In her recent story about the ground breaking for the Seabrook drinking water plant, NHPR's Amy Quinton made an important point. She noted that of 56 drinking water projects in the state, only about 25% of them are under contract, that is, in the hands of contractors who will then do the work. This gives a sense of when one can expect jobs to appear based on these bricks and mortar projects.
When looking at the impact of the stimulus, the general forecast is that direct job creation will peak in the spring of 2010.