The main goal of this study was the detection of complex surface and internal structures of limestone bedrock over the entire area planned for urban development on the lower Eocene plateau, west of Assiut, Egypt. A 2.5D shallow seismic refraction survey provided sufficient resolution for mapping faults and karst at the scale required for civil engineering plans. "e 3D P-wave seismic velocity map was developed from integration of a series of 2D spreads recorded along a 2D grid using only inline spreads. A karstic limestone bedrock is interpreted across the study area possessing several significant material property changes that must be compensated for during engineering designs. It was found that the P-wave seismic velocities of this bedrock range from 2800 to 4500 m/s with depths to the bedrock ranging from 3 to 35 m. Some of the karstic features of the limestone bedrock associated with faulting were found. "e locations of the subsurface karstic features, which are exposed only occasionally in outcrops on the surface, must be considered during layout and design of foundations for urban projects associated with economic growth. Special care must be taken during planning of heavy structures associated with urban and industrial projects over these karstic limestone bedrock to avoid collapse or failure of the buildings. determines layer velocities and thicknesses, but also defines depths to bedrock and major structural features critical for civil engineering projects, such as construction of buildings, bridges, tunnels, dams, highways, and other projects. In this study, we found it especially useful for detecting karstic features below the overburden and structures such as sinkholes, cavities, faults, and pinnacled rockheads. "e study area measures approximately 3 km2 (Figure 1). "e site is located on a limestone plateau in middle Egypt and is considered the best location for urban expansion and construction of new suburbs and communities (Abdel Aati, 1995) for the following reasons: 1) "e site is located in a safe area, protected from the environmental pollution from the Assiut cement factory. 2) "e area is extensive and distinguished by hard soil suitable for the foundation and building. 3) "e area was not earthquake-prone, based on historical observations. 4) "is area is rarely affected by rainfalls or flash floods. 5) "e abundant natural earth resources suitable for building materials and stones, such as limestone, gravel, and sand are quarried in the surrounding areas.