A system for supplying liquid fuel mixtures to a gas turbine engine comprising: a plurality of interconnected mixing assemblies, wherein each of the plurality of interconnected mixing assemblies is configured to mix a first fuel and water to generate a first mixture, and mix a second fuel and the water to generate a second mixture, the first and second mixtures (80,94) are configured to combust in each of a plurality of combustors of a gas turbine, and each of the plurality of interconnected mixing assemblies comprises: a first fuel passage disposed in an integrated housing, wherein the first fuel passage is configured to flow the first fuel; a second fuel passage disposed in the integrated housing, wherein the second fuel passage is configured to flow the second fuel; a water passage disposed in the integrated housing, wherein the water passage is configured to flow the water; a first mixer disposed in the integrated housing and coupled to the first fuel passage and the water passage, wherein the first mixer is configured to mix the first fuel and the water to form the first mixture; and a second mixer disposed in the integrated housing and coupled to the second fuel passage and the water passage, wherein the second mixer is configured to mix the second fuel and the water to form the second mixture; a first fuel valve coupled to the integrated housing, wherein the first fuel valve is configured to adjust a flow rate of the first fuel and has a first fuel flow coefficient between approximately 1.0 to 1.5; a second fuel valve coupled to the integrated housing, wherein the second fuel valve is configured to adjust a flow rate of the second fuel and has a second fuel flow coefficient between approximately 3.0 to 5.0; a first water valve coupled to the integrated housing, wherein the first water valve is configured to adjust a flow rate of the water mixed with the first fuel and has a first water flow coefficient between approximately 0.4 to 0.55; and a second water valve coupled to the integrated housing, wherein the second water valve is configured to adjust a flow rate of the water mixed with the second fuel and has a second water flow coefficient between approximately 3.5 to 5.0; wherein the integrated housing is configured with the first fuel valve, the second fuel valve, the first water valve, and the second water valve proximate to one another. a first fuel passage disposed in an integrated housing, wherein the first fuel passage is configured to flow the first fuel; a second fuel passage disposed in the integrated housing, wherein the second fuel passage is configured to flow the second fuel; a water passage disposed in the integrated housing, wherein the water passage is configured to flow the water; a first mixer disposed in the integrated housing and coupled to the first fuel passage and the water passage, wherein the first mixer is configured to mix the first fuel and the water to form the first mixture; and a second mixer disposed in the integrated housing and coupled to the second fuel passage and the water passage, wherein the second mixer is configured to mix the second fuel and the water to form the second mixture; a first fuel valve coupled to the integrated housing, wherein the first fuel valve is configured to adjust a flow rate of the first fuel and has a first fuel flow coefficient between approximately 1.0 to 1.5; a second fuel valve coupled to the integrated housing, wherein the second fuel valve is configured to adjust a flow rate of the second fuel and has a second fuel flow coefficient between approximately 3.0 to 5.0; a first water valve coupled to the integrated housing, wherein the first water valve is configured to adjust a flow rate of the water mixed with the first fuel and has a first water flow coefficient between approximately 0.4 to 0.55; and a second water valve coupled to the integrated housing, wherein the second water valve is configured to adjust a flow rate of the water mixed with the second fuel and has a second water flow coefficient between approximately 3.5 to 5.0; wherein the integrated housing is configured with the first fuel valve, the second fuel valve, the first water valve, and the second water valve proximate to one another.