Public Notice Manager

POA-2021-00096, Johnson Slough

Regulatory
Published March 30, 2021
Expiration date: 4/29/2021

Lower Kuskokwim School District, states the project purpose is to construct a new school site outside the projected 50-year erosion limit in Napakiak. The work being proposed is to discharge approximately 14,350 cubic yards of dredged and or fill material into a total of up to 5.76-acres of palustrine wetlands to construct a school site foundation pad, sewage lagoon site pad and waste pipe, and a small road extension.  Approximately 4.2-acres would be permanently impacted.  The school site pad (2.0-acres) would be constructed adjacent to the recently completed parking area.  The pad would provide a foundation for a school building, additional parking, snow storage, water well, 100,000-gallon water storage tank and water treatment building, elevated play deck, and bulk fuel storage.  Prior to construction, a 2.1-acre area would be grubbed and cleared of vegetation to prepare the surface.  Overburden would be hauled to uplands for disposal.  Grubbed organic soil and silt would be placed on the 3(H):1(V) side slopes and seeded for final stabilization.
Construct a 1.67-acre sewage lagoon consisting of two insulated and geofabric lined cells approximately 800-feet southwest of the school pad.  A 10-foot tall berm would be built around the cells, and a 3-foot freeboard would be installed over the cells’ edges.  Grubbed organic soil and silt would be placed on the 3(H):1(V) side slopes and seeded for final stabilization. Construct a 1,000-foot long discharge pipe (20-inch diameter) on helical piles and/or timber supports between the lagoon and the school.  Also, construct a 300-foot long gravity outfall pipe on helical piles and/or timber supports between the sewage lagoon and Johnson Slough to the northwest. Construction staging and material laydown would occur on an existing gravel pad on Mission Street.  Fill material would be obtained from a previously permitted material site.  All work would be performed in accordance with the enclosed plan (sheets 1-7), dated February 2021.  The project site is located at Latitude 60.69640º N., Longitude 162.00211º W.; near the west end of the recently extended section of Mission Street in Napakiak, Alaska. Please contact Jason Brewer at (907) 753-2823, toll free from within Alaska at (800) 478-2712, by fax at (907) 753-5567, or by email at Jason.D.Brewer@usace.army.mil if further information is desired concerning this notice.
 

POA-2021-00096, Johnson Slough_PN


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