Loading...
HomeMy WebLinkAboutSW7110716_HISTORICAL FILE_20110727STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW 111614 DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE `L 0 YYYYMMDD EXPRESS Ow LIMITED LIABILITY COMPANY ANNUAL REPORTJUL 2 7 2011 NAME OF LIMITED LIABILITY COMPANY: Realty VANC, LLC NYC DENR SECRETARY OF STATE ID NUMBER: 1188296 STATE OF FORMATION: DE Filing Of oa Use Only REPORT FOR THE YEAR: 2011 SECTION A: REGISTERED AGENT'S INFORMATION Changes 1. NAME OF REGISTERED AGENT: Christopher J. Vaughn 2. SIGNATURE OF THE NEW REGISTERED AGENT: 3. REGISTERED OFFICE STREET ADDRESS & COUNTY 235 N. Edgewood Street Greensboro, NC 27401 Guilford SECTION B: 1. DESCRIPTION OF NATURE OF BUSINESS: 2. PRINCIPAL OFFICE PHONE NUMBER: 4. PRINCIPAL OFFICE STREET ADDRESS & COUNTY 263 Wagner Place Memphis, TN 38103 Shelby SECTION C: I NAME: TITLE: ADDRESS: SIGNATURE CONSTITUTES CONSENT TO THE APPOINTMENT 4. REGISTERED OFFICE MAILING ADDRESS P.O. Box 540 Greensboro, NC 27402 3. PRINCIPAL OFFICE EMAIL: 5. PRINCIPAL OFFICE MAILING ADDRESS 263 Wagner Place Memphis, TN 38103 (Enter additional Managers/Members/Organizers in Section E.) NAME: TITLE: ADDRESS: NAME: TITLE: ADDRESS: SECTION D: CERTIFICATION OF ANNUAL REPORT Section D must be completed in its entirety by a person/business entity. SIGNATURE Form must be signed by a Manager/Member listed under Section C of this form. Print or Type Name of ManagerlMember DATE TITLE THIS ENTITY DOES NOT QUALIFY FOR THE 2011 ANNUAL REPORT FILING FEE EXEMPTION GRANTED UNDER SL2010-31 SUBIALTSHL5ANNUALRPPnEI3 TF1TBE.BEQUIREQ.FJLINGFEEDF$20 MAIL TO: Secretary of State, Corporations Division, Post Office Box 29525, Raleigh, NC 27626-0525 CivilDesigns, P.A. 3817-C Lawndale Drive Greensboro, North Carolina 27455 Telephone (336) 282-5542 FAX (336) 282-5592 Transmittal Letter To: NCDENR Express Permitting Section Attn; Lyn Hardison 943 Washington Square Mall Washington, NC 27889 Project: Wendy's Havelock US Highway 70 Havelock, Craven County, NC We'Cransmit: ( X) herewith ( ) under separate cover For Your: ( X) approval ( ) review & comment ( ) use The Following Consulting Civil and Environmental Engineering Date: July 27, 2011 Project No.: 11180 EXPRESS Copies Date Description 4 Site Drawings 4 Calculations 2 Financial Responsibility Form 2 Stormwater Management Permit Application Form 1 Application Fee- Express Review S4000.00 1 Application Fee- Erosion Control $130.00 2 Supporting Documentation Remarks: Erosion control plan & stormwater plan for review and approval. Please let us know if you require any further information. Thank you. Copies to: Sincerely, V. Broderick, PE & I V STORM DRAINAGE EXPRESS and STORMWATER WETLANDS [JUL 27 2011 DESIGN CALCULATIONS NC ®ENR for Wendy's Havelock Owner: Realty VANC 263 Wagner Place Memphis, TN 38103 Prepared by: CivilDesigns, P.A. 3817-C Lawndale Drive Greensboro, NC 27455 (136)282-5542 _ 12283 :�Cc` •_ 6Q cj .pBR,oq�e.,,. Project No. 11 ]80 July 27, 2011 NARRATIVE: This project involves the construction of a new 3,940 square foot restaurant with drive-thru. Parking areas and new access drives off of the adjoining service road will also be provided. Existing built -upon areas (the site is currently developed as self -serve car wash) including an existing structure, existing pavement, and other site features will be demolished/removed as a part of this project. Two BMP's, a grass swale and a stormwater wetlands, will be constructed to capture the runoff from new built -upon areas. A small amount of new built -upon area (portions of the new drives and sidewalks along the service road) will not drain to the BMP's. See plan sheet C3.1 for drainage area delineations. The elevation of these areas as they connect to the existing roadway are below the elevation of the BMP's making it not possible to get the runoff from these areas into the BMP's. SITE SUMMARY: Site Area: 1.4f acres Existing Zoning: H-C River Basin: Neuse, Slocum Creek (see Exhibit F) Existing Built -Upon Area (car wash) = 0.55 acres (39.3%) Proposed Built -Upon Area = 0.81 acres (57.9%) 3S 2w Proposed Stormwater Manangement Device: Grass swale and stormwater wetlands DESIGN PARAMETERS: Storm Drainage System: Designed to pass the 10 year, 24-hour storm Quality Control (BMP's): Treat first 1.5" of runoff Grass Swale: Designed per State BMP design guidelines 30% Total Nitrogen removal rate per Neuse Nitrogen Control River Basin Model Stormwater Program for The grass Swale was chosen to supplement the TN removal of the stormwater wetland to acheive required TN reductions. Stormwater Welland: Designed for 85% TSS removal per State BMP design guidelines 40% Total Nitrogen removal rate per Neuse River Basin Model Stormwater Program for Nitrogen Control The stormwater wetland was chosen for the high TN removal rate and the presence of a seasonally high water table (approximately 2' below existing grade, see Exhibit G) DESIGN SUMMARY: Pre -Developed Conditions: The site is currently developed as a self -serve car wash with an on -site BMP. The pre -developed condition was single family residential (see Exhibit A) Drainage Area- total site = 1.4 acres (no off -site) CN = 70 Tc = 5 min 1 year, 24-hour peak discharge = 2.0 cfs (see Exhibit A) Post -Construction Conditions: 0.90 acre of the total 1.4 acre site will drain to the grass Swale, with 0.74 of the 0.81 total built - upon area draining to the grass swale. -5 c 2 ?j! 1.15 acre of the total 1.4 acre site will drain to the stormwater wetland, with 0.74 of the 0.81 total built -upon area draining to the stormwater wetland. 0.07t acre of new built -upon area, including the required public sidewalk, will not drain to stormwaterwetlands due to site elevations. The elevation of these areas as they connect to the existing roadway are below the elevation of the stormwater wetland making it not possible to et S« the runoff from these areas into the stormwater wetland. % mo /d [� PI -Oa The required water quality volume will be stored within the stormwater wetland. The water be(-,-- quality volume will be discharged through a 1" orifice on the outlet structure which will drai the <✓L nl �i` volume in 2-5 days. / Drainage Area to Grass Swale = 0.90 acres (no off -site) Built -upon are draining to wetland = 0.74 acre CN = 94 Tc = 5 min 10 year, 24-hour peak discharge = 8.42 cfs (see Exhibit X) Channel slope = 0.3% Velocity = 1 fps Drainage Area to Wetland = 1.15 acres (no off -site) Built -upon are draining to wetland = 0.74 acre CN = 94 Tc = 5 min 1 year, 24-hour peak discharge (routed thru wetland) = 1.01 cfs (see Exhibit B) Drainage Area not draining to swale and wetland = 0.1 acres (no off -site) Built -upon area not draining to'swale and wetland = 0.03 acre CN=80 Tc = 3 min 1 year, 24-hour peak discharge = 0.77 cfs (see Exhibit C) Postdeveloped discharge for 1-year 24 hour storm event will be controlled to a rate less than the predeveloped rate for the site. Stormwater Wetland Summary-24-Hour Storm Duration Condition Q Q 1-yr, 24-hr 10-yr, 24-hr cfs cfs Pre -developed 2.00 >/ 6.71 Post Construction 1.01 5.15 (area draining to Swale & wetland) Post Construction 0.77 1.96 (area not draining to swale & wetland) Post Construction 1.78 ,// 7.11 Total V Maximum Water 28.5 J 29.4 Elev. Refer to the following calculations for detailed summaries. The calculations were performed on "Hydrographs 2004" by Intellisolve (see Exhibits A, B and C). Storm precipitation data taken from NOAA Atlas 14 for New Bern, NC (see Exhibit E). STORMWATER WETLANDS CivilDesigns, P.A. 3817-C Lawndale Drive Greensboro, NC 27455 (336)282-5542 PROJECT: Wendy's Havelock PROJECT NO: 11180 CHECKED BY: KVB LOCATION: US Highway 70 DATE: 27-Jul-2011 Havelock, NC REVISED: TOTAL SITE AREA = 1.40 WATERSHED = Neuse-Slocum Creek PROPOSED BUILT UPON AREA = 0.81 FUTURE BUILT UPON AREA = 0.00 TOTAL ON -SITE BUILT UPON AREA = 0.81 PERCENT BUILT -UPON = 57.86% ON -SITE DRAINAGE AREA TO WETLAND = 1.15 ON -SITE BUA TO WETLAND = 0.74 ONSITE % BUA FOR WETLAND SUB -BASIN = 64.35% OFF -SITE DRAINAGE AREA TO WETLAND = 0.00 TOTAL WATERSHED AREA TO WETLAND = 1.15 DISTURBED AREA = 0.00 TEMP. SED. STOR. USED Y/N N DESIGN DATA COMPOSITE B.U. %= 64.35 percent TEMPORARY WATER QUALITY 1.5 rainfall to be controlled WETLAND DATA ELEV. @ NORMAL POOL = 27.5 SURFACE AREA = 5062 ELEV. @ WEIR = 28.33 SURFACE AREA = 6017 ELEV. @ TOP OF RISER = 29.5 0 NORMAL POOL ELEVATION = SURFACE AREA PROVIDED = 27.50 5062 (� OK i5Rv= `" 9 IZV=U.CStG�� x 1-4 VOLUMEREQUIRED= v„iHeg v VOLUME PROVIDED V s 3G 3o x �d x Pvv xA 3�36 ELEV. @ BOT. OF TWO = 27.50 SURFACE AREA = 5062 / ELEV. @ TOP OF TWQ = 28.33 SURFACE AREA = 6017 VOLUME PROVIDED = 1 4598 CV a✓ OK CivilDesigns Page 1 of: ELEV. @ BOT. OF WATER QUALITY RELEASE HOLE = 27.50 MAXIMUM RELEASE RATE (DAYS) = 2 MINIMUM RELEASE RATE (DAYS) = 5 MAXIMUM HOLE SIZE (IN.)= 0.0110854482902541 1.43 MINIMUM HOLE SIZE (IN.)= 0.00443417931610165 0.90 CivilDesians Pave 2 of , p •' \� t� Pre -Developed Condition 2002 Aerial Photo ,q' ��.s..�.aa ..a.� �'+'n...-... ' use:, '`+er � .� •,fit � fit. �R� "'<y. �i.. �. n4,y �`vd qJV '�.e' % Ar.�+ L. n1� i �l �, ''�- °+an..�n "� 7 �v �y.. i y,4 i Hydrograph Return Period Recap Hyd. No. Hydrograph type (origin) Inflow Hyd(s) Peak Outflow (cfs) Hydrograph description 1-Yr 2-Yr 3-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr 1 SCS Runoff ------- 2.00 ------- ------- ------- 6.71 ------- ------- ------- Predeveloped Proj. file: Pre-developed_24hr_Site2.9pW Wednesday, Jul 27 2011, 6:09 AM Hvdraflow Hvdrnnranhs by Infelisnlve 2 Hydrograph Summary Report Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to peak (min) Volume (cult) Inflow hyd(s) Maximum elevation (ft) Maximum storage (cuft) Hydrograph description 1 SCS Runoff 2.00 3 720 I 4,657 ---- ------ ------ Predeveloped Pre-developed_24hr Site2.gpw Return Period: 1 Year Wednesday, Jul 27 2011, 6:09 AM Hvdraflnw Hvdmnranhc by Intelisnlve r Hydrograph Report Hydraflow Hydrographs by Intelisolve Hyd. No. 1 Predeveloped Hydrograph type Storm frequency Drainage area Basin Slope Tic method Total precip. Storm duration = SCS Runoff = 1 yrs = 1.40 ac = 0.0 % = USER = 3.45 in = 24 h rs Hydrograph Discharge Table Time -- Outflow (hrs cfs) 11.75 0.30 11.80 0.49 11.85 0.82 11.90 1.36 11.95 1.93 12.00 2.00 << 12.05 1.48 12.10 0.85 12.15 0.48 12.20 0.36 12.25 0.34 12.30 0.32 12.35 0.30 12.40 0.28 12.45 0.26 12.50 0.24 12.55 0.21 Wednesday, Jul 27 2011, 6:9 AM Peak discharge = 2.00 cfs Time interval = 3 min Curve number = 70 Hydraulic length = Oft Time of conc. (Tc) = 5.0 min Distribution = Type II Shape factor = 484 Hydrograph Volume = 4,657 tuft ( Printed values >= 10% W pp ) 4 Hydrograph SummaryReport Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to peak (min) Volume (tuft) Inflow hyd(s) Maximum elevation (ft) Maximum storage (tuft) Hydrograph description 1 SCS Runoff 6.71 3 717 15,164 ---- ----- ----- Predeveloped rP re-develorped_24 h r—S ite2. g pw Return Period: 10 Year Wednesday, Jul 27 2011, 6:09 AM Hvdraflnw Hvdrnnranhc by IntaImMio 5 Hydrograph Report Hydraflow Hydrographs by Intelisolve Hyd. No. 1 Predeveloped Hydrograph type Storm frequency Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 10 yrs = 1.40 ac = 0.0 % = USER = 6.47 in = 24 hrs Hydrograph Discharge Table Time -- Outflow (hrs cfs) 11.65 0.83 11.70 1.26 11.75 1.78 11.80 2.48 11.85 3.59 11.90 5.23 11.95 6.71 <c 12.00 6.55 12.05 4.64 12.10 2.58 12.15 1.41 12.20 1.06 12.25 1.00 12.30 0.93 12.35 0.87 12.40 0.80 12.45 0.73 ...End Wednesday, Jul 27 201116:9 AM Peak discharge = 6.71 cfs Time interval = 3 min Curve number = 70 Hydraulic length = Oft Time of conc. (Tc) = 5.0 min Distribution = Type II Shape factor = 484 Hydrograph Volume = 15,164 cuft ( Printed values>= 10%of Op.) Exhibit `B" Post -Developed Condition Draining to Wetland _ Hydrograph Return Period Recap Hyd. Hydrograph Inflow Peak Outflow (cfs) Hydrograph No. type Hyd(s) description (origin) 1-Yr 2-Yr 3-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr 1 SCS Runoff ----- 4.55 - ------- 9.00 ------- ------- ----- PostDeveloped 2 Reservoir 1 1.01 r ------- 5.15 ------- ------- ------- Wetland Routing Proj. file: Post- Developed_24hr_Site2—Rev.gpw Wednesday, Jul 27 2011, 6:11 AM Hvrimflow Hvdrnoranhs by Infelisolve Hydrograph Summary Report Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to peak (min) Volume (cuft) Inflow hyd(s) Maximum elevation (ft) Maximum storage (cuft) Hydrograph description 1 SCS Runoff 4.55 3 717 10,907 ---- ----- ------ PostDeveloped 2 Reservoir 1.01 3 729 10,797 1 28.54 6,078 Wetland Routing Post- Developed_24hr_Site2_Rev.gp Return Period: 1 Year Wednesday, Jul 27 2011, 6:11 AM Hvdraflow Hvdroarachs by Intelisolve Hydrograph Report Hydraflow Hydrographs by Intelisolve Hyd. No. 1 PostDeveloped Wednesday, Jul 27 2011, 6:11 AM Hydrograph type = SCS Runoff Peak discharge = 4.55 cfs Storm frequency = 1 yrs Time interval = 3 min Drainage area = 1.15 ac Curve number = 94 Basin Slope = 0.0 % Hydraulic length = Oft Tc method = USER Time of conc. (Tc) = 5.0 min Total precip. = 3.45 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Hydrograph Discharge Table Time -- Outflow (hrs cfs) 11.60 0.55 11.65 0.83 11.70 1.19 11.75 1.59 11.80 2.07 11.85 2.79 11.90 3.77 11.95 4.55 << 12.00 4.24 12.05 2.91 12.10 1.58 12.15 0.84 12.20 0.63 12.25 0.59 12.30 0.55 12.35 0.51 12.40 0.47 ..End Hydrograph Volume = 10,907 cuft ( Printed values = 10% of Op ) 3 Hydrograph Report 4 Hydraflow Hydrographs by Intelisolve Wednesday, Jul 27 2011, 6:11 AM Hyd. No. 2 Wetland Routing Hydrograph type = Reservoir Peak discharge = 1.01 cfs Storm frequency = 1 yrs Time interval = 3 min Inflow hyd. No. = 1 Reservoir name = Wetlands Max. Elevation = 28.54 ft Max. Storage = 6,078 cuft Storage Indication method used. Outflow hydrograph volume = 10,797 cult Hydrograph Discharge Table (Printed values >= 10% of op) Time Inflow Elevation Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D Exfil Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 12.00 4.24 28.41 0.24 0.02 ----- ----- 0.21 ----- ----- ----- ----- 0.23 12.05 2.91 28.49 0.71 0.02 ----- ----- 0.67 ----- ----- ----- ----- 0.69 12.10 1.58 28.54 0.98 0.02 ----- ----- 0.94 ----- ----- ----- ----- 0.96 12.15 0.84 28.54 << 1.02 0.02 ----- ----- 0.99 ----- ----- ----- ----- 1.01 << 12.20 0.63 28.54 0.97 0.02 ----- ----- 0.94 ----- ----- ----- ----- 0.96 12.25 0.59 28.53 0.91 0.02 ----- ----- 0.87 ----- ----- ----- ----- 0.89 12.30 0.55 28.52 0.85 0.02 ----- ----- 0.82 ---- ----- ----- ----- 0.84 12.35 0.51 28.51 0.80 0.02 ----- ----- 0.76 ----- ----- ----- ----- 0.78 12.40 0.47 28.50 0.75 0.02 ----- ----- 0.71 ----- ----- ----- ----- 0.73 12.45 0.43 28.49 0.71 0.02 ----- ----- 0.67 ----- ----- ----- ----- 0.69 12.50 0.39 28.49 0.67 0.02 ----- ----- 0.63 ----- ----- ----- ----- 0.65 12.55 0.35 28.48 0.63 0.02 ----- ----- 0.59 ----- ----- ----- ----- 0.61 12.60 0.32 28.47 0.59 0.02 ----- ----- 0.55 ----- ----- ----- ----- 0.57 12.65 0.30 28.47 0.55 0.02 ----- ----- 0.52 ----- ----- ----- ----- 0.54 12.70 0.29 28.46 0.52 0.02 ----- ----- 0.48 ----- ----- ----- ----- 0.50 12.75 0.28 28.45 0.49 0.02 ----- ----- 0.45 ----- ----- ----- ----- 0.47 12.80 0.27 28.45 0.46 0.02 ----- ----- 0.43 ----- ----- ----- ----- 0.45 12.85 0.26 28.44 0.44 0.02 ----- ----- 0.40 ----- ----- ----- ----- 0.42 12.90 0.26 28.44 0.41 0.02 ----- ----- 0.38 ----- ----- . ----- ----- 0.40 12.95 0.25 28.43 0.39 0.02 ----- ----- 0.36 ----- ----- ----- ----- 0.38 13.00 0.24 28.43 0.37 0.02 ----- ----- 0.34 ----- ----- ----- ----- 0.36 13.05 0.23 28.43 0.35 0.02 ----- ----- 0.32 ----- ----- ----- ----- 0.34 13.10 0.22 28.42 0.34 0.02 ----- ----- 0.31 ----- ----- ----- ----- 0.33 13.15 0.21 28.42 0.32 0.02 ----- ----- 0.29 ----- ----- ----- ----- 0.31 13.20 0.21 28.42 0.31 0.02 ----- ----- 0.28 ----- ----- ----- ----- 0.30 13.25 0.20 28.42 0.29 0.02 ----- ----- 0.26 ----- ----- ----- ----- 0.29 13.30 0.20 28.41 0.28 0.02 ----- ----- 0.25 ----- ----- ----- ----- 0.27 13.35 0.19 28.41 0.27 0.02 ----- ----- 0.24 ----- ----- ----- ----- 0.26 13.40 0.19 28A1 0.26 0.02 ----- ----- 0.23 ----- ----- ----- ----- 0.25 13.45 0.18 28.41 0.25 0.02 ----- ----- 0.22 ----- ----- ----- ----- 0.24 13.50 0.18 28.41 0.24 0.02 ----- ----- 0.21 ----- ----- ----- ----- 0.24 13.55 0.17 28.40 0.24 0.02 ----- ----- 0.21 ----- ----- ----- ----- 0.23 13.60 0.17 28.40 0.23 0.02 ----- ----- 0.20 ----- ----- ----- ----- 0.22 13.65 0.17 28.40 0.22 0.02 ----- ----- 0.19 ----- ----- ----- ----- 0.21 13.70 0.16 28.40 0.21 0.02 ----- ----- 0.18 ----- ----- ----- ----- 0.21 13.75 0.16 28,40 0.21 0.02 ----- ----- 0.18 ----- ----- ----- ----- 0.20 13.80 0.15 28.40 0.21 0.02 ----- ----- 0.18 ----- ----- ----- ----- 0.20 13.85 0.15 28.40 0.20 0.02 ----- ----- 0.18 ----- ----- ----- ----- 0.20 Continues on next page... 5 Wetland Routing Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D Exfil Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 13.90 0.15 28.39 0.20 0.02 ----- ----- 0.17 ----- ----- ----- ----- 0.20 13.95 0.14 28.39 0.20 0.02 ----- ----- 0.17 ----- ----- ----- ----- 0.19 14.00 0.14 28.39 0.20 0.02 ----- ----- 0.17 ----- ----- ----- ----- 0.19 14.05 0.14 28.39 0.19 0.02 ----- ----- 0.17 ----- ----- ----- ----- 0.19 14.10 0.13 28.39 0.19 0.02 ----- ----- 0.16 ----- ----- ----- ----- 0.19 14.15 0.13 28.39 0.19 0.02 ----- ----- 0.16 ----- ----- ----- ----- 0.18 14.20 0.13 28.39 0.19 0.02 ----- ----- 0.16 ----- ----- ----- ----- 0.18 14.25 0.13 28.38 0.18 0.02 ----- ----- 0.16 ----- ----- ----- ----- 0.18 14.30 0.13 28.38 0.18 0.02 ----- ----- 0.15 ----- ----- ----- ----- 0.18 14.35 0.13 28.38 0.18 0.02 ----- ----- 0.15 ----- ----- ----- ----- 0.17 14.40 0.13 28.38 0.18 0.02 ----- ----- 0.15 ----- ----- ----- ----- 0.17 14.45 0.12 28.38 0.17 0.02 ----- ----- 0.15 ----- ----- ----- ----- 0.17 14.50 0.12 28.38 0.17 0.02 ----- ----- 0.14 ----- ----- ----- ----- 0.17 14.55 0.12 28.38 0.17 0.02 ----- ----- 0.14 ----- ----- ----- ----- 0.16 14.60 0.12 28.38 0.17 0.02 ----- ----- 0.14 ----- ----- ----- ----- 0.16 14.65 0.12 28.37 0.16 0.02 ----- ----- 0.14 ----- ----- ----- ----- 0.16 14.70 0.12 28.37 0.16 0.02 ----- ----- 0.14 ----- ----- ----- ----- 0.16 14.75 0.12 28.37 0.16 0.02 ----- ----- 0.13 ----- ----- ----- ----- 0.16 14.80 0.12 28.37 0.16 0.02 ----- ----- 0.13 ----- ----- ----- ----- 0.15 14.85 0.11 28.37 0.16 0.02 ----- ----- 0.13 ----- ----- ----- ----- 0.15 14.90 0.11 28.37 0.15 0.02 ----- ----- 0.13 ----- ----- ----- ----- 0.15 14.95 0.11 28.37 0.15 0.02 ----- ----- 0.13 ----- ----- ----- ----- 0.15 15.00 0.11 28.37 0.15 0.02 ----- ----- 0.12 ----- ----- ----- ----- 0.15 15.05 0.11 28.37 0.15 0.02 ----- ----- 0.12 ----- ----- ----- ----- 0.14 15.10 0.11 28.37 0.15 0.02 ----- ----- 0.12 ----- ----- ----- ----- 0.14 15.15 0.11 28.36 0.14 0.02 ----- ----- 0.12 ----- ----- ----- ----- 0.14 15.20 0.11 28.36 0.14 0.02 ----- ----- 0.12 ----- ----- ----- ----- 0.14 15.25 0.10 28.36 0.14 0.02 ----- ----- 0.11 ----- ----- ----- ----- 0.14. 15.30 0.10 28.36 0.14 0.02 ----- ----- 0.11 ----- ----- ----- ----- 0.14 15.35 0.10 28.36 0.14 0.02 ----- ----- 0.11 ----- ----- ----- ----- 0.13 15.40 0.10 28.36 0.14 0.02 ----- ----- 0.11 ----- ----- ----- ----- 0.13 15.45 0.10 28.36 0.13 0.02 ----- ----- 0.11 ----- ----- ----- ----- 0.13 15.50 0.10 28.36 0.13 0.02 ----- ----- 0.11 ----- ----- ----- ----- 0.13 15.55 0.10 28.36 0.13 0.02 ----- ----- 0.11 ----- ----- ----- ----- 0.13 15.60 0.10 28.36 0.13 0.02 ----- ----- 0.10 ----- ----- ----- ----- 0.13 15.65 0.09 28.36 0.13 0.02 ----- ----- 0.10 ----- ----- ----- ----- 0.12 15.70 0.09 28.35 0.13 0.02 ----- ----- 0.10 ----- ----- ----- ----- 0.12 15.75 0.09 28.35 0.12 0.02 ----- ----- 0.10 ----- ----- ----- ----- 0.12 15.80 0.09 28.35 0.12 0.02 ----- ----- 0.10 ----- ----- ----- ----- 0.12 15.85 0.09 28.35 0.12 0.02 ----- ----- 0.10 ----- ----- ----- ----- 0.12 15.90 0.09 28.35 0.12 0.02 ----- ----- 0.09 ----- ----- ----- ----- 0.12 15.95 0.09 28.35 0.12 0.02 ----- ----- 0.09 ----- ----- ----- ----- 0.12 16.00 0.09 28.35 0.12 0.02 ----- ----- 0.09 ----- ----- ----- ----- 0.11 16.05 0.08 28.35 0.12 0.02 ----- ----- 0.09 ----- ----- ----- ----- 0.11 16.10 0.08 28.35 0.11 0.02 ----- ----- 0.09 ----- ----- ----- ----- 0.11 16.15 0.08 28.35 0.11 0.02 ----- ----- 0.09 ----- ----- ----- ----- 0.11 16.20 0.08 28.35 0.11 0.02 ----- ----- 0.09 ----- ----- ----- ----- 0.11 16.25 0.08 28.35 0.11 0.02 ----- ----- 0.08 ----- ----- ----- ----- -0.11 16.30 0.08 28.35 0.11 0.02 ----- ----- 0.08 ----- ----- ----- ----- 0.11 16.35 0.08 28.34 0.11 0.02 ----- ----- 0.08 ----- ----- ----- ----- 0.10 16.40 0.08 28.34 0.11 0.02 ----- ----- 0.08 ----- ----- ----- ----- 0.10 Continues on next page... A Wetland Routing Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D Exfil Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 16.45 0.08 28.34 0,10 0.02 ----- ----- 0.08 ----- ----- ----- ----- 0.10 ... End Pond Report 7 Hydraflow Hydrographs by Intelisolve Wednesday, Jul 27 2011, 6:11 AM Pond No. 1 - Wetlands Pond Data Pond storage is based on known contour areas. Average end area method used. Stage I Storage Table Stage (ft) Elevation (ft) Contour area (sgft) Incr. Storage (cuft) Total storage (cuft) 0.00 27.50 5,062 0 0 0.50 28.00 5,655 2,679 2,679 1.50 29.00 6,883 6,269 8,948 2.50 30.00 8,167 7,525 16,473 Culvert I Orifice Structures Weir Structures [A] [B] [C] [D] [A] [B] [C] [D] Rise (in) = 15.00 1.00 0.00 0.00 Crest Len (ft) = 3.00 4.00 0.00 0.00 Span (in) = 15.00 1.00 0.00 0.00 Crest El. (ft) = 28.33 28.90 0.00 0.00 No. Barrels = 1 1 0 0 Weir Coeff. = 3.30 3.30 0.00 0.00 Invert El. (ft) = 27.50 27.50 0.00 0.00 Weir Type = Broad Broad -- --- Length (ft) = 215.00 1.00 0.00 0.00 Multi -Stage = Yes Yes No No Slope (%) = 0.50 0.50 0.00 0.00 N-Value = .010 .013 .000 .000 Orif. Coeff. = 0.60 0.60 0.00 0.00 Multi -Stage = n/a Yes No No Exfiltration = 0.000 inlhr (Contour) Tailwater Elev. = 0.00 ft Note. Culveworitice outllows have been analyzed under inlet and outlet control. Weir riser checked for orifice wnditions. Stage I Storage I Discharge Table Stage Storage Elevation Civ A Clv B Clv C Clv D Wr A Wr B Wr C Wr D Exfil Total ft cuft ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 0.00 0 27.50 0.00 0.00 --- --- 0.00 0.00 --- --- --- 0.00 0.05 268 27.55 0.00 0.00 --- --- 0.00 0.00 --- --- --- 0.00 0.10 536 27.60 0.01 0.01 -- --- 0.00 0.00 - --- -- 0.01 0.15 804 27.65 0.01 0.01 -- --- 0.00 0.00 --- --- --- 0.01 0.20 1,072 27.70 0.01 0.01 -- --- 0.00 0.00 --- --- --- 0.01 0.25 1,340 27.75 0.01 0.01 --- --- 0.00 0.00 --- --- --- 0.01 0.30 1,608 27.80 0.01 0.01 -- --- 0.00 0.00 --- --- --- 0.01 0.35 1,875 27.85 0.01 0.01 --- --- 0.00 0.00 --- -- --- 0.01 0.40 2,143 27.90 0.02 0.02 --- --- 0.00 0.00 --- --- --- 0.02 0.45 2,411 27.95 0.02 0.02 --- --- 0.00 0.00 -- --- --- 0.02 0.50 2,679 28.00 0.02 0.02 --- -- 0.00 0.00 -- 0.02 0.60 3,306 28.10 0.02 0.02 --- --- 0.00 0.00 --- --- -- 0.02 0.70 3,933 28.20 0.02 0.02 --- --- 0.00 0.00 --- --- --- 0.02 0.80 4,560 28.30 0.02 0.02 --- --- 0.00 0.00 --- --- --- 0.02 0.90 5,187 28.40 0.21 0.02 -- -- 0.18 0.00 --- --- --- 0.21 1.00 5,814 28.50 0.73 0.02 --- --- 0.69 0.00 --- --- --- 0.71 1.10 6,441 28.60 1.42 0.02 --- --- 1.39 0.00 --- --- --- 1.41 1.20 7,068 28.70 2.26 0.02 --- --- 2.23 0.00 -- --- --- 2.25 1.30 7,694 28.80 3.13 0,02 --- --- 3.10 0.00 -- -- -- 3.12 1.40 8,321 28.90 3.85 0.02 --- --- 3.83 0.00 --- --- --- 3.85 1.50 8,948 29.00 4.65 0.01 --- --- 4.22 0.42 --- --- --- 4.65 1.60 9,701 29.10 5.27 0.01 --- --- 4.13 1.13 --- -- --- 5.27 1.70 10,453 29.20 5.59 0.01 -- -- 3.99 1.59 --- --- --- 5.59 1.80 11,206 29.30 5.84 0.01 --- --- 3.91 1.92 --- --- --- 5.84 1.90 11,958 29.40 6.06 0.01 --- --- 3.86 2.19 --- --- --- 6.06 2.00 12,711 29.50 6.26 0.00 --- -- 3.83 2.42 -- --- --- 6.25 2.10 13,463 29.60 6.44 0.00 --- --- 3.82 2.62 -- -- -- 6.44 2.20 14,216 29.70 6.62 0.00 --- --- 3.82 2.79 --- --- --- 6.62 2.30 14,968 29.80 6.79 0.00 --- --- 3.83 2.95 -- --- --- 6.79 2.40 15,721 29.90 6.95 0.00 --- --- 3.84 3.10 --- -- -- 6.94 2.50 16,473 30.00 7.11 0.00 --- --- 3.87 3.24 --- -- -- 7.11 Hydrograph Summary Report Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to peak (min) Volume (cuft) Inflow hyde) Maximum elevation (ft) Maximum storage (tuft) Hydrograph description 1 SCS Runoff 9.00 3 717 22,552 ---- ------ ------ PostDeveloped 2 Reservoir 5.15 3 723 22,440 1 29.08 9,555 Wetland Routing Post-Developed_24hr_Site2_Rev.gpw Return Period: 10 Year Wednesday, Jul 27 2011, 6:11 AM Hvdraflow Hvdronranhs by Intelisolve Hydrograph Report HydraFlow Hydrographs by Intelisolve Wednesday, Jul 27 2011, 6:11 AM Hyd. No. 1 PostDeveloped Hydrograph type = SCS Runoff Peak discharge = 9.00 cfs Storm frequency = 10 yrs Time interval = 3 min Drainage area = 1.15 ac Curve number = 94 Basin Slope = 0.0 % Hydraulic length = Oft Tc method = USER Time of conc. (Tc) = 5.0 min Total precip. = 6.47 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Hydrograph Discharge Table Time -- Outflow (hrs cfs) 11.60 1.16 11.65 1.74 11.70 2.48 11.75 3.29 11.80 4.24 11.85 5.64 11.90 7.54 11.95 9.00 << 12.00 8.34 12.05 5.70 12.10 3.08 12.15 1.64 12.20 1.22 12.25 1.14 12.30 1.06 12.35 0.98 12.40 0.91 ...End Hydrograph Volume = 22,552 cult ( Printed values= 10%of dp.) 7 Hydrograph Report 10 HydraFlow Hydrographs by Intelisolve Hyd. No. 2 Wetland Routing Hydrograph type = Reservoir Storm frequency = 10 yrs Inflow hyd. No. = 1 Max. Elevation = 29.08 ft Peak discharge Time interval Reservoir name Max. Storage Wednesday, Jul 27 2011, 6:11 AM = 5.15 cfs = 3 min = Wetlands = 9,555 cuft Storage Indication method used. Outflow hydrograph volume = 22,440 cuft Hydrograph Discharge Table ( P^°1ed values, 10% of up) Time Inflow Elevation Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D Exfil Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 11.75 3.29 28.48 0.61 0.02 ----- ----- 0.58 ----- ----- ----- ---- 0.60 11.80 4.24 28.56 1,14 0.02 ----- ----- 1.11 ----- ----- ----- ----- 1.13 11.85 5.64 28.66 1.91 0.02 ----- ----- 1.88 ----- ----- ----- ----- 1.90 11.90 7.54 28.78 2.94 0.02 ----- ----- 2.91 ----- ----- ----- ----- 2.93 11.95 9.00 << 28.92 3.98 0.02 ----- ----- 3.90 0.07 ----- ----- ----- 3.98 12.00 8.34 29.03 4.85 0.01 ----- ----- 4.19 0.65 ----- ----- ----- 4.85 12.05 5.70 29.08 << 5.15 0.01 ----- ----- 4.15 0.99 ----- ----- ----- 5.15 << 12.10 3.08 29.06 5.05 0.01 ----- ----- 4.16 0.87 ----- ----- ----- 5.05 12.15 1.64 29.00 4.67 0.01 ----- ----- 4.22 0.44 ----- ----- ----- 4.67 12.20 1.22 28.92 4.02 0.02 ----- ----- 3.91 0.09 ----- ----- ----- 4.02 12.25 1.14 28.85 3.47 0.02 ----- ----- 3.45 0.00 ----- ----- ----- 3.47 12.30 1.06 28.79 3.01 0.02 ----- ----- 2.98 ----- ----- ----- ----- 3.00 12.35 0.98 28.74 2.57 0.02 ----- ----- 2.54 ----- ----- ----- ----- 2.56 12.40 0.91 28.69 2.22 0.02 ----- ----- 2.18 ----- ----- ----- ----- 2.20 12.45 0.83 28.66 1.93 0.02 ----- ----- 1.90 ----- ----- ----- ----- 1.91 12.50 0.75 28.63 1.68 0.02 ----- ----- 1.65 ----- ----- ----- ----- 1.67 12.55 0.67 28.61 1.47 0.02 -----. ----- 1.45 ----- ----- ----- ----- 1.47 12.60 0.62 28.59 1.32 0.02 ----- ----- 1.29 ----- ----- ----- ----- 1.31 12.65 0.59 28.57 1.19 0.02 ----- ----- 1.16 ----- ----- ----- ----- 1.18 12.70 0.56 28.55 1.08 0.02 ----- ----- 1.05 ----- ----- ----- ----- 1.07 12.75 0.55 28.54 0.99 0.02 ----- ----- 0.96 ----- ----- ----- ----- 0.98 12.80 0.53 28.53 0.91 0.02 ----- ----- 0.88 ----- ----- ----- ----- 0.90 12.85 0.51 28.52 0.85 0.02 ----- ----- 0.81 ----- ----- ----- ----- 0.83 12.90 0.49 28.51 0.79 0.02 ----- ----- 0.75 ----- ----- ----- ----- 0.77 12.95 0.47 28.50 0.74 0.02 ----- ----- 0.70 ----- ----- ----- ----- 0.72 13.00 0.46 28A9 0.70 0.02 ----- ----- 0.66 ----- ----- ----- ----- 0.68 13.05 0.44 28.49 0.67 0.02 ----- ----- 0.63 ----- ----- ----- ----- 0.65 13.10 0.42 28.48 0.64 0.02 ----- ----- 0.60 ----- ----- ----- ----- 0.62 13.15 0.41 28.48 0.61 0.02 ----- ----- 0.57 ----- ----- ----- ----- 0.59 13.20 0.40 28.47 0.58 0.02 ----- ----- 0.55 ----- ----- ----- ----- 0.57 13.25 0.39 28.47 0.56 0.02 ----- ----- 0.52 ----- ----- ----- ----- 0.54 13.30 0.38 28.46 0.54 0.02 ----- ----- 0.50 ----- ----- ----- ----- 0.52 End Pond Report Hydraflow Hydrographs by Intelisolve Wednesday, Jul 27 2011, 6A 1 AM Pond No. 1 - Wetlands Pond Data Pond storage is based on known contour areas. Average end area method used. Stage I Storage Table Stage (ft) Elevation (ft) Contour area (sgft) Irl Storage (tuft) Total storage (tuft) 0.00 27.50 5,062 0 0 0.50 28.00 5,655 2,679 2,679 1.50 29.00 6,883 6,269 8,948 2.50 30.00 8,167 7,525 16,473 Culvert/ Orifice Structures Weir Structures [A] [B] [C] [D] [A] [B] [C] [D] Rise (in) = 15.00 1.00 0.00 0.00 Crest Len (ft) = 3.00 4.00 0.00 0.00 Span (in) = 15.00 1.00 0.00 0.00 Crest El. (ft) = 28.33 28.90 0.00 0.00 No. Barrels = 1 1 0 0 Weir Coeff. = 3.30 3.30 0.00 0.00 Invert El. (ft) = 27.50 27.50 0.00 0.00 Weir Type = Broad Broad --- --- Length (ft) = 215.00 1.00 0.00 0.00 Multistage = Yes Yes No No Slope (%) = 0.50 0.50 0.00 0.00 N-Value = .010 .013 .000 ..000 Orif. Coeff. = 0.60 0.60 0.00 0.00 Multi -Stage = hie Yes No No Exfiltration = 0.000 ini (Contour) Tailwater Elev. = 0.00 it Note'. CulverVOrifice outflows have been analyzed under inlet and outlet control. Weir riser checked for orifice conditions, Stage 1 Storage I Discharge Table Stage Storage Elevation CIv A Clv B Clv C CIv D Wr A Wr B Wr C Wr D Exfil Total It tuft ft cfs cfs cis cis cis cis cfs cis cis cis 0.00 0 27.50 0.00 0.00 -- --- 0.00 0.00 -- --- --- 0.00 0.05 268 27.55 0.00 0.00 --- --- 0.00 0.00 --- --- --- 0.00 0.10 536 27.60 0.01 0.01 --- --- 0.00 0.00 --- --- --- 0.01 0.15 804 27.65 0.01 0.01 -- --- 0.00 0.00 --- --- - 0.01 0.20 1,072 27.70 0.01 0.01 --- --- 0.00 0.00 --- --- -- 0.01 0.25 1,340 27.75 0.01 0.01 --- --- 0.00 0.00 --- --- --- 0.01 0.30 1,608 27.80- 0.01 0.01 --- --- 0.00 0.00 --- --- -- 0.01 0.35 1,875 27.85 0.01 0.01 --- --- 0.00 0.00 --- --- - 0.01 0.40 2,143 27.90 0.02 0.02 -- --- 0.00 0.00 --- --- --- 0.02 0.45 2,411 27.95 0.02 0.02 --- --- 0.00 0.00 --- --- --- 0.02 0.50 2,679 28.00 0.02 0.02 --- --- 0.00 0.00 --- -- --- 0.02 0.60 3,306 28.10 0.02 0.02 --- --- 0.00 0.00 -- -- --- 0.02 0.70 3,933 28.20 0.02 0.02 --- -- 0.00 0.00 -- --- --- 0.02 0.80 4,560 28.30 0.02 0.02 --- --- 0.00 0.00 --- --- --- 0.02 0.90 5,187 28.40 0.21 0.02 --- --- 0.18 0.00 --- --- --- 0.21 1.00 5,814 28.50 0.73 0.02 --- --- 0.69 0.00 -- --- -- 0.71 1.10 6,441 28.60 1.42 0.02 --- -- 1.39 0.00 --- -- -- 1.41 1.20 7,068 28.70 2.26 0.02 -- --- 2.23 0.00 --- --- --- 2.25 1.30 7,694 28.80 3.13 0.02 --- --- 3.10 0.00 --- --- --- 3.12 1.40 8,321 28.90 3.85 0.02 --- --- 3.83 0.00 -- --- --- 3.85 1.50 8,948 29.00 4.65 0.01 --- --- 4.22 0.42 --- --- -- 4.65 1.60 9,701 29.10 5.27 0.01 --- --- 4.13 1.13 --- --- -- 5.27 1.70 10,453 29.20 5.59 0.01 --- --- 3.99 1.59 --- -- -- 5.59 1.80 11,206 29.30 5.84 0.01 -- --- 3.91 1.92 -- --- --- 5.84 1.90 11,958 29.40 6.06 0.01 --- --- 3S6 2.19 --- -- --- 6.06 2.00 12,711 29.50 6.26 0.00 --- --- 3.83 2.42 --- --- --- 6.25 2.10 13,463 29.60 6.44 0.00 --- --- 3.82 2.62 --- --- --- 6.44 2.20 14,216 29.70 6.62 0.00 -- --- 3.82 2.79 -- --- -- 6.62 2.30 14,968 29.80 6.79 0.00 --- --- 3.83 2.95 --- --- --- 6.79 2.40 15,721 29.90 6.95 0,00 --- --- 3.84 3.10 --- --- --- 6.94 2.50 16,473 30.00 7.11 0,00 --- --- 3.87 3.24 --- --- -- 7.11 Exhibit "C" Post -Developed Condition Not Draining to Wetland Hydrograph Return Period Recap Hyd. No. Hydrograph type (origin) Inflow Hyd(s) Peak Outflow (cfs) Hydrograph description 1-Yr 2-Yr 3-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr 1 SCS Runoff ---- -- 0.77 ------- -------- ------- 1.96 ------ ------- ----- Postdeveloped Proj. file: Post-Developed_24hr_Site2_nonwetland_Rev.gpw Wednesday, Jul 27 2011, 6:16 AM Hydraflow Hydrographs by Intelisolve Hydrograph Summary Report Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to peak (min) Volume (cuft) Inflow hyd(s) Maximum elevation (ft) Maximum storage (cuft) Hydrograph description 1 SCS Runoff 0.77 1 716 1,359 ---- ------ ------ Postdeveloped Post-Developed_24hr_Site2_nonwet aftl&tevRjpied: 1 Year Wednesday, Jul 27 2011, 6:16 AM Hvdraflow Hydroqraphs by Intelisolve Hydrograph Report Hydraflow Hydrographs by Intelisolve Hyd. No. 1 Postdeveloped Wednesday, Jul 27 2011, 6:16 AM Hydrograph type = SCS Runoff Peak discharge = 0.77 cfs Storm frequency = 1 yrs Time interval = 1 min Drainage area = 0.25 ac Curve number = 80 Basin Slope = 0.0 % Hydraulic length = Oft Tc method = USER Time of conc. (Tc) = 3.0 min Total precip. = 3.45 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Hydrograph Discharge Table Time -- Outflow Time -- Outflow (hrs cfs) (hrs cfs) 11.62 0.09 12.18 0.09 11.63 0.10 12.20 0.09 11.65 0.11 12.22 0.09 11.67 0.13 12.23 0.09 11.68 0.14 12.25 0.08 11.70 0.16 12.27 0.08 11.72 0.18 12.28 0.08 11.73 0.20 12.30 0.08 11.75 0.22 11.77 0.24 11.78 0.27 ...End 11.80 0.31 11.82 0.37 11.83 0.42 11.85 0.49 11.87 0.55 11.88 0.62 11.90 0.69 11.92 0.77 11.93 0.77 << 11.95 0.69 11.97 0.58 11.98 0.46 12.00 0.35 12.02 0.23 12.03 0.15 12.05 0.12 12.07 0.10 12.08 0.10 12.10 0.10 12.12 0.10 12.13 0.10 12.15 0.10 12.17 0.09 Hydrograph Volume = 1,359 cuft ( Prow values >= 10% or pp.) 3 4 Hydrograph Summary Report Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to peak (min) Volume (cuft) Inflow hyd(s) Maximum elevation (ft) Maximum storage (cuft) Hydrograph description 1 SCS Runoff 1.96 1 715 3,580 ---- ------ ------ Postdeveloped Post-Developed_24hr_Site2_nonwet afttft d: 10 Year Wednesday, Jul 27 2011, 6:16 AM Hvdraflow Hvdrooraohs by Intelisolve 62 Hydrograph Report Hydraflow Hydrographs by Intelisolve Hyd. No. 1 Postdeveloped Hydrograph type Storm frequency Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 10 yrs = 0.25 ac = 0.0 % = USER = 6.47 in = 24 hrs Hydrograph Discharge Table Time -- Outflow Time -- Outflow (hrs cfs) (hrs cfs) 11.58 0.22 12.15 0.23 11.60 0.26 12.17 0.22 11.62 0.30 12.18 0.22 11.63 0.34 12.20 0.21 11.65 0.38 12.22 0.21 11.67 0.42 12.23 0.20 11.68 0.47 12.25 0.20 11.70 0.51 11.72 0.56 11.73 0.61 ...End 11.75 0.66 11.77 0.72 11.78 0.80 11.80 0.91 11.82 1.04 11.83 1.18 11.85 1.33 11.87 1.48 11.88 1.64 11.90 1.79 11.92 1.96 << 11.93 1.94 11.95 1.70 11.97 1.43 11.98 1.12 12.00 0.84 12.02 0.56 12.03 0.37 12.05 0.28 12.07 0.25 12.08 0.24 12.10 0.24 12.12 0.23 12.13 0.23 Wednesday, Jul 27 2011, 6:16 AM Peak discharge = 1.96 cfs Time interval = 1 min Curve number = 80 Hydraulic length = Oft Time of conc. (Tc) = 3.0 min Distribution = Type II Shape factor = 484 Hydrograph Volume = 3,580 cult ( Printed values>= 10%of QP.) Trapezoidal Channel Analysis & Design Open Channel - Uniform flow Worksheet Name: Wendy's Havelock Comment: Grass Swale Solve For Depth Given Input Data: Bottom Width..... 4.00 ft Left Side Slope.. 5.00:1 (H:V) Right. Side Slope. 5.00:1 (H:V) Manning's n...... 0.060 Channel Slope.... 0.0030 ft/ft Discharge........ 8.42 cfs Computed Results: Depth............ velocity......... Flow Area........ Flow Top Width... Wetted Perimeter. Critical Depth... Critical Slope... Froude Number.... 0.97 ft v- 4 0.98 fps 8.56 sf 13.68 ft 13.88 ft 0.43 ft 0.0780 ft/ft 0.22 (flow is Subcritical) Open Channel Flow Module, Version 3.43 (c:) 1991 Haestad Methods, Inc. * 37 Brookside Rd * Waterbury, Ct 06708 Hydrograph Return Period Recap Hyd. No. Hydrograph type (origin) Inflow Hyd(s) Peak Outflow (cfs) Hydrograph description 1-Yr 2-Yr D-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr 1 SCS Runoff ------ 4.27 ------ ------- ------- 8. 22 ------ ------- ------ Postdeveloped Proj. file: Post-Developed_24hr Site2_Swale.gpw Wednesday, Jul 27 2011, 6:17 AM Hydraflow Hydrographs by Intelisolve Hydrograph Summary Report Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to peak (min) Volume (cuft) Inflow hyd(s) Maximum elevation (ft) Maximum storage (cuft) Hydrograph description 1 SCS Runoff 4.27 1 717 9,389 --- ------ ------ Postdeveloped Post-Developed_24hr Site2_Swale. pReturn Period: 1 Year Wednesday, Jul 27 2011, 6:17 AM Hydraflow Hydrographs by Intelisolve Hydrograph Report HydraFlow Hydrographs by Intelisolve Hyd. No. 1 Postdeveloped Hydrograph type Storm frequency Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 1 yrs 0.90 ac = 0.0 % = USER 3.45 in = 24 hrs Hydrograph Discharge Table Time -- Outflow Time -- Outflow (hrs cfs) (hrs cfs) 11.58 0.44 12.15 0.57 11.60 0.51 12.17 0.55 11.62 0.60 12.18 0.54 11.63 0.70 12.20 0.53 11.65 0.80 12.22 0.52 11.67 0.91 12.23 0.51 11.68 1.02 12.25 0.50 11.70 1.13 12.27 0.48 11.72 1.25 12.28 0.47 11.73 1.36 12.30 0.46 11.75 1.48 12.32 0.45 11.77 1.60 12.33 0.44 11.78 1.74 11.80 1.90 11.82 2.10 ...End 11.83 2.34 11.85 2.60 11.87 2.90 11.88 3.21 11.90 3.54 11.92 3.89 11.93 4.14 11.95 4.27 << 11.97 4.22 11.98 3.96 12.00 3.57 12.02 3.06 12.03 2.51 12.05 1.96 12.07 1.49 12.08 1.13 12.10 0.89 12.12 0.73 12.13 0.63 Wednesday, Jul 27 2011, 6:17 AM Peak discharge = 4.27 cfs Time interval = 1 min Curve number = 94 Hydraulic length = Oft Time of conc. (Tc) = 5.0 min Distribution = Type II Shape factor = 484 Hydrograph Volume = 9,389 cult ( Printed values >= 10%of 0p.) KI 4 Hydrograph Summary Report Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to peak (min) Volume (cuft) Inflow hyd(s) Maximum elevation (ft) Maximum storage (tuft) Hydrograph description 1 SCS Runoff 8.42 1 717 19,414 ---- ----- ------ Postdeveloped Post-Developed_24hr_Site2_Swale. pRieturn Period: 10 Year Wednesday, Jul 27 2011, 6:17 AM Hvdraflnw Hvdrnnranhs by Intelisnlve 5 Hydrograph Report Hydraflow Hydrographs by Intelisolve Hyd. No. 1 Postdeveloped Wednesday, Jul 27 2011, 6:17 AM Hydrograph type = SCS Runoff Peak discharge = 8.42 cfs Storm frequency = 10 yrs Time interval = 1 min Drainage area = 0.90 ac Curve number = 94 Basin Slope = 0.0 % Hydraulic length = Oft Tc method = USER Time of conc. (Tc) = 5.0 min Total precip. = 6.47 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Hydrograph Discharge Table Time -- Outflow Time -- Outflow (hrs cfs) (hrs cfs) 11.58 0.94 12.15 1.12 11.60 1.09 12.17 1.07 11.62 1.27 12.18 1.05 11.63 1.47 12.20 1.03 11.65 1.68 12.22 1.00 11.67 1.91 12.23 0.98 11.68 2.14 12.25 0.96 11.70 2.37 12.27 0.94 11.72 2.60 12.28 0.91 11.73 2.83 12.30 0.89 11.75 3.06 12.32 0.87 11.77 3.30 12.33 0.85 11.78 3.57 11.80 3.89 11.82 4.27 ...End 11.83 4.73 11.85 5.25 11.87 5.82 11.88 6.43 11.90 7.07 11.92 7.72 11.93 8.20 11.95 8.42 << 11.97 8.32 11.98 7.77 12.00 6.99 12.02 5.99 12.03 4.90 12.05 3.83 12.07 2.91 12.08 2.21 12.10 1.74 12.12 1.41 12.13 1.22 Hydrograph Volume = 19,414 cult ( Printed values = 10%of on) Precipitation Frequency Data Server S" Page 1 of 4 POINT PRECIPITATION,, (b FREQUENCY ESTIMATES F FROM NOAA ATLAS 14 'a. ,,..r North Carolina 35.010 N 77.279 W 9 feet from "Precipitation -Frequency Atlas ofthe United States' NOAA Atlas 14, Volume 2, Version 3 G.M. Bormin, D. Martin, B. Lin, T. Parzybok, M.Yekta, and D. Riley NOAA, National Weather Service, Silver Spring, Maryland, 2004 Extracted: To Jul 22 2011 Confidence Limits SeasonaGIS data Maps Docs Return to State Map Prect Ration Frequency Estimates (inches ARI (years) 5 min 10 min IS min 30 min 60 mm 120 min 3 hr 6 hr 12 hr 24 hr 48 hr 4 day 7 day 10 d� 20 d� 30 d� 45 dii� 60 d� I� 0.48 0.76 0.95 1.30 1.63 1.95 2.10 2.54 2.99 3.45 4.00 4.52 5.28 5.99 8.06 9.95 12.41 14.92 �2 0.56 O. 99 1.12 I.55 1.94 2.35 2.53 3.06 3.61 4.19 4.85 5.47 6.37 7.17 9.61 11.82 14.6R 17.62 0.64 1.03 1.30 1.85 2.37 2.93 3.17 3.83 4.54 5.42 6:23 6.95 8.00 8.89 11.69 14.22 17.52 20.78 10 0.72 1.16 L47 2.12 2.77 3.49 3.8I 4.62 5.50 6.47 7.41 8.19 9.35 10.31 13.40 16.15 19.R(> 23.30 25 0.82 1.30 1.65 2.45 3.26 4.23 4.67 5.67 6.80 8.03 9.20 9.99 11.30 12.35 15.82 I8.80 23.13 26.75 50 0.90 L43 1.80 2.72 3.68 4.R9 5.46 6.65 8.03 9.37 10.76 1152 12.93 14.05 17.82 20.91 25.77 29.46 100 0.97 L54 1.95 2.98 4.11 5.57 6.29 7.70 9.35 10.86 12.50 13.20 14.69 15.86 19.91 23.08 28.53 32.20 200 1.04 L65 2.08 3.25 4.55 6.32 7.21 8.R6 10.83 12.52 14.46 15.02 I6.58 17.81 22.12 25.32 31.39 34.99 SOO 113 1.79 2.26 3.59 5.16 Z36 8.54 10.54 13.00 15.01 17.41 17.87 19.32 20.61 25.24 28.39 35.37 38.74 1000 1:22 1.92 2.41 3.90 5.69 R.30 9.77 I2.10 15.04 17.15 19.96 20.33 21.62 22.91 27.77 30.80 38.54 41.64 These precipitation frequency, estimates are based on a penial duration series. ARI is the Average Recurrence Interval. Please refer to NOAA Atlas 14 Document for more information. NOTE: Formatting forces estimates near zero to appear as zero. * Upper bound of the 90% confidence interval Precipitation Frequency Estimates (inches) ARI** 5 10 IS 30 60 120 3 6 12 24 48 4 7 10 20 30 45 60 (years) min min min min min min hr hr hr hr hr day day I day 11 day day 11 day 11 day =I 0.52 0.83 1.04 1.42 1.77 2,15 2.34 2.84 3.37 3.83 4.45 4.96 5.78 6.55 8.73 10.1 13.34 15.94 0.61 0.97 1.22 1.69 2.12 2.58 2.81 3.42 4.05 4.66 5.3 66.00 6.97 7.85 10.41 12.73 15.78 88.82 0 0.70 I.1 I 1.41 2.00 2.57 3.21 3.51 4.28 5.10 6.01 6.93 7.63 8.76 9.71 12. 77 H3fl 18.83 22.18 10 0.79 L26 L59 2.31 3.00 3.83 4,21 5.15 6.18 7.15 R.23 8.98 10.24 11.26 1451 17.37 21.34 24.86 25 0.89 1.41 1.79 2.65 3.53 4.62 5.14 6.31 7.62 8.85 10.19 10.95 12.36 13.48 17.13 20.22 24.87 28.53 50 0.97 EE L96 Efl 3. 99 5.35 6.01 EE 8.96 10.33 11.92 12.63 14.16 15.36 19.30 22.52 27.75 31.44 100 I.OS 1.67 2.11 3.23 4.45 6.09 6.92 8.54 00.43 11.98 13.87 14.48 16.10 17.37 21.62 24.92 30.76 34.45 200 1.13 1.79 2.26 3.52 4.94 6.90 7.93 9.81 12.07 13.81 I6.07 16.52 18.22 19.56 24,09 27.41 33.92 37.54 500 1.23 1.95 2.46 3.91 5.61 8. 55 9.41 11.68 14. 99 66. 11 99.45 19.76 2136 22.76 27.63 30.86 38.40 41.78 1000 1.33 2.09 2.62 4.25 6.21 9.11 10.79 13.44 16.77 19.05 22.44 22.63 24.04 25.44 30.57 33.62 42.07 45.11 ' The upper bound of the confldenca interval at 90% confidence level is the value which 5%of the simulated ouantile values for a oiven frequency are areater than. - These preciptation frequency estimates are based on a partial duration series. ARI is the Average Recurrence Interval. Please refer to NOAA Atlas 14 Document for more information. NOTE: Formatlinq prevents estimates near zero to aooear as zero * Lower bound of the 90% confidence interval Precipitation Frequency Estimates (inches) ARI** 5 10 IS 30 60 120 3 6 12 24 48 4 7 10 20 30 45 60 it (years) min min min min min min hr hr hr hr day day day day day day day © 0.44 0.70 0.8R 1.20 ISO 1.78 1.92 2.31 2.70 3.13 3.63 4.13 4.R5 5.50 7.47 9.29 11.62 14.01 �0.51 0.82 1.03 1.43 1.79 2.15 2.31 2.78 3.25 3.R1 4.39 5.00 5.84 6.60 8.91 11,074 13.75 16.54 0.5I 0.94 1.20 1.70 2.18 2.67 2.88 3.47 4.08 4.92 5.62 6.34 7.32 8.16 10.81 13.27 16.38 19.49 10 0.67 1.06 1.35 1.95 2.54 3.I8 3.46 4.17 4.92 5.84 6.66 245 8.53 9.43 12.36 15.03 18.52 21.81 25 0.75 Lr�9 I.I.^I 2.23 2.97 3.83 4.21 5.09 6A4 7.19 8.2I 9.03 IOr�25 11�24 14r�52 17�44 21�48 24��95 httn- //hd ac. nws. nna a.env/ce i-bin/h dsc/bui l dout. nerl?tvoe=nf&units=us&series=nd&statena... 7/22/201 1 Precipitation Frequency Data Server t-, Q Page I of 3 POINT PRECIPITATION FREQUENCY ESTIMATES s j FROM NOAA ATLAS 14 North Carolina 35.026 N 77.295 W 22 feet from "Precipitation -Frequency Atlas of the United States' NOAA Atlas 14, Volume 2, Verson 3 G.M. Bonnio, D. Martin, B. Lin, T. Parzybok, M.Yekm, and D. Riley NOAA, National Weather Service, Silver Spring, Maryland, 2004 Extracted: Fri Jul 22 2011 Confidence Limits Seasonality Related Info GIS data Maps Dors Return to State Map eci itation Intensity Estimates m r ARI* (years) 5 min 10 10 ����� IS m5 30 mm 60 6 I20 I2 3 hr 6 hr 12 hr 11 24 hr !Lr 48 hr 4 d� 7 Z 10 d� 20 L0 ❑❑ 30 45 d� 60 da - �1 5.70 4.55 3.R0 2.60 1.62 0.97 0.70 0.42 0.25 0.14 O.OR 0.05 0.03 0.02 0.02 0.01 0.01 0.01 0 6.67 5.34 4.47 3.09 1.94 1.17 O.R4 0.51 0.30 0.17 0.10 0.06 0.04 0.03 0.02 0.02 0.01 0.01 O 7.66 6.14 5.17 3.68 2.36 1.46 1.05 0.64 0.E7 0.22 0.13 0.07 0.05 0.04 0.02 0.02 0.02 0.01 10 8.66 67937 5.84 4,23 2.7E 1,74 1.26 0.77 0.45 0.27 0.15 0.08 0.06 0.04 0.03 0.02 0.02 0.02 25 9.77 7.79 6.58 4.87 3.25 2.10 1.55 0.94 0.56 073E 0.19 0.10 0.07 0.05 0.03 0.03 0.02 0.02 50 10.70 8.52 7.19 5.42 3.67 2.4E 1.81 1.10 0.66 0.39 0.22 (1.12 0.08 0.06 0.04 0.03 0.02 0.02 100 F 1-5 81 9.20 7Ej 5.94 4.09 2.77 2.08 1.28 0.77 0.45 0.26 FO 141 0.09 0.07 0.04 0.0E 0.03 0.02 200 22.46 9.88 831 6.47 4,5E 3.14 273E L47 0.8E 0.52 0.3 O0.16 0.10 0.07 0.05 0.0E 070E 0.02 50 133.56 10.72 9.00 7.16 571E 3.66 2,8E 1,75 1.07 0.62 0.36 0.18 0.11 0.09 0.05 0.04 0.03 0.03 1000 14.56 I L46 975E 7.77 5.67 471E 372E 2.01 I.24 0.71 0.41 0.21 071E 070E 0.06 0.04 0.04 070E ' These precipitation frequency estimates are based on a partial duration series. ARI is the Average Recurrence Interval. Please refer to NOAA Atlas 14 Document for more information. NOTE: Formatting forces estimates near zero to appear as zero. * Upper bound of the 90% confidence interval Precipitation Intensity Estimates (in/hr) ARI** 5 10 15 30 60 120 3 6 12 24 48 4 7 10 20 30 45 60 (years) min min min min min min hr It hr hr hr day day day day ILday day I day = 6.22 4.97 4.14 2.84 1.77 107 0.77 0.47 0.28 0.16 0.09 0.05 0.03 0.03 0.02 0.01 0.01 0.01 = 772 67 5.80 4.86 3.36 2.11 L 079E 0.57 0.33 071E 0.11 0.06 0.04 070E 0.02 0.02 0.01 0.01 8.72 6.67 5.62 379E 2.56 1.60 1.16 0.71 0.42 0.25 0.14 0.0R 0.05 4 0.0E 0.02 0.02 0.02 1 07 9.41 Z52 6.34 4.60 2.99 1.90 1.40 0.86 0.51 0.30 0.17 FO 0-91 0.06 0.05 070E 0.02 0.02 0.02 25 10.G0 8.45 7.14 572E 3.52 2.30 1.70 1.05 0.63 0.37 0.21 0.11 0.07 0.06 0.04 0.03 0.02 0.02 7507 11.60 9.24 7.80 5.87 3.98 2.66 1.99 172E 0.74 074E 0.2E 0.13 0.0 00.06 0.04 0.03 0.03 0.02 100 12.56 9.98 R.41 6.44 4.44 370E 272E 1.42 0.86 0.50 072E 0.15 0.10 0.07 0.04 070E 0.03 0.02 2-0 07 13.52 10.72 9.02 7.02 4.92 3 43 276E 176E 0.99 0.57 073E 0.17 ED 0.08 0.05 0.04 0.03 O 03 F5-0i 11.66 9.79 777E 575E 4.00 3.12 1.94 171E 0.69 0.40 0.20 0.13 0.09 0.06 0.04 0.04 0.0E 1000 I5.88 12.50 10.46 8.47 6.18 475E 3.57 272E 1.38 077E 0.46 0.23. 0.14 O.II 0.06 0.05 0.04 070E The upper bound of the conedence interval at 90% confidence level is the value which 5%of the simulated quantile values for a given frequency are greeter than. "These precipitation frequency estimates are based on a radial duration series. ARI is the Average Recurrence Interval. Please refer to NOAA Atlas 14 Document for more information. NOTE. Formatting Prevents estimates near zero to ai as zero. * Lower bound of the 90% confidence interval Precipitation Intensity Estimates (in/hr) ARI** 5 10 IS 30 60 120 3 6 12 24 48 4 7 10 20 30 45 60 (years) min min min min min min hr It hr hr hr day day day 11 day 11 day 11 day 11 day �1 5.24 471E 374E 273E 174E 078E 0.64 0.38 0.22 071E 0.08 0.04 070E 0.02 0.02 0.01 0.01 0.01 �2 6.14 4.91 4.12 2.R5 1.78 1.07 0.77 0.46 O.P7 07167 070 97 0.05 070E 0.03 0.02 0.02 1 0.01 0.01 7.04 5. 44 4.76 3.38 2.17 173E 0.95 EE 0.34 0.20 0.12 0.07 0.04 FO 0-31 0.02 0.02 0.02 0.01 10 Z96 6.36 5.3E E E 2.5E L58 E E 076 97 0.41 0.24 0.14 0.08 0.05 0.04 070E 0.02 0.02 0.02 25 8.92 7.10 6.00 4.45 ED 1,90 L39 0.84 0.50 E0j EE 070E ED 0.05 9fl 0.02 0.02 0.02 httn•//hAcr nwv: nnaa onv/r.ai_hin/h rlcr/hnilr9nnt narl9ivne=iA&Qr.Units=nsRrseries=nriXcstaten... 7/22/2011 NEUSE RIVER BASIN Name of Stream Subbasin Stream Index Number Map Number Class Slocum Creek NEU10 27-112 H31NW9 SC;Sw,NSW Smith Creek NEUO1 -12-2-(1) C24SE1 C; NSW Smith Creek NEU01 27-12-2-(2) C24SEI WS-IV;NSW Smith Creek NEU01 27-12-2-(3) C24SW6 WS-IV;NSW,CA Smith Creek NEU02 27-23-(1) D25NW1 WS-II;HQW,NSW Smith Creek NEU02 27-23-(2) D25NW1 C;NSW Smith Creek NEU10 27-129-7-(1) G32SW4 SC;HQW,NSW Smith Creek NEU10 27-129-7-(2) G32SW8 SC;NSW Smith Creek NEU13 27-150-14 G32NW5 SC;Sw,HQW,NSW Smith Creek (Wake Forest Reservoir) NEU02 27-23-(1.5) D25NW1 WS-II;HQW,NSW,CA Smith Gut NEU10 27-114 H31NE2 SC;Sw,NSW Smith Mill Run NEU06 27-57-21 F27NW4 WS-IV;NSW Snake Branch NEU10 27-123-4-2 H31NE9 SA;HQW,NSW Snake Gut NEU14 27-149-4-2-4 G33SE9 SA;ORW,NSW Snake Hole Branch NEU05 27-84-4 F29SW5 C;Sw,NSW Snipes Creek NEU06 27-57-12 D25SE9 C;NSW Sound Bay NEU13 27-151 G32NE6 SA;HQW,NSW South Bay NEU10 27-143-1 G33SW7 SA;HQW,NSW South Canal NEU10 27-112-1-1-1-2 H31SW1 C;Sw,NSW South Flat River NEU01 27-3-3 B22SE7 WS-III;NSW South Fork Coles Branch NEU02 27-33-3-1 D23SE8 C;NSW South Fork Little River NEU01 27-2-21-2 C22NW3 WS-II;HQW,NSW South Prong Bay River NEU13 27-150-3 G31NEB SC;Sw,NSW South Prong Coxes Creek NEU05 27-70-2 G27NEI C;NSW South River NEU10 27-135 H32NE5 SA;HQW,NSW Southeast Prong Beaverdam Creek NEU02 27-33-15-2 D24SW6 C;NSW Southwest Creek NEU10 27-135-9 H32NE8 SA;HQW,NSW Southwest Creek (Kellys Pond) NEU05 27-80 G28NE2 C;Sw,NSW Southwest Fork NEU13 27-150-6-2 G32SW1 SC;Sw,NSW Southwest Prong Beaverdam Creek NEU02 27-33-15-1 D24SW5 C;NSW Southwest Prong Lewis Creek NEU14 27-149-3-1 H33NE5 SA;ORW,NSW Southwest Prong Slocum Creek NEUSO 27-112-1 H31SW2 C;Sw,NSW Sowell Run NEU07 27-86-21-2 P28NW9 C;Sw,NSW Bps Branch NEU10 27-115-7-1 H31NE8 SC;Sw,NSW Speight Branch NEU02 27-43-3.5 E23NE3 WS-III;NSW Spice Creek NEU10 27-141-3-1 G32SW3 SA;HQW,NSW Spring Branch NEU02 27-23-4-1 D24NE3 C;NSW Spring Branch NEU06 27-57-20 E26SW9 C;NSW Spring Branch NEU05 27-80-5 G28NE4 C;Sw,NSW Spring Branch NEU07 27-86-17-3 F28NW4 C;Sw,NSW Spring Creek NEU13 27-150-2r-1 G32SE1 SA;HQW,NSW Squirrel Creek NEU05 27-75 G28NW1 WS-IV;Sw,NSW Steep Hill Branch NEU03 27-43-15-16 E24SE6 C;NSW Still Branch NEU05 27-69 G27NW3 B;NSW Still Gut NEU10 27-115-7-3 H31NES SC;Sw,NSW Still Gut NEU10 27-115-8-1 H31NE4 SC;Sw,NSW Stirrup Iron Creek NEU02 27-33-4-2 D23NE7 C;NSW Stone Creek NEU04 27-52-5 F25SW1 C;NSW Stoney Creek NEU05 27-62 F27NW4 C;NSW Stoney Run NEU05 27-62-0.5 F27NW5 C;NSW Stony Branch NEUO8 27-94 G30NW5 C;Sw,NSW Stony Creek NEU01 27-2-13-(1) C22SE5 C;NSW Stony Creek NEU01 27-2-13-(2) C22SE8 WS-IV;NSW Page 19 of 23 2011-07-16 07:24:02 ECS CAFZOLINAS, LLP "Setting the Standard for Service" . Geotechnical • Construction Materials • Environmental • Facilities NC Raglstmd Engimenng F4rn F-1078 May 25, 2011 Mr. Don Nichols Carlisle Corporation 263 Wagner Place Memphis, Tennessee 38103 Reference: Report of Infiltration Testing Proposed Wendy's Havelock, Craven County, North Carolina ECS Project No. 22.16811 Dear Mr. Nichols: ECS Carolinas, LLP (ECS) recently conducted infiltration testing for the proposed stormwater best management practice (BMP) area at the proposed Wendy's site in Havelock, Craven County, North Carolina. This letter, with attachments, is the report of our testing. Field Testing On May 24, 2011, ECS conducted an exploration of the subsurface soil and groundwater conditions at two requested location shown on the attached Test Location Plan (Figure 1). The borings were field located utilizing a boring location plan provided by Civil Designs, PA. The purpose of this exploration .was to obtain subsurface information of the in -place soils for the proposed stormwater BMP area. ECS explored the subsurface soil and groundwater conditions by advancing a hand auger boring into the existing ground surface at the requested boring locations. ECS visually classed the subsurface soils and obtained representative samples of each soil type encountered. ECS also recorded the groundwater level and the seasonal high water table (SHWT) observed at the time of the hand auger borings. The attached Infiltration Testing Form provides a summary of the subsurface conditions encountered at the hand auger boring locations. The groundwater level and the SHWT were estimated at the boring locations below the existing grade elevation. A summary of the findings are as follows: ECS has conducted infiltration testing utilizing a compact constant head permeameter near the hand auger borings to estimate the infiltration rate for the subsurface soils. Infiltration tests are typically conducted at two feet above the SHWT. If the SHWT is less than three feet, the tests are conducted at ten inches below the surface elevation. 7211 Ogden Business Park, Suite 201, Wilmington, NC 28411 • T: 910-686-9114 • F: 910-686-9666 • www.ecslimited.com ECS Capitol Services, PLLC • ECS Carolinas, LLP • ECS Florida. LLC • ECS Midwest, LLC • ECS Mid -Atlantic, LLC - ECS Southeast, LLC • ECS Texas, LLP Report of Infiltration Testing Proposed Wendy's Havelock, Craven County, North Carolina ECS Project No. 22.16811 May 25, 2011 Field Test Results Below is a summary of the infiltration test results: 'Location Description Depth Inchest, hour 1 Gray silty SAND 10 inches 0.37 2 Gray/orange sandy CLAY 10 inches 0.035 Infiltration rates and SHWT may vary within the proposed site due to changes in elevation and subsurface conditions. Closure The activities and evaluative approaches used in this assessment are consistent with those normally employed in assessments of this type. ECS's testing of site conditions has been based on our understanding of the project information and the data obtained during our field activities. ECS appreciates the opportunity to provide our services to you on this project. If you have any questions concerning this report or this project, please contact us at (910) 686- 9114. Respectfully, ECS CAROLINAS, LLP 1Y,&6,Vk �41� K. Brooks Wall Project Manager Attachments: Figure 1 - Boring Location Plan Infiltration Testing Form ukd Walid M. Sobh, P.E. Principal Engineer '47 "% CIL ............. 5 021 ri 0 APPROXIMATE BORING LOCATIONS Proposed Wendy's Havelock, NC ECS Project # 22.16811 May 24,2011 KBW C1 Figure I— Boring Location Plan Provided by: Civil Designs, PA Infiltration Testing Form Proposed Wendy's Site, Havelock, Craven County, North Carolina ECS Project No. 22.16811 May 25, 2011 Location Depth 1 0-24" 24"-48" 48"-60" Soil Description Gray silty SAND Gray/orange clayey SAND Gray/orange sandy CLAY Seasonal High Water Table was estimated to be at 24 inches below the existing grade elevation. Infiltration Rate: 0.37 inches per hour Test was conducted at 10 inches below existing grade elevation Groundwater was encountered at 50 inches below the existing grade elevation. Location Depth Soil Description 2 0-10" Gray silty SAND 10"-60" Gray/orange sandy CLAY Seasonal High Water Table was estimated to be at 20 inches below the existing grade elevation. Infiltration Rate: 0.035 inches per hour Test was conducted at 10 inches below existing grade elevation Groundwater was encountered at 50 inches below the existing grade elevation.