The cleanup was the first of the year for the department. Similar work routinely is done throughout the year on Wong Amat Beach, the Naklua bridge area and around the Dusit curve on Pattaya Beach.
City workers take a day at the beach - not to bask in the sun, but to clear away the algae covered rocks.
Thapida said the department will conduct seven cleanings this year, up from five in 2013. The increase is due to changes in ocean currents bringing more debris ashore. The average cleanup clears about 24 tons of rock.
The rock will be used as landfill in the national sports stadium site in Jomtien.
Swiss tourist Heinrich Neeser said he appreciated the beach cleaning as he sometimes feels the beach is too dirty.