Backfilling the South Trench

It was a grueling day today as Izzy and Bryan worked on backfilling the South trench (in front of the house).  Ryan Reyna and Nik helped for a couple hours, which was very much appreciated.

Underground Infrastructure

We have a lot going on in our trenches around the house.  The contents of the trenches are all different.  Here is a brief summary of the trench contents:

  • 4-inch ABS sanitary sewer drian pipes on the West side and South sides of the house
  • 4-inch ABS perimeter drain pipe that takes water from the seven (7) roof downspouts and various ground drains to the underground water cistern
  • 2-inch PVC electrical conduit from the East Mechanical room to the generator pad
  • 1-1/2 inch PVC electrical conduit from the East Mechanical room to the swimming pool equipment pad
  • 3/4-inch PVC water pipe for fresh water to the swimming pool equipment pad
  • 1-inch PVC perimeter water pipe for irrigation water to the six irrigation manifolds
  • 1-inch PVC conduit for cables to connect and control the irrigation manifolds in six locations
  • 1-inch PVC conduit for proprietay cables for the natural gas powered generator
  • 1-inch PVC conduit for proprietay cables to control the swimming pool and spa equipment
  • 3/4-inch HDPE connecting the U-tubes in the 25 vertical concrete piers in four sections of 12 U-tubes each
  • 1-1/4 inch HDPE supply and return lines connecting the two geothermal ground loops
  • 2-inch HDPE supply and return lines to the swimming pool and swimming pool equipment pad
  • 2-inch HDPE natural gas line to generator and swimming pool equipment pad

Until the complete ground loop system is pressurized and tested successfully, and then inspected by the City of Monte Sereno, we cannot backfill the East, North and West trenches.  Similarly, we cannot backfill teh Swimming Pool and Generator trenches until the natural gas supply connections have been inspected.

The only trench we could backfill is the trench on the South side (in front of the house).

Except for the very West side and very East side, Izzy and Bryan backfilled and compacted the soil in this trench today.  Bryan will have sore muscles tomorrow.

The open trench at the South West corner of the house. About 8 linear feet of this trench can be backfilled (it is still open).

The open trench at the South West corner of the house. About 8 linear feet of this trench can be backfilled (it is still open).

West trench looking North. Note the 4-inch black ABS pipe stubbed for downspouts from the roof drains, the 3/4-inch HDPE connecting the U-tubes in the vertical concrete piers, the three 1-inch conduits for irrigation controls and the 1-inch PVC perimter pipe for irrigation water.

West trench looking North. Note the 4-inch black ABS pipe stubbed for downspouts from the roof drains, the 3/4-inch HDPE connecting the U-tubes in the vertical concrete piers, the three 1-inch conduits for irrigation controls and the 1-inch PVC perimter pipe for irrigation water.

North West corner of the house, showing where the ground loops will be combined in an underground vault. Also, the conduit for the control wires (low voltage) will terminate inside the vault where they will be aggregaged and then enter the house in a single conduit.

North West corner of the house, showing where the ground loops will be combined in an underground vault. Also, the conduit for the control wires (low voltage) will terminate inside the vault where they will be aggregaged and then enter the house in a single conduit.

Trench going to generator and swimming pool equipment pad. This is a full trench, with 4-inch ABS drain pipe, four 1-inch PVC conduits, 3/4 inch water line and a 2-inch HDPE natural gas line and 2-inch HDPE hot water return line to swimming pool pad.

Trench going to generator and swimming pool equipment pad. This is a full trench, with 4-inch ABS drain pipe, four 1-inch PVC conduits, 3/4 inch water line, 1-inch irrigation water line, 2-inch HDPE natural gas line and 2-inch HDPE hot water return line to swimming pool pad.  The two 1-1/4 inch black HDPE pipes are the supply and return lines for the ground loops on the East side of the house. 

Trench going around North West corner of pool, going to the generator pad and swimming pool equipment pad.

Trench going around North West corner of pool, going to the generator pad and swimming pool equipment pad.

New short trench going to swimming pool for 2-inch HDPE suction line to carry cold water from the swimming pool to cool the house.

New short trench going to swimming pool for 2-inch HDPE suction line to carry cold water from the swimming pool to cool the house.

Izzy compacting the backfilled trench at the South East corner of the house. We compacted every six (6) inches.

Izzy compacting the backfilled trench at the South East corner of the house. We compacted every six (6) inches.

Izzy continuing to compact the entire trench at the South side of the house (front).

Izzy continuing to compact the entire trench at the South side of the house (front).

Backfilled and compacted trench at the front of the house. Done ... for today.

Backfilled and compacted trench at the front of the house. Done … for today.

Unfinished part of trench at East side of front of the house. It would have been nice to have backfilled this small section today.

Unfinished part of trench at East side of front of the house. It would have been nice to have backfilled this small section today.

Entry to house is looking much, much better now.

Entry to house is looking much, much better now.

Leave a Reply

Your email address will not be published. Required fields are marked *