City of Arcata Wastewater Treatment Facility.
Pond 1
Oxidation
Pond 3
Pond 2
Pond 8
Pond 3
Pond 7
Pond 6
Pond 4
Pond 5
Figure 1: Current configuration of “Fish Ponds.”
Figure 2 Proposed Treatment Marsh Cells superimposed over “Fish Ponds.”
•
The addition of Treatment
Marsh #6 adds 22% more
acreage to the total treatment
marsh area.
•
Adds more hydraulic retention
time in a treatment marsh
environment.
•
The additional treatment
reduces the loading into the
existing treatment marshes and
in turn increases water quality
of the effluent.
•
Existing berms between “fish
ponds” make an easy
transformation to treatment
marsh
Parking area
590 ft
Underwater Berm A
Underwater Berm B
Underwater Berm C
167 ft.
Figure 3 Conceptual drawing of treatment marsh 6 in old fish pond area. Underwater berms are located at
present dike locations (sections C, D and E). The locations should correspond with the underwater berms in
proposed treatment marshes 4 and 5.