The above description comprises only work to be done in connection with the present project or first stage of the general plan. More detailed descriptions of the principal structures are given later.
The above description comprises only work to be done in connection with the present project or first stage of the general plan. More detailed descriptions of the principal structures are given later.
The general plan comprises also the bringing of water into the new Hemlock Reservoir from (1) Calabogue Creek - Second stage, and (2) Cohocton River, Third stage, as subsequently described.
Data relative to drainage areas, storage and yield, both for the present project and the Second and Third stages of the general plan, are given in connection with the discussion of the Second and Third stages.
The location of the additional areas which would be made tributary to the Hemlock system are shown cross-sectioned on Figure 2. These include Calabogue Creek, Cohocton River Livonia Creek and other areas naturally tributary to Hemlock Outlet north of the present Hemlock Lake. Approximate locations of diversion conduits are shown by dotted lines.
Calabogue Creek lies west of Hemlock Lake and is naturally tributary to Conesus Lake. Its drainage basin contains an abandoned fingerlake bed, similar to that of Hemlock and Canadice Lakes but at a sufficiently high elevation so that water from this stream can be brought into the lower Hemlock basin by a gravity diversion conduit, which would convey the water into Livonia Creek drainage basin, from which it would flow naturally into the basin of the Hemlock Reservoir. A storage dam would be constructed on rock foundation at the north end of the Calabogue diversion area.
Aside from the main diversion area f 9.38 square miles on Calabogue Creek there are three additional small areas lying west of the Hemlock drainage basin, designated C-1, C-2 and C-3 on Fig. 2, from which water could be diverted into the Calabogue diversion conduit.
The head-waters of Cohocton River lie immediately south of the head-waters of the Springwater Creek, the main tributary of Hemlock Lake. A small reservoir would be constructed on Cohocton River at a suitable elevation so that the water could be diverted by gravity into Springwater Creek north of Wayland.
There is an additional small area from which water could be diverted into the supply conduit. This is designated "B" on Fig. 2.
In case of all these diversions a sufficient quantity of water would be released at all times during low water periods to provide for domestic and agricultural uses.
A stream having a drainage area of 2.20 square miles and forming the head-water tributary of Springwater Creek has at some time past been diverted from its natural course at a point just north of Wayland and is now tributary to Canaseraga Creek. Restoration of this stream to its natural course would be included in connection with the project.
If developed and extended in the manner described, the Hemlock supply system would be capable of providing a dependable yield of at least 50 mgd as compared with the present supply of 31 mgd.
The principal items and structures involved in the general plan are:
1. Restoration of Conduit I north of Overflow No. 1 (now in progress). 2. Provision of increased capacity to deliver water from Overflow No. 1 to the City, either by relining Conduit II or by construction of a new conduit to supplement Conduits II and III. Consideration of this item is deferred pending restoration of Conduit I.
3. Reconstruction of Canadice Lake dam and the construction of a new low-level outlet therefrom.
4. Construction of a new dam near Hemlock village and of the Lower Basin Reservoir.
5. Raising present Hemlock Lake dam to serve as a partition wall between the upper and lower basins of the new Hemlock Reservoir and construction of by-pass from Gatehouse No. 2 to the Lower Basin Reservoir.
6. Construction of new gatehouse at the new Hemlock dam and new main supply conduit therefrom to Overflow No. 1.
7. Calabogue diversion. (Second stage.)
8. Cohocton diversion. (Third stage,)
The different steps or stages would be constructed about in the order named and in the manner as:
1. To provide a progressively increasing supply of water in the Hemlock system and increased ability to deliver water to the City.
2. To provide an adequate water supply during the war period and at the same time defer as much as possible of the construction until the war is over and permit it to be carried out as part of the post-war program.
Structures are planned in such a manner as to require the minimum use of metals and essential war materials in parts of the program which must be constructed during the war.
P> The general plan comprises also the bringing of water into the new Hemlock Reservoir from (1) Calabogue Creek - Second stage, and (2) Cohocton River, Third stage, as subsequently described.Data relative to drainage areas, storage and yield, both for the present project and the Second and Third stages of the general plan, are given in connection with the discussion of the Second and Third stages.
The location of the additional areas which would be made tributary to the Hemlock system are shown cross-sectioned on Figure 2. These include Calabogue Creek, Cohocton River Livonia Creek and other areas naturally tributary to Hemlock Outlet north of the present Hemlock Lake. Approximate locations of diversion conduits are shown by dotted lines.
Calabogue Creek lies west of Hemlock Lake and is naturally tributary to Conesus Lake. Its drainage basin contains an abandoned fingerlake bed, similar to that of Hemlock and Canadice Lakes but at a sufficiently high elevation so that water from this stream can be brought into the lower Hemlock basin by a gravity diversion conduit, which would convey the water into Livonia Creek drainage basin, from which it would flow naturally into the basin of the Hemlock Reservoir. A storage dam would be constructed on rock foundation at the north end of the Calabogue diversion area.
Aside from the main diversion area f 9.38 square miles on Calabogue Creek there are three additional small areas lying west of the Hemlock drainage basin, designated C-1, C-2 and C-3 on Fig. 2, from which water could be diverted into the Calabogue diversion conduit.
The head-waters of Cohocton River lie immediately south of the head-waters of the Springwater Creek, the main tributary of Hemlock Lake. A small reservoir would be constructed on Cohocton River at a suitable elevation so that the water could be diverted by gravity into Springwater Creek north of Wayland.
There is an additional small area from which water could be diverted into the supply conduit. This is designated "B" on Fig. 2.
In case of all these diversions a sufficient quantity of water would be released at all times during low water periods to provide for domestic and agricultural uses.
A stream having a drainage area of 2.20 square miles and forming the head-water tributary of Springwater Creek has at some time past been diverted from its natural course at a point just north of Wayland and is now tributary to Canaseraga Creek. Restoration of this stream to its natural course would be included in connection with the project.
If developed and extended in the manner described, the Hemlock supply system would be capable of providing a dependable yield of at least 50 mgd as compared with the present supply of 31 mgd.
The principal items and structures involved in the general plan are:
1. Restoration of Conduit I north of Overflow No. 1 (now in progress). 2. Provision of increased capacity to deliver water from Overflow No. 1 to the City, either by relining Conduit II or by construction of a new conduit to supplement Conduits II and III. Consideration of this item is deferred pending restoration of Conduit I.
3. Reconstruction of Canadice Lake dam and the construction of a new low-level outlet therefrom.
4. Construction of a new dam near Hemlock village and of the Lower Basin Reservoir.
5. Raising present Hemlock Lake dam to serve as a partition wall between the upper and lower basins of the new Hemlock Reservoir and construction of by-pass from Gatehouse No. 2 to the Lower Basin Reservoir.
6. Construction of new gatehouse at the new Hemlock dam and new main supply conduit therefrom to Overflow No. 1.
7. Calabogue diversion. (Second stage.)
8. Cohocton diversion. (Third stage,)
The different steps or stages would be constructed about in the order named and in the manner as:
1. To provide a progressively increasing supply of water in the Hemlock system and increased ability to deliver water to the City.
2. To provide an adequate water supply during the war period and at the same time defer as much as possible of the construction until the war is over and permit it to be carried out as part of the post-war program.
Structures are planned in such a manner as to require the minimum use of metals and essential war materials in parts of the program which must be constructed during the war.