Monthly Report: December 2015 – Public Works Department

WATER – A total of 30,279,000 gallons of water were treated and delivered, 8,577,000 gallons from Alder Creek treatment plant, 10,940,000 gallons from Brownell Springs and 10,762,000 gallons purchased from City of Portland. Maximum day production was 1.12 MG on December 14th. 19.85 inches of rainfall were recorded at the treatment plant site during the month. We took no water from the Portland Water Bureau source for about 10 days in December due to elevated turbidity in the Bull Run system as a result of the heavy rains we had during the month. While these elevated turbidity levels still comply with the regulations for an unfiltered source like Portland’s it does require extra sampling and monitoring on our part. It is easier to turn off the PWB source and draw more water from Alder Creek and Brownell Springs during these events. Even though we can treat the water from Alder Creek its water quality was equally affected by the heavy rain. CH2M staff worked diligently to meet standards during these high rainfall and streamflow events.

WASTEWATER – A total of 109,800,000 gallons of sewage were treated and discharged to Tickle Creek. Minimum flow was 1.62 MGD on the 1st. Maximum flow was 6.52 MGD on the 7th. Rainfall was 1.6 inches on the 6th and 2.25 on the 7th. A total of 20.02 inches of rainfall were recorded during December.  BOD concentration was 11.4 mg/l; BOD loading was 348 lbs; permit allows 10 mg/l and 125 lbs.; SS concentration was 16.2 mg/l; SS loading was 497 lbs.; permit allows 10 mg/l and 125 lbs.  Due to heavy rainfall in December the wastewater plant exceeded permit limits.  The pumps at Marcy St.; Northside, Southside, Southeast, Southwest and Meinig Ave. lift stations ran a total of 1340 hours with no significant problems.

STREETS & STORM – The street sweeping contractor spent 73 hours sweeping streets and collected more than 40 tons (70 cu. yds.) of debris, covering 241 lane miles. The stormwater system responded well during the heavy rain events; we had crews out checking trouble spots during the heaviest rains and most of the problems were caused by storm drains blocked by leaves and debris from the wind storms.

PARKS, BUILDINGS AND GROUNDS –  More trees blew down at the east end of the Tickle Creek Trail with each storm event, however few of them fell on the trail itself.