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1800 GALLON PRE-CAST PERFORATED DRYWELLScale: 12"=1'-0"CastingAdjust to GradeGradePvm't.10" Reinforced Lid10"18" Backfill - INDOT No. 8 Stone AggregatePrecast Perforated Dry Well Section4"8"4"Wall9'-4" Dia.5'-4"6'-2"7'-8"2'-0"All Sections Wrapped w/ Non-Woven Geotextile Fabric,Trevira 1114, Amoco 4545 or Equal Prior to Placement.Joints to Have a 12" Overlap6"Min.6"Reinforcement2'-0"INDOT No. 53 CompositeAggregate for UndercutPERFORATED PIPE TRENCH AND BEDDINGScale: 1" = 1'-0"Pipe Dia.6" Min.1'-0"(Typ.)Fully Perforated Storm Sewer PipeINDOT No. 53 Composite AggregateApplied to Top 4" for Line and GradeNonwoven Geotextile Fabric@ 4 oz./syd forFull Aggregate WrapBackfill INDOT No. 8 StoneDia. + 24" Ea. Side1'-0"Min.NOTES:1. Overlap requirements between panels shall be 2' minimumfor either end to tend or side to side.2. Aggregate backfill shall be mechanically tamped in 12" layers.Hand backfilling will be used adjacent to areas of theperforated pipe.INDOT No. 53 Composite Aggregatefor Line and GradeK2'-0" OverlapMin.SIGNATUREDRAWN:CHECKED:DATEVERTICAL SCALEDATESURVEY BOOKHORIZONTAL SCALEREVISIONSPROJECT NUMBEROFSHEETSCITY OF SOUTH BEND, INDIANAPOTAWATOMI ZOOPARKING LOT EXPANSIONCONSTRUCTION DETAILS GDHMJGAS NOTED SEPTEMBER 2021120-014915A9B9LEGEND:165 #/sys HMA, Type "B", Surface on275 #/sys HMA, Type "B", Intermediate on6" Compacted Aggregate No. 53 onSubgrade Treatment Type IIIKDRYWELL NOTES:1. All A layer of geotextile fabric, Propex 4545 by Amoco or approved equal shall beplaced between the drywell and the No. 8 aggregate and shall line the excavation. Anyfabric joints shall have an overlap of 18". The No. 8 aggregate, the geotechnical fabriclayers and the frame and grate to be included in the cost of the drywell.2. To ensure proper infiltration into the soil, after installation of the drywells andbackfilling with the No. 8 aggregate, the contractor will surcharge each drywell with aminimum of 3,000 gallons of water prior to any pavement placement. Surcharge watershall be applied at a rate that will completely fill the drywell.3. Where no casting is req'd. provide concrete removable lid for the 2' dia. opening.4. In grass, an open grate casting shall be Neenah R-2561-A or approved equal.5. In pavement, an open grate casting shall be Neenah R-2390, EJIW 1205, or approvedequal.PERFORATED PIPE NOTES:1. All bedding and initial backfill shall be installed in 4" to 6" balanced lifts andmechanically tamped.2. Bedding material shall be hand placed around the haunch and sides of the pipe toensure proper compaction and complete filling of all voids.3. Back-fill - in streets, allys, sidewalks or driving areas:a. 6" Layers, solidly tampered to sub-grade of street base.b. Backfill will be granular material with less than 15% passing the No. 200 Sieve.c. Backfill shall be compacted to 95% standard proctor.4. Back-fill - in easement or open areasa. 12" layers solidly tamped.b. For backfill in easements or open areas native material will be acceptable.5. This bedding detail shall be used for the installation of all flexible storm sewer pipematerials.No.11900865P R O FESSIONALENGINEER PAULIN HAKIZIMAN A9/16/21