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GET
Get SPP interconnection queue data

Overview

The SPP interconnection queue endpoint provides access to real-time data from Southwest Power Pool’s interconnection queue. SPP serves the central United States with significant wind resources.
SPP Coverage: Contains 800+ projects across the central U.S. Top technologies: Wind (400+ projects), Solar (200+ projects), Battery Storage (100+ projects), Natural Gas (100+ projects).

Endpoint

Coverage Area

States Served: Arkansas, Kansas, Louisiana, Missouri, Nebraska, New Mexico, Oklahoma, and Texas, with portions of Iowa, Minnesota, Montana, North Dakota, South Dakota, and Wyoming.

Query Parameters

Technology Distribution

Status Options

Top States by Project Count

Example Requests

Filters for projects developed by NextEra Energy Resources. Uses partial matching to find all NextEra projects in SPP territory.

Response Schema

Complete Upstream Data: Each project includes all 43 database columns from SPP’s interconnection queue at the top level. This provides complete transparency with both standardized fields (normalized across all ISOs) and SPP-specific raw fields like generation_interconnection_number, current_cluster, and jtiq_participant.

Response Fields

Core Identification Fields

Capacity & Technology

Project Status & Dates

Location

Study Process & Cluster Information

Grid Connection & Service

SPP-Specific Fields

Developer Information

SPP Queue Terminology

DISIS (Definitive Interconnection System Impact Study)

SPP’s cluster study process where projects are studied in annual cohorts grouped by transmission zone. Projects are studied together to assess cumulative system impacts and allocate network upgrade costs equitably among projects in each cluster.

Cluster Groups

SPP divides its territory into transmission zones (e.g., “04 SOUTHEAST”, “03 CENTRAL”) for organizing DISIS cluster studies. Each annual DISIS cohort (e.g., “DISIS-2011-001”) contains projects grouped by these zones for efficient regional analysis.

Service Types

  • ER (Energy Resource): Energy-only interconnection without transmission network upgrade obligations
  • NR (Network Resource): Full network service requiring participation in network upgrade costs and providing firm transmission capacity
  • ER/NR: Hybrid service combining both energy resource and network resource interconnection rights

JTIQ (Joint Targeted Interconnection Queue)

Coordinated interconnection study process for projects located at the SPP/MISO seam requiring joint analysis by both ISOs to assess impacts on both systems.

Generation Interconnection Agreement (GIA)

Final contract between generator and SPP governing interconnection terms, cost allocation, operational requirements, and construction milestones.

Status Categories

SPP tracks detailed project status through multiple study phases:
  • IA FULLY EXECUTED/ON SCHEDULE: Interconnection Agreement signed and project on schedule
  • IA FULLY EXECUTED/COMMERCIAL OPERATION: Project has achieved commercial operation
  • IA FULLY EXECUTED/ON SUSPENSION: Agreement executed but study process suspended
  • IA PENDING: Interconnection Agreement pending execution
  • DISIS STAGE: In Definitive Interconnection System Impact Study phase
  • FACILITY STUDY STAGE: In Facilities Study phase evaluating specific interconnection facilities
  • FEASIBILITY: In Feasibility Study phase
  • ERAS: In Early Risk Assessment Study phase (optional pre-study)
  • WITHDRAWN: Project withdrawn from queue by developer
  • TERMINATED: Project terminated by SPP
Data Updates: SPP queue data is updated based on Southwest Power Pool’s Generation Interconnection queue reports.

Authorizations

x-api-key
string
header
required

API key authentication using x-api-key header

Query Parameters

limit
integer
default:50

Number of records to return

Required range: 50 <= x <= 5000
offset
integer
default:0

Number of records to skip

state
string

Filter by state code

technology
string

Filter by technology type

min_capacity
number

Minimum capacity in MW

max_capacity
number

Maximum capacity in MW

Response

Successful response with SPP interconnection queue data

iso
string
Example:

"SPP"

summary
object

Summary metadata for pagination

filters
object

Applied filters for the request

data
object[]

Array of interconnection queue records