Since the TRACON people are already in here talking shit:
- Arrival claims UAL had 15 aircraft lined up for 28L. This leads me to believe Norcal Approach isn't giving the required spacing to SFO per their LOA. Ill check on that later.
- Departure was lined up when aircraft was 4 mile final.
- SFO relayed to departure to be ready and that arrival would be just inside 2 mile final. Ive seen this type of thing happen regularly at my tower when up and down the same runway. Local had the departure prompted and ready.
I'm assuming that had the Local Controller waited, the exact situation would occur in the next gap. I'm going to go watch the replay myself and read their LOA. Radar only controllers cause these problems. They sit at their facility with an ASDE display and point to it and see "see it worked" after local gives S Turns, slows the arrivals down, does all types of prompting just to make sure runway separation exists and then delays departures because they can't follow simple LOAs.