08-30-12 Special Called Meeting of the Planning and Zoning Commission

Browse Search

Wastewater Summary Little Cedar Bayou WWTP As displayed in Map 3.3, Wastewater System, the City maintains an extensive system of 36 lift stations (including the lift station Sylvan Beach Pavilion that is currently inactive) and 187 miles 12 mains and gravity sewers. The City also operates the Little Cedar Bayou th Wastewater Treatment Plant (WWTP) (see inset) located on South 4 Street at Cedar Bayou, which has a permitted capacity of 7.56 mi gallons per day (mgd) by the Texas Commission on Environmental Q (TCEQ). The existing wastewater treatment plant was designed in 1980 and Source: City of La Porte Website, Department of Public Works. service in 1982. The plant was expanded in 1986 and again in 201 These expansions allow the City to treat approximately 21.8 mgd peak two hour period (usually during large storm events). At present, the City treats an average 3.2 mgd (calculated as an average daily f 2010), which puts the plant at about 42 percent of its permitted capacity . With the latest round of improvements, 13 -out population. In addition, the City also still contracts with the Gulf Coast Waste Disposal Aut (GCWDA) at a negotiated fee, currently $0.20 per 1,000 gallons, 0.5 mgd. Post treatment, the majority of the water is released into the L Texas Commission on Bayou. However, during certain times of the year, particularly s Environmental Quality (TCEQ) City utilizes a maximum of 600,000 gallons per day (gpd) to irri regulations require that a wastewater permittee commence Forest Golf Course and the soccer fields at Little Cedar Bayou P engineering design and financial planning for expansion when a The City has been proactively monitoring and replacing aging plant reaches 75 percent of infrastructure. Currently, the City has budgeted approximately $ permitted average daily flow for a per year to reduce inflow and infiltration (I/I) problems in the consecuteive three-month period. collection system. Over time, pipes, valves, and manholes start This rule further requires that the deteriorate consequently, allowing the inflow and infiltration o permittee gain regulatory approval stormwater/groundwater into the wastewater collection system. Th and begin construction of increases the volume of wastewater that has to be treated by the expanded facilities when a plant The additional volume also increases the wear and tear on plant reaches 90 percent of the infrastructure and can prematurely cause the City to unnecessari permitted average daily flow for a funds on plant capacity increases. The City has also been proact consecutive three-month period. replacing, consolidating, or eliminating its lift stations. As l City had 40 lift stations; today 36. In 2003, the City commissio Source: TCEQ. station evaluation study to determine the highest priority projey 2008, four out of five of those projects were complete. The City 12 City of La Porte Website. Retrieved on 10/12/11. 13 Interview with the City of La Porte Public Works Director. 3.9 2. | Adopted July 20, 2009