20190892 Ver 1_SR 1284 Timberlane Emergency Culvert Outlet step pool design_20190705

COUNTY- HENDERSON GPS: 35.3150 N
SR. NO.-. 1284 082.5965 W I
RD. NAME: TIMBERLANE DR.
PIPE STA..-
SITE NO.. I z
a
ROCK INI
PROTECI
SCALE. NTS
US ELEV, 86,9
I INV RT ELEV. 87.18
(I' BE OW GRADE LIN
GADE LINE
83'
extrapolated grade from
elevation shots
C/L
C/L
EL96,1
�y
4' BRANCH
-y
�j
elevation too
high when
culvert
surveved
INVE T ELEV, 86a87 W
W BE GRADE LIN ) DS ELEV
87.53
1'5"WIDE X 7'I" ■•��.
LUM STRUCTURAL FLAT �~
PIPE ARCH
36'L736"
two rock vanes and
backfill with mix rip rap
proposed
and natural streambed
streambed
material
grade
Approx. existing
streambed grade

SET HEADEA ROCK SADK. 1;3
■ID -Fry OT IOQ^1'CN NCR
SANKFULL Bl4K, STEP
IIEPTH 0.5`� - I
{+� 8
ED
W"KS pd VANE AIA SNUI/I n �
ROT BL SAPPED air, HAVE ANY ITlrF,5 I
SIEN IF IC,A.R"T SP.AGES
EXCAVATED —
POOL. TYP,
HEADER
KCK
FOOTER —
ROCK
ROCK GROSS YAHE
CtO7EaTILO� '^— POOL DRPTm
SECTION A -A
*57-.STONE
m"ER ROCK, "P.
SEE PROFILE FDR ELEVATION
6ED .
BACKFILL� TYP,
PST STDW, TYP.
FDITTER ROCK, TTP,
MoTEl
SEE ROCK CROSS WME
DETAIL FOR SPEIGIFICE STEP POOL DETAIL..
WOT TO SCALE
kd Tkt:
1) STEPS TO BE SHORT, FREQUENT, AND
GLDSELY SPACED,
2) POOL SPACIMD SHALL BE INVERSELY
MIDPORT1:OhAL TO STREAM SLOPE,
AYn nINFGTIY FNOPUP110NA4 TO
BANNTULL R11QTH,
S) POOL OEPTR9 AT SANICFULL ELEVATION
SMALL BE TYPICALLY 2 TO 3 TIMES
ttit•. m" iNay $TtF DkPTMS FT
BAHKFULL ELEVATION,
4) AVEQUATE hUMSER OF FOWFEI SOULIEM
TO BE USED IN ORDER TO HOLD EIP THE
BOULDERS AT I OF 3=P$ OYIISM
HIGH BRCRmYT� PlmM Rvilm .
S} STEP POOL OETTN MHOWLI M 2 TO 7
TIMES LUKFULL MEPTM.
NEARER I TY►.
MET HEADER ROCK SACD
I
3EE PROFILE FOR
A RINIRUM OF Sid N➢0TT1
1.-3
11I
1f3
ELEVATION
PA,O+1
OF THE FOIDTER MOCK
BANRFULL
BANKFULL
RAWFULL
— --
YR.9TM
'WIDTH
WIDTH
ry
-�
-'-77
PA,GFF664, TYP,
_ _ _
_
EYCAVATEO POOL
An
➢' IB1N,
�15F S'sO"E. TYP.MCKA
FOOTER ROCK, TYP,
IN VANE AN SII DULD
ROT H OAPPIP OR RAVI A"
EXtA4ATEp T11 ?"
S[GN[P[WUT #PALMPST
STONE rOR R15CR ilOf4# YAM
GDIR TRUCT iQBI
RE'OTE1[IILE,,i TYP.
►�{ / 7
ti ,may
i° 1
www I Lum
�6+POTCNTILI +�7C4 1 #L!A
a i
Ja—A
PDML TEE VANA➢BP INTO
HEADS SANKFULL ELEVATION
AO+rN FYEkA.wOER
FDOTIR POOL EXCAVATED PER �
QIRECTIGN OF E*CIIIEEA
ROC.T. A FLOW 44 TO 104 SLOPE
__ems
KEY IN PANIC rO MANK
RIND OF ®,O' AT AM
ELEVATION EOUAL T-0 �!
EMWULL OR 3LIONTLx BAOKFILL, I".. POOTEN BED
ko"ll �1 ROCKS
PLAN V I EW f63 STONE. 1". 2 RACKS IN VANE ARM SHOULD
MIN, CLO1'"mt , TYP, NOT ME SAPPED OR HAVE ANY
B[ONIFICARIT SPACES
SECTION IB-B
NOTES:
I) DEEPEST PRAT OF FOOL TO BE IM LINE WITH (THERE
` i 17 E DETAIL 1 N M TR.R TIES INTO BAKKFUCL
ROCK fQl 2j DO MOT UCAVATE CAR TOO USED
TO SD FDRTER BOULDERS,
POOLS
D-) GLAD "'A'� $TONE C.kN BlE IVIED TO REDUCE YDI06
E: ::1FOR S TiE P lP O V LS 4} ORP�ACT BACNFILL TO EXTEKIBPOSSIBLE OR AT THE
DIRECTION OF THE ENGINEER,
MDT TO TCALR 5) POOL DEPTH SHOULD BE 2 TO S TIMES &"!(FULL DEPTH,

To edge of right-of-way
- approx. 15' from
headwall
r
fA
tP
W
- - Aa-
step heights set
for max. 6"
water drops _ - -_
f -x
_-Rock weir steps constructed
with Class 11 rock or -=
-- comparable boulders - -
narrow channel/pools to about
with combination rip rap andew
natural streambed material,
7 5
r
..r � t � '� �psi. •�,a6 �Y�r-��� ,. '��'• `" �„