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C. -------------------------------------------------------------------------------- -- --- 0.661 0.5]2 U5= 78.9 (DA) (IA) = 1,095 CFS (1100 CFS) G2100 = 2,226 CFS (USED) : Debris Potential: Low______Moderate_.. X____High________ oYet ---------------- ---------- ------------------- ' 0655 0515 : V: SF rJ0�2 U�= 122 (DA) (IA) 1,474 CFS (1,400 CFS) � Data on Structures U and Down Stream UPSTREAM CSPA 9_3'Xb_3 ; NOT IN INVENTORY_ SR 2411 Z; I.D. No...______� _____9_____ Project No_ _________________________________ Proj. Station ___._________________________.___ -- ------------------------------------------------------- ----- - -• ----------------------------------- ' P --------- i B 14+62 5 a.en oase : SANDY C 129 - U� ---228-(DA)---(IA)---- ---1,837 CFS (1,800 CFS)--------------------------- 7 DOWNSTREAM CONFLUENCE OF SANDY CREEK TRIB_3 AND SANDY CREEK -------- ----------------------------- ,a,�: County --------------------•------- Stream-----------------------REEK-------------------------------Stru. No.----_ .--- _ _ � RANDOLPH TR BUT ----- --------------------------------- � -- ---------------------------------------------------- ' �' 0.603 0.396 ; � �� SR 2407 SR 2441 U= 296 (DA) (IA) = 2,159 CFS (2,200 CFS) : WA Period of Records wp , ^. On HighwaySR_2407_jSTARMOUNT RD) Between _______________________ and ________.________...______________._____ ---50--------------------- -------------------------------------------------------------------------------------------------- � Gage Station No.-------------------------------- ------------------------------------------- Yrs. , 0.593 0.358 � ' � • ; , m, EL @ 10'XS' CAST-IN-PLACE RCBC BOX CULVERT WITH TOP BEVEL U= 374 (DA) (IA) = 2,489 CFS (2,500 CFS) , WA WA WA ; , Recommended Structure 3 BARR ---�on----------------------------------------------------------------------------------------------------------------------------- � Max. Discharge----------------------------- c.fs Date------------------------------ Frequenc -------------------------------------------------------------------------------------------------- Y --------- �, NOTE: 10% IMPERVIOUS AREA USED TO OBTAIN VALUES NOTES--------------------------- -------------------------------------------------------------------------- - ---- R 2 14 0 DISCHARGES USED FOR NCDOT MODELS EXCEPT FOR 100 FEMA . USGS UBRAN REGRESSION 51 0 503 , Q ( ) DESIGN FOLLOWS SUBREGIONAL TIER GUIDELINES. THIS PROJECT COMPLIES WITH LOCAL FLOOD PLAIN MANAGEMENT REGULATIONS. NO STRUCTURES WILL BE ADVERSELY IMPACTED BY THIS PROJECT. DESIGN IMPROVES EXISTING LEVEL OF SERVICE. """"""""'"""""""'"""""'""""""""'""' _"'""""'"""""'""""""'""'""""'"'"""""'"""'"""'"""'"'""'""""""' """"""'"". _. _. Historical Flood Information: Period of Date_____________ EIev.BRIDGE HAS NOT OVERTOPPED Source __ ��ES STEELE,LOCAL RESIDENT Knowledge__ 12___yrs. --- - Period of Date------------ Elev.--------- ft.Est. Freq. --------yr. Source --------- --------- -------------------Knowledge-------Yrs. Allowable HW Elev...___ �WTAIN OR IMPROVE LOS {t. Normal Water Surface Elev. ___575_07 {} Manning's n: Left O.B. ___ �_13____ Channel __ 0.05 RighT O.B. __�•13._ Obtained From ______HEC _RAS - - ---- Flood Study /Status ___ Non-Encroachment LIMITED DETAIL STUDY( DFIRM 8717_ OLOZD8) Established2 YES --------------------- With Without 584 61 Flood $tudy 100 yr. Discharge __�,400 r.f.s.; W$ Elev.: Non-Encroachment 584.99 _fF.Non-encroachment_....:__.fr @River Station 2500 DESIGN DATA Hydrological Method,. USGS UBRAN REGRESSION SIR 2014 5030 Hydraulic Design Method __..HEC-RAS_V_4.1,Oi750129 SandyCreekTrib3_SR2407.prj_____________ Design Tailwater � Q -----�=5----ft.; Q __8_� R.; Q_ 86-----fi'%Q -- 9.0 .fi.; Q ----9=9--------ft. to ' 2s ----- so ioo -�' soo • �� �I������ _■-_I--.■-_— --_-I__----� � � �• ■ ► ��► ►1 • � i��� _�-_�-_��-_— _■-_I--.■-_— Is a Floodway Revision Required?_____________MOA TYPE 2a : OutletVelocity (V�o) _.___ _ b'$_____.._______f.ps. Natural Channel Velocity (V�p) ._____._____�:�.._. _...__.f.p.s. ; Required Outlet Protection _._____.._ CLASS 'll' RIP RAP INFORMATION TO BE SHOWN ON PLANS S E ev. Ta en @ River Station 2205. Design: Discharge ___ 1,SQQ_____ c.f.s. Frequency _________ ��_______._yr. Elev. 583.3 {� Base Flood: Dischar e____�,500 �.f.s. Fre uenc 100 r Elev. 585.37 ft g ---- q y --------------- y ' ------------------------ Overtopping: Discharge --- 1,900----- c.f.s. Frequency ---------- 10+------ Yc Elev. 5S4J -•-------- ft ----------------- I o; BURIED 1' WITH 1' SILLS IN L�W FLOW BARRELS AND 2' SILL N FLOODPLAIN BARREL N' ""'"""""""'"'"""'"..."'"""'"""'"""""""""'"""""'___"'"""""""""""'""""""""'"""'""""'"'""'____'""""""'"""""'""""""""""""""'"""' �; �; Recommended Width of Roadway_...34 FT_SHOULDER PT. TO SHOULDER PT. Skew _________�O5 DEG. - - ---------------------------------- --------•-- �^; Recommended Location is (Up,�t Down) Stream from Existing Crossing________________________________________ � LL Statewide Tier ❑ Regional Tier ❑ Sub-Regional Tier � �• BM#1 BL STATION 9+16.00 82 RT; SPIKE IN 40" GUM BenchMark is -------------------------------------------------------------------------------------------------------------- ,,� ; Elev. ____581.60 ft Datum: ___ NAVD 88 ------------------------------------ -- ---------------------------- ,o ; - --- ------- �' NOT REQUIRED; OFFSITE DETOUR AVAILABLE m ; Temporary Crossing ------------------------------------------- ; � p �`�-.�,�s,,,,,a �` - � � ' � � \ � '�-; � � t � c , , z �, � �, -�� , �� , ;, � a �' , �� � i � ' �' . �'v'�, v ;� � ` , r � � •o i �� ` e� . � �� f �v, � I t { " i,;, N; � � �W �. '� 1 ��^ � r�..a R � "� � fi �^:, o� I� z j �: _ " LL: �. II . . � . . _ _. . ' a ..�, � N,�i nArw a� t�w�+��x .�1 !!"fjj�!,,.� Q � � 1��.�1� �.�i.��,,.� � � `-:._...l��r.�. �� � 1 ' �- a �� . .'�. �"jiy7M � + .� �° �''� t ;,''�' ��y�y��.y�yy P� v f�+� � - .�'a'� � . . . N� � a �16� � o: .. a�.�.�. ��. � ��E,�.: �� �, • , ��'4� � z� ��1 �o ���,:�� � � � > �, C �F { ,?a, .#� . � � � � � �r _ � �, ���� ;I � N. cy__.�. . .. . � ... ... . . ... _. _ _�•. " ��� � :. � � . � � ,���11��r/qj, •. ra, ,•'O�` �i C A R ��ii . ' SEPI ENGINEERING & CONSTRUCTION INC. � `� � ••"""' -�� ��� � Designed by: -----------•--------------------------------------- -------- ::,���OFESS/���9���i; V ERICA BRUIMGTON, EI Date ��Olb ,� :� y: � o Assisted by: -----•-••••••••------------------------------------ REV. 9/72016 � ;=�,:4 SEAL �:W?; z ELIZABETH G. DINATALE, PE '= �° 40266 :�_. •.�: . .. �6 Project Engineer : .""----------'---------------------------- � / •,' �9; `c'vG EF'� �P.��'. � , ' SEPI Engineering & Consfruction, Ina � � • I N : � a� • ♦ . • � � : F • ' \ ♦. �. 1p•. a ', i pp ♦ . .... • Reviewed by: __ ___ __________ 7025 Wade aoeoue , Q p. - -- ---- - •-•-•••••-•--l"�`^-- � "' �/�Z.IIU Raleigh, NC 27605 00��5��/ uP'0��... in 919-789-9977 �"'"�_�� Lic. No.: c-2197 �""a""""�: ���� 9/7/2016