PROJ00294

• Contract/PO #: C153035
• Contractor Name: Carbondale, Town of
• Contract Type: Loan
• Water District: 0
• County: Garfield
• Bill Number: SB 75-468
• Loan Projects - Doc Type: Feasibility Study

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VI-II

Carbondale's present distribut ion system is lacking in capacity for

high flows, mainly due to lint' sizes, but another fact is that flows can

only be suppl ied from one di rection for most of the Town since the stur-

age tanks and the transmis~ion 1 ine are connected together on the same

side. Most of Carbondale's hydrants cannot supply the required fire

flows. Suggested revisions shown on Drawing 2 take into account the

necessity of improving available fi re flows. Additional criteria in-

clude sufficient valving 90 that no more than 500 feet of distribution

system be inoperative due to line repairs. The minimum line size on

dead-end lines with fire hydrants is 8-inch and the minimum on looped

lines, 6-inch. Carbondale~ present system has hydrants on lines below

both of these minimums, as small as four inches as well as hydrant con-

nector pipes of 4-inch diameter, also not meeting ISO criteria. AlII ines

smaller than 6 inches are not recognized as having any fire flow supply

capacity.

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Each hydrant should be furnished with one 4~-inch pumper nozzle and two
2~-inch nozzles and should have a 6-inch connector pipe. Most of Carbon-
dale's existing hydrants have only the two 2~-inch nozzles.

Fire hydrant spacing should meet the ISO requirements set forth in the
following Table VI-J

Fi re Flow
Rec; ui red (gpm)

I ,l)OO or less
1, :'00
2,000
2,500
3,000
3,500
4,000
4,500
5,000
5,500

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TABLE VI-J
STANDARD FIRE HYDRANT DISTRIBUTION

Ave rage Area/
Hydrant (s.f.)

160,000
150,000
140,000
130,000
120,000
110,000
100,000
95,000
90,000
85,000

Fi re Flow
Requ ired (gpm)

6,000
6,500
7,000
7,500
8,000
8,500
9,000
10,000
11,000
12,000

Ave rage Area/
Hydrant (s.f.)

80,000
75,000
70,000
65,000
60,000
57,500
55,000
50,000
45,000
40,000