Barcode:
1000029

Description:
Laying forms for open lined section of Los Angeles Aqueduct

Subjects:
Men
Construction
Deserts
Rocks

Collection:  Bledsoe Collection 1908-1933

Barcode:
1000031

Description:
Concreting open lined section of Los Angeles Aqueduct

Subjects:
Hills
Men
Construction

Collection:  Bledsoe Collection 1908-1933

Barcode:
1000033

Description:
Concreting open lined section of Los Angeles Aqueduct

Subjects:
Men
Construction
Mules

Collection:  Bledsoe Collection 1908-1933

Barcode:
1000036

Description:
Concreting open lined section of Los Angeles Aqueduct

Subjects:
Men
Construction
Reinforced Concrete Construction

Collection:  Bledsoe Collection 1908-1933

Barcode:
1000037

Description:
Steam shovel - Los Angeles Aqueduct

Subjects:
Construction
Steam Shovels

Collection:  Bledsoe Collection 1908-1933

Barcode:
1000043

Description:
Concreting open lined section of Los Angeles Aqueduct

Subjects:
Mules
Men
Reinforced Concrete Construction
Construction

Collection:  Bledsoe Collection 1908-1933

Barcode:
1000051

Description:
Los Angeles Aqueduct construction - covering lined section of canal

Subjects:
Hills
Men
Canals
Construction

Collection:  Bledsoe Collection 1908-1933

Barcode:
1000286

Photo Date:  January 16, 1918

Description:
Construction of Fairmont Reservoir

The work on the Fairmont Reservoir has been under the direction of the engineer in charge of the construction of the Elizabeth Tunnel. As the lining of the Elizabeth Tunnel is now nearing completion the remaining construction work on the Fairmont Dam and other features of the reservoir have been placed in charge of the division engineer of the Mojave Division.

Briefly stated, it is intended not only as a safeguard in the shape of a storage supply 200 miles from the intake, but also as a means for regulating the hourly fluctuation of water through the power plants located below, to meet peak load conditions. The capacity of the conduit into this reservoir is 420 cubic feet per second, but the outlet tunnel from the reservoir to the power plant has a capacity of 1,000 cubic feet per second. This will permit the discharge of this large volume of water in the few hours of the day during which the maximum demand exists for electric energy, and the decrease of the flow of water to a minimum amount during the night hours when the demand for power is relatively small. The mean discharge from the reservoir during the 24 hours of the day will be approximately 400 cubic feet per second. The excess capacity, above 400 second feet, of 20 cubic feet per second entering the reservoir is to enable the accumulation of water in this reservoir in case it should become necessary to draw it down and afterwards recover the available supply in the reservoir without interfering with the power output.

The capacity of the Fairmont Reservoir at the 3,035 feet elevation is 7,620 acre feet. The dam will have a maximum center height of 115 feet and will contain 607,114 cubic yards. It will be built of earth with a concrete core-wall. The excavation from the northern half of the Elizabeth Tunnel has been put in the outer toes of the dam and amounts to 84,000 cubic yards. The core-wall will be carried up to the full height of the dam. There will be an outlet tower and regulating gates from the reservoir into the north end of the Elizabeth Tunnel. The Fairmont Reservoir will be to the advantage of both the Aqueduct Bureau and the Power Bureau and will be paid for jointly by them on a ratio which has not yet been decided upon.

The Fairmont Tufa Mill is under the direction of the division engineer for the Mojave Division. The building of this mill has cost $26,666. Up to date there has been manufactured a this plant 218,755 barrels of tufa cement, and there is still 100,000 barrels to grind. The saving resulting from the use of the Fairmont tufa cement is 97 cents per barrel. The purpose of this tufa mill has been distinctly one of economy, although the product that has been turned out is as satisfactory as either the Colton, Riverside or Monolith Portland cement. The mill is located on the line of the work about 20 miles from the railroad, and by this regrinding process about 75 cents per barrel has been saved in transportation charges alone.

A very satisfactory practical test has been made of the tufa cement in the building of 6 reinforced concrete siphons with this product. These siphons are 10 feet in diameter with a 9-inch shell, and are built for heads up to 75 feet. All but one of these pipes has been filled with water now for over 6 months, and has with-stood this pressure without leakage or injury. The entire water load apparently is being carried by the concrete and none of it by the reinforcing. Also the Elizabeth Tunnel, which is 26,870 feet long, has been entirely lined with tufa concrete. Some of this ground is very heavy, requiring close timbering with 10 by 10 sets. This concrete lining is satisfactory, and no cracks have been discovered in the entire length of the tunnel.

A characteristic of the tufa cement, when made into standard sand briquettes, is that while it is slow in getting its initial hardness and requires from six to ten days to attain the strength of standard Portland cement, thereafter it continues to grow in strength, and exceeds the straight Portland cement. This hardening process continues for over a year’s time.

Subjects:
Men
Construction
Utility Poles
Water

Collection:  Bledsoe Collection 1908-1933

Barcode:
1000287

Photo Date:  January 16, 1918

Description:
Construction of Fairmont Reservoir

The work on the Fairmont Reservoir has been under the direction of the engineer in charge of the construction of the Elizabeth Tunnel. As the lining of the Elizabeth Tunnel is now nearing completion the remaining construction work on the Fairmont Dam and other features of the reservoir have been placed in charge of the division engineer of the Mojave Division.

Briefly stated, it is intended not only as a safeguard in the shape of a storage supply 200 miles from the intake, but also as a means for regulating the hourly fluctuation of water through the power plants located below, to meet peak load conditions. The capacity of the conduit into this reservoir is 420 cubic feet per second, but the outlet tunnel from the reservoir to the power plant has a capacity of 1,000 cubic feet per second. This will permit the discharge of this large volume of water in the few hours of the day during which the maximum demand exists for electric energy, and the decrease of the flow of water to a minimum amount during the night hours when the demand for power is relatively small. The mean discharge from the reservoir during the 24 hours of the day will be approximately 400 cubic feet per second. The excess capacity, above 400 second feet, of 20 cubic feet per second entering the reservoir is to enable the accumulation of water in this reservoir in case it should become necessary to draw it down and afterwards recover the available supply in the reservoir without interfering with the power output.

The capacity of the Fairmont Reservoir at the 3,035 feet elevation is 7,620 acre feet. The dam will have a maximum center height of 115 feet and will contain 607,114 cubic yards. It will be built of earth with a concrete core-wall. The excavation from the northern half of the Elizabeth Tunnel has been put in the outer toes of the dam and amounts to 84,000 cubic yards. The core-wall will be carried up to the full height of the dam. There will be an outlet tower and regulating gates from the reservoir into the north end of the Elizabeth Tunnel. The Fairmont Reservoir will be to the advantage of both the Aqueduct Bureau and the Power Bureau and will be paid for jointly by them on a ratio which has not yet been decided upon.

The Fairmont Tufa Mill is under the direction of the division engineer for the Mojave Division. The building of this mill has cost $26,666. Up to date there has been manufactured a this plant 218,755 barrels of tufa cement, and there is still 100,000 barrels to grind. The saving resulting from the use of the Fairmont tufa cement is 97 cents per barrel. The purpose of this tufa mill has been distinctly one of economy, although the product that has been turned out is as satisfactory as either the Colton, Riverside or Monolith Portland cement. The mill is located on the line of the work about 20 miles from the railroad, and by this regrinding process about 75 cents per barrel has been saved in transportation charges alone.

A very satisfactory practical test has been made of the tufa cement in the building of 6 reinforced concrete siphons with this product. These siphons are 10 feet in diameter with a 9-inch shell, and are built for heads up to 75 feet. All but one of these pipes has been filled with water now for over 6 months, and has with-stood this pressure without leakage or injury. The entire water load apparently is being carried by the concrete and none of it by the reinforcing. Also the Elizabeth Tunnel, which is 26,870 feet long, has been entirely lined with tufa concrete. Some of this ground is very heavy, requiring close timbering with 10 by 10 sets. This concrete lining is satisfactory, and no cracks have been discovered in the entire length of the tunnel.

A characteristic of the tufa cement, when made into standard sand briquettes, is that while it is slow in getting its initial hardness and requires from six to ten days to attain the strength of standard Portland cement, thereafter it continues to grow in strength, and exceeds the straight Portland cement. This hardening process continues for over a year’s time.

Subjects:
Hills
Buildings
Construction
Utility Poles

Collection:  Bledsoe Collection 1908-1933

Barcode:
1000288

Description:
Construction of Fairmont Reservoir

The work on the Fairmont Reservoir has been under the direction of the engineer in charge of the construction of the Elizabeth Tunnel. As the lining of the Elizabeth Tunnel is now nearing completion the remaining construction work on the Fairmont Dam and other features of the reservoir have been placed in charge of the division engineer of the Mojave Division.

Briefly stated, it is intended not only as a safeguard in the shape of a storage supply 200 miles from the intake, but also as a means for regulating the hourly fluctuation of water through the power plants located below, to meet peak load conditions. The capacity of the conduit into this reservoir is 420 cubic feet per second, but the outlet tunnel from the reservoir to the power plant has a capacity of 1,000 cubic feet per second. This will permit the discharge of this large volume of water in the few hours of the day during which the maximum demand exists for electric energy, and the decrease of the flow of water to a minimum amount during the night hours when the demand for power is relatively small. The mean discharge from the reservoir during the 24 hours of the day will be approximately 400 cubic feet per second. The excess capacity, above 400 second feet, of 20 cubic feet per second entering the reservoir is to enable the accumulation of water in this reservoir in case it should become necessary to draw it down and afterwards recover the available supply in the reservoir without interfering with the power output.

The capacity of the Fairmont Reservoir at the 3,035 feet elevation is 7,620 acre feet. The dam will have a maximum center height of 115 feet and will contain 607,114 cubic yards. It will be built of earth with a concrete core-wall. The excavation from the northern half of the Elizabeth Tunnel has been put in the outer toes of the dam and amounts to 84,000 cubic yards. The core-wall will be carried up to the full height of the dam. There will be an outlet tower and regulating gates from the reservoir into the north end of the Elizabeth Tunnel. The Fairmont Reservoir will be to the advantage of both the Aqueduct Bureau and the Power Bureau and will be paid for jointly by them on a ratio which has not yet been decided upon.

The Fairmont Tufa Mill is under the direction of the division engineer for the Mojave Division. The building of this mill has cost $26,666. Up to date there has been manufactured a this plant 218,755 barrels of tufa cement, and there is still 100,000 barrels to grind. The saving resulting from the use of the Fairmont tufa cement is 97 cents per barrel. The purpose of this tufa mill has been distinctly one of economy, although the product that has been turned out is as satisfactory as either the Colton, Riverside or Monolith Portland cement. The mill is located on the line of the work about 20 miles from the railroad, and by this regrinding process about 75 cents per barrel has been saved in transportation charges alone.

A very satisfactory practical test has been made of the tufa cement in the building of 6 reinforced concrete siphons with this product. These siphons are 10 feet in diameter with a 9-inch shell, and are built for heads up to 75 feet. All but one of these pipes has been filled with water now for over 6 months, and has with-stood this pressure without leakage or injury. The entire water load apparently is being carried by the concrete and none of it by the reinforcing. Also the Elizabeth Tunnel, which is 26,870 feet long, has been entirely lined with tufa concrete. Some of this ground is very heavy, requiring close timbering with 10 by 10 sets. This concrete lining is satisfactory, and no cracks have been discovered in the entire length of the tunnel.

A characteristic of the tufa cement, when made into standard sand briquettes, is that while it is slow in getting its initial hardness and requires from six to ten days to attain the strength of standard Portland cement, thereafter it continues to grow in strength, and exceeds the straight Portland cement. This hardening process continues for over a year’s time.

Subjects:
Steam Shovel
Railroad Cars
Construction

Collection:  Bledsoe Collection 1908-1933