20211105 Ver 1_Jackson County - B203 - Hydro Report_20210816

DocuSign Envelope ID:CF6D9777-2731-428C-8F66-3A2CF7780048
I I 1 --- I - ---- I I I l _i_E__ I I 1
NE- ENNEN=MMEMMINIII Ell
,_ ril vill 1
II _i_l_ _1_ k__LI
i _ - 1 ....- .. _ 11 - 1" -- I I I I
-
II 111111111MIll MN
•111 NM
[ 1 ■■ --- ---- - --- --- --
il 1*-1 I
IN 111111
MI NM
111 - --
- -"-�-- •---- __ I-- ■ ■■■•-■- ■ I -1-1 ------r _ _
I ENN■ UUI ■ENI I I
I -
IN MIME
i ,.. 1
1- �' j �� - - - - <'c
EM jell 1 1,. •
91i7.31
3JOId8 �JNIISIX3 JNOIV 3lldOdd ■■■-� 02k£ � 8 \ %1 ' `;F'.rp : I-- -_ 3 i I I �r
. s� 1 ' ■- I■11111 11111i ____ _ 1111 rn
_I _� I-I . �T -- __ -� p - ' pax- I � c�__ - ------- --__
�,_�__'-________________ dNOl l5 1 - II -- __ - - - - _ -- - 7 �i_ 1 I
-------- �¢y e, I ■ ■■ ' ■� �I-■■■■■ I muumuu■ - -
- -
- dd21 dill ' \ • \ ri•���■ ■■•■■■ _- - O �■ . --- !' l
�i a3AOW3d 38 01 1 ��. DI-r is sL+ZI roes . -- -.
.01i &INN aNV 3Jaid8'1SIX3 1iY II I - 8 SS D �Q�Y * - ------ -= T- - -- ---- ■■■ _._-_
��iiry I ��� I of aoa�as aN3 oes.. ■■ TM- ■ 14` EEH!! - - - _ -- - ! ■■i _._
=i - ■■■- y■ \ - ■■■ - --- - - -- ---
- _.- .� � ►� I I ■■■ LTA
MEE I 2w .a f F� 1 �`TtI1°as�� �\ l��j I - ` I 1�CO r) -
___ (AAA 3111X31030/M ■■ ■■■-■- �_ uq4 .. ,08.0LIZ Ob'1 N, ° i�►,, . '1-"I \,•,-r' • - _ - - - © -- 1 _. -.I.
dV11 did 11 SSV1D - .„ hl!► -- ---- _"'� -- .I\ ■MEE■■ O N - -.■
13NNVHD Ol 1VWdON � El ela'Ali rp \ 0 --- -_ O 4I .L_
-
NOIIVAVDX3 3dOlS L:S•L 1 \ �_,, � •� o 0 ti0`'
I" sip--
, .... on
1NTMIN VEIW3 IV dVII MI •• -■- ■ter■■■ - 1 o, \ , \ p `�
•
- • ___ -ill- III I . i Q U, ,� I ,..(,- ---- -I ,
■■■ _ 1 - -- ■■ ■■■-■- i!■■■ill _ I ✓�- \� _tS \.. 4 ' L, _ I I ' i • ■-■ i
.-... ■ • I �..1...-.- II.... �� I I �� ° I I I I •
■■■ • ■■ ■■ ■■■■ ■■ C ■■■ \ \��,� ,ExV , ( I1'vR2IFl13fla1S) ' - -_ • _ ... _
■■�■■■ I 43211f1b3i1 SNlbIa �]3a ON ■■■■■ ■■■■11■■ 'l• J�i .,_.�- .�:1. ■■■ ,. I �I', `,\ , \, p I _ _� E, ■ - -{--,-- --I
■•■�• ■•■■• Boom I■■■ i ■� ■ N 1i ,mom - \ � - M a '�'21�:F 11 S ---- - -______------ - -- ■ ,,
5£=3°JaldB d0 aN3 1V HlaIM NIW ' ° 1 _ \ ' ! '
�^ ' SNCJI �1 'lS3 I VI- � r ����� � O � 1
■■■ ',V'�=H1aIM d3alnOHS 3aIS 1H°31d 1VWdON= , ,El�1MC1 1■_i ■■... 11"�I 1-n- -III : 5.\ I TI to �- ■ �� C. �I ^-� im C L_.1. �. 1 I.-._1...-
I� _ 1a Lz'£ =ad3dds ■MENNE■■■■ - - _�■. ,■■.................. ■■■ �., I_ ! I i -I- Le -I AT -a-I ligE- ---_J �I �i - I lj
um.-■■�■■■■ ■■■■■■■ I --_-_ ■■1■ _(_ Eg11111•1111111111111111=11111. 11VIIIIIMM!glir
.■u� l kit�Ei�■ �■■■■1■■ " 1■ _ \ . ``; g': - - --- _ ! --- -- ■■-- 9_. '� r'J.3 .5'£ =H1a1M d3alnOHS � + I rt--' - ,
•
■�-■■�■■■■■ IA VT =3,101S SSOdJ muumuu. NT W \ I 19 . I --4 _sue ■ ■■� .
-■ ■�■-IMMINE.MIII�-- 41,11 £5L0"0 91'0 lS It�VNIan110NO1 MENEMEN■MENEMEN■■■■■■ -li -mi4ARIHJLZi�■■■■■■■ mar yidcc
■ --- _ 4 m■u� g1■■ I -I I ■ �u
6'O =D ■E ■■■■■ -■■■■■■■ ■■■ Ili:
of p}5 � ■ _■■ice i 'Cgli.
1� 1EN iiiiitumfornmmomm
� NMENN• M■■■■■■■■■■■ o� - I' - ������ _� ( -■■ ■■{■-■-�■■■■ ■■ mu ■■■ -■■■■■■■■!■.. -1 1 Mummy .mMI ks= ■■ .■ . ____-= i .� .- E .
1.1 1111.111'"C) Ili
■�-■■ I. SISJl1brN`d ab'321dS � I. I _ = 1 1111Prilbiliiirillildo 1■■■■■IIIIII �r, o � I " ■ -` � �� -,a Ii�17J ■■■ +
■..-■■ i . _ -■■■ ' -I , ♦•• , , -. -U 1 i■■■II■�I�i�� 0 � Z I '■■■■ i I I ■■■■ ■ ■ ■■ ■ ■■■ ■
��-■■ 9a1d8 d0 3DVd SRW dd'13 L9Z ■■ I a31VA3X 38 Ol ♦♦ ♦ ■■■■�1■■ ■■■■■■■■- ■II■■■■■ 111111111
■ - - I ■■■�� ' ■1 1 1■ 1 __ .-■■ 3 31VW 310N3a ♦♦ ■ RirriI■■ 11�■■ ■■■■■■■ I, 1111■ ■ ■■■■ rn ;��-■■■ bL8LLNOIID3S� ■■ IVId �� ■■■■ 1 ■ 7Li.'C'7■ ■■■■■■■■■■■■ ■■■■■m ` 144" -,1■ ■ -- I I- ■■� ■■■■ ill1 --
k� e1 ' O'f'LLZ a3SIA3d � ■■�■ -■■■■■ ■ G, R!n. ■■■■ lip o • . g:!l l . ---- _-- ---- __ ! - -111:1111111 ~- -----_
imil 1 1 �■ "-M11 M , 1111 111111111 _ 1 ■ •
muumuu■-■■... INI 1 KILN . .
ir'£LLZ 3A11D3333 a31D3ddOD -
■ ■■■� • ' - I 91L ' - IIi - - W M19dn s■� "' 1? 111,■■ ' ■■■■■■■■■■■■■■■■ ■ I � r mi ■ -- -
■■-■■■■ •�� - ;: , - m.°W_d.■ •, I `: 1 I IS R�IVRIII■■■■ ■ - _ `�' ■■ -■U" t/1
aL00L = I� g_L 1 LZ 0 1 aNflOd`J 1Vdn1VN > _ : 15 ILLY- 1 -_.�ld "I ■■■■M �� is _
_I■■11 1111 11 _ _ ■ ■ _ .-I; MUM III �, 21 �,
3l9`Vl 3DNdW2lOdb3d _ I I- ■■■ 1■■■ ■- - -_ ram_._ -■--
■■y■-■■ ■■ � ■■ - I � �■■- ■ ■-■ -■■ /996 Ol-) /LI£' ---_ ��� _- Ol� _�i�■ 1 �10 1 II 11■. ew�� C:1 - --- d IG�:1�11 ME NMI
� -�� --- :::1115 ----- '�� -- ..■■�■.:.t I r. ■
- - - �3sm- . M11■ ■ ■■111■'-■■1■ 11 a3SOdOdd Nil
€9/f ) /662s�Z� •.O - i - - 1� ---U- 1_ !y •
M 4 _ __
I i 3'Ja1d8 w°cvLwNoiiD3s` d�'13 9s _ ii!EEEiE
■■■■■■■■ ■■■■-- ZI x ■�z �� -- -- - ■ _ i i- muumuu • _ so s� 11os = �� y■ ■ - �� - ■ ■
1 6'�LLZ 9'£LLZ t+'ZLIZ 5'LLLZ 8'OLLZ Z'L9LZ a3SOdOdd --. ill
■11 �1 -muumuu 0099t01 =ld ■■ ■■� Irenal
■ - ' Z/'69PZ = 73 ■■ ■ ' --. r
, i - 1-■■■■- I_ 1.91 Z -
00'01t11 -Id
■�- 017LLZ L UIZ S'LLLZ L'OLLZ Z'OLLZ L'99LZ JNIISIX3 - jaminimm -■■ o o V -■-■-■■11111 ■■■1111 I t I I I
9VLLZ O'£LLZ Z'ZLLZ O'LLLZ 069LZ 9S9LZ 1Vdn1VN - ■ - =■ , - �
9N��■�� �....- ..:
MN
005 OOL 05 5Z OL Z II
1 I 1 : L-
III
1 1
3l8`Vl 3DNdW210dd3d - _- ■ 1 _ ■ '■■1•■■ i iNE31/t w ■■1i■■MMENINi■ _� -_ I MINN I 1 ---
--MEE= 1111.1
II
II - !�-- - I __ ■■-■- I ._ ■■■■ ■■■-■■�■■■■Um�w~te'1oI , ••. - _ ■l■ ■■■■ ■■■■■■■■I I -�._: _ 1 1 - i
I
00 V[ 00 E 1 00 + Z L 00 11 00 + 0 L
SITE DATA
INFORMATION TO BE SHOWN ON PLANS
WS EL. Taken @ River Station TT674 Drainage Area 50 SQ. MI. Source USGS TOPO MAPS (SYLVA SOUTH)
2320 2 Yr 21b7.2 BRIDGE SURVEY & HYDRAULIC DESIGN REPORT ��y
Design: Discharge c.f.s. Frequency * yr. Elev. ft. River Basin LITTLE TENNESSEE Character RURAL 0 1
N. C. DEPARTMENT OF TRANSPORTATION
IP Base Flood: Discharge 9390 c.f.s. Frequency 100 yr. Elev. 2173.6 ft. Stream Classification (Such as Trout, High Quality Water, etc.) WS-III; TR, HQW coots DIVISION OF HIGHWAYS ��
N HYDRAULICS UNIT
Overtopping: Discharge 3080 c.f.s. Frequency 2-Yr+ yIr. Elev. 2168.3 ft. Data on Existing Structure 1@17'-10", 1@39'-10", TIMBER FLOOR ON TIMBER JOISTS AND I-BEAMS as ce RALEIGH, N. C.
N
* EXISTING LEVEL OF SERVICE IS BEING MAINTAINED. W/TIMBER CAPS, TIMBER POSTS AND CONCRETE SILLS Total Waterway Opening 373 s.f. eLLn
ILI
Waterway Opening Below 100yr. WS EL. 373 s.f. !o I.D. No. SF-490203 Projecit No. 17BP•14•R•145 Proj. Station 11+80.31 -L-
ADDITIONAL INFORMATION AND COMPUTATIONS Debris Potential: Low X Moderate High Nv
Data on Structures Up and Down Stream oO County JACKSON Bridge Over CANEY FORK CREEK Bridge Inv. No. 203
DRAINAGE AREA = 50 SQ. MI. UPSTREAM: 490101; 2@26', 1@40'. TIMBER DECK ON STEEL BEAMS, ON CONC. PIERS /ABUTS. o"' On Highway SR 1738 Between CANEY FORK ROAD and NO OUTLET
o,>.
USES STREAMSTATS VERSION 3-0 DOWNSTREAM: 490052; 3@45'. CONC. DECK ON CONC. BEAMS ON CONC. PIERS /ABUTS. �Q Recommended Structure 1 @ 70', 24" CORED SLAB W/VERTICAL ABUTMENTS
HYDROLOGIC REGION - BLUE RIDGE(REGION 7) 2173.1 V
Design Control Elev. ft. Revised 100-yr BFE
Q2 =2,320 CFS FIS DISCIHARGES Gage Station No. NONE Period of Records WA yrs. Recommended Width of Roadway 24'-10" CLEAR ROADWAY (27'-0" OUT-TO-OUT) Skew 60�
Quo =5,150 CFS (USED FOR FEMA COMPLIANCE) Max. Discharge WA c.f.s. Date WA Frequency WA Recommended Location is ( t • M, Down) Stream from Existing Crossing. UPSTREAM
0
Qzs =6,780 CFS Q100=8630 Historical Flood Information: iZ Statewide Tier ❑ Regional Tier ❑ Sub-Regional Tier ❑x
u_
Q -7,960 CFS Period of ❑ Bench Mark is BM#2: N 591804 E 765806 STA. 7+34.00 -L-, 17' LT
so - Date 2015 Elev. 2167 ft.Est. Freq. 2 YR+yr Source JODY HOOPER (RESIDENT) Knowledge 20 yrs.Period of Ln
°"
Qano=9,390 CFS Date Elev. ft.Est. Freq. yr.Source Knowledge yrs. 10" SPIKE IN ROOT OF 15" PINE Elev. 2171.56' ft. Datum: NAVD 88
Period of
Q500=12,500 CFS Date Elev ft.Est. Freq. yr.Source Knowledge yrs. p rY Crossing
�r Tem Temporary STAGE CONSTRUCTION
a
m
Historical Scour Info. : General ft. Contraction ft. Local ft. t.
ABUTMENT SCOUR FOR OVERTOPPING FLOOD (NCHRP 24-20 EQUATION): 0.005 EFFECTIVE MODEL 2152.8 ° ` x
) Channel Slope ft/ft Source Z ` '*Y `' ,• , f' l „,+ ";,;.'" > � ql.,4,:' > ,
Normal Water Surface Elev. ft. lit ;
Q1= 2728.5 Manning's n: Left O.B. 0.030-090 Channel 0.05-0.055 Right O.B. 0.030-090 Source FIS �? '' s�..y� $ � _ „ "'9�, �r """
Non-Encroachment2 1 'r +
WI= 81.2 Flood Study/Status LIMITED DETAILED STUDY (EFF. 4119/2010) Established? YES M fi .:, r ;�„ d M
q1= QVN1= 33.6 Flood Study 100yr. Discharge 8630 c.f.s. WS Elev.: With Without o k • "
Non-Encroachment 2173.1 ft. Non-Encroachment 2173.1 ft, o` .'�' �. -' _ " -
Q2= 3080.0 @ River Station 11623 ` " �
cA
DESIGN DATA Z #Q `N
f`Y ..e fM D �Nt`iYs -..;..- hlr-- '�..•'.' . :l''
a. -.,...ter, r.� ..�.+ t j,.•...
q2c= Q2NV2= 54 Hydrological Method SIR 2009-5158 REGRESSION EQUATIONS (httpl/water.usgs.gov/osw/streamstats/north carolina.html) ❑ •,,, 1
, v 4, .. r v4 :- )llly'„YR.•.' q 4& ,- 1'4, y,`''
Y1= 6.5 Hydraulic Design Method HEC-RAS V 4.1.0 (SF-4900203.PRJ) r) "r a ` M H;
O - :. -,.-- .y l ai 3 , ' ..,..'n i
CsiYc= Y1*(g2c/g1)^(N7)= 9.7 Floods Evaluated: Freq. Q Elev. Backwater Bridge Opening Velocity ,4 , 'Y
(yr.) (c.f.$) (ft.) (ft.) (f.ps.) Z %♦� * 4��
g2/g1=1.6= > AlphaA = 1.5 @ River Station 2 (Design) 2320 2167.2 1.6 6.9 f ‘ _ ' ! '•-"" • `
NO STRUCTURES WILL BE ADVERSELY AFFECTED 11674 ..
Y Mom• �"
t.
10 5150 2170.8 1.82 11.7 , * a " " �' a
Ymax= AlphaA*Yc= 14.4 BY THIS PROJECT v �" ..'-',',.,A!..:'" • ,, .1 w
YO=7.5 25 6780 2171.5 0.51 14.1 •: 4, t
Ys= Ymax - Y0= 6.9 FT. THIS PROJECT COMPLIES WITH LOCAL FLOODPLAIN 100 9390 2173.6 0.58 13.1 le \\\11111111J//f
MANAGEMENT REGULATIONS. c �0\ , C A /'
OVERTOPPING 3080 2168.2 1.70 9.1 O W ��N,\ R�<� '
w -D:uS •p'.'L9
Waterway Opening Provided Below Design W.S. Elev.337 s.f.,100yr W.S. Elev. 337 s.f.,Total 337 s.f., Q O Designed by:VAUGHN & MELTON CONSULTING ENGINEERS 2/17/2017 •':'oi'r b
THIS PROJECT FOLLOWS SUB-REGIONAL 6.9 0.0 U CONNOR R. BOYLE, P.E. Date \-57C35, b3 14... 5 -
TIER GUIDLINES. Average Channel Velocity (Design) f.p.s. Average Overbank Velocity (Design) f p.s. Assisted by:
Computed Scour : General NSA ft. Contraction 4.4 ft. Local N/A ft. Project Engineer : HARDY WILLIS, P.E. ;0O,L'�NGIINE�,�`4�
Is a Floodway Revision Required? MOA Type 2e N Reviewed by: .% 4 �c� __ '` //T. /,���'oR R �o�\\\\\
lllllllllt\