We completed installing our CUDO cistern by 2:30 pm today. The pile of dirt is covered and we’re ready to celebrate the arrival of 2010!
Completing the System
We needed the material to complete wrapping the exterior of the CUDO frames and that was being shipped from Los Angeles via UPS. Gary Jones was on site first thing in the morning, preparing the folds in the material so the last piece would fit on perfectly when delivered.
After the material arrived, Doug Allard wrapped the three CUDO frames that sit on top of the cistern (for the inlet, irrigation pump, and outlet). These three frames, once wrapped, will sit on the other 64 frames making up the cistern.
Once Gary and Doug were finished, the system then was put together. We sealed the joints with the prescribed tape and our Graniterock mix arrived.
We ordered a one-sack mix of controlled density fill (CDF) with a four-inch slump. This mix goes around the perimeter of the CUDO system – between the membrane material and the earth. Using the CDF allowed us to avoid compacting the earth with a jumping jack and reduced the amount of soil we had to remove. We ordered 4.0 cubic yards of CDF and used the remainder on top of the CUDO cistern.
As we put the CDF in, we went around the perimeter several times, filling the void partially on each pass. This was so the pressure would be even and not push the CUDO frames to one side without it being anchored in place.
Once the CDF was around the entire perimeter, the remainder went on the top. Then, Jose, in the excavator, started sprinkling some soil on the top until we had a layer of approximately 6 inches. Then, we used shovels and a vibra-plate compactor to spread the soil and compact the dirt evenly over the CUDO cistern. Then, Jose spread more soil in six inch lifts and we continued compacting.
When we reached the top of the three CUDO frames on top of the cistern, we removed the circular covers and used caulking to put the vertical pipes that will go to the surface. Jose spread more dirt in six-inch lifts and we continued compacting with the vibra-plate compactor.
Done! Our underground cistern is in place.
The Kristar team left and Jose continued to clean up the site with the excavator. The moved the remaining dirt into a neat pile so it can be used to backfill the remaining voids at the front of the house and will be easily accessible with a Bobcat. Also, he moved the stump to the front of the yard so it can be removed.
We’re ready to celebrate the arrival of 2010 – cheers!