The Wallace Group

NOLAN CREEK INTERCEPTOR, PHASES I-III
CITY OF KILLEEN, TEXAS

Size: 4 Miles, 18-Inch to 42-Inch Pipeline
Cost: $5M
Scope of Work: TWG was responsible for the design of 4,953 LF of 42-inch diameter Hobas fiberglass sewerline, 14 T-base manholes with fiberglass risers, 4,150 LF of 42-inch sewerline, 6,665 LF of 36-inch sewerline, 3,360 LF of 30-inch sewerline, 2,675 LF of 24-inch sewerline, 62 manholes, 3 drop manholes, 390 LF of 48-inch bore and encasement, and demolition of 2 lift stations. Complete in a 24-month timeline, this project is a success not only because the project timeline and budget was on track, but also because the City received a gravity interceptor which is virtually corrosion proof. This should extend the service life of the project almost indefinitely. This was achieved by careful evaluation of materials and a very competitive bidding process.

30-INCH WATER TRANSMISSION MAIN
CITY OF COPPERAS COVE, TEXAS

Size: 8 Mile, 30-Inch Pipeline
Cost: $3M
Scope of Work: 90% of this pipeline was within the Fort Hood military reservation. This line is now Copperas Cove's primary delivery line for the next 50 years. It includes 1,100 feet of 42-inch diameter bore and encasement of railroad and highway crossings. The project required environmental and archeological studies and clearances prior to construction. Pipeline material chosen was ductile iron. The pipeline is connected to the new joint use Killeen/Copperas Cove Pump Station No. 6. Potable water is delivered from this pump station to the Copperas Cove Turkey Run Pump Station which has undergone renovation. The pipeline was completed on-time in 270 days and within the budget.

72-INCH LAKE COOPER WATER MAIN PROJECT
CITY OF IRVING, TEXAS

Size: 11 Miles, 72-Inch Pipeline
Cost: $14.5M
Scope of Work: TWG was retained to provide a hydraulic analysis of the existing Phase I project, approximately 34 miles of 84-inch pipe, determine alignment for additional 32 miles of 72-inch pipe, design 11 miles of the 32-mile, 72-inch pipeline under the program manager of Montgomery Watson, complete a project design that delivers 65 MGD initially, and 125 MGD ultimately with another pump station, and complete the project in the 18-month time schedule.

3.0 MGD WASTEWATER TREATMENT PLANT
TRINITY RIVER AUTHORITY

Size: 3.0 MGD
Cost: $7M
Scope of Work: The Cities of Midlothian and Grand Prairie contracted with the Trinity River Authority (TRA) to construct a regional wastewater treatment plant. TRA contracted with TWG to design a 3.0 MGD treatment facility to work in connection with the existing 0.9 MGD Mountain Creek Regional Wastewater Treatment System. The facility is designed for future expansion to a 9.0 MGD plant to handle flows from additional entities and growth in the area.

REGIONAL WATER SYSTEM
CITY OF GATESVILLE, TEXAS

Size: 12 MGD Water Treatment Plant
Cost: $16M
Scope of Work: Seven central Texas entities joined together to develop a safe and reliable water supply using Lake Belton as a supply source. The project included a 12 MGD $15.7 M Water Treatment Facility, 2-70 foot diameter clarifiers, 3-1MG Pre-stressed Concrete Ground Storage Reservoirs, a 100,000 Gal Elevated Storage Tank, Chemical Feed Facilities, 6 Buildings, HVAC Systems and a DEC PDP/11 Mainframe Computer for System Control and Analysis.

CITY OF ROBINSON 1MG STORAGE TANK & 18-INCH AND 24-INCH WATER MAINS
CITY OF ROBINSON, TEXAS

Size: 1MG Storage Tank / 26,700 LF 18 and 24-Inch Pipeline
Cost: $3.3M
Scope of Work: A new 45-foot tall concrete ground storage tank will serve as elevated storage for the majority of the City of Robinson. This tank is part of a Phase II project which is converting the City of Robinson from ground water to surface water. TWG previously completed Phase I, a $7 million project which included a reverse osmosis water treatment facility. The ground storage tank will be filled by an 18-inch water main that routes through the city from the treatment plant in an area of lower elevation to the higher elevation areas across town. At the site near Interstate 35, a pump station and elevated storage tank were built. These facilities will serve the higher elevations of Robinson and will provide wholesale water service to the neighboring City of Lorena.

BELL COUNTY WCID #1 36-INCH WATER TRANSMISSION MAIN
BELL COUNTY, TEXAS

Size: 67,181 LF
Cost: $11.8M
Scope of Work: 12-mile 36-inch DIP water transmission main from Nolanville through Harker Heights and Killeen to Ft Hood. Design features include a 400 LF bore across US Hwy 190, 18 additional bores for a total of 2,000 ft in bore length, 17 creek/channel crossings and a bore across an existing railroad and right-of-way in the City of Killeen. Four separate connections to existing water tanks and pump stations. This project will increase water transmission capacity from 40 MGD to 65 MGD.

BLUEBONNET WSC RESERVOICES AND PUMPING FACILITIES
BELTON, TEXAS

Size: 2 MG and 50,000 Gallon Ground Storage Tank
Cost: $3M
Scope of Work: Bluebonnet WSC is a wholesale regional supplier in Central Texas. Water from Lake Belton is distributed to whole system customers, some over 35 miles away. A new pump station, located near the middle of the system, is designed to reduce pressure and increase the flow rate. Included in the 2 million gallon ground storage prestressed concrete tank is a computer based sampling, analyzing, mixing and dosing system to increase the dosages inside the tank. Both chlorine and liquid ammonium sulfate can be added. The system maintains the levels between prescribed limits. The design also included a 50,000 gallon steel ground storage tank at the Pendleton pumping station. The Moody pumps are vertical turbine can pumps and the Pendleton pumps were horizontal split case pumps.

CITY OF WEST WACO/WEST WATER SUPPLY IMPROVEMENTS
CITY OF WEST, TEXAS

Size: 11 Mile, 20-Inch and 12-Inch Pipeline
Cost: $2.5M
Scope of Work: This "fast tracked" project that was completed within 7 months with the use of the Design-Build Project Approach. The pipeline which supplies water to the City of West from Waco resources included R-O-W and easement acquisition of 42 easements.

DOWNTOWN WATER/WASTEWATER REHABILITATION PROJECT
CITY OF KILLEEN, TEXAS

Size: 21,500 LF, 6 and 8-Inch Pipeline
Scope of Work: This project included the design and construction administration of water and wastewater lines in the downtown area of Killeen. The project included replacing 5,800 LF of old, undersized water lines with new 6-inch and 8-inch PVC C-900 water lines; replacing 3,500 LF of old clay sewer lines with new PVC SDR-2 by traditional trench methods; 5,500 LF of HDPE DR-18 with pipe bursting techniques; and installation of 6,700 LF of new 12-inch PVC C-900 water transmission line. This project was in a congested area and through the use of Public Notices and Buffer Controls all work was accomplished with a minimum of complaints or disruptions.

CHISHOLM TRAIL SUD HWY 29, 183, & PARMER LANE AREA WATER IMPROVEMENTS
WILLIAMSON COUNTY, TEXAS

Size: 6.5 MGD Pump Station, 750,000 Gallon Elevated Storage Tank, and 5.3 Miles of 18-Inch Water Main
Cost: $5.7M
Scope of Work: Rapid growth has required Chisholm Trail SUD to implement major water transmission main improvements in the Highway 29 (west of Georgetown), Highway 183 (north of Austin-Round Rock), and Parmer Lane (near Sun City) areas. TWG has provided the Master Plan, computer modeling, and much of the engineering for these projects.
The initial projects had to be on line to serve hundreds of new houses that were under construction. These fast-tracked projects were completed on schedule. In addition, TWG assisted in easement acquisition.

WACO WATER SYSTEM STUDY
CITY OF WACO, TEXAS

Scope of Work: This study involved detailed population and water use projections. Water meter accounts were geocoded and located in the model for more accurate modeling. Roughly 48 recording meters were installed for information gathering. Over 50 fire hydrants were tested for calibration of the model. Many open valves between pressure planes were discovered during calibration. Projections for wholesale delivery to other systems were included in the study. Many major transmission lines have now been constructed. Construction is nearing completion on a long-term $90,000,000 water treatment plant quality and quantity improvement project.

2.0 MGD REVERSE OSMOSIS WATER TREATMENT PLANT
CITY OF ROBINSON, TEXAS

Size: 2.0 MGD RO Water Treatment Plant
Scope of Work: The City of Robinson, a rapidly growing city on the southeastern corner of Waco, had ten water wells with four wells already dry. The City contracted with TWG to assist them in additional permanent water supplies. This municipal system was spread over many square miles with small diameter pipes. One of several alternatives included taking water from the Brazos River, pumping this saline or brackish water into off-channel lagoons (holding ponds) and treating this water to safe drinking water requirements. This involved both conventional surface water treatment and desalting. Tests and pilot plant operations were performed and the reverse osmosis method was selected. Project planning, financing, design, and construction were completed. This municipal potable water facility was the first Reverse Osmosis facility in the state of Texas utilizing surface water as the primary source of supply.

EASTSIDE INFRASTRUCTURE, PHASE II
CITY OF KILLEEN, TEXAS

Size: 10 Miles, 16-Inch to 36-Inch Pipeline
Cost: $3.6M
Scope of Work: This project extended city utilities into a mostly undeveloped but rapidly developing area. A timely completion of this project was required to provide wastewater service and fire protection to a major municipal building (Police Department Headquarters) that was under construction. In addition, the project serves a rapidly developing residential area. The project was "walked" several times, with environmental consultants, City staff, and owners. A final alignment which included some bores to protect environmental features was agreed upon.

SANTA FE 1 MG GROUND STORAGE TANK
CITY OF WOODWAY, TEXAS

Scope of Work: TWG has designed ground water storage facilities for numerous central Texas clients. These include: Chisholm Trail SUD 1 MG Wire-wound Pre-stressed Concrete Tank at Stonewall Pump Station; Grove WSC Standpipe Rehabilitation; City of Robinson 1 MG Concrete Ground Storage Tank; City of Whitney 400 GPM Trinity Water Well and 200,000 Gallon Metal Elevated Storage Tank; City of West 350 GPM Trinity Water Well and 300,000 Gallon Metal Ground Storage Tank; Moffat WSC 1 MG Metal Ground Storage Tank; Bluebonnet WSC 2MG Wire-wound Pre-stressed Concrete Tank; Moffat WSC 1 MG Ground Storage Tank; and as shown, the City of Woodway Santa Fe 1 MG Ground Storage Tank.

EASTSIDE INFRASTRUCTURE
CITY OF KILLEEN, TEXAS

Size: 43,000 LF, 16-Inch to 24-Inch DIP; 22,000 LF 12-Inch to 42-Inch Sanitary Sewer Pipe
Cost: $7M

Scope of Work:
The City of Killeen combined several of its CIP water and sanitary sewer projects into one large project resulting in a $7 million project. This multi-phased project included the Trimmier Creek Interceptor Project and the Diversion Interceptor Project. A major $2-3 million, 9 MGD lift station was also designed, bid, and constructed concurrently. The design of 2 miles of 24-inch force main incorporated a lining of PROTECTO 401™ Ceramic Epoxy to reduce friction and impede internal corrosion. Peak wet weather measured flows were used to allocate current flows to the Lift Station. Basin maps, other lift stations, several decades of population data mapped into population densities, and long range growth were used to determine the ultimate flows. HYDRA software was used to finalize the design of both interceptors. Total design for this project incorporated two water lines, a force main and several phases of diversion gravity sewer interceptor projects of varying pipe sizes along with the demolition of two smaller wastewater lift stations. For this project, the City of Killeen and TWG were presented the Texas Chapter APWA Project of the Year Award for the $2 - $10 million project division.

DISSOLVED AIR FLOTATION WATER TREATMENT PLANT
CITY OF WACO, TEXAS

Size: 90 MGD
Cost: $93M
Scope of Work: Prime firm for a multi-phased $93 million expansion and improvement to the City of Waco's water infrastructure. The project will simultaneously increase capacity, alleviate growing taste and odor issues in finished water with the use of Dissolved Air Flotation (DAF), ozone and hydrogen peroxide, and meet emerging water quality regulations. TWG is supervising efforts of two national sub-contracting firms, as well as overseeing design, project management, and scheduling.

CHISHOLM TRAIL SUD RONALD REAGAN BOULEVARD 24-INCH WATER MAIN
WILLIAMSON COUNTY, TEXAS

Size: 27,000 LF, 24-Inch Pipeline
Cost: $3.8M
Scope of Work: After receiving a Notice to Proceed for this water main project, and in conjunction with performing the design survey work, TWG utilized One-Call locators to mark utilities and obtain record drawings from the various utility providers in the area to learn the size, type and probable depth of the utilities within the work area. TWG completed a utility impact assessment. In areas of possible conflict, Level A SUE services (horizontal and vertical location) were provided for locating a high-pressure gas line. TWG was responsible for permitting under Section 404 of the Clean Water Act. Wetlands mitigation was required and a USACE Section 404 permit was completed and approved.

WATER QUALITY AND QUANTITY IMPROVEMENT PROJECT PHASE 1
CITY OF WACO, TEXAS

Cost: $35M
Scope of Work: Reconstruction of 16 filters and design of a 90 MGD Transfer Pump Station, a Clarified Water Pump Station, the Mt Carmel High Service Pump Station that includes vertical turbine pumps, 36-inch to 84-inch yard piping, a new chemical building to feed chlorine, and liquid ammonia sulfate, caustic and fluoride feed facilities.

TRIMMIER CREEK INTERCEPTOR AND LIFT STATION
CITY OF HARKER HEIGHTS, TEXAS

Size: 2,700 GPM Lift Station / 5 Miles 16 and 21-Inch Pipeline
Cost: $3.5M
Scope of Work: This lift station / interceptor project was designed to relieve several existing lift stations, and to transfer the discharge point of the flow in the Harker Heights system. Some of the lift stations were in fully developed areas where the flows were well documented. Some were in fairly new subdivisions only partially developed. A combination of measured flows and calculated flows were used to determine the design capacity of the interceptor. HYDRA software was used to finalize the design. The majority of this 5-mile pipeline project runs through urban areas and includes two major highway crossings. Broken into three phases, this project included 3 miles of 16 and 12-inch DIP, and 2 miles of 10 and 8-inch PVC sanitary sewer pipe.