FIG3.5D_SEDPONDRISERPERFDRATEO POLYETHYLENE
DRAINAGE TU BfNG, DIAMETER
MIN. 2" LARGER THAN
DEWATERING ORIFICE.
TUBING SHALL COMPLY
WITH ASTM F667 AND
PASHTO M294.
CAP PROVIDE ADEQUATE
STR/APPING
".
_~_
CORRUGATED
- = METAL RISER {
_ I
-- 3.5 M1N.
- WAYERTIGHI'
== cOUPLIN~ ~K WELD
i 6" MIN. F~ - - -
i'..,..-- --J
18" MIN.
~
L CDNCRE i E BASE I
- --
- 2X R
SER
~
1
I DIP, MIN, --
~
I
f
IG ORIFICE, SCHEDULE
STUB MIN.
AS PER CALCVLATIONS
ALTERNATIVELY, METAL STAKES
ANd) WIRE MAY BE DSED TO
PREVE NY FLOTAT!DN