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HomeMy WebLinkAboutSW6111103_HISTORICAL FILE_20121113STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. I SW DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS HISTORICAL FILE COMPLIANCE EVALUATION INSPECTION DOC DATE Z� YYYYM M D D �4 �. r NCDENR North Carolina Department of Environment and Natural Resources Beverly Eaves Perdue Governor Mr. Dohn Broadwell, Jr. Broadwell Land Company P.O. Box 53587 Fayetteville, NC 28305 Division of Water Quality Charles Wakild, P.E. Director November 13, 2012 Subject: (Approved. Plan Revision Stormwater Permit No. SW6111103 Heathcliff at Westpoint Cumberland County Dear Mr. Broadwell: r DEC 1 1 2012 DWQ Dee Freeman Secretary The Stormwater Permitting Unit received a request for a plan revision for Stormwater Management Permit Number SW61111O3 on January 25, 2012; with additional information received November 6, 2012. The plan revision includes revisions to meet local requirements; and does not change the total allowable amount of BUA on the site. It has been determined that a formal permit modification is not required for the proposed changes. We are forwarding you an approved copy of the revised plans for your files. Please be aware that all terms and conditions of the permit issued on December 9, 2011 remain in full force and effect. Please also understand that the approval of this revision to the approved plans for the subject State Stormwater Permit is done on a case -by -case basis. Any other changes to this project must be submitted to and approved through the Division of Water Quality prior to construction. The issuance of this plan revision does not preclude the permittee from complying with all other applicable statutes, rules, regulations or ordinances which may have jurisdiction over the proposed activity, and obtaining a permit or approval prior to construction. If you have any questions, or need additional information concerning this matter, please contact Robert Patterson at (919) 807-6375; or robert.patterson@ncdenr.gov. Sincerely, for Charles Wakild, P.E., Director enclosures - approved revised plans cc: Isw611iio File w/ enclosures? ec: Mike Lawyer - Fayetteville Regional Office Wetlands and Storunwater Branch 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 Phone: 919-807-63001 FAX 919-807-6494 Internet: vv wv ncwaterqualily.or; An Equal Opportunity 1 Affirmative Action Employer J NoNrthiCarolina Aaturally 1745 Cypress Lakes Rd Gooden & Associates,IncHope Mills, NC 28348 I - I Phone: 9I0-223-7766 we in , Planning, Mapping SU FAX: 910-223-7788 iprevettcaaoodcnswvcvi n2.com Mr. Robert Patterson NC DENR - Division of Water Quality Stormwater Permitting Unit Post -Construction Application 1617 Mail Service Center Raleigh, NC 27699-1617 RE: HEATHCLIFF AT WESTPOINT STORMWATER PERMIT SW6111103 Robert, December 8, 2011 j2@jRflW70o DEC - 8 2011 D IiNDSDENR ALiTy MD STORMWg7FR ERMNCH Please find attached two copies of the revised drainage sheet. Regards, ohn E. Prevette, III, P.L.S. attachments I _ 1_ 1745 Cypress Lakes Rd Gooden & Associates Inc Hope Mills, NC 28348 _f _ 1-, �i_ Phone: 910-223-7766 Surveying, Planning, Mapping FAX: 910-223-7788 iprevette(algoodensurveying, corn Mr. Robert Patterson NC DENR - Division of Water Quality Stormwater Permitting Unit Post -Construction Application 1617 Mail Service Center Raleigh, NC 27699-1617 RE: HEATHCLIFF AT WESTPOINT STORMWATER PERMIT Robert, December 6, 2011 kINEWIR P DEC - 6 2011 DENR-WATER QUALITY WETIANDSMD STORMwATER BRANCH I have made revisions to sheets C3, CS, C17, and C17 as laid out in the email I sent you. Please find the attached sheets along with the revised supplement forms for the wet basins. Thanks for your help, and please let me know if you need any thing else. Regards, ri+A John E. Prevette, 111, P.L.S. �QoPos� D P�OSG— .5pMawd To 'PRq A/ 9[fo"i'Z - w/ ,Tot+,✓, enclosures North Carolina Beverly Eaves Perdue Governor Mr. John E. Prevette, III, PLS Gooden & Associates, Inc. 1745 Cypress Lakes Rd. Hope Mills, NC 28348 Dear Mr. Prevette: w NC®ENR Department of Environment and Division of Water Quality Coleen H. Sullins Director November 29, 2011 Natural Resources Subject: Request for Additional Information Stormwater Project No. SW6111103 Heathcliff at Westpoint Cumberland County Dee Freeman Secretary The Division of Water Quality Central Office received a Stormwater Management Permit Application for the subject project on November 17, 2011. A preliminary review of that information has determined that the application is not complete. The following information is needed to continue the stormwwater review: / 1.) No proposed contours are shown on the drainage plan. Please show and label all proposed l / countours on the plan. The plan must be shown at a scale of 1"=50' or larger. ✓2. Please delineate the drainage areas to each pond on the drainage plan based on the proposed contours. All proposed BUA must be captured and treated in the proposed ponds. Without the proposed grading shown it is difficult to determine, but it appears the BUA from the following areas will bypass the proposed BMPs: lots 77-89, and most of the lots to the southeast of Suncoast Dr. Also, lots 74-76 are not directed to the forebays. At the small scale provided, it is difficult to determine what is happening with the grading and collection system in the area around FES"15" and C13"14". ✓5. The stream labeled as an UT and shown on C05 needs to be shown on the drainage plan with the required 30' vegetated setback. '*'6. Is it the intent that the overflow weirs be used as the bypass for the level spreaders (LS)? 7. For both ponds& 2 (�a. The bottom elevations are not shown consistently in the plan views, details, calculations, supplement forms, and O&M agreements. Also, the plan view should show the actual excavation depth to the bottom of the sediment storage. ' b. The supplements state that drain valves are provided for maintenance/emergencies, but that is not shown on the details. Note that pump out is an allowable option. c. The details and calculations show four 1.0" holes for the drawdown orifice, but the supplements show a 2.0" orifice. Please verify which is correct. Wetlands and Stormwater Branch One 1617 Mail Service Center, Ralegh, North Carolina 27699-1617 IVorthCarolina Location: 512 N.'Salisbury St. Ralegh, North Carolina 27604 // Phone: 919-807-63001 FAX: 919-807-64941 Customer Service, 1-877623-6748 Naturally Internet: wvw.ncvvaterquality.org ((�� �/ An Equal Opponumly 1 ARrmative Action Employer Mr. John E. Prevette, III, PLS SW6111103 - Heathcliff at Westpoint November 29, 2011 mod. The LS show the concrete lip elevations in the details at 1' to 1.5' below the grade shown on the plan views. Please verify the proposed elevations. ✓8. For pond 1: the rip rap at the overflow weir needs to extend down to at least the bottom of the fill slope. 9. For pond 2: a. The overflow weir detail shows incorrect elevations. mob. The LS length shown on the detail is not consistent with the plans, supplement, and calculations. Please note that this request for additional information is in response to a preliminary review. The requested information should be received by this Office prior to December 30, 2011, or the application will be returned as incomplete. The return of a project will necessitate resubmittal of all required items, including the application fee. If you need additional time to submit the information, please mail or fax your request for a time extension to the Division at the address and fax number at the bottom of this letter. The request must indicate the date by which you expect to submit the required information. The Division is allowed 90 days from the receipt of a completed application to issue the permit. The construction of any impervious surfaces, other than a construction entrance under an approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action pursuant to NCGS 143-215.6A. All revised original signed documents must be returned or new originals must be provided. Copies are not acceptable. Any revised calculations or plans must be sealed, signed, and dated; and have a revision date shown. Please reference the State assigned project number SW6111103 on all correspondence. If you have any questions concerning this matter please feel free to call me at (919) 807-6375, or at robert.patterson@ncdenr.gov. Sincerely, ZIV7tp.10;e-� Robert D. Patterson, PE Environmental Engineer Stormwater Permitting Unit cc: SW6111103 File ec: Dohn Broadwell - Broadwell Land Company Mike Lawyer - Fayetteville Regional Office Page 2 of 2 Application Completeness Review 5? First Submittal ❑ Re -submittal Development/Project Name: Receiving stream name _/Hi- Riverer Basin: %4 -m CazA-.e_ /1 / /1 By Bill Diuguid 4+ High Density Projects that require a 401/404 within an NSW require 85% TSS, 30% TN and 30% TP removal. T&E Species (Goose Creek, Waxhaw Creek or Six Mile Creek Water Sheds): AJ Latitude and Longitude:3S OZ 13 AI - 6yp O't W Jurisdiction G ,., Project Address: ti x-ai o S sc DR Engineer name and firm: ?06.. E. 7M . 'PL S . Caoe4.0 t Ass ucio Yr c Is the project confirmed to be in the State MSI Stormwater Permit jurisdiction? 53rYeS' or ❑ No ❑ Low Density (no curb and gutter) ❑ Low Density with curb and gutter outlets 2<gh Density ❑ Other 401/404 imp l is to surface waters, wetlands, and buffers (add language to cover letter and/or add info letter) UA d WtTL�1,l DS �q Wf 57G ey ECGG Of rR�P�'RTY V Pdginal signature (not photocopy) on application H"' Legal signature (Corporation-VP/higher, Partnership -General Partner/higher, LLC-member/manager, Agent). Check spelling, capitalization, punctuation: http://www.secretary.state.ne.us/corporations/thepage.aspx If an agent signs the application, a signed letter of authorization from the applicant must be provided which includes the name, title, mailing address and phone number of the person signing the letter. t/;or subdivided projects, a signed and notarized deed restriction statement [ Sealed, signed & dated calculations e Correct supplement and O&M provided for each BMP on site (check all that were provided & number of each) ❑ Bioretention ❑ Dry Detention Basin e3' Filter Strip ❑ Grass Swale ❑ Infiltration Basin ❑ filtration Trench ®' Level Spreader ❑ Permeable Pavement ❑ Restored Riparian Buffer ❑ Rooftop Runoff Management ❑ Sand Filter mwater Wetland et Detention Basin ❑ Low Density ❑ Curb Outlet ❑ Off -Site ❑ NCDOT Linear Road 0 Two sets of sealed, signed & dated layout & finish grading plans with appropriate details [3' Narrative Description of stormwater management provided Soils report provided Wetlands delineated or a note on the plans or in the accompanying documents that none exist on site and/or adjacent property Details for the roads, parking area, cul-de-sac radii, sidewalk widths, curb and gutter; Dimensions & slopes provided V Drainage areas delineated ❑ Pervious and impervious reported for each ❑ Areas of high density m,,.'BMP operation and maintenance agreements provided Application complete ❑ Application Incomplete Returned: (Date) Comments May 5, 2011 Revision, Bill Diuguid Rd - Inc17op Cypress C28 48 Gooden &Associates, Iliopc Mills, NC 28348 Surveying, Planning, Mapping Phone: 910-223-7766 PAX: 910-223-7788 IprevcllC a koodensurveyin�; Cum November 16, 2011 Mr. Robert Patterson NC DENR - Division of Water Quality Stormwater Permitting Unit Post -Construction Application 1617 Mail Service Center Raleigh, NC 27699-1617 RE: HEATHCLIFF AT WESTPOINT STORMWATER PERMIT DLQ PROJECT ID: CUMBE-20111028-1 Robert, In reference to your letter dated 10/28/2011 sent to Dohn Broadwell, we are submitting an application packet for a stormwater permit approval. The City of Fayetteville approved these plans several months ago, including the stormwater management plan. However, we have recently discovered that the City is not an approved reviewer for State Stormwater and are submitting the plans to you for your review. Regards, n OUR D John E. Prevette, III, P.L.S. NOV a 7 2011 DENR - WATER QUALITY WETLANDS AND STDRM ftTa KWH enclosures Gooden & Associates, Inc Surveying, Planning, Mapping STORMWATER NARRATIVE HEATHCLIFF AT WESTPOINT CUMBERLAND COUNTY, NC 1745 Cypress Lakes Rd Hope Mills, NC 28348 Phone: 910-223-7766 FAX 910-223-7788 Nov 14, 2011 The site contains wetlands at the western edge of the property. Otherwise the soil is sandy and vegetation is grassy pasture. This site is fairly Flat except the area that slopes down to the wetlands. All runoff from impervious areas will flow into catch basins in the streets. The runoff will be treated by one of two wet detention basins. EAL 05 �y2<9N SSI�IR4E 0 7G � Hn Wet Detention Basin 1 & Level Spreader Heathcliff Calculations John E. Prevette III, P.L.S. L-4905 Gooden and Associates, Inc. 1745 Cypress Lakes Rd Hope Mills, NC 28348 910-223-7766 iprevette@goodensurveying.com CARD =pQ oFESS/O �Gy 4 SEAL r L-4905 O <9 pQ y� tia Onn�IF� Method - Find permanent pool dimensions: o Iterate dimensions to achieve an acceptable surface area to drainage area ratio - Find temporary pool dimensions: o Calculate the required treatment volume o Find the max stage needed to store the treatment volume - Find temporary pool draw -down orifice dimensions o Iterate orifice dimensions to find an acceptable flow that will drain the treatment volume in 2-5 days o The orifice flow must not exceed the pre -development 1-yr 24-hr peak flow - Find level spreader dimensions: NOTE., All formulas are taken from the Stormwater BMP Manual Given Description Area (sq ft) % of Total Rational C Lot built -upon area 143,500 26.0% 0.9 Street area 74,900 13.6% 0.9 Sidewalk area 7,150 1.3% 0.9 Yards area 325,150 59.1 % 0.2 Total Drainage Area 551,700 1 100.0% 0.5 Impervious Percentage =40.9% Tc = 15 minutes Rational i10yr = 5.34 in/hr 10-yr 24-hr precip = 5.52 in Rational i25yr = 5.98 in/hr 25-yr 24-hr precip = 6.69 Nov 14, 2011 Page 1 of 6 Project # 08018 Gooden & Associates, Inc. Temp Pool Top Shelf Perm Pool Btm Shelf Btm Forebay Btm Pond [Figure 1] - Pond Dimensions y D 0 o ¢ i a i a m a n LL LL i0 w n ry `? o u 212.1 6.6 3446 10846 3320 8803 11044 32941 14291 41744 19631 211.0 6.6 2604 9250 1213 5484 4064 21897 11864 27380 6267 0 7000 3068 4271 2979 17843 9260 22314 M210.O4.5 4 4960 3203 3203 14864 14864 6974 18066 0 3464 0 0 4664 0 1764 1764 Permanent Pool Pollutant removal within a wet detention basin is dependent upon two integral components — average depth and permanent pool surface area. Average depth, is a function of the surface area, total depth, and side slopes, and must be recalculated if any of these dimensions change. Surface area is directly proportional to the total drainage area by a factor found in a table in the Manual. To find the factor in the table, the designer must know the percent of impervious area and the average depth of the permanent pool. Because surface area is dependent upon average depth, and average depth is dependent upon surface area, it becomes necessary to iterate pond dimensions to find an acceptable solution. This is an easy task with a spreadsheet. [Figure 1] shows the spreadsheet values for this basin. A best guess is made for lengths and widths at the permanent pool elevation. The spreadsheet then calculates incremental contour areas and prismoidal volumes as well as stage and storage values. The following values are extracted from the spreadsheet to calculate average depth: Permanent Pool Area (PP) = 9,250 sf Bottom of Shelf Area (BS) = 6,974 sf Bottom of Pond Area (BP) = 1,764 sf Depth from Bottom to Shelf (Depth)= 4.5 feet Nov 14, 2011 Page 2 of 6 Project # 08018 Gooden & Associates, Inc. Average Depth is calculated using method 2 in the Manual. da = [0.25 x (1 + PS)] + I I BS z BP x /D Sth\ da = r0.25 x (1 + 6974 9250)J + [I 6974 Z 1764\ x (6974)J = 4.5 3.3 feet We use Table 10-1 in the Manual to find the ratio of surface area to drainage area. Table 10-1 is fed into the spreadsheet and a ratio is found by interpolation (double interpolation if necessary). This is shown in [Figure 2]. [Figure 2] - Double Interpolation of Table 10-3 3.3' 1 3.0 4.0 5.0 6.0 7.0 0.20 0.97 0.79 0.70 0.59 0.51 0.30 1.35 1.08 0.97 0.83 0.70 Interpolated SA to DA Ratio = 1.67% SA=DAx0.0167 SA = 551,700 x 0.0167 = 9213 sf The total permanent pool surface area shown in [Table 11 is acceptable. Regulations also require that the forebay contain 20% of the permanent pool volume. The chosen dimensions yield a forebay storage of 4271 cf and a total permanent pool storage of 22114 cf. The forebay contains 19.3% of the total volume and is sized appropriately. Nov 14, 2011 Page 3 of 6 Project # 08018 Gooden &Associates, Inc. Temporary Pool Regulations require treatment of the first one inch of rainfall because most common surface pollutants are carried away within this volume. Surface characteristics reduce the treatment depth from one inch of rainfall to some particular depth of runoff. This runoff depth — not the rainfall depth — is then applied to the Drainage Area to compute the runoff volume that must be treated. The Simple formula described in Chapter 3 of the Manual is used to calculate the runoff depth given impervious percentage and drainage area. The depth is multiplied by the total area and then divided by 12 to get cubic feet of treatment volume (WQV). Impervious Percentage (1)= 40.9% Drainage Area (DA) = 551,700 sf Treatment Depth (di) = (0.05+0.9x /)x 1 inch rainfall = 0.418 in dT x DA 0.418 x 551700 WQV = 72 = 12 = 19,215 cf [Figure 1] shows that at stage 6.6, the temporary pool will hold the required volume. Draw -Down Orifice In order to maximize filtration, the temporary pool volume should be completely drained no sooner than 2 days. However, maximum inundation should be limited to 5 days to reduce adverse affects on plant life and to free up space for the next storm. Regulations also require that the treatment volume be discharged at a rate equal to or less than the 1-yr 24-hr pre -development peak discharge rate. The standard Orifice Equation is used to determine average flow. The treatment volume is divided by the average flow to find the draw -down time: Coefficient of Discharge (C) = 0.614 Orifice Diameter (D) = 1.0" (0.083 feet) Nov 14, 2011 Page 4 of 6 Project # 08018 Gooden & Associates, Inc. O, 0Zrtf 2= 0,6/q C)'2-1C 2 z,Z)o,S3c U.u77� Number of Holes = 4 _ JCY Driving head (H„) _ (212.13210.$) = 0.53 ft jj�� D a Q=14)xCx�T x 2x32.2xHo�L � �5J✓ r\� � Z \ Q=4x0.614x (rcx04 x 2x32.2x0.53=0.079R3/sec Vol 1 19215 1 Q Drawdown Time = x 60 = x = 2.8 days 60 x 60 x x 60 x 24 0.079 24 The Rational Method is used to determine the pre -development flow: Pre -development C = 0.20 Post -development C = 0.50 Drainage Area = 12.67 acres 1-yr 24-hr storm intensity = 0.13 in/hr Pre -development Q = C i A = 0.20 x 0.13 x 12.67 = 0.33 ft3/sec Post -development Q = C i A = 0.50 x 0.13 x 12.67 = 0.82 ft3/sec Flow through the orifice is 0.079 fit'/sec, which is less than the pre -development flow. The orifice will draw -down the temporary pool volume in 2.8 days, which is meets the 2-5 day restriction. Therefore, four 1.5 inch orifice is adequate for this pond. Nov 14, 2011 Page 5 of 6 Project # 08018 Gooden & Associates, Inc. Level Spreader The riser structure should be designed such that the flow to the level spreader is as near to 2 cfs as possible while keeping the drawdown time within the 2-5 day range. The pond was routed and the following hydrographs show the inflow into the pond and the outflow through the riser to the level spreader. The maximum flow to the level spreader is 1.26 cfs. The down slope vegetated filter is wooded. The level spreader must be 50 feet long per cfs. L=SOx1.26cfs=63ft Nov 14, 2011 Page 6 of 6 Project # 08018 Gooden & Associates, Inc. Wet Detention Basin 2 & Level Spreader Heathcliff Calculations John E. Prevette 111, P.L.S. L-4905 Gooden and Associates, Inc. 1745 Cypress Lakes Rd Hope Mills, NC 28348 910-223-7766 jprevette@goodensurveying.com Method - Find permanent pool dimensions: o Iterate dimensions to achieve an acceptable surface area to drainage area ratio - Find temporary pool dimensions: o Calculate the required treatment volume o Find the max stage needed to store the treatment volume - Find temporary pool draw -down orifice dimensions o Iterate orifice dimensions to find an acceptable flow that will drain the treatment volume in 2-5 days o The orifice flow must not exceed the pre -development 1-yr 24-hr peak flow - Find level spreader dimensions: NOTE: All formulas are taken from the Stormwater BMP Manual Given Description Area (sq ft) % of Total Rational C Lot built -upon area 234,500 28.4% 0.9 Street area 95,000 11.5% 0.9 Sidewalk area 9,900 1.2% 0.9 Yards area 485,000 58.8% 0.2 Total Drainage Area 824,400 100.0% 0.5 Impervious Percentage =41.2% Tc = 15 minutes Rational i10yr = 5.34 in/hr 10-yr 24-hr precip = 5.52 in Rational i25yr = 5.98 in/hr 25-yr 24-hr precip = 6.69 Nov 14, 2011 Page 1 of 6 Project # 08018 Gooden 8 Associates, Inc. Temp Pool Top Shelf Perm Pool Btm Shelf Btm Forebay Btm Pond [Figure 1] - Pond Dimensions o m < G a n a a a a w a a T a 2 c_ ¢ n > W m ni o a u u 0 > c ° m F w w N LL 0 C > d > d N F H N Q N N 218.9 8.9 2542 2128 13571 2987 2466 14778 17463 54416 18240 69194 29474 217.5 7.5 1749 1419 11400 812 654 9324 5092 36953 14568 46277 6557 217 7.0 1500 1200 9000 711 566 7859 3942 31861 11700 39720 216.5 6.5 1344 1064 6800 3779 2804 6582 27920 27920 9208 34502 210.0 0.0 44 24 2016 0 2084 0 210.0 0.0 2016 0 2016 Permanent Pool Pollutant removal within a wet detention basin is dependent upon two integral components — average depth and permanent pool surface area. Average depth, is a function of the surface area, total depth, and side slopes, and must be recalculated if any of these dimensions change. Surface area is directly proportional to the total drainage area by a factor found in a table in the Manual. To find the factor in the table, the designer must know the percent of impervious area and the average depth of the permanent pool. Because surface area is dependent upon average depth, and average depth is dependent upon surface area, it becomes necessary to iterate pond dimensions to find an acceptable solution. This is an easy task with a spreadsheet. [Figure 1 ] shows the spreadsheet values for this basin. A best guess is made for lengths and widths at the permanent pool elevation. The spreadsheet then calculates incremental contour areas and prismoidal volumes as well as stage and storage values. The following values are extracted from the spreadsheet to calculate average depth: Permanent Pool Area (PP) = 11,700 sf Bottom of Shelf Area (8S) = 9,208 sf Bottom of Pond Area (BP) = 2,016 sf Depth from Bottom to Shelf (Depth)= 6.5 feet Nov 14, 2011 Page 2 of 6 Project # 08018 Gooden & Associates, Inc. Average Depth is calculated using method 2 in the Manual. BS day = 10.25 x I 1 + PP/1 + L\BS Z BP/ x \DBS h/J da = 10.2S x (1 + 9200/1 t [(9208 Z 2016\ x (925 - 4.4 feet We use Table 10-1 in the Manual to find the ratio of surface area to drainage area. Table 10-1 is fed into the spreadsheet and a ratio is found by interpolation (double interpolation if necessary). This is shown in [Figure 21. [Figure 2] - Double Interpolation of Table 10-3 4.4' 1 3.0 4.0 5.0 6.0 7.0 0.20 0.97 0.79 0.70 0.59 0.51 0.30 1.35 1.08 0.97 0.83 0.70 Interpolated SA to DA Ratio = 1.39% SA=DAx0.0139 SA = 824400 x 0.0139 = 11,459 sf The total permanent pool surface area shown in [Table 1] is acceptable. Regulations also require that the forebay contain 20% of the permanent pool volume. The chosen dimensions yield a forebay storage of 7,859 cf and a total permanent pool storage of 39,720 cf. The forebay contains 19.8% of the total volume and is sized appropriately. Nov 14, 2011 Page 3 of 6 Project If 08018 Gooden &Associates, Inc. Temporary Pool Regulations require treatment of the first one inch of rainfall because most common surface pollutants are carried away within this volume. Surface characteristics reduce the treatment depth from one inch of rainfall to some particular depth of runoff. This runoff depth — not the rainfall depth — is then applied to the Drainage Area to compute the runoff volume that must be treated. The Simple formula described in Chapter 3 of the Manual is used to calculate the runoff depth given impervious percentage and drainage area. The depth is multiplied by the total area and then divided by 12 to get cubic feet of treatment volume (WQ1). Impervious Percentage (n = 41.2% Drainage Area (DA) = 824,400 sf Treatment Depth (di) = (0.05+0.9x I)x 1 inch rainfall = 0.421 in dr x DA 0.421 x 824400 WQV 12 12 = 28,890 cf [Figure 1] shows that at stage 8.9, the temporary pool will hold the required volume. Draw -Down Orifice In order to maximize filtration, the temporary pool volume should be completely drained no sooner than 2 days. However, maximum inundation should be limited to 5 days to reduce adverse affects on plant life and to free up space for the next storm. Regulations also require that the treatment volume be discharged at a rate equal to or less than the 1-yr 24-hr pre -development peak discharge rate. The standard Orifice Equation is used to determine average flow. The treatment volume is divided by the average flow to find the draw -down time: Coefficient of Discharge (C) = 0.614 Orifice Diameter (D) = 1.0" (0.083 feet) Nov 14, 2011 Page 4 of 6 Project # 08018 Gooden & Associates, Inc. Number of Holes = 4 Driving head (Ho) = t21tl'93Z'7'01 = 0.63 ft r2 Q=7CxCx(x 2x32.2x110 /n x 0.0832 Q=4x0.614x 4 x Nf2x32.2x0.63=0.086ft3/sec Vol 1 28890 1 Drawdown Time = Q x 60 x 60 x 24 0.086 x 60 x 60 x 24 = 3.9 days The Rational Method is used to determine the pre -development flow: Pre -development C = 0.20 Post -development C = 0.50 Drainage Area = 18.93 acres 1-yr 24-hr storm intensity = 0.13 in/hr Pre -development Q = C i A = 0.20 x 0.13 x 18.93 = 0.49 ft3/sec Post -development Q = C i A = 0.50 x 0.13 x 18.93 = 1.23 ft3/sec Flow through the orifice is 0.086 ft3/sec, which is less than the pre -development flow. The orifice will draw -down the temporary pool volume in 3.9 days, which is meets the 2-5 day restriction. Therefore, four 1 inch orifices are adequate for this pond. Nov 14, 2011 Page 5 of 6 Project # 08018 Gooden 8 Associates, Inc. Level Spreader The riser structure should be designed such that the flow to the level spreader is as near to 2 cfs as possible while keeping the drawdown time within the 2-5 day range. The pond was routed and the following hydrographs show the inflow into the pond and the outflow through the riser to the level spreader. The maximum flow to the level spreader is 1.44 cfs. The down slope vegetated filter is wooded. The level spreader must be 50 feet long per cfs. L = 50 x 1.44 cfs = 72 ft [Figure 3 - Hydrographs) Nov 14, 2011 Page 6 of 6 Project # 08018 Gooden & Associates, Inc. 0I CAR4 STATE OF NORTH CAROLINA ANNUAL REPORT INCLUDE 420.00 FILING FEE PAYABLE TO N.C. SECRETARY '�, OF STATE. �„-..o 92 24 10288 CORP Io- 0 0 1 7 4 2 2 FILING NO- A 0 0 2 STATE OF INC- HC 1. NAME OF CORPORATION, PRINCIPAL OFFICE ADDRESS BROADNELL LAND COMPANY 903 MAY STREET, PO BOX 53587 FAYETTEVILLE NC 28305 2. REGISTERED AGENT AND HAILING ADDRESS BONN B BROADHELL 903 HAY ST. FA'iCTTE',/1LLC NC 20305 RUFUS L. EDMISTEN SECRETARY OF STATE ANNUAL REPORTS P.O. BOX 29525 RALEIGH, NC 27626-0525 19191 733-4201 Q� i10 REPORT DUE DATE- 10-01-1992 V FUD. fl,' iAS L FC3M6M NOTICE DATE- 07-31-1992 " "A DATE OF INC- 07-16-1979 ENTER PRINCIPAL OFFICE ADDRESS CHANGE HERE - ENTER AGENT NAME AND MAILING ADDRESS CHANGE HERE - 3. STREET ADDRESS OF REGISTERED OFFICE ENTER STREET ADDRESS CHANGE HERE - 903 HAY ST. FAYETTEVILLE NC 28305 COUNTY - CUBERLAND qi. IF REGISTERED AGENT CHANGED, SIGNATURE OF MEN AGENT 1310 THE C TITN Cd13EHT TO "POINTNENTI 5. FEDERAL EMPLOYER ID NUMBER ENTER FEDERAL ID NUMBER CHANGE HERE - 6. ENTER NAME,BUSINESS ADDRESS OF PRINCIPAL OFFICERS HERE - NAME- Dohn B. Broadwell ADDR- 903 Hay Street. PO Box 53587 TITLE- President CITY Fayetteville, NC ST- ZIP- 28305 NAME Dohn B. Broadwell, Jr. TITLE- ADDR- 903 Hay Street, P�Box IN57 V President CITY Fayetteville, NC 28305 NAME- Leon E. Brown ADDR- 903 Hay Street, PO Box 53587 TITLE- V. President/Secretary CITY- Fayetteville, NC ST- ZIP- 28305 ADDR- TITLE- CITY- ST- ZIP- 7. ENTER NAME AND BUSINESS ADDRESS OF DIRECTORS HERE - ATTACH 2ND PAGE IS NECESSARY NAME- Dohn B. Broadwell ADDR- 903 Nay Street PO Box S3587 CITY- Fayetteville, NCsT- ZIP- 28305 NAME- Leon E. Brown ADDR- 903 Hay Street PO Box 53SR7 CITY- Fayetteville, NC ST- zIP- 28305 NAME- ADDR- CITY- ST- ZIP- 8. BRIEFLY DESCRIBE THE NATURE OF THE BUSINESS- Single-family residential land development 9. OATE- 8/24/92 M SIONED OY OFFICER OF CPro 11m) NPNE- Limon 8 D--.— TITLE- k, President TWE OR PRINT NNE u!D TITLE This form should be return 0d by the DUE GATE shown above with a check for S10.00 to: SECRETARY OF STATE, ANNUAL REPORT SECTION, POST OFFICE 29525, RALEIGH NC 27626-0525. CAR4 8701 0151 0108101 e68151 FILED CUMBERLAND COUNTY NC J. LEE WARREN. JR. REGISTER OF DEEDS FILED Aug 15, 2011 AT 12:17:00 pm BOOK 08701 START PAGE 0151 END PAGE 0153 INSTRUMENT# 26391 RECORDING $25.00 EXCISE TAX $2,450.00 KSJ NORTH CAROLINA GENERAL WARRANTY DEED Excise Tax $2,450.00 M8 P File # 1506-6 Parcel Identifier No.: 9476-98-5356 Prepared by/Ma44A&uerc4iRff4n: Rebecca F. Person, 1308 Fort Bragg Rd., Ste 101, Fayetteville, NC 28305 Brief Description for the Index: 42.80 ACs Carter Land ?, flvaw �r /u rgMr 37 %-o Ckvnl10-Y THIS DEED made this August , 2011 by and between: GRANTOR GRANTEE GT RECREATION, INC., a North Carolina I BROADWELL LAND COMPANY, a North Carolina corporation corporation Mailing Address: 8623 Galatia Church Rd. Fayetteville, NC 28304 party: name, Mailing Address: PO BOX 53587 Fayetteville, NC 28305 Property Address: 42.80 AC Carter Land Fayetteville, NC The designation Grantor and Grantee as used herein shall include said parties, their heirs, successors, and assigns, and shall include singular, plural, masculine, feminine or neuter as required by context. WITNESSETH, that the Grantor, for a valuable consideration paid by the Grantee, the receipt of which is hereby acknowledged, has and by these presents does grant, bargain, sell and convey unto the Grantee in fee simple, all that certain lot or parcel of land situated in or near the City of Fayetteville, Cross Creek Township, Cumberland County, North Carolina and more particularly described as follows: SEE EXHIBIT A ATTACHED HERETO AND MADE A PART HEREOF. The property hereinabove described was acquired by instrument recorded in Book 7169, Page 887, Cumberland County, North Carolina, Registry. A map showing the above described property is recorded in Plat Book 89, Page 15, Cumberland County, North Carolina, Registry. r . . 8701 0152 BK08101 PG0152 TO HAVE AND TO HOLD the aforesaid lot or parcel of land and all privileges and appurtenances thereto belonging to the Grantee in fee simple. And the Grantor covenants with the Grantee, that Grantor is seized of the premises in fee simple, has the right to convey the same in fee simple, that title is marketable and free and clearof all encumbrances, and that Grantor will warrant and defend the title against the lawful claims of all persons whomsoever except for the exceptions hereinafter stated. Title to the property hereinabove described is subject to the following exceptions: utility easements, permits, and rights of way as the same may appear of record IN WITNESS WHEREOF, the Grantor has hereunto set his hand and seal effective the day and year first above written. If initialed, the property includes the primary residence of at least one of the Grantors. (NC GS,¢ 105-317.2) By: GT Recreation, I C. �o _ _ (SEAL) N e: J seph H. Gillis Title: President STATE OF NORTH CAROLINA COUNTY OF CUMBERLAND I certify that the following person(s) personally appeared before me this day and 1 have personal knowledge of the identity of the principal(s) or have seen satisfactory evidence of the principal's identity, by a current state or federal identification with the principal's photograph in the form of a driver's license or a credible witness has sworn to the identity of the principal(s); each acknowledging to me that he or she voluntarily signed the foregoing document for the purpose stated therein and in the capacity indicated: Name of Principal: Joseph H. Gillis, President. Date: �j `y4"/le _ TT M ry CM C. M as 0 a..- Printed Name of Notary Public My Commission Expires: 05/12/15 ..wR"'�I�$p Luc Cj 2 (N.P. SEAL) 8701 0153 er<08101 Pc0153 NORTH CAROLINA: CUMBERLAND COUNTY: CROSS CREEK TOWNSHIP: CUMBERLAND COUNTY 2011 PIN: 9476-98-5356 Being all of 42.80 acres, in a subdivision known as Property of Merle C. Heath, according to a plat of same being duly recorded in Book of Plats 89, Page 15, Cumberland County Registry, North Carolina. Being the same property conveyed by a deed dated 03/07/2006, recorded 03/09/2006, in Book 7169, pages 887-890, Cumberland County Registry, from Merle Carter Heath, Single, to GT RECREATION, INC. Flossie Koonce Carter died 07/09/1991 (Cumberland County Death Book 172, page 360, and by her Last Will and Testament dated 05/13/198, admitted to probate in Cumberland County Estate File 91-E-638, said property was devised to her daughter, Merle Caner Heath. Marshall Lee Carter died 11 /26/1973 (Cumberland County Death Book 105, page 182), and Flossie Carter became the owner of said properties as the surviving tenant by the entirety Lot 1, 21 '/4 acres, of the Bettie Carter Gibson Estate Division per plat recorded in Plat Book I I at page 6, Cumberland County Registry allotted to Marshall Carter and wife, Flossie Carter, by the Report of Corunissionets in Special Proceeding "Marshall and Flossie Carter et al. vs. Ola Carter and Duncan E. Blue et al." dated 12/2911944, and confirmed by the Clerk of Superior Court on 01/10/1945, and recorded 01/20/1945 in Book 475, pages 14, Cumberland County Registry. Lot 3, 33 acres, of the Bettie Carter Gibson Estate Division per plat recorded in Plat Book 11 at page 6, Cumberland County Registry allotted to Lelia Carter Morgan, by the Report of Commissioners in Special Proceeding "Marshall and Flossie Carter et al. vs. Ola Carter and Duncan E. Blue et al." dated 12/2911944, and confirmed by the Clerk of Superior Court on 01/10/1945, and recorded 01120/1945 in Book 475, pages 1-4, Cumberland County Registry. Said lot 3 was conveyed by a deed dated 0120/1945, recorded 0129/1945 in Book 476, page 60, Cumberland County Registry, from Lelia Carter Morgan, Single, to Marshall Carter and wife, Flossie Carter. HAL OWEN & ASSOCIATES, INC. SOIL & ENVIRONMENTAL SCIENTISTS P.O. Box 400,266 Old Coats Road Lillington, NC 27546-0400 Phone (910) 893-8743 / Fax (910) 893-3594 www.halowensoil.com 26 October 2010 Mr. Joe Gillis 8623 Galatia Church Road Fayetteville, NC 28304 Reference: Soil Scientist Investigation Heatheliffat West Point Dear Mr. Gillis, A site investigation has been conducted for the above referenced property, located on the western side of Cliffdale Road, Seventy -First Township, Cumberland County, North Carolina. 'rhe purpose of this investigation was to provide a general characterization of the soils in the area proposed for a stormwater management facility, including a determination of the depth to evidence of a seasonal high water table and estimation of the permeability of the various soil layers. In -situ hydraulic conductivity testing was also conducted at proposed basin one. All soil determinations were made in accordance with the "North Carolina Stormwater Best Management Practice Manual' and Administrative Code Section: 15A NCAC 2H A000. The materials at the site were described in accordance with the USDA Field Bookfor Describing and.Sampling Soils. This report represents my professional opinion as a Licensed Soil Scientist. SOIL PROFILE DESCRIPTIONS Soil profile descriptions were collected at the site at the locations indicated in Figure 1. Hand powered soil auger borings were utilized to make observations. The soil infiltration/permeability rates for the various soil horizons are estimations based on professional interpretation and not in -situ measurements. In -situ testing was conducted and is described in the following section "Hydraulic Conductivity Testing". The following narrative describes the findings at the site and provides some insights and recommendations. A full description of each observation can be found attached to this report. Profile 1: An auger boring was dug to a depth of 72 inches below ground surface in the bottom of the existing sediment trap. Soil morphological characteristics indicating a seasonal high water table (SIiwn were observed at 62 inches below surface, which correlates to an elevation of 210.16 feet. Estimated infiltration rates (permeability) range from 1.0 in/hr in the sandy clay loam layer between 18 and 30 inches to as high as 3.0 in/hr in the sandy loam textured soils observed between 30 and 62 inches below surface. This site appears well suited for the proposed activity but the attached hydraulic conductivity data indicates that an infiltration rate of 1.8 in/hr should be utilized for design purposes. Soil Science Investigations • Wetland Delineations, Permitting, and Consulting HAL OWEN & ASSOCIATES, INC. Figure 1. Locations of Soil Profile Descriptions Soil Profile #3 Soil Profile #2 Soil Profile#I 9@I BFiI Hk71 al BHI NRl 901 Dal UM ae1 501 Soil Science Investigations • Wetland Delineations, Permitting, and Consulting HAL OWEN & ASSOCIATES, INC. Profile 2: An auger boring was dug to a depth of 60 inches below ground surface at a relatively undisturbed portion of the site. Soil morphological characteristics indicating a seasonal high water table (SHWT) were observed at 50 inches below surface. Estimated infiltration rates (permeability) range from 1.0 in/hr in the sandy clay loam layer between 18 and 45 inches to as high as 10.0 in/hr in the loamy sand textured soils observed at the surface. This site appears well suited for a wet detention pond. Profile 3: An auger boring was dug to a depth of 60 inches below ground surface in the bottom of a small sediment trap at proposed wet detention pond two. Soil morphological characteristics indicating a seasonal high water table (SHW"r) were observed at 36 inches below surface, which correlates to an elevation of approximately 217 feet. Estimated infiltration rates (permeability) range from 1.2 in/hr in the sandy clay loam layer at the surface to as high as 2.0 in/hr in the sandy loam textured soils observed between 30 and 54 inches below surface. This site appears well suited for a wet detention pond with the bottom of the basin located at approximately 217 feet. The adjacent wetlands are located at an elevation of approximately 212 to 214 feet, and it is not recommended that the basin be installed deeper than the ground elevation at the wetlands. HYDRAULIC CONDUCTIVITY TESTING Hydraulic conductivity testing was conducted using a Compact Constant Head Permeameter (CCI-IP), specifically an Amoozemeter, by using the shallow well pump -in technique as detailed in the user's manual. Hydraulic conductivity results can vary, even within similar soils, depending on the temperature and composition of the water used, climatic conditions, proximity of the test layer to the water table, and other factors. Therefore, the results from one boring may not be indicative of the entire area. A hydraulic conductivity test was performed at Soil Profile I within the sandy loam soil layer located above evidence of the seasonal high water table. A 3 cm radius bore hole was dug to a depth of 49 inches below ground surface. A constant head of water was established within the bore hole, and readings were made of the rate of water flow from the meter until it appeared that steady state had been reached. The Glover Solution was used to calculate the hydraulic conductivity, where Ksat = A * Q; A = {sinh-1 (H/r) — [(r/H)' + If' + r/H)/(21h); Q is the steady-state rate of water flow from the CCHP into the bore hole; H is the depth of water in the bore hole; and r is the radius of the bore hole. The hydraulic conductivity test shows the soil layer transmitted water at a rate of 1.8 inches per hour. For detailed information about the test, please refer to the attached Ksat field datasheet. Soil Science Investigations * Wetland Delineations, Permitting, and Consulting HAL OWEN & ASSOCIATES, INC. CONCLUSION The two sites investigated appear well suited for storm water management devices as described above. 1 appreciate the opportunity to provide this service and trust that you will feel free to call on me again in the future. If you have any questions or need additional information, please contact me at your convenience. Sincerely, Hal Owen Licensed Soil Scientist Soil Science Investigations • Wetland Delineations, Permitting, and Consulting HAL OWEN & ASSOCIATES, INC. SOIL PROFILE DESCRIPTIONS FOR STORMWATER MANAGEMENT DEVICES CLIENT: Joe Gillis OWNER:® AGENT:❑ PHONE: PROJECT NAME: Healheliff at Westooint PROPOSED I:ACI L I'I'Y:_ stormwater management devices LOCATION OF SITE: COUNTY: Cumberland PROPERTY SIZE: (VALUATED BY: Hal Owen. NC Licensed Soil Scientist DATE EVALUATED: EVALUATION METHOD: Auger Boring ®, Pit ❑ PROFILE: I HORIZON DEPTH MATRIX MOTTLES TEXTURE. STRIJCTURF; CONSIS- PERMEABIL NOTES TENCE ify IN/HR 0-18 yellowish brown _ SCI, 2 M SEK FR 1,5 surface cut light I8-30 yellowish - SCL I M SBK PR 1.0 brown yellowish few light 30-62 brown yellowish SL 2 M OR FR 5.0 brown 62-72 white/stripped LS SG L AW'r >72 inches SHWT 62 inches SLWI' SLOPE DRAINAGE SOIL SERIFS VEGETATION COMMENTS. boring located in the bottom of an existing sediment trap PROFILE: 2 HORIZON DEPTH MATRIX MOTTLES 'I FX'IURE S'I"RUC "FURI7 CONSIS- 'TENCE PERMEABIL NOTES I'rY (IN/HR 0 I1 yellowish blown _ I'S I M GR VFR 10.0 II -IS Yellowish brown _ LS IMGR VFR 10.0 18-45 reddish brown - SCL 2 M SBK FI L0 yellowish 45-50 reddish brown brown and pale SL 2 M SBK FR 20 brown 50-60 gray/stripped many others sL 2 M S13K FR AWT >60 inches SHw'1' 50 inches SLWI' SLOPE DRAINAGE SOIL SERIES VEGETATION COMMENTS: natural profile Soil Science Investigations • Wetland Delineations, Permitting, and Consulting HAL OWEN & ASSOCIATES, INC. SOIL PROFILE DESCRIPTIONS PROFILE: 3 HORIZON DE1111 (IN) MATRIX MOTTLES 'TEXTURE STRUCTURE CONSIS- TENCE PERMEAnIL HY(IN/HR NO I'ES 0-30 reddish brown - Sc 2 M S13K FI 12 surface cut 30-36 reddish brown many red SI, IMSnK FR 20 36-54 variegated gray red pink SI, I M SnK PR 54-60 gray red and others SC M VPI saturated AW'I 54 inches SHW'r 36 inches sLW'1' SLOPE DRAINAGE SOIL SERIES VEGETATION COMMENTS: auger boring in bottom of existing small sediment trap Sail Science Investigations • Wetland Delineations, Permitting, and Consulting HAL OWEN & ASSOCIATES, INC. LEGEND OF ABBREVIATIONS FOR SOIL PROFILE DESCRIPTIONS TEXTURE MOIST CONSISTENCE S - Sand L - Loose LS - Loamy Sand VFR - Very Friable SL - Sandy Loam FR - Friable L - Loam FI - Firm SCL - Sandy Clay Loam VFI - Very Firm CL -Clay Loam EFI - Extremely Firm SiL -Silt Loam Si - Silt SiCL- Silt Clay Loam SC -Sandy Clay AWT —Apparent Water Table C -Clay SHWT —Seasonal High Water Table SiC -Silty Clay SLWT —Seasonal Low Water Table O - Organic MOTTLES f —few I - fine F - Faint c —common 2 - medium D - Distinct m — many 3 - coarse P - Prominent STRUCTURE 0 - structureless VF -very fine G - Single Grain I - weak F - fine M - Massive 2 - moderate M - medium CR - Crumb 3 - strong C - coarse GR - Granular VC - very coarse SBK - Subangular Blocky ABK - Angular Blocky PL - Platy PR - Prismatic Soil Science Investigations • Wetland Delineations, Permitting, and Consulting 1-IAL OWEN & ASSOCIATES, INC. Wr« le.d y t N1 l Project: _To e 6, '//, -5- : fJ,r ah�� Ksat ID: I Ksat DATA SHEET Measurement #: 1 Date: oil Q_J Investigator: lit ir Pie W Location: Weather - Condition: 5 n ot- . Temp: G 3a 1' Water - Source: &,En ' Co. ' -lan Temp: -7 0' -- Soil Horizon: Layer Depth and Thickness: 30 - &.1 ` Slope: Cw Hy I 2 3 4 4•H1 1.50w10pP350) A�� calculate constant -head tube setting: cm Hole Depth Distance between reference level + 10 and top of hole [-IMrn on flat sites] Distance from bottom of hole = 34.5 to reference level (D) Desired depth of water (H) , [> 15cm] Constant -head tube setting (HI) =E71 Start Saturation: ]0:30 Measured (Actual) water level in hole: [ Brd ern Hole radius (r): .. 3 eM Ksat=AXQ' Use Table 2 to determine A = L7• 0150,'1,71 Cm'2 Q from other side = 1.ti 36 40 cm3/day Ksat = 1 [ [ A U cm/day [ . S ' rne"neSAr Ksat data sheet pg 1 /2 Soil Science Investigations • Wetland Delineations, Permitting, and Consulting HAL OWEN & ASSOCIATES, INC. H Clock Reservoir Change Time Reading in time Change Flow in water Volume level (cm X C.F.) (1440 mirVday) CM h : min cm min cm Clint CM'/min em3/day 8.0 (o,'3: a(4;5 Z I q(o5(o0 1V,) gao igoo aa, (000 yao 1q0.0 aoIt( iD:u'8 Ia•a _3 la%5 18(o4i.8o I �.a ID:53 r✓:B S G,q 6 7 134A 1 9 3 S 3t0 I �, oa ya.q �fi.c,49 yy�,�er - V il'.,aN o.5 ..:.a �.�1 a5a ►ato 181y*�o 11,0(0 3s, `{ oZ a• I IW,5 I i0, a5 158-7(.a I1'.08 3(o:I.:.....<a......:2 3 q),5 (a0,-75 1-13-880. ,I �•l0 33.9: a a.a a31 Ilsa I4�aao II'.►a . (, a a.3 a�t1,� 1ao.,s Veo o't-61. 115.5 1(e(o3ab %I(o �.�• a. a a. a a31 I►s.5 /�G3ao t►;14 as.o a a•a a3t J15.5. I&i;? ao I' ao ala,8 a a,a apt S. 16(s3ap „as ao,r a c.r. - 10 opmm How volume, multiply change m water level by the appropriate Conversion Factor. ION - 20 eon 2-ON = 5 <m Average of last few measurements: 10100 c n.3/d Ksat data sheet pg 2/2 Soil Science Investigations • Wetland Delineations, Permitting, and Consulting