Arkansas - Round Mountain Water System Improvement Project_Full Application

• Basin Roundtable: Arkansas
• Applicant: Round Mountain Water and Sanitation District
• Description: Round Mountain Water and Sanitation District Water System Improvement Project
• Account Source: Basin
• Board Meeting Date: 5/22/2007
• Contract/PO #: 150403
• WSRA - Doc Type: Grant Application

Round Mountain Water and Sanitation District (RMWSD)
Water System Improvements Project

ATTACHMENT C

( continued)

WATER INFRASTRUCTURE RECOMMENDATIONS

WATER MASTER PLAN

. Develop and implement a plan for a third water zone (Zone 3) to correct low-pressure problems on the
east side of the service area.

o Two options were analyzed; and both options could provide acceptable service to an elevation
of 8100'.

· The first option includes the addition of a new water tank at an elevation of 8200' to
serve Zone 3 and the two existing Zones 1 & 2. This option adds total storage to the
water system, and increases fire flow capacity and pressure in all three zones.

· The second option is a pump station to boost existing tank static pressure to serve Zone
3. This is a lower-cost option. The disadvantage of this option is that it does not
increase fire flow capacity or domestic storage capacity (future growth capacity) for the
system

. Install a well and treatment system at the gallery site and install a distribution system to connect the
new well/treatment facility to the existing district distribution system in Zone 2.

o Due to budget constraints, the affordable distribution main option is the shortest possible route,
which is west of Highway 69.

o The preferred route is east of Highway 69 along the boundary of Nordyke, Columbine Business
Park, Odum and Haga to the intersection of Strait Street and Fourth Street. This route will
require landowner participation to fit into the proposed budget and project baseline.

Appendix B provides a map of the three proposed water zones and shows potential new storage tank
locations. Appendix C contains opinions of probable costs (rough estimates) for each option. Appendix D
contains simple schematics of the new piping and pumps required for each option to isolate and implement
a Zone 3 in the system.

DISTRIBUTION SYSTEM

. Water mains should be looped to maximize fire flow potential for the existing static pressure. Loops
should be 8 inch in diameter minimum. Main sizes should be determined by analysis using the needed
fire flow.

. Mains with long lengths and serving commercial areas should be sized for the appropriate fire flows.
Mains in excess of 8" may be required in some circumstances.

. Require 8" minimum water main sizes. Require developers to show engineering pressure drop
calculations and residual pressures for fire flows to ensure new developments are designed to the fire
code.

. Develop a main replacement plan for all mains running in an east-west (Silver Cliff) or north-south
(Westcliffe) direction that have a diameter of less than 6 inches. Also plan for replacement or addition
of a north-south loop connection at least every two blocks where a main of 6 inches or greater does not
exist.

. Develop a plan to upgrade the main along Main Street in Silver Cliff and Silver Cliff Avenue in
Westcliffe to a size sufficient to support commercial fire flows as identified from an ISO audit. The size
of the line will depend somewhat on the approach to the Zone 3 implementation and storage tank or
pump station implementation.

. Mark existing fire hydrants in the system that are not connected to a minimum of a 6 inch line with a
different color to clearly identify hydrants with substandard flow capacities. Consult with the Fire District
for a recommendation prior to implementation.

5b