At high tides and during peak flows, however, pumping mechanisms are required to get the water into the Fraser River. In addition to smaller pumps in the interior of the island, Lulu Island is ringed with 28 pumpstations. The capacity of each pumpstation is determined by the number and size of the pumps it employs. Dredge building a dyke in the Steveston area, 1908. The existing outer dyke is built to an elevation of 3.9 m in East Richmond, and slowly decreases to 3.35 m in West Richmond.
Road is under review and study.
Outside of the floodplain exemption boundary is the designated floodplain of Richmond. Note that all of Richmond's ALR lies outside the floodplain exemption boundary and is thus at a higher risk of flooding than the urban areas of the city. Many of Richmond's farms could probably benefit from improved drainage infrastructure. Extensive maintenance is required in order to ensure that Richmond's drainage infrastructure is effective. For instance, ditches must be cleared of weeds and debris, and ditch retaining walls maintained or water may back up into the fields.