REHABILITATION OF A STORM WATER RETENTION BASIN AND PUMP STATION

Raymond K. Will
2001 Journal American Society of Mining and Reclamation  
An area of tidal lands along San Francisco Bay was mined previously for sand and gravel to provide aggregate materials for the construction of military bases and highways. As the area became urbanized the quarries encountered difficulty operating within increasing environmental regulations. The land values increased and many operations were re-developed for residential and commercial construction. Drainage of storm water to prevent flooding and inundation was provided through the creation of
more » ... the creation of drainage assessment districts. The districts are funded by assessing special taxes on properties within the district. This paper focuses on a situation at a specific site that has been negatively impacted by the operation and management of the drainage facility. The district constructed a drainage system of stormwater sewers, canals, a detention basin and pump station. Following construction of the facilities insufficient maintenance of the system has resulted in inundation of private properties. The properties contained land previously classified as upland, which now has become wetland and as such comes under the jurisdiction of the U.S. Army Corps of Engineers and attendant regulatory controls. Development of the property is also hindered by public sentiment over the "new" wetlands. The property owner filed suit against the drainage assessment district claiming unlawful taking of the land. In settling the lawsuit an effective rehabilitation plan was designed by engineers representing the assessment district and the property owners to solve the problem of excessive sedimentation and ineffective pumping. Excavation was initiated recently and the project is proceeding. A series of drawings and photographs of the dredging operations and installation of an auxiliary pump system will be provided. Additional
doi:10.21000/jasmr01010356 fatcat:ekd76dfjqzagfnvubbxbj2iwp4