Koteshwar HEP, located approximately 22 km downstream of Tehri Dam, is an integral part of the Tehri Hydro Power Complex (2,400 MW). The project comprises a 97.5 m high concrete gravity dam across the River Bhagirathi and a surface powerhouse equipped with four 100 MW Francis turbine-generator units.
Commissioned during 2011–12, Koteshwar HEP plays an important role in regulating releases from the Tehri Reservoir, maintaining downstream river flows for irrigation and ecological requirements, and supporting the safe flow of water through downstream locations including Devprayag, Rishikesh and Haridwar. Its reservoir also serves as the lower balancing reservoir for the Tehri Pumped Storage Plant (1,000 MW).
SALIENT FEATURES
| Location |
| State | Uttarakhand |
| District | Tehri Garhwal |
| Vicinity | Koteshwar Dam on river Bhagirathi is located near Pendaras Village about 22 Km. downstream of Tehri Dam site. |
| Hydrology |
| Catchments Area | 7,691 sq. km. at dam site |
| Snow catchments | 2,328 sq. km. |
| Design flood | 13,240 cumecs |
| Annual Run off | 8.14 Km3 |
| Annual normal water flow | 258.0 cumecs |
| Storage Reservoir |
| Full Reservoir Level(FRL) | EL. 612.5 m. |
| Maximum Flood Level(MFL) | EL. 615.0 m. |
| Minimum Draw Down Level(MDDL) | EL. 598.5 m. |
| Gross Storage upto FRL | 88.9 MCM. |
| Live Storage Capacity | 35.0 MCM
|
TECHNICAL FEATURES
| Diversion Tunnel |
| Size & Type | 8.0 m. dia. Horse shoe type |
| Length | 593.0 m. |
| Discharge | 1180 cumecs |
| Dam | |
| Type | Concrete Gravity |
| Maximum height above Deepest Foundation Level | 97.5 m.
|
| Elevation of Top of dam | EL 618.5 m. |
| Crest Length | 300.50 |
| Length of non-over-flow section | 196.50 m |
| Spillway |
| Discharge Capacity | |
| at FRL(612.5 m.) | 9,140 cumecs |
| at MFL(615.0 m.) | 13,240 cumecs |
| Number of bays | 4 |
| Bay width | 18 m. |
| Crest Elevation | 594.50 m. |
| Type of Service gates | Radial |
| Size of Gates | 18 m. x 16 m. |
| Power Intake |
| Location | Right Bank integrated into water retaining structure. |
| Intake Sill Level | 582.5 m. |
| Number and size of Penstocks | 4 nos. 6.2 m. dia. |
| Type of service gate | Fixed wheel |
| Power House |
| Type | Surface at toe of dam |
| Location | Right Bank |
| Number of Units | 4 |
| Rated Unit Capacity | 100 MW |
| Installed capacity | 400 MW |
| Type of Turbine | Vertical shaft Francis type |
| Max. head | 75.0 m. |
| Minimum head | 58.0 m. |
| Rated head | 69.0 m |
| Max. Flow through each Unit at rated head | 161 cumecs |
| Switch Yard |
| Type Outdoor on surface | 400 KV |
| Size | 215.5 m x 136 m. |
| Power Generation |
| | |
| Design Energy in 90% dependable year | 1155 MU |
- Peaking Power- 400 MW
- Design Energy-1155MU ( 90% dependable year)
- Regulation of water releases from Tehri Reservoir for irrigation Purposes
- Koteshwar Reservoir will function as the pre requisite lower reservoir for Tehri PSP
Last Updated on 17/8/2026
