In the process of working on the project, undesirable things can occur such as delays in project work that occur due to various factors such as unfavorable weather conditions, design changes and planning errors. There is also no exception in the implementation of projects with foreign loans, there are problems related to budget disbursement which can result in project delays. This study uses a questionnaire method to owners, supervisory consultants, and experienced contractors in dam construction to obtain a model for accelerating the completion of this project. The results of this study found that the 2 most dominant factors were in the main dam work category, namely extreme weather conditions and land availability in the dam construction area. The acceleration strategy used is the crashing method and the result is that the project completion is 93 days faster than the original implementation schedule. However, the consequence of this method is an increase in construction costs of 3,292,201,639.21 IDR.