Answer
You should ensure that any amounts owed to BIA on the date of your petition for bankruptcy are reflected on your schedules and statement of financial affairs. If you did not include your BIA debt, you should amend those documents to reflect the debt owed to BIA, and ensure BIA is treated equitably under your plan. You should provide notice of the bankruptcy to your local irrigation office.
If the irrigation bill was issued after the date of your bankruptcy petition you should pay the bill, it is not impacted by your bankruptcy filing.