exhibit 10. 20 execution - february 12, 2002 waste disposal agreement by and between scrubgrass generating company, l. p. and coal valley sales corporation dated as of february 12, 2002 scrubgrass project table of contents article i - definitions 1 article ii - disposal of waste coal and ash 4 2. 1. exclusive right 4 2. 2. annual forecast 4 2. 3. minimum take 4 2. 4 [ reserved ] 5 2. 5. deliveries of ash 5 2. 6. disposal of hazardous substances 5 2. 7. testing, title and environmental reports 5 article iii - handling of waste coal and ash 6 3. 1. transportation 6 3. 2. loading 6 3. 3. monthly and annual schedules 6 3. 4. permits 7 3. 5. handling by scrubgrass 7 3. 6. payment of taxes 8 3. 7. access to the site 8 article iv - deliveries 9 4. 1. waste coal quality ; suspension of deliveries 9 4. 2. inspection of waste coal 9 4. 3. rejection of a delivery 10 4. 4. waste coal sampling and analysis 10 4. 5. weighing and reporting 10 4. 6. title 11 4. 7. indemnification 11 4. 8 demurrage 11 4. 9 road bonding 12 article v – fees 12 5. 1. handling fee 12 5. 2. lien waiver 15 5. 3. offset 15 article vi – term 15 6. 1. basic term 15 6. 2. options to extend 15 article i - definitions article i - definitions 1 1 article ii - disposal of waste coal and ash article ii - disposal of waste coal and ash 4 4 2. 1. 2. 1. exclusive right exclusive right 4 4 2. 2. 2. 2. annual forecast annual forecast 4 4 2. 3. 2. 3. minimum take minimum take 4 4 2. 4 2. 4 [ reserved ] [ reserved ] 5 5 2. 5. 2. 5. deliveries of ash deliveries of ash 5 5 2. 6. 2. 6. disposal of hazardous substances disposal of hazardous substances 5 5 2. 7. 2. 7. testing, title and environmental reports testing, title and environmental reports 5 5 article iii - handling of waste coal and ash article iii - handling of waste coal and ash 6 6 3. 1. 3. 1. transportation transportation 6 6 3. 2. 3. 2. loading loading 6 6 3. 3. 3. 3