Monthly Report, March 2020 Public Works Department

WATER – A total of 34,500,000 gallons of water were treated and delivered during March. 11,417,600 gallons from Alder Creek treatment plant, 8,249,000 gallons from Brownell Springs and 14,834,800 gallons purchased from City of Portland. Peak day production was 1.60 MGD on March 10th. 6.24 inches of rainfall were recorded at the water treatment plant site during the month.

WASTEWATER – A total of 39,070,000 gallons of sewage were treated and discharged to Tickle Creek. Maximum flow was 2.66 MGD on the 31st (rainfall was 0.21″ on the 30th and 0.65″ on the 31st). Monthly rainfall recorded at the plant was 4.04 inches. 123,820 gallons of sludge were dewatered and stored. Average BOD concentration was 15.5 MG/L (permit allows 10 MG/L) BOD lbs discharged were 194 lbs/day (permit allows 125 lbs/day) Average SS concentration was 27.9 MG/L (permit allows 10 MG/L) SS lbs discharged were 361.8 lbs/day (permit allows 125 lbs/day). There were permit violations for weekly and monthly SS and BOD concentration and loading and monthly average ammonia in March. A new scum pumping system for the clarifiers was installed.

PARKS Parks staff installed closure signs for all City parks on March 27th to comply with the State of Oregon’s social distancing requirements. The closure gave parks staff a good opportunity to rest, fertilize and overseed the turf in the dog park at Sandy Bluff and catch up on other items at City parks.