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3 '-'6- to 1890. All other dietricts wer~ a decade or two later. The atoring of water for late summer use has done much to increase the productivity of agriculture. . In 1890, Terry Lake rsservoir, just north of Fort Collins, was con- struoted by the Larimer and U,eld Canal. Horaoe G. Clark described the ohange which that reservoir had made in the 'lives of farmers living Under it, before tha Ninetsenth Irrigation Congress in Chicago in 1911. Mr. Clark who was a water user of ths Larimer and Weld, saidl "I was a farmer undsr this ditoh, and with othsrs, suffered from an insufficient supply of watsr. We looked with jealoua eye on the profitable crops of potatoes grown by our brothers under old Greeley Ditoh Number Two . . . . We oould not raise potatoes. And we had frequently to irrigate our grain crop whsn it was too early--when it bakad in the ground, turned the grain yellow, and out the yield down one-third-for fear we would make no crop at all for laok of water later on. About one orop of alfalfa-the first--and a half orop the second cut. .'. That was our condition under the Eaton Ditch . . . .prior to the advsnt of Terry Lake.11 Anothe~ phase of this search for more water with which to devslop a higher agriculture was the devslopment of interbasin and tranemountain divsrsion. The Larimer County Ditoh was ths agency that pioneered in this field. A. A. Edwards, dirsctor and secretary of that company, was the man who promoted this dsvelopment. In 1890 the Larimer County Ditch was started. Since it was the last but one of the major ditche~ on the river, its stream t'low rights were very poor. That same year the company began to build the Grand River Ditoh to intersect saveral tributarias cf the Colorado River, and to bring the water over poudre Pass into the South Fork. In 1891 heavy rains washed out Chambers Lake dam, which the Larimer County Ditoh Company had aoquirad and snlarged. As a result of the damages caused it was thought bast to reorganize, so ths Water supply and storage oame into existence. This oompany oompleted the Larimer oounty Ditch and several diversion projects. The "Sky Line" Ditch was begt1ll in 1891 and ccmpleted 2 years later. This was an inter- basin project, bringing watsr from the Laramie River to the Poudre. The new oompany also oompleted the Grand River Ditoh in 1895. The Sand Cresk Ditoh diverting from Sand Creek and Deadman Creek into Sheep Crssk was built in 1899. The largest of all the diversions, untU the Big Thompson, whioh was constructed and operated by the Laramie-Poudre D:l:strict was the Laramie-poudre system. It was begun in 1910 and completed'2 ysars later. The tunnel through whioh the water was brought aoross the dividing mountains had a oapaoity of 1,500 second-feet. This projeot ' provoked Wyoming into bringing a suit against Colorado. Ths resulting Supreme Court decision in this case limited tha amount that could be diverted to a small fraction of the oapaoity of the system, and has prevented any further diversion projects from the North Platte and Laramie watersheds. These diversions bring into the poudre watershed about 25,000 acre-feet eaoh season, and it has gone for the most part, not to irrigate new land, but to improve agriculture on land alraady under irrigation. .