Lodan

Item	Description
1. Name of Project	Lodan Dam Sub-Project
2. Location	(1) General Layout is shown in Figure A-1. (2) Project Location and Administration · Province : Central Java · District : Rembang · Sub-district : Sarang 135 km to the east of city of Semarang.
3. Objective	(1) To enhance rice production through water resources development (2) To increase the income of inhabitants in and around the project area (3) To raise the farmers living standard (4) To increase employment opportunity in the area (5) To contribute to the development of the rural socio-economic conditions
4. Type of Development	(1) Rehabilitation of Dam (2) Rehabilitation of right bank main canal (3) New construction of left bank main canal (4) New construction of right bank secondary canals (5) New construction of intake facility for domestic water supply (distribution system already exists).
5. Irrigation Development Area	(1) Whole project area : 380 ha (2) Target area under PTSL-II : 380 ha
6. Water Supply and Water Requirement	(1) Water source: Lodan River (2) Available water supply: as shown in Table A-1 (3) Irrigation water requirement: as shown in table A-2 (4) Design unit water requirement: 2.26 l/sec/ha

B. Contribution of the Project to Water Resources/Irrigation Development

Item

Description

1. Necessity of the project

Entering the 1990s the self-sufficiency of rice in Indonesia is facing a crisis. Rice production is quite abnormal and irregular compared with the 1980s. The average unit yield of rice stands stationary in the 1990s. The expansion of irrigation area lost momentum in the 1990s, and the rice import resumed from 1994. Under such situation, the Government has adopted a policy of food security and sustenance of self-sufficiency in rice production.

The crop intensity of paddy fields in Indonesia is as low as 119% that indicates a possibility to expand the harvested area and thereby to increase the rice production through the irrigation development. In 1999, there was about 2.1 million ha of rain-fed paddy fields and 1.17 million ha of upland paddy fields in Indonesia, for which the irrigated agriculture can be efficiently introduced without major problems such as transmigration, large-scale land development, social infrastructures, etc.

In order to promote the food security and sustenance of self-sufficiency in rice production, the government is keen to implement the irrigation development being effective for rice production, quick yielding and cost effective

The primary objective of PTSL-II is to enhance rice production through water resources development such as irrigation projects or pond/dam projects, contributing to the self-sufficiency of rice in Indonesia.

2. Beneficiary Area

The socio-economic condition of the people in the project area is at the subsistence level due to the limited income from agricultural activities. The basic development constraint is the lack of irrigation water. The present land use is as shown below.

· Rainfed paddy field: 380 ha

· Upland: - ha

In addition, during dry season, many of the villagers in/around the sub-project area have been forced to purchase the water from outside for their living use.

The command area of Lodan Dam Sub-project is already rain-fed sawah. Main canal of Lodan right bank irrigation system is only one existing canal in the system but it was heavily damaged after the breach of the dam.

PTSL-II includes the rehabilitation of dam, improvement of the existing main canal and the new construction of left bank main canal and right bank secondary canals.

With the project implementation, the principal benefit of the project is as follows:

· Increase of cropping intensity from 150% to 250%

· Increase of unit yield of crop by changing from rainfed agricultural land to irrigated land

· Introduction of high value crops

· Stable supply of domestic water of 20 l/sec for 5 hours/day.

C. Project Area

1. Water resources	The irrigation water for Lodan sub-project is once reserved in the proposed Lodan Dam and distributed to the irrigation command area. The average, the maximum, and the minimum discharge (10 days basis) of the Lodan River are estimated to be 0.22 m³/sec, 2.06 m³/sec, and 0.01 m³/sec, respectively. The river discharge is sufficient for the whole Lodan Irrigation area of 382 ha with a cropping pattern of paddy-paddy/polowijo-polowijo and the domestic water supply (20 l/sec for 5 hours/day).
2. Land use	The present land use is as shown below. · Irrigated paddy field: - ha · Rain-fed paddy field: 380 ha Irrigation is not provided because there are no functional irrigation nor the reservoir. Improvement and construction of irrigation system are required. All the sub-project area is already the rainfed farmland, so there is no need of land development. The Sub-project area is cultivated with paddy under rain-fed condition.
3. Institutional set-up	There are 2 (two) water users associations (P3As) in the sub-project area and the formation of new water users associations is required.
4. Environmental issues	· The construction of Lodan Dam was completed in 1996 and there is no specific issue for land acquisition and resettlement of dam site. · Land acquisition for the new irrigation canals is needed. · The command area in which the construction works of secondary canal systems are to be carried out is already rain-fed paddy field therefore the existing flora and fauna have been well adapted to the existing agricultural system. · New EIA has been completed under PTSL-II and the result has shown that there is no major negative environmental impact because there will be no major change in the appearance of landscape, no disturbance on natural habitats, and no loss on historical, cultural and religious sites.

D. Project Scope

	Item	Scope of Work
1.	Rehabilitation of Lodan Dam
	Dam maximum height	26.5 m
	Dam axis length	179.6 m
	Spillway length	181.4 m
	Intake	1 nos
2.	Main Irrigation Canal System
	(1) Rehabilitation of main irrigation canal	1.5 km
	(2) Construction of secondary irrigation canal
	Lodan Kiri Secondary Canal	1.1 km
	Lodan Wetan Secondary Canal	1.7 km
	Lodan Kanan Secondary Canal	5.7 km
	Lodan Wetan 3M Sub-Secondary Canal	0.6 km

	(3) Construction of irrigation canal related structures
	Off-take/division structure	1 nos.
	Culvert	4 nos.
	Bridge	- nos.
	Aqueduct	1 nos.
	Cross drain culvert	2 nos.
	Drop	12 nos.
	Turn out	11 nos.
	End structure	3 nos.
2.	On-farm System
	(1) Tertiary canal system	380 ha

After Public Consultation Meeting, field investigation, and discussion with Dam Safety Unit, the following additional project works are added to the original:

(1) Re-alignment of Upstream Part of the Spillway

Result of Review Design of Lodan Dam has shown that the upstream part of the spillway requires re-alignment. The upstream part is re-aligned toward the right bank where the foundation layer has bearing capacity comparable to rock.

(2) Concrete Frame Slope Protection

Slope protection by means of additional concrete frame is required at right bank to improve stability of right bank.

(3) Blanket

Considering the unforeseeable condition in the foundation because of rather complicated geological condition, the blanket length was extended by 10 to 60 m for safety allowance.

(4) Emergency Outlet

Capacity of emergency outlet was increased by providing the additional outlet pipe.

(5) Rehabilitation of Existing Main Canal

The existing main canal requires normalization and rehabilitation. Major cracks are seen along the existing masonry canal lining. Masonry lining shall be replaced with concrete lining to reduce water loss along the canal. Sediment removal is required to normalize the existing main canal.

(6) Additional Secondary Canals

The construction of 5 new secondary canals is required because there is no existing secondary canal in the system. In addition, the inclusion of additional command area near Pelang Village requires the construction of one aqueduct based on requests from the villagers. The aqueduct is required to supply irrigation water taken from Lodan Wetan Secondary Canal to Pelang over Lodan River.

E. Implementation Schedule

The implementation schedule of the project is presented as follows:

(1) The civil work of the main irrigation and drainage systems will commence in January 2005 and be completed in August 2006 for a construction period of 20 months.

F. Organization and Management Structure

I. Organization for Implementing the Project

Item	Description
1. Executing Agency	Directorate General of Water Resources, Ministry of Settlement and Regional Infrastructure
2. Implementation Management	Implementation of Lodan Dam Sub-project is managed by the sub-project manager of Proyek Air Bersih Jratunseluna (Jratunseluna Raw Water Project).
3. Monitoring and Management	· At the sub-project level, the sub-project manager will monitor and control physical and financial progress of the project work under the guidance of the Project Manager and the Chief of Provincial Water Resources Services. · At the central level, Directorate of Water Resources in Central Region (DWRC) is responsible for monitoring the progress of the project. DWRC will report the progress to Directorate of Technical Guidance (DTG). · DTG will compile the information together with other sub-projects information to prepare the progress report to JBIC. The organization and management structure of the project implementation is as per attached in Figure G-1.
4. Payment Procedure and Monitoring of Financial Progress	· Direct payment is applied to the civil work contractors. · Any payment will be processed with the confirmation of the contents of invoices by the PTSL-II consultant. The flow chart of payment and monitoring procedure for financial progress is as per attached in Figure G-2.

II. Organization of Operation and Maintenance

Appropriate operation and maintenance activities by Water Users’ Associations will be incorporated in O&M of the project through the formation and empowerment of the WUAs on the basis of the Government Regulation of Irrigation Turnover (PKPI).