Although many 2-way valves are made in which the flow can go in either direction between the two ports, when a valve is placed into a certain application, flow is often expected to go from one certain port on the upstream side of the valve, to the other port on the downstream side.

Since 1960, when the big pumps at the head of the California Aqueduct in the Delta began their operation, the outflow of fresh water into the Pacific has been reduced to a trickle leaving the fish confused as to where to go, resulting in many generations dying off because they have not been able to find their way upstream.

As many as 50 to 80 horses were employed to haul trains of five to seven craft upstream.

Going upstream was more difficult since there were many places where the current was too swift to paddle.

Lumbering was the predominant industry in the St. Croix River Valley in the second half of the 19th century, and for many years logs were sent down the St. Croix, collected at the St. Croix Boom Site two miles upstream of Stillwater, and processed in Stillwater's many sawmills.

Approximately the southern quarter of the township and a very small northeast corner drain into the Lackawanna River, with the rest of the watershed trending west eventually into the Susquehanna River many miles upstream from the confluence of the two.

From the Mill Pool and its weir, the river can be followed upstream through Grantchester meadows to the village of Grantchester and Byron's Pool, where it is fed by many streams.

Prior to European settlement, the Sammamish River Valley from Lake Washington to Issaquah Creek south and upstream of Lake Sammamish was inhabited by a population of as many as 200 native Americans known as the Sammamish.

Because of poor logging practices in the upstream watershed, the historically silty Salween has become many times as turbid as its natural state.

Ural River is also important for many fish species of the Caspian Sea which visit its delta and migrate upstream for spawning.

Sand extraction activities have been prohibited and many upstream cities installed modern sewage treatment plants.

They also gave unfavourable descriptions regarding any potential settlement due to many mud flats upstream and the sand bar ( the sand bar wasn't removed until the 1890s when C. Y. O ' Connor built Fremantle harbour ).

When there are many applications simultaneously requesting downloads, this data creates a congestion point at an upstream provider by flooding the queue much faster than it can be emptied.

The Mormons also made many attempts to construct dams on the river to provide irrigation water — as far upstream as the confluence of the river's forks and as far downstream as below Grand Falls — but most of them failed because of the Little Colorado's fickle variations in discharge.

There was considerable controversy when the dam was planned because it would flood many houses and orchards upstream at Cromwell, as well as the scenic Cromwell Gorge, which was a highlight of the then young but growing New Zealand tourism industry.

The river's powerful current and many rapids make upstream travel nearly impossible.

Water is lost to evaporation, to seepage, and in the many ephemeral wetland systems, with the result that downstream flows are typically smaller than upstream flows.

There are many reservoirs created by damming the Yadkin and Pee Dee rivers within the bounds of North Carolina, and are listed from upstream to downstream:

These are the only soils in all of Australia with reasonable levels of soluble phosphorus, with the result that upstream from Singleton very rich pasture land with many Thoroughbred horse studs occurs.

Further upstream on the Skógá river there are many other spectacular falls.

As a result of the dams blocking the river, salmon populations in the Spokane plummeted, leading to complaints from many of the people living upstream.

The opening of the Thames and Severn Canal from Lechlade in 1789 led to the building of many of the locks upstream of Shiplake.

They are huge areas which have been swept by winds for so many centuries that there is no soil left, but only deep bare ridges fifty or sixty yards apart with ravines between them thirty or forty feet deep and the only thing that moves is a scuttling layer of sand.

`` You know, this hits in many areas.

Still, we must remember that we cannot construct and justify generalizations of this sort unless we are ready to consider many special instances of influence moving between such areas as theology, philosophy, political thought, and literature.

In addition, there are many areas of the human situation besides the impact of science and technology which are examined, for science-fiction dystopias often extrapolate political, social, economic tendencies only indirectly related to science and technology.

But in so many other areas we still are dragging.

In the last few years the telephone company has managed to automate many areas of their service.

Our complaint is that in many crucial areas the Kennedy programs are not too large but too small, most seriously in regard to the conventional arms build-up and in aid and welfare measures.

Thanks for continuing to capture the attention and uncover so many areas of need in this amazing world.

These data are not of the precision obtainable by the methods previously mentioned, but the vast number of approximate values available will be useful in many areas.

There should be a regular electrical outlet in the shelter as power may continue in many areas.

The extent of such interference -- which may be so slight as to be undetectable at any point where either of the stations renders a usable signal, or may be so great as to virtually destroy the service areas of both stations -- depends on many factors, among the principal ones being the distance between the stations, their respective radiated power, and, of particular significance here, the time of day.

Microscopically, there were many areas of hypercellularity alternating with areas of hypocellularity.

One should keep in mind that many of the exciting possiblities of roleplaying are largely unexplored and have not been used in industry to the extent that they have been in military and other areas.

Less ambitious freeway plans may be more successful -- especially when the roadways and interchanges are raised, allowing for cross access at many points and providing parking areas below the ramp.

However, the proposed correlation of the many interrelated properties of crystals will reveal discrepancies in the recorded data and suggest areas for reinvestigation.

Because agricultural activities are seasonal and the areas of production and harvest of many foods are widely scattered geographically, and because of the high cost of transporting bulk food items any substantial distance to a central processing location, the use of large central processing stations, where low-cost radiation facilities approaching the megawatt range might be utilized, is inherently impracticable.

It is not often realized to what degree certain trades are in many communities closed areas of employment, except for a lucky few.

Hardly a window has been broken since Dunbar first was opened ( and vandalism in schools is a major problem in many slum areas ).

Studies of membership trends, even in some areas where population is expanding, show that numbers of churches have had little net increase, though many new members were received.

The Rockies have many `` Aspencades '', which are organized tours of the aspen areas with frequent stops at vantage points for viewing the golden panoramas.

In many areas drivers have established alternate tracks to avoid the worst parts of the surface, although careful attention must be paid to the presence or absence of landmine warning markers by the side of the road.

The most sensitive, and in many ways the most crucial areas, along the Mississippi River and in western Tennessee along the Tennessee River and the Cumberland River were placed under the command of Maj. Gen. Leonidas Polk and Brig.

The two large families are cosmopolitan, with many of their species found in the northern hemisphere, and the smaller families are usually confined to Australia and the adjacent areas, or sometimes South America.

Alpine festivals vary from country to country and often include the display of local costumes such as dirndl and trachten, the playing of Alpenhorns, wrestling matches, some pagan traditions such as Walpurgis Night, and in many areas Carnival is celebrated before Lent.