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Serving the Big Bear Area Since 1974

What’s New

 

State of the art wastewater management.

State of the art wastewater management.

Recent Awards:

 

Mr. Francis Hobbs – 2013 Mechanical Technologist of the Year from CWEA DAMS

Ms. Jennifer McCullar – 2013 GFOA Budget Award and 2013 Excellence for Financial Reporting Award

Mr. Jeremy Sweeney – 2013 Young Professional Award from CWEA DAMS

Ms. Nikki Flores – 2013 Laboratory Person of the Year from CWEA DAMS

Agency Awards – 2013 Plant Safety Award from CWEA DAMS and SDRMA Safety Award presented to Chairman Herrick

 

New Projects:

Covered Drying Bed Project:

Previously, the Agency utilized an asphalt-lined drying bed to dry the Agency’s sludge and increase the percent solids prior to disposal. On average, the existing process produces sludge with a solids content of 25% (25% solids and 75% water). The existing operation is limited to summer months and on occasion may generate odors. The scope of this project included 1) installing heat exchangers on the existing Cummins generator to capture the waste heat, 2) utilizing this waste heat to heat the floor of the lined drying bed and 3) constructing a metal building to cover the existing drying bed that measures 315-feet in length and 60-feet in width. The covered drying bed building was completed on June 20, 2014 and is now in operation.

Oxidation Ditch Rotor #4 Repair:

On September 27, one of our oxidation ditch rotor shafts broke in half. The purpose of the rotor shaft is to support stainless steel paddles that mix and aerate the oxidation ditches. The oxidation ditches are where the wastewater treatment takes place. Fortunately, the failure occurred during the Big Bear Valley’s off-season and we can utilize another ditch that was out of service because of this slow time of year.

This rotor was 35 years old and has been in continuous service since 1978. Age and corrosion appear to have caused the failure of the shaft. The new shaft arrived on January 16, 2014 and was installed on January 28,2014. The cost to replace this rotor shaft was $65,000.

Lake Pump Station Replacement Project:

The Agency began this replacement project in FY 2012 and completed the majority of the project in FY 2013. The existing LPS operation includes pumping the entire sewage flow from the City of Big Bear Lake to the Treatment Plant via a 5.5 mile, 16-inch force main and is equipped with a below grade wet-well, four submersible pumps, a dry-well to service piping and the check valves and a block building to house the controls and emergency generator. The LPS wet-well was part of the original Big Bear Lake Sanitation Department treatment plant and was originally designed, engineered, and constructed during the 1950’s as part of the pre-treatment system for grit removal. Over the years, the facility went through modifications to facilitate the operation as a lift station. The majority of the controls and equipment have become obsolete and the critical components have become unreliable. The strength and reliability of the wet-well is the main concern. Based on a preliminary engineering evaluation and report conducted by Water 3 Engineering, there are numerous inadequacies and safety concerns that relate to the existing station. The project will include the construction of a new lift station adjacent to the existing station, the demolition of the existing, above-ground structure (maintain the existing wet-well structure), installation of pipeline, and the connection to the existing force main. The construction project is divided into five portions: 1) underground construction includes construction of wet-well and the installation of pipe spools, 2) installation of pipelines, 3) electrical installation, 4) building construction, and 5) existing building demolition. The underground construction portion of the project will be complete through the use of a general contractor. On the remaining portions, the Agency will serve as the general contractor and will engage the services of local contractors to complete the project.

The LPS Project is expected to have the following impact on the Agency’s operations:

Higher level of safety for employees working in the wet-well and dry-well portions: the new station will provide increased site access to work areas, an adequate space to safely perform maintenance activities, and increased ventilation within the work zones.

Increased hydraulic capacity: the existing wet-well has a capacity of 54,200 gallons the new station will have a capacity of 135,600 gallons, increased pumping capacity from existing 4.4 MGD to approximately 8.0 MGD. The existing stations hydraulic capacity is inadequate to meet wet weather flows. The new station will have adequate capacity for wet weather flows projected over the next twenty years.

Reduced maintenance activities relating to unclogging the submersible sewage pumps: the new station will be equipped with a high efficiency non-clog style pump.

Reduced electrical expenses for sewage pumping: the new style pumps have an operating efficiency of approximately 75% whereas the existing pumps have a capacity of 60%. The increased pumping efficiency will reduce electrical expensed by approximately $25,100 per year.

Improved ventilation: implementation of an odor control system and wet-well design modifications will reduce and control the potential odors emanating for the sewer lift station. Improved structural engineering and design will ensure structural integrity for approximately 100-years.

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