The Rise and Fall Of,Th Connecticut River
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• ~~r Itarlforb ~OU.r,lnt CONNECTICUT LIVING -~ -- - ~ ~ -' == . ... ..----,._-... ......... -...- ..... -. ... - SECTION = ~ ~ --.-_.. -- ==--:===.===.. - . .- .......... ::---J- '=='.. _-.. - * --== -_. =-_.-== = ===' --=.. ,. === : --=. .: === ==- - -. - . ~ , . ---- ~ ~ . -" ·F - . · _.-- - - .....-- - ---..------.- - ..- - .-.~. ~- - - - · ......... .. .. .- ..... , --.- -. THURSDAY F2 / TELEVISION - -- .- -,-,- · ._._-,--... ... - -_ .. - F6-7/ COMICS - - - APRIL 16,1987 / The rise and fall of,th Connecticut River By SUSANNE DOWDEN dikes, reservoirs, channels, tunnels and wetlands Couratit Staff Writer TAMING THIS MIGHTY WATERWAY that protect homes and businesses. steady rain began to fall the evening And to supplement these controls, a more sophis of March 30, and hydrologists at the ticated warning system is being readied to alert Northeast River Forecast Center in residents of impending floods. Bloomfield knew within a few hours HAS BEEN A ,DIFFICULT CHALLENGE 'Every major flood in the past century has that southern New England was in prompted construction of flood-control structures. trouble. The destruction caused by the 1936 and 1938 floods "We knew it could be a long • • led to the building of 13 large dams along tributar storm," hydrologist Len Mazarowski said. "Tem study rivers and groundwater, could determine England paid off last week as thousands of people ies in the upper river basin by the Army Corps of peratures were above freezing.... With snow-melt roughly how high the Connecticut River would get were protected from the raging waters. Engineers in the 1940s and 1950s. and the probability of rain, we knew there was a and when it was likely to crest, revising their After the 1955 flood caused by two hurricanes, problem Tuesday - the beginning of a flood." forecasts every six hours - and sometimes more A mighty river the corps built three more dams in northwestern frequently. The Connecticut River has been flooding and Connecticut. The center, a division of the National Weather "That was a tremendous flood, one of the worse in Service, immediately began around-the-clock oper- "We're tired," Mazarowski said last week, after destroying lives and property periodically since Connecticut settlers started keeping records in Connecticut history,'! said Michael Coogan, a corps ations, processing information gathered from a more than a week of 12-hour shifts. "Our machines' spokesman. network of electrQnic rain and stream gauges, are near smoke-out, and the people are near burn 1635. The river begins as a stream about a mile l from the Canadian border in New Hampshire and is The 16 corps dams are capable of holding back a volunteer observers and U.S. Army Corps of Engi out." total of 177 billion gallons of water, Coogan said. neers dams throughout New England. fed by dozens of smaller rivers and brooks as it The exhaustive monitoring of the rain and a vast winds for 409 miles through New England. With the constant flow of data, hydrologists, who network of flood-control devices throughout New Along the way lies a complex system of dams, See Agencies, Page F3 I 'FLOOD-CONTROL MEASURES THE CONNECTICUT RIVER There are 32 Soil'CoRSerYation Service flood WATERSHED control dams on smaller tributarl_ in the ,nnecticut River watershed. \ . THese unmanned dams are usually -~ dry but in flood time hold back excess J water. Tiley have fixed openings and discharge only enough water to meet MAINE downstream channel capacity. r ~ VERMONT , \ ( There are 16 U.S. Anny Corps of En"""" flood control dams on main tributari_ of the Connecticut River. • Most of these larger dams are manned and ) FLOOD c=:. have controll,able outlets. Th,ey are usually dry. ~---I_I_••~.~, .-:n:::. In.flaad..time...tbev.send_cootinuaus level ~ ~~~__~~__~r ........·..,-.:. "'".•••.,,_....._-~-_........ _. -- ----'"1 dry but in flood time hold back excess water. Tt'e'y have fixed openings and dischlrrge, only enough water to meet downstream channel capacity. r ~ VERMONT ( There are 16 U.S. Anny Corps of Enpneen flood· control dams on main tributaries of the Connecticut River. • Most of these larger dams are manned and ) have controllable outlets. They are usually dry. In flood time, they send continuous level readings to the Corps Reservoir Control Center in Waltham, Mass. Those readings, combined with Northeast River Forecast Center predictions, determine amounts of water to be l discharged. NEW YORK . Not all dam. are for flood control. Many other apncles maintain da.... for other purpo.... • The Stevenson Dam on the Housatonic River, for example, I generates electricity. The Saville Dam on the Farmington River forms the Barkhamsted Reservoir and is designed to provide water supply. • Other measures include preserving major natural water-storage areas and existing wetlands; acquiring open lands, encouraging farming to decrease susceptibility to flooding, flood-proofing existing structures, and improving I 30 mil.. , warning systems and emergency responses. LONG ISLAND SOUND DOWNSTREAM STRUCTURES IN BUILT·UP AREAS PROVIDE ADDITIONAL PROTECTION • The Park River has been diverted into a tunnel as it goes through Hartford on its way to join the Dikes and tunnels Connecticut River. It normally flows by gravity. But in flood time, when its outlet is underwater, Channel alterations pumps help to move the water. HARTFORD, • Trout Jlrook IrI W4lSt Hartford was stfalghtMeOatld • Dikes haY,e been buirt along the Connecticut River at Chicopee, ~ to )nctease·~ al'ld Holyoke and Springfield, Mass., and at East Hartford and Hartford. reduce,resl8t8nCe, ~I,dng "',cha~,...fiICI8nt SOURCE: State Department of Environmental Protection, Water Resources Unit, Flood Manjlgement Section Phil Lohman I The Hartford Courant ,{ ~ ------, '\ THE HARTFORD COURANT: Thursday, April 16, 1987 F3 Agencies mold landscape to tame Connecticut River Continned from Page Fl The dams, which usually are built from a. combination of soil, gravel and rocks, range in capacity from 482 million gallons to more than 31 billion gallons, Coogan said.' Con crete spillways are used to control how much water is released, he said. Corps officials estimate that three dams in Connecticut - the Mad Riv er and Sucker Brook dams, both in Winchester, and the Colebrook River dam in Colebrook - have prevented nearly $30 million worth of damage downstream since they were built in the 1960s. Most corps dams in New England have operators who call the River ForecastCenter every morning with reservoir levels, local weather and daily rainfall data, Mazarowski said. During the recent storm, several reservoirs in northern New England reached their capacity {or the first time since they were built, Coogan said. More water had to be released from the reservoirs to relieve pres sure on those dams, but the excess' water did not reach Connecticut un til after the river had begun to re cede. Throughout the rainy week, infor mation traveled fast and furiously between the River Forecast Center and the corps' reservoir-control cen ter in Waltham, Mass. Using a com puter model that takes into account predicted rainfall and reservoir lev , els, corps officials could decide how much water could be released safely from its dams. "It becomes a dog chasing its tail, hopefully with a good conclusion," Mazarowski said of the information relay. Larger towns along the river, such as Hartford, East Hartford and Springfield, receive further protec tion from dikes built by the·corps. The East Hartford dike, built in 1949, runs along 75 percent of the town's riverfront, said William Ken nedy, town director of public works. The 39-foot-high concrete structure can keep the town dry for a river U.S. Army depth of up to 26 feet. During the flood of 1936, the Park River, in foreground, Hartford under water, including most of Bushnell Park, at ground and a network of dikes was built along the Con "Any development in the extreme necticut River to prevent another disaster. north and south end [of East Hart combined with the Connecticut River to put a fifth of left. The Park River SUbsequently was diverted under- ford] is above 26 feet," Kennedy said. When the river crested last thing that is built and every wetland usefUl if residents know what to do week at 26 feet, East Hartford had that is filled in that triangular slice when a storm is coming. The SolI only minor flooding problems. of the state affects river levels. Conservation Service has received Without the dikes, Kennedy said, When asphalt and buildings cover an $18,000 federal grant to help most of the development along the land, less water goes into the ground homeowners who live near the river riverfront could not exist. and more runoff heads for the near prepare for flooding. Aside from the corps' large dams est streams. A subdivision that fills Too often, officials say, homeown and dikes, the Soil Conservation in wetlands in South Windsor, for ers do not realize how to protect Service, a division of the U.S. De instance, can raise the level of the their possessions from rising waters. partment of Agriculture, has spon Podunk River, dump more water "People wait until it gets to an eleva sored several smaller projects along into the Connecticut River and wors tion of 13 feet and just drive away," flood-prone tributaries. en the flooding in Middletown. Christensen said. Onil! mil!thntl n~ tn Ir_n wAtil!r WiI!tJAnd!l whil!n lil!ft in thil!ir nAt.lI Conservation service workers '-Ioraj 15 aDOve ~tI leet," 1\.enneay said. When the river crested last thing that is built and every wetland useful if residents know what to do week at 26 feet, East Hartford had that is filled in that triangular slice when a storm is coming. The SOlI only minor flooding problems. of the state affects river levels. Conservation Service has received Without the dikes, Kennedy said, When asphalt and buildings cover an $18,000 federal grant to help most of the development along the land, less water goes into the ground homeowners who live near the river riverfront could not exist.