REMEDIAL DESIGN

As industrial facilities age, they increasingly require maintenance and upgrades to continue normal function. Some of this remedial work may result from deterioration of structures and equipment with time, while other reasons may include mandated regulatory upgrades and the need for increased capacity. Upgrading and remediation of physical structures typically requires expertise in civil, geotechnical, hydraulic and structural engineering, which are primary components of D'Appolonia’s engineering practice. We are often called upon to provide remedial design services in emergency situations. We have a reputation for responding quickly and for expediting the required data gathering, analyses and remedial design to limit production/operational losses. We typically provide construction monitoring services for our remedial designs.



Twin 11-foot-diameter cooling water intake pipes designed by D'Appolonia to replace a poorly functioning intake canal.



Some descriptions of D'Appolonia projects involving remediation services for power generation facilities are provided in the following:


EXAMPLE PROJECTS


Emergency Foundation Support and Long-Term Stabilization (PDF-993K)

Following the failure of some major facility foundations at an electric power plant due to the collapse of a large-diameter subsurface pipe, D’Appolonia was retained to develop and manage the implementation of emergency remedial measures to temporarily support and in the long-term to restore the function of affected structures.

Rehabilitation of Fossil Fuel Power Plant Hydraulic Structures (PDF-690K)

D'Appolonia was retained to develop designs for rehabilitation of hydraulic facilities at the Decker Creek Power Station. The work included replacement of an intake structure that was infested with clams, repair of spillway tainter gates, repair of spillway concrete, design of shore protection for the cooling reservoir and other remedial tasks.

FERC Part 12 Dam Safety Inspections and Remedial Studies (PDF-1082K)

For Hawks Nest Dam (part of a hydroelectric generating facility), D'Appolonia has performed FERC Part 12 dam inspections and provided engineering services related to remediation of scour at the toe of the spillway, repair of spalling of the face of the spillway, and resolution of other maintenance issues associated with the dam and power generation equipment.