Interagency Hydrology Committee for Alaska (IHCA)

Date Last Modified

November 12, 2020
The Water Cycle
Current News

    Next IHCA meeting: 

    November 5-6, 2020 - Virtual, MS Teams


    Recent meeting notes


ChairPaul Burger, National Park Service (NPS)

Vice-chairAngela Bolton, Anchorage Water and Wastewater Utility (AWWU)

SecretaryTerri Lomax, Alaska Department of Environmental Conservation (ADEC)

Past ChairCharley Palmer, Alaska Department of Environmental Conservation (ADEC)

About Us

The Interagency Hydrology Committee for Alaska (IHCA) is an organization of technical specialists working at the Federal, State, and local levels, who coordinate the collection and implementation of water resources related data throughout the State of Alaska. The IHCA meets twice per year to coordinate multi-agency issues and exchange of information. 


Coordinated efforts to address hydrological and climatological issues in Alaska dates back to the early 1960's when a "Technical Committee" was established under the auspices of the Subcommittee on Hydrology, Interagency Committee on Water Resources (ICWR). The parent committee became the Hydrology Committee of the United States Water Resources Council (WRC).

In 1977 members of the Interagency Technical Committee for Alaska developed an Organization, Objectives, and Operation statement in response to a growing need to improve coordination among agencies for hydrologic and climatologic data. In November, 1977 the Committee approved this document and adopted the name "Interagency Hydrology Committee for Alaska" (IHCA). The IHCA continued to operate under the sponsorship of, and receive guidance from, and report to the WRC Hydrology Committee.

Additionally, the IHCA has acted as the technical advisory committee of the past Governor's Alaska Water Management Council.

Recent Water Resources Highlights

NEW  Eklutna Hydroelectric Project, Fish and Wildlife Program Development

Alaska Interagency Water Rights Course No. 1730-26 : October 24-28, 2016 - Campbell Creek Science Center - Anchorage, Alaska -- Course Summary Background with Portal Link to Access All Course Materials (updated 9/25/2018)

Alaska NHDPlus Alpha, download data (posted 11/1/2017)

Alaska Hydrography Database (AK Hydro) (posted 10/1/2017)

NOAA Water Initiative (posted 12/1/2016)

Upcoming Meetings

NEW  American Water Resource Association postponed

NEW  Surveying and Mapping Conference - April 6-8, 2020, Dena'ina Center, Anchorage, AK

NEW  Alaska Water Wastewater Management Association Annual Conference - May 4-7, 2020, Captain Cook Hotel, Anchorage, AK