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~•;•: HYDROLOGY REPORT
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<br />4.~ C. ..
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<br />' "°"`~' µ'•k4^The portion of this site lying westerly of the Burlington
<br />•~°~. -~5 Northern Railroad, is almost entirely within the 100 yr.
<br />.,ry. ` .
<br />~° ~"''':~:";, ,flood plain of Boulder Creek.
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<br />:;:'?~' "v~k-~l3ue primarily to the elevated grade of the Railroad track,
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<br />~„ °•, :`the portion lying northerly and easterly of the track is
<br />f.~~;,~;~j¢protected by the railroad's roadbed, except for the far
<br />;.~; west BO acres, adjacent to the creek.
<br />PRC~~,:The main flood way lies along the westerly edge of the
<br />' `;`,; property. 'Phe flood waters entering this site from the
<br />`'~ south, will not be changed historically by the project.
<br />~°x~~' The flood plain in this area is 3,600' to 5,000' in width,
<br />- :with this area, the flood water will only reach a depth
<br />., of 1' to 1.5', with velocities of less than 1 foot per
<br />"LL second.
<br />~t~;,~;:".Errosion will be minimal, but some sedimentation to the
<br />!r~t,'.'•-~-'~-agricultural land may ~~ccur.
<br />,~,,, The storage potential of 430 A%-F'T. in the 6 lakes will
<br />'~ help during minor storms but will have little effect on
<br />4rx~._majo:r floods. By increasing or decreasing historic rates
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<br />`~'~ because the areas where waters from the lakes will exist
<br />;_"$r during flooding are the same areas where water would
<br />.~norm~slly channel if the lakes were not present_
<br />">•~` •fihe natural overflow of these onds will be in locations
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<br />~; ~„.~ ..where the flood would normally be and therefore, the
<br />'" ' ,;z•~` ~'` "-pattern of flood flows will not be changed and the
<br />^'<- velority will not be changed.
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<br />` ~-,T~. Western Paving is aware that during flood conditions,
<br />r • ?'A?'~=' ~' the uts ma• be com letel inundated and must remove
<br />"" ~x all equipment from the pit or risk damage. No equipment,
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<br />~e:~~_:~~ structures, piles, fuel or portable toilets will be
<br />~-~; allowed in the floodway, that cannot be readily removed
<br />. ~,•,.
<br />'~° so as to prevent downstream damage.
<br />LAKE LEVELS
<br />The :lake levels as shown on the reclamation plan, are a
<br />normal maximum elevation.
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