Members of Wyndham Park Forum have said they hope to see the new paddling pool ready by July 25, in time for the school holidays.
Members of the public were asked to choose from a number of designs last year and picked the design for a pool with a splash pad play area.
Members of the Forum were told this week that at least four companies had tendered for the contract to install the pool in the Grantham park.
Forum chairman John Knowles said: “We need to be sure the pool is absolutely ready. If it is not ready by then, the public will be very upset.”
If the pool is completed in time it will be ready for the 90th anniversary celebrations which are to be held on Sunday, July 27. The celebrations will feature sports and games which were popular when the park opened in 1924, as well as a band playing tunes popular 90 years ago.