Many IDBs work together to reduce costs to the taxpayer by forming Consortia.

LMDB is the Lead Board in the Water Management Consortium which comprises the Isle of Axholme and North Nottinghamshire Water Level Management Board and the Trent Valley Internal Drainage Board. Consortium working brings benefits to ratepayers by effectively reducing the costs of administration and engineering services and enabling an enhanced in-house professional service across all member boards. Operationally the Consortium provides resilience to member boards particularly key in times of flooding by making labour and equipment readily available.