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Home My WebLink AboutSW8060118_COMPLIANCE_20060515STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW RD4 0��b r%...+ r..,Af 1 r__' CURRENT PERMIT APPROVED PLANS HISTORICAL FILE Lee]'il1Le1a1►&9 a *911 [01T ,ZW = i(YYMMDD =111 of =me M[I = 1 MO: III on 12no ■■■■■�,►►�� Z•��IIiZ�7lL! IIIZmYi,! IIIZZ U IIIZZ ��■■■■■■■■■■■■■■■■■■■■■■■■■ inn■■■■■■■■■■■■■■■■■■■■■■■■■ ■■■■■■■■■■■■■■■■■■■■■■■■■■l ■■■■■■■■■■■■■■■■■■■�■■■■■■i��i■■■■■■��■■■■■■■■■■■■■■■■■�■■■■■■ ONION ■■■■■■1■■■■■■■■■■■■■■m■■■■■■ ■■■■■■■■■■i ■�■■■■■■■■� iiii■ii■iiiiiiiiiiiiiiiiiiiii�■ MINE iiiiiiiiiiiiiiiiii■iiiiiiiiiiiiiii■i■iiiiiiiiiiiiiiiiiii�iiiiiiiiiiiiiiiii iiiiiiiii■iiiii■iiiiiiiiiiiiiiiiiiiiiiiiiiiiii i COEM, E ■ MEW iTl1 uEEI" r ■■■p"PirY u■t f I; lot; t . ■n■■■■r■ew■ lTfbiiTll..'T: 1111120. Ct ■. 1N go u ii �l III III awl mio of IIIZM Z•��M f31lftAiLY III IIr 1 1 I ii ZrArlilk R M■1150're S ill INFORMATION TO BE SHOWN ON PLANS Design: Discharge.---W-A -------------- c.f.s. Frequency-__10_YR--------- Elev. ___6.-9 ----------------- Base Flood: Discharge- -WA ______________ c.f.s. Frequency ____ 100 _ yr'____ Elev. ___-- _3_______________ Overtopping Discharge ---- WA____----c.f.s. Frequency ___10-YR-+------ Elev. 7.3 ------ ---- ------------------ OVERTOPPING OCCURS OVER THE ROADWAYSTA 13+20.87, ELEV = 7.34' ADDITIONAL INFORMATION AND COMPUTATIONS -CHANNEL-IS-STABLE.--BANKS- ARE -GENERALLY _STABLE_ BANKS_ARE SLOUGHED OFF UNDER EXISTING BRIDGE. --------------------------------------------------------------------------------------------------------------------------------- SCOUR COMPUTATIONS --------------------------------------------------- ----------------------------------------------------------------------------- FOR SCOUR CALCULATIONS, SEE THE BRIDGE SURVEY REPORT DATED 16 JUN 97, SEALED BY MARC T. SHOWN, NC PE 20870. HIS CALCULATIONS ARE IN METRIC AND HIS Ys- VALUES, SHOWN HERE, BEEN CONVERTED- ENGLISH UNITS. ----------HAVE-----------------------------TO----------------------------------------------------------------------------------------- CONTRACTION SCOUR Ys = 7.1` --------------------------------------------------------------------------------------------------------------------------------- LOCAL SCOUR ---------MIDDLE PIERS--Ys -- 5.1- ------ - - - - -- -------------------------------------------------------------------------- ---------------------------------------------------------------------------- NOTE: REFERENCE USED FOR TIDE LEVELS --------------------------------------------------------------------------------------------------------------------------------- NOAA STATION "SOUTHPORT" 8659084 SITE DATA Drainage Area .---WA ----------- Source . ---WA -------------------------- Character ___TIDAL CANAL Stream Classification (Such as Trout, High Quality Water, etc.)____SA__________________________________________ Data on Existing Structure 5_SPANS: ---- 2@30'; 1@40'; 1930'; 1@31' TIMBER BRIDGE ON STEEL GIRDERS ----------------------------------------------------------------------------- BELOW 100 YR WITH TIMBER- CAPS- ON- -TIMBER _PILES__TOTAL- SPAN_ =_ 161'._CLEAR_RDWY Watg#way Opening __WSEL QF 12.3': DEBRIS POTENTIAL USUALLY LOW. 1,649 SQ. FT. Debris Potential: Low __X___ Moderate ________ High CHANGES TO HIGH WITH HURRICANES. Data on Structures Up and Down Stream ___THERE ARE NO UPSTREAM NOR DOWNSTREAM STRUCTURES. ---- LOCKWOODS FOLLY INLET TO THE ATLANTIC OCEAN IS WEST OF THE BRIDGE. --------------------------------------------------------------------------------------------------------------------------------- Design Control Elev. .___17.33':__THE-EXISTING--- LOW STEEL ELEVATION ---------- Gage Station No. --- WA --------------------------- Period of Records ----wA------------------------------------- Max. Discharge------W4------------------ c.f.s. Date ------- wA----------- Frequency ---- wA------------- FLOOD INSURANCE STUDY Historical Flood Information: TOWN OF LONG BEACH HURRICANE HAZEL 0 R 2 APR 91 Periodof Date15 OCT 54Eev._11.0__FT.Est.Freq._50_____Source&--- Knowledge --____-- BR-IDGE-URVY -REPORT-FORNC-133 Period of Date ----------- Elev ----------- Est. Freq..-----__ Source OVER INTRACOASTAL WATERWAY Knowledge -------- DATED FEB 1972 Period of Date ----------- Elev ----------- Est. Freq.__------Source----------------------------------------- Knowledge -------- Historical Scour Info. : General _______________ Contraction -------------------------- Local ________________________ Channel Slope .... WA-------- Source ---- N/A ---------------------- Normal Water Surface Elev. Manning's n Left O.B.0 i_____ Channel ___ 0,04 _ Right O.B. ___ 0.1 __ Source ___ FIELD OBSERVATION Flood Study / Status ___ SPECIAL 100 YR FLOOD HAZARD ZONE ______________ Floodway Established? __NO_ Flood Study 100 yr. Discharge ___ WA____c.f.s.; W.S. Elev.: With Floodway ---- WA-- Without Floodway_ 12.3 Ff. DESIGN DATA Hydrological Method .--- wA----------------------------------------------- Hydraulic Design Method _ DESIGN IS BASED ON STORM SURGE Floods Evaluated: Freq. 0 Elev. Backwater Bridge Opening Velocity 100 YR STILL -WATER- ----FROM FEMA 12.3 FT. 1----00 ----YR -------------------------- - vr/WAVE SETUP FROM JEMA 14.8 FT. 500 YR FROM FEMA 15.8 FT. ----------------- --------------------------------- ----------------------- BELOW 100 YR Waterway Opening Provided Below: Design W.S. Elev_________________________ IOOyr W.S. Elev. _ WSEL OF 12.3': 1,6227-SQ FT. ------ Average Channel Velocity (Design) ___ WA ___________ Average Overbank Velocity (Design) __- WA_ Computed Scour : General --- !_r_'A---------- Contraction ____7_1 FT _________ Local Is a Floodway Revision Required? ----W----------------------------------------------------------------- REPORT 1 OF 2 FILENAME: R:\Hydraulics\R-2245 Davis Canal BSR.dgn BRIDGE SURVEY & HYDRAULIC DESIGN REPORT N. C. DEPARTMENT OF TRANSPORTATION DIVISION OF HIGHWAYS HYDRAULICS UNIT RALEIGH, N. C. I.D. No. ____R_2245-------- Project No_ ------------ 34407.1.1---------- Proj. Station ------ —L= STA 21+50.00 County-___BRUNSWICK Bridge Over ____BIG --DAVIS CANAL Bridge Inv. No.206 -------------------------------- .------------ SR 1104 SR 1190 On Highway _SR_1105_(MIDDLETON__AVE-)Between ____(EAST -BEACH-_ DR.) and ___ (WEST OAK ISLAND_ DR.) Recommended Structure .... 3—SPAN- CORED SLAB v,21" SLABS --------------- - - - - 3-�"` 55'' -TOTAL = 165' v-------- --------------------------------------------------- m; - - Recommended Width of Roadway ---- 45'-5" Inside Face to Face of Rails Skew. 0 ---------------------------- z Recommended Location is ( Up, At, Down) Stream from Existing Crossing _______________________________________ V Q Nearest Shipping Point ____LEAD ________ On ____CSX 40 Miles From Bridge L ------------------------ R.R., BM #200 BOLT IN LEFT FRONT LEG OF WATER TOWER —L— STA 15+14.91 62.10` RIGHT EL = CL : Bench Mark Is _ ___-- r----____-- �; 7.95' & BM #201, RRS SET IN 10" OAK, —L— STA 24+99.53, 125dlVvLEFT, EL = 18.90'Datum: --____ NGVD 1929 -------------------- --- cv: clTemporary Crossing ---- NONE- REQUIRED. -ROAD -WILL BE CLOSED- -FOR CONSTRUCTION. ---------------------------------------------- o z -L NC400 ; z c -�1 THE ENGINEER WHOSE m a SEAL IS SHOWN BELOW Q IS RESPONSIBLE FOR ONLY Z: a THE BRIDGE SPAN U« �$ ARRANGEMENT AS SHOWN Tfd1E t WITHIN THIS DOCUMENT. THE SCOUR COMPUTATIONS ARE THE RESPONSIBILITY OF MARC. T. SHOWN, NC PE 20870, AS INDICATED ON BRIDGE SURVEY REPORT C7; DATED 16 JUN 97. v;. ----- CD t V) RAY D. LOVINGGOOD, PE Designedby:._----------------------------------------------- WILLIAM S. ZERMAN, PE Assisted by- ------------------------------------------- -- - Project Engineer: ----- MAX-S- PRICE, PE Reviewed by:------------------------------------------------- Dote - - - Impervious Area Calculation Buildings Streets OS Prkg OS sidewalks Total Volume/Storage Calculation If Rational Method is used, place a 1 in this box Required Provided Design Storm RV Volume to Store Pipe Diameter Length Of a Single run of Pipe Number of Pipe Runs in Trench Storage In Piping Total Storage in Piping Cross -Sectional Area Of Pipe Runs Volume per Stormtech Unit (CF) Required # Stormtech Units Total Volume Provided (CF) Elevation Of Bottom Of Trench Elevation Of SHWT Overflow Elevation Exflltration Rate / Drawdown Reported Hydraulic Conductivity Bottom Surface Area Drawdown Time 25 YEAR 24 HOUR STORM N/A Intensity, i = .33 inches / hour Qr—CiA= Qp through the bottom of the basin= 10 YEAR 10 MIN HIGH INTENSITY EVENT Intensity, i = 6.3 inches / hour Volume for 10 yr. 10 min. event = Filename: S:IWPDATAIWQSIINTRENCH1060118 Rational Cc (list C after each BUA) 1 1 1 % Impervious= 100.0% Cc 1.00 15'in 0.95 1765 CF Feet Feet each Cubic Feet Cubic Feet 0.000 0.000 SF 6" stone 12" stone 18" stone ...... 20 1765. 17,65 0.11 CFS 1.8628 CFS 1289.59 CF < Mean Sea Level Mean Sea Level 14.25 Mean Sea Level 19 Cubic Feet Per Hour Per Sq Ft 3529.5 Square Feet 0.26 hours Must be > Qr #REF! CF � , INFILTRATION BASIN ANALYSIS FILENAME: S:NVQSWNBA8rN\080118,VVK1 PROJECT NUMBER: 3VY8 DATE: 15'May-08 PROJECT NAME: 10Oak Island DRAINAGE BASIN: umb REVIEWER - RECEIVING STREAM: CLASSi Index No.: |fORVV. is sit owithin the 575/AEC? G|TEAREA: F IMPERVIOUS AREA CALCULATION BUILDINGS PARKING/ASPHALT 0,98 CONCRETE OTHER Place a 1" here if Rational SOILS INFORMATION ELEVATION OF SEASONAL HIGH WATER TABLE ..... .. :5 FEET MSL REPORTED INFILTRATION RATE INCHES/HOUR or 0,001481 FPS SURFACE AREAS ELEVATIONS VOLUMES Elev. (ft) Area, sq ft Inc. Volume Acc. Volume TOP VOLUME DEPTH DRAWDOWN CALCULATION DESIGN STORM, INCHES DESIGN VOLUME 7319 CUBIC FEET TOTAL VOLUME AVAILABLE 22259 CUBIC FEET STORAGE MET AT ELEVATION 24.30 FMSL STORAGE ELEVATION ON PLANS 24.50 FWISL 25YEAR 24HOUR STORM N/A Intensity, i=.33inches /hour (]r= C i A= 0.46 CFO Qpthrough the bottom ofthe buuin= 6.38 CFB Must be>Or 1OYEAR 1DMIN HIGH INTENSITY EVENT Intensity, i=G,3inches /hour Volume for 10yr. 10min. event = 5241.10 CF < 22258 CF COMMENTS f •` l NC DENR - DIVISON OF WATER QUALITY .0310 LUMBER RIVER BASIN 2B .0300 Name of Stream Description Class Classification Date Index No. Indigo Branch (Indian From North Carolina -South C;Sw 12/01/63 15-23-4 Branch) Carolina State Line to Cawcaw Swamp Earnest Branch From source to Cawcaw Swamp C;Sw 12/01/63 15-23-5 Intracoastal Waterway From Cape Fear River Basin SA;HQW 12/01/63 15-25 • at Buoy FI R ev. 4 sec 22 to North Carolina -South Carolina State Line, including all sloughs, sounds, inlets and connecting channels Lockwoods Folly River From source to mouth of C;Sw 12/01/63 15-25-1-(1) Royal Oak Swamp Red Run From source to Lockwoods C;Sw 12/01/63 15-25-1-2 Folly River Boggy Branch From source to Red Run C;Sw 12/01/63 15-25-1-2-1 Pinch Gut Creek From source to Lockwoods C;Sw 12/01/63 15-25-1-3 Folly River Holden Creek From source to Lockwoods C;Sw 12/01/63 15-25-1-4 Folly River Ramshead Branch From source to Lockwoods C;Sw 12/01/63 15-25-1-5 Folly River River Swamp From source to Lockwoods C;Sw 12/01/63 15-25-1-6 Folly River Midway Branch From source to River Swamp C;Sw 12/01/63 15-25-1-6-1 Sarah Hole From source to River Swamp C;Sw 12/01/63 15-25-1-6-2 Rattlesnake Branch From source to River Swamp C;SW 12/01/63 15-25-1-6-3 Middle Swamp From source to River Swamp C;Sw 12/01/63 15-25-1-6-4 Bolivia Branch From source to Middle Swamp C;Sw 12/01/63 15-25-1-6-4-1 Half Hell Branch From source to Middle Swamp C;Sw 12/01/63 15-25-1-6-4-2 Clark Branch From source to Lockwoods C;Sw 12/01/63 15-25-1-7 Folly River Ford Branch From source to Lockwoods C;Sw 12/01/63 15-25-1-9 Folly River Nucitt Branch From Source t0 Lockwoods C;Sw 12/01/63 15-25-1-9 Folly River Scotts Branch From source to Lockwoods C;Sw 12/01/63 15-25-1-10 Folly River Lockwoods Folly River From mouth of Royal Oak SC;HgW 08/01/90 15-25-1,-(11) Swamp to Brunswick County SR 1200 Royal Oak Swamp From source to Lockwoods C;Sw 12/01/63 15-25-1-12 Folly River Little Royal Oak Swamp From source to Royal Oak C;Sw 12/01/63 15-25-1-12-1 Swamp Middle River From source to Royal Oak C;Sw 12/01/63 I5-25-1-12-2 Swamp