FLOOD08628

• County: Costilla
• Community: San Luis
• Stream Name: San Luis area drainageway
• Basin: Rio Grande
• Title: Master Drainage Study Town of San Luis
• Date: 12/1/1988
• Prepared For: San Luis
• Prepared By: WRC Engineering, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

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collection pipe

was considered.

$100,000 and

const ruct i on.

discharging into the Vega south of 6th Street
Est imated costs for the system are between
150,000 depending on the difficulty of

4.

Recommendat ions

Based on review of preliminary costs as well as the ability for the
system to function with a minimum of human intervention, WRC
recommends that a grav ity flow subdrai n system be i nsta 11 ed in the
northeast section of the Town of San Luis. Preliminary Design for
the recommended system is shown on Sheet 1 of 4 of the drawings and
is described as follows:

Three 10" PVC perforated pipes will be placed between Pedro Street
and Casa Verde Street at the following locations - the north edge of
town, along 9th Street and along 7th Street. These three lines will
drain to a solid PVC collection line (10" to 12" diameter) which
will run the length of Salazar Street and will be extended south to
discharge into the Vega.

At the junction of the perforated pipes and the solid pipes in
Salazar Street, 4' 1.0. manholes will be installed. At each of the
upper ends of the perforated pipes, PVC cleanouts will be installed.
In addition three cleanouts will be installed in the Salazar Line at
10th, 8th and 6th Streets. Depths of the North Line and 9th Street
Line will be a minimum of 8 feet with the minimum depth of the 7th
Street Line being approximately 4 feet. Each leg of the parallel
lines will have the ability to carry 0.7 cfs. The main line in
Salazar Street will have a capacity of from 1.7 cfs to 2.6 cfs and
will discharge some 300' south of 6th Street into the Vega. Details
of trench excavation and backfill are shown on Sheet 1 of 4 of the
drawi ngs.

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