曹公潭山坡工程

no matter for either public works or private development, there shall be a project notice board stating the brief content of the project. You could go to there and have a look.

Althernatively, all public slope works are carried out by CEDD. You could check in website http://www.cedd.gov.hk/tc/projects/landslip/lpm_activesite_chi.pdf

If you couldn't find it, it is highly probably to be a private development / slope maintenance. You could check it in BD website http://www.bd.gov.hk/english/services/index_bravo.html

If it is an existing slope, you could also check in LandsD website http://www.slope.landsd.gov.hk/smris/