20160767 Ver 1_82 0030 2016 B5741 JUNIPER CREEK SR 1425_20160808

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SITE DATA FEMA LIMITED DETAILED STUDY
INFORMATIQN TO BE 5HOWN ON PLANS ; LUMBER RIVER BASIN
Drainage Area _..,_,516 SQ_MI__ __ __ Source ___QUAD /DASS.STA_0213230900__________ �:
WS EL. Taken @ River Station is$vs.00 - --� �; BRIDGE SURVEY & HYDRAULIC DESIGN REPORT ��c
Design: Discharge ------ 1880-_,-----c.fs. Frequency ------_ 25--------yr. Elev. ......---789.5 ft, River Basin -- ---LUMBER-,------ --__-_--_ Charader RURAL SAND HILL AND COASTAL -- �;
.�. N. C. DEPARTMENT dF TRANSPORTATION
Bose Flood: Discharge _...___�620____.___c.f.s. Frequeney _.____100______yr. Elev. __.__._ �9Q-4�..._._$. Stream Classification (Such as Trout, High Quality Water, etc.) _C, Sw _ �; DIVISION OF HIGHWAYS
� HYDRAULICS UNIT
Overtopping: Discharge ------ 2015---------c.f.s. Frequency ..-__-25+_-----yr. Elev. -_--_- 184J3�-----}�. Data on Existing StrucFure �@18', 1@76'8", 1@77'8" TIMBER DECK ON_ I-BEAM,----_-_-----_-----------____-- W; RALEIGH, N. C.
* OT AT SAG ON ROAD �'
APPROX. 615' FROM WEST OF BRIDGE TIM. CAPS & PILES, TIMBER BULKHEADS _ AT END BENTS & INT BENTS Total Waterway Opening ____ 398_.__ s.f. V,
�--- ----- ---- -- - --- -- - X ,
Waferway Opening Below 100yr. WS EL. ---_398._--- s.f. a� I.D. No._6-5741--------- Project No. -------.45697.1:1_.--_------- Proj. Station ._. 15+26:5 -l-
- -- -- ---- - --
ADDITIONAL INFORAhATION AND COMPUTATIONS Debris Potential: Low..._____ Moderate ._.__. High ._.._ z�
DdTa on Strucfures Up and Down Stream .___._.__.__.._..____. ?; County _.._SCOTLAND y JUNIPER CREEK __ gridge Inv. No...__30._...
. --- ------------- Brid e Over ----------- - - ------------�-
�---�----- ----- ----- - ----- - .-•
DA = 51.6 SQ. MI. ; PCT = 55.4% • PCT = 44.6% IYS: STR.#820038 ON US401� 1@26', 1@25' 1@24'b" CONTINUOUS I-BEAM5; IENGTH=76'; BUILT 1947 �j On Hi hwa SR 1425 getween _,___SR_7431 and _ SR 7427
DtSCHARGES 3 , . � , s y ----------------------------- ----- - ------------------ -- --
-- - ---_. ----------------- -- -- -- - - -- ------- ------ ------------ ----- -- - --..... -- ------------- - ------ -- - --...-- ----- ------ ------ ---------------------------- ------------------------------------------
'�' SINGIE-SPAN 7@70' 241NCH CORED SLAB UNIT BRIDGE WITH 4' END BENT CAPS
SCIENTIFIC INVESTIGATIONS REPORT 2009-5158 ; REGION 3(SAND HILLS) AND REGION 4(COASTAL PLAIN) CYS: STR.#820028 ON SR1433; 1@34'll" 7@50' 1@45'1" CORED SLABS; LENGTH=130'; BUILT 2010 ,o; Recommended Strudure _ _________________. _._.____________...________..__._.._.._.._._._.._________._.._____._.._
-----,_---------------- --------- ---.._...---.._..._-�------� ---- -------....- - -- - � --- ---- --------- - ----...._.._._....._..... _---- ------�--�----- ------ --------- ----------------._.....----------------------- - ---- .-.
�0.017]�PCTg�+0.0P24�PCT4)� �0.61]+0.00123�PCTj�� �O.OV](55.4�+O,OR2/(44.b)� �0.61]+0.00123(55.4)� N�
=10 DA =70 57.6 = 1,422 CFS � SAY 11,420 CFS Desi n Control Elev. �'!�?`�NTAIN OR IMPROVE 25 YR AND 100 YR BACKWATER ;---------.---------------------------------------------------------�---- ----------------------- ----------------------
-Qio._._ _ --------�- - ------ -- -----' ' -...-------- -- ---------- - --- --- -------'--'-' -'-- --... g .---._..._---�--- ---------------- ----------------- o;
�0.0189�PGT3�+0.0Y39(PGT4j� �0.606+O.OD130(PGT3�� �0.0189(55,4)+0.0239(dd.6�� �0.606+0.00130(55.4�� M� 2]� �Q�� FACE TO FACE .i�� �UT TQ QU �%�a
--Qzs--�Q- --DA =10 57.6 = 1,880 CFS ;SAY 11,880 CFS 9 _------------WA---_---__-_- Period ofRecords --_----_-.---_N�l+_-_---_--------------yrs. oc Recommended Width ofRoadway-_- --------..___.._-_�-------------------.T1---- Skew----------_----------.-
-- - ----- -- --- -- -- ---- .._....._ _ --- --- -------...----- - -- - - Ga e Station No.
�0.0196�PCT3�+OAI49(PCT4)� �O.d00+0.00135(PR3j� �0.0196(55.1)+O.p249(46.6�� �0.600+0.00135�55A)� m' Recommended Location IS o tream from GXIS i055 EXISTING LOCATION
-------------_ c.fs. Date _.--_...._.._..._..... Fre uenc � � U A�t D wn 5 ' tin C in
Qso--10 --- DA-. -- ----10 ------------------ 57_b------- - .=.2,249 CFS ; SAY 2,250 CFS WA WA WA ; ( P, � 9 9•----....-------------------------
-- ---- ----� - ----�--- - Max. Discharge .-- ---- --- 9 Y ----------- -- --
ar e
�0.02M�PCL�)+0.0258�PCT4� �0.594+0.00139�PCT3�� ��.02�2�55.Q+0.0258(Cd.6)� �0.594+0.00139(55.4�� LL Statewide TI6( ❑ R@ iona) Tier ❑ Sub-Re ional Tier �
Q,00=10 DA =70 _ 57_b = 2,624 CFS ; SAY 2,620 CFS Historical Flood Information: g 9
----- -------
--- - . .. . ..
�OA214(PGT3)+0.02]I�PCT4)� �0583+0.001l9�PCf3�� �0.02U�55A�+a.O]71(446)� �O.SB3+0001�9(55.4�� NEVER OVERTOP Period of a Benc ar is SPIKE IN. 15" MAPLE; -BL- STA.12+10_00, 95' RT OFFSET_._
Qsor70 DA =70 51.6 3,527 CFS ; SAY 3,530 CFS Date ..Elev. wA__.ft.Est. Preq. wf± ._yr,Source ._ (SCOTLAND CO. MAINT. ENG.) g . M-1, RAIL, _,_____ , . , . ._____._.._......
------ - --._------- -------�--- - - ------ - ---- --- ---....-------- ------- ------- y •
-- ---------- -- - --- � ----------- Knowledge .. rs �
FEMA DISCHARGE Hec RAS Q�� 2,1b2 CFS wA wq Period of ^, N 384880 ; E 1876896 ___ Elev. _..786.03'__, ft. Datum: ___NAVD 88 _
- ----.. _....- --- --- -- - - -- -- -._... ... --- --------- - ------ ---- --------- Date-- ._ Elev. -- ----ft.Est. Fr q -- -- Y urce . . ----..._ -----...__ --�---- - ---------y ' T r Crossi
e. WA _, r,So wp Knowledge . rs �,
Period of �� • NOT REQUIRED. OFF SIDE DEfOUR
NOTE: HEC RAS 100-YEAR DISCHARGE USED FOR FEMA COMPLIANCE. USGS DISCHARGES USED FOR NCDOT DESIGN WA WA WA WA WA a� empo ary ng _______________________,._.___..._.___.__._.____._.____.___._.__... _.___ _________. ..._._.
-------- - -------------------------------------- - -- -- ._...... - - --� --------- --------------- -----...- -- Date.-------- Elev.---------ft.Est. Freq. _..-----YcSource --------- --- - ------------------- Knowledge---- ---�• v�ii
v;
. ----_ .. . . . . . .. .. . . - --_ - _-- .. , -- - - - . --- --. . _..- ---- Historical Scour Info. : General._.WA ---ft. Contraction- - w�+--_-ft. Local_._.AYp. ..ft. ; ` --- --
OVERTOPPING SCOUR: (HEC 18, APRIL ZO�2� Channel Slope ___. 0.0008___fvft Source USGS_QUAD /SURVEY, Normal Water $urface Elev.. ,$3•Z' ____.__..._.ft. Z° �
- ------- - -------. _. . ... . - - --- : � �
CO%1TRACTI��1 $COUR Mann g n Left �:1? 0.07 g 0.72 PUB I HEDMDA�TA & m � ` - ���
. ---- ---�-- -- -K : . .... .. .... ._--- --------. . . . ... ... .. ... . . - --- - -------- - --- ------ - in 's : O.B. --- - --.Channel ._... ....._ Right O. .. . ------Source .,.. ... .- ------- ------ - '- '�'� �";
LIMITED DETAILED FEMA FLOOD STUDY ° �-�� s�;
Yz- Y ( / ] [W /W ] (EQN. 6.2� Q� : NAT. RUN R.S. 13079.94 Non-Encroachment a, , ;,;„�' � ,_. •
, i i_ z_ _____________ Plood Study/Status EFFECTIVE_DATE JULY 7,2074______ ..__._ YES " ��
��` �' ----- -- - -- - -- .. . . .. . ... . .. . . - -�--- Established� ---------- '
Ys= Y2 Yo EQN. 6.3 QZ � REVISED RUN R.S. 72833 BR U 2 �by �, =�§,
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- --- ---' - - . . 190.22' 189:90'
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�� s-, oev Non-Encroachment.. ft. Non-Encroachment ___ ft. n� -. �=--,.--., „�" "�
Yz- 5.03 [7430.61/364.bbj [23J26.6] ' W, : NAT. RUN R.S. 13019.94 (BOITOM WIDTH) @ Rrver Sfatwn 73020 � ���� ��
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Y�- 14.99 FT Wz . REVISED RUN R.S. 12833 BR U(BOTOM WIDTH) o � ': ,
- - -- - - - - - - - - . . . . ... ._ _. ._ _ . - -- DESIGN DATA z � m,
Ys= 14.96 FT - 5.83 Ff y: REVISED RUN R.S.72833.53 INSIDE BR D Hydrological Method_USGS SIR 2009-5158 (REGION 3& 4) ' �4 A
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Ys 9.16 FT y. NAT. RUN R.S.13019.94 - ----- Hydraulic Design Mefhod HEC RAS 41.0 _. ._ ---._ -------- --------- ---_-,-- --------- .. --.- ---___-
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Floods Evaluated: Freq. Q Elev. Backwater Bridge Openi� g Velocity o
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(Y��) (c.fs� (ft.) (k.) (f.ps. . �,
- ------ - -- ----- - -- - ---- ------_. @ River Station 10 1420 ----- ----788.8--- -- -- �'3- ... ___.._. 4.7 -------
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- - - - - - 12893.00 c
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----- - -� - -- --------- --------- --- - . .. .------ ---- --- � ------ --- -- --� - ------- - 100 2620 190.41 2.1 b.l N ,.,
------. . .- - - --. ..--- ------ ------ - --- --- - ------ --------- - ------- -�------ - --- ------- ...700__FEMA ---- 2162----- - ----789.68 -- - �`6 - - --- -- .5.6 -- ---- nni ENGWEERING � � �'
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W� � �`'� �'b-4 SCNAUB DRIVE, SUITE 7D0 0
..500_..-- ---- 3530..--- ----191_2------ --2'4--- --------8`2--------- Ra�ei�H.n�c2�sos : 9�:
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' ' _'___" '________ "'...._... . '_._" _"_""' ' '_"_"' '___"'_' _'_'__"_ __"___'_ _""_"' .._.. _"""" • ^ 9i9 85�-6608 . �•.
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25 YR �' r-s.,�:i �E �v�urvneeR: p-os�7 ,' ... ��� /O� •• ::
-_-_--,--__-_.._.._-_---------_-- WaterwayOpening Provided Belowflesign W.S.EIev.._421,4_s.f.,l00yrW.S.EIev...437,8,_s.f.Totql._431,8s.f., dj Designed by:__---�-_-.-�_�---------------------_------- /_ :�Q SEAL 9�•� '
---------- ._...._------------------------------------- ------ -- ------------- 2�
25 YR 25 YR Z; lCAREN A. HEPNER, PE Date ;/ _��_�Dl(P, ;_ �: g6 : z;�
- ----_--_ -__-___ ------------- ---------- - -----_---------_----_----_----.._.-------_-------,---..... Average Channel Velocity (Design)---3_�-----_f.ps. Average Overbank Velocity (Design)-.--_-�:5----------f.ps. �; Assisted by:..----ANDREW_T,NQ:1'[IN�Ht1M,_PE--_---,- ;�'. :� �
--- - --- ------ . .
DESIGN FOLLOWS SUBREGIONAL TIER GUIDELINES wp - wp � ,/ �% // / .�� � �
_.-----------------------------.---.----------------.----_._-------- ------------------- Computed Scour : Gene�al -------..,_----_ft. ContracFion .---OT-9_79------.ft. Local ------------------- ft• o Project Engineer : MELANIE Q_C.�IGUYEN, PE- --------- ✓%p��:•Q INEF;�'��J;' .
Is a Flaodway Revision Required? NO (MOA TYPE 26 - MEASUREABLE IMPAC�-------_--- -_ ------ --- _ �`n Reviewed by: ------�/�_S�'!_.__�J'�-'_.---�6_--�`�-��/�- J�'''a"�E���u �N``�~�