Primary Clarifier No. 1 Rehabilitation

PROJECT

Primary Clarifier No. 1 Rehabilitation

ENGINEER

Garver

CONTRACTOR

McInnis Brothers Construction, Inc. (Minden, LA)

CONSTRUCTION COST

Original Contract Price:  $232,000.00

Change Order No. 1:  $19,993  The material of the clarifier mechanism is upgraded to stainless steel to take advantage of low steel prices.  The stainless steel provides a longer useful life than conventional painted steel.

Change Order No. 2:  $5,877.00  The floor of the effluent channel was added to the surfaces to be repaired.

Final Construction Cost - $257,870.00

FUNDING SOURCE

Utility Fund

PROJECT LOCATION

The Primary Clarifier is located at our Wastewater Treatment Plant at 2701 Angeline St.

PROJECT SCHEDULE

Notice to Proceed:  November 2, 2015
Substantial Completion:  May 26, 2016
Final Completion:  June 21, 2016
 

 

PROJECT DESCRIPTION

The Work under this contract consists of the rehabilitation of a 55 foot diameter concrete primary clarifier. The rehabilitation consists of removal and disposal of existing clarifier grout and mechanical and electrical equipment, cleaning, preparing and repairing concrete surfaces, and installation of new clarifier equipment and associated equipment and appurtenances.

JUSTIFICATION

The primary clarifier mechanism failed in the Summer of 2015.  This project was designed and bid under a compressed time schedule. The original structure was built in the 1950's.  The clarifier was rehabilitated with a new mechanism and baffles during the plant expansion in the 1980's.  The mechanism failed due to age and physical wear.  This treatment unit is one of two primary clarifiers and helps to remove solids from our wastewater before undergoing additional treatment.

PROJECT STATUS - COMPLETE

 

The primary clarifier was placed back in service June 21, 2016.

WORK IN PROGRESS PHOTOS

FINAL PHOTOS