In the last 25 years, following the completion of the Willow Creek ‘all’ RCC dam, the experience and knowledge gained through the completion of over 350 RCC dams has been considerable. Many new ideas and innovations have been tested and adopted so that today 300m high RCC dams are almost a ‘reality’ with Pakistan soon to embark on the construction of a 272m high RCC dam on the Indus River. The paper looks in detail at what the author considers to be two of the most important developments in the history of RCC. One being solving the issue of bonding by placing the RCC lifts within the initail set time of the RCC the other, achieving a durable, impervious and aesthetic facing to the RCC by altering in-situ the proportions of the RCC with the addition of grout to the uncompacted, as spread RCC so it will behave as conventional concrete when internally vibrated.