Summary List of Wastewater Engineering Experience
Our company has successfully completed environmental projects over the 40 year history of the Firm. Over the past 14 years Marlar Engineering Company has specialized in the area of practice related to water and wastewater and completed projects ranging from $100,000 to $9.0 million. Wastewater systems include sanitary sewer collection improvements, rehabilitation of existing collection systems, pump stations and forcemains, wastewater treatment and sludge stabilization. The water related projects include major pipeline distribution projects, treatment facilities, and rural water systems with over 100 miles of waterlines, standpipes, and pump stations. Two members of our firm are certified watercad modelers for Haestad Methods Watercad software and have extensive experience with Corps of Engineers 404 permitting, one member being listed with the Corps as a wetlands delineator. Two members of our Firm are certified flood plain managers.

The following is a summary listing of recent wastewater projects and experience our Firm has completed and individual experience of members of our Firm.

  • North Little Rock Wastewater Utility
    Faulkner Lake Wastewater Treatment Plant, 2004 project completion, $9 million expansion including New primary and final clarifiers with density current baffle system for 30% more Removal efficiency, conversion of existing RBC basin to chlorine contact chamber, a new Complete mix activated sludge process, flow measurement (Parshall Flume) chamber, new sludge thickeners and site plan of new facility.
    Project Cost: $9.0 million

    Various Sewer System Collection System Rehabilitation Projects
    Over $500,000 in project costs

    White Oak Bayou 36" Sewer Interceptor Projects
    Project Costs: $2.0 Million

    12" Sanitary Sewer Relocation Under Interstate 40 (20" Bore) 2004 Project,
    $225,000

  • City of Sherwood Wastewater Treatment Plants
    $1.8 million Pickthorbe Wastewater Treatment Plant and Collection System
    Treatment Plant includes mechanical screening, activated sludge process (Parkson Biolac System), tertiary filtration, UV Light Disinfection and Flow Measurement

    Collection System included SSES Study and $400,000 in upgrades

    Result: Project was brought into ADEQ compliance within 1 month after start up and has remained in compliance well under discharge limitations.

    $1.5 million Indianhead Wastewater Treatment Plant and Collection System
    Treatment Plant includes mechanical screening, Sequencing Batch Reactor process, (US Filter Jet Tech System with Jet Aeration), Post Aeration, UV Light Disinfection, Flow Measurement.

    Collection system included a SSES Study and $350,000 in collection system upgrades.

    Result: Treatment System was brought into ADEQ compliance in1998 within 2 months after start up and has remained in compliance well under discharge limitations.

  • Military Department of Arkansas
    $5.4 million Wastewater Treatment Plant and Collection System Upgrade
    In 1993, the State Military Department contracted with Marlar Engineering to design a new treatment facility and collection system upgrade to reduce Infiltration and Inflow and bring the treatment plant into ADEQ compliance. The new treatment plant included mechanical screening, extended aeration activated sludge process (oxidation ditch), 2 final clarifiers operated in either parallel or series, tertiary filtration, UV disinfection, post aeration and flow measurement. The project also included computer SCADA system monitoring flow, pH, DO, and other parameters and automating RAS/WAS valves.

    Collection system included over $2.0 million in upgrades resulting in a 70% reduction in I/I.

    A second project involved a $600,000 Sludge Biosolids system including Wetlands Plants and traditional sludge drying beds to measure the dewatering efficiency of wetlands plants compared to traditional sludge drying.

    Result: Treatment Plant was brought into compliance in 1995 within 2 months after start up and remains in compliance well under discharge limitations. The Plant has won 2 Environmental Awards from the Department of the Army National Guard Bureau.

  • City of Vilonia Wastewater Treatment Plant Expansion
    This project involves the expansion of Vilonia's 0.25 mgd treatment facility to 0.5 mgd by the addition of a new headworks including mechanical screening and grit removal, extended aeration/activated sludge basin and settling basin with the aerobic digestion, followed by chlorine contact and flow measurement. Projected cost = $1.8 million. Construction will begin in February, 2007.

  • City of Bigelow Wastewater System
    Our Firm designed complete sewer collection and wastewater treatment plant for the City of Bigelow which included a new 300,000 gpd treatment facility with the mechanical screening, grit removal, oxidation ditch with integral clarification followed by the UV Disinfection and flow measurement at a cost of $3.3 million. This project was completed in July, 2006.

  • Higgins, Wrightsville Wastewater System Improvements
    In 2006, the new sewer collection system for Higgins and Sweet Home was completed at a cost of $3.3 million which included gravity sewer lines, 12 lift stations and the expansion of the city of Wrightsville's wastewater treatment plant including surface mounted aerators, chlorination and modification of the existing facultative ponds.

  • Engineering Study - NLR Wastewater's White Oak Treatment Plant Expansion
    In 2006, our firm prepared the engineering study for the expansion of NLR Wastewater's White Oak Wastewater Treatment Plant from 4.5 to 8 mgd with the expansion of the existing facultative ponds, surface aeration, a new chlorine contact facility and flow measurement at an estimated cost of $5.5 million.

  • Fort Chaffee Sewer System Evaluation Study (SSES)
    In May, 2003, Marlar Engineering Company performed a sewer system evaluation study (SSES) of the Fort Chaffee sewer collection system recommending over $3.0 million in upgrades. The Study included preparation of a GID Map of the existing collection system, flow monitoring, TV Inspection, Visual Inspection/Observations, and a SSES Report with recommended improvements.

  • Rivana Foods Industrial Wastewater Treatment Process, Brinkly, Arkansas
    This project involves the study and design of a wastewater pretreatment system including sludge handling to reduce BOD concentrations from 15,00 mg/l to 3000 mg/l before traditional treatment to further reduce BOD concentrations to 400 mg/l before being discharged to the City of Brinkley's Wastewater system.

  • Morgan Sewer Improvement District: 3 Pump Stations, 5 miles of Collection System and Forcemain, $800,000 project

  • Highway 365 Sewer Improvement District: 1 Pump Station, 3 miles of Collection System and Forcemain, $1.1 million project

  • Two Certified Flood Plain Managers
  • Two Hydrologists
  • Wetlands Evaluations and 404 Permitting
  • Environmental Site Assessments

  • North Little Rock Water Department:
    24" Waterline Aerial Crossing
    Phase 11 Waterline Improvements
    Phase 15 Waterline Improvements
    Phase 17 Waterline Improvements
    Phase 18 Waterline Improvements
    Phase 19 Waterline Improvements
    Phase 20 Waterline Improvements
    Highway 365 Waterline Relocations
    Highway 107 Waterline Relocations
    Highway 161 Waterline Relocations
    Highway 107 Waterline Relocations Phase 2
    Pike Avenue Waterline Relocations
    Operations Storage Bends and Site Improvements

  • Water Supply Study - Future Water Source Study, North Little Rock Water Department
  • Preliminary Study - Water Treatment and Distribution System, Khabarovsk, Russia (Presented to AWWAA local Chapter and ASCE)

  • Camp Robinson Waterline Improvements, $420,000 Project
  • Camp Robinson Sodium Hyperchlorite Booster Pump Station
  • Camp Robinson Waterline Improvements Phase 2
  • Parson Water System, 100 Miles of 8", 6", 4", 3" waterlines, 3 tanks, 2 pump stations, $3.3 million