Under provisions of the act of Congress approved June 28, 1946 (60 Stat. 333-338), contracts were executed June 28, 1951, by the United States with the Lower Little Horn and Lodge Grass Irrigation District and the Upper Little Horn Irrigation District providing for the payment, over a period of 40 years, by each of the Districts of its respective share of the sum of $210,726 expended for the construction of the Willow Creek storage works on account of non-Indian lands within the Districts entitled to share in the storage water, directly or by substitution.

Within the Lower Little Horn and Lodge Grass Irrigation District there are 3,196.8 acres for which the District is obligated by contract to pay its proper share of the total construction costs. Within the Upper Little Horn Irrigation District there are 1,554.7 acres for which the District is obligated by contract to pay its proper share of the total construction costs. There are 3,237.6 acres, more or less, covered by contracts with private landowners, obligating such owners to pay their proper share of such construction costs. The total per acre charge against all such lands is $26.38. This amounts to an annual per acre rate of $0.6595. For the purpose of this notice the annual per acre rate is hereby fixed at $0.66. This annual per acre rate of assessment will continue for a 40-year period within which the total amount of construction costs of $210,726 is to be repaid without interest. The amount of each annual installment chargeable against each of the Districts for the acreage covered by their respective contracts shall be determined by multiplying the total acreage, under each contract entitled to Willow Creek storage rights, either directly or by subsituation, by the per acre annual rate.

Notice is hereby given of an annual assessment of $2,108.05 to be repaid by the Lower Little Horn and Lodge Grass Irrigation District for the 3,196.8 acres of irrigable land of the District, and an annual assessment of $1,025.06 to be repaid by the Upper Little Horn Irrigation District for the 1,554.7 acres of irrigable land of the District. Against the amounts due annually by the Districts under this notice, there shall be allowed any credits due under section 6 of the act of June 28, 1946. Credits due on behalf of any land shall be reflected by the respective Districts when placing against such land the annual assessment on the tax rolls.

Annual assessments shall be paid by the Districts to the United States, one-half thereof on or before February 1 and one-half thereof on or before July 1 following, of each year commencing with the calendar year 1952.

To all assessments not paid on the due date, there shall be added a penalty of one-half of one percent per month or fraction thereof, from the due date so long as the delinquency continues.

The right is reserved to the United States to refuse the delivery of water to each of the said Irrigation Districts in the event of default in the payment of assessments, including penalties on account of delinquencies.