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A flexible, water-permeable filter basket may be used to collect and remove debris from a sump in a drain-entry structure (e.g., a catch-basin). The filter basket includes a basket floor having a perimeter of substantially the same size and shape as a sump floor, at least one basket sidewall corresp

A flexible, water-permeable filter basket may be used to collect and remove debris from a sump in a drain-entry structure (e.g., a catch-basin). The filter basket includes a basket floor having a perimeter of substantially the same size and shape as a sump floor, at least one basket sidewall corresponding to at least one sump sidewall, and one or more handles collectively affixed to the at least one basket sidewall, the at least one basket sidewall collectively including a resilient frame. The filter basket may be used as a deformable sump insert to collect debris falling into a drain-entry structure for removal without use of a vactor truck.

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1. A deformable sump insert for use with a storm-drain entry structure having an inlet opening, an outlet pipe, and a sump below the outlet pipe, the sump having a sump floor and at least one sump sidewall, the inlet opening being smaller than the sump floor, the sump insert comprising: a flexible,

1. A deformable sump insert for use with a storm-drain entry structure having an inlet opening, an outlet pipe, and a sump below the outlet pipe, the sump having a sump floor and at least one sump sidewall, the inlet opening being smaller than the sump floor, the sump insert comprising: a flexible, water-permeable filter basket positioned in the sump, entirely below the outlet pipe, the basket comprising: a basket floor having a perimeter that is substantially the same size and shape as the sump floor, and that is larger than the inlet opening; andat least one basket sidewall corresponding to the at least one sump sidewall, the at least one basket sidewall being disposed about the perimeter of the basket floor to form an upper basket opening, the at least one basket sidewall collectively including a resilient frame that is positionable along the at least one sump sidewall such that when the basket is positioned in the sump, the basket floor and at least one basket sidewall are positioned to collect debris falling through the upper basket opening; andone or more handles collectively affixed to the at least one basket sidewall and engageable by a capture device inserted through the inlet opening such that when drawn out of the sump by the capture device, the resilient frame flexes to facilitate removal of the basket through the inlet opening while substantially containing the collected debris within the basket floor and the at least one basket sidewall. 2. The sump insert of claim 1, wherein the filter basket further comprises a replaceable filter liner removably positioned to cover the basket floor. 3. The sump insert of claim 2, wherein the replaceable filter liner is constructed, at least in part, from a nonwoven geotextile fabric. 4. The sump insert of claim 2, wherein the basket floor and the at least one basket sidewall are constructed, at least in part, from an open weave, vinyl-encapsulated mesh fabric. 5. The sump insert of claim 1, wherein the basket floor and the at least one basket sidewall are constructed, at least in part, from a nonwoven geotextile fabric. 6. The sump insert of claim 1, wherein the sump has four sump sidewalls and the basket has four basket sidewalls, the four basket sidewalls respectively comprising four resilient members that collectively make up at least a portion of the resilient frame. 7. The sump insert of claim 6, wherein the basket floor is constructed, at least in part, from a fabric that is water-permeable and durable and has a high tensile strength and low elasticity, and wherein the four basket sidewalls are respectively constructed from four folded portions of the fabric. 8. The sump insert of claim 7, wherein the four resilient members are respectively disposed within four creases corresponding respectively to the four folded portions of the fabric. 9. The sump insert of claim 6, wherein the basket floor measures approximately 22 inches wide by 26 inches long. 10. The sump insert of claim 6, further comprising four flexible reinforcing members respectively reinforcing four sidewall joints at which pairs of the four basket sidewalls meet. 11. The sump insert of claim 10, wherein the one or more handles are collectively affixed to the four basket sidewalls via the four flexible reinforcing members. 12. The sump insert of claim 1, further comprising a float affixed to the one or more handles to facilitate engagement of the capture device with the one or more handles when the basket is submerged in water when positioned in the sump. 13. The sump insert of claim 12, wherein the float fastens together the one or more handles near their respective center portions. 14. The sump insert of claim 1, wherein the one or more handles comprise a pair of ropes. 15. The sump insert of claim 14, wherein the at least one basket sidewall includes a plurality of through-hole attachment points, through which the pair of ropes are affixed to the at least one basket sidewall. 16. The sump insert of claim 1, further comprising the capture device. 17. The sump maintenance system of claim 16, wherein the capture device comprises a pole-mounted hook. 18. The sump insert of claim 1, wherein an interior area of the basket floor is configured as a shallow, flexible concavity with respect to the upper basket opening.