Colorado’s legislative redistricting commissions on Tuesday released what could be adopted as the group’s final state House and Senate maps, if the commission cannot support an alternative.

The maps released Tuesday are the “third staff plan” draft maps, and they are the final set of maps in a series of possible map plans produced by the commission’s staff, based on input from the commissioners and the public.

The new independent redistricting system in Colorado requires the staff plans, then allows the 12 commissioners — four Republicans, four Democrats and four party-unaffiliated voters — to begin debating and voting to adopt a final set of maps, from any number of possible map plans, including the third staff plan.

If the commission can support maps with a supermajority of eight commissioners, including two of the party-unaffiliated commissioners, then they will be adopted as the final maps to submit to the Colorado Supreme Court for review and approval. If the commissioners cannot rally the required number of votes, then the “third staff draft” maps released Tuesday will become the adopted final maps.

The new map plan proposal would not dramatically shift the composition of the state legislature. 

The “third staff draft” maps would create a Senate with 19 Democratic seats, 12 Republican seats and four districts where an average of recent statewide elections would have been within 5 percentage points. The current makeup of the state Senate is 20 Democrats and 15 Republicans.

It would create a House with 40 Democratic seats, 23 Republican seats, and two districts where an average of recent statewide elections would have been within 5 percentage points. The current makeup of the state House is 41 Democrats and 24 Republicans.