Surveys, documentation reviews and direct observation on the building sites point to a number of "exposures", which can have a negative influence on the sewerage's projects completion. Such exposure occur at every stage of the project. The most important among them are errors in the construction project, materials' defects and damages and disadvantageous meteorological conditions. They cause a high level of quality, schedule and cost risk. Risk response development can lower the level of risk. In this paper a risk response matrix was used to achieve this purpose. This technique is used in a risk management plan. The activities, which allow the achievement of a lower frequency of risk and reduction in their consequence have to be determined by this technique. This paper indicates that activities based on risk avoidance and mitigation have their best application in sewerage's projects. These include: tightening contractor selection's criteria, a detailed contract and contingency reserves. Analysis of risk response development indicates that to lower levels of quality, schedule and cost risk throughout a project suitable action should be taken as early as at the planning phase and the contract stage.
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