I thought comparing capacity factor instead of capacity would be more fair, but I got roughly the same result. Elwha's capacity factor was, at one point, 39% [0], and capacity factor for wind turbines in the US is ~35% [1]. However, we're still comparing a source of on-demand power to a source of intermittent power.

[0] https://www.osti.gov/servlets/purl/6536093 (page 14)

[1] https://www.eia.gov/todayinenergy/detail.php?id=52038