BPA Total Transmission System Load

BPA Total Transmission System Load every hour since 2007: generation in the balancing area plus interchange and wheeling onto the system, the measure BPA bills monthly transmission peaks on.

BPALoad data BPA market

Query with the agent

Native record

feed x hour

hourly publication cadence

Evidence

Observed market data

Published observations from the named source

Time basis

Point-in-time records

UTC · event_time

Overview

BPA Total Transmission System Load every hour since 2007: generation in the balancing area plus interchange and wheeling onto the system, the measure BPA bills monthly transmission peaks on.

Query contract

Preserve one canonical row per (feed, event_time) before aggregating.

Analysis rules

Use by_hour for history and current_month for hours it does not yet hold.

Interpretation

TTSL is not a regulatory system-load measure.

Access

Query from your own tools

Use the guarded HTTP endpoint directly, or connect an MCP client and load the dataset contract with describe_data before calling query_data.

BPA MCP API reference

HTTP endpoint

POST /api/v1/datasets/bpa_ttsl_hourly/query

Schema7

Column

Type

event_timeDateTime64(6, 'UTC')

feedLowCardinality(String)

load_dateDate32

hour_endingInt32

ttsl_mwNullable(Float64)

source_fileString

ingested_atDateTime64(6, 'UTC')

Sample data

No preview available.

Coverage

No time-indexed data — coverage isn’t applicable to this dataset.

Related load data

Related load data
Dataset	Description
BPA FERC 714 Hourly LoadBPA · hourly	Hourly BPA load from Part III Schedule 2(a) of its FERC Form 714 filings, 1998 onward, long by series as printed (system load, area load, balancing authority area load).
BPA Tri-Cities MonitoringBPA · 5-minute	BPA's Tri-Cities area monitoring charts: area load, import and generation (MW), Hanford bus frequency (Hz), Ashe and Benton bus voltages (kV). Seven days rolling from BPA; history accrues from collection.
7-Day Load ForecastPJM · hourly (7-day horizon)	PJM's seven-day-ahead hourly load forecast by forecast area, refreshed through the day. Rows are keyed by target time (event_time) with the issue time in evaluated_at_utc; take the latest vintage per target hour via an argMax over evaluated_at_utc. Forecast areas match the very-short-term feed (utility names, RTO_COMBINED for the system total). This is the table for tomorrow's peak and the week-ahead demand outlook. Source: PJM Market Data.
Actual Demand by RegionMISO · hourly	Observed hourly MISO demand in MW for the Central, North, and South sub-regions. Region labels are normalized to uppercase; this is regional operational load, not a local-resource-zone series.