Thursday, April 20, 2017

Digging up the Central Backyard, Part 3

Having finished the rebuild of the main irrigation water line, and Zone 5 water supply, we return to the excavation of the central backyard.  We have dug up the portion just next to the sidewalk; we still have the portion that goes back to the rear fence.



First, we dig back along the established lawn line to the electrical box.  Then we move West a bit and do it again.



Instead of continuing to dig all the way back, we can dig all the way across.  Doing this exposes a layer of rock.



And continued to dig along the edge, we expose more, and more of this layer of rock.



Using the pry bar, I can separate this into 4 large pieces.



Then, using the jack hammer, we can break these into pieces that we can manage.



We can then roll these to the side, and clean up the dirt and debris that is left.



Several hours of moving these out of the pit and to the front, to be hauled away.


video


produces a big empty pit.



From this, we keep digging back closer to the fence, and find several more, smaller rocks. plus an abandoned PVC sprinkler line.



Wednesday, March 29, 2017

Leveling the backyard, part 1

As we have excavated the central back yard, we piled up the dirt on part of the Bottoms that has already been excavated.



But as we got more and more of the central back yard dug up, and particularly after lowering the main irrigation water line, it seemed we could move the dirt back to where it will eventually be.  So we took some time to dig all that dirt up out of the Bottoms


 and move it to the ditches that were the result of our digging, levelling off the back yard, more or less.



This "level" is still several inches below where the lawn level will eventually be, still leaves some substantial ditches, adjacent to where we will be continuing to dig.



But it gets things to the point that we will begin to cover up things we may eventually need to find, specifically with the underground irrigation system.

The control value for Zone 5, which controls the sprinklers for  the Iris bed and the Herb Garden beds, is just off the sidewalk.  It's about 7 inches from the sidewalk and 11 inches down from the level of the sidewalk.



The main irrigation water line  runs way down at bedrock, until it gets to the River of Rocks, where the River of Rocks terminates at the back sidewalk.  Then it comes up to a more "normal" depth and continues around the house.  It rises up to 8 inches below the level of the River of Rocks, and the sidewalk, and is 13 inches away from the sidewalk.  (It basically runs parallel to the sidewalk, 12 to 13 inches away from the sidewalk, for the entire length of the house.)



The valves for Zones 6 and 7, which will be used to water the central backyard and the Bottoms (respectively), and buried in the Bottoms, just off of the Rock Retaining wall.  One of the rocks in the Retaining wall is more or less rectangular and sticks up an inch or two above the top of the rest of the wall.  From the top of that rock, it's 21 inches down to the valve covers and 14 inches away from the Retaining wall itself.




Wednesday, March 22, 2017

Rebuilding the Front Porch Planters

We have three large planters on the front porch.  Linda got these years ago and has been trying to keep plants growing in them.  But they get limited sunlight -- on the North side of the house -- and limited water -- under the front porch, so no rain, they have to be hand watered.  And then in the winter, the North wind blows and everything freezes.

So Linda has decided to rebuild these.

First we took out all the existing (mostly dead) plants, and then dug out the soil to get an empty planter.





We made sure that the two drainage holes were open.  Then covered the bottom with a weed barrier, to keep the soil from leaking out, or clogging, the drainage holes.


Next, Linda made up a mixture of Perlite and Coir coconut fiber and filled the bottom half of the planter with that.


This is to provide a base that is good, permeable, soil.  The coconut coir fiber comes in these compressed blocks and has to be soaked to allow it to expand and be worked.





On top of this base, Linda put pots with the plants she wants and then put a decorative layer of moss around them.


The hope is that this will allow the plants to be easily replaced if need be, and to be brought into the garage if it gets too cold.

Repeat for all three of the planters.


Saturday, March 18, 2017

Digging up the Central Backyard, Part 2

With the irrigation lines re-built, we continue digging.  The current focus is to dig up and move the Yucca plant.


As we dig to get to the Yucca plant, we mix the dirt with leaves and use it to bury the new irrigation lines.


and keep digging.



until the Yucca plant is completely isolated, and finally falls over.


It was sitting on top of a big pile of really rocky dirt.  Separate out the rocks, add in leaves, and this area is cleaned up.  Move the Yucca out of the way, and we have finished this section of the central backyard.




Wednesday, March 1, 2017

Lowering the Main Irrigation Water Supply Line

Back in November, 2012, we excavated the East side of the backyard.  As part of that, we exposed the main irrigation water supply line, and to make sure it was well out of the way, we lowered it all the way down to the bedrock.  We had to raise it back up to interface with the existing pipe where we were not (yet) digging.


Now we are digging back to that point, from the other direction.


And today, we dug all the way over to where the pipe drops.



The objective is to dig out all the dirt and rock under the existing pipe, down to bedrock, and then re-do the linkage to the pipe on the East side to lower this section that goes along the center of the yard.

More digging exposes not just the main irrigation supply line, but also the line for Zone 5, and an old (unused) PVC line (which we have now removed).


 Using the jack hammer to break up and remove the rock that has been exposed, we can excavate all the way down to bedrock.


Looking at the far end of the trench shows how the previous work had to "step up" to connect with the un-excavated main supply line:



The first step is to remove all the old PVC pipe.   Then we lay new PVC pipe and couple it directly into the main water supply line. ($34.38 at Home Depot for PVC pipe and pieces).



This is a new 1.5 inch Schedule 40 PVC pipe.  It runs along the ground until it gets to the valve for the Zone 5 beds.  At that point we "tee" off to a 1 inch PVC line going up.


We continue along at ground level until we get to the end of the pit, next to the end of the River of Rocks.  At this point, we must once more "step up" to connect to the rest of the (unexcavated) main water supply line as it continues around the house.



Since both ends of the pipe are fixed, we have to do something to finish the last connection.  We used an NDS 1.5 inch Pro-Span Coupling, which cost $20.65.



From the valve box for Zone 5, we ran 3/4 inch PVC back to the Iris bed and to the Herb bed.


Since this was only 3/4 inch PVC, it was more flexible and we were able to use standard couplings.


Sunday, January 29, 2017

Digging up the Central Backyard, Part 1

With the wall around The Jungle finished, we can turn our attention to excavating the Central backyard.

We start by continuing the work that was necessary to do the wall, particularly digging all the way to previous work, behind the Jungle and up to the fence.


This is pretty simple work -- dig down to bedrock, separating the rocks (which we haul off) from the dirt.  Mix the dirt with leaves to increase the amount of organic material in the dirt.  Put the dirt to the side, out of the way of more digging.

 
We can't dig too far to the left, since we need a pathway to get from the house to the compost pile behind the Jungle.  So we chip away at the edge of the yard


until we realize we need to be more organized about this.  That leads us to draw a couple of lines on the ground.


and we will take off all the dirt to the right of the line, up to the sidewalk, and then start digging across the yard, next to and parallel to, the sidewalk.


all the way over to the yucca plant and the part of the yard that is finished. This is roughly a rectangle 16 feet long and 10 feet wide.

With that decided, we can just start digging.  This takes all our tools -- shovel, hoe, rake, the barrels of leaves, and produces lots of rocks.


and day by day, we get more digging done.


This is exposing another layer of rock that we will need to take out.


Another day gets us all the way to the sidewalk.


Four days of digging, breaking up rock, and clearing it out, gets us to a more finished situation here.


Now we turn to dig across the yard.   First we dig one section.



and then widen that with another section.


and another.



until we have most of it dug up.  There is still a strip next to the sidewalk that is protecting the main irrigation water supply line.



And we stopped before going all the way to the finished lawn because we have hit a very large hole in the rock.  There is an area which was previously dug up where the shin oaks were before they were moved to the South-East corner of the backyard.  We moved them back in February 2011.  So this is a different type of yard to dig up from what we are working on -- dirt on top of rock.  In the section that is yet to be dug up, it should be just dirt.

So for this section, we start with a layer of rock.


and using the jackhammer, we reduce this to smaller pieces of rock.



A couple of days of cleaning up that leaves still a couple of large rocks



which again, with the help of the jackhammer can be reduced to more manageable chunks.


and then cleaning that up



leaves a big new clear area to continue work from.

Next we turn back to the strip going back to the fence.





Note the section to the left of the white PVC pipe, going from the corner back to the fence.  After a few days of digging, pulling out the rock, mixing the dirt with leaves, we have