300496
But the construction work was of very poor condition , such that when the Royal Engineers resurveyed the route a year later it was unusable , and further public funds were dedicated to fixing and improving it , adding bridges and taking down steep hills .
 Royal Engineers
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Royal Engineers