Clinton Lake Clinton Lake SedimentationSedimentation

Earl LewisEarl Lewis

Kansas Water OfficeKansas Water Office

History of Clinton LakeHistory of Clinton Lake

Multipurpose operation - November 30, Multipurpose operation - November 30, 19771977

Authorized by Flood Control Act of 1962 Authorized by Flood Control Act of 1962 Water supply storage included at request Water supply storage included at request

of State of Kansas under 1958 Water of State of Kansas under 1958 Water Supply Act - 89,200 AFSupply Act - 89,200 AF

U.S. Fish & Wildlife requested storage for U.S. Fish & Wildlife requested storage for low flow augmentation - 21,200 AF low flow augmentation - 21,200 AF

Sediment AllocationSediment Allocation

Original 100 year sediment allocation 28,500 AF, Original 100 year sediment allocation 28,500 AF, or 285 AF/yearor 285 AF/year

Sediment allocation Sediment allocation 19,000 AF - conservation pool 19,000 AF - conservation pool 9,500 - flood control pool9,500 - flood control pool

1991 Corps survey showed 296 Af/yr loss in 1991 Corps survey showed 296 Af/yr loss in conservation poolconservation pool

Virtually no loss in flood poolVirtually no loss in flood pool

Yield AnalysisYield Analysis

Water Marketing Act requires that Kansas Water Marketing Act requires that Kansas Water Office be able to deliver water Water Office be able to deliver water through a drought having a 2% chance of through a drought having a 2% chance of recurrence in any one yearrecurrence in any one year

By regulation, defined as a repeat of the By regulation, defined as a repeat of the 1952-1957 drought period1952-1957 drought period

Yield AnalysisYield Analysis

Major factors in yield analysisMajor factors in yield analysis InflowInflow EvaporationEvaporation Sedimentation (storage available)Sedimentation (storage available) Downstream senior water right holdersDownstream senior water right holders Low flow releasesLow flow releases

2004 Yield Analysis2004 Yield Analysis

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1990 2000 2010 2020 2030 2040 2050

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Yield Contracts

Water QualityWater Quality

Kansas Biological Survey report that Kansas Biological Survey report that indicates flats developed by siltation indicates flats developed by siltation causing additional algae blooms and water causing additional algae blooms and water quality concerns.quality concerns.

During low flow periods decomposition of During low flow periods decomposition of the algae blooms cause taste and odor the algae blooms cause taste and odor problems.problems.

Potential Ways to Potential Ways to Deal with SedimentDeal with Sediment

Reduce sediment load coming into lakeReduce sediment load coming into lake Raise conservation pool level to offset Raise conservation pool level to offset

uneven sediment distributionuneven sediment distribution Dredge sediment in lakeDredge sediment in lake

Clinton Lake WatershedClinton Lake Watershed

Watershed Restoration and Watershed Restoration and Protection StrategyProtection Strategy

Developed by a committee of local stakeholders, Developed by a committee of local stakeholders, sponsored by the Kaw Valley Heritage Alliancesponsored by the Kaw Valley Heritage Alliance

City of Lawrence, county conservation districts, City of Lawrence, county conservation districts, the Natural Resources and Conservation Service, the Natural Resources and Conservation Service, K-State Extension, Health and Environment, and K-State Extension, Health and Environment, and the Biological Surveythe Biological Survey

Recommendations to reduce sediment and Recommendations to reduce sediment and associated pollution from both agricultural and associated pollution from both agricultural and urban sources urban sources

Watershed Restoration and Watershed Restoration and Protection StrategyProtection Strategy

Current activity is development of a plan to Current activity is development of a plan to identify and restore eroding stream banks identify and restore eroding stream banks in the Deer Creek watershedin the Deer Creek watershed

Stream bank restoration will reduce Stream bank restoration will reduce sedimentation into the lake sedimentation into the lake

Storage ReallocationStorage Reallocation

State contract with Corps requires storage State contract with Corps requires storage reallocation if sediment distribution reallocation if sediment distribution incorrectincorrect

Move flood to conservation storageMove flood to conservation storage Reallocation costs approx. $1,000,000Reallocation costs approx. $1,000,000 Plus mitigation costsPlus mitigation costs Currently underway at John RedmondCurrently underway at John Redmond

Kansas Water Authority Lake Kansas Water Authority Lake Restoration PolicyRestoration Policy

Approved November 2004Approved November 2004 Conduct small lake dredging projectConduct small lake dredging project Review El Dorado and Oologah studiesReview El Dorado and Oologah studies Develop predictive model for determining Develop predictive model for determining

the occurrence and duration of algal the occurrence and duration of algal blooms blooms

Clean Drinking Water Fee should be used Clean Drinking Water Fee should be used as one funding source for restoration as one funding source for restoration projects projects

DredgingDredging

South Dakota small lakes program - $5,600/AFSouth Dakota small lakes program - $5,600/AF

At 296 AF/year loss - $1.66 million/year to keep At 296 AF/year loss - $1.66 million/year to keep upup

SummarySummary

Clinton Lake conservation pool is silting in Clinton Lake conservation pool is silting in 36% faster than anticipated.36% faster than anticipated.

Clinton Lake as a whole is silting in only Clinton Lake as a whole is silting in only 11 AF/year faster than projected.11 AF/year faster than projected.

Reallocation under the federal contracts Reallocation under the federal contracts will keep design water supply capacity will keep design water supply capacity whole through the year 2073.whole through the year 2073.

SummarySummary

First action - reduce sediment load into lakeFirst action - reduce sediment load into lake City of Lawrence should continue and City of Lawrence should continue and

increase WRAPs effortsincrease WRAPs efforts Dredging potentially solves both quality and Dredging potentially solves both quality and

quantity issuesquantity issues Dredging is more expensive than other Dredging is more expensive than other

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