The Department of Defense, specifically the U.S. Army Corps of Engineers Research and Development Center (ERDC), intends to issue a sole source contract to Geospace Technologies Corporation for the procurement of geophones and related equipment. The requirement includes three GS-ONE, 10 HZ geophones, 24 channel seismic cables, one Geospace Connectorless Recorder, and 24 months of technical phone support, all of which must meet specific frequency response specifications to align with existing in-house equipment. This procurement is critical for ensuring the consistency and reliability of geophysical data collection, as Geospace Technologies is the sole manufacturer and supplier of these geophones in North America. Interested vendors may submit capability statements or proposals to Tam Coronel at Tam.M.Coronel@usace.army.mil and David Ammerman at David.G.Ammerman@usace.army.mil by 1:00 PM CST on May 2, 2025, although this notice is not a request for competitive quotes or proposals.