Engineering Updates – April 6, 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 will include rebuilding the slope, installation of an erosion control mat, and grout filling behind the void under the existing slope paving.  The District has obtained approval from FEMA for this project.

Construction has commenced and expected to be substantially complete in April 2020.

Jones Creek Slope Rehabilitation

Construction continues 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 District received a 60-day contract extension from the NRCS to meet federal grant requirements.  Project is expected to substantially complete in early June 2020.

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

Construction continues on improvements to the drainage of the outside toe of the levee adjacent to the Harvest Green development.  This project will clear out the trees and vegetation that prevents adequate drainage on the toe of the levee.

Project is complete.

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.

Notice to proceed has been issued and materials have been ordered by Contractor.  Construction at the plant did commence in February and is expected to be complete in April 2020.

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 has completed material placement on section between golf course and Belin park and is preparing for installation of asphalt road.  Contractor is working on material placement from Belin Park to Farmers Road.  Construction is expected to be substantially complete in May 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 is expected to commence in May 2020.

South Pump Station Access Road Improvements

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

Notice to Proceed was issued and Contractor has mobilized to begin construction operations.

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 and expected to be completed in late May 2020.  The District understands that the construction activity is loud and is working with the Contractor on ways to reduce the noise level of construction.

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.