Enhanced Vegetation Management: what the term covers on a scope of work
Enhanced Vegetation Management is a utility program name, not a regulatory category. No California statute or general order defines it. What it covers is set by one utility's approved wildfire mitigation plan: a clearance target above the legal minimum, an area, a unit of work, a tracking ID, and a plan revision date.
In February 2023 the Public Advocates Office asked Pacific Gas and Electric Company for its Enhanced Vegetation Management workplan for 2023, with circuit segments as rows and EVM miles in a column. PG&E's answer was two sentences: "The EVM program concluded at the end of 2022. There is no EVM workplan for 2023."
The same answer came back for 2024. At Southern California Edison the equivalent work still happens, but it stopped being a separate program, and the tracking ID that used to identify it now means something else. A scope of work that says EVM has not yet told you what you are pricing.
Enhanced names a program, not a regulatory category
Energy Safety does not define Enhanced Vegetation Management. Its wildfire mitigation plan template asks each electrical corporation to name its own inspection activities and then describe them. The instruction for the vegetation inspection summary table in the 2026-2028 Guidelines, reproduced above the utility's response in SCE's filed plan, reads:
Inspection program name: Identify various inspection activities (programs) within the electrical corporation (e.g., routine, enhanced vegetation, off-cycle)
"Enhanced vegetation" appears there as an example of a name a utility might choose. Nothing downstream of that line fixes what the name covers. The same section asks the utility to state the area inspected, the frequency, and the basis on which it prescribes clearance, and it offers GO 95 Table 1, GO 95 Appendix E and ANSI A300 as examples of that basis. The utility fills in the blanks and Energy Safety approves or rejects the plan.
That is also where the ambiguity in the 12-foot figure sits. PG&E described 12 feet as "recommended in Appendix E of GO 95." SCE describes its own enhanced distance as one that "aligns with the GO95 Rule 35, Appendix E recommended clearance." Neither treats it as a requirement. Appendix E is guidance to a rule.
The mandatory distances are elsewhere, in GO 95 Rule 35 and PRC 4293, and they do not change because a utility has an enhanced program. An enhanced program is the distance a utility chose to add on top, in the area it chose to add it. The utility sets that number in its plan.
What the name bought at PG&E
Energy Safety asked PG&E in 2023 how it operationalized the recommended clearances. The answer draws the line this whole term exists to draw:
The minimum clearance at time of work on Enhanced Vegetation Management is 12 feet as recommended in Appendix E of GO 95. Routine maintenance of previously cleared EVM spans is also 12 feet. Routine maintenance of all other spans is prescribed 2-3 years of clearance.
Three sentences, three standards on one system. Twelve feet on an EVM span when the crew is there. Twelve feet again when that span comes back around. Everywhere else, a growth allowance sized to the species and the site. The gap between the third sentence and the first two is what the word enhanced was buying. The difference between a distance achieved on the day and a distance that has to survive until the next cycle is covered in time of trim versus maintained clearance.
The unit was the circuit mile. PG&E's 2022 workplan attachment carried one tab named "2022 EVM Miles Planned" and a second named "2022 EVM Miles Completed," and PG&E described the second column as "the number of miles that were completed and work verified in 2022." The mile closed on verification.
The program also produced an inventory, and the inventory outlived it. PG&E's 2023 plan estimated "more than 300,000 trees at the end of 2022"; in the same discovery log PG&E referred to working down the risk associated with "the remaining 385K" units identified under EVM guidelines. Those listed trees moved into a transitional Tree Removal Inventory program. Two new programs, Vegetation Management for Operational Mitigation and Focused Tree Inspections, took over finding new ones.
What the name bought at SCE, in four distances
SCE calls the same idea expanded clearance and prices work against a ladder of four distances. A footnote to the work order section of its 2026-2028 plan defines them:
RCD means Regulatory Clearance Distance, and is the minimum clearance required by regulation. CCD means Compliance Clearance Distance and is SCE's minimum clearance standard which is 1.5 times the RCD. TCD means Trigger Clearance Distance. TCD is derived from CCD plus 3 feet and is the distance that triggers the maintenance activity. GRCD is the Grid Resiliency Clearance Distance, which aligns with the GO95 Rule 35, Appendix E recommended clearance.
Distance | Who sets it | How it is derived |
Regulatory Clearance Distance (RCD) | Regulation | The minimum required by regulation |
Compliance Clearance Distance (CCD) | SCE | 1.5 times the RCD |
Trigger Clearance Distance (TCD) | SCE | CCD plus 3 feet |
Grid Resiliency Clearance Distance (GRCD) | SCE | Aligned to the GO 95 Rule 35 Appendix E recommendation |
One of the four is law. For distribution lines in SCE's High Fire Risk Area, the plan states that SCE "strives to obtain expanded clearances of 12 feet or greater" while maintaining "at least the required four feet clearance." For transmission the figures are 30 feet and 10 feet. Read the verbs. "Strives to obtain" is an aim. "Maintains at least" is the commitment. A unit priced at the aim and worked to the commitment is a different unit, and the plan does not price it for you.
The ladder also runs the clock. A Priority 2 condition inside the RCD is remediated within 30 days, and one between the RCD and the TCD within 90 days, both subject to constraints. As of March 7, 2025, SCE's past due table held 1,806 work orders in the first category and 12,045 in the second.
The program on a purchase order may no longer be a program
SCE retired expanded clearances as a standalone plan activity. Section 9.3.4 of the 2026-2028 plan says why:
Since expanded clearance implementation began in 2019, SCE has observed a reduction in vegetation-caused outage events. This trend has continued year-over-year; therefore, SCE has standardized expanded clearances and incorporated the Grid Resiliency Clearance Distance (GRCD) into the Routine Line Clearing scope of work going forward.
The tracking ID moved with it. VM-7 used to mean expanded clearances for distribution lines. In the current plan VM-7 means Inspections for Vegetation Clearance from Distribution Lines, an activity that folds the old VM-7 together with the old VM-9, remote sensing distribution inspections. SCE's target tables carry a column headed "Previous Tracking ID, if applicable" for exactly this reason. The plan also records that SCE refers to VM-7 and VM-8 collectively as Routine Line Clearing, so the enhanced distance now travels inside a program named routine.
A scope of work drafted against a 2023 plan and issued in 2026 can name an activity, a tracking ID and a target unit that no longer line up with each other. Three checks close that gap. Name the utility. Name the plan revision, which for SCE is Revision 4 of June 26, 2026, with an errata filed on August 26, 2026. Name the tracking ID and its predecessor. How a plan moves between those revisions is covered in the three-year WMP cycle.
What an enhanced program never covered
Four kinds of work sit outside a line clearance program, in separate plan sections with separate targets and separate units.
Pole and structure clearing under PRC 4292. SCE's plan is explicit about the seam: "The structure brushing program maintains clearance from the ground up to eight feet. Clearances above eight feet are maintained in the Routine Line Clearing Programs (VM-7 and VM-8)." The unit is the structure.
Fall-in risk. Hazard Tree Management and Dead and Dying Tree Removal are their own activities, VM-1 and VM-4. SCE states that Hazard Tree Management "is distinct from other inspection activities that focus on establishing clearances from power lines, as it specifically targets fall-in risk posed by trees located outside of the prescribed clearance zones." What counts as such a tree is covered in hazard tree definition.
Defensible space around substations. A separate section of the plan again, excluded by name from the vegetation inspection section.
The regulatory minimum itself. It is owed on every span whether or not an enhanced program exists, and a contractor working to the enhanced distance satisfies it along the way.
The unit, and what closes it
The plan states the unit before it states the number, and the unit is what a purchase order counts.
Activity | Tracking ID | Target unit | 2026 target |
Inspections for Vegetation Clearance from Distribution Lines | VM-7 | Circuit miles inspected | 100 percent of HFRA distribution circuit miles |
Inspections for Vegetation Clearance from Transmission Lines | VM-8 | Circuit miles inspected | 100 percent of HFRA transmission circuit miles |
Hazard Tree Management Program | VM-1 | Circuit miles inspected | 5,300 circuit miles |
Dead and Dying Tree Removal | VM-4 | Circuit miles inspected | 6,100 circuit miles |
Each of those carries a cumulative quarterly target as well as an annual one. VM-7 runs 17 percent, 44 percent, 72 percent and 100 percent across the four quarters of 2026, and the same four figures again in 2027 and 2028. That is the calendar a crew count is built against, and a contract that promises an annual total without the quarterly shape has not promised the thing the plan commits to.
Closure runs through quality control. SCE's 2026 plan samples 6,400 of 9,177 circuit miles for VM-7, takes 100 percent of that sample inside the High Fire Threat District, and sets a pass rate target of 100 percent for each of the three plan years. For VM-1 and VM-4 the sample is every tree prescribed for mitigation.
For compliance structure brushing it is 3,958 structures out of 81,000. PG&E's phrasing for the same idea was blunter: miles "completed and work verified." What the state does when the achieved pass rate lands below the committed one is covered in Energy Safety audits.
Constraints are the scope nobody bills
Prescribed work that cannot be done is a large and permanent share of any clearance program. SCE lists what stops it:
Constraints that can impact remediation include but may not be limited to: access, authorization, scheduling, resources, customer refusals, environmental (nesting birds, protected species habitat, archeological sites, cultural sites, human remains/criminal investigation), safety concerns, outage coordination, weather (flood, fire, snow, wind), permitting (City, County, State, Federal), and technological.
Then the sentence that decides whether a constrained unit is defensible:
Constraints, when practical, are documented in the vegetation work management system to the extent they are specific to an individual tree or work point.
An unworked unit with that record attached is constrained. An unworked unit without it is a past due work order, and past due work orders are counted, tabled and filed. The scale is not marginal. PG&E stood up a dedicated constraints team for EVM, and reported that it resolved approximately 390 miles of constrained work by the end of 2021 and 703 miles in 2022, about an 80 percent increase.
SCE names property owner approval among the challenges to achieving its enhanced distance. What a crew may and may not do once an owner says no is covered in notice and refusal limits.
Where this lands on a contract
Six things decide what an enhanced vegetation scope is worth, and all six are in public documents before the bid opens.
What to pin | Where it comes from |
Utility and plan revision | The plan on file in the Energy Safety docket, by revision number and date |
Activity name and tracking ID, plus the previous tracking ID | The plan's target tables |
Target unit | Circuit mile, tree, or structure, stated per activity |
Distance standard and the verb attached to it | The clearance subsection for that activity |
What closes a unit | The quality control table: population, sample, pass rate target |
How a constraint is recorded | The work order section, and the system of record it names |
The plan language also arrives in the subcontract. SCE's statement of work "requires contractors to rake up and dispose of vegetation, and to leave work sites in a condition consistent with the condition before work was performed." That is a wood and slash commitment made in a plan and written through to the crew that does the raking.
Every enhanced program works the same way. A distance a utility chose becomes a target it filed, becomes a unit it counts, becomes a line on a purchase order, becomes a pass rate somebody measures against a sample. The three letters at the top of the scope of work are the only part of that chain with no fixed meaning.
Further reading
The three-year WMP cycle and what changes between filings: Revision notices, errata and amendments, and how to read a scope of work against the right plan version.
How Energy Safety audits vegetation management: What the state reads when it checks whether the plan was implemented, and what a missed pass rate does.
How California utility Wildfire Mitigation Plans work under AB 1054: Why a plan target becomes contracted scope, and which agency approves the plan and which the money.
Frequently asked questions
Is Enhanced Vegetation Management defined in California law?
No. No statute or general order defines it. Energy Safety's wildfire mitigation plan template asks each electrical corporation to name its own vegetation inspection activities and then describe where they apply, what clearance they prescribe and what they target. The 2026-2028 Guidelines list 'routine, enhanced vegetation, off-cycle' as examples of names a utility might use. The content of the term comes from one utility's approved plan, not from the code.
Does PG&E still run an EVM program?
No. Asked in 2023 for its Enhanced Vegetation Management workplans for 2023 and 2024, PG&E answered that the EVM program concluded at the end of 2022 and that no workplan exists for either year. The trees already listed under EVM moved into a transitional Tree Removal Inventory program, and two new programs, Vegetation Management for Operational Mitigation and Focused Tree Inspections, took over identifying new work.
What clearance does an enhanced program require?
Whatever the utility committed to in its plan. PG&E stated that the minimum clearance at time of work on Enhanced Vegetation Management was 12 feet, citing Appendix E of GO 95 as a recommendation rather than a requirement. Southern California Edison states it strives to obtain 12 feet or greater on distribution lines in its High Fire Risk Area, against a regulatory floor of four feet.
What unit is enhanced vegetation management work bought in?
Usually the circuit mile, sometimes the tree, and for pole clearing the structure. PG&E tracked EVM in miles planned and miles completed by circuit segment. SCE's 2026-2028 plan sets circuit mile targets for its four vegetation inspection activities and a structure count for compliance structure brushing. The unit in the plan is the unit the quarterly target is measured in.
If a property owner refuses access, does the unit still count?
Only if the refusal is recorded against the work point. SCE names customer refusals among the constraints that can delay remediation, and states that constraints are documented in the vegetation work management system when they are specific to an individual tree or work point. An unworked unit with a constraint record is constrained. An unworked unit without one reads as a past due work order.
