2-D Modeling – Northstar Hydro, Inc.

Skewed Bridge, Madawaska- Edmundston International Bridge, Madawaska, ME

The International Bridge over the St. John River between Madawaska, Maine and Edmundston, New Brunswick is being replaced. Northstar Hydro prepared the hydrology, hydraulics and scour analysis for this bridge replacement, facing the following issues: · Stakeholders represent international team, including MaineDOT, NBDOT, border control for United States and Canada, local residents, paper mill on both sides of the river, and other businesses and interests. · 2-Dimensional flow model employed. · River hydraulics see widely varying flood levels. · Simulation included existing bridge at 90 degree angle to flow and new skewed bridge. · Specific distribution of water levels over…

Design Build of Six I-95 Bridge Crossings, Hampden, ME

Northstar Hydro teamed with Cianbro and WSP on this design-build project for MaineDOT. The project involved hydraulics of Souadabscook Stream which flowed under all six bridges under varying hydraulic and scour conditions. Project involved very tight timelines, a large project team and effective conveyance of complex information to the larger team with the DB framework.

Regional Flooding Evaluation, Lye Brook, Manchester, VT

Northstar Hydro, Inc. assisted the Town of Manchester Vermont in evaluating local flooding issues associated with the area between Lye Brook and the Batten Kill. 2-Dimensional flow model of the river-wetland complex transected by several transportation corridors was developed to study flow and land use patterns. The model assisted in understanding the complex relationship between an altered stream and localized flooding. The study found that the area was an active alluvial fan 100+ years ago before the primary stream was channelized. The analysis highlighted the challenges of historic development patterns along an active stream as well as the impacts of…