Background

In association with the Monofill Expansion project, Foth provided engineering services to MidAmerican Energy Company (MEC) for the Phase 1, 2 and 3 design, permitting, capping and closure of the existing CCR monofill at the Louisa Generating Station, Muscatine, Iowa. Services included engineering design, regulatory permitting, construction administration, construction quality assurance and post-construction regulatory reporting.

Approach

Foth used drone aerial survey technology to kick start the design efforts and is implementing innovative ideas like CCR mining and relocation, to provide the necessary gradation for stormwater runoff and an adequate footprint for stormwater controls. Foth’s construction quality assurance (CQA) services include verification of imported materials, documentation of component installation, verification of material properties, observation of constructed facilities, sample preparation and testing of materials, and assembling the data for use in developing construction documentation reports that clearly demonstrate the quality of construction and conformance to the construction documents and the CQA Plan. Foth also provides MEC with construction engineering support during capping and closure activities to address construction sequencing, material handling and placement, and on-call project revision review.
Foth served as the “eyes and ears” for MEC during these projects, ensuring construction of the partial clay cap met the regulatory requirements.

Results

Working collaboratively with the MEC team, Foth has enabled the client to maintain compliance with the Federal CCR rules and successfully navigate converting to dry ash management at the Louisa Generating Station.