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Project Updates

East Reservoir: Dam Improvments Progress 1-24-2018

Posted on 1/29/2018 by Engineering in Portage Lakes

Sand Berm Completed


Sand berm construction along the south embankment is complete. As noted previously, the berm provides the staging area for building the new East Reservoir Dam. This keeps construction work off main roads, with just a few exceptions.  

Bird’s-eye view of south embankment construction area – January 2018

Preparing the Work Platform

Starting the week of January 29, the Nicholson Construction Company, a Ruhlin subcontractor, will prepare a stable platform on the berm for the deep-soil mixing process (building of the new dam). To do this, Nicholson will mix cement along the completed sand berm, pictured above, to a depth of 12 to 16 inches below the surface of the berm. Once completed, the berm will serve as a reinforced platform for the deep-soil mixing equipment, pictured below. The work will take two to three weeks to complete, weather permitting.

Bird’s-eye view of the deep-soil mixing auger – January 2018


Deep-soil mixing auger – January 2018

What to Expect


Expect traffic patterns to remain as is, with the exception of occasional one minute delays while trucks are entering or exiting construction areas near the Clock Tower and 252 Portage Lakes Dr. Flaggers will assist with traffic flow.   

Expect noise near the Clock Tower. The sound may be comparable to jackhammering or heavy highway traffic. Work hours will generally be between 7 a.m. to 7 p.m. on weekdays, with the understanding there may be exceptions.  




Please see the Status tab on the ODNR East Reservoir, Dam Risk Reduction project page for an overview of East Reservoir Dam improvements and the answers to frequently asked questions. If you have other questions or comments, please contact Angela DelBrocco at (614) 221-2885 x18 or by email,

Go to East Reservoir - Portage Lakes Dam Risk Reduction Project page


Portage Lakes State Parks web page