OT_217: Environment Southland effluent-pond code (2009), lined pond excavation up to $5/m³

OT_217: Environment Southland effluent-pond code (2009), lined pond excavation up to $5/m³

Source

https://www.es.govt.nz/repository/libraries/id:26gi9ayo517q9stt81sd/hierarchy/about-us/plans-and-strategies/regional-plans/regional-water-plan/documents/additional-documents/code-of-practice-for-design-and-construction-of-agricultural-effluent-ponds.pdf — original source (opens in a new tab; the file is not redistributed)

Context: ni · Feeds D03 + D02 (lined-pond CapEx + depth)

Summary

Environment Southland’s effluent-pond code, used here as a NZ cost and design proxy for a lined water-storage pond. It gives the lined-pond excavation cost per cubic metre (the liner sits on top) and confirms the 3-4 m depth typical of such ponds, which validates the model’s dam-depth assumption.

Key claims

- claim: "LINED POND EXCAVATION COST + DEPTH. Excavating a lined earth pond (clay or synthetic liner) costs up to $5.00 per m³ of pond volume, excavation only, with liner and system extra. Anaerobic/effluent ponds are built 3-4 m deep (minimum 3 m, up to 4 m for larger herds; deeper than 4 m is avoided for desludging). [verified against the raw: '5.00 per' m³ confirmed]"
  source_location: "Environment Southland Code of Practice, Agricultural Effluent Ponds (2009), excavation cost + pond-depth design sections."

Model use

• The lined-pond value for irrigation_dam_capex_nzd_per_m3 in D03: excavation ~5/m³ + liner gives roughly **5-8/m³ all-in**. This is what the model’s assumed 5/m³ actually represents (a lined pond), distinct from the ~2.5/m³ earth dam (OT_216). Confirms irrigation_dam_depth_m = 3.0 m is reasonable (real ponds run 3-4 m). OT_217

Notes

• Caveat. 2009 excavation rate (refs a 2006 dairy manual); the all-in lined-pond $/m³ is a bracketed derivation (excavation + liner), not one disclosed figure.
• Provenance. Environment Southland code of practice PDF, authoritative first-party, figure verified against the raw.

Connections

Links to

EDT domains (2): D02: Smart Food Systems & Agriculture · D03: Water, Waste & Circular Systems

Sources (1): OT_216

Referenced by

EDT domains (1): D03: Water, Waste & Circular Systems

Sources (1): OT_216