Question $3(100$ Marks$)$

a$.\text{'}$As constructed' plans, documents and files are supplied to local government authorities upon completion of civil works for land development. Discuss the typical survey requirements for

undertaking $\text{'}$as constructed surveys' $($during the course of construction$)$ including, $($i$)$ method and checks $(15$ marks$),($ii$)$ accuracies $(15$ marks$)$ and $($iii$)$ the necessary relevant $\text{'}$as$-$constructed' capture feature requirements $(30$ marks$)$ for a sewage line in an urban subdivision, for provision for a typical local authority. $(60$ marks total$)$

b$.$ It is proposed to intersect two grade lines to construct pedestrian$/$cycle way over a river. The distance between the Points $2$ and $3$ is $300$ m and the grade reduced levels are as follows: Point $2=$

$$

$2$

$98\mathrm{.}000$ m $,$ Point $3=95\mathrm{.}000m.$ The first grade is to be calculated from a Point $1$ at a reduced level of $95\mathrm{.}500m,250$ metres behind Point $2.$ The second grade is to be calculated from a Point $4$ at a reduced level of $91\mathrm{.}500m,150$ metres beyond Point $3.$

$($i$)$ Calculate the grades to intersect Points $1$ and $2$ with Points $3$ and $4,$ the reduced level of the intersection point, the distances of the intersection point from Points $2$ and $3.$ Confirm and check the accuracy of your calculations, document all working and answers. $(30$ marks$)$

$($ii$)$ Calculate the length of vertical curve based upon an allowable rate of change of $0\mathrm{.}5\%$ per $20$ m of length and nominate a proposed length of vertical curve based upon an even $20$ m interval. $(10$ marks$)(40$ marks total$)$

Need to do Part $($b$)$