In February 2014, a culvert that carries water underneath Partrick Road west of Napa collapsed.
The culvert is about 2.2 miles west of Borrette Lane. If the road failed, property owners west of
the site would be trapped; Partrick at that point is one way in, one way out.
The culvert underneath Partrick Road carries runoff.
The corrugated metal pipe had rotted and collapsed,
threatening the stability and integrity of the roadway,
as well as increasing the potential for erosion and
localized flooding of the roadway
Within a few days, Public Works had replaced the rotted 18" corrugated metal pipe underneath the road
with a 24" corrugated metal pipe and backfilled the space around the pipe with concrete slurry.
Intake (uphill) side: Concrete slurry holds the new
pipe in place and adds to the stability of the roadway.
Outflow (downhill) side: Large rocks provide