This slideshow shows daily monitoring of San Elijo Lagoon's only channel to the Pacific Ocean, which is historically restricted by a railroad and highways. Viewers can watch the slow accumulation of sand and cobble that becomes trapped in this passage, therefore restricting water flow.
Each year in spring, following the last major winter storm, the inlet is mechanically breached to reconnect San Elijo Lagoon to the Pacific Ocean. In 2014 the inlet channel was 80% blocked. Dredging the inlet allows for increased water flow, which means cleaner beaches and improved water quality throughout the wetland. Mosquitoes are also drastically reduced, which is why County of San Diego Vector Control Program funds part of this annual operation.