Projects

Design and construct a 5MG water reservoir for Anchorage Water and Wastewater Utility. GMC teamed with DOWL HKM, DN Tanks and Alaska Mechanical, Inc. to construct a 5MG concrete reservoir and control building. GMC acted as general contractor and was responsible for self performing all civil work including pipe connections between the control building and the water main in Elmore Road and the reservoir. Also completed a stormwater collection system to collect site runoff and overflow from the reservoir and all site grading.

This project consisted of furnishing and installing coated ductile iron and PVC water main pipe all within the Port of Anchorage area for Anchorage Water and Wastewater Utility. GMC furnished all labor, materials, equipment and supervision to successfully complete the work for updating the water lines in this critical area of the Anchorage Bowl. In addition to close coordination with the Port of Anchorage businesses, it involved working in close proximity to petroleum, oil and lubrication lines owned by the major oil suppliers of Alaska as well as JBER.

GMC was the responsive low bidder and general contractor for this project that consisted of removing an existing 9’ multi-plate culvert and replacing it with a 190’ long, 18’ multi-plate culvert. The work consisted of excavating 40,000+ yards over a 600’ fill, excavating 53’ deep from original grade while keeping traffic flowing. A diversion culvert was installed to get the water away from the working area, and once the water was directed into the new culvert the bypass was removed. A new channel was formed out of rooted trees, special fabrics that wrapped soil with willows planted between the layers of fabric to build a natural stream bank to start growing on its own.

This project was performed for the Municipality of Anchorage Public Works Department and involved work within the Municipality of Anchorage and within the military reservation for Joint Base Elmendorf-Richardson (JBER). Furnish and install pipe, heat trace system, Bypass pumping of storm flows and stream diversion, furnish and fabricate thaw pipe and connect to existing storm drain pipe.

Installation of 2.5 miles of 24″ coated ductile iron pipe across municipal and state roads. Work included a creek crossing, winter construction, booster station and vault mechanical modifications, and paralleled several other major utility lines. (Pictures)

Change existing water trunk lines replacing AC pipe with 18″ HDPE, build new sewer mainline and services, relocate street, coordinate subcontractors for curb, sidewalk, paving, electric and mechanical. Maintain active vehicle traffic through the duration of the project. Traffic flow, sewer, water, power and critical communications remained in service. (Pictures)

Civil construction project that went 52′ deep to build a solid structural base for a new hospital building. The dig incised 26′ into an active aquifer where the dewatering effort went on 24/7 for 60 days. This dewatering challenge was magnified because it was above a sensitive waterfowl nesting area. (Pictures)

Infrastructure and underground utilities for a 226-lot planned development.

Remove and replace all road fill, rebuild storm drain and sanitary sewer in phased unit subdivision.

Infrastructure, utilities and street lighting. Phase VI included a horizontal bore under the Glenn Highway for sewer tie-in.

16″ water main, heavy dewatering required.

6,000 l/f of 12″ water main, job included maintaining traffic on Fairview Loop, Garden Terrace Subdivision. An 80 l/ft 30″ bore under the Alaska Railroad tracks required deep trenching techniques and dewatering 24/7 for 30 days. (Pictures)

Roads, water, sewer, storm improvements for a 92-unit housing project on Ft. Richardson administered by the US Army Corps of Engineers.