15a

• Board Meeting Date: 7/11/2007
• Description: CF Section- New Project Loans - Henrylyn Irrigation District - Horse Creek Reservoir and Prospect Reservoir Rehabilitation
• Board Meetings - Doc Type: Memo

Henrylyn Irrigation District
July 11-12, 2007

Agenda Item 15a

full. Because this loan contract exceeds $400,000, the Irrigation District Law of 1905 requires the
HID to hold a special election of the legal electors in the district to authorize and ratify the contract.
C.R,S. 37-41-113(4), The election must follow the same procedures that the district would follow to
authorize the issuance of a bond. (C.R.S. 37-41-117.)

Water RiQhts

The HID owns 123 shares (or 5.8%) in the Burlington Ditch, Reservoir and Land Company, and
2,759.147 shares (or 20.30%) in the Farmers Reservoir and Irrigation Company's (FRICO), Barr
Lake Division. In addition, HID has decrees for diverting through the Burlington Canal headgate,
for the Denver-Hudson Canal, 300 cfs, with appropriation date of 11/28/1907 and adjudication date
of 11/12/1924; and the South Platte and Sand Creek Diversions, 100 cfs, with appropriation date of
8//1976 and adjudication date of 7/10/1989; and the following reservoir decrees:

Reservoir
Horse Creek Reservoir
Horse Creek Reservoir
Prospect Reservoir
Prospect Reservoir
aids Reservoir
aids Reservoir
Lord Reservoir

Storage
acre-ft.
16,965
2,550
5,970
1,690
534
548
775

Proiect Description

Appropriation
Date
3/17/1911
7/20/1922
11/21/1910
7/20/1922
1/28/1918
6/15/1922
6/4/1906

Adjudication
Date
11/12/1924
11/12/1924
11/12/1924
11/12/1924
11/12/1924
11/12/1924
11/20/1897

1. The no-action alternative.
2. Repair critical reservoir dam and outlet works components. ($2,403,000)
3. Complete rehabilitation of reservoir dam and outlet works. ($10,097,000)

Alternative 1, No-action alternative - This was considered unacceptable for Horse Creek
Reservoir since the result of not repairing the outlets and controlling the seepage in the dams would
ultimately result in major restrictions on the reservoir storage within 5 years. It was not acceptable
for Prospect Reservoir due to the potential for piping failure along the outlet.

Alternative 2, Repair critical reservoir dam and outlet works components - This included repair
and lining of the outlet conduits, repair of the inlet and outlet structures, and resurfacing the dam
crest. For Horse Creek Reservoir, it also included installing toe drains,

Alternative 3, Complete rehabilitation of reservoir dam and outlet works - This alternative
considered complete rehabilitation of the dams including breaching and replacing the outlet works,
applying riprap bedding and riprap to the upstream face of the dam from the dam crest to the
upstream toe. In addition, for Horse Creek Reservoir this alternative would include installing toe
drains.

Selected Alternative 2 Repair critical reservoir dam and outlet works components -
Alternative 2 was selected by the HID Board based on cost. The selected alternative, Alternative
No, 2, involves the below-listed construction with cost estimates,

Horse Creek Reservoir

Construction:

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