Dam Construction

I have a couple questions to ensure that I am analyzing my scenarios correctly. I have used IMPLAN before, but it has been a number of years and, unfortunately the staff member that took your training course has recently left the company. I am evaluating the impacts of constructing a dam and pipeline in a rural area. I included all counties that were adjacent to the project site for the scenarios. My task is limited to estimating the regional impacts of construction (5 years) and operation and maintenance (50 years). I received a roll-up of the costs that included a few major categories (it did not break the costs down by labor and materials). For the construction activities I assigned the following sectors to each major category (total cost divided by 5 years for yearly average during the construction period): Construction of dam and pipeline – Activity: Industry Change, Sector: 33. Water, sewage and other treatment and delivery systems Purchase of lands – Activity: Industry Change, Sector: 426 Private Household Operations (assumes 10% of the cost for land purchases is kept in the local economy, the rest is saved or leaked out) Conflict/Mitigation – Activity: Industry Change, Sector: 40. Maintenance and repair construction of residential structures (covers relocating houses and cemeteries and modifying bridged and roads) For the annual operation and maintenance activities I assigned the following sectors to each major category: Operation and Maintenance – Activity: Industry Change, Sector: 33. Water, sewage and other treatment and delivery systems Electricity – not included because power is purchased from a much larger grid Am I assigning the appropriate Activity and Sector codes to each of these activities? Any guidance/thoughts would be appreciated.