More than four years after launching its opportunity zones program to attract investment to economically underdeveloped areas, Colorado is winding it down — and declaring it one of the bigger successes among similar programs throughout the United States. While exact figures are scarce due to a lack of reporting requirements surrounding the federal tax credit, Colorado officials believe that roughly $1 billion has been invested in opportunity zone projects here, and a similar amount has been raised from state investors. Colorado generated the third-largest per-capita investment level among states and the funding reached areas from remote Western Slope town Naturita to rarely developed southeastern towns like Granada, according to the Colorado Office of Economic Development and International Trade. Some three-quarters of the money from opportunity zone investments has gone to multifamily housing projects. Critics of the program worried that developers would take advantage of the tax breaks to build luxury residences on the edge of some opportunity zones, and the majority of apartment projects in Colorado — 21, including all of those in the Denver area — are at market rate. But 15 workforce-priced apartment projects sprawled in more rural areas of the state, producing more than 1,000 units […]