A description of the old plant of the Fort Collins water supplyworks will not, in all probability, be a matter of interest further than the general statement that it consisted of a series of negative head mechanical filters with a clear water basin beneath them, an adjoining coagulating basin, a small basin in which coagulants are applied, and a basin of a capacity of about two million gallons, primarily designed for storage purposes to tide over intervals of high river turbidity. The water from both the old and the new plant flows by gravity to distant distributing reservoirs, thence into the distributing system of the city under sufficient pressure for general service. The new water purification plant adjoins the old one and is so designed as to utilize as far as possible the old plant. The new plant consists of six mechanical filters in sets of three on each side of a pipe gallery, all under cover of a fireproof building. The head works from which a water supply is taken remains as originally designed and constructed. . A 36-inch creosoted wood stave pipe was constructed to connect the head works with the storage reservoir. This pipe line supersedes a 20-inch line originally constructed to convey water from the head works to the old filter plant. The storage reservoir, now settling basins, was completely remodeled. This basin is about 300 feet long and 100 feet wide. A reinforced concrete division wall was constructed across the basin dividing it into two basins, the smaller of which is of a capacity about one-quarter the total capacity of the basin. The bottom of the small basin was excavated hopper-shaped, floored with concrete and supplied with an independent drain pipe to the river. The small basin receives the raw water and is intended to afford a short period of sedimentation for the heavy sandy sediment carried by the river in freshets. A chemical house was constructed at the south end of the