Question: Tell me the total number of crest length for year construction larger than 1957 for mattmark
SQL: SELECT COUNT("Crest length (meters)") FROM "2-10020178-1" WHERE "Year of construction" > 1957.0 AND "Name" = 'mattmark';

Question: Tell me the name of lake for crest length of 430
SQL: SELECT "Name of the Lake" FROM "2-10020178-1" WHERE "Crest length (meters)" = 430.0;