Devon Power LLC received unanimous approval from the Planning and Zoning Board (P&Z) at its May 17 meeting for a one-year extension to a special permit originally granted May 20, 2014, and scheduled to expire on May 20, 2016.

The special permit and coastal area management site plan review involved dredging part of its property at 734 Naugatuck Avenue, which is adjacent to the Housatonic River and within 25 feet of the high tide line.

Paul Bukowski, environmental compliance engineer for Devon Power, said the time extension was needed to finish an environmental remediation project. Bukowski said the company was in the process of determining how to dispose of the dredged material, whether on-site or off-site. The material is temporarily being stored on the company’s site.

Bukowski said it will probably only take a month to actually move the 6,000 cubic yards of dredged material, but the approval process could take months. He said the state would make the decision of where to place the material, which has to go out for public comment.

“This is not something that happens overnight,” said Bukowski.

The Inland-Wetlands Agency granted permission at its May 7, 2014 meeting to Devon Power to process the sediment in the upland review area for the river. The project purpose was to remove metals that were found to be at levels higher than in the surrounding sediment in the river.

In other business, City Planner David B. Sulkis suggested the board review the wording for Section 10.1 of its zoning regulations, a section that describes the process by which the zoning regulations may be amended.

Sulkis said the wording needs to be made clearer with regard to proposed regulation changes submitted by outside agencies. He said the board “is under no obligation to consider regulation changes” submitted by outside agencies.

The board directed Sulkis to draft a recommendation to be considered by the board’s Regulations Subcommittee.

In the absence of subcommittee chairman John Grant, the board had no updates on proposed changes to its regulations for the allowable locations for medical marijuana facilities.