EEIS Consulting Engineers, Inc. (EEIS) provided structural and architectural foundation design for a new pre-engineered metal building for the Dillingham Water Treatment Plant. The building was founded on concrete slab. It contained the water treatment equipment, a mechanical room, chemical storage, and a small laboratory/office. A wood-framed utilidor ran between the water treatment building and the 100,000-gallon water storage tank. The utilidor kept the pipes from freezing and allowed access to the valves at the face of the tank.
EEIS sprovided architectural/life safety design and structural engineering for the upgrade and expansion of the wastewater treatment plant. The project included the construction of three new wood-framed buildings; a 100-foot-diameter, cast-in-place concrete clarifier with aluminum dome roof; and two cast-in-concrete aeration basins. Interior modifications to the main treatment building included remodeling the administrative space; reconfiguring the testing laboratory, lunchroom, and men’s locker room; and adding an accessible bathroom. A new accessible ramp was also added at the entrance.
EEIS provided architectural/life safety design and structural engineering for a 324-square-foot building to house an emergency generator for AWWU Pump Station 10. The building was designed to have low-maintenance exterior finishes but have a residential appearance to fit into the neighborhood where it was located. EEIS also provided structural design services for two 16-foot-deep by 12-foot-diameter, underground, cast-in-place concrete vaults. One vault was a valve house; the other was a wet well.
EEIS provided architectural/life safety design and civil, structural, mechanical HVAC, and electrical engineering for a small lift station that extended Yakutat’s sewage system to serve the new YKI Fisheries Plant and the surrounding area. The lift station served as a prototype for future lift stations in Yakutat. The 110-square-foot building was wood framed with two rooms—one containing the wet well and one for electrical and electronic components. The building design used metal siding and roofing to minimize maintenance. The concrete slab-on-grade foundation was hardened, sealed, and left exposed. The interior walls of the lift station were covered with fiberglass reinforced plastic (FRP) panels. The wet well in the lift station was 6 feet in diameter and 12 feet deep. EEIS also handled permitting with the City of Yakutat and the Alaska Department of Transportation and Public Facilities.
EEIS provided structural engineering for the upgrade of two existing 14-foot-diameter by 22-foot-deep, steel-framed wells at AWWU Pump Station 20 located in the Sand Lake area of Anchorage. The dry well housed a generator, and the wet well received waste and housed the pumps. The upgrade replaced the existing steel roof of the wet well with a new precast concrete barrel and new steel access hatch. The existing steel framing that supported the roof of the wet well was modified to support the new precast concrete access barrel and steel hatch. The roof and roof framing of the dry well was replaced with new steel support framing and a fixed steel cover.
EEIS designed improvements to an agung building that housed a water booster pump and a pressure relief valve (PRV) serving the Eagle River hillside area. The project included new roofs, siding repairs, installation of moisture barriers, interior and exterior wall treatments, a new concrete foundation, and a new roof to cover the emergency generator.
EEIS provided architecture and all other disciplines of engineering design for the PDI Corporate Hangar. The hangar had 18,000 square feet of aircraft storage space and 11,000 square feet of office and support space. The civil design included the water and sewers service, which included a 600-foot extension of the sewer line to the hangar. EEIS coordinated the permitting and design with the Anchorage Water and Wastewater Utility.
EEIS was the prime consultant for a 33,600-square-foot hangar with aircraft storage and two-story office areas. The civil design services included water and sewer services to the building and obtaining permits from Ted Stevens Anchorage International Airport and utility permits from the Anchorage Water and Wastewater Utility, Alaska Communications, and Chugach Electric.
EEIS was the prime consultant for an 18,000-square-foot hangar, a 4,500-square-foot fixed base operations center, and 15,500 square feet of Class A office space on two floors. The civil design for this facility included full water and sewer service with a lift station.
EEIS was the prime consultant for the Wastewater Treatment Modules. EEIS provided architectural/life safety design and civil/environmental, structural, mechanical HVAC, and electrical engineering for the wastewater treatment system and the two modules that housed the wastewater treatment system. The truckable modules were steel framed with insulated steel walls, roof, and floors. The heart of the wastewater treatment system was a Membrane Bioreactor System with associated pumps and holding tanks.
EEIS provided structural engineering services on the design of a building to house a pressure relief valve and controls. Structural design also included a 10-foot by 14-foot by 16-foot-deep cast-in-place concrete vault. The pump station building was wood framed with metal siding and roofing. It was founded on a conventional concrete spread footing foundation.
EEIS provided architectural and structural engineering services to Shiltec on the design of a 1,450-square-foot building. The exterior of the building was covered with metal siding and roofing. The building was founded on treated wooden footings founded on an engineered gravel pad. The floor was covered with metal checker plate with seams welded to provide a waterproof wear-resistant surface. The interior walls of the facility were covered with FRP. The ceiling and walls were designed with a built-in grid of unistrut channels so that piping could be hung anywhere on the ceiling and walls. Plywood panels with a foam core were used for the walls of the building to speed construction and reduce operating costs.
EEIS was the prime consultant for two-story, wood-framed apartment building. EEIS was responsible for extending water and sewer lines approximately 1,500 feet to the two new buildings. The project included the design of a sewage lift station housed in a separate 10- by 15-foot, wood-framed building with a 20-foot-deep wet well. Electrical controls were housed in a separate room.
EEIS provided structural design for framing of the platform to support the Homer pressure relief valve (PRV) station on a steep, rocky hillside. The design included the 99 steps and six landings required to reach the station from the access road. The platform to support the PRV station was supported on 8-inch-diameter driven piles. Earth anchors were installed at an angle to provide resistance to lateral loads. The 99 stairs and six landings were framed out of steel channels and grating supported on helical steel piles.
EEIS provided architectural/life safety design and structural engineering for the design of a 1,450-square-foot water and wastewater treatment building. The building exterior was covered with metal siding and roofing. The building was set on treated wooden footings founded on an engineered gravel pad. The floor was covered with metal checker plate with seams welded to provide a waterproof wear-resistant surface. The interior walls of the facility were covered with fiberglass reinforced plastic (FRP). A grid of Unistrut channels was screwed to the ceiling and walls so that piping could be located anywhere on the ceiling and walls. Structural insulated panels (SIPs) were used for the walls of the building to speed construction and reduce operating costs. The metal roof was supported on pitched roof trusses and plywood sheathing.
EEIS provided architectural/life safety design and structural engineering for a 240-square-foot pump house that contained the control system for the sewage pumps and the boilers to heat the associated direct bury sewer lines. A 9-foot-diameter wet well extended 20 feet below grade into permafrost. The wet well acted as a large pile and was the foundation that supported the pump house. The pump house was wood framed, and its exterior was covered with metal siding and roofing to reduce maintenance costs.
EEIS provided architectural/life safety design and structural engineering for a 16- by 24-foot downtown lift station building. The wood-framed building had a concrete floor on metal pan deck supported on glulam beams and mudsills. The glulams were used to raise the floor above grade to allow free flow of air under the building. The roof was stick framed with wooden rafters and a plywood deck. In two places, the ceiling joists supported a small bridge crane system used to lift the pumps during maintenance.
As a subconsultant, EEIS provided architectural/life safety design and structural engineering for a 450-square-foot building to house the emergency generator for the Eagle River to Anchorage trunk sewer pump station. The station was located near the Eagle River Campground. The generator building was located in the campground and was designed to match the architecture used on other campground buildings. Masonry construction was used to minimize sound transmission from the generator. The floor was exposed concrete hardened and sealed. The building featured an overhead trolley and had housekeeping pads for the switchgear, generator, and day tanks.
EEIS provided structural engineering for several oil-water separators. The separators were designed for loads from heavy truck traffic on their lids. The side walls were designed for the high lateral loads generated in the soil by the high wheel loads. The separator had precast concrete lids.
EEIS provided structural engineering for a platform to support a new 1.2-million-gallon water storage tank. The design was done in two phases: conceptual and final. Conceptual designs were evaluated for constructability and cost. The conceptual design included post and pad, pile, high-density insulation, and earth-supported foundations. The foundation system that was constructed consisted of high-density rigid insulation on grade. The frozen soils under the tank and foundation were maintained with passive refrigeration by using thermal syphons.