PLEASE ANSWER WITH THE DRAWN PLANS AND MATH, NOT A LIST OF INSTRUCTIONS. I NEED TO SEE THE WORK DONE.

This exercise will familiarize you with how to design and calculate swales for drainage around flat areas such as building pads. Design a horseshoe swale $($two swales from a single high point$)$ around the building pad shown on the following diagram. Show all graphic work on plan. Show additional calculations on extra sheets of $812$ x $11$ paper $($not trace$).$ Only clear and legible work will be graded

Assume the following conditions:

a$)$ Longitudinal slope of left swale is minimum of $3\%$; longitudinal slope of left swale is

minimum of $2\%.$

b$)$ Maximum slope is $4$:$1.$

c$)$ Slope away from building pad is minimum of $2\%$ for first $5$ feet.

d$)$ SHP $($the cross to the upper left of building pad$)$ is a minimum slope of $2\%$ measured

diagonally.

e$)$ Scale is $1=20($The drawing should be to scale, but if not, rescale it before doing work.$)$

Instructions:

$1.$ Spot Elevations correctly noted at all given spots $(0\mathrm{.}5$ points each, total $7$ points$)$

$2.$ Curb cuts $($BOC$/$TOC$)$ noted correctly to both ends of the curb cut $(0\mathrm{.}2$ points$)$

$3.$ Swale noted with correct line type and arrows $(0\mathrm{.}2$ points$)$

$4.$ Swale centerline located correctly, at even gradient, and within slope limitations $(2\%-$

$10\%)(0\mathrm{.}4$ points$)$

$5.$ Drain structures are noted correctly $($label and rim elevation$)(0\mathrm{.}2$ points$)$

$6.$ Desired trees preserved $($no grading within the drip lines$)(0\mathrm{.}2$ points$)$

$7.$ All contour lines are accurate $(4$ points$)$

$8.$ All contour lines are labeled accurately $($tick marks, index and elevations provided$)(0\mathrm{.}5$

points$)$

$9.$ Grading within site boundaries $(0\mathrm{.}2$ points$)$

$10.$ Lettering well organized and legible $(0\mathrm{.}2$ points$)$

$11.$ Correct north arrow and scale included $(0\mathrm{.}2$ points$)$

$12.$ Appropriate line types used for existing and proposed contours $(0\mathrm{.}2$ points$)13.$ Title Block, titles$/$subtitles appropriate and well$-$drawn $(0\mathrm{.}2$ points$)$

$14.$ Professional presentation $($good layout, clean$-$neat$-$blemish free$)(0\mathrm{.}2$ points$)1$ EXERCISE $11$b: SITE GRADING AND DRAINAGE FOR SINGLE STRUCTURE SCALE: $1^{\text{'}\text{'}}={20}^{\text{'}}$