The Vegetation Clearance Blog

Using LiDAR to audit completed vegetation work: the one attribute a point cloud measures, the classification and timing errors it carries, the defect classes it cannot see, and what has to be on the face of a LiDAR finding before it can fail a span.

What the contract and the QC standards actually say about a span that failed audit: who goes back, who pays for the trip, what clock the correction runs on, and who still owns the deficiency when the state asks.

What independence means when the company grading a span also employs the crew that trimmed it: what California requires, what the published utility standards do and do not say, and the contract terms and record fields that make the grade defensible.

What a utility's own vegetation QC standard does on top of GO 95, PRC 4292 and PRC 4293: the five documents PG&E publishes, the second clearance number they grade, the two words they use for a failed span, and how to tell whether the copy you are holding is still in force.

Why a vegetation QA/QC audit runs on a monthly interval and goes back to the crew the following morning: what sets the interval, what a month of delay costs in evidence, and which findings are not allowed to wait for the next meeting.

How a QA/QC auditor grades the closure of a vegetation work unit: what the status field is asserting, which rule sets the content of a completed work record and which work it never reaches, and the evidence a closed unit has to produce when the state asks for it.

How a QA/QC auditor grades the ANSI A300 line on a utility vegetation audit: which edition the contract named, which clauses are written as shall, where the specification and the standard disagree, and who decides when they do.

How a QA/QC auditor grades what a line clearance crew left on the ground and what it did while it was there, which document each criterion comes from, and why most BMP failures leave the site before the auditor arrives.

How a QA/QC auditor measures the clearance a crew left behind, which number the span owes, what the conductor was doing when the reading was taken, and what the entry has to contain to still mean something a year later.

How a QA/QC auditor decides whether a crew performed the trim type that was prescribed, what evidence settles it tree by tree, and who owns the finding when the two do not match.

Build a defensible vegetation QA/QC plan: define the lot, set ISO 2859-1 or ANSI/ASQ Z1.4 AQLs, know when 100% inspection is required, and record the draw and results.

Set signer authority on vegetation work, state exactly what acceptance attests to, and make e-signature and audit trails defensible for internal and regulator reviews.

Scope the audit on one span, name the evidence to collect, grade findings, and move them into CAPA with dates that stand up to a regulator or an internal review.

Plan, work, audit, report. The loop Aeri Resources runs every cycle, and why the record falls out of how the work is done rather than being written up afterwards.

Every unit of completed work is checked against the same six criteria, recorded per unit, and reviewed with the crew the following day. Here is the list.