ~ ~ a 300 x6~0.7i3 ~ z ~ , ~ ~ 017-..:. ` ~ v-- ~ ~ ~ r.r ~ X021 p 4 WALE ~E2 1 ~ j Via, 1~ i ~ ~ ! (300 x6 x . ) ; _ ^-.ti ~ e f f I ~ .~i ~ ~r _ . 2016 ~ ~ , ~ ~ o I ~ ~ r ~ ~ ~ N. , r ~ ~ / ~ ~ w ~ r~ f _ ~ _ .4~ - ors ? i , ~ 1 -F - - - i , n t: y }~~3p i ~ ~ ~ i',' , - imrv7~5EiV~7 Sfo dw~V9Pt 4 9e§g ? ~ _r ~ , ~ ~ ~ ~ / r ~ .F % .1 t ' . ~ i u - ~ ~ _ ~ r / S - / 201 ~ 1 20 ; . - - i,.. ~ ~ - ,ors p ~-"w„~fi-.. _ ~ _ ~ u _ M: . _ _w , ,w,.. _ _ ~ ~ ~ - ..~~mw ~ ~ r _ _ _ - . _ - - _ ,w. ~ _ - ke o, , _ _ _ ~ ~ ~ w ~ k I_ ~..x-~". 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VI " A i l ~t W '~\~~~~//i\//\\//\\ - DEPTH k~ 3.35 AC PROPOSED PAVEMENT PROPOSED ASPHALT PAVEMENT ~ \ PROPOSED ASPHALT PAVEMENT I Tt PAVEMENT TO BE 1.56 AC EX S NG ~ EXISTING PAVEMENT TO BE REMOVED ~ PROP05ED GRASSED SWALE REMOVED ,,///~~e~',M~\ / \f~//~~~/~ EROSION CONTROL GRASS ~~\~7",MIN MAT'CING, NAG S75BN 1.79 AC NET INCREASE OF IMPERVIOUS RE A A `\~i\\i\ i \\i~~ OR t}~PPROVED EQUAL ~ E ~.I UNDERDRAINS /``w NOTES: 6 FT BOTTOM WIDTH ~ 1. 5EE TABLE BELOW FOR SWALE DIMENSIONS. .~~.~,,.~„.~.w,~~~...~.~~.~,~.,,~,4~.mm. 2. UNDERDRAINS SHALL BE DUAL 4" PERFORATED PVC AT THE BOTTOM OF A 17" WIDE BY \ - 7" HIGH GRAVEL JACKET WRAPPED IN FILTER FABRIC. THE GRAVEL JACKET COMPRISED OF J' f T l\ g N0. 67 WASHED STONE SHALL PROVIDE 3" OF COVER ON THE TOP, SIDES AND IN BETWEEN THE DUAL 4" PERFORATED PVC PIPES. I ` 3 3. THE TOP WIDTH IN THE TABLE BELOW IS TO BE USED FOR THE EROSION CONTROL f MATTING LIMITS, NOT THE GRADED TOP OF BANK. SEE GRADING PLANS FOR THE TOP OF s a . ~7 3 ~ ~ BANK LOCATIONS. I E- - ~ ¢ 4. THE GRADING QF THE WATER QUALITY GRASSED SWALES SHALL BE PAID FOR UNDER THE 100 0 100 200 "EMBANKMENT IN PLACE" ITEM OF WORK. PAYMENT FOR THE EROSION CONTROL MATTING i SCALE: 1 = 100 AND UNDERDRAINS ASSOCIATED WITH THE WATER QUALITY GRASSED SWALES SHALL BE MADE UNDER THE "WATER QUALITY GRASSED SWALE" ITEM OF WORK. q GRASSED SWALE TABLE i,, ~a w ~u ~e~~~ ~aa ti ,n, _ , o SWALE N0. MAX SLOPE BOTTOM WIDTH TOP WIDTH SIDE SLOPES hlOU 2009 p~ ,,,~..~,~~...e~.~.,,a..~,.,.~,..~..,.a~~.,~,.,..,~.~.~,..~~~,~.~,~-a~-.na,....5,.~~..~.r..~.~~ w.~.~_~....,..,.~_.,.~,s.~.~_,~.,~M~~~.ua.,~~wK.,..~.~„~~,.-,~.~~~..,~,,~,.~~,.~,~..~,,,,..~me~:~~.~.,~..u.,~.~.~.,~,~~~~~~~,~~n~,,~..~~,, .w._r~.._.~..,~„ r,?iE4'mT t~C~,:s 9n5v~ ' a' € `~K 1. 0.10 6' 21' 6:1 ~..,u~,.,,~ ~ 2. 0.10q 6' 33' 10:1 ~~R-~~~~~~' ANDS At~S a o o,~.~ ~ x. , . I 3. 0.10 6' 32' 10:1 ~NATE ALITY GRASSED SI~ALE NOT TO SCALE ~ PROJECT MANAGER DRAWNG SCALE 616 COLONNADE DRIVE RELEASM FOR DATE EAR AS SHOWN RUN V CHARLOTTE, NC 28205 APPROVALS DESIGN/DRAWN BY PROJECT DATE ~0' 334^5348 RUN W AY EXTENSION Ta(704) CADD SEP .2009 t BIDDING FOR THE APPROVED BY PROJECT NUMBER Office Locations AI WATER "IJALITY PLAN OVERALL ACO COUNTY AIRPORT EAR 70107.00.CA [)JA`KSON North Carolina Kentucky CONSTRUCTION FREV.NO.l DESCRIPTION DATE ALE NAME community infrastructure consultants South Carolina Georgia 7010700-M-su lement aw s i REVI$1®NS PP 9 NC LICENSE NO. F-0374 RECORD DWG. FRANKUN, NORTH CAROLINA 1 r Z s P I P ~ y ~ b -r I f f i Y f ~ ~ r• KX ~ r d j ~ ) q~ ~ e L7 k k ha ~k t `y '@s„ ~f ?n 'b ~°':u ^f s:y. 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I I vv ad ~taw L~ alt .,i ONQLj PROJECT MANAGER DRAWING SCALE 61$ COLONNADE DRIVE RELEASED FOR DATE R AS OWN EA SH 4r CHARLOTTE, NC 28205 APPROVALS RUM DESIGN/DRAWN BY PROJECT DATE (704) 334-5348 RUNWAY 7 600' EXTENSION CADD SEPT. 2009 FOR THE I E APPROVED BY PROJECT NUMBER Office Locations ADDING a~ ""KSON MAON COUNTY AIRPORT EAR 70107.00.CA WDIC, North Carolina Kentucky CONSTRUCTION REV. NO. DESCRIPTION DATE FILE NAME community infrastructure consultan$s south Carolina Georgia 7010700drar F FRANKUN, NORTH CAROLINA RE~~Q~S NC LICENSE NO. F-0374 RECORD DWG.