Technical Report: 'Improvement of the Drinking Water and Sewage System of the City of Juanjui'

Descriptive Memory

IMPROVEMENT OF THE DRINKING WATER AND SEWAGE SYSTEM OF THE CITY OF

JUANJUI

I. BACKGROUND

This project corresponds to the Definitive Study at the Technical File level of
Project "Improvement of the Potable Water and Sewer System of the city of
Juanjui with SNIP code 59351, which includes a comprehensive study that proposes
solve the problems of potable water supply, sewerage, and disposal
final of the wastewater of the City of Juanjui
Currently, this city is supplied by surface and surface sources.
the treatment given to these in order to purify the water has deficiencies due to
design and operation & maintenance problems of the treatment plant
drinking water, likewise the age of the networks, the lack of sectorization aggravates more
the problem of providing a 2-hour service continuity in each of the different ones
city zones, it is also estimated a loss percentage of over 50%, which
it worsens the water scarcity problem mainly caused by deforestation
from the areas surrounding the micro-watersheds where the water is collected.

Regarding the existing sewer system, areas where the networks have a
over 30 years old, so it is necessary to renew them, likewise the
The city's drainage discharge is made directly into the Huallaga River and without any
type of treatment.

Likewise, with the present study and the execution of the works detailed in it, there will be given
solution to the sanitation problems of the city, all this with the construction of
a drinking water system with new supply sources and implementation of
the sectorization in distribution networks, which together with micromeasurement to
It is projected to reduce losses by up to 30% throughout the entire period.
design.

regarding the sewage system, there is a proposal to renew the networks whose
Antiquity is greater than 20 years, likewise expansions are projected for the areas that
they lack such service, thus a coverage of 85% is projected once
The work is completed and has reached up to 92% by the end of the design period.
Finally, in order to provide a solution to the pollution generated by the discharge of the
drains to the Huallaga River, the construction of a water treatment system is projected
wastewater through stabilization lagoons.

II. LOCATION

The City of Juanjui includes: Juanjui Cerado, neighborhoods La Merced, Juanjuicillo, Santa
Rosa, San Juan, la Victoria, Puerto Cangrejo and also the C. P. M. Villa Prado.

Department : Saint Martin

Province : Marshal Cáceres
City : Juanjuí

DESCRIPTIVE MEMORY
 Technical File: "Improvement of the Drinking Water and Sewage System of the City of Juanjui"

III. CLIMATE

The average annual total rainfall varies between 1500 to 1700mm. The highest
precipitations occur between October and April, with December being the month that records the
highest value.

The temperature corresponding to this climate type fluctuates between 25.5ºC and 30.4ºC.
winds recorded with averages of 6.8 km/h coming from the Northeast, 6.9 km/h coming from the East
and 5.1 km/h southward. The Relative Humidity in Juanjui is recorded at 75%.
The project's area of influence is governed by climatic conditions of type
Tropical, in which there are two factors that exert great influence on the environment
environment, these are: precipitation and temperature. During the rainy season, the
precipitations are intense and frequent causing erosion, landslides, and collapses,
especially in those areas with steep topography and devoid of
vegetation cover. The weathering of rocks and soils is influenced by the
thermal variations of the ambient temperature. Temperature changes, during the
geological history cracks the rocks, weakening them for modification by
more complex geological phenomena such as erosion. The highlights include
they refer to processes of soil or rock movement caused by agents
natural or human activities that alter the morphology and pose risks
of great impact on environmental conservation.

IV. TRANSPORTATION AND COMMUNICATION ROUTES

Land Route:

The city of Juanjui communicates with all the provinces of the Region through the
main access road, which is the Fernando Belaunde Terry highway formerly known as the Marginal of the
Jungle. The approximate time from Tarapoto to Juanjui is 3 hours and 30 minutes. Also
It has river transport through the Huallaga River.

Main Roads.

The first route departs from the city of Lima via the North Pan-American Highway, passing through
Chiclayo to Olmos, from here it continues along the access road.
completely paved that connects to the Fernando Belaunde Terry Highway (formerly Marginal of
the Jungle), covering the stretch: Bagua Grande, Pedro Ruiz, Moyobamba, Tarapoto, up to the
district of Juan Guerra; then continue on the dirt road to Juanjui, traveling
towns like Buenos Aires, Picota, San Hilarión, San Rafael, and Bellavista in the Valley of
Huallaga.

The second route from the city of Lima is via the Central Highway passing through the
Oroya, Huánuco, to Tingo María, a section that is paved; from there one has a
gravel road that continues to Juanjui, passing through the towns of Aucayacu,
Tocache and Campanilla located in the central Huallaga Valley.

Waterways:

The Huallaga River is the most important waterway for navigation.

medium-capacity vessels between the river ports related to the
city of Juanjui. The existence of bad steps and rapids between Shapaja and the Pongo of

DESCRIPTIVE MEMOIR
 Technical Report: "Improvement of the Drinking Water and Sewerage System of the City of Juanjui"

Aguirre, prevent larger capacity ships from reaching the work area, from
Yurimaguas, Iquitos and the Atlantic.
In order to facilitate the transfer across the Huallaga River, towards the towns and centers of
production of the right bank belonging to the province of Mariscal Cáceres and
towards the Huallaga –Ledoy district (from the Province of Bellavista) there are ports of
exchange, with the most important being:

Puerto Rico.
Bellavista Harbor (Vainillas).
Puerto Tingo de Saposoa.
Port Antwerp.
Crab Port.
Likewise, using smaller capacity vessels, in many cases of use
specifically, one can navigate through various rivers such as:

Huayabamba River, up to the area of Dos de Mayo (on the Río Jelache sheet -15-i).
Pachicilla River, a tributary of Huayabamba, is navigable up to the locality of
Baggage.
Abiseo River, navigable up to the Churo ravine, near the INRENA station
of the Río Abiseo National Park.

Airway:

The city of Juanjui has air access through commercial planes.

small capacity, light aircraft and helicopters. This airfield has
paved runway and is used in irregular commercial flights and military support.

V. OBJECTIVES

Project Objective
As a project, the aim pursued is to preserve people's health and improve their
quality of life within the framework of local and regional development.

General Objective
The general objective is to improve the quality of the service that is currently being provided.
provides to the city of Juanjui and other neighborhoods, optimizing the supply system
and distribution in their flagship works, with the increase in coverage and the decrease
from water waste in the household installations.

Specific Objective
From the perspective of the present document, which is part of the Technical File
from the works of the Project, it is about presenting the technical information, in description,
specifications, graphics, and plans for a good execution of work.

VI. BENEFICIARY POPULATION

The beneficiary population includes the urban population of the city of Juanjui.
which amounts to 31,250 inhabitants.

DESCRIPTIVE MEMORY
 Technical File: "Improvement of the Drinking Water and Sewerage System of the City of Juanjui"

VII. JUSTIFICATION OF THE PROJECT

In light of the existing problem of water shortages and pollution

imminent, of being able to provide water and sewage service under conditions
inadequate, violating the current regulations; which makes the
systems; the improvement and rehabilitation of the current system becomes urgent, reason
by which this project will definitively address that need,
contributing to improving the current living conditions of the supplied population.
In addition, the improvement of the quality of drinking water in all sectors of scope
the referred project will allow the company that manages UNOSA services to expand and
improve supply hours, and implement the installation program of
household micrometers to control water losses.

VIII. DIAGNOSIS OF EXISTING DRINKING WATER AND SEWAGE SYSTEMS

A. POTABLE WATER SYSTEM

The drinking water supply system of the City of Juanjui has a

greater antiquity a 30 years, the restricted supply service
approximately 2 hours a day, which is greater in the low-lying areas, existing
generally shortages in all the high areas (Juanjuicillo upper part and San
Felipe), and which must be covered by UNOSA through the use of tanker trucks,
For a mayor, describe the main indicators related to the water system.
drinkable

Service Continuity
In times of flood, the service is intermittent due to the disorder of the networks.
distribution, however in drought periods the population has on average 2
supply hours during the day, logically in the high areas they do not have
water during this time having to take water from the ponds
located in the lower part.
In general, the population stocks up during the night and early morning hours.

Coverage
The coverage of drinking water is 80.0%, the rest is supplied through water from
the nearby ravines and the Huallaga River.

Pressure
The service pressure in the lower parts of the city is 2.00 m. of water. The part
the supply of Juanjuicillo is provided with tanks and cisterns of water because it is not
there is sufficient water pressure.

Water Quality
The water quality is not adequate due to the drinking water treatment processes.
they are complete, all this due to existing inefficiencies in different components,
mainly in the PTAP-01 and the PE-02.

Below is a greater detail of the drinking water supply system:

DESCRIPTIVE MEMORY
Technical File: 'Improvement of the Drinking Water and Sewer System of the City of Juanjui'

SUPPLY SOURCES

Currently, the city of Juanjui is mainly supplied by 03 sources.

main ones (02 surface and 01 underground), which are detailed below:

CHAMBIRA GORGE - MARAY

This ravine runs through the northern part of the city of Juanjuí. It begins at a
approximately 1000 meters above sea level in the Rio Blanco hill and runs from Southwest to
Northeast, already in the lower part at the height of the Chambira neighborhood, it joins with the ravine.
Juanjuicillo, which flows into the Huallaga River at the height of the neighborhood of the same name.
name in the southern part of the city. These ravines run separately.
some sections of its route and join on several occasions covering
small sections together, it is precisely one of these that is used for
capture its waters to then be treated and used as drinking water for the
city, this intake is located at UTM coordinates 84 305892 and 9205790
at an altitude of 360 meters above sea level.

Basin of the Chambira River - Maray

MONTHLY FLOW RATES (l/s) OF THE CREEK

PHOTO No.01: UNION OF CHAMBIRA AND MARAY

The capture of this ravine is done through a structure to

surface captures, this one is in good condition.
but it only requires improvements in hydraulic installations
(gates and valves).

DESCRIPTIVE MEMORY
Technical File: 'Improvement of the Drinking Water and Sewerage System of the City of Juanjui'

WHITE RIVER CANYON

Similar to the previously described one, it originates at an altitude of 1000 meters above sea level in the
Cerro Rio Blanco and traverses the southern part of the city through the El Porvenir neighborhood, also
it is a tributary of the Juanjuicillo Ravine and its waters are captured for the system
of drinking water from the city at the height of the UTM coordinates 84 306019 and
9207304 at an altitude of 379 meters above sea level.

BROKEN VALLEY WHITE RIVER

MONTHLY FLOW RATES (l/s) OF THE CREEK

PHOTO NO.01: WHITE RIVER CANYON

The capture in this ravine is through a lateral concrete structure.

embankment that is composed of a dam with an overflow spillway and a channel
lateral that allows water to enter the collection box, its condition of
The condition is regular, with an age of 34 years.

CHAQUISHCA GORGE
It has its origins at heights of about 1000 meters above sea level, in the northern part of the hill.
Rio Blanco flows over a large area and empties into the Huallaga River at the
height of the La Victoria neighborhood. This ravine provides drinking water to the neighborhoods of

DESCRIPTIVE MEMORY
Technical File: "Improvement of the Drinking Water and Sewer System of the City of Juanjui"

La Victoria and Villa Prado in the northern part of the city of Juanjuí, their capture is
located at UTM coordinates 84 307994 and 9210334 at an altitude of 330 meters above sea level.

Chaquishca Broken Basin

PHOTO Nº01: RIO BLANCO CANYON AND SURFACE CAPTURE IN THE MENTIONED CANYON.

Currently, these surface water sources have been decreasing their flow, due to
to the indiscriminate logging of forests and due to a lack of adequate control of the
exploitation of forest resources and an environmental management program.

Regarding the water quality of both sources, we can say that in

summer seasons show turbidity lower than 50 UNT and during rainy seasons the
Turbidity reaches very high levels with peaks exceeding 2000 NTU.

SANTA ROSA WELL "PE-02"

In early 1999, the artisanal well located in the area was put into operation.
Santa Rosa, all of this in order to alleviate the demand of the population.

DESCRIPTIVE MEMORY
Technical Report: 'Improvement of the Drinking Water and Sewerage System of the City of Juanjui'

This well, as we indicated, is used to supply drinking water to a large part.

from the city of Juanjuí, is approximately 15 years old, is to
open pit with cement lining on its walls. It operates for 16 hours
per day.

PHOTO Nº01. SANTA ROSA ARTISAN WELL “PE-02”

The water from the well is pumped to a battery of 6 tanks with a

electropump with less capacity than that of pumping towards the reservoirs;
motivating the stoppage of the pumping electric pumps when the water from
these tanks are running out.

MASTERS WELL “PE-01”

There is only one tubular well (Maestranza Well), 80 meters deep, it has a
18" diameter telescopic design on the surface and starting from 33.80
the 15" diameter filter column, recently built and is not
equipped and is in usable condition (see its technical specifications in the
Annex).

The relationship of inventoried wells and their types and depths is detailed in the
Annex corresponding to the study of sources.

PHOTO NO.01. POZOTUBULAR MAESTRANZA “PE-01”

DESCRIPTIVE MEMOIR
Technical Report: "Improvement of the Drinking Water and Sewerage System of the City of Juanjui"

LINES OF CONDUCTION

Chambira–Maray Intake Pipeline to PTAP-01

The pipeline is made of Asbestos Cement and has a length of 4,100m, with
diameters DN150mm and DN200mm. This line includes: catchment - desander -
Parshall meter - treatment plant - 600 m3 reservoir. There is a by-pass at
the treatment plant that directs the flow directly to the reservoir, the line of
the conduit is 14 years old and is in good condition.
Throughout this section of the line, there are 3 air valves and 4 sludge purge valves.
one of which is damaged; missing boxes and lids to be rehabilitated.
Along this line there are clandestine connections that were made by
some land and housing owners along its path, having
including pools used by some residents of the area, affecting
this way the flow and pressure arriving at the treatment plant.

Conduction Line Rio Blanco to PTAP-01

The transmission line is 33 years old, with a total length of
2791 m, is composed of a DN200mm PVC pipe from the
catchment up to the desander and 125mm PVC DN to the existing reservoir
of 500m3. Along the entire route, there are 9 valves located in this pipe.
air and 6 purge valves, all in very good condition considering the works of
rehabilitation and renovation carried out in 1998. Currently, there is a by-pass that
it leads to the existing treatment plant; but it is not currently working due to the
scarce flow that it has, for this reason the flow goes directly to the existing reservoir
clandestine connections in this pipeline, there are even pools for
public service that is captured by the neighbors who live close to this line and in large
parts affect the flow rate and the pressure arriving at the reservoir of 500 m3.
For the corrective maintenance of the 125 mm diameter PVC pipe, it
they present difficulties, being carried out inadequately given that this type of
Pipes and their accessories are not commercial.

Drinking Water Treatment Plant 'PTAP-01'

The drinking water treatment plant that supplies the City of Juanjui was
built in 1987, it is of the Direct Filtration type.
This plant comprises the following components:

Flow meter
hydraulic
Class: rectangular landfill

Quick mix
Type: Hydraulic, rectangular weir
Application point: Hydraulic highlight
Length of the interconnection channel: 15.40 m

Filters
Filter type: Declining rate battery and self-cleaning.
Number of units: 04
Type of filter bed: Simple

DESCRIPTIVE MEMOIR
Technical Report: "Improvement of the Potable Water Supply and Sewage System of the City of Juanjui"

Area with filter: 5.51 m2

Project filtration rate: 215.6 m3/m2/d
Minimum operating rate: 129.8 m3/m2/d

Aluminum sulfate dosing

Type of dispenser: Gravity-fed solution.
Number: 01
Application form: Diffuser tube.

Chlorine Dosing
It has a chlorination booth for chlorine gas.
Type of dispenser: Solution of hypochlorite with variable load

PHOTO No.01. PTAP-01, EXISTING TREATMENT PLANT (COMPLETE RAPID FILTRATION)

For more details, see Annex No. 09 corresponding to the evaluation of Plants of
treatment.

Pumping Lines:

The pumping line runs from the artesian well PE-02 to the reservoirs.
of RE-01 (Vol=600m3) and RE-02 (Vol=500m3) before reaching these, there is a
valve box from where it branches out to reach the mentioned reservoirs.
Throughout its length, the line has a diameter of 160mm. (ø6”). The length
the corresponding section up to the 500m3 reservoir is 1250m, while the segment
From the pumping station (well) to the 600m3 reservoir is 1370m.
the common section of the pipeline towards those reservoirs has a length
of 982m.

Existing Reservoir "RE-02", Volume=600 m3

Reinforced concrete structure of the supported type, located at an elevation of 317.00 meters above sea level.

this account has a valve box in good condition and a piping system of
entry, exit, overflow and clean, also in good condition.
The hydraulic installations in this reservoir are corroded just as they are.
You can see in Photo No. 02, it will also be necessary to adjust these as they are.
You must incorporate the projected pressure line of the PE-01 'Maestranza'.

DESCRIPTIVE MEMORY
Technical File: “Improvement of the Potable Water and Sewage System of the City of Juanjui”

The supply to this reservoir is through the existing Treatment Plant and
del Pozo PE-02 "Santa Rosa".

PHOTO NO.01. EXISTING RESERVOIR RE-01, VOL=600M3, CT=317.00MSL

Existing Reservoir "RE-02", Volume=500 m3

It is a reservoir that is 2 years old, it is elevated and semi-buried.

of reinforced concrete and is located at an elevation of 312.00 meters above sea level. This has
with a valve box, likewise the supply pipe that arrives is of
DN200mm and the conveying pipe is made up of two DN150mm.
DN200mm in diameter, the overflow pipe, drainage, and cleanout are DN200mm.

PHOTO No.01. EXISTING RESERVOIR RE-02, VOL=500M3, CT=312.00MASL

The supply to this reservoir is through a line that interconnects the RE-01.
with this and from the well PE-02 2Santa Rosa, which arrives through a line of
6" DN drive.

Distribution System

There are three supply lines that supply the city, originating from the
specified reservoirs, that is: from the reservoir RE-02 (Vol=500m3), two lines stem from
translation of DN150mm and DN200mm respectively, existing in one of them a
macrometer but inoperative. From reservoir RE-01 (Vol=600m3) a pipe leaves
translation of DN200 mm in diameter, with a macrometer at the exit of
this reservoir, the one that is located in bad conditions and in state of
abandonment. From these reservoirs, the adduction lines branch out.

DESCRIPTIVE MEMORY
Technical File: 'Improvement of the Potable Water and Sewage System of the City of Juanjui'

with matrix pipes of diameters of 200mm and 150mm, these supply the network of
distribution and filler or secondary pipes with diameters of 100mm, 75mm and
50mm, with no main circuits existing with matrix pipes nor a control of
valves for circuits. There is a system of valves that do not fulfill their function
control, in most cases these valves are found without covers, only
with boxes made of larger diameter tubes that have not been manipulated in
no moment except for the case of 6 to 8 valves that function to ration
sectors (service cuts). Within the distribution network system, main pipes
and filler pipes; it distinguishes existing old pipes of approximately
40 years, corresponding to the central area of the city, and a new pipe
existing in the surroundings of the city such as Juanjuicillo, La Merced, Santa
Roses, which correspond to the Project of the 4th Stage of the National Urban Plan
(1,986) that was not completed. It is necessary to execute connections in the existing networks due to
that there is no recirculation at some points of the pipe, as some are with
caps at the ends.

Areas or streets have been identified that justify the placement of piping or line
water. And they need to complete these sections, which measure a total of 7,416 meters.
There are visible and non-visible losses in the distribution network and sanitary devices of
the users, some due to being damaged and others due to a lack of awareness and
user education on water conservation. There is a lack of a program for
installation of micrometers y macrometers for better use y
rationalization of water.

Table 1: Actual Length of Drinking Water Distribution Juanjuí

Diameter (mm) TOTAL

LONGITUDE 50 75 100 150 200

(Km) 6.6 9.1 12.72 3.2 1.87 33.49

Source: EMAPA SAN MARTIN S.A.–Juanjuí Branch.

DESCRIPTIVE MEMORY
Technical File: "Improvement of the Drinking Water and Sewerage System of the City of Juanjui"

DESCRIPTIVE MEMORY
Technical File: "Improvement of the Drinking Water and Sewerage System of the City of Juanjui"

B. SEWAGE SYSTEM

Just like the water supply lacks proper services, the service of
drainage is inappropriate, so the population meets their physiological needs
inappropriately, the most common sight in the city are latrines, septic tank
and/or open field.

Sewer Networks

The collection and disposal system for sewage is carried out by gravity, and
through service pipes with a diameter of 150 mm and 200 mm and collectors of
250 mm and 350 mm in diameter.
There are well-defined areas of sewer network systems, we have
sectors of Juanjuicillo Alto and Bajo, El Cercado, La Merced, and Santa Rosa. There are
old CSN pipes that need to be replaced due to years of service
functioning as there are also new PVC pipes especially for
sectors where the population has experienced growth.
The sewer coverage is 57.00% and the houses not connected to the system
they have blind wells in the yard of their houses.

Drainage Pumping Station 'Santa Rosa'

The wastewater from the Santa Rosa Sector is directed to a pumping chamber.
the one that drives said waters through a pressure line that crosses the
City airport, through an 8" pipe and under a sewer
pluvial TMC48", the same one that must be relocated.

PHOTO NO.01. DRAIN PUMPING STATION 'SANTA ROSA'

Collectors, interceptors, and _Emitter

The main collectors are made up of pipes with a diameter of 250 mm and 350 mm.
mm, both from CSN and PVC pipes. These collectors deliver to a main emitter,
currently rehabilitated and expanded, which delivers waste to the Huallaga River in
direct form, without any treatment at the height of the Municipal slaughterhouse area.
during the rainy season, traffic jams occur, notably due to the rainwater.
enters the sewer system through household connections.

DESCRIPTIVE MEMO
Technical File: "Improvement of the Potable Water and Sewerage System of the City of Juanjui"

DESCRIPTIVE MEMORY
 Technical File: "Improvement of the Drinking Water and Sewage System of the City of
Juanjui

C. WASTEWATER TREATMENT SYSTEM

There is no wastewater treatment system, all the drains are

they are downloaded directly as can be seen in Photo No. 01, these
Downloads are made at different points of the Huallaga River.

PHOTO NO.01. DIRECT DISCHARGE TO THE HUALLAGA RIVER WITHOUT ANY TREATMENT

The areas near the wastewater discharges are found

highly contaminated by fecal coliforms, with bad odors, the same that
upon joining with the Huallaga river, they do not achieve the self-purification required to be
used as recreational waters, which is the use that has been given to waters
below the downloads. In the following box we show results of the
water quality of the Huallaga River:

TABLE 2: WATER QUALITY IN THE HUALLAGA RIVER

Coliforms Coliforms
Cod. Sampling Point Source. Date M. Ph Chlorine mg/l
Totals Thermotolerant

1358 200m. Above Pto. Cayena Huallaga River 10/11/05 5.8

- 4300 2300

1359 Pto. Cayena Río Huallaga - 4300 1500000

1360 200m.Below Pto. Cayena Huallaga River 10/11/05 5.8 - 1100000 1,100,000

1361 Gaspar Port Huallaga River 10/11/05 5.8 - 4300 9000

1362 200m. Above Pto. Gaspar Huallaga River 10/11/05 5.8- 1500000 40000

Source: San Martin Regional Health Directorate.

DESCRIPTIVE MEMORY
 Technical File: "Improvement of the Potable Water and Sewage System of the City of
Juanjui

IX. PROJECTED WORKS

According to Fuentes' study, the projected supply system

will be composed of underground sources (Well PE-01 'Maestranza' and PE-02
Santa Rosa, surface water sources (Chambira Maray Stream and River Stream)
white) and subsurface sources (Caisson Type Capture).

Each of these supply sources will be allocated to the sectors of

supply defined by topographical and demand conditions,
these sectors are defined as follows:

According to this sectorization, the supply system regarding

projected components are detailed as follows:

Improvement and Optimization of the existing PTAP-01 Q=20 l/s.

According to the evaluation work of the Water Treatment Plant
existing potable water is projected to be optimized for a flow rate of Q=20 l/s.
This source of supply will be used together with the PE-01 for the
upper part of the city, specifically for sector 01 (San Juan, Chambira, the
Porvenir and Juanjuicillo.
The work to be carried out in this plant includes: Improvement of the system of
Dosing, construction of Pre-sedimentation Unit, construction of
Flocculators, construction of Sedimentators and Improvement of Filters.

Construction of the rapid filtration drinking water treatment plant

complete PTAP-02, Q=150 l/s
The projected plant will be located in the San Felipe area and is planned to
construction of 03 complete treatment modules using Rapid Filtration
Complete with alternative for direct filtration, each of these modules will be
of Q=50 l/s each.
This plant will supply sector 02 (Juanjui Cercado, Los Jardines, La Merced and
expansion zone E-1) and sector 05 (San Felipe, Cangrejo and expansion zone E-2).

Equipment of the PE-01 (Workshop), for a Q=25 l/s

The Pozo PE-01 located in the machine shop of the city of Juanjui, is
find perforated and cased, so the work to be done will consist of
only in:

Construction of Booth (Civil Work)

Hydraulic Equipment for suction and discharge pipes.
Electrical installations and automation for (Lighting, outlets and
Force).

DESCRIPTIVE MEMORY
 Technical File: "Improvement of the Drinking Water and Sewer System of the City of"
Juanjui

Supply of submersible pump for drinking water Qb=25 l/s,

123.00m
Supply of Vacuum Injection Chlorination System.
Supply of Control Panels for electric pump.

The PE-01 will jointly supply the sector 01 (San Juan,

Chambira and the Future, Juanjuicillo.

The operation of this well will mainly be during dry seasons and it will serve
support for the PTAP-01 plant, since during rainy seasons only the PTAP-01 plant
it will supply the demand of sector 01

Improvement and Equipment of PE-02 (Santa Rosa), for a Q=25l/s

The work to be carried out in the existing PE-02 located in the Santa Rosa area and
they will understand:

Deepening of Artisan Well for the installation of a Type well

Tubular to a depth of H=50m.
Construction of Shelter (Civil Work)
Hydraulic equipment for suction and discharge pipes.
Electrical installations and automation for (Lighting, outlets and
Force).
Supply of submersible electric pump for drinking water Qb=25 l/s,
115.00m
Supply of Vacuum Injection Chlorination System.
Supply of Control Panels for electric pump.

With the optimization of this source, it will supply RE-02, which has the purpose of
influence Sector 03 (Santa Rosa, La Victoria, Villa Prado and the expansion area E-
03).

Construction of CAISSON CAP-01 type intake for a Q=150l/s

The construction of a Caisson Type intake on the riverbank is projected.
Huallaga located specifically in the Amberes port area,

Construction of Caisson type intake structure (Civil Works)

Hydraulic equipment for suction and delivery pipes.
Electrical installations and automation for (Lighting, outlets and
Force.
Supply of turbine-type electropumps (03 units) for a Qb=50 l/s,
77.00m
Supply of Control Panels for electric pumps.

This intake will supply the PTAP-02; in the first stage, this
will have 03 pumping units (02 units + 01 reserve), which
they will supply a Q=100 l/s and in the second stage a fourth unit will be incorporated (03
and 01 of reserve) to supply the total demand flow of Q=150 l/s.

Construction of the Supported Reservoir RP-01, Vol=2500m3

The construction of this reservoir is projected, which will be located at PTAP-02, in
the elevation 300.00 masl with a Vol=2500m3, this will be circular in shape.
This reservoir will supply sector 02 (Juanjui Cercado, Los Jardines, La Merced and
expansion zone E-1) and sector 05 (San Felipe, Cangrejo and expansion zone E-2)
the items included in the construction of the reservoir are detailed in
continuation:

DESCRIPTIVE MEMORANDUM
 Technical File: "Improvement of the Potable Water and Sewage System of the City of
Juanjui

Civil works.
Architecture.
Structures.
Hydraulic installations.
Electrical installations.
Measurement and control systems.
Sum/Inst. of overflow line.

Similarly, this reservoir with a volume of 2500m3 will be supplied through a

re-pumping of a Q=6.5 l/s, to the RP-02 which has the supply zone of the
sector 05 (San Felipe, Cangrejo and expansion area E-2).

Construction of the Supported Reservoir RP-02, Volume=150m3.

The construction of a supported reservoir located at the elevation is projected.
345 meters above sea level, this reservoir will be supplied through a pumping system from the RP-01.
The area of influence of this reservoir will be sector 05 (San Felipe and area of
expansion), likewise the tasks to be developed will be the following:

Civil works.
Architecture.
Structures.
Hydraulic installations.
Electrical installations.
Measurement and control systems.
Overflow line sum/installation DN200mm PVC-UF.

Improvement of existing reservoirs RE-01 Vol=600m3 and RE-02 Vol=500m3

The improvement of the existing reservoirs is considered within the project.
which includes the following jobs:

Improvement and rehabilitation of the existing civil infrastructure (includes

repair and waterproofing work, among others)
Complete renovation of the hydraulic installations.

With these improvement works, it is intended to optimize sector 01 (San Juan,

Chambira and the Future, Juanjuicillo) with the reservoir RE-01 and Sector 03
(Santa Rosa, La Victoria, Villa Prado and the E-03 expansion area) with the RE-02.

Installation of the PE-01 to RAE-01 Propulsion Line

Sum/Inst. of Pipe DN 160, PVC-UF C-15, L=825.00m in TN.

Installation of the CAISSON CAP-01 Pumping Line to the PTAP-02

Sum/Inst. of Pipe DN 400, PVC-UF C-10, L=1460.00m in TN.

Installation of the RP-01 to RP-02 Pumping Line

Sum/Inst. of Pipe DN 110, PVC-UF C-10, L=460m in TN.

Renovation and expansion of drinking water distribution networks.

The work includes 100% network renewal, as well as the new
the system distribution has been sectorized in order to facilitate system operation,
the goals to be developed are described below:

RP-01 transmission line, DN500, L=1000.00ml.

DESCRIPTIVE MEMORY
 Technical File: 'Improvement of the Potable Water and Sewer System of the City of
Juanjui

Adduction Line RE-01, DN160, L=24.00ml.

Adduction Line RE-02, DN200, L=140.00ml.
Adduction Line RP-02, DN110, L=85.00ml.
Distribution Networks:
PVC-UF PIPE NTP ISO 4422 C-7.5 DN 63, L=3276.00ml
PVC-UF PIPE NTP ISO 4422 C-7.5 DN 110, L=42621.00ml
PVC-UF PIPE NTP ISO 4422 C-7.5 DN 160, L=10070.00ml
PVC-UF PIPE NTP ISO 4422 C-7.5 DN 200, L=7127.00ml
PVC-UF PIPE NTP ISO 4422 C-7.5 DN 250, L=1718.00ml
PVC-UF PIPE NTP ISO 4422 C-7.5 DN 315, L=637.00ml
PVC-UF PIPE NTP ISO 4422 C-7.5 DN 350, L=273.00ml
PVC-UF PIPE NTP ISO 4422 C-7.5 DN 400, L=1084.00ml
PVC-UF PIPE NTP ISO 4422 C-7.5 DN 500, L=193.00m

Renovation and expansion of domestic drinking water connections

Sector 1: 1326 household connections of drinking water.

Sector 2: 4036 household connections for drinking water.
Sector 3: 457 household connections for drinking water.
Sector 5: 106 home connections for drinking water.

Micrometrics

Sector 1: 1326 micrometers.

Sector 2: 4057 micrometers.
Sector 3: 457 micrometers.
Sector 5: 106 micrometers.

Electrification of general drinking water works

Understand the electrification of the general works of drinking water, which are
they detail below:

Medium voltage electrification of PE-01.

Medium voltage electrification of the PTAP-02.
Medium voltage electrification of the Caisson CAP-01
Low voltage electrification of RE-01.
Low voltage electrification of RE-02.

RENOVATION AND EXPANSION OF SEWER NETWORKS

Renovation of Sewer Networks:

SUM/INST. PVC-UF PIPE NTP ISO 4435 S-25 DN 200, L=11,473.31ml

SUM/INSTALLATION PVC-UF PIPE NTP ISO 4435 S-20 DN 200, L=171.30m
CONSTRUCTION OF MAILBOX Di=1.20, H=1.01m–1.50m, 94 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=1.51m–2.00m, 70 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=2.01m–2.50m, 14 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=2.51m–3.00m, 07 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=3.01m–3.50m, 01 UNIT

Expansion of Sewer Networks:

DESCRIPTIVE MEMORY
 Technical File: "Improvement of the Potable Water and Sewerage System of the City of"
Juanjui

SUM/INST. PVC-UF PIPE NTP ISO 4435 S-25 DN 200, L=6,388.49ml

SUM/INSTALLATION PVC-UF PIPE NTP ISO 4435 S-20 DN 200, L=699.43ml
CONSTRUCTION OF MAILBOX Di=1.20, H=1.01m–1.50m, 78 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=1.51m–2.00m, 09 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=2.01m–2.50m, 13 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=2.51m–3.00m, 05 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=3.01m–3.50m, 03 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=3.51m–4.00m, 04 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=5.01m–6.00m, 01 UNIT

RENEWAL AND INSTALLATION OF MAIN COLLECTORS AND INTERCEPTORS

Santa Rosa Collector

SUM/INST. PVC-UF PIPE NTP ISO 4435 S-25 DN 315, L=288.79ml

SUMP/PIPE PVC-UF NTP ISO 4435 S-20 DN 315, L=438.98ml
CONSTRUCTION OF MAILBOX Di=1.20, H=2.51m–3.00m, 03 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=3.01m–3.50m, 02 UNITS
MAILBOX CONSTRUCTION Di=1.20, H=3.51m–4.00m, 01 UNIT
CONSTRUCTION OF MAILBOX Di=1.20, H=4.01m–5.00m, 05 UNITS

Victory Collector

SUM/INST. PVC-UF PIPE NTP ISO 4435 S-25 DN 200, L=588.82ml

CONSTRUCTION OF MAILBOX Di=1.20, H=1.01m–1.50m, 04 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=1.51m–2.00m, 03 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=2.51m–3.00m, 01 UNIT

Interceptor Juanjui

SUM/INSTALLATION PVC-UF PIPE NTP ISO 4435 S-25 DN 350, L=454.46ml

PVC-UF PIPE INSTALLATION NTP ISO 4435 S-25 DN 500, L=207.62ml
SUM/INST. PVC-UF PIPE NTP ISO 4435 S-20 DN 500, L=1894.50ml
CONSTRUCTION OF MAILBOX Di=1.20, H=1.01m–1.50m, 01 UNIT
CONSTRUCTION OF MAILBOX Di=1.20, H=1.51m–2.00m, 06 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=2.01m–2.50m, 05 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=2.51m–3.00m, 04 UNITS
CONSTRUCTION OF MAILBOX Diameter=1.20, Height=3.01m–3.50m, 04 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=3.51m–4.00m, 05 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=4.01m–5.00m, 19 UNITS
CONSTRUCTION OF MAILBOX Di=1.20, H=5.01m–6.00m, 10 UNITS

DRAINAGE PUMPING CHAMBER CBD-01

Construction of Booth and Caisson (Civil Work)

Hydraulic equipment for suction and discharge pipes.
Electrical installations and automation for (Lighting, sockets and
Force).
Supply of 03 submersible electric pumps for wastewater Qb=50
l/s, ADT=27.50m, Pot=35HP (minimum) each.
Supply of Control Panels for electric pumps.
Generator Set, Includes Transfer Panel.

DESCRIPTIVE MEMORY
 Technical Report: "Improvement of the Potable Water and Sewage System of the City of"
Juanjui

DRAINAGE PUMPING CHAMBER CBD-02

Construction of Shelter and Caisson (Civil Works)

Hydraulic equipment for suction and discharge pipes.
Electrical installations and automation for (Lighting, outlets and
Force)
Supply of submersible pump for wastewater Qb=33 l/s,
31.00m
Supply of Control Panels for electric pumps.
Generator Set, Includes Transfer Panel.

DRAINAGE PUMPING LINE OF CBD-01

SUM/INST. PVC-UF PIPE NTP ISO 4422 C-7.5 DN 315, L=927.00ml

DRAINAGE PUMP LINE OF CBD-02

SUM/INSTALLATION PVC-UF PIPE NTP ISO 4422 C-7.5 DN 315, L=2135.00m

HOUSEHOLD SEWAGE CONNECTIONS

Expansion of 279 household sewage connections.

Renewal of 1792 household sewer connections.

WASTEWATER TREATMENT SYSTEM

01 grid chamber and sand trap.

income structures
output structures
04 primary facultative lagoons
04 maturation lagoons.
distribution and interconnection system
outlet line of effluent for final disposal

Electrification of general drainage works.

Medium voltage electrification of the CBD-01

Medium voltage electrification of the CBD-02

Installation of Latrines for Villa Prado

Construction of 105 pit latrines.

Environmental Mitigation

The Executing Company will be responsible for ensuring that the recommendations are met.
environmental aspects of the study.

DESCRIPTIVE MEMORANDUM
Technical File: "Improvement of the Drinking Water and Sanitation System of the City of
Juanjui

The most critical social impact will occur in the urban area, driven by
the excavations for the installation of networks, causing the uplift of
dust and vehicular congestion, especially from the so-called mototaxis and the
pedestrian circulation, recommending that work be done during off-peak hours.
trafficability, if possible in the early hours of the morning.

The environmental program includes the conservation of the landscape, seeking

mitigate the negative impacts that occur in the area of interest and that are indicated
inside the study

UNOSA will systematically develop an information plan.

permanent public, that reaches all levels, especially of the inhabitants
who live near the catchment area and facilities of the plant
treatment, with the aim of preserving the area so as not to affect the quality of
water.

Consider and develop a permanent monitoring plan regarding quality

from the water source, the same one that will be managed by UNOSA.
The execution time will be 24 months, the cost is indicated in the budget of
project.

DESCRIPTIVE MEMORANDUM
Technical File: "Improvement of the Potable Water and Sewage System of the City of Juanjui"

DESCRIPTIVE MEMOIR
Technical Report: "Improvement of the Potable Water and Sewage System of the City of Juanjui"

SOCIAL INTERVENTION

Health Education

Health education is the process of teaching-learning, through which

healthy hygiene practices are promoted to protect health, preventing
diseases; as well as the proper and sustainable assessment and use of services
sanitation; services that encompass the supply of safe water; to the
sanitary disposal of excreta and wastewater with or without sewage
sanitary, to the rainwater management and its treatment; and to the management, treatment and to the
final disposal of solid waste.

Basic sanitation services include the provision of safe water;

the sanitary disposal of excreta and wastewater with or without sewage
sanitary, to the management and its treatment; and to the management, treatment and final disposal of
solid waste.

In order for health education to contribute to water systems,

sanitation and solid waste management must operate sustainably, it must be
articulated with the promotion of citizen participation.
So that environmental education allows us to identify problems that occur in the
various areas of the environment, it must be transversal. That is, it should be present in all
educational action, promoting organization and, in general, throughout the
technical and social intervention.

This health education program to be implemented aims to instill standards and

habits, creating civic awareness in the population, with the aim of providing management
suitable for water and to conveniently have control over the waters
residuals, from the enclosure of Juanjui, La Merced, Juanjuicillo, La Victoria, Santa Rosa
and Villa Prado, reaching health education to schools, markets and
institutes

Institutional Strengthening

Training for the personnel of the operation and maintenance service system
potable water is essential for the development and proper functioning of the
drinking water and sewage systems

It is important for the Entity to include operation programs &

maintenance of drinking water systems, sewerage and treatment
wastewater.

The technical and operational personnel in charge of the drinking water systems,
sewerage and wastewater treatment will be trained through
technical update talks and training to learn about the new
systems that will be managed by the service provider entity of
sanitation.

Likewise, this component includes the acquisition of equipment and/or

necessary tools for the operation and maintenance of the systems.

DESCRIPTIVE MEMORANDUM
Technical File: "Improvement of the Potable Water and Sewage System of the City of Juanjui"

Awareness of fee payment

The development of the awareness campaign will consider different tools.

of communication and public relations, such as advertisements on television, radio and
print media that emphasize specific actions on the importance of the
water for life, as well as awareness workshops for paying the fee.

Improvement of the Potable Water and Sewerage System of the City of Juanjui

Costs - Social Intervention

Can't. Can't. Price Total Value

Item Description And.
Unit Description Unit price S/ S/.
I HEALTH EDUCATION 92,000.00
1 Personal Professional and Technical months 1.00 8.00 8,000.00 64,000.00
2 Health Education Workshops Unit 1.00 8.00 1,500.00 12,000.00
3 Diffusion Unit 1.00 8.00 1,000.00 8,000.00
4 Third Party Services mess 1.00 8.00 1,000.00 8,000.00

II INSTITUTIONAL STRENGTHENING 96,000.00

1 Training of technical personnel Glb. 1.00 8:00 4,500.00 36,000.00
2 Acquisition of Equipment Kit 1.00 1.00 40,000.00 40,000.00
3 Acquisition of Tools Kit 1.00 1.00 20,000.00 20,000.00

III AWARENESS OF FARE PAYMENT 28,000.00

1 Awareness Workshops Unid 1.00 8.00 1,500.00 12,000.00
2 Diffusion Unit 1.00 8:00 1,000.00 8,000.00
3 Third Party Services months 1.00 8:00 1,000.00 8,000.00

Total Costs S/. 216,000.00

DESCRIPTIVE MEMOIR
Technical File: "Improvement of the Potable Water and Sewage System of the City of Juanjui"

X. FINANCING

The financing will be handled by the sources available to the Regional Government of
San Martín (GRSM).

XI. PROJECT BUDGET

PROJECT BUDGET

IMPROVEMENT OFTHE DRINKING WATERAND SEWAGE SYSTEM IN THE CITYOFJUANJUI

Code Cost S/.

001 TEMPORARY WORKS AND PRELIMINARY WORK FOR THE ENTIRE WORK 523,218.14
002 EXISTING WELL PE-01 (EQUIPMENT AND SHED) - MAINTENANCE 161,363.68
003 EXISTING WELL PE-02 IMPROVEMENT (INCLUDES EQUIPMENT AND HUT) - SANTA ROSA 341,241.95
004 SUPPORTED RESERVOIR RP-01 VOL=2500M3 1,168,268.23
005 SUPPORTING RESERVOIR RP-02 VOL=150M3 152,849.31
006 PROJECTED DRINKING WATER TREATMENT PLANT PTAP-02 2,275,017.91
007 IMPROVEMENT AND OPTIMIZATION OF THE EXISTING POTABLE WATER TREATMENT PLANT PTAP-01 1,066,004.63
008 CAISSON TYPE CAPTURE 1,586,424.07
009 IMPROVEMENT OF THE EXISTING SUPPORTED RESERVOIR RE-01 VOL= 600M3 100,768.96
010 Improvement of the existing supported reservoir RE-02 VOL=500M3 75,069.57
011 PUMP LINE FROM RP-01 TO RP-02 27,140.59
012 PUMPING LINE FROM PE-01 TO RE-01 73,736.26
013 PUMPING LINE OF CAISSON 01 TO PTAP-02 480,184.91
014 ADDUCTION LINES AND DISTRIBUTION NETWORKS 6,497,488.74
015 Sewer Networks 2,693,015.02
016 DRAINAGE PUMPING CHAMBER CBD-01 726,131.18
017 DRAINAGE PUMPING CHAMBER CBD-02 577,818.92
018 Household Connections for Drinking Water 3,084,670.44
019 Household Drain Connections 1,881,230.34
020 DRAINAGE PUMPING LINE OF CBD-01 163,059.47
021 DRAINAGE PUMPING LINE OF CBD-02 357,892.40
022 WASTEWATER TREATMENT SYSTEM 5,793,913.46
023 MICROMEDITION 958,903.05
024 MITIGATION 129,857.90
025 TOILETS 98,191.46
026 MAIN COLLECTORS AND INTERCEPTOR 1,679,161.16
027 ELECTRICAL INSTALLATIONS, AUTOMATION AND MEDIUM VOLTAGE 1,378,051.00
------------------------
DIRECT COST 34,050,672.75
GENERAL EXPENSES 15% 5,107,600.91
UTILITY 10% 3,405,067.28
------------------------
SUBTOTAL 42,563,340.94
IGV 18% 7,661,401.37
============
COSTOFWORK 50,224,742.31
ConstructionSupervision 3,744,807.42
SOCIALINTERVENTION 216,000.00
EnvironmentalMitigation 353,400.00
LEGALPHYSICALSANITATION 1,662,309.97
=============
TOTALCOSTOFTHE PROJECT 56,201,259.70

The Total Cost of the Project is FIFTY-SIX MILLION TWO HUNDRED ONE THOUSAND TWO HUNDRED
Fifty-nine with 70/100 new soles (S/. 56,201,259.70).

DESCRIPTIVE MEMORY
Technical File: 'Improvement of the Drinking Water and Sewerage System of the City of Juanjui'

XII. TIME OF CONSTRUCTION WORK

The time required for the work will be 720 calendar days.

XIII. CONTENT OF THE PROJECT

This file contains:

Descriptive Memory.
2. Calculation Memory.
3. Measurement Sheet.
4. Budget
5. General Expenses.
6. Execution Schedule and Disbursement Schedule
7. Technical specifications.
8. Operation and Maintenance Manual.
9. Annexes:
Annex No. 01: Topographic study.
Annex No. 02: Soil Mechanics Study.
Annex No. 03: Sources Study.
Annex No. 04: Geology and Geotechnics
Annex No. 05: Hydrology and Hydraulics Study
Annex No. 06: Evaluation of Existing Infrastructure.
Annex No. 07: CIRA.
Annex No. 08: Environmental Impact Study.
Annex No. 09: Characterization of the Waters
Annex No. 10: Quotations
Annex No. 11: Catalogs.
Annex No. 12: Crossed Documents.

DESCRIPTIVE MEMORY