Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_90 (dam_type VARCHAR, year_completed VARCHAR)
### Question:
Which dam type was completed in 1961?
### Answer:
SELECT dam_type FROM table_name_90 WHERE year_completed = 1961