Lake Coeur d'Alene — Cram Quiz

Do not reread. Try to answer, then reveal it. Missed cards return shortly; that is the point.

Fastest way to learn: do the core round twice, then Missed only. For each miss, say the answer aloud before tapping anything. No database, account, or internet needed.

Keyboard: Space = reveal/next · 1–4 = choice · G = got it · M = missed.

TopicCard 10 known · 0 missed

Round complete

Good work.

60-second sheet

Anchor facts

Flow mnemonic: CDA + St. Joe IN; Spokane OUT.

About 90% of inflow comes from the Coeur d'Alene and St. Joe Rivers.

Post Falls Dam — 1906.

It regulates lake levels; the lake formed 18,000–13,000 years ago after Missoula-flood sediment dammed the Spokane River.

Watershed ≠ lake.

Watershed: ~3,740 sq mi. Lake: ~50 sq mi at full summer pool, ~135 miles shoreline.

South Fork = Silver Valley mining.

Core legacy metals: lead, cadmium, arsenic, zinc. Bunker Hill was listed in 1983.

Water-quality chain.

Phosphorus → more biological growth → oxygen loss at depth → possible release of legacy metals from sediment.

Tribal wording matters.

The Coeur d'Alene Tribe is Schitsu'umsh (“Those who were found here”). Do not frame lake ownership as a later “takeover.”

Date trap.

1975: mesotrophic (moderately productive). 1991–92: oligotrophic (low productivity). Different studies/dates.