PROJ00540 - Laserfiche WebLink

Home Browse Search

I I I I I I I I I I I I I I I I I I I c. Gardner Sorinqs. The Gardner springs system consists of a buried infiltration pipe, which connects to a 6-foot diameter concrete sump. The facility is located in the alluvial bed of Gurley Canyon, 200 yards south of the headgate. There are two outlet pipelines. One is a 3 inch pressure line, which delivers water to the headgate pipeline, and can only be used by pumping from the spring. The second is a gravity flow line which connects into the infiltration pipeline. 2. Convevance Pioelines. There are two pipelines which convey raw water to the water plant. These are: 1. Reservoir Outlet Pipe. Extends through the reservoir embankment and goes directly to the water plant. 2. Bypass Line around the reservoir. This bypass line carries the combined flows of the spring and infiltration ponds. It connects with the reservoir outlet pipeline below the reservoir. (Note: The pipeline from the headgate on the Gurley Ditch cannot go directly to the water plant through this bypass; it goes only to the reservoir.) 3. Lavout gng Hvdraulic Profile. The layout, slope and elevation of the various pipes will determine which diversions can be used. A schematic drawing of the pipelines which serves the various diversions is shown in Figure III-B. A hydraulic profile of the diversions and pipelines is shown in Figure III-C*. Flow in the reservoir outlet pipe may restrict flow from the bypass or infiltration/spring line due to higher head in the reservoir. It has been reported that when the Town reservoir water surface level was 2.0 feet higher (El. 7434) than now allowed (El. 7432), flow from the bypass pipeline was severely restricted. If a large quantity of flow is in the 6 inch pipe from the infiltration pipeline, gravity flow from the spring is limited, stopped, or experiences flow reversal; infiltration flow then surcharges the spring which then flows out other lines having lower priority rights. In essence, current pipeline connections and water levels in other facilities preclude full use of Gardner Spring unless other sources are shut off. *All elevations were taken off previous design drawings and were not verified in the field. 1II-2