Answer: Concrete Mixers by Patricia Hubbell
The drivers are washing the concrete mixers;
Like elephant tenders they hose them down.
Tough gray-skinned monsters standing ponderous,
Elephant-bellied and elephant-nosed,
Standing in muck up to their wheel-caps,
Like rows of elephants, tail trunk.
Their drivers perch on their backs like mahouts,
Sending the sprays of water up.
They rid the trunk-like trough of concrete,
Direct the spray to the bulging sides,
Turn and start the monsters moving.
Concrete mixers
Movie like elephants
Bellow like elephants
Spray like elephants,
Concrete mixers are urban elephants,
Their trunks are raising a city.
Step-by-step explanation: