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 San Juan-Chama Project 
 Engineering Data

San Juan-Chama Project  -  Main Page

Facilities in Operation

Storage Dams

2       

Diversion Dams

3       

Canals

37.9 mi  

Laterals

mi  


Storage Facilities

Diversion Facilities

Blanco Diversion Dam

Little Oso Diversion Dam

Oso Diversion Dam

Carriage Facilities

Blanco Tunnel

Location

From theRio Blanco southerly to the Little Navajo River.

Construction period

1965-1969  

Length

8.64 mi  

Cross section: 

Circular

   Diameter  

103 in  

   Capacity

520 cfs  

   Unreinforced concrete lining:

6.5 in  


Oso Tunnel

Location

From the Little Navajo River southeasterly to the Navajo River.

Construction period

1966-1970  

Length

5.05 mi  

Cross section:

Circular

   Diameter

103 in  

   Capacity

550 cfs  

   Unreinforced concrete lining:

6.5 in  


Azotea Tunnel

Location

From Navajo River southeasterly and under the Continental Divide to Azotea Creek.

Construction period

1964-1970  

Length

12.8 mi  

Cross section:

Circular

   Diameter

131 in  

   Capacity

950 cfs  

   Unreinforced concrete lining:

8 in  


Little Oso Siphon

Type:

Precast concrete pipe

Location

Between the Blanco and Oso Tunnels - carries water under the Little Navajo River.

Construction period

1966-1970  

Length

345 ft  

Diameter

96 in  

Capacity

550 cfs  


Azotea Creek and Willow Creek Conveyance Channels

Type:

Open channel with three baffled concrete drop structures.

Location

Southwest of Chama, New Mexico on Azotea Creek between outlet of Axontea Tunnel and confluence of Willow Creek and along Willow Creek to the head of Heron Reservoir.

Construction period

 

Length

11 mi  

Width

28-65 ft  

Side slopes

2:1  

 

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