CT2016-2515 Approval Letter

• Contract/PO #: CT2016-2515
• Contractor Name: Lookout Mountain Water District
• Contract Type: Loan
• Loan Projects - Doc Type: Approval Letter

Lookout Mountain Water District Agenda Item 7a
November 18-19, 2015 Board Meeting(Updated November 20, 2015)
Page 4 of 6
estimated project cost of $3,410,000 for engineering and construction, this option was chosen as the
most cost-effective approach.
Alternative 3 - Add storage by dredging within Upper Beaver Brook Reservoir with construction of a
labyrinth weir spillway: This alternate was not selected due to higher costs, loss of use of reservoir
storage during construction, and potential impacts to adjacent wetlands. Estimated project cost:
$4,709,000.
Alternative 4 - Add storage at alternative dam sites downstream of Upper Beaver Brook Dam: Two
sites for new roller compacted concrete dams were considered, with costs upwards of $8,000,000. This
alternate was ruled out due to the high cost and potential difficulty in permitting new dam sites.
Each alternative was evaluated with respect to costs, impacts to operations, practicality, and
permitting. The selected alternative involves construction of a new labyrinth weir spillway to
accommodate increased reservoir storage, rehabilitation of the outlet works, construction of a
downstream toe berm, addition of a toe drain, and enlargement of a section of the spillway chute wall.
The existing dam access road at the reservoir will be raised and relocated approximately 10 feet above
and outside of the increased reservoir storage footprint
TABLE 2: ESTIMATED PROJECT COST
Task Cost
Engineering Design &t Permitting $390,000
Construction $3,020,000
Total $3,410,000
Permitting: A wetlands survey was conducted for the selected alternative, and a 404 permit will not
be required since all construction will occur above the existing Ordinary High Water Mark. A Standard
Form 299 Application was submitted in March of 2014 to the USDA/USFS for project impacts pertaining
to temporary construction staging and water levels.
Schedule: Final design documents were submitted to the State Engineers Office in October of 2015.
Assuming a review process of four to six months, construction is anticipated beginning in spring of
2016, completing by fall of 2017.
Financial Analysis
The District qualifies for the current high-income municipal rate of 3.25% for a 30-year term.
In 2012 and 2013, the District applied to the Department of Local Affairs (DOLA) for the Energy and
Mineral Impact Assistance Program, Tiers I and II. In 2013, the District was awarded a grant of $125,000
for matching funding up to $345,000 in actual engineering costs for the project.