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The original item was published from 8/25/2023 9:42:00 AM to 8/25/2023 9:43:15 AM.

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Project Management - Spotlights

Posted on: August 25, 2023

[ARCHIVED] CIP Water & Wastewater Update

Water Tower

The Project Management group works in conjunction with Public Works and Engineering to design and construct improvements to the existing water and wastewater supply, distribution and collections systems as well as creating new supply and distribution infrastructure. For the FY2023-2027 period, water system improvements represent the single largest program with $188.19 million in projects to be funded. The wastewater program follows closely behind with $136.73 million over the same period. League City currently operates ten booster pump stations, four elevated storage tanks, nine groundwater wells, two wastewater treatment plants, 76 lift stations plus all the thousands of linear feet of water mains, sanitary sewer mains and sanitary force mains that connect everything together. 

The Project Management group is currently working on several maintenance and new construction projects for water and wastewater infrastructure in varying stages of study/evaluations, design or construction. Below are updates from our on-going projects.

To learn more about projects that impact your neighborhood, explore our Interactive Project Map or view the 5-Year Capital Improvement Plan.

 

Construction

36-Inch Water Transmission Main from SH3 to SSH Booster Pump Station 

Installation of 17,730 linear feet of 36-inch water supply transmission line will provide an alternative connection from the SH 3 Booster Pump Station to the South Shore Harbor Water Storage and Booster Pump Station. This line will improve water supply to the East side of the City’s water system by providing a third crossing of Clear Creek and provide water system supply redundancy.

The contractor has two air release valves left to install in the Edgewater Community in Webster, which are expected to be delivered and installed by the end of October 2023.  The contractor completed installation of the 36-inch waterline under SH 3 and the waterline in an area near the Old Galveston Road.  They have also completed an underground crossing of the waterline at the Genco Canal and the jack and bore work at Davis Road and FM 270.  The next major phase of the project, which is approximately 50% of the work, is the installation of the fusible PVC pipe.  TCH, the City’s drilling contractor, mobilized to the first drill site on May 22nd.  Drilling operations of 2,400 linear feet of fusible PVC are complete for this first drill from Shore Harbor Booster pump station and extend to Marina Bay Drive. Preparations for the second drill operation at the Nature Center to the Edgewater Community began in June and completed on August 21st.  The 3rd and final drill from the Nature Center to Davis Road will begin in September and complete in early November.  Due to these activities, the park will remain closed through November 2023. Also, lane closures on FM 270 will begin August 28th and are planned to remain in place until early November. A change order for utility conflicts and unforeseen field conditions is being prepared and is anticipated for Council presentation in September.

SSH 2MG & Alabama Elevated Storage Tank and Meadow Bend Ground Storage Tank

As part of the Annual Water System Improvements in the CIP program, storage tanks are prioritized for rehabilitation due to corrosion, mineral deposits, and equipment upgrades. This year, the South Shore Harbour Elevated Storage Tank (EST), the Alabama Elevated Storage Tank (EST), and the Meadow Bend Ground Storage Tank (GST) will receive an exterior coating, interior coating, structural inspections, UV exterior coating, and potential structural repairs. 

All tank renovations are complete with punch list items complete at South Shore Harbor and Meadow Bend. The Meadow Bend tank had to be drained and pulled off-line as an unexpected leak appeared, but City staff worked to have emergency repairs made and the tank was placed back on-line.  Contractor is cleaning up the site at the Alabama EST and the City’s Public Works department is currently checking pumps to put tank back in operation. 

Main Street Waterline Replacement Project I 45 to Palomino Dr

This project will replace nearly 1.5 miles of existing 10-inch waterline along the north side of FM 518 from I-45 to Palomino Lane with a 12-inch PVC waterline. The increase in diameter will provide additional capacity for future needs. 

Waterline installation is complete. Testing and chlorination completed in July with substantial completion granted on July 14th.  The contractor is working on site cleanup and punchlist items. It is expected closeout will be in September.

Meadowbend 16’’ FM Replacement

As part of the city’s Annual Sanitary Sewer Rehabilitation Program, this project will replace approximately 7,300 linear feet of existing force main along FM 518, between Louisiana Avenue and South Shore Boulevard to the Meadowbend Lift Station Site. The new 16’’ force main alignment will start at the lift station and run west along the city’s drainage ditch towards Meadow Parkway to FM 518, and then west along FM 518 to a discharge manhole near Louisiana Avenue. 

Installation of the force main has been completed and tie ins to the existing force main were completed the week of July 25th. The old force main has been plugged and abandoned in place. General construction cleanup has been on going. A substantial completion inspection will be scheduled for Wednesday, August 30th.  Close-out phase will be ongoing in the following weeks.

 

State Highway 3 Lift Station Upgrade & Force Main Replacement Project

This capital improvement project will rehab the SH 3 at SH 96 lift station and replace a brick discharge manhole and approximately 310 linear feet of existing 10-inch asbestos concrete (AC) force main along SH 3 between the manhole and the lift station. The project includes coating the interior of the wet well, replacing all existing piping, suction, and discharge equipment, and installing new submersible pumps and controls. Existing piping is currently located inside the dry well section of the lift station, but all new piping will be located above ground, thus eliminating the current confined workspace. New stainless-steel electrical panels, including a generator plug-in connection, will be included in the lift station upgrades. 

Bypass pumping operations were put in place in early June. Demolition of the lift station piping and electrical components has been completed. Pavement within the lift station site has been completed. Posts for perimeter fence have been installed and the 20-foot rolling gate is currently being fabricated by the contractor’s supplier. Lining of the interior well is forecasted to be complete in the next couple of weeks. Mechanical piping is currently being fitted and will be complete in the following weeks. Construction duration is scheduled to complete by December 2023, barring weather or unforeseen delays.

 

South Shore 1 & 2 Lift Station Improvements 

The project will rehabilitate and rebuild the South Shore #1 and #2 Lift Stations, both of which were constructed in the early 1980s and are critical stations serving large areas of the city. Over the last decade, the stations have flooded several times and have lost electricity during tropical weather events, causing them to shut down and not operate.  This rehab project will enhance the operability, reliability, and safety of both stations. 

Close out phase documents were recently submitted by the contractor for Project team review.  All punch list items have been corrected. Project is expected to be finalized in the next couple of weeks.

 

Glenn Cove LS Dry Pit/Wet Well

The Glen Cove Lift Station Conversion Project consists of structural modifications of the existing dry/wet pit configuration to create a standard submersible lift station. Project scope includes installation of new submersible pumps and associated piping, electrical units and controls, hatches and safety grates, discharge piping and valves, and recoating the wet well. 

City Council awarded the construction contract to Matula & Matula Construction, Inc. in June 2022. Contract time for the construction is 320 days and has been extended 242 days for delay in materials. All demolition activities have been completed. City Council approved a change order on July 25th to perform major rehabilitation work and recoating of the wet well side walls as their condition was worse than expected after blast cleaning operations concluded. The contractor is currently working on restoration activities and new equipment installation. Construction is estimated to be complete September 2023.

DSWWTP SCADA Upgrade Project 

Functional System Control and Data Acquisition (SCADA) systems are required to monitor, control, collect data, and ultimately integrate the multitude of process functions throughout the many treatment components of a wastewater treatment facility. This project replaces and updates all software and hardware related to the fiber looped SCADA system that serves the Dallas Salmon Wastewater Treatment Plant (DSWWTP). 

Prime-Controls continues to procure equipment and programming of software activities continue. Loop checks were performed, and they have a list of the signals that have passed and failed. Prime is going to check these signals for further testing. The DFS system gateway will be updated.  The HMI servers are in place and all licenses are updated. Currently the lift station pumps 1-5 are running in automatic mode.  The contractor has requested additional time to complete the project due to staff shortages and material availability with vendors.

 

Dallas Salmon Wastewater Treatment Plant RAS Pump Improvements 

The RAS pumps are an integral part of the activated sludge system, the purpose of the pumps is to manage solids levels in the aeration basins and secondary clarifiers to ensure optimum treatment efficiency. This system must be reliable and meet the peak flow demand. This project will provide modifications and replacement of the six existing horizontal end-suction RAS pumps, removal and replacement of associated suction and discharge piping, as well as replacement of the RAS pinch valve, including a maintenance bypass loop used to control the RAS flow to the aeration basins.

All work at RAS pump areas one and two is complete.  Wharton – Smith to schedule a 20” bypass and coordinate with Plant staff for this activity.   The bypass is scheduled to occur in the month of September pending coordination with plant staff. 

15” Willow Branch & 18” FM 518 Gravity Line Replacement 

Construction of these improvements will increase the size of the approximately 1,400 feet of existing 18-inch sanitary sewer along FM 518 to 21 inches and increase the size of approximately 1,800 feet of existing 12-inch sanitary sewer along Washington Street and Willow Branch Drive to 15 inches. The upsized gravity lines will adequately convey existing and projected peak wastewater flows through the year 2037, as projected by the City’s Wastewater Masterplan, and will help maintain regulatory compliance regarding sanitary sewer overflows.

Council awarded the construction contract to T-Construction on April 25th. The Pre-Construction meeting was conducted June 1, 2023. Contractor mobilized July 17th and is exploring bypass pumping locations and applying for their traffic control plan approval with TxDOT on FM 518. Construction is anticipated to continue through March 2024.

Bidding

Dallas Salmon Wastewater Treatment Plant - Operations Building 

The Dallas Salmon Wastewater Treatment Plant (DSWWTP) became active in the early 1980s and is the largest treatment facility in Galveston County, serving approximately 80% of League City’s current service area. The original operations building at Dallas Salmon was demolished four years ago due to numerous issues, many of which were exacerbated during Hurricane Harvey. Architectural plans for a new 10,000 square foot Operation Center were advertised for construction on November 10, 2022 and one bid was received on December 20th.  The single bid was rejected via Council action on February 14, 2023 due to lack of competitiveness as required by the grant funding slated for the project. 

The project was re-advertised in May 2023 and three bids were received on June 15th.  The construction contract was brought before Council on July 11th and failed to pass for award.

Design

There are several projects in varying stages of design. 

The Calder South (Well, Generator & BPS), formerly called Westside Well & Booster Pump Station, will provide additional water supply to the City’s water distribution system and a redundant water source to Bay Colony and south-central areas of the city. During evaluations of the water infrastructure for the updated Water Master Plan, the proposed scope of this project was revised and expand to consist of a new groundwater well and 4,500 gpm booster pump station located on Calder Road along with a connection to the waterline transmission line from the TMWTP. The scope includes construction of a new pump building with miscellaneous piping, pumps, electrical equipment, and controls as well as a new chemical feed system, a 1.0MG ground storage tank, SCADA system, generator, and a Water Meter Base Station for GCWA. The project has also been renamed Calder South (Well, Generator & BPS) with design funded in 2024 and construction in 2026.
 

The Pecan Forest, Highland Terrace, Clear Creek Heights Subdivisions and Boden St and Berns St project is part of the City's ongoing program to systematically replace our aging water distribution system. In these neighborhoods, staff identified approximately 23,000 linear feet of waterline as high priority for replacement/upgrade, due to aged and deteriorated waterlines, undersized small diameter waterlines, ongoing maintenance issues, and/or to update pipe material. Engineering requested waterline replacements along the additional street of Abilene be added to the project and a professional services amendment was approved in mid-March. Comments from the 90% submittal have been returned and the consultant is working on finalized plans.

The Mary Lane and Tallow Forest Service Area Connection will connect existing 8" waterlines to the City water system as they were previously served by WCID #1. Surveying is complete. The scope has been revised to add force main relocation from FM 517 & Mary Ln to Hobbs and Wikiup St. 60% plans have been submitted and are currently under review.

The East Main 24" FM Replacement is the FY 22 design selected for an annual program consisting of the engineering evaluation and strategic rehabilitation of sanitary sewer systems as identified as a priority throughout the City. The project will replace approximately 5,300 L.F. of an existing 24-inch diameter sanitary sewer force main constructed in 1981 serving the East Main Lift Station. The existing 24-inch force main is located along FM 2094 (TxDOT ROW), crosses FM 2094 and runs south of Bayou Brae Subdivision, crosses Robinson Bayou (Clear Creek), and runs along Coryell Street until it crosses FM 270 (TxDOT ROW) and discharges into the manhole that is located on southeast corner of FM 270 and Coryell Street. Coordination with TxDOT and U.S. Army Corps of Engineers (USACE) for approval to install the proposed force main replacement will be required. 90% design plans were submitted in early August and are currently under review. Environmental studies are currently being performed as part of the Nationwide US Army Corps of Engineers permit.
 

The Jarbo Bayou Force Main Replacement scope includes replacement of the existing 6" force main encased in concrete through the bottom of the channel from the discharge of the Harbor Park 3 Lift Station to an air relief valve on the opposite side of the Bayou to avoid possible breakage and contamination of the Bayou. New line will be adjacent to the existing force main and placed in a casing across the Jarbo Bayou. Survey is completed. Project status meeting was held in late April and initial design submittal was reviewed. 60% design plan comments have been returned to the consultant to be addressed in preparation for the 90% submittal.

Annual Odor control improvements are a part of the CIP. Smith Lane and Butler Road LS Odor Control were the projects identified for design and construction in FY 22/23. Improvements planned are removal and replacement of the odor control units for the Smith Lane and Butler Lift Stations as well as modifications to the piping, structural and electrical and instrumentation. The fence will also be modified/replaced, and site work designed for the expanded Butler Lift Station site. Design is currently at 90%.  Sander Engineering is working on the 90% DRC comments and preparing the 100% plan submittal.
 

The city completed a Reuse Feasibility Analysis in 2014. Since completion of that study, the city has taken actionable steps to reduce potable water consumption within the City while increasing “reuse” customers. A contract to update the 2014 study was awarded by Council in May 2022. The report will be done in four phases which include: data collection and analysis; identifying potential users and subsequent planning and cost to serve; development of an implementation plan; and final report and exhibit production. Data collection and analysis is currently ongoing. The consultant has held several workshops to discuss data findings and coordinate with the city. The final workshop was held in August 2023 and the report is being finalized.

 

The Harbour Park 1 LS Expansion was identified in the 2018 Wastewater Master Plan and further evaluated in a Feasibility Study performed in early 2023. The study was conducted to assess the current condition and define the scope for the project to increase the firm pumping capacity of the lift station from 1.6 MGD to 3.0 MGD. The study also looked at a possible increase in the size of the incoming gravity sewer from 18” to 21”. Upon completion of the Study and budget appropriation, staff opted to do a phased implementation of improvements. The initial phase will expand the station to 3 MGD, provide emergency power and remove and replace 45 feet of 18” gravity sewer with 21” line in front of the station. The proposed improvements will reduce surcharging during extreme weather events and allow the City to maintain regulatory compliance regarding Sanitary Sewer Overflows (SSO’s). The final design contract was approved via Council action August 22nd.

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