Littlerock Dam and Reservoir
Summary
TLDRThe Little Rock Dam, constructed in 1924 and renovated in 1994, is a crucial water storage facility for the growing community of Little Rock. Engineered by John Eastwood, it was once the largest multiple arch dam, standing 124 feet high and 576 feet wide. Controversies in 1932 revolved around the spillway design, especially after the St. Francis dam failure. Sediment removal is vital for maintaining water storage capacity, crucial during droughts, but is complicated by the presence of the endangered Diorio toad in the watershed area. The dam's reservoir is replenished by natural runoff and rainfall, with water transferred to Lake Palmdale for treatment and distribution.
Takeaways
- đïž The Little Rock dam was constructed in 1924 and was the largest multiple arch dam at that time.
- đ· John Eastwood, a renowned engineer in the Western Region, was responsible for the dam's construction.
- đ The dam's design was innovative, featuring a 124 feet high and 576 feet wide multiple arch structure, which was new to the area.
- đŠ The dam's primary purpose was for water storage to meet the needs of a growing community.
- đš In 1932, controversy arose over the dam's spillway design and function, following the St. Francis dam failure.
- đ The Little Rock dam was renovated in 1994 to increase the reservoir's storage capacity by removing sediment.
- đ Sediment removal is crucial for maintaining water storage capacity, as accumulated dirt can limit the dam's ability to hold water.
- đ§ïž The dam and reservoir are replenished by natural runoff from snow packs and rainfall in the local mountains.
- đž The Diorio toad, an endangered species, inhabits the watershed area of the dam, affecting sediment removal operations.
- đ ïž Mitigation efforts are necessary due to the presence of the endangered species to safely remove accumulated sediment.
- đ§ Water from the Little Rock reservoir is transferred to Lake Palmdale and then treated for distribution.
Q & A
What was the primary purpose of constructing the Little Rock dam?
-The Little Rock dam was built primarily for storage to meet the growing community's storage needs.
When was the Little Rock dam constructed and what made it significant at the time?
-The Little Rock dam was constructed in 1924 and was the biggest and tallest multiple arch dam at that time.
Who was the engineer responsible for the construction of the Little Rock dam?
-John Eastwood was the engineer responsible for the construction of the dam, and he was well known in the Western Region for dam construction.
What controversy arose in 1932 regarding the Little Rock dam?
-The controversy in 1932 was mainly about the spillway design and function of the Little Rock dam, following the failure of the St. Francis dam just four years prior.
What was the role of the new state agency in the context of the Little Rock dam?
-The new state agency was overseeing dam safety, which was particularly relevant after the St. Francis dam failure and in the context of the Little Rock dam's spillway design controversy.
When was the Little Rock dam renovated and why?
-The Little Rock dam was renovated in 1994 to increase the storage capacity of the reservoir.
Why is removing sediment from the Little Rock dam important?
-Removing sediment is important because accumulated dirt behind the dam takes the place of water that could be stored, limiting the dam's ability to store water, which is crucial especially after droughts.
What impact did the Diorio toad have on the operation of the Little Rock dam?
-The Diorio toad, an endangered species found in the watershed area of the dam, had a significant impact on the ability to utilize the dam and remove sediment due to the need for mitigation measures.
How is the Little Rock dam and reservoir fed?
-The Little Rock dam and reservoir are fed by natural runoff from snow packs in the local mountains and from rainfall.
What happens to the water after it enters Lake Palmdale?
-After entering Lake Palmdale, the water is transferred to the district's water treatment plant where it is treated for distribution.
What is the significance of water storage in the context of the Little Rock dam?
-Water storage is very important, especially after experiencing droughts, as it ensures a valuable resource for the community and enhances the dam's ability to serve its purpose.
Outlines
đïž Little Rock Dam Construction and Controversy
This paragraph discusses the construction of the Little Rock dam in 1924, which was the largest multiple arch dam at the time. Engineer John Eastwood was responsible for its design, introducing an arch design that was new to the area. The dam's primary purpose was for water storage to meet the needs of a growing community. A significant controversy arose in 1932 regarding the spillway design and function, especially after the St. Francis dam failure and the establishment of a state agency to oversee dam safety.
đ Renovating and Maintaining the Little Rock Dam
The Little Rock dam was renovated in 1994 to increase its storage capacity by removing sediment that had accumulated over the years. Sediment accumulation reduces the dam's ability to store water, which is crucial for the community, especially during droughts. The removal of sediment is essential for maintaining the dam's function as a valuable water resource. However, the presence of the Diorio toad, an endangered species in the watershed area, has complicated sediment removal efforts due to the need for extensive mitigation measures.
đż Watershed and Water Treatment Process
The Little Rock dam and reservoir are fed by natural runoff from snow packs in the local mountains and rainfall. The water is then transferred to Lake Palmdale, where it undergoes treatment at the district's water treatment plant before being distributed. The paragraph highlights the importance of the dam and reservoir in the water supply chain, from natural sources to the final distribution for community use.
Mindmap
Keywords
đĄDam
đĄStorage
đĄMultiple Arch Dam
đĄEngineer
đĄSpillway
đĄState Agency
đĄSediment
đĄEndangered Species
đĄWatershed
đĄRunoff
đĄWater Treatment Plant
Highlights
The dam was built primarily for storage to meet the growing community's needs.
Little Rock dam, constructed in 1924, was the biggest tallest multiple arch dam at that time.
John Eastwood, a well-known engineer in the Western Region, was responsible for the dam's construction.
The arch design of the dam was new and controversial to the local area.
Controversy in 1932 was mainly due to the spillway design and function, following the St. Francis dam failure.
A new state agency was overseeing dam safety, adding to the controversy.
Little Rock dam was renovated in 1994 to increase the storage capacity of the reservoir.
Removing sediment from the dam is crucial for maintaining its water storage capacity.
Water storage is vital, especially after experiencing droughts.
The Diorio toad, an endangered species, was found in the watershed area, impacting dam utilization.
Mitigation efforts were required to remove accumulated sediment due to the presence of the endangered species.
Little Rock dam and reservoir are fed by natural runoff from snow packs and rainfall.
Water from the reservoir is transferred into Lake Palmdale for treatment and distribution.
The dam's maintenance and sediment removal are essential for the community's water supply.
The dam's history and renovation highlight the importance of water resource management.
The presence of an endangered species adds a layer of complexity to dam management.
The dam's design and function have evolved over time to meet changing needs.
Transcripts
[Music]
the dam was built primarily for storage
and to meet the storage needs of a
growing community Little Rock dam being
constructed in 1924 it was at that time
the biggest tallest multiple arch dam
constructed the engineer at the time was
John Eastwood who was well known in the
Western Regional for dam construction at
that time when they did it was a
multiple arch dam 124 feet high 576 feet
wide unproven so the arch design was
something new to most people in the area
the controversy over Little Rock dam in
1932 had mostly to do with the spillway
design and function just four years
before that the st. Francis dam had
failed and a new state agency was
overseeing dam safety Little Rock dam
was originally built in 1924 and was
renovated to increase the storage
capacity of the reservoir in 1994
removing the sediment from Little Rock
dam is an important part of really
maintaining a valuable resource for us
that dam is there to hold water and when
you have you know hundred you know
thousands of acre feet of just dirt
accumulated behind that dam that takes
the place of the water that could be
there and limits our ability to store
water and having water storage is very
important especially we know this
especially after going through a dirt a
drought so being able to store more
water there after remove the sediment
will be very very valuable Diorio toad
was found in the watershed area of
Little Rock dam and it's an endangered
species and so that had a big impact on
our ability to utilize that dam a
particular remove sediment from it
because over years you know water coming
down and bringing dirt
along with it builds up behind the dam
but because there was a an endangered
species there there we've had to go
through a lot of mitigation or to get
ready to remove that accumulated dirt
that is behind the dam Little Rock dam
and reservoir is fed by natural runoff
from snow packs in the local mountains
and from rainfall the water is then
transferred from Little Rock reservoir
into Lake Palmdale after entering Lake
Palmdale this water is treated at the
district's water treatment plant for
distribution
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