C153623 Extension Letter

• Contract/PO #: C153623
• Contractor Name: Sanchez Ditch and Reservoir Company
• Contract Type: Loan
• Water District: 24
• County: Costilla
• Loan Projects - Doc Type: Approval Letter

Sanchez Ditch and Reservoir Agenda Item 23c
September 18, 2012 (Updated October 4, 2012)
Page 3 of 8
The Company's decreed water rights are dated from 1856 and go through 1934 for a total of 373.95
cfs. Sanchez Reservoir specifically has a decreed storage right of 103,155 AF. On average the
Company delivers 15,000 AF annually.
Project Description
The objective of this Project is to address the safety and operational management concerns at the
reservoir by demolishing the gate tower and modifying the outlet works.
Several alternatives were considered including: 1) repairing the tower and conduit and upgrading
the gates and control system; 2) repairing the tower and replacing the existing tower gates with four
larger gates; 3) demolishing the tower and replacing the outlet conduit with a new intake structure;
and, 4) the do- nothing alternative. Additional options were also investigated to improve the tower
access by the installation of a pedestrian bridge or the installation of a ladder on the outside of the
tower.
The Company chose alternative 3 to demolish the tower. This alternative includes: demolition of
the gate tower; the installation of new control gates and operators; lining the existing outlet conduit
with shotcrete; repairing the downstream outlet structure; and, installing a new perimeter drain and
weir along the right side of the outlet structure to control seepage.
Preliminary engineering documents have been prepared and used for estimating the total project
cost summary as provided in Table 1.
TABLE 1: TOTAL PROJECT COST SUMMARY
Task
Cost
Final Engineering and Construction Management
$225,000
Construction
$1,528,000
Contingency
$279,000
Total
$2,032,000
The Project schedule is as follows: final design and State Engineer's Office (SEO) approval
between January 2013 and January 2014; bid the project in May of 2014; award the bid by June of
2014; start construction in September of 2014; complete construction by March of 2015.
TABLE 2: PROJECT FUNDING SUMMARY
WSRA Grant
Rio Grande River Basin
$55,000
Statewide
$859,400
TOTAL
$914,400
CWCB Construction Fund Loan
$1,117,600
Total Project Cost
$2,032,000
CWCB will disburse funds at a rate of 55% loan to 45% grant of each invoice amount for Project
related expenses, up to the approved limit of $2,032,000.