As part of a levee improvement project in Sugar Land, Texas, Stiver Engineering provided analysis and design for a three-sided shoring system with steel frames and timber lagging. The shoring was roughly 28.5 feet deep and set back in the levee with one side of the shoring system daylighting into the channel.
Division 1 of this Project consists of, but is not limited to, the following: raw water pump station including passive intake screen, intake line, wetwell, two (2) vertical turbine pumps and space for a third pump, bridge crane, and potassium permanganate feed system; cast-in-place concrete 2.5 MGD pretreatment facilities including two-stage rapid mix, two-stage flocculation, high rate sedimentation using plate settlers, and hoseless sludge collectors; 2.5 MGD (expandable to 5.0 MGD membrane filtration facility including membrane filtration treatment modules, CIP system, neutralization system, onsite hypochlorite generation system, chemical feed systems, control room, lab, restrooms, locker room, offices, break room, finished water pumping facilities (two (2) vertical turbine pumps and space for a third pump); finished water storage consisting of a 75-foot-diameter by 30-foot tall 1.0-MG pre-stressed concrete storage tank; plant control system (PCS) consisting of field mounted instruments and control devices, non-proprietary distributed control system utilizing personal computers (PCs) and programmable logic controllers (PLCs); all related site work, piping, electrical, and any other activities incidental to the completion of this Project. Division 2 of this Project consists of, but is not limited to, approximately 8,975 linear feet of 20-inch ductile iron raw water transmission main from the new Lake Hartwell Raw Water Intake on Durham Road to the existing 20-inch main on South Carolina State Highway 59 near the intersection with Fair Play Boulevard in Fair Play, South Carolina, including all related equipment and appurtenances, connections to existing waterlines and facilities, erosion control, grassing, and any other activities incidental to the completion of this Project. No additional specifications were given.
Stiver Engineering was retained by the contractor to provide structural engineering services for the design of the caisson (raw water pump station). The caisson is 16 ft. diameter by 50 ft. deep. The contractor successfully sunk the caisson in wet sand. Stiver Engineering designed the reinforced concrete caisson to be sunk and sealed underwater. This is a technique that we spent many years learning from working with contractors while sinking caissons in the saturated sandy soils of South Texas.
The purpose of the Luce Bayou Interbasin Transfer Project is to provide additional surface water supplies to end users that utilize water from Lake Houston. Additional surface water supplies will be transferred from the Trinity River to Lake Houston via the Luce Bayou Interbasin Transfer Project to meet the increased demand for surface water. There are currently no conveyance facilities to provide raw Trinity River water to the Northeast Water Purification Plant, which treats water from Lake Houston. The Northeast Water Purification Plant is vital in providing treated surface water to City of Houston customers and previous studies have shown that Lake Houston and Northeast Water Purification Plant cannot meet future demands at their current capacity. Transfer of additional raw water supplies to Lake Houston and future expansion of treatment capacity at the Northeast Water Purification Plant is required to allow for the mandatory conversion from groundwater to surface water. The Luce Bayou Interbasin Transfer Project will provide the additional raw water resources necessary to satisfy these demands. The City of Houston, Texas holds permits to divert raw water at a maximum rate of 775 cubic feet per second (approximately 500 million gallons per day) from the Capers Ridge site to Lake Houston.
The Luce Bayou Interbasin Transfer Project includes the Capers Ridge Pump Station located on the Trinity River in Liberty County, 3 miles of dual 96 inch diameter pipelines, and 23.5 miles of earthen canal system. The pump station will be located on the Trinity River. The pipeline will extend west southwest approximately 3 miles along a geological ridge (Capers Ridge). The pipeline will then outfall into the sedimentation basin at the start of the canal. The canal will outfall into the lower reaches of Luce Bayou, which flows into the northeastern corner of Lake Houston.
Stiver Engineering was retained by the contractor to provide construction consulting through a cofferdam design for the construction of the Capers Ridge Pump Station. Stiver Engineering also provided excavation plans for the installation of the proposed dual 96 inch diameter outlet piping.
A new pump station was being constructed in Houston, Texas to facilitate the widening of Interstate 10 on the west side of Downtown Houston; the existing site was on the bank of a tributary to White Oak Bayou.
Stiver Engineering provided construction consulting by designing a sheet pile braced shoring system and staged the concrete pours and reinforcing splices so the structure could be constructed.
Stiver Engineering was hired to assist in construction consulting through shoring and excavation for the installation of the Scott Street pump station. We designed the soldier pile and timber lagging shoring and the reinforced concrete ring beams to support the soldier piles. The shoring system included w-section soldier piles, horizontal timber lagging, and reinforced concrete ring beams.