MILL STREET BRIDGE OVER MILL RIVER

Amherst, Massachusetts

Design of a 40 foot single span bridge replacement with a prestressed concrete deck beam superstructure.  Services included realignment of a section of Mill Street, scour countermeasures and inspection of the Factory Hollow Dam just upstream of the bridge. Client: MassDOT

I-495 BRIDGE REPLACEMENTS

Andover/Lawrence, Massachusetts

Replacement design for six three span bridges with single span integral abutment bridges.  Bridges are designed to accommodate a future fourth lane on I-495.  Services also include major modifications to the horizontal and vertical alignment of approximately one mile of I-495 and ramps to accommodate construction phasing, wider shoulders and the future fourth lane.

ASPHALT AND ROCK CRUSHING PLANTS

Structural Analysis and Foundation Design
Various Locations

Structural engineering for upgrading existing and construction of new rock crushing, bituminous concrete and cement concrete plants.  Projects include garages; storage buildings; containment and foundations for tank farms; foundations for silos and equipment; retaining walls and steel framed towers supporting conveyors, bins, silos and other crushing and vibrating equipment.  Over 100 assignments have been completed to date.  Pictured above is a screen tower in Santiago, Chile. Client: Engineering Technologies Group, Inc.

MIRANT CORPORATION POWER PLANTS

Foundation Design
Maryland and Virginia

Design of 16 foundations for transformers, containment systems and power generating equipment.  Pictured to the right is an equipment foundation at the Dickerson Power Station, Dickerson, Maryland. Client: Shaw/Stone and Webster,

MASSACHUSETTS INSTITUTE OF TECHNOLOGY

Structural Analysis and Design
Cambridge, Massachusetts

On-call task order assignments including analysis/modification of floors and roofs and foundations for equipment installation and other miscellaneous structural tasks.  Pictured is a design-build project which included the walkway and platform for the MIT nuclear reactor building. Client: Massachusetts Institute of Technology.

BOSTON WATER AND SEWER COMMISSION (BWSC) PARKING GARAGE

Structural Analysis for Rooftop Solar
Boston, Massachusetts

Chappell Engineering Associates analyzed the roof of the parking garage for its ability to carry dead load, wind load and snow loads for a proposed solar photovoltaic array.  A report was issued to summarize findings and recommendations.  Client: Fischbach and Moore, Inc.

MARLBOROUGH HIGH SCHOOL

Structural Analysis of Roof Systems

Analysis of roof capacity for additional insulation and snow loads. Included seven different roof systems. Client: Marlborough Department of Public Works.

INSURANCE AND DAMAGE INVESTIGATIONS

Various Locations, Massachusetts

Inspections, repair designs and cost estimates for structural damage to residential and commercial buildings at 14 locations.  Pictured above is roof damage due to snow loads.  Client: Vertex Construction Services, Inc.

EXPERT TESTIMONY AND INSURANCE EVALUATION

This case involved excessive deflection of floors in the Common Building of a continuing care retirement community development.  Services included site visits and condition survey; oral and written testimony; structural analysis and reports; development of repair procedures and cost estimates.  Chappell Engineering also attended numerous meetings and mediation sessions involving the architect, contractor and developer and their attorneys and insurance representatives. Client: Michenzie and Sawin, LLC