Posts Tagged ‘hillslope’

AWSMP Repairs Damage on Stony Clove Creek

Posted on: January 7th, 2016 by Brent Gotsch

The Ashokan Water­shed Stream Man­age­ment Pro­gram (AWSMP) has com­plet­ed a project to halt bank ero­sion on the Stony Clove Creek near Lanesville.  The chan­nel was restored through a 2,500-foot cor­ri­dor heav­i­ly dam­aged dur­ing Trop­i­cal Storm Irene. Restora­tion of the stream chan­nel cost approx­i­mate­ly $1.5 million.

Dur­ing T.S. Irene, sev­er­al homes were dam­aged by ero­sion and flood­ing, and sed­i­ment accu­mu­lat­ed in the cen­ter of the chan­nel, push­ing stream flows toward the banks.

Stream banks con­tin­ued to retreat in front of three remain­ing homes and sev­er­al large hill­slopes. The rapid­ly slump­ing hill­slopes con­tributed sig­nif­i­cant amounts of fine sed­i­ment to the stream. The sed­i­ments trav­el miles down­stream to the Eso­pus Creek and Ashokan Reservoir.

Engi­neers used a com­bi­na­tion of instream grade and flow con­trol struc­tures designed to mim­ic nat­u­ral­ly occur­ring stream fea­tures to sta­bi­lize the chan­nel and erod­ing stream banks. The chan­nel was engi­neered to pass both low and high stream flows, and the sed­i­ment car­ried by those flows, with­out sig­nif­i­cant­ly eroding.

Kingston Equip­ment Rental, Inc. (Bak­er Broth­ers Exca­vat­ing) out of West Hur­ley built the project. The project was designed by con­sult­ing firm Milone & MacB­room, Inc. The Ulster Coun­ty Soil and Water Con­ser­va­tion Dis­trict (SWCD) pro­vid­ed over­all project management.

In 2016, the Ulster Coun­ty SWCD will work with landown­ers at the project site to tai­lor plant­i­ngs to their prop­er­ties and reveg­e­tate areas scoured dur­ing T.S. Irene. They will also con­tin­ue mon­i­tor­ing the site.

Long-term mon­i­tor­ing wells were installed on a major fail­ing hill­s­lope at the site, and a sep­a­rate phase of restora­tion is being planned for that hill­s­lope in 2016.

The stream restora­tion was fund­ed by the New York City Depart­ment of Envi­ron­men­tal Pro­tec­tion and the Nat­ur­al Resources Con­ser­va­tion Ser­vice Emer­gency Water­shed Pro­tec­tion pro­gram. The Town of Hunter spon­sored the project.

Over the past four years, AWSMP has pro­vid­ed local match to fed­er­al funds to com­plete six stream restora­tion projects total­ing $6.8 mil­lion in the Stony Clove Creek water­shed. The AWSMP is a part­ner­ship between Cor­nell Coop­er­a­tive Exten­sion of Ulster Coun­ty, Ulster Coun­ty SWCD, and New York City Depart­ment of Envi­ron­men­tal Protection.

The AWSMP plans to car­ry out a stream restora­tion project in the Beaver Kill Water­shed in the Town of Wood­stock in 2017.

Stony Clove Creek near Wright Road looking upstream before steam restoration.

Stony Clove Creek near Wright Road look­ing upstream before steam restoration.


Stony Clove Creek near Wright Road looking upstream during steam restoration.

Stony Clove Creek near Wright Road look­ing upstream dur­ing steam restoration.