20170202 Ver 1_BSR 620025 2016 SF620025 JACKSON CREEK SR 1122_20170217

INFORMATION TO BE SHOWN ON PLANS
WS EL. Taken @ River Station 12024
Design: Discharge _..____4`�0____.___c.f.s. Frequency __.____ �5._._____yr.
Base Flood: Discharge ______12�¢________c.f.s. Frequency _._____100_______.y�.
Overtopping: Discharge_______2.¢OQ________c.f.s. Frequency._____500+ yr.
ADDITIONAL INFORMATION AND COMPUTATIONS
Elev. ---•-- 38�'�---------.fr.
Elev. •-----�86,74--------}r.
Elev. •----- 38$:Q --------�.
DA = 18 SQ.MI. REGION 3 RURAL
---•--•-----•--------•-------•------------••----------------•--------•--------•-•-----•----•-------------------•------------------
USGS RURAL REGRESSION SCIENTIFIC INVESTIGATIONS REPORT 2009-5158
---•------•-•--------•---•---•--------------------••-----------------•---------•------•------'---^-'•-----•----------------------
NCDOT DISCHARGES: FEMA DISCHARGES:
--Q10--- 500 CFS---------------------------------------Q10 = 509 CFS
------------- ----------------------------------•-------------------------
Q25 = 650 CFS
----------••---------------------•-----------------•-------•--------------------------•------------------•---------------•---•----
-- 450 = 750 CPS------•------------•-------------------450--- 970 CFS
Q100 850 CFS•-------•--------------------•--------Q100--- 1236 CFS
•--------- ---••---•---- -•----•---•---------•------------•---------------•---------
Q500 = 1200 CFS Q500 = 2078 CFS
'"""'"""'""" '"'"'"""'""""""'""'"""""'"""""""'"""""""'
NCDOT Q25 WAS USED FOR DESIGN DISCHARGE
100 YR CONTRACTION SCOUR @ River Station 12024
- --------------------------------------•--------------------•------------------------•----------------•----------------•---------
_Yz Y� [Q2/Q� ]�[W� /Wz �K�
Ys Ys Yo
- ••--------•--------•---------------------•--•----------------------•---------•--•---•--------------•------------•---------------
N!
0 69
Y =6J6 723fi/777 lail5
z Yo 8.33'
[ ]I 1
Ys =1.7'
----•----------------•------------------------------------------------------------•---•-------------------------------------------
SITE DATA
Drainage Area , 18_ SQ,MI___________________________ Source ,USGS_QUAD /STREAM STATS
- ---- -- ----------------------------------
River Basin LUMBER__________ ____ ___ _ Character RURAL (PIEDMON�
Stream Classification (Such as Trout, High Quality Water, etc.) ._WS _II_ HQW
Data on Existing Structure _1@17_4'_, 7@78'0'_ TIMBER DECK ON W16X36 I-BEAMS
-------•--------•-----•-------------------------------•----------------•------------Total Waterway Opening---- 224---•--- s.f.
Waterway Opening Below 100yr. WS EL..___�67________ s.f.
Debris Potential: Low __X__. Moderate ____.___ High .____.
Data on Structures Up and Down Stream ---•-------------------------------------•---•---------•-------•-------•-----
UPSTREAM - TRIPLE 9'X9' REINFORCED CONCRETE BOX CULVERT
------------------------•----•--------------•-----------------------------•-----------•-------•-----------------------------------
NO _ COMPARABLE_ DOWNSTREAM _ STRUCTURE _____________________
MAINTAIN OR IMPROVE
------•---•---•------'--•'-------------"-'--•----
Design Control Elev. ,EXISTING L0S25YR WSEL_ft,
Gage Station No..-----wq------------------------- Period of Records wF'`--------------------•----------- yrs
Max. Discharge ----- w'°`-------------------- c.f.s. Date ---- wq ------•-------- Frequency ----- WA
Historical Flood Information: TIM CULBERSON
NEVER DIVISION BRIDGE Period of
Date OT____ Elev.wA____.ft.Est. Freq. w!�___yr.Source M?INTENANCE SUPERVISOR Knowledge 10+____yrs.
--- -- • -- - - - - - - --- --- - ------•
Period of
Date-----•--- Elev.---------ft. Est. Freq. --------YcSource --•----•------------•-------•---•-------- Knowledge•---•-----Yrs.
Period of
Date-•---•--- Elev.---------ft. Est. Freq. ---•----YcSource -•-----•--••------•-------••----•-------• Knowledge----------Yrs.
Historical Scour Info. : General NONE ft. Contraction NONE ft. Local NONE ______ f}.
FEMA EFFECTIVE
Channel Slope___ 0 002_ Wft Source MODEL_________________ Normal Water SurFace Elev. ___ 380 9____________ft.
Manning's n:LeftO.B.___O15___ _Channel____R.07___RightO.B.___�:15...__Source FEMA_EFFECTIVE_MODEL
Flood Stud /Status LIMITED DATE 1�17/1006 PANEL: 8512 Non-Encroachment
Y ... -----------------------------------•---•-------•-------- Established? YES
Flood Study 100yr. Discharge.__ 1236 _.c.f.s. WS Elev.: With Without
Non-Encroachment.386,14*�. Non-Encroachment 385,6 __ jt.
@ River Station 12024
* From Duplicate Effective
DESIGN DATA
Hydrological Method.FEMA_Q /USGS /STREAM STATS
Hydraulic Design Method_HEC RAS VERSION 4.1.0 (JACKSON W TRIBS_prj)
Floods Evaluated: Freq. Q Elev. Backwater Bridge Opening Velocity
(yr.) (<.f.$) (ft.) (ft.) (f.p.s.)
@ River Station ----- ��------- ------- 500------- --- 384.3**----- ---0.4** -- --•----- 4 3------------
""
12024**
----- 25 ------- 650 --- 385A** --•OJ*' -- --•----- 4=�-
----- 50 ------• 750 _._ 385.3**- --•0.8.... .-•----- 4=$-
------ ------- -'-• --•--------
QFerma. ----- 700--•--- ------- 1236------ •-- 386 74*`--- ---1 57*'- ----•--- 6 03----------
500 1200 386 7**_____ ___1 6"" 5.9
Watenvay Opening Provided Below:Design W.S. Elev. _. 140_._s.f.,l00yr W.S. Elev. _._205___s.f.Total._ 29?___s.f.,
czzs Qss
Average Channel Velocity (Design)_._?_3____. _.f.ps. Average Overbank Velocity (Design)___�_6______________f.ps.
Computed Scour : General ,.. N!Q..,.. 4ioo ' 1.7 WA
-•--•-ff. Contractron --------------------N. Local -----------------•--.. ft.
Is a Floodway Revision Required? __ MOA TYPE 2B
•---•-----•-----------•-------------------•----------------•--------------------
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�: BRIDGE SURVEY & HYDRAULIC DESIGN REPORT
�; N. C. DEPARTMENT OF TRANSPORTATION j_C
Wt DIVISION OF HIGHWAYS `,,�1d°
w, HYDRAULICS UNIT N"
�; RALEIGH, N. C.
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Y: I.D. No.__620025•------ ProjectNo. _176P.8:R.116.--•-•-------•--• Proj. Station 18+71=L-
-- - ----------•---------
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• Counry __MOORE _ Bridge Over �ACKSON CREEK __ Bridge Inv. No.__0025____
��.,t -------•-JACKSON --•-------
o� On Highway SR_7122 SPRINGS RD. Between __ NC..73_____________ a�d ,_ SR 7004 ___....._._____.__.________
N�•-------•----•---
��O' 1@55' 24" CORED SLAB WITH 4' CAPS UTILIZED
; Recommended Structure ••-------•---•-----•------------•-------•--------•--------••-------------•----------------•-------
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�,• --••------••--•-------••------••-••••---•---••---•---•---------••---•-••--•-----•---•----•---••---------•----------------•--------
�n; 30' 10" CLEAR ROADWAY (33' OUT TO OUT) Skew _ 90°
o� Recommended Width of Roadway -----•---------•---------•-•.....-----•--------•-------
�� Recommended Location is At Stream from Existin Crossin
(� �� 9 9�--••--------•------------------------
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LL Statewide Tier ❑ Regional Tier ❑ Sub-Regional Tier �
� Bench Mark is BM#7: N:525,179; E:1,815,442 -BL- 18+44.95 44J5'LT
' Elev. __ 385_975 ft. Datum: __ NAVD 88
�n- ---------------•---------•-------•----••----•------------•-------•--- -----------
�; Temporary Crossing NOT REQUIRED. OFF-SITE DETOUR
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�: Designed by: ��ES A._CROUSE PE ��� SEAL �: 3
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a; Assisted by: DAN DUFFIELD PE Date ___________________ �' �; O,4'w0�44 .��,�
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N Reviewed by: �/'�'�"'�/" �. � ""' Suoe300xFarksRoad `��''1(L1Alll1�'��w,l
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�]��5 I(o Rafeigh, NC?7605
CRice', 919.322.0115
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