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Home My WebLink About20170219 Ver 1_40 0431 2015 SF-400431 REEDY FORK TRIB NO 1 SR 2719_20170221ADDITIONAL INFORMATION AND COMPUTATIONS DA = 2.20_ SQMI,_..___ REGION 1 _ RURAL_._ USGS_ RURAL ................•-------------------------------•-•----•-------------------------•-----•--•---...._..----••------- ..... .. .. .......... ... •------------•----•--- • --•--------- • ------------------•--------- •----------... -•-•--------•- • •-------------- NCDOT DISCHARGES: FEMA DISCHARGES: Q10 _ 650 CPS -----------•------------•------•-••-• ..........................•--.._.......__...-•--------------------------•----•----- Q25 = 850 CFS ..-----'-'-'-•---------------------•.._..---•----•-•---••------•---•-----------._._...........---•-•---•-•----------------•--•---• Q50 = 1100 CFS Q700 = 7200 CFS . Q100 = 1230 CFS ........•"•- ----------------•-------•---•----•--...-•-----..._._._...-'-- Q500 = 1700 CFS NATIVE MATERIAL CONSISTS OF MATERIAL THAT IS EXCAVATED FROM THE STREAM BED OR FLOODPLAIN AT THE PROJECT SITE DURING CULVERT CONSTRUCTION. ONLY MATERIAL THAT IS EXCAVATED FROM THE STREAM BED MAY BE USED TO LINE THE LOW FLOW CULVERT BARREL. RIP RAP MAY BE USED TO SUPPLEMENT THE NATIVE MATERIAL IN THE HIGH FLOW CULVERT BARREL. IF RIP RAP IS USED TO LINE THE HIGH FLOW CULVERT BARREL, NATIVE MATERIAL SHOULD BE PLACED ON TOP TO FILL VOIDS AND PROVIDE A FLAT SURFACE FOR ANIMAL PASSAGE. NATIVE MATERIAL IS SUBJECT TO APPROVAL BY THE ENGINEER AND MAY BE SUBJECT TO PERMIT CONDITIONS. """"'"'"'""""""""' ............. ..........""".......................... _............"""""'""""'""""""'"""""" ....................•----•--••---•-•-•--•-----•••----------...._...----••---•--•---••-•----------------•--------------•------•---• •-•-•------------•-------------•--------•-----•-------•-------•-•--•-----------••-----------•--------------•----------..__......_. .................•-•-•••-•--•----•-•---------•-••---•--...._..........--••--••---•--.._._.........._...-•----•---------...--••---• SITE DATA Drainage Area �_20 SQ_ML USGS QUAD /STREAM STATS ...................... Source ....__......-----------•-•---•--.._._.._._...----•-•---•-•----- River Basin CAPE FEAR /JORDAN LAKE RURAL (PIEDMONT) -•----------•• ---------•----------------- Character ......------•-•------------------------------•--------•--- Stream Classification (Such as Trout, High Quality Water, etc.) CLASS C •-•--•----•-----•-------••-----•---•-----•-------- Data on Existing Structure ..�@31' PRESTRESSED CONC. CHANNELS, END BENTS: PRESTRESSED CONC. CAP ........................•---•------------• --- •------•--• ---....... _......... ---.......... Total Waterway Opening..__ 204__.___s.f. Woterway Opening Below 100yr. WS EL.___.142______s.f. Debris Potential: Low ❑ Moderate � High ❑ Data on $tructures Up and Down Stream (UPSTREAM) 6 FOOT CMP UNDER SR2733 (DOWNSTREAM) 40-0188 • ..............................•----------•--------•----•--------._...------ 46lQG�.��.�.z!f1-- =--7�:Q:'; BRIQG�-W�DTK--=---?�-$--•-----••-•-• .................••----•-------------------------------- Gage Station No. _.__ w?� ............. Period of Records rYA--------•--•------•---•----------- yrs. ----'----• -•-••--- Max. Discharge..--wp--•• ................c.f.s Date....W?�•--------....-----... Frequency....w:4............. Historical Flood Information: Date NEVER OT 679.3__ 100__ Period of _ Elev.._.__._ .H.Est. Freq. ___ _ yr. Source ..PAULINE.COOK_ (RESIDENTZ___..__Knowledge__59__.yrs. Period of Date---•._.._._. Elev.._.......St.Est.Freq.--•----Yr. Source •-----------•-------...-.•-•--...---••---Knowledge------•Yrs. MAINTAIN OR IMPROVE Allowable HW Elev.. EXISTING LOS25YR WSEL ___ __ _.�{, Normal Water Surface Elev. 670.3' ---••---------------- ------•--.ft. FEMA EFFECTIVE Manning's n: Left 0.6. _01� ____._ Channel 0 047___ Right O.B. �>?.._. Obtained From _MODEL LIMITED: DATE 3/I6D9 Non-Encroachment YES Flood Study/Status ________________ __..._._...._ Established? ,._ ---•---------------------•---•------ ---------•- Flood Siud 100 r. Dischar e__ 1230 W�th 680.14_ W�thout y Y g ___c.f.s.; WS Elev.: Non-Encroachment__.._ ..fF.Non-encroachment680.12}t, @ River Station 76808 in Effective Model DESIGN DATA '= From Duplicate Effective FEMA Q itJSGS HydrologicalMethod .--------•----•---•-•---------------------------------------•---------•---------•-------•---------•------- HEC RAS VERSION 4.1.0 (ReedyForkTriblADJ.prj) HydraulicDesign Method ..--•--•-•------------•--------• ..........................................................•-------- Desi9n Tailwater � Q-- --7.2* }t.: Q 7.7* }t.: Q 8.3* }�.:Q 8.5* }t . Q 9.3* --}t. " = CULVERT OUTLET '" " "� '"" FEMA '"" Inlet Control Outlet Control Q dc+D h Remarks Size & Type (c.f.s.) Ke HWiD (ft'� dc 2 o H �So (ft.) 2@71'X10' RCBC SEE HE RAS ODEL Is a Floodway Revision Required2__._._MOA TYPE 2b_._... TotalProposed Waterway Opening____..�$? ._.. .... ------- Outlet Velocity (V�a) ___.__ 4 4__________________f.p.s. Natural Channel Velocity (V�a) 4.3** .........-• ................. CLASS I RIP RAP W/GEOTEXTILE —_AVERAGE BETWEEN CROSS-SECTIONS 16205 AND 76124 Required Outlet Protection _..-•--•---•-•------------------•--••-- - --------•-----•••--._..........._..------•--..... Design: Discharge -•---850----- c.f.s. Frequency...---...- 25........yr. Elev. 677.1 -----•--. ft. Base Flood: Discharge ____ �230 __.. c.f.s. Frequency......... �00 678.27 •--•-- Yr. Elev. -----------------•-----•---ft. Overtopping: Discharge .... 2700..,, c.f.s. Frequency,___..._ 500+ 682.3 ------ Yc Elev. . ..................."'.....ft. @ SAG STA. 13 + 65 CULVERT SURVEY & HYDRAULIC DESIGN REPORT � N. C. DEPARTMENT OF TRANSPORTATION ��qC � : DIVISION OF HIGHWAYS m � HYDRAUUCS UNIT � ; RAIEIGH, N. C. Y � " ' 400437 pro'ect No. _17BP.7.R:87 13+12 -L- r t I.D. No....--`--._.. I -----•-•--•--•-••- Proj. Sfation Q................................ 'W�' � County GUILFORD REEDY FORK TRIBUTARY NO 1 431 � . _....-•----^--•----------- Stream _.._.._...--•-------•-•-• .......................•---•-•--.. Stru. No._........... � � SR 2779 NC 67 SR 2705 ; On Highway.....---•--------------------- Between ..__.................... and ......................................-- o � � � Recommended Structure .�_ @_ 11'X70' RCBC WITH 1' AND 2' SILLS WITH BEVELED INLET N-"•-•-------------••------•---'----•-•'-----.._..----^--^----••------- � �� oQ� ......................................•------•-•-------------------•---------------------••---•------••-----••---------•-•--•----- N a: 34' SHPT-SHPT (10' LANES 7' SHOULDERS) 82" M �. Recommended Width of Roadway ......................•---------•-�-•--------•-----.... Skew ---------•-----•---•--•---• � N� � N� Recommended Location is ({�Fp; At $ewnj Stream from Existing Crossing...e ................................... � LL$tatewide Tier ❑ Regional Tier ❑ Sub-Regional Tier � � Bench Mark is .BM#7_ 60D NAIL IN BASE OF 14" POPLAR L STA. 12+46.40 95' RT . --'•--••-•-•---•-•-• .................................•--'-•'---•--._..._.._._....._._......__... ' Elev..b77.64 NAVD $8 i.: ----•----------------------------•---•--------..._....----.._..._..._ .._..ft. Datum:__...._...._...._.... d; NOT REQUIRED. OFF-SITE DETOUR ^� Temporary Crossing ---ee__ee.e°e_ee.---•-----•-----•--.....---•--...--••-------------•--.......--•-••--••----..._._.....__.. m: �� 3 Y rW� F A �. � � � �� ' y, '� �,�` ' , z 4 , ' . F �''`^�, Ti � � e -�J � " r� ?r�%` , v g, , � � F ..;1', r r. " HC , ; t « �" � = . , , .' P'"' 4 P�.,,.. " ' �r 1 ; / . u��r,�. ��'��„ w ..j5� � / " a M� � <• k k o � '� �w�i . j O: ' r °l�" � �,^t`"a'''�".•,yky., x 'i� •N � - _. �: � �� t,' I i t 0 Z ,,4„ t �.. ��' , .. .. �� . . � .�I r �� 4c ,�. � � � . . . R; �5rt� y.� 5 � � �h .@ 'y+ll.^` .��Y� . 'mF . e P y.IM1 ' ��' �'t t�+�. r.;� .+., � ::� � �� 4. o � �;�;;' k,* *, u .,. , - . . .0._. � - C � . &��-� J . .. �' � � � � � �r � ..b' . W.,x:.. � � .�� . . .�. , . � � � �� . . '1�" , :.' r N � ___._.�� _�. _. . .. .._ [4vx .,.. ::. _.� O� � Z� 1AMES A. CROUSE, PE 0 �� Designed by: -------•-•---------------------------------•------ } �; DAN DUFFIELD, PE Date ___________________ >. Assisted by: •------•----------------•----------------•-------' � �: . DAN D FFIELD, PE � �� Projecf Engineer . __, .._.... . .� - � Reviewed by: ---•-U�--�--- -- ------1-�� -"'--•-• �