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Home My WebLink About20170220 Ver 1_400379 2016 SF-400379 REEDY FORK TRIB NO 4 SR 2715_20170221ADDITIONAL INFORMATION AND COMAPUTATIONS -- D-�---- 1.85 SQ.MI. -•----•--------------REGION- � ----•----------------•----•----- RURAL -------•---...... -------•-------••----------•--- ._ USGS RURAL ------------ - --- - ---------------------•---•--• •---. _.._......._................... • •---•---• •--• •--•--................... ------• • ........ .... .....................• •-----------•-----------------•--•--------•---- ----------•---................ _... _... _.. NCDOT DISCHARGES: FEMA DISCHARGES: Q70 = 600 CFS Q25 = S00 CFS Q50 = 1000 CFS Q100 = 1100 CFS Q700 = 1113 CFS Q500 = 7500 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 BARREI_ 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 SUIBJECT TO APPROVAL BY THE ENGINEER AND MAY BE SUBJECT TO PERMIT CONDITIONS. ............... .... . . .................. . ............... . . � ....�.. . . . . . .� ..........................��... . .. . .......... ......... ......i ...... . ...�.................. .. ........ ........ . . . . i .................................... ---------••-----•• .............................••--•••--•--................... ----•----------------••----•----•-•-•-•--•----------•-----------•-------•---- SITE DATA 1.85 SQ.MI. USGS QUAD /STREAM STATS Drainage Area ---------•---------------------------- Source ._........_..------•------•------------------------•-------•-•- River Basin CAPE FEAR /JORDAN LAKE RURAL (PIEDMONT) ----•-------•----------------------------- Character .---------•-----------------------------------•-•-----•--- Stream Classification ($uch as Trout, High Quality Water, etc.) WS-V; NSW -------------------•---.._......._................ Data on Existing Structure 2�° 17'8" TIMBER DECK ON TIMBER JOIST. END BENTS: TIMBER CAPS .....--• • ........... .........•----------------------•-------•-----------.. _................--• • • - Total Waterway Opening.... 212.......s.f. Woterway Opening Below 100yr. WS EL.....��?......S.f. Debris Potential: LowO Moderate� High❑ (UPSTREAM) 40-0187 Data on Structures Up and Down Stream SINGLE 7'X20'7" REINFORCED CONCRETE BOTTOMLESS CULVERT ----•------------------------------------------•-----......_........ NO DOWNSTREAM STRUCTURE - REEDY FORK Gage Station No. ----N!?----------------------- Period of Records WA•---•-------•---•---•-------------• Yrs Max. Discharge ---- W"A-------------------- c.fs Date ----wp-----•-------•---•--- Frequency•--- wp-----------•- Historical Flood Information: Date_.2013._._ OVERTOP �p . Period of Elev._._ ___}t.Est. Freq. _.. yr. Source LARRY TUCKER �RESIDEN� _ Knowledge__53___yrs. ....................... FREQUENT BACKWATER FROM REEDY FORK Period of Date............ Elev....._.__..it.Est. Frey.........yr. Source .........................................Knowled9?_..._..yrs. MAINTAIN OR IMPROVE Allowable HW Elev.._ EXISTING LOS25YR WSEL __.... j{ Normal Water Surface Elev. .__.__604_4' � FEMA EFFECTIVE Manning's n: �efr O.B. __ �_�?_____ Channel _ 0:05___ Right O.B. . �:�5 __ Obtained From MODEL LIMITED: DATE 3iI6D9 Non-Encroachment YES Flood Study /Status _________________________________ ______ Established? ----------•----------- •-••-•----•--- With Without Flood Study 100 yr. Discharge __>>>3 ___�.f.s.; W$ Elev.: Non-Encroachment 615:82_ jt Non-encroachment615,07}} @ River Station 2264 in Effective Model DESIGI� DATA '= From Duplicate Effective FEMA Q /USGS HydrologicalMethod .....--••--••--------------••--•---••--......._.......-----...._._..........._...---•---••--••--••--••--• HEC-RAS VERSION 4.1.0 (ReedyForkTrib4ADJ.prj) Hydraulic Design Method .............•-•••-•-•--.................-•--•-------•------..._._...__.............--••--•---••--• Design Tailwater � Q... ..8.6: tt.; Q_� ..9 4:_..ft.; Q._._ ��:��..Jt.;Q.,,,. _?0.4'._Jt.; Q�,.,, --��=6-•---....R * = CULVERT OUTLET'� ` '� �� FEMA '"" �nlet Conirol OuTIeT Control (� Remarks Size & Type (c.f.s.) Ke HWiD �{W' dt d� z � ho H LSo �ft �' 3@ll'X8' RCBC SEE HE RAS ODEL Is a Floodway Revision Required?...... MOA NPE 2d Total Proposed Waterway Opening......?��....... .... ............ Outlet Velocity (V�o) ._____? ��`_________________f.ps. Natural Channel Velocity (V�p) 2.6** ------•---------�---._....._ Required Outlet Protection CLASS : I' RIP RAP W/GEOTEXTILE - AVERAGE BETWEEN CROSS-SECTIONS 1749 AND 1852 � Design: Discharge ............... c.f.s. Frequency.----•------5-------.yr. Elev. •-------•---13.0-----.---. ft Base Flood: Discharge _.._.1713 �,f.s. Frequency..________�00 Y 614.12 _� ..... --•----- r Elev- ------------------ Overtopping: Discharge _____880_____ c.f.s. Frequency._._.....�5+ 613.3 .......yc Elev. ..._..----•----------------� STRUCTURE IS IN BACKWATER FROM REEDY CREEK @ SAG STA.13+66 � CULVERT SURVEY & HYDRAULIC DESIGN REPORT �� N. C. DEPARTMENT OF TRANSPORTATION m ; DIVISION OF HIGHWAYS � ; HYDRAULICS UNIT Y ; RALEIGH, N. C. � 0 LL > : 400379 176P.7.R.87 13+15 -L- o ; I.D. No ...............•---•- Praiect No. •-----------•-•-------........... Proj. Station ..-•---..............---........ W �� County . GUILFORD REEDY FORK TRIBUTARY NO 4 379 � --------•----_ Stream •-------•-------•-------------•-••------------•-----------. Stru. No.------------ rn o�� On Highway__ SR 2715 SR 2776 SR 2705 ----------•------- Between •-------•-------•------- and ----------------•----------------------- LL�: 3@ 11' X 8' RCBC WITH 1' AND 1.5' SILLS WBEVELS �n �n1 Recommended Structure -----------------------•--------•-•------------•--••--•-----•----�-•--•-----------•-------•------- '° N; NO GUARDRAIL o� -----•-------•-----------------------------••-------•------------•-----------•---•-------.......•--------•---------------•-------- N`"� 26' SHPT-SHPT 10' LANES, 3' SHOULDERS 70° n vj Recommended Width of Roadlway......--••-----••---�----------------------------�--... Skew -----------------------.... M � � Z; Recommended Location is EHp At Sewnj Stream from Existing Crossing......_________________________________ d LL Statewide Tier ❑ Regional Tier ❑ Sub-Regional Tier � o - BM#7: 60D NAIL IN 12" MAPLE L STA. 12+50.78 127J8' LT d Bench Mark �s .............................................•---•-•----------•---••------..........................-•---•----• : 610.63 NAVD 88 i.: ----•-----------•-----------------•-•-----------------••----------•-- Elev. ------•-•------ft. Datum: _.._.._-•----•------- d� NOT REQUIRED. OFF-SITE DETOUR ^� Temporary Crossing --•-----•---•--------•--------••------------------------------------------•----•----•-------------------• m; �. 0 z m � �a Mc Oa O, �e 0 Z � rna �^ oe � � i G U J N v� � O� � Q� r �; � m� w a; � f-� N � � � ��z .-•� , � �`��,,. f; � .�,r � �,:-�JY�„ � � +�ap �.M ,"� � �� .� �F� � N�„.; � � �� 4. � �� .� �_� � — r � WJI� Desi ned b DAN DUFFIELD, PE 9 Y� --------•-------------------------•----•----- Assisted by: �'v`'�ES A. CROUSE, PE Pro'ect En ineer : DAN DUFFIELD PE I9 ------------------------••-------•---- Reviewed by: -��""""'!"`"""'-�-=-�--••---- � 'L,..' •��w�._ .� �"C�'a`�4._ .J � t ��,1«riCA�;��rrr�' � ^`��^��e� �.�s iqy� ��i�� :� !'.9 > Date --------•-------•-- � � SEAL i � �Su� �'�' ` 030405 � ots�cx�yo�xc�niu�vasuv:c�s � Q�� `v. � �;� �0��,�_ 700 E. Six Porks Road �✓ ' C�—%-"�� ,�—� Sulte 300 I I CHic'eh9 9322�1�15 ```✓',1(((��1vF„1 V)�3.�•� o �'