Salton Sea

Yes — when you assign an engineer to an action space that space is blocked until the end-of-round return phase; placing additional engineers increases the action’s strength (pp. 10, 14).

You pay by discarding $1/$3/$5 action cards to meet costs and you do not receive change; some action cards also grant discounts or modified effects when used (p. 15; see action-card lists pp. 34–36).

No — a Sell action targets one corporation, though you may sell up to three product units to that corporation in the same action and you gain the stated cash/VP while advancing its value track (pp. 22–23).

You acquire contracts to your board and execute them by placing an engineer and paying the required product units to receive money/VP/shares/etc.; contracts are removed or resolved during the end-of-round procedures (pp. 24, 12).

The Drill action lowers the drill and applies rock damage along the drill track; certain track spaces trigger freezing or multi-layer effects as indicated on the drill track (p. 17).

Yes — processing requires a working plant; you can convert brine into lithium (base $6) or geothermal/energy (base $4), with optional bonuses available (+3 lithium or +2 energy) when meeting their conditions (p. 20).