Rain the poured throughout the weekend forced the A’s to postpone Sunday’s game. Even though the rain was subsiding as planned first pitch time (1:05) approached, Later that day the team announced that the game would be made up in September, as the back end of a natural (single admission) doubleheader on Saturday, the 9th. MLB guidelines along with union preferences and financial pressures usually call for teams to schedule makeup games on off days, or if a doubleheader is absolutely necessary, a split or day-night doubleheader with separate admissions. Of course, this is the A’s we’re talking about, so they may actually benefit from one day’s admission more than two. Tickets for the postponed won’t be honored for the doubleheader because it’s not a new date. Tickets have already been sold for the original 9/9 game, so fans can trade in another date on the home schedule. That should also mean that they can trade in for 9/9, but there’s a good chance that their seats will be marginally worse. Best way to find out is to contact Ticket Services.
As for what caused the postponement, remember that it’s been three years since the last postponement, also caused by a soggy field. Back then, the tarp was left off the field in hopes of some of the water evaporating. That’s quite different from the normal way of getting rid of water: gravity. Modern fields have some form of drainage system to move water out of the ground quickly. That works most everywhere except for the Coliseum, where the field remains 22 feet below sea level and is subject to tidal actions. On Sunday the tide was to start coming in as the game started, reaching high tide around the end of the game. On Monday night, high tide hit at 5:30 PM and was to recede as the night progressed. That allowed the A’s to start the game with some confidence, even though a shower hit in the late innings. DIY Network provided the blurbs above, which explain how the drainage systems work. The Coli’s system was done as part of the 1995 Mount Davis renovation, though the brief period between football and baseball seasons did now allow for a complete rebuild. The Giants’ system is interesting in that it uses a vacuum pump/air system to force water out. The field is 9 feet above sea level, which means it could be tidally prone on some occasions.
Coincidentally, the Coliseum parking lot is also 9-10 feet above sea level. Any new ballpark there should have its field at least at grade or higher to deal with climate change-related sea level rise. Howard Terminal and Brooklyn Basin are at elevation 11-12 feet, and being waterfront should be subject to similar standards. Laney College is terraced, going from 13 to 30 feet from south to north.
Whatever location is chosen, great care and thought will have to go into stadium placement, footprint, and orientation. In the modern era, that’s gonna have to include elevation as well, at least as long as you’re building along the bay’s flatlands.