RJN is a national leader in municipal infrastructure infiltration/inflow reduction programs and associated rehabilitation of sanitary sewers. Our services cover the full spectrum of evaluation, planning, design, and construction engineering. Design and construction administration services have been provided for sanitary sewers ranging in size from 8 inches to 144 inches in diameter.

• Wastewater Collection  More >>

• Typical Sanitary Sewer Projects   More >>

• Hydraulic Modeling   More >>

• Master Planning   More >>

• Wastewater Treatment   More >>

• New Sanitary Sewer Systems   More >>

• Construction Administration Programs   More >>

• Infrastructure Management   More >>

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Wastewater Collection

• CMOM compliance
• SSO reduction programs
• Sewer system evaluation surveys
• Combination sewer studies
• I/I removal programs
• Rehabilitation design
• Pump station design
• Inventory and condition assessment

Typical Sanitary Sewer Projects

• Interceptor sewers
• Gravity sewers
• Pressurized systems
• Vacuum systems
• River and stream crossings
• Pump stations
• Lift stations
• Linings
• Pipe bursting
• Directional drilling

Hydraulic Modeling

When RJN Group provides hydraulic modeling services, "what if" scenarios are developed to maximize the benefit to clients by enabling the comparison of costs for different alternatives. Modeling services include linking collection system databases and models with many GIS packages.

Using our methodology, relationships between rainfall intensity and inflow are developed and incorporated into our Computer Analysis of Sanitary Sewer (CASS) model. CASS simulates the flow of individual infiltration/inflow sources through a collection system's network, and allows the prediction of flow through any individual pipe in the network for whatever frequency rainstorm event is desired.

• Extensive in-house computer capabilities
• USEPA, SWMM, XP SWMM, MIKE SWMM, CEDRA, HydroWorks, HYDRA, AND SWMM EXTRAN

Master Planning

• Mapping
• Linking to GIS
• Rate studies

Wastewater Treatment

• Facilities planning
• Process optimization
• Rate studies
• Wet weather treatment facilities
• Operator training/start-up processes
• Primary, secondary, and advanced treatment

New Sanitary Sewer Systems

• Provide sewerage to previously unsewered areas
• Increase system capacity
• Re-routing flow to underutilized portions

Construction Administration Programs

• Construction engineering
• Design and construction of large diameter interceptor sewers
• Construction of new sanitary sewer systems
• Replace antiquated, undersized, or deteriorated existing lines
• Relocate lines in anticipation or advance of proposed improvements
• Construct administration/bidding
• Plans and specifications

Infrastructure Management

• CASS WORKS® Maintenance Management Software
• Forecasting, planning and scheduling
• Mobile work order processing
• GIS integration