Donohue Engineering, LLC

Civil Engineering and Construction Inspection Services

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Donohue Engineering provides hydrologic and stream hydraulic analysis on many of its projects.  Stormwater hydrologic analysis is performed on all site planning projects to analyze increases in runoff and best management designs to calculate aboveground or belowground detention/infiltration basin designs.  Stream hydraulic analysis is used in determine the effects of projects on downstream water surfaces for bridge replacement projects and also to determine flood plain limits.   Donohue Engineering has obtained numerous NJDEP FLood Hazard Permits for various types of projects.


Hydrologic and Stream Hydraulic Analysis 

  • Lake Rickabear Dam Breach Analysis, Kinnelon, NJ Donohue Engineering provided full hydrologic and hydraulic stream analysis for this project which involved the analysis of the Girl Scouts of America Lake Rickabear Dam Breach and its downstream effect on Lake Juliet and on and existing residential community. The analysis determined the classification of the dam as “Significant Hazard Potential” or class II by using the ½ Probable Maximum Precipitation (17” rainfall) event. The total drainage area of the analysis is 2.967 sq. miles. NJDEP Dam Safety provided agency review and acceptance of the Lake Rickabear Dam Breach Analysis.
  • ​​​​​Rehabilitation/Replacement of Five Bridges in Middlesex Co., NJ. Donohue served as Project Manager for this project which involved the preparation of preliminary and final contract plans, supplementary specifications and NJDEP Major Stream Encroachment and Freshwater Wetland General Permits required for the rehabilitation of four bridge and culvert projects including a 130' long concrete and brick tile archway and for the replacement of a 55' long bridge.

  • Replacement of 14th Street Bridge, Folsom, Atlantic County, NJ. Mr. Donohue served as Project Manager for this NJDOT design/build bridge replacement and roadway reconstruction project involving the preparation of preliminary plans,  environmental permitting and utility investigation.

  • Reconstruction of West Crescent Avenue Bridge over Ramsey Brook, Allendale NJ  Donohue served as project engineer responsible for hydrologic and stream hydraulic analysis and the preparation of environmental permits including NJDEP Major Stream Encroachment and Freshwater Wetlands and SESC Certification for the project.