PROBLEM: $($Refer to sketch #$1)$

GIVEN:

Influent Elevation of M$.$H$.$ A$-1={139\mathrm{.}20}^{\text{'}}$

Effluent Elevation of M$.$H$.$ A$-2=146\mathrm{.}60$

Influent Elevation of M$.$H$.$ A$-2={146\mathrm{.}90}^{\text{'}}$

Effluent Elevation of M$.$H$.$ A$-3={147\mathrm{.}72}^{\text{'}}$

Bottom of M$.$H$.$ diameters $={4\mathrm{.}00}^{\text{'}}$

Standard distance from batterboards to invert is as follows:

$M.H.A-1toA-2={10\mathrm{.}00}^{\text{'}}$

$M.H.A-2toA-3={10\mathrm{.}00}^{\text{'}}$

Hub offset is ${8\mathrm{.}00}^{\text{'}}$ for M$.$H$.$ A$-1$ to A$-2$ and ${10\mathrm{.}00}^{\text{'}}$ for M$.$H$.$ A$-2$ to A$-3.$ The

length of the batterboards is ${10\mathrm{.}00}^{\text{'}}.$

PROBLEM:

Complete the attached set of surveying notes for sewer line construction

staking.

a$.$ Draw the plan of the sewer line on engineering paper at a scale of

$1^{\text{'}\text{'}}={40\mathrm{.}00}^{\text{'}}.$

b$.$ Indicate the manholes, the centerline of the sewer line, the location of the

hubs, the batterboards and the stations. Note the hub offsets and the

stations at each point.