Township Line Storage Dam

Project Overview

This Chester County structure was constructed in the early 1940s as a 35-ft high, clay reservoir dam for the West Chester Municipal Authority. It has been assigned to the high hazard category by the National Dam Inventory. In response to updated probable maximum flood predictions (PMF) for Chester Creek, the municipal authority decided to (1) raise the dam’s crest 5 ft for increased safety against overtopping, (2) armor the downstream face with gabions, and (3) reconstruct and enlarge the spillway. GeoStructures provided the geotechnical investigation for the project.

Subsurface information from nine test borings (performed along the crest and side slopes of the berm) was supplemented by index testing, direct shear tests, and unconfined compression tests on the compacted clay soils in the laboratory.

The dam’s condition was found to be excellent, and no seepage was detected. Stability of the heightened dam was considered under the following stages: end of construction, full reservoir, rapid drawdown, and long-term. GeoStructures’ engineers also designed the benching and blanket drain details and provided criteria for extending the spillway walls.

Geotechnical Laboratory Testing

Dam Analysis and Rehabilitation

Drilling Services and Subsurface Investigations

Our Comprehensive Project Workflow: Step-by-Step Guide

01.

Initial Consultation and Client Needs Assessment

Our team responds promptly to your inquiries, ensuring timely communication and immediate attention to your project needs. We work closely with clients to understand all project requirements, ensuring that we capture every detail and objective from the start.

02.

Development of Work Plan

Our expert project managers extend innovative problem-solving to project planning, resulting in technically-sound, cost-effective work plans to better serve our clients.

03.

Project Proposal and Agreement

We provide a detailed project proposal outlining the scope of work, fee schedule, and agreement terms. The project begins once the proposal is approved.

04.

Execution and Quality Assurance

Our highly skilled team of principals, project managers, engineers, and field staff execute the project with precision, maintaining open communication to ensure alignment with client expectations. Each project undergoes a rigorous quality check by our team of licensed professional engineers, ensuring all deliverables meet our high standards of excellence.

05.

Project Delivery and Invoicing

Upon completion, we deliver the final project and issue an invoice for the completed work, ensuring full transparency and satisfaction.