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Rehabbing Manholes in Maryland

机译:在马里兰修复沙井

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摘要

Located within the Piedmont Plateau region, with its characteristic rolling hills and lush forests, this historical community's water and wastewater facilities are maintained by the Bureau of Utilities. The Bureau operates and maintains a 0.9 mgd wastewater treatment plant in Hampstead, along with 35 miles of collection lines including seven sewer pumping stations. In the Freedom District, the Bureau is accountable for the entire collection system (98 miles), which includes 11 major sewer pumping stations that feed the Maryland Environmental Services wastewater treatment plant1. Along one length of the Bureau of Utilities' sanitary sewer force mains there are nine precast manholes. The manholes, measuring 48 in. in diameter by 7 ft average deep, were in fair condition. But as with most aging municipalities, the manholes required regular attention and rehabilitation in order to eliminate inflow and infiltration (I&I) through leaking joints. This was a burden on infrastructure and taxpayers alike. The Bureau decided to seek a longer-term solution.
机译:这个历史悠久的社区位于皮埃蒙特高原地区,山峦起伏,森林茂密,其水和废水处理设施由公用事业局维护。该局在汉普斯特德经营和维护一个0.9 mgd的废水处理厂,以及35英里的收集管线,包括七个下水道泵站。在自由区,该局负责整个收集系统(98英里),其中包括11个主要的下水道泵站,为马里兰州环境服务废水处理厂提供水处理1。在公用事业局下水道总管的一段长度上,有9个预制检修孔。人孔状况良好,直径为48英寸,平均深度为7英尺。但是,与大多数老龄化的市政当局一样,沙井需要定期维护和修复,以消除由于渗漏而造成的流入和渗入(I&I)。这是基础设施和纳税人的负担。无线电通信局决定寻求长期解决方案。

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