Design Guide for Community Water Systems - The Water, Sanitation ...

a. Hydrological data, stream flow, and weather records;b. Safe yield design as described in section 3.1. of this document;c. The maximum flood flow and the safety features of the spillway anddam, shall be based on the design criteria of the Missouri Dam andReservoir Safety Council, regardless of the height of the dam;d. A description of the watershed, noting any existing or potentialsources of contamination (such as highways, railroads, chemicalfacilities, farming operations, etc.) which may affect water quality, adiscussion of land use practices, and provisions for erosion andsiltation control structures;e. Summarized quality of the raw water, with special reference tofluctuations in quality, changing meteorological conditions, etc.; andf. Source water protection issues or measures that need to be consideredor implemented.1.1.6.2. Ground water sourcesa. Consolidated formation groundwater is generally available in verylarge quantities in southern and central Missouri and withdrawal is notregulated. However, large withdrawals may reduce the volumeavailable in localized areas. The purpose of the hydrogeologic report isto provide information to the public water supply so that rationaldecisions can be made on location of wells, the possible civil liabilityof de-watering neighbors, and the practicality of expandinggroundwater withdrawal from an ever widening circle versusswitching to surface or alluvial sources;b. The department shall be consulted prior to design and constructionregarding a proposed well location as it relates to required separationbetween existing and potential sources of contamination andgroundwater development. The engineering report shall include-1. A legal description of sites under consideration;2. Advantages of the selected site;3. Elevations with respect to surroundings;4. Probable character of formations through which the source is tobe developed;5. Geologic conditions affecting the site; for example, any existingsinkholes, caves, test holes, abandoned wells, or anticipatedinterference between proposed and existing wells. Thisinformation can be obtained from the department's GeologicalSurvey and Resource Assessment Division. Water supplieswhich withdraw or propose to withdraw 2,000,000 gallons perday (2 MGD) or more from wells in consolidated formationsand public water supplies that are contiguous with other publicsupplies which together withdraw or propose to withdraw2,000,000 gallons per day (2 MGD) or more from wells inconsolidated formation, should submit a hydrogeologic reportbearing the seal of a geologist registered in Missouri for eachconsolidated formation well project;Aug. 29, 2003Page 4