Infrastructure Engineering

OTIE provided data gathering and GPS based survey control for the Root River Sediment Transport Planning Study for Milwaukee County. As a subcontractor, OTIE developed a grid of control points for this 9-mile long section of the Root River to insure that the study tied into adjacent section corners, then set control points for establishing the river cross-sections at an average of every 250 feet. Milwaukee Municipal Sewerage District (MMSD) survey staff performed the cross sections. Much coordination was needed with MMSD as it was desirable to have control set out not-too-much ahead of the cross section crews so it would be found and intact.

OTIE performed a $1.86M groundwater and landfill gas monitoring; well-field and landfill cover operation and maintenance (O&M); and base-wide community relations and data base services for the former Moffett Field Naval Air Station, Mountain View, CA. OTIE’s monitoring and O&M activities complied with applicable Records of Decision (ROD), long-term monitoring plans, and work plans. Negotiated calculated concentration limits (CCL) exceedences for barium and copper with regulatory agencies; developed decision-tree logic for action related to chloroform CCL exceedences; and developed guidance procedures in the event that methane concentrations exceed thresholds. Twice yearly, OTIE gauged water levels in 409 wells within a single 8 hour day. GIS and modeling with compiled analytical data were evaluated and shared by uploading to the Department of Navy’s master Moffett Field database. Data management and interpretation were critical to support the Navy’s decision-making. OTIE provided interpretation and professional judgment useful for increasing program effectiveness.