Class I injection wells | Any low lying area where stormwater collects, and there is sufficient land to permit, install and operate a Class I well-limited | Means to drain neighborhoods, 15 MGD capacity | $6 million | Needs baffle box | When full area served is inundated |
Infiltration trenches | Low lying areas that collect stormwater, but the water table is just below the surface meaning that retention and exfiltration trenches will not work properly | Excess water gathered from soil and drained to pump stations, creating storage capacity of soil to store runoff, soil treatment | $250/ft. plus pump statin | Significant damage to roadways for installation, maintenance needed, clogging issues, costs for pump station | Complete inundation means pumps run constantly and may pump same water over and over |
Canals | limited-canals mostly controlled by others and are losing capacity with SLR | Means to drain neighborhoods, provides treatment of water | $0.5 million/mi | land area, flow volume, maintenance | When full area served is inundated |
Salinity/lock structures | SFWMD Responsibility | Keeps sea out, reduces saltwater intrusion | Up to $10 million, may require ancillary stormwater pumping stations at $2 - 5 million each | SFWMD, western residents, private property rights arguments | n/a-solution to retard sea encroachment and saltwater intrusion |
Regional relocation of locks to pump stations | SFWMD Responsibility | Creates regional system to use coastal ridge to protect inland property, keeps saltwater out | $200 million ea. | SFWMD, western residents, private property rights arguments | n/a-solution to retard sea encroachment and protect property which can exist at levels below sea level |
Raise sea walls | Islands and downtown | Protects property | $0.1 - 1 million/lot | Private property rights, neighbors | n/a |