The contract documents, general conditions, and special provision specifications for alum treatment and proposals can be found here. Bidder proposals are due March 21, 2016.
Read about a recent local alum treatment here.
View draft resolution 16-01 here.
A public hearing will take place for draft resolution 16-01 on Monday, March 21, 2016 at 5:30 pm at the OrgSupport Offices, 1520-A Irving St SW, Tumwater, WA 98501.
The specifications for alum treatment can be found here. The schedule for bidder proposals and treatment will be updated to final specifications that will be posted within two weeks when project funding is secured. This request is a draft and has not yet been formally released.
This short video from AquaTechNex shows an example of the alum treatment process on Canyon Lake in southern California. Alum application in Canyon Lake was proposed in order to remove nutrients from the water column that contribute to algal blooms in the lake. By binding phosphorus and reducing algae growth, the continued use of alum is expected to reduce nutrient cycling and associated sediment oxygen demand in the lake sediments. The goal is compliance with the interim and final chlorophyll a TMDL targets. Alum application is also anticipated to indirectly increase dissolved oxygen in the hypolimnion as well as reduce the frequency of ammonia toxicity.
The Black Lake Special District will not be holding their regular meeting on December 18, 2015. The next meeting will be held on Monday, January 11, 2016 at 5:30 pm.
Please click here for a news release from Thurston County Public Health and Social Services regarding a swim advisory due to toxic algae blooms.
Please see below for an announcement from Black Lake Special District of an apparent successful bidder for management and oversight of an alum treatment.