Rio Grande
23 Colorado mutual ditch and reservoir companies in the Rio Grande basin, listed alphabetically.
- Billings Ditch Company — Alamosa
- Capulin Ditch Company — Sanford
- Carmel Drainage Ditch Users Association — Alamosa
- Centennial Irrigating Ditch Company — Alamosa
- Cerro Ditch Company — Chama
- Commonwealth Irrigation Company — Alamosa
- Excelsior Ditch Company — Monte Vista
- Hickory Jackson Ditch Company — Alamosa
- La Garita Reservoir Company — South Fork
- Los Sauces Ditch Company — Sanford
- Meadow Glen Ditch LLC — Del Norte
- Montez Ditch Acequia, Inc. — San Luis
- New Cenicero Ditch Company Corp. — Antonito
- Prairie Ditch Company (The) (Water) — Mosca
- Rio Grande And Piedra Valley Ditch Company — Del Norte
- Rio Grande Ditch No. 1 Company — South Fork
- San Francisco Ditch Company — San Luis
- Sanchez Ditch And Reservoir Company — San Acacio
- Santa Maria Reservoir Company — Monte Vista
- Shaw Reservoir Company — South Fork
- Terrace Irrigation Company — Monte Vista
- Trinchera Irrigation Company — Blanca
- Willow Park Ditch Company — South Fork