This record summarises data from annual monitoring of sediments and intertidal biota in Waimea Estuary. Temporal coverage: from 1996 (ongoing) Number of Sites: 4 Sampling frequency = Annual Main marine environment sampled: Estuarine Depth zone: Intertidal Sediment type: Soft Community association: Mudflats Sampling Method: Cores and quadrats, field observations Parameters Collected: Infauna and Epibiota communities, sediment chemistry and grain size Measured variables: Community composition, Amphibola numbers, particle grain size, ammonia, formaldehyde Species/community data: Benthic Invertebrates (? 0.5 mm) Other data collected: unknown This collection is ongoing as part of resource consent requirements. Quality assurance: unknown