Generally revise ground water laws
HB 704 would make broad changes to Montana groundwater law, with a particular focus on areas where groundwater development is already heavy or where aquifers are being monitored for depletion. The bill creates a set of temporary legislative controlled groundwater closure areas for the Gallatin, Helena, Bitterroot, and Missoula Valley aquifers while a groundwater study is pending. In those areas, new groundwater appropriations would generally require a permit, with narrow exceptions for limited domestic use, stockwater, and certain subdivision-related parcels meeting detailed date, flow, and volume limits. The bill also establishes legislative controlled groundwater monitoring areas for the Flathead Valley deep and shallow aquifers and the Billings terrace level 3 aquifer, with mandatory metering and annual reporting for new rights in those areas.
The bill also revises existing permitting exceptions outside controlled areas. It expands and clarifies when permits are not required for certain wells, springs, geothermal uses, fire-related uses, livestock impoundments, and some subdivision parcels, while adding or tightening metering, reporting, notice, and cumulative-volume requirements. It amends the statutory framework for controlled groundwater areas by adding new categories for water quantity monitoring and by setting criteria for when the Department of Natural Resources and Conservation may designate, modify, or remove controlled areas based on aquifer decline, appropriation levels, or surface-water impacts. The bill includes rulemaking authority for the department and would take effect immediately upon passage, but the new temporary closure provisions would terminate on January 1, 2032.
The overall sentiment reflected in the vote history appears mixed to negative. The bill cleared the House Judiciary Committee by a narrow 11-9 vote, suggesting some support for stronger groundwater management, but it then failed on second reading in the House by a wider 44-54 margin. That pattern indicates the bill had enough support to advance in committee but not enough to secure floor passage.
The main points of contention appear to be the bill’s restrictions on exempt groundwater development and its treatment of subdivision and domestic-use exceptions. Supporters likely viewed the measure as a response to groundwater depletion, the need for better monitoring, and protection of senior water rights under the prior appropriation doctrine. Opponents likely objected to the added permitting burdens, metering and reporting requirements, and the creation of temporary closure areas that could limit development in fast-growing valleys. The detailed carve-outs for existing tracts, subdivision approvals, and low-volume uses suggest the bill tried to balance water protection with property-development concerns, but the floor vote shows that balance was not broadly accepted.
HB 704 would amend multiple sections of the Montana Water Use Act and related groundwater statutes, especially 85-2-113, 85-2-306, 85-2-381, 85-2-506, and 85-2-524, MCA. It would create new temporary closure and monitoring regimes for specified aquifers, require metering and annual reporting for many new groundwater uses in designated areas, and expand the Department of Natural Resources and Conservation’s rulemaking and enforcement authority over controlled groundwater areas. It would also alter the scope of permit exceptions for wells, springs, geothermal systems, stockwater, fire protection, and subdivision-related appropriations, affecting landowners, developers, well drillers, local governments, and existing water-right holders in the named basins and aquifers.
The bill’s sentiment was cautious and divided. The committee vote suggests some legislators supported the bill as a groundwater conservation and management measure, but the failed second-reading vote shows that the proposal did not command majority support on the House floor. The absence of recorded committee testimony in the provided context limits direct insight into arguments, but the voting pattern indicates significant concern about the bill’s reach and practical effects.
The most likely areas of contention were the temporary closure of groundwater development in the Gallatin, Helena, Bitterroot, and Missoula Valleys; the new metering and reporting requirements; and the limits placed on permit exceptions for domestic wells and subdivision parcels. Supporters would have emphasized aquifer decline, protection of senior water rights, and the need for better data and oversight. Opponents likely focused on impacts to housing development, rural landowners, and the administrative burden of permitting and metering, especially where the bill imposes cumulative volume caps and restricts changes in water use. The bill’s detailed grandfathering provisions for certain preexisting subdivision approvals suggest lawmakers were trying to address fairness concerns, but those carve-outs may also have been a source of debate over who should be exempt and on what terms.