Founded in 1972, the Groundwater Appropriators of the South Platte River Basin, Inc. (GASP) was a non-profit well-augmentation company that offset depletions to the South Platte River caused by pumping of the South Platte valley-fill aquifer. At its peak, GASP served more than 3,000 wells in northeastern Colorado. State regulations changed, requiring the company to cease operations in 2003. Collection materials include operation plans, membership lists, well information, legal documents, marketing materials, correspondence, dissolution documents, meeting minutes and agendas, as well as oversize maps and drawings. For more information see the finding aid.

This digital collection, with materials dated 1933 to 2007, include GASP’s operational records such as operating plans, meeting minutes, legal files, and correspondence, as well as publications related to groundwater use.

Recent Submissions

  • Well contracts 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:1976-1978
    Format:data (information); documents (object genre)
    Individual water contract cards for GASP members.
  • Riverside Reservoir water owned 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:1979-2001
    Format:documents (object genre)
    Documents and maps related to GASP's shares in the Riverside Reservoir Company.
  • Pioneer water owned 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:1989-2005
    Format:documents (object genre)
    Documents related to GASP's shares in Pioneer Water and Irrigation, Inc., including the company's bylaws.
  • New Cache La Poudre ditch owned 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:2001
    Format:documents (object genre)
    Documents related to GASP's shares in the New Cach la Poudre Irrigating Company.
  • Morgan-Prewitt water owned 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:1978-2006
    Format:documents (object genre)
    Documents and maps related to GASP's shares in the Morgan-Prewitt Reservoir Company.
  • Lake Loveland water owned 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:1986-2000
    Format:documents (object genre)
    Documents related to GASP's shares in Lake Loveland (the Loveland and Greeley Reservoir).
  • Greeley-Loveland water owned 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:1999-2000
    Format:documents (object genre)
    Documents and maps related to GASP's shares in the Greeley and Loveland Irrigation Company.
  • Greeley #3 water owned 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:2001
    Format:documents (object genre)
    Documents related to GASP's shares in the Greeley Irrigation Company's Greeley #3 Ditch purchased from Westmoor Resources and others.
  • Greeley #3 water, Marty Birdand Lawrence Herzke, Westmoor Resources 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:1991-2000
    Format:documents (object genre)
    Documents related to GASP's shares in the Greeley Irrigation Company's Greeley #3 Ditch transferred from Westmoor Resources and purchased from Rick Hertzke.
  • 16 shares Greeley #3 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:2000-2001
    Format:documents (object genre)
    Documents related to GASP's 16 shares in the Greeley Irrigation Company's Greeley #3 Ditch purchased from Westmoor Resources.
  • 3 1/4 shares Greeley #3 Brazelton Realty 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:1995-2005
    Format:documents (object genre)
    Documents related to GASP's shares in the Greeley Irrigation Company's Greeley #3 Ditch purchased through Brazelton Realty.
  • Cache La Poudre Reservoir owned 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:2001
    Format:documents (object genre)
    Documents related to GASP's shares in the Cache la Poudre Irrigating System and Cache la Poudre Reservoir Company.
  • Burlington-Wellington water owned 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:1980-2006
    Format:documents (object genre)
    Documents related to GASP's shares in the Burlington Ditch, Reservoir and Land Company and the Wellington Reservoir Company.
  • Water reserved 2005, Up and B, Wind, New Cache, Rothe, Riverside, HHR Farms, OWW, Condon, Dinsdale 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:2005
    Format:correspondence
    Letters from GASP to shareholders allowing them to reserve 1 Private Right of Riverside Reservoir, Jackson Lake, and Greeley #3 stock from sale.
  • Water order forms 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:1976
    Format:documents (object genre)
    Water orders for Prewitt and Union Reservoirs and Colorado-Big Thompson water.
  • Water adjudication file #2 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:1977-1983
    Format:documents (object genre)
    Well adjudication documents for GASP.
  • Union Reservoir water sale 1031 Corporation / GASP 2 share union 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:1996-2000
    Format:documents (object genre)
    Documents concerning 1031 (tax deferred) exchanges and business done between the 1031 Corporation and GASP.
  • Water adjudication file #1 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:1975-1982
    Format:documents (object genre)
    Well adjudication documents for GASP.
  • Union Reservoir 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:1989-2000
    Format:documents (object genre)
    Correspondence, agreements, and administrative documents concerning GASP shares in Union Reservoir and City of Longmont agreements with the Union Reservoir Company.
  • 3 shares union 1031 Corporation 

    Creator(s):Groundwater Appropriators of the South Platte River Basin, Inc. (GASP), author
    Date:1976-2000
    Format:documents (object genre)
    Documents concerning 1031 (tax deferred) exchanges and business done between the 1031 Corporation and GASP.

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