By the time I got out to take some photos of the progress, the guys had already planted flags all over the yard and started digging trenches for PVC pipes and wires.

The work team had already buried the pipes along the west side of the driveway.

Load of PVC on the trailer

They dug a big hole out front to connect everything to the main water line.

Main water line connecting point

Already-buried line along west side of driveway; they did a nice job of filling the trenches and tidying up after themselves

They put another line along the west property line.

They put flags of different colors all around the yard, but we didn't learn what the different colors meant.

Red, white and green flags in the front yard

I tried to document where all the flags were placed and hoped to go back later to learn what the colors of the flags mean.

Red flags for spray heads along the street

PVC pipe and a wheelbarrow full of connectors

I learned later the machine on the right was used to turn the dirt back into the trench before they tamped it down.

Connectors for every angle and purpose

I think the green lids cover zone controllers; our system has 22 zones.

They dug a trench around the curve of the south edge of the driveway and laid pipe there.