Rehabilitation of Lost Creek, Manzanita Creek, East Hat Creek and Forest Creek Water Intake Structures in Lassen Volcanic National Park
Summary
SCH Number
2003038140
Public Agency
Regional Water Quality Control Board, Region 5 (Central Valley), Redding
Document Title
Rehabilitation of Lost Creek, Manzanita Creek, East Hat Creek and Forest Creek Water Intake Structures in Lassen Volcanic National Park
Document Type
NOE - Notice of Exemption
Received
Posted
3/11/2003
Document Description
All four drinking water intakes that are being rehabilitated were built in the 1960's. Each site has a bed of leach rock approximately 15' x 30' x 4' with a concrete filter bed wall designed to slow the water flow over the bed to create a roughing filter effect. These filter beds have a series of under-drains (perforated pipe) under the bed that directs the water to a settling basin and on to the filtration plant. The leach rock was replaced at each site approximately 14 years ago but weekly hand digging of the rock is necessary to release silt build-up before it becomes imbedded in the deeper layers of rock. The infiltration pipes are becoming clogged with silt resulting in lower flow rates to the drinking water filtration plants.
Contact Information
Name
Beth Doolittle-Norby
Agency Name
Regional Water Quality Control Board, Region 5 (Central Valley),
Contact Types
Lead/Public Agency
Phone
Location
Counties
Shasta, Tehama
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Class 2; Sec 15302
Reasons for Exemption
Project entails the rehabilitation of four existing drinking water intake structures.
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