East / West Capacity and Obligation

Published East/West capacity and obligation snapshot, preserving LocalInterval as a source calendar label.

Ancillary Services data SPP market

Query with the agent

Native record

complete source publication × source row ordinal; preserve BAA

source publication publication cadence

Evidence

Observed market data

Published observations from the named source

Time basis

Point-in-time records

UTC · static reference

Overview

event_time and published_at are file publication, not a converted local event clock. Source numeric units are not inferred from the bare Capacity and Obligation headers. Complete views require a matching receipt and mirrored row count; empty results are unknown coverage. Raw sources retain publication history internally.

Query contract

Published East/West capacity and obligation snapshot, preserving LocalInterval as a source calendar label. event_time and published_at are file publication, not a converted local event clock. Source numeric units are not inferred from the bare Capacity and Obligation headers. Complete views require a matching receipt and mirrored row count; empty results are unknown coverage. Raw sources retain publication history internally.

Analysis rules

Keep SPP East and SWPW West separate. Never combine a published Total with its footprint components.
Do not sum model rows, publication attempts, repeated forecast vintages or duplicate weekly report entries as physical capacity.

Interpretation

Published East/West capacity and obligation snapshot, preserving LocalInterval as a source calendar label. event_time and published_at are file publication, not a converted local event clock. Source numeric units are not inferred from the bare Capacity and Obligation headers. Complete views require a matching receipt and mirrored row count; empty results are unknown coverage. Raw sources retain publication history internally.
Model identities are not authoritative physical asset IDs, coordinates, outage attribution or nodal sensitivities.

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.

SPP MCP API reference

HTTP endpoint

POST /api/v1/datasets/spp_public_capacity_obligation/query

Need the full history of this dataset in Snowflake, Databricks or your own storage? Data services delivers it on a schedule.

Schema14

Column

Type

event_timeDateTime64(6, 'UTC')

published_atDateTime64(6, 'UTC')

snapshot_timeDateTime64(6, 'UTC')

snapshot_idString

row_numberInt64

baaString

source_fileString

source_urlString

content_hashString

record_jsonString

target_time_labelNullable(String)

capacityNullable(Float64)

obligationNullable(Float64)

ingested_atDateTime64(6, 'UTC')

Sample data

event_time	published_at	snapshot_time	snapshot_id	row_number	baa	source_file	source_url	content_hash	record_json	target_time_label	capacity	obligation	ingested_at
2026-10-10 01:17:20.509000	2026-10-10 01:17:20.509000	2026-10-10 01:19:39.838330	c7cb665404d60d5333345d28c69cd07438b280504e0d2ebacca114cb97d1ea02	1	SPP	Operational_Data/Capacity_Obligation_SPPGO/capacity_obligation_sppgo_SPP.csv	https://portal.spp.org/	d6514d8b31828cb9c836404bad21a4f3ede6935a140adb9802c5aeddcf238136	{"LocalInterval": "10/09/2026 20:15:00", "Capacity": "47999.8000", "Obligation": "40471.2100"}	10/09/2026 20:15:00	47999.8	40471.21	2026-10-10 01:19:39.855272
2026-10-10 01:17:20.519000	2026-10-10 01:17:20.519000	2026-10-10 01:21:05.465796	59f2435be739e59a9eb47f8c0c18d33aa6bedc1dbd0faeaef4e8093fcc0f229c	1	SWPW	Operational_Data/Capacity_Obligation_SPPGO/capacity_obligation_sppgo_SWPW.csv	https://portal.spp.org/	fae82e5bcd155bc5eb2e1d0ef37797888fb9abf5ccc2ae175e4ee67d11de26ce	{"LocalInterval": "10/09/2026 20:15:00", "Capacity": "3667.8000", "Obligation": "3060.4600"}	10/09/2026 20:15:00	3667.8	3060.46	2026-10-10 01:21:05.486973

Coverage

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

Related ancillary services data

Related ancillary services data
Dataset	Description
Ancillary Service Market Clearing PricesSPP · 5-minute (RTBM) and hourly (Day-Ahead)	Cleared ancillary-service prices by SPP reserve zone for both the real-time balancing market and the day-ahead market. SPP's product set does not map onto other ISOs': regulation clears as a separate service (capacity) price and mileage price in each direction (reg_up_service, reg_up_mile, reg_dn_service, reg_dn_mile), alongside ramp up and down, spinning, supplemental, and uncertainty products. IMPORTANT: reserve_zone mixes two grains. It carries the numeric ancillary reserve zones (1 through 5 under the SPP balancing authority, 21 under the separate SWPW balancing authority) AND the two balancing-authority roll-ups, 'SPP' and 'SWPW', whose prices equal those of their member zones. Aggregating across every value of reserve_zone double-counts the market.
Cleared Operating ReservesSPP · 5-minute	Cleared ancillary-service quantities in MW by SPP reserve zone: regulation up and down, ramp up and down, spinning, supplemental, and both uncertainty products (unc_up and the short-term sts_unc_up). The quantity counterpart to the ancillary clearing prices. The same reserve_zone caveat applies: the column carries both the numeric reserve zones and the 'SPP' and 'SWPW' balancing-authority roll-ups, so aggregating across every value double-counts.
DA and RUC Headroom / FloorroomSPP · source publication	Published day-ahead market and RUC headroom/floorroom by BAA and native GMT interval end. It is a cleared/outlook report, not proof of realized operating reserves. Complete views require a matching receipt and mirrored row count; empty results are unknown coverage. Raw sources retain publication history internally.
East / West Area Control ErrorSPP · source publication	Published signed ACE MW by qualified GMT clock and filename-derived SPP/SWPW footprint. Overlapping rolling snapshots collapse to the newest complete publication per instant and BAA. History accumulates prospectively; annual archive formats are not covered here. Complete views require a matching receipt and mirrored row count; empty results are unknown coverage. Raw sources retain publication history internally.