Mount Morris Dam

Erdman Anthony responded to an emergency situation at the Mount Morris Dam, which controls the upper portion of the Genesee River and, since its construction in 1952, has prevented major flooding within the Genesee Basin south of the City of Rochester. An unseasonably mild winter had caused the collapse of a large section of rock outcropping along the westerly gorge area. The rockslide emptied a vast amount of rock and mud on the access road that leads to the control center for the dam. Erdman Anthony's proximity to the dam, prior survey work at the site, and ability to mobilize its survey team quickly led the U.S. Army Corps of Engineers to select the firm for the emergency survey work.

Erdman Anthony worked closely with the project team members to develop aerial mapping and digital terrain data to formulate a mitigation plan. A number of data capture techniques were discussed, including the use of terrestrial photogrammetric methods. The optimum approach proved to be a combination of conventional photogrammetric procedures and laser distant-measuring techniques. This proved to be the most cost-effective and expedient means of mapping the collapsed embankment section.

Erdman Anthony was able to photograph, survey, and complete the photogrammetric mapping in less than three weeks. The final deliverables included three-dimensional models of the remaining rock outcrop area as well as the slide configuration. The data were used to analyze the current conditions and develop a plan to prevent future recurrences. Erdman Anthony was selected to perform the post-construction survey to assist the Army Corps of Engineers and design engineer in monitoring the contractor's final remediation work. 

Project Details


Mount Morris, NY


U.S. Army Corps of Engineers - Buffalo District

Project Contact

Bryan Merritt, PSM/LS
  • Bryan Merritt, PSM/LS
  • 561-753-9723 x 6017
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