APAI provided preliminary and detailed design phase services for Section 15-1 of the Integrated Pipeline Project (IPL). The IPL Program represents the combined efforts of Tarrant Regional Water District (TRWD) and Dallas Water Utilities (DWU) to design and construct a 150 mile pipeline connecting Lake Palestine, Richland-Chambers Reservoir and Cedar Creek Reservoir to supply water to DWU and TRWD users. The program includes multiple pipeline and pump station projects, which will be constructed in a phased capital improvement plan, with a combined estimated construction cost in excess of $2 billion. APAI design responsibilities included approximately 5 miles of 108-inch pipeline including options for steel or prestressed concrete cylinder pipe construction. Additional design tasks included environmental analysis along the full 15 mile length of Section 15-1, structural design for a pipeline interconnection and energy dissipation facility and restoration/erosion protection design for all creek crossings.