Consulting Civil and Environmental Engineers Since 1972
Completed in 1998, the Mary Griswold Steube Fishway at Lower Mill Pond Dam in Old Lyme, Connecticut was constructed as a cooperative venture of the Connecticut River Watershed Council and the Old Lyme Conservation Trust.
Named in honor of a generous benefactor of the Old Lyme Conservation Trust who donated the project site, the fishway provides a means for anadromonous fish (alewives) to pass the dam and spawn in the pond and central reaches of the Mill River.
The fishway consists of concrete entrance and exit structures, a concrete resting pool with a side viewing window for counting fish transiting the fishway, and an aluminum steep pass structure.
Aesthetics were an important part of the project as the fishway could be seen from a dwelling located immediately across the Mill River from the project.
Nathan L. Jacobson & Associates, Inc. received a GreenCircleTM Award in 1999 from the Connecticut Department of Environmental Protection for design and construction administration services for the project.
The Portland Cement Association honored the Depot Road Bridge with an Award of Excellence, in an international competition recognizing creativity and imagination in the aesthetic design of concrete bridges.
Completed in 1996, the Depot Road Bridge project included the replacement of an historic stone arch bridge built in the early 1800's.
The new bridge consists of a precast rigid frame, with cast-in-place concrete parapets and wingwalls, supported on timber piles for scour protection.
Most notable is the concrete form-lining and color-staining utilized on the wingwalls and parapets to simulate the appearance of stone masonry.
Consideration of site aesthetics during design of roadside safety improvements also led to the selection of an AASHTO approved steel-backed timber guide rail that complements the appearance of the simulated stone masonry. Nathan L. Jacobson & Associates, Inc. was reported to be the first to use either of these two aesthetic solutions on a State Local Bridge Program Project in Connecticut.
The 130,000 square foot School of Law, located at the base of Sleeping Giant State Park, forms the western terminus of the University's "Village Street".
Located in an Aquifer Protection Zone of the South Central Connecticut Regional Water Authority, and directly adjacent to a groundwater pond, the site design required a careful and thoughtful approach to preserve sensitive environmental resources.
Nathan L. Jacobson & Associates, Inc. responsibilities included the design of all site improvements including pedestrian and vehicular access, parking and all supporting civil utilities (water, gas, sanitary and stormwater). Additional responsibilities included coordination with other site utilities, and obtaining all necessary local, regional and state land use and environmental permits.
Completed in 1994, under the direction of Centerbrook Architects, the Quinnipiac University School of Law design team received an AIA Design Award in 1997.
Nathan L. Jacobson & Associates, Inc. have served as Quinnipiac University's Campus Civil Engineers since 1991, when the University began an ambitious campus wide expansion program.
Throughout the past 20 years, Nathan L. Jacobson & Associates, Inc. has enjoyed a close working relationship with Mount Saint John School, serving as its engineering consultants on a variety of school development projects. During the June 2000 Commencement Service, Nathan L. Jacobson & Associates, Inc. was awarded the prestigious Macdonald Medal with the following inscription:
"The Macdonald Medal is given each year to a friend of this institution. Nathan L. Jacobson and Associates have been good friends of Mount Saint John for many years. Mr. Nathan Jacobson and Mr. Jeff Jacobson have worked with Mount Saint John over the years on a great many projects. Friends of, and respected by, Father Macdonald, the company provided essential services to Mount Saint John as the property on the Mount underwent extensive renovation and development. Always helpful and often answering urgent calls for assistance over the years, Nathan L. Jacobson and Associates have contributed greatly to the well being of the boys who live here.
For that, we at Mount Saint John are extremely grateful. Two years ago, the company celebrated its 25th anniversary. We not only congratulate them on that anniversary, but also thank them for being so good to Mount Saint John during those years. It is a happy moment for us at Mount Saint John to offer you this tribute today. Nathan L Jacobson and Associates has been a good friend of Mount Saint John. May God always watch over you. May you value this award and treasure the memory of the man in whose honor it is named."
The New England Chapter of the American Concrete Institute, Inc. and The New England Ready Mixed Concrete Associations honored Nathan L. Jacobson & Associates, Inc. with an award in 2001 for their design of the Cherry Hill Road Bridge project in Middlefield, Connecticut. This award is given each year to formally offer recognition to projects in New England, whose design and construction represent the best in concept, originality and application of concrete and concrete products.
Besides being adjacent to Wadsworth Falls State Park, the project site was determined to be eligible for listing on the National Register of Historic Places due to the presence of an arch gravity brownstone dam immediately upstream of the bridge, remains of the original 1868 bridge abutments, 19th century dam abutments, one or more water power flumes, and buried mill foundations. One of the flumes ran immediately behind one of the abutments of the existing deteriorated 50 ft. twin span concrete tee-beam bridge.
Given the close proximity of the State Park and various historic features, principal design objectives for the new bridge included: modification of roadway geometrics to improve pedestrian and driver safety while protecting historic site attributes; accommodation of the hydraulic implications of removal of the dam upstream of the bridge; and, a context sensitive design which reflected existing historic elements and complimented the adjacent State Park setting.
The new bridge consists of a 91 ft. simple span prestressed bulb-tee beam superstructure with composite concrete deck on concrete gravity abutments poured on rock. The bridge design included roadway geometric improvements; elimination of the center pier in the river and increase in low chord elevation; minimal impacts to historic site features which included spanning of the flume that ran behind the existing abutment; and, attention to aesthetics. Aesthetic bridge treatments included a pigmented and sand blasted crash-tested FHWA approved concrete balustrade bridge rail with a concrete mix designed for densification and durability of the rail; simulated stone masonry substructure including the appearance of a concrete bridge seat "poured on brownstone" and "stepped" wingwall tops designed to match adjacent existing brownstone; color staining of sidewalks, curbs and fascia beams; and, steel-backed timber guiderail.
The project also included improvements to the adjacent Wadsworth Falls State Park parking area, including handicapped accessibility and landscaping.
In 2000, the project also received a Merit Award from the Connecticut Engineers in Private Practice, Inc.
Nathan L. Jacobson & Associates, Inc. received an Environmental Merit Award in 2001 from the New England Office of the U.S. Environmental Protection Agency. The Merit Award recognizes environmental advocates who have made outstanding efforts in preserving New England's environment.
Two such contributions by Nathan L. Jacobson & Associates, Inc. included design and construction administration services for the Mary Griswold Steube Fishway at Lower Mill Pond Dam in Old Lyme, CT and the Ed Bill's Pond Dam Fish Ladder in Lyme, CT. The latter project is shown in the photos at right.
Prior to construction of the fish ladder, Ed Bill's Pond Dam was the Eight Mile River watershed's only remaining impassable barrier to significant spawning habitats for Atlantic salmon, American shad, alewife, blueback herring, sea lamprey and sea-run brown trout. Construction of a fishway at this location completed the restoration of spawning access to the Eight Mile River.
Completed in 2000, the Fish Ladder at Ed Bill's Pond Dam in Lyme, CT was constructed as a cooperative venture of the Connecticut River Watershed Council, the Connecticut Department of Environmental Protection, the U.S. Fish & Wildlife Silvio O. Conte National Fish & Wildlife Refuge, and the Lyme Land Conservation Trust. The fish ladder consists of concrete entrance and exit structures, and an aluminum steep pass structure that provides a means for anadromous fish to pass the dam and spawn in the pond and the East Branch Eight Mile River.
The fishway also includes a separate aluminum pipe conveyance channel to allow juvenile sea-run brown trout to safely migrate to the river reaches downstream of the dam. A novel design feature of this facility was the suspension of a significant portion of the fish ladder from an abutment of a bridge spanning the East Branch Eight Mile River immediately downstream of the dam. This eliminated the need for a separate support structure and minimized disturbance to the river environment.