20161043 Ver 1_BSR 75 0175 2016 B5928 MILL CREEK SR 2614 (2)_20161028

ADDITIONAL INFORMATION AND COMPUTATIONS
._DESIGN_FQLLOW$.SUBREGIONA4 TIER. GUIDELINES-_-_------------------_------_-----_--_-----,----__,-____..
CULVERT MODELED. AS_$�al?(X14/RCBC__WITH_ 5' BLOCKAGE_ IN__EASTERN. MOST_ BARREL TQ. ACCOUNT.FOR.._
,OVERBANK_ SEDIMENT_BLOCKAGE_jNOTE; THIS_IS_1'_HIGHER THAN_.THE 4'SR�)_AND_1' BLOCK,4GE.IN_ THE_______
OTHER NJO,.BARRELS TO__ACCOUNT_FOR_1'BURIAL.______________________________
'NOTE_NATIVE MATERIAL CONSISTS OF_MATERIAL THAT_IS_EXCAVATED FROM_ THE_STREAM..BED,.OR. .
FLOODPIAIN AT,THE.PROJECT,SITE,DURING_CULVERT_CONSTRUCTION,_ONLY_MATERIAL_THAT_IS__ , ,. ________
EXCAVATED_FROM,_THE_STREAM._BED.MAY_BE USED_TO__LINE_THE_LOW__FLpW__CULVERT_BARREL,_RIP________
RAP MAY_BE_USED_ TQ SUPPLEMENT 7HE.NATIVE MATERIAL IN,_THE_ HIGH_ FLOiW _CULVERT_ BARREL(S) _.______
IFRIP_RAP_IS_USED.TO.LINE,THE.HIGH FLOW,.CULVERT.BARREL(5),NATIVE_M/ATERIAL_SHOULD_BE __,______
PLACED_ ON _ TOP_ TO _ FILL VOIDS, AND _ PROVIDE. A_ FLAT_ SURFACE_ FOR_ ANIMpL PASSAGE._ _NATIVE_ _ __ ___ _ _ _ _ _ _ _ _ _
MATERIAL_IS SUBJECT.TO.APPROVAL.BY.THE.ENGINEER AND MAY_BE SUBIECT,Tp. PERMIT CONDITIONS.__.____
P.IS�HARG�S_�9MPllT[A__S15lKG_.USG�_SIR__2QQ4-515@.RU_RAI.�QUA7JOt�S,REGI9N.� ....... ............... ....
._RA=.9.lmi' ----- .... -- ,-...- - -. .__.- - -
.._-..�1lRALRIDGE.and �ALLEY-P.tEDIr1QNi. _. . . ... _.
. . ...... ..- -- -- ....... .......- -� -----
USGS SIR 2009-5158
- ------- - ' -"'___ . . . . . . .. ........
- --- -.' -"--- --------- --------
0.61] _""_'_' "'""__'_"'"
QlQ 398 (9.1) - 7554, SAY 7600cFs F�MA. D�SCHARG�S: __
0 606
Q�= 537 (9.7) - 2047.SAY 2000cfs- .- --.- --_ aq�.1448cFs
.. 0.600 . . . . _ . . ... . . ...""'"'
Q�- 667 (9.1j. __. 2486, SAY 2500tfs -. ..-_. Q5a-2459cfs.. _
. .. . . ... .. .... . . ._..
0.594
Q,00. _ 776 (9.1� .= 2880, SAY 2900cfs . - --- .. . . Q�o. -2976cfs. ..
.. ......
o sea
Q�- 7,072 (9.7) . - 3884,SAY_3900cfs . _ . .. . . _a�s� =4433cfs. .---- , ----
**FEMA_ DISCHARGES FROM_.FEMA, STUDY USED, FOR FEMA.COMPLIANCE AND D�SIGN ., „ , ___.___
Qss DETERMINEp FROM USGS SIR 2004-5158.
SITE DATA
Drainage Area --------------9.lmi�.---------,--. Source -------------- USGS_QUAD__MAPS----,-------------
River Basin _.__.....__CAP.�_F_EAR_.__-------- Character _---------------- RURA4..-.------....---------.__
Stream Classification (Such as Trout, High Quality Water, etc.) ____.CLASS.C_ WATERS____.______________
1@14,_2,• 7@73,_1••CONT, 1@17' 7@287„ 1@77,_7„ 1@77'7"SIMPLE
Data on Existing Structure TIMBER_DECK.QI�{.APPROA�H:(-B�pM$j�OP(TIJyUdUS),MAINJ-BEAM�_________________
END & INT. BTS: TIMBER CAPS & PILES, INT.BTS#3&4: CONC. ENCASED
Total Waterway Opening _____GOl_._.__s.f. Waterway Opening Below 100yr. WS EL. ____ 347_____s.f.
Debris Potential: Low � Moderate � High ❑
1@37'-7" 1@30' 1",1@31'-7"
Data on Structures U and Down Stream UPSTREA{v1;RANDOLPH �k174;_PRECAST_PRESTRE$SED CONCRETE___
CORED SLAB (BMD-29� END & INT.BTS:PPC CAPS ON STEEL PILES, STEEL PLANK BULKHEADS
DOWNSTREAM_ RANDOLPH_#354; 1@30'-3", 1@40',.7�30'-5"STEEL.PLANK _DECK_ ON__ 1-8EAMS�.___.______________
EBTS:TVv1BER CAPS&PILES, INT.BTS:STL CAPS&PILES, CONCRETE ENCASED
Gage Station No. . . ____. WA . , . ... ..,.._ Period of Records .._ .._, _.,_ ,_ty4y___ yrs.
.-- -- --
Max. Discharge._ _....__WA_- ,------c.fs Date.. ....___ K�A_----__-. Frequency-_- --Wp------._-
HISFOf7CC1I FI00(i Ill'FO�RlClt1011: COUNTY MAINTENANCE ENGINEER, RICH REID, REPpRTS NO KNOWLEDGE
OF OVERTOPPING OR FLOODING ISSUES IN PAST 38yr. period of
Date------------- Elev. ----_--.ft.Est. Freq. ----....yr. Source -_,-_--- --- ----- - ----...-_--_-._Knowledge--_.._yrs.
Period of
Date-----_----- Elev. --------.ft.Est. Freq. -------Yr. Source . _.._.._--.--- -. - _-----.-----_---Knowledge_----.yrs.
MAINTAIN OR IMPROVE
Allowable HW Elev.._.____. 25xr&_ 100yr BACKWATER_________{}, Normal Water Surface Elev. .., 505.8 ft,
FIELD OBSV.
Manning's n: Left O.B. 0,11-0J4_ Channel _ 0,045., Right 0.B.0.11-0_14 Obtained From ____FEMA__________
Flood Study/Status DETAILED_FLOOD,STUDY,REVISED_DATE_03i162009_FloodwayEstablished2_._YES__.__
With Without
Flood Study 700 yr. Discharge _„2976„ c.f.s.; WS Elev.: Floodway _.516,6.___.ft. Floodway...._514.•5....ft.
@River Station 28030.0
DESIGN DATA
FEMA DiSCHARGES FOR 10yr, 50yr,100yr & 500yr.
Hydrological Method_USGS,SIR.2009-5158 REGION__1,USED_�F`OR,25yr,..___,.
Hydraulic Design Method .. HEC-RAS VERSION 3.1.1 ___
Design Tai�water � Q 5,3., .. $.; Q k.9 ft.;Q� Z,6 ..ft.; Q _.9.•4 ...h.
to . zs - 4.2 - ft.; Qso 00 - soo .
InIeT ConTrol Ootlet Conirol
Size & Type (af�.s.) K e HWiD �{�W' dc dc Z D ho H �So (,yy, Remarks
3@72'X74' RCBC 10 r
3 72'X74' RCBC 25 r ZO 0.2 RES LTS M DEL D I H-RAS
3@12'X14' RCBC 5 r 245 .2
3@12'X74' RCBC, 100 r 76 0.2
3@72'X74' RCBC, 500 r 4433 0
3 72'X74' RCBC 500 r 5330 0.2
Is a Floodway Revision Required2 __ YES, MOA. TYPE.26._.. Total Proposed Waterway Opening .___ 42Q._....s.f.
OutletVelocity (V�o) ------------b,$---.-.---._.f.p.s. Natural Channel Velocity (V�o) ---_------6.7--------------f.p.s.
Required OutletProtection CLpSS_IRIP_RAP_jBANKS_ON��__----------------_----------------_---__------------.-
WS EL. Taken @ River Station 27939.50
Design: Discharge _____2000____c.f.s. Frequency___.__.__�5_.______yr. Elev. ._........514,6.._,_._,._$.
Base Flood: Discharge __..297¢.__ c.f.s. Frequency .___..... ���.__...yr. Elev. .___.__.�16.71_..__..._.ft.
Overtopping: Discharge ,__ 5330.._., c,f.s. Frequency _...,.._ 500+__._..yr. Elev. ._._.__.. 522,47.__,_.._, ft.
LIMITED DEiAIL STUDY
; CAPE FEAR RIVER BASIN
,�; CULVERT SURVEY & HYDRAULIC DESIGN REPORT
� N. C. DEPARTMENT OF 7RANSPORTATION �. I bG
`�� DIVISION OF HIGHWAYS W
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�; HYDRAUUCS UNIT
RALEIGH, N. C.
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JI.D. No._....B-5Q28._. ProjectNo- --------------46377,1:1_..__.. Proj. Station -----J5+73.-4-.___._._._
�' Coun
fi'--------RAHDOIPM--._.. Stream ........ .......M11,4.CRE�K-------.. .._...-------Stru.No..----17�---
a SR 2674 SR 2221
�n, On Highway__ _fGRA,NIYILLE_RD�____ Between _(JENNIFER.VIEW__DR)and __ SR 7Q03_(PLEASqNT RIDGE.RDj,
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.o; Recommended Structure ._3@9�'X14'REINFQRGEp._COt�(�RETE._@OX_G�1�VERT,_BUR�ED_7,0'__ .___.__._ _
--
�'. WITH 4A' SILL.IN EASTERN__MQST BARREL� REMAINING, 2_ BARRELS - 1,0' SILL.
- �---- ---- ---- - - -
�
�; Recommended Width of Roadway 40'.SHOULDER. POINT__SHOULDER_POINT __ gk� ,.45_ ___, __
�;
� Recommended Location is (Up,At,Down) Stream from Bxisting Crossing.___._ ._AT_EXI$TIyG________.__
d
�+= Statewide Tier ❑ Regional Tier ❑ Sub-Regional Tier �
g Bench Mark is _.RR_SPIK�.IN__6�4S�.QF_H__F��_ PP;..-8�-..STA.7+Z4,40,_Z�'.4t--------------------___,-----.__-
' -----N_ 712366�E_7796460-----------------__._-----_.-_-_-- Elev. -----�4D.23._ft. Datum: __..__NA�(D.8$_-
� Temporary Crossing ._ NOT_REQWIRED;.OFF-5ITE_DETOUR
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�� Designed by: _._____._.�REN,_HEFNER,PE_.__,_____
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MELANIE NGUYEN, PE Dafe �q__.y 2 �pr
=i Assisted by: ..-----__-ANDRE\K._NflT7JMGHAM,-PE-_--.
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: Project Engineer : --- - �.HI .. R.PE.-----------_---
mReviewed by: _. "(._��__.._��'/ ° �`
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