Environmental Impact Assessment
Senior 6 · Entrepreneurship
Environmental Impact Assessment
Lesson 4 of 4
25 min
In March 2026 Ngoma District, working with the Ministry of Education (MINEDUC), published an updated environmental and social management plan for building 26 additional classrooms and 48 latrines at 15 school sites, under the Rwanda Quality Basic Education (QBE) project. All the work was planned inside existing school compounds, on land owned by the government or by faith-based organisations, so no land had to be bought and nobody had to move. Because these schools had already been through an environmental and social impact assessment, the district updated the existing management plan rather than starting a new full study.
The plan is a real example of what this lesson is about: the report that an assessment produces, and in particular the management plan that turns promises into tasks with a budget and a person responsible.
An EIA report is written by the licensed expert and submitted to RDB. Its parts follow the stages of the assessment. The right-hand column shows how Ngoma District's plan covers each one.
| Component | What it contains | In the Ngoma District plan |
|---|---|---|
| Executive summary | The main findings, impacts and measures in plain language, for decision-makers and the public | Summarises the project, the thresholds and why an update was enough |
| Project description | What, where, how big, what activities in each phase (construction, operation, closure) | Site preparation, earthworks, foundations, roofing, latrines, retaining walls, clean-up |
| Baseline | The environment before the project: physical, biological and socio-economic | Hydrology, climate, soils, plants and animals, population, farming, water, electricity, education |
| Alternatives | Other sites, designs, materials and methods, including the "no-project" option | Sites, designs, materials, water supply, waste management, keeping schools running during works |
| Policy, legal and institutional framework | The laws that apply and the institutions involved | MINEDUC, Ministry of Environment, REMA, RDB, Rwanda Housing Authority, the district and others |
| Impacts | Positive and negative impacts, their size and significance | Jobs and less overcrowding; dust, noise, waste, water use, safety |
| Mitigation and management plan (EMP) | Each measure with its cost, timing and who is responsible | A table of impacts, measures, budgets in Frw and responsibilities |
| Monitoring plan | What will be measured, how often and by whom, to check the measures work | For example, dust suppression checked daily |
| Public consultation | Who was consulted, what they said and how the project responded | A chapter on the stakeholders consulted and the process |
Definition
Baseline study: a description of the environment and the community as they are BEFORE a project begins, against which its later impacts are predicted and measured.
Example: measuring the stream's water quality and counting the households that draw water from it before the washing station is built.
Definition
No-project alternative: the option of not carrying out the project at all, which every EIA must compare with the proposal, so that decision-makers can see whether the project's benefits justify its impacts.
Example: in Ngoma, not building would avoid dust and noise but leave pupils in overcrowded or unsafe classrooms.
An EIA does not treat every impact as equally serious. A common method scores each negative impact for its magnitude (how big: 1 minor, 2 moderate, 3 major) and its likelihood (how probable: 1 unlikely, 2 possible, 3 likely), and multiplies them:
High-significance impacts must be avoided or reduced before the project can be approved; medium ones need clear measures in the management plan; low ones are monitored. The scores are a structured judgement, not an exact measurement, so the report must explain each one.
Tip
Every row of a management plan answers five questions: WHAT is the impact, WHAT will be done, WHO does it, WHEN, and HOW MUCH it costs. Add a sixth for the monitoring plan: HOW we will know it worked. A measure with no owner and no budget is only a wish.
Worked example 1: scoring and managing the washing station's impacts
Use the matrix to rank four impacts of the Nyamasheke washing station from Lesson 3 and propose a measure for each. (Illustrative scores.)
| Impact | M | L | Score | Rating | Measure (who) |
|---|---|---|---|---|---|
| A. Wastewater reaching the stream | 3 | 3 | 9 | High | Recirculate washing water; treat the rest in lagoons away from the stream (cooperative) |
| C. Pulp heap by the road | 2 | 2 | 4 | Medium | Compost the pulp and return it to members' farms (cooperative) |
| B. Odour | 1 | 3 | 3 | Medium | Site lagoons downwind of homes; cover them (cooperative, contractor) |
| D. Serious injury to a worker | 3 | 1 | 3 | Medium | Guards on the pulper; training; first-aid kit (manager) |
Reasoning: A scores , the highest, so it must be solved before approval. D is unlikely but major, so it scores the same as B, which is likely but minor: significance weighs both size and probability.
Worked example 2: reading a real management plan
Three rows of Ngoma District's plan, summarised (budgets in Frw, as given in the plan):
| Impact | Management measures | Budget | Responsible |
|---|---|---|---|
| Water pollution during construction | Cover exposed soil, build temporary silt traps, provide adequate separate toilets for male and female workers | 2,250,000 | MINEDUC, district, schools |
| Conflict over water | Coordinate water use with local authorities and WASAC, schedule building water use, reuse water and harvest rainwater, train workers | 1,500,000 | MINEDUC, WASAC, district, schools |
| Damage to cultural heritage | Survey the sites for sacred or historic places before building starts | 300,000 | MINEDUC, with the heritage authorities |
(a) Total budget of these three rows: francs.
(b) Why several bodies share responsibility: each measure needs someone with the power to act. The water utility controls supply, the district knows local users, and the schools are on site every day.
(c) What makes these rows useful: each names a specific measure, a cost that can be budgeted and an owner who can be held to account at the environmental audit.
Warning
A weak report lists impacts and stops. Examiners (and RDB's reviewers) look for the measures, their costs and their owners, and for evidence that the people affected were consulted. Also, never skip the positive impacts, the alternatives or the baseline: without a baseline nobody can later prove whether the project made things better or worse.
Practice
Further reading
Sources and credits
Written by Ganzaa: the significance matrix, the washing-station scores, the tables, the worked examples and the practice items. The washing station, the bakery and their scores and costs are illustrative (2026).
