How many counties are at milepost 69.5? 
CREATE TABLE table_2572788_1 (county VARCHAR, milepost VARCHAR)
SELECT COUNT(county) FROM table_2572788_1 WHERE milepost = "69.5"
### Context: CREATE TABLE table_2572788_1 (county VARCHAR, milepost VARCHAR) ### Question: How many counties are at milepost 69.5?  ### Answer: SELECT COUNT(county) FROM table_2572788_1 WHERE milepost = "69.5"