DAX summarize with measures for This YR Last YR - powerbi

Question

I am using DAX SUMMARIZE() as shown in this YT video. It works great to summarize measurement for a Dimension table with relationship to Fact table. But when I try to introduce a filtered measure for "This Year" and "Last Year" columns, the calculation ignores the summarized columns and calculates the entire year.
How can I write the query to add "This Year" and "Last Year" columns that respect the summarized values.
DAX query (#1) >
Disposal Attributes (calc field) =
VAR VolumeTotal = SUM('Piped Trucked Volume'[volume_bbls])
VAR vol_CurrentYear = CALCULATE(VolumeTotal, FILTER('Calendar', 'Calendar'[Year] = YEAR(TODAY())) )
VAR vol_PriorYear = CALCULATE(VolumeTotal, FILTER('Calendar', 'Calendar'[Year] = YEAR(TODAY())-1) )
var ListTotal =
SUMMARIZE (
'Disposal',
[unified_disposalId],
[Disposal (unified_name)],
[Disposal (groups)],
"Volume", FORMAT(VolumeTotal, "#,#"),
"Vol_ThisYr", FORMAT(vol_CurrentYear, "#,#"),
"Vol_PriorYr", FORMAT(vol_PriorYear, "#,#")
)
RETURN
FILTER(
ListTotal, VolumeTotal > 0
)
DAX query (#2) >
Disposal Attributes (calc field) =
VAR VolumeTotal = SUM('Piped Trucked Volume'[volume_bbls])
VAR vol_CurrentYear = CALCULATE(VolumeTotal, FILTER('Calendar', 'Calendar'[Year] = YEAR(TODAY())) )
VAR vol_PriorYear = CALCULATE(VolumeTotal, FILTER('Calendar', 'Calendar'[Year] = YEAR(TODAY())-1) )
var ListTotal =
SUMMARIZE (
'Disposal',
[unified_disposalId],
[Disposal (unified_name)],
[Disposal (groups)],
"Volume", FORMAT(VolumeTotal, "#,#")
)
RETURN
ADDCOLUMNS(
FILTER(
ListTotal, VolumeTotal > 0
),
"Vol_ThisYr", FORMAT(vol_CurrentYear, "#,#"),
"Vol_PriorYr", FORMAT(vol_PriorYear, "#,#")
)
Relationships >
Result >

Answer 1

with "VAR vol_CurrentYear" you always get the same value. To put calculations into the row context use CALCULATE() in the ADDCOLUMNS(). You can create measures instead of variables and use them then in ADDCOLUMNS it will have the same effect.
Disposal Attributes (calc field) =
VAR VolumeTotal = SUM('Piped Trucked Volume'[volume_bbls])
--VAR vol_CurrentYear = CALCULATE(VolumeTotal, FILTER('Calendar', 'Calendar'[Year] = YEAR(TODAY())) )
--VAR vol_PriorYear = CALCULATE(VolumeTotal, FILTER('Calendar', 'Calendar'[Year] = YEAR(TODAY())-1) )
var ListTotal =
SUMMARIZE (
'Disposal',
[unified_disposalId],
[Disposal (unified_name)],
[Disposal (groups)],
"Volume", FORMAT(VolumeTotal, "#,#")
)
RETURN
ADDCOLUMNS(
FILTER(
ListTotal, VolumeTotal > 0
),
"Vol_ThisYr", FORMAT(CALCULATE(VolumeTotal, FILTER('Calendar', 'Calendar'[Year] = YEAR(TODAY())) ), "#,#"),
"Vol_PriorYr", FORMAT(CALCULATE(VolumeTotal, FILTER('Calendar', 'Calendar'[Year] = YEAR(TODAY())-1) ), "#,#")
)

Answer 2

The answer from Mik got me down the correct path.
To put calculations into the row context use CALCULATE() in the ADDCOLUMNS(). You can create measures instead of variables and use them then in ADDCOLUMNS it will have the same effect.
I noticed that the "variables" weren't working at all. Best as I can tell in PBI Desktop the DEFINE syntax is invalid, so I couldn't define measures, I had to add the measure definition within the query.
Disposal Attributes (calc field) =
// VAR VolumeTotal = SUM( 'Piped Trucked Volume'[volume_bbls] )
// VAR vol_CurrentYear = CALCULATE(VolumeTotal, FILTER('Calendar', 'Calendar'[Year] = YEAR(TODAY())) )
// VAR vol_PriorYear = CALCULATE(VolumeTotal, FILTER('Calendar', 'Calendar'[Year] = YEAR(TODAY())-1) )
var ListTotal =
SUMMARIZE (
'Disposal',
[unified_disposalId],
[Disposal (unified_name)],
[Disposal (groups)],
"Volume", SUM( 'Piped Trucked Volume'[volume_bbls] )
)
RETURN
ADDCOLUMNS(
FILTER(
ListTotal, [Volume] > 0
),
"Vol_ThisYr", FORMAT(CALCULATE(SUM( 'Piped Trucked Volume'[volume_bbls] ), FILTER('Calendar', 'Calendar'[Year] = YEAR(TODAY())) ), "#,#"),
"Vol_PriorYr", FORMAT(CALCULATE(SUM( 'Piped Trucked Volume'[volume_bbls] ), FILTER('Calendar', 'Calendar'[Year] = YEAR(TODAY())-1) ), "#,#"),
"Volume (,)", FORMAT( [Volume], "#,#")
)
Result >