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20180871 Ver 1_Hydro Report_20180622
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AJt�3(l�'33�� .Sh ,%_�: 8A-QOl �� T�- - i�: , _ �� .1.,� q ' • . : 319H1 3JNHWa�db�d .� � � ,, ,,. _� i,�� �C0 �i - El V1S � �'-, �NI1SiX3 : , : : : . , . . : , . . . , : : : ' +t �1 I �--I � � � _�-� c� .. .. 4i n�i, d�` �� i �r- i t + - D h � �r- ; ' ` lOO�N _ il ! „�d i� { ._ �� �..7� i�u�=� X09 'n'dlhll'v�'fll , � ,� , , I { ' 1 , r . t t � . 1 � � �I ! � � f . � j� I `i : ' �� � N N {J �la ,00� �ia ,os .a �ii ,os �li ,00� ' �, , a � o � 0 o d ADDITIONAL INFC�RM�ATI(JN AND C�ClMIPUTATIONS USGS SIR 2409-5158 (REGION 2 BLUE RIDGEJ DRAINAGE AREA = �.b2 SQ. MI. SAY ;,.iao n.r:n, Q��- 2$$ (DA� - 288 {9_G2j = 410 cfs UJld O iP� Q?$- 348 (DA) = 398 (LG2J = 550 cfs G::�o ..::E q;o- a�v QDAj .- 474 di.6z�., _ �oo �S O.J13 e:y Q,�J- 575 (DAJ - 575 {l.b2j = 80Q cfs THIS PROJECT COMPL4E5 WITH LOCAL FLOODPIAIN MANAGEMENT REGUL/kTICJNS. N� STRUCTURES WILi. BE ADVERSELY AFFEGTED BY THE WSEL'S FROM THE PROJECT NATiVE MATERIAL COPFSISTS OF MATERIAL THAT IS EXCAVATED FROM THE STREAM BED AT THE PitO.IECT SITE DURING CULVERT CONSTRUCTION. NATIVE MpTERIAL IS SUBJECT TO APPROVAL BY THE ENGINEER AI�ED MAY BE SUBJECT TCi PERMI'f CONf]IT10N5. HEC-RAS ALUMINUM BOX CULVERT EFFECTIVE AREA CdMPUiATIONS ACTUAL CULVERT AREA QF 22'1"x6'6" ftBC fROM CHART = 118_4 5�. Ff. RISE5PEIN RATI0-0.29 USE CHART 1B FiDS-5, SU� HEADWALL USE SCALE #1 EPFECTIVE AREA=ACTUAL CULYERT AREA - BLfJCKAGE AkEA EFFECTIVE AREA=718.4-24.1 SQ_ FT. j;BLQCKhGE AREA (22'xl'p i(7`x0.5'g <24.1 S4. �.J = 89.3 SQ. FT. EQUIVALENT BOX 5IZE IN HEC-RAS (1' BURIEO}=89.'✓5.18= 17.2 FT. EXISTWG BRIDGE WATERWAY OPENING BS 84.0 SQ. Ff. HI5TORICAL FLOOp DATA TO BE SCI6MITfEp Ai A IAiER DATE 51TE DATA Druinaye Area 1.62 SQ MI. Source DELINEATED USGS S7REAMSTATS & LiDAR DATA River Bosin FRENCH BROAD Ghorader RURAL Siream Classification (Such as Trout, High Qualify Wuter, etc.J C; Tr; HQW Uata on Existing Structure 1 SPAN �a. 2U'-6"; TIMBER FLOOR ON TIMBER JOISTS; EBTS: TIMBER CAPS TIMBER POSTS & SILLS Cg: YAR. CENTER5 HEIGHT CROWN TO BED - 6 Ff. De6ris PafeniiaL Low X Moderote Nigh Data on STructures Up and Down Streom U5: NONE fYS= PRIVATE SRIDGE 1 SPAN v-il 78' WOOUEN SLAB CONCRETE WALlS HEIGHT BED TO CROWN - 7 FT. Goge Stotion No. �A Period of R�tords IWA yrs. Mox. Discharge �'� c_f.s Dafe 1`i/R Frequency H'A Historical Flood Cn#ormation: Period of Daie ���v, f�.Est. Freq. yr. Source Knov�9edge yrs. Period of Oate Elev. H, Est. Freq. yr. Source Knowledge y�$, Allowable HW Elev. 2405.8' (SHOULQER P7, - 1.Sj $, Normal Water Surface Elev. 2398.7 ft, Nlanning's n: Leh O.B. U.14 Channel 0-045 Right O-B. 0.10 Obtained FromFIELD dBSERVATION Flood StudylStatus WA Floodway EstabEished? �''A With Without Ffood Study 100 yc Discharge N�A cf_s.; W$ Elev.: Floodwoy �'A N. Floodvroy �'i'A ft. �a River Station WA DESIGN DATA HydroVogical Me4hod USGS SIR 2009-5158 jREGIt]N 2 BLUE RIDGE) Hydraulic Design Method M�GRAS VER. 4.1 PR�J. NAME SF870137 9RADLEY CREEK SR 1707 Design Tailwater � Q a WA ft.; Qz� hUA fr.: (�,� �A ft.;Q�o� WA ft.; Q� �'+4 ft. Inlet Conhol Ov11et Contral Q H.W. �� dc- D H.W. �temarks Siz� & Type icfs.I Kc HW�O (fr.} dc 2 ha H LSo [h.Y .. SEE FiEC-RAS M(JDEL �! � Is a Ploodway Revosion Required? Nd Outlet Welocity (�+�s) 6.4 f_ps. Natural Channel Velocity (V��) 5•4 f.ps. Required Outlet Proteciion RlPRAP ON BANKS INFORMATION TO BE SHOWN ON PLANS WS EL. Taken �� River Stotion 175 Qesign: Discharge �5� c.fs. Frequency 25 yr. Elev. 2403_4 {�, 8ose Flood: Dischorge $�� cf_s. Frequency ��� yr. Elev. 2405.29 {�, Overtopping: Discharge 930 c.f.s. Frequency 100+ yr, Elev. Z4Q6•8 ft. ° �r� a CULVERT SURVEY & HYDRAULIC DESIGN REPORT � �� N. C. DEPARTMENT OF TRANSPORTATION W DlViSION OF HI�GHWAYS '+' HY�RAULICS UNIT } RALEIGH, N. C. w � a m I.D_ No_ 5F-870737 Project No_ 776P.14.R.122 Proj. Station -L- Sta. 73+74.00 i c��s County TRANSYLVANIA Siream BR�4DLEY CREEK Si��. �o. 137 i o, m On Highway SR 1107 Behveen SR 7705 and US 2T6 i `"i Recommended 5tructure 7z -� x 6'-6" ALUMINUM BOX CULVERT (BURIED 1'} W/HEADWALLS _ a 0 N � � ftecommended Widih of Roadwny 32'-0" SHOUIUER PT. TO SHOULDER PT. 5kew 4�� o , � Recommended Lomtoon is (� nr e�) Stream from Exisling trossi�g. AT EXISTING LOCATI4N m �+. Sfatewide Tier Regional Tier Sub-Regionol Tier X a Bench Mark is BMr�I - NAIL IN BASE OF 15" PIN� 25.11` RT. I N -BL- STA. 13+55.20 OFF 32.73' Elev. 2412.50' (t, Datum: NAVD 1988 � Temporory Crossing dN-SITE DETOUR I o: m � Z � .�,. . �,y. *p�:t� ''r. .`% �i'.�� ' F%,��� - �C•=; � ' r�. ''�i�a. ' . %f .�1, o :�� � ; a y � . _ � � �� , � .:. � ' . = . � - , a � ° "`_ . a''.''. � ::�b o �• � .,�- r�' ' ...V� „ -- :�.',-. n :'g� ._,s �` � ` �.,. _ ' �,.. °° � �r - - .. y ' x �, �. � '''4 y . � Y � � � � � a r z ,�' "� r� � ,� '�k-, , . � � - � ' �.�t _ � r� '? �k�g��:t. ' i ' � ^ , "y �6P"�' �•, `� F _ ' . _ , . �, � '•��.�.,-_ _. , Z ' � ��`W*--� ��.. < ',i;.� � � ° �. :. `,, : �.' f � �� � ,.� b `� � �y{ �-; � L .:- ` i �~i��P_" hµM`r �- �� , i� .. .��t�t . N l 1 jY�/ �JL,' I in .Zcs�+.._. " - - �' Kc. c:i _ Y W � �����5�1' CA'RO����i� ♦ � ..... 1/ i } Designed by_ RG :���' �55/��' y9��. I J DoTe 05�U�14 : ;,�oe�� O,q�9� � � O Assisted by: �BS _ _ �,/", : $EAL ) � " � �f7�3fY97�(r ��� m Projed Eng�neer : RG .. ��� •. _�f..� f '. t°g'••`�h'G � , i�`���� �.. v Reviewed by: RL6, W1W .�'%' �'r""� �� � ,++r,� �� �u�F �Q��+,`, � in p�' � ��' ��� i�