20201297 Ver 1_West Duncan Street Impact Map_20201208

t IN
// \ \ \\ \\\%\ \ \TEMPORARY STREAM R N
>Q v
\ \%\\ \\; CHANNEL IMPACT Z
\ \ \\\\ \\ ±19LF; 140SF - • / / , /
/ O L+ d
\\\\\\;\ /� ' EXTENT OF PRIOR STREAM IMPACT / / / / V • F. p
y
\ `� ELEVATION: 128.4 / �/ / / 2 : :� C d
\ \\\\ ` (PER FIELD VISIT W/NCDEQ) / / / Z W�
TEMPORARY RIP RAP PAD ;__ - / /
(8'X 8'X 12" MIN DIA.)_� _.�;.�° �`V� .: // / % / / / t ��
v .►:•,pok laity, I / / /
\v vA ..}►ltv .� w...o. 0�J
SANDBAG ►:fit - -�� Wp;��,L�•� / / / / / mom
COFFER DAM �� �y S.���'�:��'v �� / / / / ROAD SURFACE 0.0)Z
". _ itteoli�ftalr % / / 96"LOW
vV �P� � � � e 0"°"� t / TEMPORARY FLEXIBLE HOSE HEIGHT AND LENGTH OF FLOW PIPE
\ \ •-ittp_ire•SO SO SO SOeirk1' �;s / / BOTTOM OF PIPE SET
�_.,, i RETAINING WALL VARIES
ir.V ) / / irilr,r. ,, ,
\ ii. ^�f ~� ~� ~� ~� �� ^�' ^",,�,,'"' / 96"HIGH 12" BELOW LEVEL OF
\ I /zYl !'�j•j•j•j•j•-`1 ,4 .14:1: ( I FLOW PIPE NATURAL STREAM BED z
tee* r� r� r� r� .� .�' +„,/ / EXISTING GROUND
I \ -..�i . 4..��.G.�G.��.�alv..o.U�I�+iU / r
. .
L,_
It3j
�0.�0.�0.o0.t1,,2'1' / /z_: ,:b I133_MI f
���_�� �..• 134_
.tiVe'���� 135_ LEVEL MOF NATURAL
�138I �J�,.0 y. 113 L 2'TALL CONCRETE SILL
3)------- \
�139
___ _____ 9-- INSTALLED ON EACH (ELEV: 132.1)
N \ END OF PIPE
- \ \ (TOP ELEV:133.1) PIPE INVERT
(ELEV: 131.1)
WIN62 LF-(2)96" • - N \ i-
62 LF-(2)96" RCP @ 3.4% _ _ _ _cam,/ NOTE:CONCRETE SILLS TO BE w
RCP @ 3.4% _ BOLTED/ANCHORED TO CONCRETE LU
nilill _ - -- - - HEADWALL I-
CULVERT CROSS SECTION (J') o a
_ -- (NOT TO SCALE) Z Z Q
WEST DUNCAN STREETalli \ U z 2
o 1-
-\,-- aft ins \ NOTE: Z z Q
/ \ A TEMPORARY COFFER DAM IS TO BE INSTALLED ON THE UPSTREAM PORTION OF THE STREAM D J 0_
/a/ - - CHANNEL TO ALLOW FOR ROAD CROSSING AND CULVERT CONSTRUCTION.FLOW FROM EXISTING 0
\ STREAM SHALL BE PUMPED AROUND ROAD CROSSING DURING CONSTRUCTION ACTIVITIES SO
/ NEW PIPES MAY BE INSTALLED IN DRY CONDITIONS.SEDIMENT LADEN WATER WITHIN WORK I-
AREA SHALL BE DISCHARGED VIA SILT BAG.UPON COMPLETION OF THE ROAD CROSSING,THE
. . • • • . . 1111111LIMMIMMimumwCOFFER DAM WILL BE REMOVED AND THE STREAM WILL BE RESTORED TO ITS ORIGINAL LJJ
III DIMENSIONS.
- •• SANDBAG I l ` --
=1ao �_ COFFER DAM '- -'
.. - - _ -------====== STREAM IMPACTS
- ' _ _ / PROJECT NO:
i �4% j%y I / / TYPE OF AREA SQ. FT. AC. LENGTH(LF)
le..............=�� /
i/ TEMPORARY 349 .008 41
r , i / , / /
`/ . / , / / SCALE:
135 i 1U —i ._//\ ^ •, / ,// // / // 1"=20'
\�N \ /
TEMPORARY STREAM ,'N . . - EXTENT OF PRIOR STREAM IMPACT DATE:
CHANNEL IMPACT FUND ` -� \\ I ELEVATION: 132.3 2020-12-02
±22 LF;209 SF ^\\\\``yy \;{ I (PER FIELD VISIT W/NCDEQ) 20 0 10 20 40
r I \\1` ' \ \\11 I , / — � SHEET NO:
SCALE:1"=20' E-1 J