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