civitasengr

Dallas Water Utilities Strategic Plan

agregorian@kitprofs.com (Civitas Engineering Group) — Tue, 03 Sep 2024 16:51:54 GMT

City of Dallas

Dallas, Texas

The Water Production Facilities Strategic Plan (WPFSP) seeks to align water production needs with other Dallas Water Utilities (DWU) strategic planning efforts and provide a holistic approach to the future operations, maintenance, and capital investments at the WTPs. As a substantial subconsultant, Civitas led the Source Water Characterization, Regulatory Assessment, Water Quality Goals, Treatment Process Performance Evaluation, and Residuals Handling Assessment subtasks, analyzing data covering multiple raw water supplies and three treatment plants, providing evaluation of current performance, and benchmarking against regulatory and utility goals. Civitas also assisted in the identification of performance limiting factors, development of short and long term CIP projects, outlining guidance on future treatment technologies, and sampling and evaluation of contaminants of emerging concern including PFAS.

Green Tee Transite Pipe Waterline Replacement

agregorian@kitprofs.com (Civitas Engineering Group) — Tue, 03 Sep 2024 15:13:10 GMT

City of Pearland

Pearland, Texas

Civitas provided design and construction phase services for the replacement of approximately 5+ miles of asbestos-cement waterline in Pearland, Texas. The project included the design of a new, upsized 6-8-inch PVC waterline and replacement of all fire hydrants along the alignment. Civitas ensured that this new waterline would provide clean drinking water to residents for years to come without interfering with existing underground utilities in the area.

Distribution Water Lines NO- DES Flushing

agregorian@kitprofs.com (Civitas Engineering Group) — Tue, 03 Sep 2024 15:13:10 GMT

City of Houston

Houston, Texas

City of Houston conducted a pilot test using the Neutral Output Discharge Elimination System (NO-DES) to perform flushing and filtration services in selected portion of D73 distribution system. The aim of this test was to remove sediments and deposits from the water mains the selected areas to improve the aesthetic water quality for the customers. Civitas assisted the City in developing a pilot test plan and submit it to Texas Commission on Environmental Quality (TCEQ) for authorization. After the approval from TCEQ, Civitas coordinated and provided oversight for the 5-day flushing process and documented findings in a Pilot Test Report.

Northeast Water plant Expansion

agregorian@kitprofs.com (Civitas Engineering Group) — Tue, 03 Sep 2024 15:13:10 GMT

Houston Water Works Team

Houston, Texas

Rated capacity of over 300 million gallons per day (MGD) with a $2 billion project value. The City of Houston expanded the Northeast Water Purification Plant (NEWPP) by 320 MGD in two phases to meet growing water demands and comply with groundwater reduction mandates. The expansion, utilizing Progressive Design Build (PDB) with the Houston Waterworks Team and Civitas, invovled advanced treatment processes, extensive yard piping, and pre- and post- treatment chemical systems. Civitas' role included planning, piloting, design, permitting, BIM coordination, engineering services during construction, commissioning, construction oversight, and operator training. The project will provide high-quality water through innovative design and delivery, ensuring a robust clean water supply for decades to come.

Lake Houston Water Quality Study CWA

agregorian@kitprofs.com (Civitas Engineering Group) — Tue, 03 Sep 2024 15:13:10 GMT

Clients: Coastal Water Authority, City of Houston

Houston, Texas

The Coastal Water Authority (CWA) operates and maintains facilities of Lake Houston, an impoundment for drinking water supply. The City of Houston (COH) and CWA initiated the Lake Houston Water Quality Study (LHWQS) to assess the potential impacts of existing and proposed projects on Lake Houston water quality, particularly with regards to water treatment processes at the existing and future water purification plants. This study evaluated the hydraulic (i.e., flow conveyance) impacts of the ongoing / proposed projects on upstream and downstream channels under a range of hydrologic (i.e., precipitation / runoff) conditions.

The study evaluated the water quality and hydraulic impacts of four ongoing /proposed projects:

introduction of Luce Bayou Inter-basin Transfer flows,

dredging of Lake Houston and its tributaries

interim joint reservoir operations protocol and

addition of new flood control gates at the Lake Houston Dam.

City of Houston Storm Water Master Plan Project

agregorian@kitprofs.com (Civitas Engineering Group) — Tue, 03 Sep 2024 15:13:10 GMT

Clients: City of Houston
Houston, Texas

City of Houston has developed its first comprehensive city-wide drainage model. The goal of the Stormwater Infrastructure Model is to model the main drainage infrastructure throughout the City to better understand the capacity of the storm sewers, overland flow routes, and interaction with the channels and bayous. These models will allow the city to communicate flood risk to existing residents and improve planning for capital projects. Civitas developed two 1D-2D models for the Sims Bayou watershed in Infoworks ICM. The models were simulated for the 2-, 5-, 10-, 25-, 50-, 100-, and 500-year storm events to provide comprehensive flooding information across the city. Each storm event was simulated for 48 hours and included local Atlas 14 rainfall, offsite hydrology where applicable, and discharges and stages from the Harris County Flood Control District’s MAAPnext models. Each model was validated with flood claim data from three historical storms: Memorial Day 2015, Halloween 2015, and Harvey 2017.

Modeled 25 square miles of area, 57 miles of storm sewers, 160 miles of roadside ditches, 6.5 miles of unstudied channels, and 27 miles of studied channels. Performed model adjustments to better reflect the flooded structures. Analyzed the flooded structures and recommended solutions for the insufficient capacity of channels and storm sewers.

METRORapid University Corridor Project H&H Study

agregorian@kitprofs.com (Civitas Engineering Group) — Tue, 03 Sep 2024 15:13:10 GMT

Clients: METRORapid University Corridor
Houston, Texas

The University Corridor, served by a METRORapid BRT line from Westchase Park & Ride to the Tidwell Transit Center, was analyzed by Civitas Professionals, Inc. under HNTB Corporation. Civitas utilized HEC-RAS 2D modeling and adhered to City of Houston guidelines to assess overland flow patterns for extreme events, using NOAA Atlas 14 rainfall data to evaluate scenarios that may exceed storm sewer capacity and lead to flooding. The study incorporated effective H&H models for Buffalo Bayou, Brays Bayou, Hunting Bayou, White Oak Bayou, and Halls Bayou, validated against Hurricane Harvey (2017) and Tropical Storm Imelda (2019). Inundation maps identifying flood-prone areas were produced. Additionally, onsite drainage analysis was performed following HCFCD criteria to delineate over 200 sub-basins within the study area, employing HEC-HMS with Green and Ampt loss parameters and Clark unit hydrograph transforms. Flow hydrographs for various storm scenarios were generated to inform the storm sewer network analysis in the next phase.

HCTRA BFH Segment 4 Project

agregorian@kitprofs.com (Civitas Engineering Group) — Tue, 03 Sep 2024 15:13:10 GMT

Client: HCTRA
Houston, Texas

The project involves expanding Beltway 8 - Tollway in two phases, each covering an 11-mile stretch. The expansion was initiated by the Harris County Toll Road Authority (HCTRA) due to increased traffic volume. Civitas played a significant role in the project, encompassing advance planning, detailed design and coordination.

Key Highlights:

Purpose: To accommodate the rising volume of traffic and improving road capacity.
Scope: Widening the tollway by adding additional lanes and enhancing road infrastructure.
Innovations: The project focuses on delivering high-quality Tollway through innovative design and construction techniques.
Longevity: Ensures sustainable and resilient pavement and drainage infrastructure which are expected to last for decades.

Third-Party Review and CM&I for Bonds for a Better Bellaire 2016 Group A Phase 3 Waterline Replacement

agregorian@kitprofs.com (Civitas Engineering Group) — Tue, 03 Sep 2024 15:13:10 GMT

Client: City of Bellaire
Houston, Texas

Civitas provided constructability review of design plans and construction management and inspection of waterline replacement that included open cut and trenchless construction methods along with pavement improvements. The existing waterlines ranged from 2-inch to 10-inch diameter of cast iron and asbestos cement material, to be replaced with PVC and steel waterlines up to 12-inch diameter, with steel casing pipe when crossing TxDOT right of way. The work along Bellaire Blvd had to be coordinated with offices, restaurants, and a 24-hour urgent care clinic to schedule shutdowns at the most convenient times for the customers and ensure that water service was restored in a timely manner with minimal interruption. There were also interconnections in the water system that were not show in gate maps or record drawings so that test cuts prior to shutdown were lengthy and challenging. There was also work in residential neighborhoods with custom landscaping and irrigation system that required coordination with community organizations. Civitas ensured that the work met specifications and worked with the contractor to limit change orders. This renewed water system will provide safe and reliable service for years to come.

HCTRA BFH Pedestrian and Bicycle Facilities

agregorian@kitprofs.com (Civitas Engineering Group) — Tue, 03 Sep 2024 15:13:10 GMT

Client: HCTRA
Houston, Texas

Leveraging existing data from the feasibility phase and supplementing it with additional data, Civitas meticulously developed the design for each identified project, fostering collaboration to meet all stakeholder and agency requirements. We expeditiously developed 30% design based on preferred alternatives, using 3D modeling techniques to easily review critical areas, and progressed to 60% and 90% PS&E with detailed H&H, stormwater, traffic, and structural designs. Maintaining long-term relationships with entities like the City of Houston, HCED, HCFCD, TxDOT, USACE, private utilities, and railroad companies, Civitas ensured successful project implementation through early coordination and comprehensive review processes. We prepared construction drawings, cost estimates, and project manuals, establishing milestone submittals to manage costs through design, and conducted value engineering reviews before agency permit approvals, ensuring clear, transparent information and meeting all submittal requirements and deadlines.

Southeast Wastewater Treatment Plant Consolidation

agregorian@kitprofs.com (Civitas Engineering Group) — Tue, 03 Sep 2024 15:13:10 GMT

Client: City of Houston
Houston, Texas

Civitas provided engineering services for a two-phase consolidation of the Southeast WWTP from East haven and Sagemont WWTPs which would require expanding the Southeast WWTP capacity from 5.3 MGD to 15.2 MGD AADF and 32.3 MGD to 76 MGD 2-hr Peak Flow.

Civitas designed a new onsite submersible lift station, a new bar screen headworks facility, expansion of the chlorine contact basin, the effluent Parshall flume, and new NPW system. For Phase 1 expansion, the chlorine contact basins are being expanded to accommodate the additional flow. A new Parshall Flume structure is being added due to increased flow. For Phase 2 expansion, a new 32.5 MGD submersible lift station and a new headworks structure with dual screen system (coarse screen followed by fine screen) was designed before pivoting to a single screen design. Additionally, Civitas designed a NPW system that includes a new ground storage tank and NPW skid system.

civitasengr

Dallas Water Utilities Strategic Plan

Green Tee Transite Pipe Waterline Replacement

Distribution Water Lines NO- DES Flushing

Northeast Water plant Expansion

Lake Houston Water Quality Study CWA

Clients: Coastal Water Authority, City of Houston Houston, Texas

City of Houston Storm Water Master Plan Project

Clients: City of Houston Houston, Texas

METRORapid University Corridor Project H&H Study

Clients: METRORapid University Corridor Houston, Texas

HCTRA BFH Segment 4 Project

Client: HCTRA Houston, Texas

Third-Party Review and CM&I for Bonds for a Better Bellaire 2016 Group A Phase 3 Waterline Replacement

Client: City of Bellaire Houston, Texas

HCTRA BFH Pedestrian and Bicycle Facilities

Client: HCTRA Houston, Texas

Southeast Wastewater Treatment Plant Consolidation

Client: City of Houston Houston, Texas

Clients: Coastal Water Authority, City of Houston

Houston, Texas

Clients: City of Houston
Houston, Texas

Clients: METRORapid University Corridor
Houston, Texas

Client: HCTRA
Houston, Texas

Client: City of Bellaire
Houston, Texas

Client: HCTRA
Houston, Texas

Client: City of Houston
Houston, Texas