Engineering Updates – May 1, 2020

PROJECTS UNDER CONSTRUCTION

Main Channel Rehabilitation

The District is rehabilitating the south bank of Main Channel at its confluence with Jones Creek.  During Harvey a portion of this bank eroded causing cavities behind some of the existing slope paving.  Repairs included rebuilding the slope, installation of an erosion control mat, and grout filing behind the void under the existing slope paving.  The District has obtained approval from FEMA for this project.

Construction is complete with inspections to be held in early May.

Jones Creek Slope Rehabilitation

Construction has commenced on the Jones Creek Slope Rehabilitation project, which consists of installation of gabion basket erosion protection system along the west side of Pecan Lakes, adjacent to Jones Creek.  Project is expected be under construction through Summer 2020.

Segment B, location near the pump station, is complete, with only minor items remaining as part of close out of the entire project.

On Segment A, the area immediately behind the residences, the Contractor has continued to work on installation of gabion baskets.  The Contractor is approximately 75% complete with bottom layer, about 25% complete with the second layer and has started on the third layer.

The Contractor is allowed to work from 7 a.m. until sunset for seven days a week. At this time, the Contractor does expect to work seven days a week in order to achieve the project delivery schedule.

Residents are reminded that this is an active heavy construction site.  DO NOT enter construction site at any time.  There has been unauthorized access to the construction area which places the unauthorized visitor and construction crews at risk.

Levee Drainage Improvements adjacent to Harvest Green

This project, which cleared out the trees and vegetation that prevents adequate drainage on the toe of the levee adjacent to the Harvest Green development, is complete pending final grass growth.

Improvements to Raw Water Tanks at Surface Water Treatment Plant

The District will install a floating mixer in each of the raw water storage tanks at the Surface Water Treatment Plant located off Skinner Road.  The mixers will create constant movement in the raw water to limit sediment from settling to the bottom of the tank. In addition, stairs and walkways will be installed as part of this project to improve operator access to the tanks.

Project is under construction.  Raw water sediment mixers are operational and working very efficiently.  Contractor is assembling stairs and walkway on site for installation in early May.

Mason Road Levee Improvements

The District is working on raising the levee along Mason Road from the intersection of FM 359, north along Mason Road, then east along Oyster Creek to Farmers Road.   Plans include adding up to an additional one (1) foot of height to the levee between Pecan Grove Plantation Country Club and Farmer Road where it crosses Oyster Creek.  Project will include adjustments to the existing parking lot at Belin Park which will include new paving in

Construction is underway. Contractor is approximately 75% complete with construction. Construction is expected to last into June 2020.

Residents are reminded that this is an active heavy construction site.  DO NOT enter construction site at any time.

South Pump Station Automation

The District is updating the electrical system to allow for the pumps at the south pump station to automatically turn on or off based on the water level in the main channel.

Notice to Proceed has been issued and construction has commenced with installation of conduit sleeves for electrical improvements.

South Pump Station Access Road Improvements

The District is improving the access road to the south pump station to install a concrete driveway.

Project is complete pending final inspections.

Residents are reminded that this is an active heavy construction site.  DO NOT enter construction site at any time.

Rehabilitation of Lift Station 7

The District is rehabilitating and updating the electrical controls at Lift Station No. 7. The pumps, concrete wet well, valves, electrical components and other appurtenances have reached the design life.

Construction has commenced on the project.  The Contractor has expedited construction activities.  Lift station is expected to undergo start up testing the first week of May 2020.

Electrical Improvements and Generator at Water Plant No. 2

The District is updating the electrical system including installation of a new generator at water plant no. 2 (located near the elevated storage tank).

Notice to Proceed has been issued.  Contractor is ordering the necessary components and construction is expected to begin in Summer 2020.

Improvements at Water Plant No. 3

The District is modifying the pumps and piping system at water plant no. 3 (located at the end of Willow Bend Dr.).

Notice to Proceed has been issued.  Contractor is ordering the necessary components and construction is expected to begin in Summer 2020.

 

PROJECTS UNDER DESIGN

North Pump Station Improvements

The District is improving the access to the north pump station by adjusting the headwall and grading modifications.  Project also includes automation of the pumps based on level of water in Bullhead Slough.

District received bids on the project and awarded the project to Rally Construction, Inc. Notice to Proceed is expected to be issued in June 2020.

Bullhead Slough Rehabilitation

The District is dredging silt out of Bullhead Slough and rehabilitating the side slopes which have eroded over time.  Project includes installing ShoreSox product at the water’s edge to stabilize and prevent future erosion.  Project includes eastern and middle sections of Bullhead.  Western section of Bullhead will be performed in the future.

District received bids and awarded the contract to Storm Water Solutions.  Notice to Proceed is expected to be issued in June 2020.