HomeMy WebLinkAbout217.301.CONDITIONS OF USE
1.1.PIPE SLOPE DRAINS SHOULD BE USED WHEN A TEMPORARY OR PERMANENT STORMWATER CONVEYANCE IS NEEDED TO MOVE
WATER DOWN A STEEP SLOPE TO AVOID EROSION.
1.2.PIPE SLOPE DRAINS MAY BE CONNECTED TO NEW CATCH BASINS AND USED TEMPORARILY UNTIL ALL PERMANENT PIPING IS
INSTALLED.
1.3.PIPE SLOPE DRAINS MAY BE USED ON ANY SLOPE WITH A GRADIENT OF 2H:1V OR GREATER AND WITH AT LEAST 10 FEET OF
VERTICAL RELIEF.
1.4.PIPE SLOPE DRAINS MAY BE USED TO DRAIN WATER COLLECTED FROM AQUIFERS EXPOSED ON CUT SLOPES AND CONVEY IT TO
THE BASE OF THE SLOPE.
1.5.PIPE SLOPE DRAINS MAY BE USED TO COLLECT CLEAN RUNOFF FROM PLASTIC SHEET COVER AND DIRECT AWAY FROM ANY
EXPOSED SOILS.
1.6.PIPE SLOPE DRAINS MAY BE INSTALLED IN CONJUNCTION WITH SILT FENCE TO DRAIN COLLECTED WATER TO A CONTROLLED AREA.
1.7.PIPE SLOPE DRAINS MAY BE USED TO TEMPORARILY DIVERT SMALL SEASONAL STREAMS AWAY FROM CONSTRUCTION.
1.8.PIPE SLOPE DRAINS MAY BE CONNECTED TO EXISTING DOWNSPOUTS AND ROOF DRAINS USED TO DIVERT WATER AWAY FROM
WORK AREAS DURING BUILDING RENOVATION, DEMOLITION, AND CONSTRUCTION PROJECTS.
1.9.PIPE SLOPE DRAINS MAY BE ROCK-LINED DITCHES OR OTHER PERMANENT, NON-EROSIVE CONVEYANCES USED TO CONVEY
RUNOFF DOWN STEEP SLOPES THAT ARE NOT STEEP SLOPE HAZARDS.
2.DESIGN AND INSTALLATION SPECIFICATIONS
2.1.THE MAXIMUM DRAINAGE AREA ALLOWED FOR ANY SIZED PIPE IS 10 ACRES. FOR LARGER AREAS MORE THAN ONE PIPE SHALL BE
USED OR A ROCK LINED CHANNEL SHALL BE INSTALLED.
2.2.THE SOIL AROUND AND UNDER THE PIPE AND ENTRANCE SECTION SHALL BE THOROUGHLY COMPACTED.
2.3.THE FLARED INLET SECTION SHALL BE SECURELY CONNECTED TO THE SLOPE DRAIN AND BE FUSED OR WELDED, OR HAVE
FLANGE-BOLTED MECHANICAL JOINTS TO ENSURE A WATERTIGHT SEAL.
2.4.SLOPE DRAINS SHALL BE CONTINUOUSLY FUSED, WELDED OR FLANGE-BOLTED MECHANICAL JOINT PIPE SYSTEMS WITH PROPER
ANCHORING TO THE SOIL.
2.5.WHERE THE SLOPE DRAINS CROSS STEEP SLOPE HAZARD AREAS OR THEIR ASSOCIATED BUFFERS, THE INSTALLATION SHALL BE
ON THE GROUND SURFACE. ANY AREA DISTURBED DURING INSTALLATION AND MAINTENANCE MUST BE IMMEDIATELY STABILIZED.
2.6.RE-ESTABLISH COVER IMMEDIATELY ON AREAS DISTURBED BY THE INSTALLATION.
3.MAINTENANCE STANDARDS
3.1.THE INLET SHALL NOT BE UNDERCUT OR BYPASSED BY WATER. IF THERE ARE PROBLEMS, THE HEAD WALL SHALL BE
APPROPRIATELY REINFORCED.
3.2.NO EROSION SHALL OCCUR AT THE OUTLET POINT. IF EROSION OCCURS ADDITIONAL PROTECTION SHALL BE ADDED.
NOTES:
DIKE MATERIAL COMPACTED
90% MODIFIED PROCTOR
CORRUGATED METAL, CPE,
OR EQUIVALENT PIPE
DISCHARGE TO A STABILIZED
WATERCOURSE, SEDIMENT
RETENTION FACILITY, OR
STABILIZED OUTLET
12" MIN.
STANDARD FLARED
END SECTION
INLET AND ALL SECTIONS MUST BE
SECURELY FASTENED TOGETHER WITH
GASKETED WATERTIGHT FITTINGS
INTERCEPTOR DIKE
INTERCEPTOR DIKE
PROVIDE RIPRAP PAD OR
EQUIVALENT ENERGY DISSIPATION
PIPE SLOPE DRAIN
STD. PLAN - 217.30
PUBLIC WORKS
DEPARTMENT
APPROVED:
DATEGregg Zimmerman
Public Works Administrator
UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS)
DocuSign Envelope ID: 6EECF5B6-602A-4E4A-B436-A317AA638878
9/28/2018 | 9:45 AM PDT