Underground storage

[hilly27]

I am trying to design an underground storage are for water detention. It will be connected to a dry detention basin that uses a discharge structure. How do I go about calculating the area of void space within a trench?

 

[LHA]

Clean Stone d50=1.5"-2.5" is commonly considered to be 40% void space.

Volume = L x W x depth x .4

Remember: The Chinese ideogram for “crisis” is comprised of the characters for “danger” and “opportunity.”
-Steve

 

[hilly27]

Is there a specific compaction that should be specified?