SCHEMA:
CREATE TABLE table_17978052_2 (_number_s_dam_and_gnis_query_link INTEGER, borough_or_census_area VARCHAR)
USER:
How many dams are there in the Nome (CA) area?

QUERY:
SELECT MIN(_number_s_dam_and_gnis_query_link) FROM table_17978052_2 WHERE borough_or_census_area = "Nome (CA)"