green tube

Arcata Marsh and Wildlife Sanctuary
Specifications

green tube


SPECIFICATIONS

Design Population 19,056
Average Annual Flow 2.3 mgd
Maximum Monthly Flow 5.9 mgd
Peak Flow 16.5 mgd
BOD's Load 4100 lbs/day
TSS Load 3400 lbs/day


 

Headworks

Mechanically Cleaned Bar Screens 2 at 5 mgd each
Gravity Grit Removal 144ft^2


 
 

Primary Treatment

2 Primary clarifiers 26 ft. diameter/60 ft. diameter
Retention time at design flow 3.8 hours
Retention time at maximum monthly flow 1.4 hours


 
 

Treatment Marshes

Total area 7.5 acres
Average Depth  2 feet
Total detention time at design flow 1.9 days


 
 

Chlorination/Dechlorination

Volume 185,400 gallons
Retention time at design flow 58 minutes
Retention Time at maximum monthly flow 30 minutes


 
 

3 Enhancement Marshes

Total area 31 acres
Ave. depth 1.5 feet
Retention time at ave. flow 9 days 

green tube

Return to Specs and Acknowledgments Page