Callahan Mine Superfund Site Tailings Impoundment Investigation and Stability Analysis
Brooksville, Maine
Project details
An investigation and stability analysis was conducted on a tailings impoundment at this 150-acre coastal site.

Community Revitalization, Economic Development, Environmental Remediation and Engineering
Credere Associates is an environmental consulting and engineering practice specializing in brownfields redevelopment, environmental investigations and remediation, geotechnical engineering, and hazardous building materials assessment. Founded by Theresa and Rip Patten following the acquisition of a Portland, Maine, office with history tracing back to 1989, Credere Associates serves municipal, federal, defense, and private development clients using smart growth principles to support community revitalization and economic development.
M. Theresa G. PattenPrincipal / Co-Founder
Rip PattenPrincipal / Co-Founder
Richard S. VandenbergStaff
Assists communities, agencies, and developers in evaluating and clearing underutilized properties. The practice manages assessments, plans sustainable reuse, and designs cleanup strategies to revitalize local economies.
Resolves complex contamination issues at site locations governed by CERCLA, RCRA, and TSCA. The practice provides investigation, risk assessment, and active remediation services for private and public sector properties.
Assesses soil and geological conditions to support design and construction efforts. Services include stability analysis, site investigations, and ongoing construction observation.
Identifies and manages toxic materials in structures prior to renovation, demolition, or redevelopment. Investigations address common hazards including asbestos, lead paint, PCBs, radon, mold, and universal waste.
Evaluates natural assets and guides projects through complex environmental reviews. The practice performs resource studies and ensures full compliance with federal and state regulatory requirements.
Environmental & Remediation · Defense · Federal · Government · Land Development
Brooksville, Maine
An investigation and stability analysis was conducted on a tailings impoundment at this 150-acre coastal site.
Sanford, Maine
Environmental unknowns were evaluated and addressed across more than two million square feet of vacant and underutilized mill space.
Jamestown, Rhode Island
A remedial investigation was completed for a former U.S. Naval Base located on an island in Narragansett Bay.
Brewer, Maine
A former paper mill was assessed and remediated, facilitating its redevelopment into a modular fabrication facility.