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HomeMy WebLinkAboutSW8060118_HISTORICAL FILE_20060920STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW����� DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE WYYMMDD NCDENR North Carolina Department of Environment and Natural Resources Michael E. Easley, Govemor September 20, 2006 MEMORANDUM: TO: FROM: SUBJECT: Applicant: UIVISion of Coastal Management Charles S. Jones, Director Linda Lewis Stormwater Division of Water Quality William G. Ross Jr., Sacretary 0Co LIP 1� Doug Huggett, Major Permits Coordinator CAMA / Dredge & Fill Permit Application Review NC DOT / Second Bridge to Oak Island (R-2246) Project Location: Between NCSR 1104 and NC Hwy 211, adjacent to the AIWW and Big Davis Canal, between the Town of Oak Island & Midway, in Brunswick Co. Proposed Project: To construct a roadway, known as the second bridge to Oak Island. Please indicate below your agency's position or viewpoint on the proposed project and return this form by October 11, 2006. If you have any questions regarding the proposed project, please contact Jim Gregson at (910) 796-7266, when appropriate, in-depth comments with supporting data is requested. - REPLY: This agency has no objection to the project as proposed. This agency has no comment on the proposed project. This agency approves of the project only if the recommended changes are incorporated. See attached. This agency objects to the project for reasons described in. the attached comments. SIGNED 6x�J DATE 10 16o­ ZCXto 127 Cardinal Drive Ext., Wilmington, North Carolina 28405-3845 Phone: 910-796-7215 l FAX: 910-395-39641 Internet: www.nccoastalmanagement.net An Equal Opportunity t A€€irrnadve Action Employer — 50% Reryded 110% Post consurnec Paaer State Stormwater Management Systems Permit No. SW8 060118 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO NCDOT R-2245 2"d Oak Island Bridge and Road New Route from SR 1004 Oak Island to NC 211, Brunswick County FOR THE construction, operation and maintenance of an infiltration basin and StormTech (or equivalent) underground infiltration chambers, in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until May 15, 2016, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has-been approved for the management of stormwater runoff as described in Sections 1.6 and 1.7 on page 3 of this permit. The stormwa�er controls have been designed to handle the runoff from 61,630 ft2 and 14,861 ft respectively, of impervious area. Each infiltration facility must be operated with a 50' vegetated filter. 3. The remainder of the linear road project will utilize grassed swales for treatment of the runoff. 3. The drainage area for each proposed stormwater facility will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. 4. All stormwater collection and treatment systems must be located within the DOT right-of-way or in recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. Page 2 of 7 State Stormwater Management Systems Permit No. SW8 060118 5. 0 7 The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. The infiltration basin provides treatment for the runoff from the southern half of the larger bridge. The following design criteria have been provided in the infiltration basin and must be maintained at design condition: a b. C. d. e. f. h. J_ k. I. m n. o. Drainage Area, 9cres. Onsite, ft Offsite, ft2: Total Impervious Surfaces, ft2: Design Storm, inches: Basin Depth, feet: Bottom Elevation, FMS�: Bottom Surface Area, ft Bypass Weir Elevation, FMSi Permitted Storage Volume, ft : Type of Soil: Expected Infiltration Rate, in/hr: Seasonal High Water Table; FMSL: Time to Draw Down, hours: Receiving Stream/River Basin: Stream Index Number: Classification of Water Body: 1.415 61,630 0 61,630 1.5 3.0 23.0 4,308 24.5 8,668 Wando Variant 64 20.5 1 Intracoastal Waterway 1 Lumber LBR59 15-25 "SA" The StormTech chambers provide treatment for the runoff from the smaller bridge. The following design criteria have been provided in the Stormtech Chamber System (or equivalent) and must be maintained at design condition: a. Drainage Area, Acres: Onsite, ft : Offsite, ft2: b. Total Impervious Surfaces, ft2: C. Design Storm, inched: d. Chamber Volume, ft : e. Bottom Elevation, FMSL: g. Bypass Weir Elevation, FMSy h. Permitted Storage Volume, ft : i. Required number of StormTech units j. Type of Soil: k. Expected Infiltration Rate, in/hr: I. Seasonal High Water Table, FMSL: M. Time to Draw Down, hours: n. Receiving Stream/River Basin: o. Stream Index Number: p. Classification of Water Body: II. SCHEDULE OF COMPLIANCE 0.34 14,861 0 14,861 1.5 74.9 with 6" stone 81.6 with 12" stone 88.4 with 18" 11.75 14.25 1,765 24 with 6" stone 22 with 12" stone 20 with 18" stone Dredge Spoil 23 <11 <1 ICWW (Davis Canal) 1 Lumber LBR59 15-25 "SA" 1. The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. Page 3 of 7 State Stormwater Management Systems Permit No. SW8 060118 3. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 4. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of slopes and the vegetated filter. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of bypass structure, infiltration media, flow spreader, catch basins, piping and vegetated filter. g. A clear access path to the bypass structure must be available at all times. 5. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ. The records will indicate the date, activity, name of person performing the work and what actions were taken. 6. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. A modification may be required for those deviations. 7. If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 8. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of ail or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 9. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 10. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of ten years from the date of the completion of construction. Page 4 of 7 State Stormwater Management Systems Permit No. SW8 060118 11. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame, specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. III. GENERAL CONDITIONS This permit is not transferable except after notice to and approval by the Director. In the event of a change of ownership, or a name change, the.permittee must submit a formal permit transfer request to the Division of Water Quality, accompanied by a completed name/ownership change form, documentation from the parties involved, and other supporting materials as may be appropriate. The approval of this request will be considered on its merits and may or may not be approved. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. 2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances, which may be imposed by other government agencies (local, state, and federal) having jurisdiction. 4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. 5. The permittee grants DENR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. 6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. 7. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 8. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 9. The permittee shall notify the Division any name, ownership or mailing address changes within 30 days. Permit issued this the 15th day of May 2006. NORTH,E;AROLINA ENVIRONMENTAL MANAGEMENT COMMISSION 0x3 forAla"ri-W. Klimek, P.E., Director Division of Water Quality By Authority of the Environmental Management Commission Page 5 of 7 .r STATE OF NORTH CAROLINA DEPARTMENT OF TRANSPORTATION MICI [AEL F. EASLEY LYM)o TIPPEIT GDVER..NOR SECRETARY 13 APR 06 PROJECT NO.: 34407.1.1 (R-2245) F.A. No.: STP-1105(6) COUNTY: Brunswick DESCRIPTION: New Route from SR 1004 (Beach Drive) to NC 211 (Second Bridge to Oak Island) MEMORANDUM TO: Linda Lewis FROM: Ray D. Lovinggood, PE I�191 SUBJECT: Response to your e-mail, dated 7 APR 06C�g�� 5;,38 a �vo 4k8 APR 18 2006 Mrs. Lewis, Thank- you for reviewing the application for the stormwater permit for the subject project. I regret our submission was not complete and I hope my statements contained within this memo will adequately answer your questions. 1. Details for the splitter boxes and storm chambers are included with this memo. Also. I have included my calculations for the required volume and a stage storage relationship for the infiltration basin. My calculations show a storage elevation of 24.3' +/- for the design event. 2. Original signatures are now provided. 3. Plans with drainage areas delineated are provided. 4. As mentioned in No. 1, the stage storage relationship is provided. We are providing this for the basin, but not for the storm chambers. Since we cannot select proprietary chambers. each manufacturer may have different dimensions. Therefore, we are requiring the contractor to meet performance goals of providing storage for 1,765 cubic feet of stormwater runoff with the weir elevation shown on the plans. 5. The runoff for the 2" d bridge (the larger bridge that crosses the Intracoastal Waterway) is collected and infiltrated only for the southern half of the bridge. Runoff from the northern half of the bridge is discharged at —L- Sta 65+90 Lt where it will infiltrate into the dredged material that the roadway is built upon. The infiltration rate for this material has been measured at 81.69 inches per hour. If you have any questions; please call me at 1.919.250.4100 MAILING ADDRESS: TELEPHONE: 919-250-4100 LOCATION: NC DEPARTMENT OF TRANSPORTATION FAX: 919-250-4108 CENTURY CENTER COMPLEX HYQRAUUCS UNIT BUILDING B 1590 MAIL SERVICE CENTER WESSITE: WWW.DON.DOT.STATE.NC.US 1020BIRCHRIDGE DRIVE RALEIGH NC 27699-1590 RALEIGH NC STORMWATER MANAGEMENT PLAN R-2245, State Project 34407.1 Date: 6 APR 05 Brunswick County Hydraulics Project Manager: Max S. Price, Ph ROADWAY DESCRIPTION The project constructs a new, second, route to Oak Island. It begins by widening the existing two lane Middleton Avenue on Oak Island and runs north, crossing the Atlantic Intracoastal Waterway with a new high rise bridge. continuing on a new route on the mainland. It terminates at the intersection of NC-21 1 and SR 1500, Midway Road. The overall length of the project is 4.52 miles with 0.92 miles on Oak Island and the remaining 3.60 miles on the mainland. Starting near the ocean, the initial 1,700 feet of the project maintains two lanes, but widens the road from 20 feet to 22 feet and adds 4 foot wide paved shoulder to both sides. The road then begins a taper, widening to provide 5 lanes up to the southern end of the bridge over the hitracoastal Waterway. From this point to the northern terminus, the road provides two lanes in each direction with a raised median separating the traffic. On the island, the roadway crosses Davis Canal. The project will cross the canal at the same location, but with a new bridge. The roadway will be closed during construction of the new bridge. The majority of the roadway uses open shoulders. Gutters are used only on approaches to the two bridges. On the mainland portion of the project, the 17.5 foot wide median is raised, with concrete curb and gutter bordering the mounded, grassy median. The typical section shows the pavement slopes away from the median, draining to the grass shoulders and fill slopes. All fill slopes are 3:1 or flatter except in wetland areas where they are held to 3:1. A third major stream crossing occurs on NC-21 1, approximately 540 feet east of the intersection with SR 1500. There, an existing box culvert will be removed and replaced with a larger culvert. ENVIRONMENTAL DESCRIPTION Land Use Beach homes dominate the project area on Oak Island while the corridor on the mainland remains undeveloped. Not far off the mainland corridor; development of the St. James community continues, pushing towards the project route. Alon- NC-21 1, at the northern end of the project, only one small business and one small home exist now, but the addition of a sanitary sewer line; currently underway, will undoubtedly bring growth. Topography and Water Resources The project is located in the Lumber River Basin in the Coastal Plain Physiographic Province. Elevations in the project area range from a low of near seven feet to a high of R-2245 SMP 6 APR 05 approximately 63 feet. The minimum elevation occurs on Oak Island near the ocean and the maximum elevation occurs between the two largest Carolina Bays in the central portion of the project area. North of the apex. the elevation drops to about 45 feet at the intersection of the —L- line with NC-211, creating a slope of about 2 percent. South of the apex, the elevation drops to sea level at the Atlantic Intracoastal Waterway, giving a slope of about 8 percent. Descending the scarp to the Quaternary -aged deposits largely accounts for the steeper slope. Soils in the southern portion of the project area are better drained than in the northern part. The project —L- line crosses three jurisdictional surface waters: Davis Canal on Oak Island: the Atlantic Intracoastal Waterway which separates Oak Island from the mainland; and, a small, unnamed tributary on the mainland. NC-211 (-Y7-) crosses "River Swamp" with an existing box culvert. Both Davis Canal and the Intracoastal Waterway are SA waters. The unnamed tributary, an intermittent channel through a wetland, is not classified, but it drains to the Intracoastal waterway. This channel will be carried under the —L- line by two 60" diameter concrete pipes, both set one foot below natural ground level. Approximately 207 feet of this stream will be permanently impacted due to the crossing and about 0.010 acres of permanent surface water impacts will also result from the crossing. We estimate temporary surface water impacts at this site will measure 0.002 acres. River Swamp has been classified as C and Sw water. Currently, water runs through a culvert of two different sizes; it appear to have been built with an initial size of 6'wide by 4' high, then extended on both ends with a size of 6' wide by 5' high. The extensions, each measuring about 7 feet in length, maintain the same top slab elevation, but use bottom slabs that drop one foot below the central, smaller portion. The project will replace this multi -sized culvert with one 10' wide by 8' high box culvert. The larger size will convey stormwater runoff expected from the developing area. Estimated impacts include: 0.009 acres surface water (permanent impact); 0.011 acres surface water (temporary impact); 34 feet of channel impact (permanent); and; 61 feet of channel impact (temporary.) . 29 wetland sites will be crossed by the project with fill sections, impacting the wetlands with permanent roadway fill and mechanized clearing. One small wetland area, located in the southwest quadrant of the —L- line intersection with NC-21 1 will require a roadway ditch. There is an existing ditch, presently within the wetland; running along the south side of NC-21 1 and the project will require this ditch to be pushed out from 10 to 15 feet further into the wetland. Total impacts to wetlands caused by pernnanent fill are estimated at 18.643 acres. BEST MANAGEMENT PRACTICES AND MAJOR STRUCTURES Best Management Practices (BMPs) and measures used on the project are an attempt to reduce the stormwater impacts to the receiving streams due to erosion and runoff. The primary BMP is the use of grassed shoulders, as opposed to a curb and gutter roadway drainage system. Rip rap lined ditches are used only near the stream under NC-211. There, the stream banks are lined with rip rap where the two roadside ditches flow down 2 R-2245 SNIP 6 APR 05 the banks and into the channel. On the mainland, the outside shoulders and fill slopes are grass, requiring no stormwater collection system. Along the median in the curves, inlets intercept storm water and pipe it to the toe of slope. There, the stormwater will infiltrate into the existing soils. Rip rap pads are used at each outlet to aid in energy attenuation and flow dispersal. Most inlets are single inlets, collecting small areas of roadway runoff, and discharging the small flow to the adjacent land. The largest system on the mainland consists of three inlets and one outlet. This design was used to keep the outlet outside of a wetland area. The one jurisdictional stream crossing on the mainland by the —L- line will be made by using two 60" concrete pipe culverts. These culverts will be placed one foot below natural ground level. In the wetland areas. 48" concrete pipes are placed across the —L- line to promote equalization of water levels. Typical spacing is 200 feet and, as for the pipe culvert, these pipes will be placed one foot below natural ground level. The new bridge crossing Davis Canal will carry stormwater in the shoulder area to inlets off of the bridge on the northern end. From there, the water will be conveyed to a "splitter box", dividing the first flush to "infiltration chambers." The first flush, consisting of the runoff from the first 1.5 inch of rainfall, will enter the buried chambers and infiltrate into the sandy soil. The bypass flow will be diverted away from the infiltration chambers and will flow through a grass swale to the Davis Canal. The Swale length is greater than 170'. The new bridge crossing the hitracoastal Waterway will carry stormwater in the shoulder area, just like the Davis Canal bridge. And as with the Davis Canal bridge, no deck drains will be allowed. Off the southern end of the bridge, storm water will be collected in a series of inlets and piped to a splitter box, similar to the one for the Davis Canal. Here, the runoff from the first 1.5 inch of rainfall will be directed to an infiltration basin. Bypass flows will be directed to an infiltration channel, located along both sides of the fill slopes for the southern approach to the bridge. Based on the topography and sand - soils, bridge deck storm water runoff will not enter SA waters except during large rainfall events, probably exceeded the 100 year event. Stormwater from the northern end of the bridge collects in inlets off of the bridge deck and is piped to an outlet on the west side of the fill slope. At this location, the roadway is built atop of a sandy spoil pile created by construction and dredging of the Intracoastal Waterway. A soil boring and resultant testing show a high rate of infiltration will occur. Therefore, no additional devices, such as the "storm chambers" used on the Davis Canal or the infiltration basin used for the southern half of the Intracoastal Waterway bridge, are necessary. During large storm events, if the runoff does not infiltrate, it will sheet flow towards a non jurisdictional pond within the spoil pile area, located approximately 350' west from the pipe outlet. 3 Re: SW8 060118 R-2245 2nd Bridge to Oak Island i Subject: Re: SW8 060118 R-2245 2nd Bridge to Oak Island From: "Max S. Price, P.E." <mpricc@dot. state. nc.us> Date: Wed, 26 Apr 2006 15:48:27 -0400 To: Linda Lewis <linda.lewis@ncmail.net> Linda I will try to help with the confusion if I can. Yes , a splitter box is a junction box with a weir. Davis Canal Bridge The detail on the letter size page that is labled splitter box is a detail that was included in the submittal to show the relationship of the splitter box (traffic bearing junction box ) to the storm chamber, the chamber volume and stone base. This detail references the traffic bearing junction box detail for dimensions and materials. The ledger size detail labled "Detail of Traffic Bearing Junction Box" is being modified today to show the splitter box and the chamber in one detail. The title will be changed to " Detail of Traffic Bearing Splitter Box." Intracoastal• Waterway Bridge The ledger size detail labled "Detail of Junction Box" is.being modified also. The title will be "Detail of Splitter Box". We are unable to use just one detail since the pipe orientations are different and because the splitter box at the Davis Canal site must be beefed up as a result of its proximity to traffic. I will Fedex two revised detail sheets tommorrow. Sorry for the confusion. Max Price Hydraulics Linda Lewis wrote: Max: I'm a little confused. is a splitter box the same as a junction box? You've provided details for both a splitter box and a junction box, but both details show a weir. There should be only one inlet structure to the basin and the "stormchamber" type system with a weir. Please be consistent in labeling the details and matching them up to the plans. Please remove references to either the splitter box or to the junction box and just have one structure and one detail with a weir. If the inlet structures for the Chamber system and the basin are similar, you can use a typical detail and list the pertinent elevations for each system below the detail. If the inlet structures are not similar, please provide separate details for each inlet structure labeled as either a splitter box or a junction box for the basin or for the Chamber system. 1 of 2 4/26/2006 5:28 PM Re: SW8 060118 R-2245 2nd Bridge to Oak Island Linda Max S. Prise, P.E. wrote: I Hello Linda I was just checking in to see if ya'll recieved the additional information that was FEDXed on 4/I7/06 for the subject project. And to see if any additional information is required. Not trying to bug ya but people here keeping asking me. Max Price Hydraulics 2 of 2 4/26/2006 5:28 PM SW8 060118 (R-2245 2nd Oak Island Bridge) Subject: SW8 060118 (R-2245 2nd Oak Island Bridge) From: Linda Lewis <linda.lewis@ncmail.net> Date: Fri, 07 Apr 2006 11:58:54 -0400 To. "Max S. Price" <mprice@dot. state. nc.us> CC: Melba McGee <Melba.McGee@ncmai1.net> Max: I've reviewed the information you sent me on March 24, 2006. I have a few questions/requests for information: 1. Please add details for the splitter box and storm chamber. The splitter box detail should show the weir elevation corresponding to the 1.5" storage elevation in the basin, currently indicated as 23.6. 1f the required 1.5" design volume is 7,600 cubic feet, as reported on the supplement, then the corresponding storage elevation will be much higher than 23.6. Based on my preliminary calculations using the basin areas scaled from the plans, the storage elevation would be somewhefe around 24.3. 2. Please provide documents with original signatures. I can't accept photocopies. 3. Please delineate the drainage area for the infiltration basin and the infiltration storm chamber. 4. Please provide detailed calculations of how the required design volumes were determined and a table of the elevations, surface areas, incremental volumes and accumulated volumes for the infiltration basin and storm chamber. For example, the supplement for the infiltration basin reports that the design volume is 7600 cubic feet, however, I am unable to find how this was determined, since no drainage area information was provided and the calculations are incomplete. what was the method of calculating this volume? Our BMP Manual offers a "simple method" for calculating runoff volume, which is the method we use. 5. is the runoff from all of the 2nd bridge collected and treated? This question should be answered by the delineation of the drainage area for each infiltration facility. Linda of 1 4/7/2006 1 1:54 AM P NC DEPARTMENT OF TRANSPORTATION Transmittal Slip Date:3 1l D To: Mrs. Linda Lewis NCDENR Courier: 04-16-33 From: Ray Lovinggood, P.E. NCDOT Hydraulics Unit TIP: R-2245 BRUNSWICK CO. The following is transmitted for your use. If you have any questions or comments, please contact me at 250-4100. i—i Drainage Plans (cadd files) I ] Drainage Plans (redlines) r Bridge Reports i Culvert Reports I -a Detour Bridge Reports I i Construction Sequence (box culverts) r, Pipe Data Sheets 1 i Structure Survey Recommendations r Pipe Material Recommendations r Permit Action Letter (cc) ri Drainage Structure & Grate Summary G Other Comments: Davis Canal and ICWW Set of roadway plans Roadway plans consists of: Title Sheet, sheets 1-B, 2, 2-A, 2-B, 2-C, 2-D An unnumbered sheet showing detail of infiltration basin and swales near ICWW bridge Plan sheets 4-26 Profile sheets 27-38 J lid L= L%�Z—� Ili 1 U= M= C=1 R.w"'I!"3D E! S&ME "IN -SITU" CONSTANT HEAD I'MMEAMETER Ua te: 9/16/2004 Location: Ksat 6 Horizon: C Client: NCDO'r Project Name: Oak Island NCDOT Project Project 4: 1051-04-188 Ksat = CQI(2Pile) C = sinit'r (111r) - 1(r111)1 + I I" + r/ll Hole De the 1.83 Feet Hole Radius (r): 0.09 Feet Bubble Tube to Surface: 0.25 Feet Reference Tube to Bole Bottom 1) : 2.08 Feet Water Depth in hole 11 : 0.16 Feet CIIT Tubc(s) Setting (1h): L92 Feet Chamber Used: 0.11 - I t� Initial Waterin hole: 0.16 Fcct Final Water in hole: 0.16 beet sink` = inverse hyperbolic sin of a number I1 = I[eight of water in hole (cm) r = radius of hole (cm) Q — Constant Flow Rate (GaUday) = Cross Sectional Area of Resevior x Length of Drop in Water Column over Time r — 0.08 ft Time Drop in Water Column (ft) 11= 0.16 ft 0-5 min. 0.492 'rime (min) = 5 5 - 10 min. 0.705 C = 0.83 12 - 17 min. 0.837 Q = 187.49 Gallons/Day 17 - 22 min. 0.754 23 - 28 train. 0.902 28 - 33 min. 0.722 34 - 39 min. 0.840 39 - 43 min. 0.748 Avg. 0.770 Cross Sectional Area = O.l l fl, Length of Drop in Water Column = 221.76 ft/day Ksat = 062.85 Gallons/Day/ft2 Inches/flour= 64.36 Note: Ksat calculations are based on average drop in Water Column (ft) after equilibrium is reached. Prepared by: 5&Mt:. Inc. Martin Mahe adjustable rur tube constant -head tube flow measuring ht • reservoir J h reference level d constant water level I) H� rz2 u. rarEurnx Page 6 9120104 S&ME, INC. SOIL PROFILE DESCRIPTIONS 1 C W W SITE Client: North Carolina DOT Date: 9-16-04 Project Name: Oak Island Project No. 1051-04-188 County: Brunswick State NC Location: Oak Island, NC Site/Field No. Ksat-6 Soil Series: Wando Variant Apparent Water Table: >72 Inches Seasonal High Water Table: >72 Inches Vegetation: Pines & Oaks Slope: 0-1 % Boring Terminated at 72 Inches Horizon Depth Matrix Mottles Texture Structure Consistence Boundary O 2-0 - - sl - - cs A 0-5 10YR 7/1 - s sg ml gw C 1 5-8 10YR 7/4 - s sg ml gw C2 8-17 2.5Y 7/6 - s sg m1 gw C3 17-25 2.5Y 6/6 - s sg ml gw C4 2546 2.5Y 7/3 - s sg ml gw C5 46-72+ 2.5Y 8/2 - s sg ml - COMMENTS: LEGEND: Attached at the end of logs DESCRIBED BY: Rob Willcox DATE 9-16-04 Date: 9/ 17/2004 Location-. Ksat 3 Horizon. C Client: NCDOT Project Name: Oak Island NCDOT Project Project4: 1051-04-188 OMM - 'Plum 1. 1=11 R'MWJ MM71 1 81 U t S&ME "IN -SITU" CONSTANT1IIsAD PERNW,AMETER Hole Ile the 2.08 Feet Hole Radius (r): 0.08 Feet Bubble Tube to Surface: 0.25 Feet Reference Tube to Itole Bottom U : 2.33 Fcel Water De th in Hole 11 : 0.16 Fee! CRT Tubc(s) Setting (IN): 2.17 Feet Chamber Used: 0•11 V PtZ Ksat = CQ/(2Pile) Initial Water in hole: 0.16 Feet Final Water in Hole: 0,16 Feet C = sinh-I (ll/r) - l(r/11)2 + I]" + r/11 sinli t = inverse hyperbolic sin of a number 11 = Height of water in hole (cm) r = radius of hole (cm) Q = Constant Flow Rate (Gal/day) = Cross Sectional Area of Resevior x Length of Drop in Water Column over Time r= 0.08 ft Time .Drop in Water Column (ft) H = 0.16 ft 0-5 min. 0.269 Time (min) = 5 5 - 10 min. 0.259 C = 0.83 10 - 15 min, 0.311 Q = 67.77 Gallons/Day 15 - 20 min. 0.262 20 - 25 min, 0.262 Avg. 0.278 Cross Sectional Area = 0.11 ft2 Length of Drop in Water Column = 80.16 May Ksat = 348.04 Gallons/Day/ft2 Inches/Ilaur= 23.26 Note: Ksat calculations are based on average drop in Water Column (ft) after equilibrium is reached. Prepared by; MME, Inc, Martin Mabe adjustable wr tube constant -brad tube hI t (]ow measuring reSerVnif h2 atetence level constant water level b ]t . s n.IefaMEABce IAvex Page 3 9RD/04 Client: Project Name: County: Location: Soil Series: Apparent Water Table: Vegetation: Boring Terminated at S&ME, INC. SOIL PROFILE DESCRIPTIONS DAV 15 CAWAL North Carolina DOT Date: 9-17-04 - Oak Island Project No. 1051-04-18 8 Brunswick State NC Oak Island NC Site/Field No. _ Ksat-3 Fill >72 Inches Seasonal High Water Table: >72 Inches R/W 72 Inches Slope: 1-2 % Horizon Depth Matrix Mottles Texture Structure Consistencea Boundary Fill 0-10 1OYR 6/3 - s sg ml cw Fill 10-21 10YR 5/6 - s sg ml gw Fill 21-27 10YR 3/3 - s sg ml gw C1 27-35 2.5Y 616 - s sg ml gw C2 35-43 2.5Y 6/4 - s sg ml gw C3 43-72+ 2.5Y 6/6 - s sg MI - CONE'v=S: LEGEND: Attached at the end of logs DESCRIBED BY: Rob Willcox DATE 9-17-04 & STATE OF NORTH CAROLINA SUBJECT ti if'q A M 5 @Z- PROJECT DEPARTMENT OF TRANSPORTATION DIVISION OF HIGHWAYS HIGHWAY BUILDING P. O. BOX 25201 K--NEIGH. NORTH CAROLINA 27611 COUNTY PREPARED BY ��DL DATE 2 Z ijo'/ STATION CHECKED BY M(p . DATE - STR NO SHEET- OF- SO-01 R2245 Weir and Infiltration -Coupled Type 11124-hr WQV Rainfall= 1. 70" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net �H droCAD® 7.00 sln 000000 © 1986-2003 Applied Microcomputer Systems 11 /22/2005 Hydrograph for Pond 2P: Infiltration Basin, South Time Inflow Storage Elevation Outflow Primary Secondary (hours) (cfs) (cubic -feet) (feet) (cfs) (cfs) _ (cfs)_ 0:00 0.00 0 23.00 0.00 0.00 0.00 1.00 0.00 0 23.00 0.00 0,00 0.00 2.00 0.00 0 23.00 0.00 0,00 .0.00 3.00 0.00 2 23.00 0.00 0.00 0.00 4.00 0.01 17 23,00 0.00 0,00 0.00 5.00 0.01 40 23.01 0.01. 0.01 0.00 6.00 0.02 70 23.01 0.01 0.01 0.00 7.00 0.03 110 23.02 0.02 0.02 0.00 8.00 0.04 168 23.04 0.02' 0.02 0.00 9.00 0.07 256 23.05 0.04 0.04 0.00 10.00 0.10 388 23.08 0.06 0.06 0,00 11.00 0.16 588 23.12 0.09 0.09 0.00 12.00 1.64 1,689 23.35 0.25 0.25 0.00 13.00 0.20 2,898 23.59 0.42 0.42 0.00 14.00 0.13 2,136 23.45 0.32 0.32 0.00 15.00 0.10 1,556 23.33 0.23 0.23 0.00 16.00 0.07 1,136 23,24 0.17 0,17 0.00 17.00 0.05 831 23,17 0.12 0.12 0.00 18.00 0.04 618 23.13 0.09 0.09 0.00 19.00 0.04 469 23.10 0.07 0.07 0.00 20.00 0.03 371 23.08 0.05 0.05 0.00 21,00 0.03 304 23.06 0.05 0.05 0.00 22,00 0.03 258 23.05 0.04 0.04 0,00 23.00 0.02 222 23.05 0.03 0.03 0,00 24.00 0.02 194 23.04 0.03 0.03 0.00 25.00 0.00 117 23.02 0.02 0.02 0.00 26.00 0.00 69 23.01 0.01 0.01 0.00 27.00 0.00 40 23.01 0.01 0.01 0.00 pR Q W D D t r N C r� 28.00 0.00 24 23.00 0.00 0.00 0.00 29.00 0.00 14 23.00 0.00 0.00 0.00 30.00 0,00 8 23.00 0.00 0.00 0.00 31.00 0.00 5 23.00 0.00 0.00 0.00 32.00 0.00 3 23.00 0.00 0.00 0.00 33.00 0,00 2 23.00 0,00 0,00 0.00 34.00 0.00 1 23.00 0.00 0,00 0.00 35.00 0.00 1 23.00 0.00 0.00 0.00 36.00 0.00 0 23.00 0,00 0,00 0.00 37.00 0.00 0 23.00 0.00 0,00 Q.00 38.00 0.00 0 23.00 0.00 0.00 0.00 39.00 0.00 0 23.00 0.00 0.00 0.00 40.00 0.00 0 23.00 0.00 0.00 0.00 41.00 0.00 0 23.00 0.00 0.00 0.00 42.00 0.00 0 23.00 0.00 0.00 0.00 43.00 0.00 0 23.00 0.00 0.00 0.00 44.00 0.00 0 23.00 0.00 0.00 0.00 46.00 0.00 0 23.00 0.00 0,00 0.00 47,00 0.00 0 23.00 0.00 0.00 0.00 } 48.00 0.00 0 23.00 0.00 0,00 0.00 M STG1RMWATER MANAGEMENT PLAN R-2245, State Project 34407.1 Date: 6 APR 05 Brunswick County Hydraulics Project Manager: Max S. Price, PE ROADWAY DESCRIPTION The project constructs a new, second, route to Oak Island. It begins by widening the existing two lane Middleton Avenue on Oak Island and runs north, crossing the Atlantic Intracoastal Waterway with a new high rise bridge; continuing on a new route on the mainland. It terminates at the intersection of NC-211 and SR 1500, Midway Road. The overall length of the project is 4.52 miles with 0.92 miles on Oak Island and the remaining 3.60 miles on the mainland. Starting near the ocean, the initial 1,700.feet of the project maintains two lanes, but widens the road from 20 feet to 22 feet and adds 4 foot wide paved shoulder to both sides. The road then begins a taper, widening to provide 5 lanes up to the southern end of the bridge over the Intracoastal Waterway. From this pointtothe northern terminus, the road provides two lanes in each direction with a raised median separating the traffic. On the island, the roadway crosses Davis Canal. The project will cross the canal at the same location, but with a new bridge. The roadway will be closed during construction of the new bridpae. The majority of the two bridges. the'roadway uses open shoulders. Gutters are used only on approaches On the mainland portion of the project, the 1'7.5 foot wide median is raised, with conerei curb and gutter bordering the mounded, grassy rnedian. The typical section shows the` pavement slopes away from tlieinedian, draining to the grass shoulders and fill slopes. All fill slopes are 3:1 or flatter except in wetland areas where they are held to 3:1. A third major stream crossing occurs on NC-211, approximately 540 feet east of the intersection with SR 1500. There, an existing box culvert will be removed and replaced with a larger culvert. ENVIRONMENTAL DESCRIPTION! Land Use Beach homes dominate the project area on Oak Island while the corridor on the mainland remains undeveloped. Not far off the mainland corridor, development of the St. James community continues, pushing towards the project route. Along NC-211, at the northern ".. ?: r• r:,i,-sr^.;':•`l Topography and Water Resources The project is located in the Lumber River Basin in the Coastal Plain Physio-raphic Province. Elevations in the project area range from a lo',v of near seven feet to a high of R-2245 BMP's 6 APR 05 approximately 63 feet. The minimum elevation occurs on Oak Island near the ocean and the maximum elevation occurs between the two largest Carolina Bays in the central portion of the project area. North of the apex, the elevation drops to about 45 feet at the intersection of the —L- line with NC-211, creating a slope of about 2 percent. South of the apex, the elevation drops to sea level at the Atlantic Intracoastal Waterway, giving a slope of about 8 percent. Descending the scarp to the Quaternary -aged deposits largely accounts for the steeper slope. Soils in the southern portion of the project area are better drained than in the northern part. The project —L- line crosses three jurisdictional surface waters: Davis Canal on Oak Island; the Atlantic Intracoastal Waterway which separates Oak Island from the mainland-, and, a small, unnamed tributary on the mainland. NC-211 (-Y7-) crosses "River Swamp" with an existing box culvert. Both Davis Canal and the Intracoastal Waterway are SA waters. The unnamed tributary, an intermittent channel through a wetland, is not classified, but it drains to the Intracoastal waterway. This channel will be carried under the —L- line by two 60" diameter concrete pipes, both set one foot below natural ground level. Approximately 247 feet of this stream will be permanently impacted due to the crossing and about 0.009 acres of permanent surface water impacts will also result from the crossing. We estimate temporary surface water impacts at this site will measure 0.002 acres. River Swamp has been classified as C and Sw water. Currently, water runs through a culvert of two different sizes; it appear to have been built with an initial size of 6'wide by 4' high, then extended on both ends with a size of 6' wide by 5' high.- The extensions, each measuring about 7 feet in length, maintain the same top slab elevation, but use bottom slabs that drop one foot below the central, smaller portion. The project will replace this multi -sized culvert with one 10' wide by 8' high box culvert. The larger size will convey stormwater runoff expected from the developing area. Estimated impacts include: 0.010 acres surface water (permanent impact); 0,010 acres surface water (temporary impact); 40 feet of channel impact (permanent); and, 58 feet of channel impact (temporary.) 3 i weuand sites wiii be crossed by the pt-oject With 1,111 sections, impacting the wetlands with permanent roadway fill and mechanized clearing. One small wetland area, located in the southwest quadrant of the —L- line intersection with NC-211 will require a roadway ditch. There is an existing ditch, presently within the wetland, running along the south side of NC-211 and the project will require this ditch to be pushed out from 10 to 15 feet further into the wetland. Total impacts to wetlands caused by permanent fill are estimated at 17.808 acres. b1161-1�3fxd\i�5:(ri�l�'.. i A A _� . _ ES AND l`'LriJ:;� STRUCTURES - Best Management Practices (BMPs) and measures used on the project are an attempt to primary BMP is the use of grassed shoulders? as apposed to a curb and gainer raadway drainage system. Rip rap fined ditches are used only near the stream under ITC-211. There, the stream banks are lined with rip rap where the two roadside ditches flow down R-2245 SMP's 6 APR 05 the banks and into the channel. On the mainland, the outside shoulders and fillslopesare grass; requirtng no stormwater collection systerr�. Along the median in the curves, inlets' �v_ intercept stornz water and pipe it to the toe of slope There, the stormwater will infiltrate into the existing soils. —Rip ap pads are used at each outlet to aid in energy attenuation and flow dispersal. Most.inlets are singlT inlet cset ollecting small areas of roadway runoff, and discharging the small flow to the adjacent land. The largest system on the mainland consists of three inlets and one outlet. This design was used to keep the outlet outside of a wetland area. The one jurisdictional stream crossing on the mainland by the —L- line will be made by using two 60" concrete pipe culverts. These culverts will be placed one foot below natural ground level. In the wetland areas, 48" concrete pipes are placed across the —L- line to promote equalization of water levels. Typical spacing is 200 feet and, as for the pipe culvert, these pipes will be placed one foot below natural ground level. The new bridge crossing Davis Canal will carry stormwater in the shoulder area to inlets off of the bridge on the northern end. From there, the water will be conveyed to a "splitter box", dividing the first flush to "infiltration chambers." The first flush, consisting of the runoff from the first 1.5 inch of rainfall, will enter the buried chambers and infiltrate into the sandy soil. The bypass flow will be diverted away from the infiltration chambers and will flow through a grass swale to the Davis Canal. The swale length is greater than 170'. The new bridge crossing the Intracoastal Waterway will carry stormwater in the shoulder area, just like the Davis Canal bridge. And as with the Davis Canal bridge, no deck drains will be allowed. Off the southern end of the bridge, storm water will be collected in a series of inlets and piped to a splitter box, similar to the one for the Davis Canal. Here, the runoff from the first 1.5 inch of rainfall will be directed to an infiltration basin. Bypass flows will be directed to an infiltration channel, located along both sides of the fill slopes for the southern approach to the bridge. Based on the topography and sandy soils, bridge deck stornl water runoff will not enter SA waters except during large rainfall events, probably exceeded the 50 year event. Stormwater from the northern end of the bridge collects in inlets off of the bridge deck and is piped to an outlet on the west side of the fill slope. At this location, the roadway is built atop of a sandy spoil pile created by construction and dredging of the Intracoastal Waterway. A soil boring and, resultant testing sl,;ow a ii!`5i"i 'E.-r' 3 -;m!h—atlon will occur, Therefore, no additional devices, such as the "storm chambers" used on the Davis Canal or the infiltration basin used for the southern half of the Intracoastal Waterway bridge, are necessary. During large storm events, if the runoff does not infiltrate, it will sheet flow towards anon -jurisdictional pond within the spoil pile area, located al)proximate]v 350' west from the pipe outlet.' . 10 STA& aT" STATE OF NORTH CAROLINA DEPARTMENT OF TRANSPORTATION MICHAEL F. EASLEY GOVERNOR Stormwater Section Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 ATTN-. Linda Lewis Dear Madam: LYNDO TIPPETT SECRETARY December 29, 2005 Xe S r� 2 Subject: Stormwater Permit Application, Second Bridge to Oak Island from SR 1104 (Beach Drive) to NC 211, Brunswick County, TIP No. R-2245, State Project No. 8.2231201. $420.00 Debit work order 8-2231201, WBS Element 34407.1.1 The North Carolina Department of Transportation (NCDOT) proposes to construct a second bridge to Oak Island on new location from SR 1104 to NC 211 in Brunswick County- The NCDOT will be applying for a Section 404, 401, and CAMA permits in the near future. Please find enclosed a stormwater permit application form, stormwater management narrative, infiltration supplements, and one copy of the project plans. Please review this project for authorization by your section of NCDWQ. If you have any questions regarding this project or need additional information, please contact Mr. Max Price of NCDOT Hydraulics Unit at (919) 250-4100, or Mr. Brett Feulner of NCDOT Project Development and Environmental Analysis Branch at (919) 715-1488. Sincerely, �� ?c 14Q�c Gregory J. Thorpe, Ph.D., Environmental Management Director Project Development and Environmental Analysis Branch W/out attachment Dr. David Chang, Hydraulics Mr. Dave Timpy, USACE, Washington RECEIVED Mr. Brian Wrenn, NCDWQ Mr. Steve Sollod, NCDCM JAN 0 6- 2006 Mr. Bill Arrington, NCDCM Mr. Joseph Qubain, PDEA File MAILING ADDRESS: TELEPHONE: 919-715-1500 NC DEPARTMENT OF TRANSPORTATION FAX: 919-715-1501 - PROJECT DEVELOPMENT AND ENVIRONMENTAL ANALYSIS 1598 MAIL SERVICE CENTER WEBSITE. WWWDON.DOT.STATE.NC.US RALEIGH NC 27699-1598 LOCATION: 2728 CAPITOL BOULEVARD PARKER LINCOLN BUILDING, SUITE 168 RALEIGH NC 27699 r JUSTIFICATION FOR CERTAIN REQUIREMENTS ON . REQUIRED ITEM CHECKLIST NOT BEING MET R-2245, State Project 34407.1 Date: 14 NOV 05 Brunswick County Hydraulics Project Manager: Max S. Price, PE DAVIS CANAL BRIDGE Item h. System is not sited on or in fill material or DWQ approval has been obtained. The location for the infiltration chambers was discussed with regional DWQ staff. Item n. A pretreatment device (filter strip, grassed swale, sediment trap, etc.) is provided. The proposed drainage area is comprised entirely of bridge deck and paved shoulder. Sedimentation should not be a problem, and large debris will be prevented from entering the system by the bridge deck drain size and grated inlets. Item o. Trench bottom is covered with a layer of clean sand to an average depth of 4 inches. The storm chambers will be bedded on a minimum of six inches of washed no. 57 stone. Item r. Side to bottom ratio is less than 4:1. The storm chambers are buried in a trench that will have vertical walls and backfilled with native, sandy material. There will not be an open trench or swale providing infiltration with this installation. INTRACOASTAL WATERWAY BRIDGE Item 1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or sediment trap is provided. The proposed drainage area is comprised entirely of bridge deck and paved shoulder. Sedimentation should not be a problem, and large debris will be prevented from entering the system by the bridge deck drain size and grated inlets. R-2245 Stormwater Management Permit Application Item n. Vegetated filter is provided for overflow and detail is shown on plans (Requred minimum length is 50 feet for SA waters, 30 feet for other waters). The proposed design provides for infiltration of the overflow and does not convey the overflow to any receiving channel or body of water. The overflow "swales" are similar to the main infiltration basin, but uses side slopes of 4:1 rather than the 6:1 in the main basin. The steeper sides were required to fit the swales in the available space. NOR TH CAROLINA BRUNSWICK COUNTY PROJECT LOCATION NCDOT ®`L � � � ®� DIVISION OF HIGHWAYS sRUNSWICK COUNTY PROJECT 34407.1.1 (R-2245) MAPSECOND BRIDGE TO OAK ISLAND SHEET OF SITE AP I Of l< Q BOT-liffiffl)11 DIVISION OF HIGHWAYS BRUNSWICK COUNTY PROJECT 34407.1.1 (R-2245) NEW ROUTE FROM SR 1104 (BEACH DR) TO NC 211 (SECOND BRIDGE TO OAK ISLAND) NCD®T SITEDIVISION OF HIGHWAYS BRUNSWICK COUNTY PROJECT 34407.1.1 (R-2245) MAP NEW ROUTE FROM SR 1104 (BEACH DR) TO NC 211 2 (o 4 (SECOND BRIDGE TO OAS. ISLAND) SHEET OF NCI@OT SITEDIVISION OF HIGHWAYS BRUNSWICK COUNTY PROJECT 34407.1.1 (R-2245) MAP NEW ROUTE FROM SR 1104 (BEACH DR) TO NC 211 3 ®f 1 (SECOND BRIDGE TO OAK ISLAND) SHEET OF DIVISION OF HIGHWAYS BRUNSWICK COUNTY PROJECT 54407.1.1 (R-2245) NEW ROUTE FROM SR 1104 (BEACH DR) TO NC 211 (SECOND BRIDGE TO OAK ISLAND) PARCEL PROPERTY E11 TY NAMES AND NO. NAMES OWNERS ADDRESSES ADDRESSES 5 BOBBY A. LONDON 129 HELEN AVE. BESSEMER CITY, NC 28013 7 OAK ISLAND EAST DOLPHIN DRIVE ELKS LODGE #2769 OAK ISLAND, NC 28465 8 JAMES A. FERRELL (no address) 9 HOBOKE, INC. P.O. BOX 433 - OAK ISLAND, NC 28465 11 ROBERT ROBBINS 119 SE 1st STREET OAK ISLAND, NC 28465 _ 104 MAS PROPERTIES 131 OCEAN BLVD. WEST LLC HOLDEN BEACH, NC 28462 106 LADANE WILLIAMSON 130 N. FRONT STREET, STE 201 WILMINGTON, NC -28401 NCDOT DIVISION OF HIGHWAYS BRUNSWICK COUNTY PROJECT 54407.1.1 (R-2245) SECOND BRIDGE TO OAK ISLAND SHEET OF PARCEL PROPERTY NAMES AND NO. NAMES OWNERS ADDRESSES ADDRESSES (not BRUNSWICK ELEC P.O.'BOX 826 numbered) MEMBERSHIP SHALLOTTE, NC 28459 107 CBS LLC 36 RICHMOND PLAZA HWY 74 ROCKINGHAM, NC 28379 109 YOUNGS GAS P.O. BOX 14 & GROCERY OF WINNABOW, NC 28479 WINNABOW INC. NCDOT DIVISION OF HIGHWAYS BRUNSWICK COUNTY PROJECT 34407.1.1 (R-2245) SECOND BRIDGE TO OAK ISLAND SHEET OF WETLAND PERMIT IMPACT SUMMARY WETLANDiMPACTS SURFACE WATERIMPACTS Site No. Station (From/To) Structure Size / Type Permanent Fill In Wetlands ac) Temp. Fill In Wetlands (ac) Excavation in Wetlands (ac Mechanized Clearing in Wetlands ac Hand Clearing in Wetlands ac) Permanent SW impacts (ac) Temp. SW impacts (ac) Existing Channel Impacts Permanent (ft Existing Channel Impacts Temp. ft Natural Stream Design ft 7 ACCESS ROAD 2 CLEARING FOR 0.009 13+65 to 14+05 +1- FENCE 8 82+10 -L- +1- to ROADWAY FILL 0.046 0,020 0.014 83+00 -L- +1- LT " 9 85+95 -L- +/- to ROADWAY FILL 0.099 0.007 86+65 -L- +/- RT 10 1 88+05 -L- +/- to ROADWAY FILL 0.108 0.029 0.035 89+75 -L- +/- LT 11 92+65 -L- +/- to ROADWAY FILL 1.203 0.204 0.151 0.010 0.002 207 52 97+50 -L- +/- 12 108+20 -L- +/- to ROADWAY FILL 1.013 11 0.159 0.055 112+65 -L- +1- 13 120+85 -L- +1- to ROADWAY FILL 1 0.029 0.041 0.015 123+05 -L- +1- LT 14 122+85 -L- +1- to ROADWAY FILL 0.669 0.081 0.023 126+55 -L- +/- TOTALS, This Sheet: 3,167 0.541 1 0.302 0.010 To-521 207 1 52 R,vl,ed MV05 WETLAND PERMIT IMPACT SUMMARY WETLAND IMPACTS SURFACE WATER IMPACTS Site No. Station (From/To) Structure Size 1 Type Permanent Fill In Wetlands ac Temp. Fill In Wetlands (ac) Excavation in Wetlands (ac) Mechanized Clearing in Wetlands (ac) Hand Clearing in Wetlands (ac) Permanent SW impacts (ac Temp. SW impacts ac Existing Channel Impacts Permanent (ft) Existing Channel Impacts Temp. (ft Natural Stream Design (ft 15 127+23 -L- +1- to ROADWAY FILL 0.003 0.007 0.014 127+85 -L- +1- RT 16 136+35 -L- +1- to ROADWAY FILL 0.231 0.045 138+30 -L- +1- RT 17 144+25 -L- +1- to ROADWAY FILL 0.325 0.040 0.030 146+10 -L- +/- LT 18 153+40 -L- +1- to ROADWAY FILL 0.105 0.042 0.035 155+25 -L- +1- LT 19 159+25 -L- +1- to ROADWAY FILL 1.070 0.091 163+65 -L- +1- 20 164+55 -L- +1- to ROADWAY FILL 0.142 0.026 165+70 -L- +1- LT 21 173+70 -L- +1- to ROADWAY FILL 2.388 0.385 0.125 182+40 -L- +/- TOTALS, This Sheet: 4.264 0.636 0.204 M Revived 3131105 WETLAND PERMIT IMPACT SUMMARY WETLAND IMPACTS SURFACE WATER IMPACTS Site No. Station (FromlTo) Structure Size 1 Type Permanent Fill In Wetlands (ac) Temp. Fiilln Wetlands ac Excavation in Wetlands (ac) Mechanized Clearing in Wetlands (ac) Hand Clearing in Wetlands ac Permanent SW impacts (ac) Temp. SW impacts (ac) Existing Channel Impacts Permanent (ft) Existing Channel Impacts Temp. (ft) Natural Stream Design (ft) 22 184+50 -L- +1- to ROADWAY FILL 1.313 0.243 0.222 191 +85 -L- +l- 23 197+05 -L- +l- to ROADWAY FILL 0,161 0.021 0.008 197+70 -L- +!- 24 198+55 -L- +l- to ROADWAY FILL 2.889 0.456 0.089 209+30 -L- +1- 25 208+60 -L- +I- to ROADWAY FILL 2.497 0.411 0,167 219+90 -L- +/- 26 218+65 -L- +1 to ROADWAY FILL 0.013 220+45 -L- +1- LT 27 222+25 -L- +1- to ROADWAY FILL 0.004 0.021 0.007 223+65 -L- +1- RT 28 225+20 -L- +1- to ROADWAY FILL 0.002 225+65 -L- +1- LT 29 229+50 -L- +1- to ROADWAY FILL 0.682 0.123 0.019 u- 235+30 -L- +/- TOTALS, This Sheet: 7.546 1.275 1 0.527 1 -177-7 R-1.ed 3/3V05 WETLAND PERMIT IMPACT SUMMARY WETLAND IMPACTS SURFACE WATER IMPACTS Site No. Station (From/To) Structure Size 1 Type Permanent Fill In Wetlands (ac) Temp. Fill In Wetlands (ac) Excavation in Wetlands (ac) Mechanized Clearing in Wetlands (ac) Hand Clearing in Wetlands (ac) Permanent SW impacts (ac) Temp. SW impacts (ac) Existing Channel Impacts Permanent ft) Existing Channel Impacts Temp. (ft) Natural Stream Design (ft) 30 229+15 -L- +1- to ROADWAY FILL 0.687 0.297 0.091 242+45 -L- +1- 31 236+55 -L- +1- to ROADWAY FILL 0.073 0.015 237+60 -L- +1- LT `32 SOUTH WEST ROADWAY FILL 0.514 0.166 CORNER OF -L- and NC-211 `Drawdown Effect 0.671 33 SOUTH EAST ROADWAY FILL 0.047 0.050 CORNER OF -L- and NC-211 34 24+00 -Y7- 10' w x 8' h RCBC 0.009 0.011 34 61 N C-211 35 ACCESS ROAD 2 HAND CLEARING 0.006 15+65 +1- to FOR 16+45 +1- RIGHT OF WAY FENCE TOTALS, This Sheet: 1.992 0.166 0.312 0.147 0.009 0.011 34 61 NOTE: Area of drawdown as a result of moving existing roadway ditch: 0.671 Acres R-1-d aniroe WETLAND PERMIT IMPACT SUMMARY WETLAND IMPACTS SURFACE WATER IMPACTS Site No. Station (From/To) Structure Size / Type Permanent Fill In Wetlands ac) Temp. Fill In Wetlands (ac) Excavation in Wetlands (ac) Mechanized Clearing in Wetlands (ac) Hand Clearing in Wetlands ac Permanent SW impacts (ac) Temp. SW impacts (ac Existing Channel Impacts Permanent ft Existing Channel Impacts Temp. ft Natural Stream Design ft *1 16+00-L- +/- to ROADWAY FILL 0.099 0.039 19+80 -L- +1- LT "2 15+40 -L- +/- to ROADWAY FILL 0,162 0.047 19+80 -L- +/- RT 3 20+70 -L- +/- to CLASS H RIP RAP FILL 0.04.4 0.001 21+20 -L- +/-. SLOPE PROTECTION & TEMP. WORK BRIDGE -4 21+75 -L- +/- to CLASS II RIP RAP FILL 0.018 0.005 0.001 22+35 -L- +/- SLOPE PROTECTION & MECH. CLEARING 5 56+40 -L- +/- to BRIDGE OVER 60+70 -L- +/- INTRACOASTAL 0.013 WATERWAY 6 75+40 -L- +/- to ROADWAY FILL 1,395 0.142 0,075 83+00 -L- +/- TOTALS, This Sheet: 1.674 0.142 0.161 0.049 0,015 * NOTE: Wetlands at Sites 1, 2, and 4 are Coastal Wetlands Total impacts to Coastal Wetlands: Permanent Fill in Coastal Wetlands: 0.279 acres Hand Clearing in Coastal Wetlands: 0.086 acres SPECIAL EROSION CONTROL FENCE (TEMPORARY FILL) WILL BE PLACED IN SOME AREAS OF MECH, CLEARING. R,M..d 3131105 WETLAND PERMIT IMPACT SUMMARY WETLAND IMPACTS SURFACE WATER IMPACTS Site No. Station (From(To) Structure Size / Type Permanent Fill In Wetlands (ac) Temp. Fill In Wetlands (ac) Excavation in Wetlands ac Mechanized Clearing in Wetlands ac Hand Clearing in Wetlands ac Permanent SW impacts ac Temp. SW impacts (ac) Existing Channel Impacts Permanent ft Existing Channel Impacts Temp. ft ' Natural Stream Design ft 36 ACCESS ROAD 2 HAND CLEARING 0.040 20+55 +/- to FOR 21+95 +/- RIGHT OF WAY FENCE TOTALS, This Sheet: 0.040 PROJECT TOTALS: 18.643 0.166 2.906 1.381 0.068 0.028 241 113 Revised M1105