Wastewater Collection and Treatment

For more than 40 years, PEC has provided wastewater design services to both small and large communities. Specifically, our firm has worked in all wastewater project areas including wastewater treatment; gravity and force main hydraulic design; sewer rehabilitation; and, routing and ROW investigations, utility relocations, coordination with local utilities, impact on existing community and services, surveying and property plat preparation, master planning and cost effective analyses of proposed improvements, preparation of necessary permits for construction, and coordination with all key agencies (DOTD, DEQ, COE & RR’s).

PEC has on-staff professional engineers as well as engineering interns with excellent wastewater credentials in planning and design of pump stations, gravity and force main lines, ROW/utility relocations, force main hydraulics, and coordination with and experience in pressurized networks. The staff’s broad expertise will ensure optimization for the best design configuration and layout for any collection and treatment system.

PEC has completed a variety of reports and studies in the wastewater treatment and collection field. Many of these studies required extensive Environmental Assessment including Public Hearings to assess the community’s views of the proposed projects. PEC Wastewater Treatment Facility designs have ranged from simple non-mechanical oxidation ponds to advanced tertiary treatment mechanical plants. The design capacities ranged from 5 thousand gallons per day to as much as 130 million gallons per day. Construction of most of the plants has been completed; and, in all cases, the plants have been consistently meeting final effluent limits. In several communities throughout the State of Louisiana, PEC has stepped in and brought to completion sewer projects that had previously experienced years of delays and problems.

PEC has designed sewer rehabilitation programs for multiple Sanitary Sewer Collection Systems. The design of these projects consists of the review and analysis of main line Closed Circuit Television (CCTV) inspection tapes, main line and service line smoke testing reports, and manhole inspection reports. Once this information is reviewed, repairs such as main line removal and replacement (open cut excavation for replacement of pipes), installation of Cured-In-Place Liners (rehabilitation of pipe from manhole to manhole without excavation), sliplining, pipe bursting, manhole sealing, and miscellaneous service line repairs (such as sealing of open ended pipes, point repairs, etc.) are recommended. PEC has a track record in rehabilitation of the Sanitary Sewer Collection Systems for municipalities having successfully completed rehabilitation projects that are experiencing reductions of extraneous Infiltration and Inflow (I/I).

PEC is a public body infrastructure design specialist and is continuously in the process of preparing plans, specifications, construction documents and construction cost estimates for “public bid”.

The following is an overview of the firm's experience:

Sewer Rehabilitation – 4” to 36” line rehabilitation including removal and replacement, cured‐in‐place, pipe bursting, pressure grouting and manhole reh
abilitation. ump Stations (New and Upgraded)

Pump Stations (New and Upgraded) – 100 to 40,000 gpm apacities including grass roots andc
rehabilitated stations.

Collection Lines and Force Mains - Gravity Lines from 8” to 72” diameter, force mains from 3” to 42” diameter.

Treatment Plants (New and Upgraded) - 25,000 gpd to 30 mgd from trickling filter type facilities to extended aeration activated sludge systems with tertiary filtration.


Wastewater projects which PEC has been involved in may include construction administration, grant administration, etc.

Examples of projects for which PEC has completed feasibility and planning studies, preliminary and final design of wastewater treatment facilities and sewage collection and transportation facilities are as follows:

Expanded Project Descriptions

Project Experience Listing

  • City/Parish of East Baton Rouge: Sewer Pump Station Replacement (Pump Stations 11, 99, 158, 202, and 254) -1
  • City of Bogalusa: Upgrade and Expansion of Existing Wastewater Treatment Plant - 2
  • Pointe Coupee Parish Police Jury: Detention Center Influent Pump Station Rehabilitation -1
  • West Baton Rouge Parish: Reverend Manuel Road and Freeman Lane New Wastewater Treatment Facility and New Wastewater Collection System -1,2
  • Port Allen: New Belt Filter Press -1
  • New Wastewater Treatment Facility for Love’s Travel Stops & Country Stores
  • Tangipahoa Parish: FY2005 LCDBG Acadian Hardwoods -1,4
  • Pointe Coupee Parish Police Jury: FY2003 LCDBG Mandela Lane Sewer Improvements (New Wastewater Treatment & Collection System) -1,2
  • St. Mary Parish Cypress Street Pump Station Emergency Repair -1
  • St. Martin Parish Water & Sewer Commission No. 1: Stephensville Wastweater Treatment Plant Improvements - 2
  • Town of Springfield: New Wastewater Treatment and Collection System - 1,2
  • West Baton Rouge Parish: Erwinville Wastewater Collection & Treatment Facilities - 1,2,3,4
  • City of St. Gabriel: Sewer Collection Improvements (Phases 1 through 4) - 1,2
  • Town of Madisonville:  Wastewater Treatment Plant Improvements - 2
  • Livingston Parish Council:  FY2002 LCDBG Improvements to the Haynes Settlement Wastewater Treatment Facility - 1,2
  • City of New Roads:  Wastewater Treatment Facilities Rehabilitation and Upgrade - 2
  • St. Martin Parish:  Renovations and Expansions to Water and Wastewater Facilities at Parish Industrial Park- 1,2
  • Pointe Coupee Parish Police Jury:  FY1999 LCDBG Legonier Wastewater Treatment Plant & Collection System -1,2,3
  • Town of Maringouin:  Improvements to the Wastewater Collection & Treatment Facilities -1,2
  • City of Covington:  Improvements to Wastewater Treatment Facilities -1,2,4
  • Town of Pearl River:  Municipal Sewerage System -1,2
  • City/Parish of East Baton Rouge:  South Consolidated Wastewater Treatment- Plant Expansion, Phase II- 1/2