Query
Markham
Type
Entity Briefing
Entity
Markham
Generated
2026-10-17T06:49:22.244Z

Briefing on Markham

Entity Briefing
Generated Oct 17, 2026·Dataset freshness not reported
128 MW
Capacity
Operating
Current status
1964
Operating since
4
Generators
16.7%
Capacity factor
188 GWh
Annual generation
Briefing/plantOperating

Markham is a 128 MW Conventional Hydroelectric asset in SPP (Southwest Power Pool), currently Operating.

Markham is reported in Oklahoma since 1964 under Grand River Dam Authority. Available operating and financial measures include 16.7% capacity factor and 188 GWh annual generation.

Location
Mayes, Oklahoma
Technology
Conventional Hydroelectric
Owner / parent
Grand River Dam Authority
Operator
Grand River Dam Authority
Grid
SPP (Southwest Power Pool)
Plant ID
2980

What stands out

1

Markham is a 128 MW Conventional Hydroelectric asset in Oklahoma with status Operating.

2

Latest annual operating measures report 16.7% capacity factor and 188 GWh annual generation.

Market and operating context

ISO / market
SPP (Southwest Power Pool)
Balancing authority
Southwest Power Pool
NERC region
MRO
State rank
#3 of 11
National rank
#152 of 1,462

Why it matters

For this asset in SPP (Southwest Power Pool), operating status, generation, ownership, and linked events are the primary facts for performance and asset-level diligence. The exact chart and source-linked records below let the reader test those facts before moving to a deeper report.