Carcassman,
Yes, there was a numeric requirement for coho to be met at barrier dam in the 1966/67 agreement. Tacoma caught on to WDF opening the Columbia to gillnets 5 or more days per week so that the mitigation requirement could not be met. That's but one reason why Tacoma wanted a different metric in the new license.
The new license requires upstream and downstream passage for the term of the license. Different stakeholders wanted different things. So there was a measure requiring volitional passage from Mayfield Lake up and over Mossyrock if and when wild returns +> 1.0, indicating sustainability. That term also included the option of using that passage money for additional fish enhancement if the FTC agreed.
Personally I never thought it would be a good idea to transport all wild fish to Mayfield Lake to allow self sorting (which is a desirable thing) and then re-trap the adults that show up at the base of Mossyrock. Fish passage history is replete with losses between dams so the benefit of fish self sorting would be lost to fewer fish arriving at the next upstream dam. This has required giving Tiltion origin fish a mark when they arrive at the Mayfield fish counting house, but such is the price of wanting and having both hydropower and fisheries from the same river.
My impression is that different WDFW representatives wanted different things from the new license. The one thing they all seemed to agree on was no reduction in FTEs. Some care about restoring wild fish to the upper basin, and some, like Region 5 management, were most concerned about retaining harvestable salmon in the ocean and LCR, with lip service to restoring wild fish in the upper basin.
BTW, Tacoma was just starting the new juvenile downstream passage facility at Lewis PUD's Cowlitz Falls Dam in early 2016. (Complicated agreement between two utilities that weren't getting along a few years back) It should be in service either this spring (2018) or the next (2019). I need to check on this. This will be key to the reality of recoving natural salmon and steelhead production in the uppper watershed.
Sg