Hoikka, John G. is a privately owned earth dam located in Pierce, Wisconsin, with a primary purpose of fire protection, stock, or small fish pond. Built in 1973 by the USDA NRCS, this dam stands at a height of 28 feet and has a length of 324 feet. With a storage capacity of 26 acre-feet and a drainage area of 0.2 square miles, Hoikka, John G. plays a crucial role in managing water resources in the area.

Despite being classified as having a low hazard potential and fair condition assessment, Hoikka, John G. is subject to state regulations and inspections by the Wisconsin Department of Natural Resources (WIDNR). The dam's spillway type is uncontrolled, and it has a maximum discharge capacity of 77 cubic feet per second. With a moderate risk assessment rating, measures for risk management and emergency response may be necessary to ensure the safety and integrity of this structure in the future.

Overall, Hoikka, John G. serves as an important asset for fire protection and water storage in the region, with its construction and maintenance overseen by the Natural Resources Conservation Service. As an earth dam located on an unnamed tributary, its impact on the local hydrology and environment underscores the need for continued monitoring and management to address any potential risks and ensure the sustainable use of water resources in the area.