Tertiary Filter Rehabilitation Project - Town of Dyer, IN (2009)

We are very satisfied with the project results. Capacity and reliability of the North Tertiary Filter systems has been completely restored to control plant effluent turbitities.

Plant Superintendent Jeff Dzurovcak Three steel filter cells, manufactured by Hydroclear and installed in 1980 in the Dyer, Indiana, Wastewater Treatment Plant, North Tertiary Filter Building, had deteriorated significantly. Underdrain systems had failed, steel filter cells and piping were corroded, feed pumps and backwash pumps were in need of replacement and control systems no longer functioned properly.

NIES Engineering, working closely with Siemens Technologies who now manufactured the Hydroclear Filter systems, provided engineering services to rehabilitate the tertiary filters. Rehabilitation of each 171 sqft filter cell included, interior sandblasting and painting, installation of improved underdrain systems, and replacement of several key filter components including sand media, air mix piping and diffusers to restore enhanced backwash capability, corroded filter trough weirs, level sensors, solenoid valves, and 12 pneumatically operated butterfly valves for filter operation and backwash control.

Two existing pump and backwash control panels were replaced with one new, PLC based, control panel integrating automatic filter, pump, backwash, air mix, pulse mix and chemical grease clean operations. The project replaced 2, 2250 gpm backwash pumps and 3, 800 gpm feed pumps and their related suction and discharge control valves. A new process water skid was also provided complete with 3 variable speed pumps, upgraded from 60 psi to 80 psi process water capability.

In the original design, 3 pneumatically operated, 14-inch filter effluent control valves had been located outside the North Tertiary Filter Building. Plant Maintenance staff had erected a small, heated enclosure to protect the valves from the elements, but maintenance access remained very limited. Project design included a replacement valve enclosure with improved maintenance access to the effluent control valves.

Key Points

• Restored Filter Efficiency
• Upgraded Controls
• Cost Effective

Stormwater

In recent years stormwater management has evolved from providing simple drainage to minimizing the impacts of development on water quality and runoff volume.  Realization of the importance of wetlands has brought new opportunities for creative stormwater management solutions.  In many instances the scope of stormwater management issues creates the need to mobilize the efforts of several agencies to bring about the best solution.  New funding has been developed to finance the increased emphasis on efficient, environmentally sensitive stormwater management.

Services

NIES provides engineering consulting services to municipal and private clients. Typical projects include roadway design, utility design, drainage calculations, plant improvements, elevated tanks, lift stations and plan reviews for a number of local municipal governments. Typical services include surveying, design, drafting, bidding assistance, construction observation and pay request approvals.

Local Street Resurfacing - 2011 Various Streets Town of Dyer, IN

In 2011, NIES Engineering worked with the Town of Dyer, to assemble a prioritized list of roadways suitable for asphalt resurfacing and pavement markings.

The PASER (Pavement Surface Evaluation and Rating) Rating System of roadways, undertaken by NIES in 2011, was used as the framework to generate this list. A cost analysis of the roadways in most urgent need of asphalt resurfacing was performed and the list trimmed to meet the Town's available funding. The final design incorporated 23 roadways - just over three miles of roadway - in residential areas, and just over three miles of pavement traffic markings along Sheffield Avenue and 213th Street.

NIES Engineering addressed severely damaged portions of roadway using spot repairing techniques and replaced curb and gutter that were in need to provide positive drainage to existing storm sewers. All resurfaced roadways were milled and paved. New asphalt surface and fresh pavement markings of the various roadways gives the residents within the Town of Dyer a smother and more visually appealing roadway as they commute through their Town and improvements to roadway drainage should increase the useful life of these roadways, maximizing the benefit from the Town's investment.

Upon completion of the design, NIES assisted in the bidding and awarding of the contract; and closely working with the Town of Dyer, aided in the overseeing of the construction onsite. The residents of the Town of Dyer can now enjoy a much improved driving surface, effective drainage and reliable water main infrastructure.

Key Points

• Cost Effective
• Rehabilitation
• Extended Life