LDC’s fifth large gully repair will benefit two properties
LDC’s fifth large-scale gully remediation site is at Havilah Station. Works are expected to start in July.
The Havilah gully site has been selected as a priority project, based on the work completed by the Griffith University project team as part of the LDC project to characterise and prioritise gully remediation across the BBB catchment.
The works consist of two main gully systems within the gully site and bounded by a proposed fenced area about 1800m long (west-east) and 650m wide (north-south). A proposed 5000m fence boundary will enclose 110ha of the revegetation plan.
The majority of the site is located on Havilah Station, with a portion to the east on Gattonvale Station. This partnership between the two properties will mean the effort on one property to halt the gully expansion will be of benefit to both.
The first gully is elongated and the proposed works include two grade control rock chutes, one about one third along the gully and a second about two thirds along the gully.
An overland flow bund will be constructed to assist with directing water flows to the upper chute. The lower chute will hold the water to encourage sediment deposition.
Reshaping works are proposed at the head of the gully to assist with overland flow and revegetation.
Proposed works on the second gully include a 4m wide rock chute to remediate the gully head cut and to prevent further propagation towards the road. Two bunds either side of the chute will assist with directing road runoff to the design grade control rock chute.
The lower part of the gully will be remediated to remove tunnelling to scalded lower sections of gullies. Gully reshaping works will be completed in the head cuts adjacent to the chute.
The technical designs have been prepared by engineering firms Alluvium and Veterra, and Veterra will project-manage the works. Local contractors will carry out the work.
Onsite inspections of the proposed works have been conducted and final agreements with the landholders completed.
NQ Dry Tropics is working through the final approvals required by the State Assessment and Referral Agency to meet the required State Development Assessment Provision State Codes.
Construction is expected to start in July 2021.
Progress photos, and before and after works photos will be shared with the BBB community in the Summer edition of The Grit at the end of this year.
First large-scale gully was at Mt Wickham
Alluvium and Veterra partnered with LDC to rehabilitate the project’s first large-scale gully remediation site at Mt Wickham Station.
Read about it, and check out the progress photos in the LDC’s Landscape Remediation Halfway Update
They also worked with LDC to rehabilitate a large-scale gully on Strathmore Station. You can read about those works in this story.