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I_ _ I _ I ' I ' i I _ � - -T _ -- -- ' • � '- �1 -- - - -- -- -- -- -- - -- -- -- -- - -- � , : 9 = X � -J— - --'�- _. � i i i I i � i i i i I I I I '• I � /= i I I �I i li I I I I I I I I I I I I ' . { � �' _ _ - - . ,9r6oa'z = �3 _i i � ' i ' i _-�- � �_ � � I : ioodi��r+� ��rr+� I II f.'' c�� '��I - - -- -- _ ---_ __ �., _ � oo'�s+�t = �d � � � � , ' _ i-- i i �c �� .og I � i: �% r�- -- ., � r.00 £�+� _ ioo I i - -- - - -- - -- -.. -- -i �_ -�-, . :-. i _ � _ : , - - ; ' - - -�-- � - -- - _- ' : + . I ._� ��" � ��-- �� I i � � i i � i i � -� i ----�- --- -' I I �I I i I� I : I, I� I � � � �:� i— � I I I� I I I I � �� ---i �' �- � --� I � �-� -I-�I i � I i_ . I . i _ i � �Li _ I -- - - - - --- -- - - - - - ,__ I � ' —�-- I i i i i i i i i i i i i I 3Jalb8 d0 3Jb'd Sfl W ad 'ld OLL -. _ _ I -� I I-_- __ _ � . .I�� I . . I I= _ I II = _ -- - -- - - -- - -- - -- � �_ I IL ossz NOIlJ3S� --� y� . A�9_ � x I I ! /� /r 6_I , I I i li � ll JN - � �i- £'Z861 43SOd021d - - - III I _ �� /I I i I �I ---� ! - �`� .6L'6�0'Z �_73 � i I_ _ 6��Z�' '� i -- - - -- -- 00'Ob+OZ - Id -I - � 00'Sl 6I J�, - i I � i i i � i i i i i i i _ _ __ __ _ _ _ _ - -- -- _ _ I I I • �L J _ _ __ __ __ _ _ __ _ -- - -- __ __ _ _ _ __ -- -- -- - __ —L _ _. _._ _._� I I 0 Z86L \JNIlSIX3 _` 1\ � 1 a I 1 __I I I ._�._ � i ! ! I / I I I _ _ _ ___ ___ ___ _ _ _ _ __ ___ _ _ ___ _ _ --- --- -- --- - - - - --- --- --- - - --- --- -- i I- � _. — _._. _._, i _I _I _. I __ � �i L'0861 1V21fllb'N ---�� I � I I--- - _ - - - - I ! I I ! � , � ' I I I I _ � _. � �--- • - i . _ _ OOS OOl ' OS ' 9l ' S i I . ` � � . i � I - ._ _ - _ _ - ._ _ _ _ _ - ._ _ _ I I --- _ _ _ _ - _ _ - - - - - -I _. . _ I I I � - - -- _ _-8'$'SL I� --- i I i I I I I I i I i I I I i I i i I I-.-: I I I. i lil dJN3f1D321� ---I-. .- I I-i- ` .-.- ._. � � _ _ _.-.__I I I. I _- _- - I �I � �� - I-- ._- _ - _- - I I I I i . � i 121 `JN /. �� I I-I I--- _ - _-- - - --- --- --_ _-_ - _ .--- --- --- --- ' = /N�'_ $ I I _ - _ - - -- - -- -- - -- I I I I I I _I_ I I _I_ I I _I_ I _,-I ! — 318b'1 3�N`dW210�213d \ I - � I-G- - 4H �� _-- --- -- --- - - --- --- ----�- �- - — — --. —�. i � 121 JN i !__ � � - --- --- --- -- ---- -- --- -- � - ------ --- -- --- ___ __,__: ' � i _:_, '-'._ _--'- -' ' i i ' ! ' ' ' � I lOa�N -- ---- --- = 3 ai�e did sb � � � � _ / _ __ � 1 , ._ __ � _ --- --- ___ _-_ _ _ _-- - --- --- _ _-- -- I ___ _ - ------- --- --- : i I � 6 � ' I I 1�3�11-I �I � 9l ,SI1� _ - --- --- --- __ , __ _------_. _---� I I i I � IIIIII I�II I I _ � � � _ �. _ INFORMATION TO BE SHOWN ON PLANS WS EL. Taken @ River Station 2380 Design: Discharge ........ . ... ....... . c.f.s. Frequency ... .. .. .. .. .. .. .... .yr. Base Flood : Discharge . . . . . . . . . . . . . . . . . . . . .c.f.s. Frequency . . . . . . . .100_ . _ . . , _ .yr. Overtopping: Discharge .....................c,f.s. Frequency ....................yr. ADDITIONAL INFORMATION AND COMPUTATIONS Elev . ........................ft. Elev . ........................ft. Elev . ........................ft. DA - 5.9.O..SQ. M1..........REGlQh1. 2 ........................................................................................... .US.G�S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Q. . . . .=.4.4.30.=. .440� . �FS . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . 5 . . Q. . . . .=.5�00.=.5�Of� . �FS . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . ,o . . Q. . . . .=.8940.=.890� . �FS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . so .. Q.....=.10500.=.110Q0..CF.S ..................................................................................................... ,00 .. Q.....=.14�00.=.1.4Q0U .�FS ..................................................................................................... 500 ..................................................................................................................................... SITE DATA DA@SELECT SITES & USGS QUAD (WHITTIER, Drainage Area ... . .... . . ... �9..SS�.1v11,.............. Source ...S.Y.LYA. NARTH,. GR.EENS. .CREEK,.S.Y.LYA. SQU.T.H).. . River Basin _ . _ . _ . _ . _ . .LI:iTLE. IENNESS.EE. . . . . . . . . . . Character . . . . .. . . . . . . . . . RURAL,.MQUNTAINS. . . . . . . . . . . . . . . . Stream Classification (Such as Trout, High Quality Water, etc.) ...... .. .. .. .... '�'.:.Tr. (2-.7.9-39)... .. .. .. ....... Data on F�cisting Structure .... ...... ]@.67.',.2C`�.62.5.',.1Q2.4.3:, ]�62..�'. REINF.ORGER ..CON�R�.T.E. pECK ... .. .. .. . .....................................................................................Total Waterway Opening ................s.f. Waterway Opening Below 100yr. WS EL . ................s.f. Debris Potential: Low ....... Moderate ........ High ...... Data on Structures Up and Down Stream ...................UPS.T.REAM:. S�R. J�8I,.4C.1.4x12..BCBC................... . . . . . . . . . . . RQWNS.T.REAM:. . . . .SR .15�8, .1.@5Q'. T.IMB�ER. .DE.CK . ON. . S.T.EEL. J-REAM . AND . .CONC. A�UTJv1ENTS. . . . . . . . . . . . ..................................................................................................................................... Design Control Elev . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .ft. Gage Station No . ................................... Period of Records ..............................................yrs. Max. Discharge .............................. c.f.s. Date ......................... Frequency ..................... Historical Flood Information: Period of Date......... Elev...........ft. Est. Freq. ........ r,Source .......................................... y Knowledge...........yrs. Period of Date ......... Elev..........:ft. Est. Freq. ........yr.Source .......................................... Knowledge...........yrs. Period of Date .. .... .. . Elev.. .. .. .....ft. Est. Freq. ..... .. .yr.Source . ...... .. .. .. .. .. ...... .. .. .. .. .. ...... .. . Knowledge .. ...... ...yrs. Historical Scour Info. : General . _ ..NONE... ft. Contraction . .. .NQNE.. . �• Local ....NQNE....ft. Channel Slope .. .. Q.00.47. .. .. �t Source .U.SGS. (S.Y.LYA. SQU.TH). Normal Water Surface Elev. .... ....1.47.1...4.. .... .. ft. Manning's n: Left O.B. ....0.07.....Channel ...0.045.. .. Right O.B. ....0.07..... Source .F.I�LR . RE�QNN ..&. .H.EG.-2. Flood Study /Status . . . , . . . DETAI.LED . STUDY. RERELIf>IEATED . .(.4.-14-].Q). . . . . . . . Floodway Established?. . . . . YES. . . . . . With Without Flood Study 100yr. Discharge . . .3.90,5 . . .c.f.s. WS Elev.: Floodway . . . .198.1_.f� . _ . .ft. Floodway . . . . .1.98�0.3. . . . .ft. @ River Station 2380 DESIGN DATA HydrologicalMethod ............................................................................................................ Hydraulic Design Method , , , , , , , , , , , , , , , , , , , , , ,H.EC. . RAS. .YER . .4..]. (6-59Q5. .SCQTTS. .C.REEK. .US. 23.). . . . . . . . . . . . . . . . . . . . . . Floods Evaluated: Freq. Q Elev. Backwater Bridge Opening Velocity (Yr.) (c.f.$) (ft.) (ft.) (f.p.s.) @ River Station 2380 ............... ................... ................. Waterway Opening Provided Below:Design W.S. Elev. ..........s.f.,l00yr W.S. Elev. ..........s.f.Total ..........s.f., Average Channel Velocity (Design) .... .9..4.. .. .. f.p.s. Average Overbank Velocity (Design) . .. .. .. .3.5.. .. .. .. .f.p.s. Computed Scour : General ..................ft. Contraction .................... �t. Local ....................... ft. Is a Floodway Revision Required? ........................................................................................ FEMA DETAILED STUDY (REDELINEATED) LITTLE TENNESSEE RIVER BASIN 2 OF 2 DETOUR � BRIDGE SURVEY & HYDRAULIC DESIGN REPORT � � N. C. DEPARTMENT OF TRANSPORTATION � DIVISION OF HIGHWAYS p HYDRAULICS UNIT N RALEIGH, N. C. � � m � I.D. No.......6-�405..... Project No . ............48.�3.7..1..]........... Proj. Station ........l�Z+l6..-LRE.T.-........ ? Count y.........JACKSQN........ Bridge Over .................S�QTfS..CREEK.......... Bridge Inv. No.............. a SR 1356 m On Highway........ US..23..BUS......... Between ...... N� . 2y.4.41..... and .......... (SAYANNAH . .f�R). . . . . . . . . . . � Recommended Structure .................4.80.'.QY�RALL.LENGTH..BRIRGE................................................. 0 N � ..................................................................................................................................... � d, $ Recommended Width of Roadway ....... ................................................. Skew ..........1.4�°......... � Recommended Location is ( Up, At Down) Stream from Existing Crossing :..... ......... ....... ................ � i.� ,� Longitude ......... .. ......... ........... Latitude .......... . .. . .. ........... 0 � ,_ Statewide Tier � Regional Tier ❑ Sub-Regional Tier ❑ �.'�, Bench Mark is .... .. .... .. ..BM...#. 5.:. NAII. .SET..IN.. BAS� .QF..T.RIPLE.. .W.ALN.UTy.STA. .1.9. +Q�.. .-L-, .53..7.'. LT. .. .... .. .. .. . a � Northing . . . . . , . .7.3.43:b2.4b84 . . . . . . . Easting . . , .bJb83.3.77.7. 8. . . . Elev. . . . .1.9.8.4..36. . . ft. Datum: . . . . . NA�/R . .$8. . . . . oTemporary Crossing .......................................................................................................... Z � � v � 'o L � � a � �x � r 0 Z > c U � L � N � � � LL.1 . \�`�1(11'1711/��•��', U ` �Df�o�Sigi7ed-by� O �/ � \ �� ``� 1 1 1 1 1 0/� � I r��ii N p Designed by: ...........1N..N.ENRY..Y�IELLS, JR,. P.E............ ;�4 � Sc�/. �� ; � = = ��'�� ' "�� : Assisted by: .. JUS.H.UA . G..DALT.ON,.JAS.O.N. . R.. HARY�Y. . Date - - � ................... = = 26971 = = aProject Engineer :....... �p�,H.UA. G..DAL7.O.N,.P,E........ � "; t�` Q�;' � �' SUNGATE DESIGN GROUP, P.A. f% ��'�,�CI NE�•�' ��` t . . �l�OS ��1111�� O `�.�' N Reviewed b . h� � Y : .................................................. , ��t RALEIGHENORTHCAROLINA27606 {''��i,�Qu.�;,��`'��%31/2017 NC COA No. C-0890