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→Backfill Granular and Pipes (SPC)
===Backfill Granular and Pipes (SPC)===
===Backfill Granular and Pipes (SPC)===
'''Storage Reservoir'''<br>
'''Storage Reservoir'''<br>
[[File:Union Tpke 176th St td (2020-12-21) 04 - NYCDEP Rain Garden.jpg|400px|thumb|right]]
INSERT YOUTUBE LINK: https://www.youtube.com/watch?v=Ng_s2ErvPqk&t=58s <br>
The storage reservoir layer holds and directs the stormwater into the underlying/native soils. The LID facilities, if applicable, should be filled with uniformly graded, washed stone (20 mm – 50 mm) that provides 30 to 40% void space.
Construction steps:
#Backfill material from outside of the LID facility to avoid compaction and sediment entering the facilities. Use a slinger truck if possible.
#Place the material to the elevation and thickness as per the design specifications.
Key Inspection Points:
*Material arrival to the site:
**Check chain of custody
**Verify it meets specifications as per design
**Verify no debris or fines within the aggregate (it’s a washed stone)
*Granular material should be 19 - 50 mm clear stone or as per design. See [[Aggregates]] for further details.
*Installed aggregate is at the correct elevation as per design.
Mistakes to Avoid:
*Accepting material that does not meet design requirements and specifications.
*Installing material with heavy equipment from the inside of the LID facility
*Installing frozen aggregate. Do not install frozen aggregate
*Leaving heavy equipment (excavator) for long periods of time within the LID facility.
For more information on the storage reservoir, see the page: [[Reservoir aggregate]].
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