Construction Update for July 18

While prepping the sport courts for the asphalt overlay last week, City staff and the contractor discovered that the subgrade, or soil that the existing pavement is built on, is failing in some areas. Construction has paused so Associated Earth Sciences Inc. (AESI) could perform subgrade testing and provide recommendations for remediation.

This week, AESI used a dynamic cone penetrometer, or DCP, to test soil strength in five areas on the courts. A DCP device consists of a steel rod, a hardened conical tip, and a standard weight hammer. During testing, the hammer is raised to the top of the rod and dropped to drive the rod into the ground. The DCP of the soil is recorded after each blow of the hammer and correlated to standard measures of soil strength. After identifying the DCP measurement, the consultant used a t-handle probe to confirm the depth to firm soils.

Once the soil test results and remediation recommendations are received, City staff, DA Hogan, and FieldTurf will evaluate the project design and adjust as needed to strengthen the subgrade.