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HYDRO24786
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HYDRO24786
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Last modified
8/24/2016 8:44:44 PM
Creation date
11/20/2007 5:01:08 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1979195
IBM Index Class Name
Hydrology
Doc Date
6/15/2001
Doc Name
TEMPORARY SUBSTITUTE SUPPLY PLAN SUBURBAN SAND AND GRAVEL ROAD RUNNERS REST II GRAVEL PIT MLRB PN M-
From
ENVIRONMENT INC
To
DWR
Media Type
D
Archive
No
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~ENVI~RONMEN T, INC. • <br />SUBURBAN $AND AND GRAVEL, CO <br />TEMPORARY BUPPLY PLAN <br />JUNE 1 5, 2001 <br />• PARE 2 <br />the size of the surface area is fairly constant due to the uneven nature of <br />the mine floor. <br />We used 25.0 acres as the lake surface area and based our net lake <br />surface evaporation on this amount. As before we have taken 69.77 acres of <br />dry up credit for the grass hay crop historically grown on the site. But <br />during analysis of the water available, we found that the Burlington Ditch <br />shares would provide a minimum of 64.03 ac-ft. Using a 65~ efficiency factor <br />suggested by Gary Witt of Wright Water Engineers, the amount is reduced to <br />41.62 ac-ft of water in a dry year. This number is used in the TSSP to <br />offset lake evaporative losses during the growing season. In this case the <br />Blaney-Griddle analysis shows only that the grass hay requires more water <br />than the ditch water can provide. This field has been removed as mining <br />progresses, freeing the ditch water for use in the TSSP. <br />Approximately 75.00 acres ± has been mined, that will be reservoir area, <br />any water that falls on this excavated area is channelled to the dewaterinq <br />pit and pumped to the river. This area was originally covered by the <br />irrigated field and native vegetation that has now been removed so there is <br />little or no vegetation present. Any precipitation that falls on the <br />excavated area goes directly to the pumps and is returned to the system <br />without being used by vegetation. To calculate the net lake evaporation the <br />total mined area (75 ac.) was multiplied by the adjusted annual precipitation <br />from Table C Column 5 to determine the amount of water needed for lake <br />evaporation from the proposed lake area (25 ac.). This is shown in Table A <br />Column 2. ' <br />I have also attached copies of the most recent (1994 to 2000) diversion <br />records for the Burlington Ditch so the division has the last 30 years of <br />diversion records. This will bring those records current for your file. The <br />precipitation that falls on the entire stripped area flows into the water <br />area so credit was claimed from that area to offset the impacts evaporation <br />will have. <br />The tables attached show the monthly distribution of historic losses, <br />and future losses, and an exhibit showing Blaney-Griddle method of calculat- <br />ing consumptive uses by crops. <br />TABLE A, BALANCE FOR DRY UP -VS- ACTUAL LOSSES FROM LAKE AREA ON <br />DISTURBED AREA, is the most important, it is the final accounting table <br />showing the amount of makeup water we need to supply on a monthly basis. It <br />takes the final numbers found in Tabla B and Tablo F, to find the impact the <br />operation will have on the system. Based on the amount of water available <br />from the ditch there is adequate water available to meet the evaporation <br />losses from the 25.00 acre s+/- lake. Review will show water is available <br />for as many as 361 days each year. The same distribution percentages from <br />Guideline }'6 was used to calculate the amount of ditch water available for <br />makeup. <br />TABLE H, MONTHLY WATER LOSS RECAP FOR GRAVEL OPERATION, recaps the loss <br />and credit calculations done in TABLE C and TABLE D. It serves to show the <br />net amount of water used by the operation before any credits are applied from <br />supplemental water or as a result of crop dry-up. This table will serve as <br />the guide when the monthly reports are filled out. <br />TABLE C, AVERAGE ANNUAL NET LAKE EVAPORATION LOSS, is a table adapted <br />from the CRITERIA requirements. It shows the average annual evaporative loss <br />and average annual precipitation for the Brighton area. This table is used <br />to calculate the net loss on the lake area. <br />
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