4027 4TH ST SE 2018-01-01 MF Import

ATTACIIM&NT "a", p. 3 (7) Mooring Piles for Surface Aerators.--Most of the existing mooring for aerators in the aerated lagoon are in need �f replacement. As part of the Stage I improvements, a total of 25 mooring sites, or 95 new niles, saill be installed in the aerated cells. ' (8) Environmental Mitigation.--To compensate for wet- lands used in the construction of the Stage II.facilities, the City proposes to reconstruct a wetlands habitat at the southeast side of the aerated lagoon. The reitigation site will cover a total area of 13.3 acres; the site will be dredged and filleci to provide ponds, rush, cattail, and slder/shrub environs. (See Attachment No. 4, Sheet No. 5.) Despite the filling and dredging activities, the site will not experience eny appreciable changes in e:evation. The 13.3 acres of restore� wetlands is intended to compensate for the use of the entire prism of land located bet�aeen the west side of the aerated lagoon and the 200-foot shoreline setback (Attachment No. 4, Sheet No. 2). (9) Fences and Cates.--To secure the new and existing treatment plant facilities, the City will erect fences and gates on either side of 4th Street N. E. Public access to �th Street itself will not be precluded. (10) flydraulic Structuc`es.--The City also proposes to construct a pipeline system along the center and northwest dikes of the aere>ted lagoon. These pipelines will be used to channel influent to the mechanical facilities planned in Stage II. Construction of Siage I elements is scheduled to com- i�ence in December, 1987 and end in June, 1988. Stage Two The second stage o� Everett's expansion project consists of the desigu and construction of a 16 mgd trickling filter/solids contact process (or mechanical secondary treatment process) to run parallel to the existing la�oon-based system. The fucilities labelled "new" in Sheets t�o. 2 and 4 of Attachment No. 4 are proposed to be built between July, 1988 und April, 1990; those labelled "future" will be added sometime over the next !.8 years, depending on need. Combined, the iew and future nechenicnl facilities wi11 accommodate pro,ic.ted influent volumes through �005.