Abstract

A level of service (LOS) evaluation is a condition assessment to determine the stormwater system’s level of performance with respect to site-specific numeric criteria. These LOS criteria can be used as benchmarks to gage the performance of existing systems and facilitate proper management decisions concerning the administration, operation, maintenance, and capitalization of stormwater assets. This chapter presents a brief background on general asset management for stormwater systems and some of the concepts and philosophies of establishing LOS standards/objectives. These concepts are exemplified by case studies highlighting various practical applications of LOS evaluations, including corroboration of observed system behavior, verification of model results, and an identification of existing system deficiencies and problem areas.

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