20181317 Ver 1_Macon County - B244 - Hydro Report_9/28/2018 1:48 PM

ADDITIONAL WFORMATION AND COMPU'TATIONS
_ NOTE_ BED__MATERIAL.IS_BOULDERS, COBBLES� SAND_ AND__GRAVEL____„__..____________.__________.__
_BANKS_ARE_VEGETATED__AND__STABLE______,_____.._.________________ _
25'-3" X 7'-9" ALUMINUM BOX CULVERT; AREA = 162.4 SF
-------------------- ------------------------------._...---------------------------------._----------------------------------
BURIED 1' FOR 12' WIDTH, BURIED 2' FOR 4.625' WIDTH ON EITFBER SIDE WITH
2:]-SLC1F�-8ET1A!E�N.-]'-AND---2'[e-mail]--PO�TIOAl.---------------------------------------------------------------
TOTAL BLOCKED AREA = (12'X7')+(2X(U2X2X7)+(2X(2X1)-I-2X(4.625'X2') = 36.5 SF
fFfEE�Fit/f-AREA'=---1�2.4"Sf--3�i:5--gF--=---93S:4-SF----- ------ -------------
INPUT INTO HEC—RAS AS: 19.9' X 7.75' ALUMINUM BOX
CULVERT`-WITH--A--1.43''BLOCKAGE-AND- EFFEC7IVE_ AREA -=.--125.8-SF----- ---------'--- ---_-_------
__ ____________ RURAL BLUE RIDGE
---------- ---- ---- - -------- ------ ---- -- ---------------- --�--------------- ---------
SIR 2009-5158
-----------------'------------'-------------------._.._ _._...----------'------------'-----------.....-------------
0.736
Q�o= 288 (3.31) = 598 SAY 600 CFS
-----------------------�-------�-----------------------------------------------------------------------------------------------.
0.]24
Q= 398 (3.31) = 817 SAY 800 CFS
---��------------------------ - -----�------�----._...--------------�-------�------------------------------------------
o.ne
Q�— 479 (3.31) — 977 SAY lOQO CFS
------ - ---�— ----�-------�---------------------------------------- --------- -- ------ -
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Q 575 (3.31) 1767 SAY 1200 CFS
--iaa--- --- --- ------ --------------------------------------- -------- -- - - - --
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Q54Q 744 (3.31) — 1598 SAY 1600 CFS
- - -- - - - - ----- ----- ------------------
SITE DATA
Drainage Area _.._ 2_7--Square,Mjles----_------ Source -------_--_-------- USGS.QUAD_ MAP-------------------
River Basin .________ LIT[�E_TENN�$$E�_________._ Character ______RURAL_\, RE�IQ[y_ 2__-_ BLUE_[21DC7E__._____
Stream Classificaiion (Such as Trout, High Quality Water, etc.) ______________________B_TR.__...__..._.___.__..__
Data on F�cisting Structure ..__._._� @ z5'-6" TIMBER FLOOR ON 1—BEAMS
----------------------------------------------------�--�---------------------------------
Total Waterway Opening __.._ 109_____S,{, Waterway Opening Below 100yr. WS EL..__ 109......s.f.
Debris Potential: Low p Moderate � High ❑
Data on Structures Up and Down Stream _US: # UNNUMBERED PIPE ON CRESTVIEW DRIVE
DS: #.550145 SR 1115 41.83 FT 1 SPAN, STEEL PLANK FLOOR ON I—BEAMS
Gage Station No-------------- w!4-------------- Period of Records _------------------NUA---__-_-----_----yrs.
Max. Discharge-------------W'4--------.._. c.f.s Date.-----------wA- ----------- Frequenry------- wA---------
Hist4rical Flood Information:
Period of
Dpte_.____-__._. E�eV,NEVER__ft.Est. Freq. _-..._yr. Source ________.JEFF_ ROBERTSON,_______.._Knowledge__33.__yrs.
OVER`iOF'PED BRIDGE MAINTEIVANCE SUPERVISOR Period of
Date.----------- Elev. _--------ft.Est. Freq..-------yr. Source --------- -_------ ------------------Knowledge---_--yrs.
Allowable HW Elev.._ 2194.8 (EXISTING_10 YR_ WSEL @__RS 803)_{�. Normal Woter Surface Elev. ___.2189_l,_.,_._ft.
Manning's n: Left O.B. ....Q.7._._ Channel _0:045 Right O.B. ._0,1 __. Obtained From FIELD_ OBSERVATION
Flood Stud /Status _..___._____UNSTUDIED REVISED M9/10 __,.. ____, Floodway Esta6lishedz._. NO_____
Y - - - - - --�-------------------�-
With Without
Flood Study 100 yr. Discharge ___WA.._ c.f.s.; WS Elev.: Floodway __.__.WA.._..ft. Floodway..._..1!YA_...ft.
@River Station ?
DESIGN DATA
Hydrological Method_______ __R�RAL_FLOOD-FREqUENCy_E(,1UATIONS (USG$_SIR_2009-51j8);BLUE RIDGE_REGION_._._._
Hydraulic Design Method HEG—RAS.4.14..(SS024.4 N. FORK _COlK�ETA_ �REEK_SR753�1-.- . . .
Qesign Tailwater � C�„ __ SEE ft.; Q„ ---------ft•% Q,o -- ----1t.Q� ------... ft.• Q,� ft.
HEC—RAS - � �----------------
Inlet Control Outlet Control
Q Remarks
Size & Type (c.f.s.) Ke HW ({�,�' dc �� h. H �Se (ft.)
W.S. ELEVATIONS DE ERMINED FR M EC—RAS .1.0
Is a Floodway Revision Required? _________._�p_._____..._ Total Proposed Waterway Opening.____ �26_____s.f,
Outlet Velocity (V,o) -----------7:8--------------f.p.s. Natural Channel Velocity (V,o) ------------ 6,7------------f.ps.
RS 685, NATURAL RUN)
Required OutletProtection __________________________CLASS B_RIPRAP jON SIDE SLOP S) _ _ _ _
INFORMATION TO BE SHOWN ON PLANS
Design: Discharge ---- 800 ----- c.f.s. Frequency ----------25--------_yr. Elev. ----------2794:9--------- {}.
Base Flood: Discharge .___1200.____ c.f.s. Frequency _________ 100 yr Elev. _______._.�795,8____.___ ft.
OverFopping: Discharge .__._600_____ c.f.s. Frequency__________ 10_____._.yr. Elev. __._______ �194:1_________fF.
NOTE: EXISTING LEVEL Of SERVICE IS BEING MAINTAINED.
CULVERT SiURVEY & HYDRAULIC DESIGN REPORT ���ij�,�'
NI. C. DEPARTMENT OF TRANSPORTATION
DIVISION OF HIGHWAYS �G��i���
HYDRAULICS UNIT I
RALEIGH, N. C.
�; I.D. No.__ SF-550244,__ Project No. ________ 178P,14:R_161_.,______ proj. Station .______ 14+01,00_-L-_.__.__.
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Z; County --------N�4�O�N_117d--- Stream-------NOI�TH_.F.CQR�C_GQ_W.EET!�_CRE�K.----------SRt1115°--� 244----
Ni On Highway_._SHOPE_ROAD__.__ Beiween _CRESNtE1N...RR1Y.E and .__CQK�EETA._CFtURCH__Bi�AR__.
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`��5'; Recommended Structure .25.'-3:'_x7'-9:'.A�UMINUM__BQX_CUl,\/�RT�.WlAI.._HYYS,�1]'BURI�D)_______________
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�; JA�..�5s07291.,.L,QNCz�-$�.417_2-q---------------------------NLITH._Sll-�,S.AT_W4EI.At�ID_.OUTG�T---------------..
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�; Recommended Width ofRoadway_34'_SHOUIDER_PT,TO._SHOULDER_PT,,____ $Icew____60_DEGREES_,.__..
�; Recommended Location is (Up At, Down) Strearn from Existing Crossing. ____ ,______ AT __________________
w
�+- Statewide Tier ❑ Regional Tier ❑ Sub—Regional Tier �
� Bench Mark is __________ _____BM-1.8" SPIKE_IN__THE_BASE.OF 70" POPLAR_____
. ------- - -------� -------
�O' -------------------L-_72_+98,67,,27.48'-RT---------------------- Elev. _277_3,37---ft. Datum:-----N,AVD--8$----
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�; Temporary Crossing ...._...ONSITE_DETOUR,(3. -.24"_CMP.UPSTREAM__OF_CROSSINGJ__..._.__.__._____
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oYe vi SHIRSHANT SHARMA, P.E. o�����CARp���,,�s
O Q: Designed 6y------------------------------------------------ V'5����9 ��:
'y �� Date /2017___„ •� 9 �. ,
Z"'i Assisted by: DILLON BAWAYAN ������� ���� �� SEBAhO]SAAE�,EAL �'
O: NIKKI HONEYCU'fT, P.E. 040590 :
V; Project Engineer : �: :� •
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