Tributes have been paid to the two teenagers, with Tonibeth, from Barmston, Washington, being hailed as a hero.
Friends of the pair have been laying flowers on the riverbank and paying their respects.
Amy Bell, 13, said: "I knew Chloe, she was a fantastic girl and she did not deserve this at all."
Joss Richards, 13, who was in the same school class as Tonibeth, said: "I'm really devastated that she has gone."
One card left with flowers said: "RIP Tonibeth you are a hero."
Another left for Chloe said: "Heaven has gained a beautiful angel who will be greatly missed."
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Duncan Jones tweeted: "1 month since dad died today. Made this card for him at Christmas. Due in June. Circle of life. Love you, granddad."
More than 10 days after his body was found, Richard Cole's family claim they are still in the dark over the circumstances of his death.
A cold and frosty start, then staying largely dry with plenty of sunshine.