Sludge accumulating around lagoon inlets - spot dredging an option to save money on desludging in Carlyle, Saskatchewan
Client’s Challenges:
The Town of Carlyle, Saskatchewan's sewage lagoon' primary cell is aerated with two sewage inlets and a septage dump. The town's main challenge was unknown sludge accumulation throughout their lagoon. Their second challenge was being susceptible to sewer line backups due to sludge surrounding their inlets. Their third challenge was a limited desludging budget.
Hydrasurvey’s Solution:
Hydrasurvey conducted lagoon surveys in one cell in Carlyle, Saskatchewan.
Hydrasurvey completed a Comprehensive Sludge Survey using Sonar and GIS data analysis to map and quantify sludge volume and distribution throughout the lagoon. The survey determined that sludge had predominately accumulated around the two inlets and was lightly distributed throughout the rest of the lagoon.
Using sonar, Hydrasurvey clearly showed that without desludging the town could be susceptible to sewer line backups around the inlets. Hydrasurvey also provided the sludge volumes around the pipe inlets for budgeting of spot dredging in those areas.
With clear data showing sludge had accumulated around the 2 inlets The Town could now receive estimates for spot dredging vs entire lagoon dredging. With localized spot dredging there would be significant cost and time savings for the town.
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