Geist Reservoir

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Geist Reservoir
Aerial view of Geist Reservoir and surrounding housing developments in Indianapolis suburb of Fishers, Indiana.jpg
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Geist Reservoir
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Geist Reservoir
Location Indianapolis / Fishers, Indiana
Coordinates 39°55′37″N85°57′36″W / 39.927°N 85.96°W / 39.927; -85.96
Type Reservoir
Primary inflows Fall Creek
Primary outflows Fall Creek
Basin  countriesUnited States
Surface area1,890 acres (7.6 km2)
Water volume6,100,000,000 US gal (0.023 km3)

Geist Reservoir is a reservoir in the northeastern part of metropolitan Indianapolis, Indiana, United States. It was constructed in 1943 by damming Fall Creek to provide water for Indianapolis. Upon completion, Geist Reservoir was the second-largest man-made lake in Indiana, providing approximately 6,900,000,000 US gallons (2.6×1010 L; 5.7×109 imp gal) of water. The reservoir is located primarily in the northeast corner of Indianapolis and the southeast corner of Fishers, but small parts reach into the nearby towns of Lawrence, Fortville, and McCordsville.

Contents

History

Geist Reservoir was named after Clarence H. Geist, a former owner of the Indianapolis Water Company, who foresaw a deficit in Indianapolis's water supply and envisioned the Geist Reservoir to preemptively address the problem. Planning for the reservoir began as early as 1913, when hydraulic engineers estimated that White River and Fall Creek would not provide enough water for the increasing needs of Indianapolis. Geist gradually bought some 5,000 acres (20 km2) in the Fall Creek Valley in the 1920s and 1930s, including the small town of Germantown, which today lies at the bottom of the reservoir. Although controversial, the reservoir was completed in 1943, five years after Clarence Geist's death. In the 1960s further controversy arose over plans for commercial and residential development in the area around the lake. A proposal in the 1970s to triple the size of the reservoir was defeated, and a housing boom began in the lake area. [1]

In recent years the Geist area has experienced rapid growth. The area is noted for its topography and the reservoir. In recent years the reservoir has experienced problems with algal blooms and invasive aquatic species. [2] [3]

As the result of a series of sales, the water company and the reservoir are now owned by Citizens Energy Group.

Description

Geist Reservoir Dam is located at the lake's southern end. Fed by Fall Creek on the north, the lake overflow is directed into the creek again at the south. The earthen dam is 40 feet (12 m) high, with an overall length of 1,900 feet (580 m). The reservoir capacity is 60,000 acre-feet (74,000,000 m3), although normal storage is 21,180 acre-feet (26,100,000 m3). The reservoir is mostly rather shallow (10 feet (3.0 m) or less); the depth at the dam is 26 feet (7.9 m) and the maximum depth is 48 feet (15 m). [4]

Geist Reservoir covers 1,900 acres (769 ha) [4] and spans three counties in Indiana (Marion, Hamilton, and Hancock), four voting precincts, three school districts (Lawrence, Hamilton Southeastern, and Mt. Vernon), and features five different ZIP codes (46037, 46256, 46236, 46040, 46055). The area has undergone rapid development and some high-valued homes now line the reservoir's waterfront.

Citizens Reservoir

In 2019, Citizens Energy Group began work to convert a former limestone quarry adjacent to Geist Reservoir into a supplemental reservoir named Citizens Reservoir. Situated near the southern shore of the north end of Geist, the new reservoir covers 88 acres (36 ha) and is 220 feet (67 m) deep. It holds three billion US gallons (1.1×1010 L; 2.5×109 imp gal), equal to almost half the capacity of Geist Reservoir itself. Up to one hundred million US gallons (380,000,000 L; 83,000,000 imp gal) a day can be diverted into Citizens Reservoir when Geist Reservoir is full instead of going over the latter's spillway. When needed, up to thirty million US gallons (110,000,000 L; 25,000,000 imp gal) a day can be pumped from Citizens back into Geist. [5] Construction was completed in 2020, and the reservoir was filled by early 2021. [6]

The limestone quarry was previously owned by Irving Materials Inc. and had operated for 50 years before closing in 2018. Citizens Energy spent over $20 million on the project. [5]

See also

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References

  1. Tocco, Peter. "Geist History". Indianapolis Monthly, 1989. atGeist.com. Archived from the original on October 30, 2013. Retrieved October 23, 2013.
  2. "Blue-Green Algae Update for Geist Reservoir atGeist.com". Britt Interactive, LLC. August 12, 2010. Retrieved November 9, 2013.
  3. "Geist Lake Coalition Steps Up to Treat Reservoir for Milfoil at Geist.com". Britt Interactive, LLC. July 23, 2013. Retrieved November 9, 2013.
  4. 1 2 "Fall Creek Watershed and Geist Reservoir". Center for Earth and Environmental Science - Indiana University ~ Purdue University, Indianapolis. Archived from the original on July 4, 2011. Retrieved October 1, 2019.
  5. 1 2 Russel, John (November 15, 2019). "Indianapolis' next reservoir 'an insurance policy' for dry periods". Indianapolis Business Journal . Retrieved November 16, 2019.
  6. "Citizens Reservoir through the Years" (PDF). Citizens Energy Group. Retrieved May 29, 2022.