Monday, November 30, 2015

Culvert Replacement #12

Finally, with one week of dry weather, we have been able to complete the replacement of the large culvert under #12 fairway.  While the replacement went relatively smooth, it was not without some issues.
Digging across #12 fairway.

Digging to bedrock.
Some irrigation will need to be rerouted.

The first issue was a previously unknown sewer junction and manhole that was found in the middle of the fairway.  After much research and discussion with the HOA, it was determined that this junction box was put in when the development was built and was never used.  As a result, we filled it in and covered it up.
Manhole and sewer junction in #12 fairway.

Installing a 30 inch drain culvert.

The other issue that came up was that the new pipe had an outside diameter about 8 inches larger than the old pipe.  With the pipe sitting on bedrock in a few locations, the new pipe sat at or near the surface.  To alleviate this problem, we will be adding addition fill dirt to those locations so that we get at least 10 inches of cover over the new pipe.
The new pipe was installed next to the old pipe so that water could continue flowing.
Covering the new pipe.

With this pipe now replaced, we will start replacing a second pipe on this hole as soon as the weather cooperates.  If you guessed, its raining right now.