development agreement was expressly designed by the city to be both enforceable and to extent tend a costa hawkins challenge. on the question of historic preservation, while opinions on park merced architectural experience vary widely, it has never been established as a historical site. park merced was built quickly and inexpensively by metropolitan life in several cities after world war ii using a cookie cutter form. san francisco's well known architectural heritage abuses the conversation about the values of historic preservation and why it is important. on the question of environment, of which this is a central feature, we should note that the old park merced was con seeved -- conceived and built at odds with those in the cities today. they have low-dense land-use values that no longer make sense. the new design makes far better use of the city's scarce land. the old development is built on heavy use of hedge-heavy drinking water whrks we are talking about preserving the green spaces there, we are talking about landscape that requires tuolomi river water. this is not sustainable. tho the old ne