Transcript Engineers Without Borders – USA Colorado Springs

Pipeline Crossing
Suncallo, Bolivia
Mountain TAC Presentation
October 4th, 2010
Engineers in Action
Community Introduction
Suncallo, 48 families, Aymara Indian
Geography
http://www.ewbcos.org/projects/bolivia/Hike_to_Water_Sources.kml
Topography
Community Industry
Community Organization
Elected officials serving a one-year term
 Positions include:

◦
◦
◦
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
Mayor
Water Board
School Board
Roads Board
Memorandum Of Understanding (MOU) was
presented to community by Suncallo leadership
for concurrence before formal signing
Current Water Sources
Initial system installed by Catholic Church
 Spring-fed gravity system with a one-inch polyethylene
pipe distribution to most homes (0.47 liters/sec)
 Second spring further up the mountain added by West
German NGO (0.81 liters/sec)
 No Storage

Pipeline Crossing #1

40 foot span between Suncallo & Spring 1
Pipeline Crossing #1 - Closeup
Spring #1 -
Pipeline Crossing #2

60 foot span between Spring1 & Spring 2
Pipeline Crossing #2 - Closeup
Spring #2 -
Proposed Projects

Stabilize Existing System
◦ Pipeline Crossings
◦ Improve Spring Intakes
Add Storage Capacity
 Develop Additional Spring
 Provide Additional Water Taps
 Develop Sanitation Solution
 Agriculture Improvements

Summer 2011
Suspension Crossing - Design
Used design guide from Peace Corps
 Sleeve concept allows transition to 2”
galvanized for future expansion
 Design uses turnbuckle to achieve
required design forces
 Design uses 3/8in rebar which can be
easily bent in the field
 Proposed anchor has simple shape to
facilitate construction of concrete forms

Suspension Crossing - Design

Subject to loads:
◦ Vertical Component = 285 lbs
◦ Horizontal Component = 1226 lbs

Anchor Dimension–3.5’H x 3.5W x 3.75L

Cable/Stringers - 6x19 ¼”dia – 2.0’ sag
Suspension Crossing - Materials
All materials are locally available
 Material availability and pricing were
coordinated with Engineers In Action
(EIA)
 EIA will pick up and deliver materials to
the worksite

Suspension Crossing – Labor
Community will provide manual labor
 Community has some previous concrete
experience and can gain additional handson training from this project
 EIA will hire and provide jobsite foreman
with necessary concrete skills

Sustainability
Little maintenance required
 Provide training on use of turnbuckle
 Design concept already in use by
neighboring community

Engineers In Action
Supports EWB teams and projects
throughout Bolivia
 Project Lead – Marcos Robison

◦ Senior majoring in Civil Engineering

Supervising Engineer – Milton de la Cruz
◦ Degreed Civil Engineer (1996)
EIA Projects Supporting EWB

An example of supervision work done by
Milton de la Cruz. It was completed
before EWB MST arrived to finish up the
ferrocement tank. He and the community
measured, bought materials and placed the base
for the ferrocement tank. This project is Erquis
Sur - Los Eucaliptos Potable Water Provision
with EWB-MST in partnership with Habitat for
Hummanity in Tarija, Bolivia.
Erquis Sur - Los Eucaliptos Potable Water
Provision
Erquis Sur - Los Eucaliptos Potable Water
Provision
Erquis Sur - Los Eucaliptos Potable Water
Provision
Erquis Sur - Los Eucaliptos Potable Water
Provision
Questions????