US 301 Stream Restoration

Purpose: Restore a 1,600 foot stream that had been eroded from increased stormwater runoff after the construction of the weigh station on Highway 301, resulting in 30 ft deep cuts in what once was a natural stream.

Project: A series of rock stepped pools, followed by regenerative bioretention beds slow and infiltrate storm flow, thereby reducing the erosive energy as it moves downstream. This creates a cleaner and more docile stream entering the Sassafras. Additionally, eroded outer meander bends of the stream that had become sharp hairpin turns due to the increased flow of strormwater were relocated and stabilized. Cross veins and veins were constructed along the stream to redirect flow to the natural channel in areas where the stream had been cutting into the surrounding banks and to maximize riffle, run and pool habitat and biodiversity.

 Bioretention measures will also be installed upstream of the restoration in order to filter and infiltrate excessive stormwater originating from the highway and weigh station. Runoff source control measures including concrete swale removal, bioswales with stepping check dams, rock step pools, and regenerative bioretention conveyances are proposed along Route 301 in the median and right of way, and at the tributary headwater areas.

Cost: $880,000 funded by Maryland DNR, Maryland State Highway Administration, and the Natural Resource Conservation Service

Pollution Reductions: 35 lbs of nitrogen, 465 lbs of phosphorus, and 105 tons of sediment annually. 

Worton Wetland and TREEmendous Habitat Creation

15,000 Native Plants, 1.27 Acres of Wetlands, 2,671 Square Foot Rain Garden, Immeasurable Impact.

Purpose: Remove nutrient and sediment pollution from Rileys Mill Creek and create wetland habitat.

Project: ShoreRivers installed a 1.27-acre wetland in Worton Park Recreational Area, Kent County, that filters non-point source pollution from 120.2 acres of public park and agricultural land situated at the headwaters of Riley’s Mill Stream, an impaired tributary to the Chester River. The project is a partnership between ShoreRivers, Partnerships for Ecological Restoration, Kent County High School, Kent County, and the Maryland Department of Natural Resources. The wetland is located on county-owned land and drains 120.2 acres comprised mainly of turf grass and ball fields with minimal acreage of paved surfaces and agricultural. The wetland is located in Kent County’s largest public park with Kent County High School immediately adjacent, providing lasting educational and enjoyment opportunities for students and park-users. In addition, the Worton Park wetland project complements the 10 acres of trees and shrubs planted in 2014-2015 in the Park and the adjacent Kent County High School property using DNR Stream Restoration funding. Together, the tree planting and wetland installation will reduce non-point source nutrient and sediment pollution to local waters, create native habitat, beautify the school and park, and serve as a demonstration project for students and park-users.

The Worton Park Wetland finished well under budget. ShoreRivers received an approved modification request to reallocate funds to a new project – the Church Hill Elementary School (CHES) Bioretention Area. During the summer of 2017, ShoreRivers constructed a 2,671 square foot bioretention area and completed the associated grading that provides stormwater treatment for a 3.42 acre drainage area that is 20.9% impervious area. Additionally, the bioretention area provides valuable habitat and educational opportunities for the school and community.    

Pollution Reductions: 153 lbs of Nitrogen, 11 lbs of Phosphorus, and 1345 lbs of sediment annually.