Simplify the following text for a Grade 12 native English-speaking person.
Original: Unusually , some of the temporary track was wider than the final gauge - the section around Parracombe Bank for example , spanning the Heddon valley , was built to gauge , with a locomotive known as Winnie .
Simplified: Unusually , some of the temporary track was wider than the final gauge - the section around Parracombe Bank for example , crossing the Heddon valley , was built to gauge , with an engine known as Winnie .