Tag: New Jersey

Stormwater Utilities Make Good Municipal Sense

Following the devastating flooding caused by Hurricane Ida many Lower Raritan Watershed communities want to know more about how good stormwater management can help minimize future flood impacts and damages. This video recaps the LRWP’s workshop held 10.6.2022 with NJFuture’s Brianne Callahan talking about stormwater utilities, an innovative strategy for municipalities to use to bring awareness to the role of land use choices on flooding and water quality, and to prompt community action to improve stormwater management.

Here is a link to the “share” version of our slide deck. It is set to “View Only” mode, feel free to download!

The Embers Burst Into Flames

Article and photos by Joe Mish

Blaze orange leaves adorn this local black oak. Nature’s seasonal clock has struck 10, autumn has arrived as October takes out a full page ad to showcase its array of brilliant color.

The hot breath of August turns September mornings into a smoldering mist as embers of summer’s end burst into an explosion of October color.  

The early morning autumn mists, so prominent along the rivers and brooks that flow gently across the landscape, stir the imagination to reach back in time to a place where magic was the accepted answer to the wonders of nature. 

Dark green leaves turning to fluorescent orange is the stuff of wonderment. The purpose of which is to generate thought and build creative answers to perplexing questions. It is as if nature is guiding human evolution to higher intelligence by flashing colorful prompts to articulate a creative response. Creativity is the foundation of knowledge and its application. A warm up exercise for the immersion into disciplined technology, ruled by logic and reason. 

The heavy white mist, rising from the river, overflows the pastures, providing a blank slate, into which the light of dawn infuses clouds of ever-changing color. A band of intense pastels emerge from the night and rest upon the horizon to await the sun’s arrival. The first color to appear is a layer of fireball red which cools to an orange glaze, so intense, it appears the world is on fire. Purple streaks fading to rose, pink and salmon support layers of golden yellow, chartreuse and sulfur. This celestial palette, stirred by the rushing wind, spurred on by the sun’s heat clashing with the night’s cool air, disperses the colors to tint the rising river mist.

The predawn light begins to color the rising mist along the South Branch

The early morning light show vanishes into thin air as the sun rises to its zenith above earth. Brilliant blue sky, unmarked by clouds, stand in contrast to the colorful October foliage. Late afternoon herds of fluffy white clouds appear animated as their structures are constantly reshaped by the whim of the wind.  Each bold cloud, composed of delineated puffs of white, bordered by shades of gray, compel interpretation as they resemble earthbound faces, animals and objects. Again, a playground for the imagination to run wild, compliment of autumn weather. It is easy to understand how humans used the sky to interpret messages from the beyond, as true in paleolithic times as it is today. Playing with clouds is to share the exact same emotion and interpretive conclusions as long-gone ancestors. The clouds become a portal in that way, piercing the impenetrable wall of time to prompt creative interpretation, likely more aligned than different.

Fluffy white clouds invite the viewer to ride the sea of imagination.

It is the colorful autumn foliage which garnishes the late day clouds and dramatic morning river mists of October. At a distance, woodlands appear as a single undulating blanket, woven with colorful threads, showing irregular swatches of yellow, green and scarlet. Viewed as a time lapse, the colors expand southward, while the northern edge reverts to earth tones of grayish brown as if consumed while on the run, from the hungry wolves of winter. 

Brilliant, blaze orange oak leaves defy imagination in their intensity, and stand in bold contrast to the conservative green, brown and gray tones that dominate the landscape. Like a flash of fire, its sight demands our absolute attention as sure as the flash of a lightning bolt. In that long moment of awe, imagination, held in abeyance by reality, rushes in to disrupt the continuity of time.  

October is totally dedicated to autumn and all its glorious color, a time when golden mists and billowy white clouds mark the transition between summer and winter; a perfect agreement between two polar opposites.  

The trail of Octobers past, is a familiar well-worn path through time, lit with the brilliance of golden leaves, beckoning the traveler deeper into a world of timeless beauty.

The trail of Octobers past, is a familiar well worn path through time, lit with the brilliance of golden leaves, beckoning the traveler deeper into a world of timeless beauty.

Author Joe Mish has been running wild in New Jersey since childhood when he found ways to escape his mother’s watchful eyes. He continues to trek the swamps, rivers and thickets seeking to share, with the residents and visitors, all of the state’s natural beauty hidden within full view. To read more of his writing and view more of his gorgeous photographs visit Winter Bear Rising, his wordpress blog. Joe’s series “Nature on the Raritan, Hidden in Plain View” runs monthly as part of the LRWP “Voices of the Watershed” series. Writing and photos used with permission from the author. Contact jjmish57@msn.com.

Memories are Where You First Met Them

Article and photos by Joe Mish

This maroon shale cliff forming the river’s bend, serves as a memory retrieval bank for times gone by. I was canoeing with my late friend Jimmy, who caught and released a feisty smallmouth bass just upstream of that shale prominence. Memory storage may be why the shore of a river is referred to as a ‘bank’.

Over the course of time everything we experience is stored as a memory. Having limited capacity for recall, it is the most impactful memories that linger. By no means are memories ever lost, they are stored in pristine condition in unconscious archives. The key to recovery can be a scent, sight or a sound. Prompted by clues hidden in unrelated conversations, a single phrase or word can bring an experience back into sharp focus. Old, faded photographs of no particular beauty or composition can instantly bring the past into laser focus as the prompts to our memories are as individual as fingerprints.

So it is that each time I paddle the river, it becomes a physical journey through the accumulated memories collected over hundreds of miles, paddled on the same stretch of river. Each trip is like opening the old family album to add new photographs and seeing the older images as the pages are turned. It is as if a gravitational pull compels you to linger a bit longer in the realm of old memories.

There is hardly a location on the river that does not hold a memory for me. Digital images and photographs, abound, however, it is being present on the river that provides access to memories not captured by the camera or pushed aside by the endless flow of freshly minted memories.

Every time I pass the drainage above the mouth of Pleasant Run, my mind immediately plays the video of the snowy winter day I pulled out of the current into the safe harbor of a drainage stream to warm my hands under my arms. The heavy snow quickly covered me and my boat as I leaned forward, folded arms resting on my thighs. I felt safe and comfortable as the canoe was stabilized in the heavy slush and well within the six-foot-wide drainage stream away from the main current. The snow was almost a foot deep along the high bank and to my surprise a dark brown mink was porpoising through the deep snow toward the drainage and my canoe. The mink came within arm’s reach before it realized the convenient bridge and large lump of snow was an existential threat.

One summer day I had my young daughter in the bow of my canoe, as we approached the tower line near home, a large fish jumped clear of the water, hit the gallon jug of juice she was holding, bounced off the opposite gunnel and fell back into the river. Her expression was priceless, as was mine, to witness a scene that could only happen in a cartoon. Can’t pass under that tower line without reliving that moment! Though many years have passed, the clarity and even the emotion of that comedy is still retained in the tower line archives.

On an initiation canoe trip with my four-year-old grandson, I paddled close to a high shale cliff, as in my experience cliffs were a major attraction to young boys. Sure enough, Caleb was impressed and asked how to get to the top. Before I could answer I noticed a large animal on the narrow shelf at water’s edge below the cliff. We closed in on a supersized beaver munching some delicate vines growing on the cliff face. The beaver slowly moved into deeper water but not before swimming on the surface a few yards in front of the canoe. You will not be able to see it, but when I pass that cliff, it reveals a crystal-clear video of that priceless moment. Of course, the next day Caleb never mentioned the beaver to mom but was totally impressed by Grampy carrying the canoe over his head.

One early spring day after ice-out, the river was running high, and the only ice that remained was found in deep cuts into the bank where trees were washed away. As I rounded a sharp bend in the river, I kept about three feet off the left bank to avoid the main current. Immediately on my left was a large ice-covered cove about twelve feet into the high vertical bank. I could not believe what I saw! Standing in sharp contrast to the empty expanse of graying ice, was an otter!  As it ran toward me, I realized its only escape route was into the water next to my canoe. At less than two feet away I watched the otter dive into the fast-moving muddy water in the narrow space between my boat and the ice shelf. I thought I was hallucinating, perhaps hypothermic. I never saw an otter on the river before or since. Consider, this bend in the river projects the memory of my close encounter with an otter, exclusively for me. It is my personal archive, available to no one else.

Memories are where you first met them, they are safe from prying eyes and remain where you last left them. The storage capacity is infinite and the keys to unlock them are everywhere.

Author Joe Mish has been running wild in New Jersey since childhood when he found ways to escape his mother’s watchful eyes. He continues to trek the swamps, rivers and thickets seeking to share, with the residents and visitors, all of the state’s natural beauty hidden within full view. To read more of his writing and view more of his gorgeous photographs visit Winter Bear Rising, his wordpress blog. Joe’s series “Nature on the Raritan, Hidden in Plain View” runs monthly as part of the LRWP “Voices of the Watershed” series. Writing and photos used with permission from the author. Contact jjmish57@msn.com.

The Lawrence Brook and its Mills: Introduction

Author: Richard Walling

From its headwaters in the Devil’s Brook Swamp at Monmouth Junction, to its outlet on the Raritan, Lawrence Brook once powered six mills from Deans to New Brunswick. Over the next few months local historian Richard Walling will share his research (including photos and maps) into the history of the Lawrence Brook Mills sites and their relationship to our Raritan River and Lower Raritan Watershed.

Richard is pictured here at the Farrington Lake step-dam, the site of a mill dating to the 1750s. He writes: “By the way, if the Brits had continued their 1778 withdrawal from Philly towards New Brunswick, what developed as the Battle of Monmouth could have taken place along the Lawrence Brook.

This is the first in a series about mill sites along the Lawrence Brook.

Let us begin at the beginning: Geologically speaking, the Lawrence Brook generally separates two types of land forms in central NJ: the Piedmont & the Inner Coastal Plain. Brunswick shale is to the north of it, and loam to the south of it. The famed Middlesex County clay district extends westerly along the southern bank of the stream, at least as far west as Farrington Lake. Many of us remember digging gray clay from the shoreline near the broken dam in present-day Bicentennial Park (East Brunswick).

The Lenape called the stream, piskëpekw [-w is a whispered voiceless w], meaning “dark water”. Whether this alluded to the water’s color, to the shadowed waterway caused by steep banks, or even possibly from it’s headwaters at Devil’s Brook Swamp (did the Lenape call Devil’s Brook by the same connotation in their own language?). The land form of a neck, where Rutgers Village is located, was called ramawùnk (Ramawon in English), meaning “under the hill” or “under the bank”. Translations are provided by Lenape linguist, Ray Whritenour.

Native American artifacts are found all along the stream’s course and a path still runs along its eastern portion in the vicinity of Rte. 18 near the NJ Turnpike (Westons Mills). When a parking lot was being constructed on the Cook College campus, a cache of projectile points was found. The high ground at places like von Thun’s farm in South Brunswick, and Rutgers Gardens in New Brunswick once hosted villages. I know many folks who picked up artifacts in East Brunswick along Farrington Lake.

The earliest land transfer was from Native leaders to Thomas Lawrence, The Baker, a NY city merchant. As you can see from the circa 1685 map of the area, his holdings were affirmed by the East Jersey Board of Proprietors.

Map from 1685 showing the Lawrence Brook in relation to the Rariton (sic) River, South River, and land holdings of the time, source: https://www.loc.gov/item/97683564/

Early East Jersey Proprietary Period

June 7, 1677 Conveyance Record (see copy below).

TO: Thomas Lawrence (Baker) (of New York)

FROM: Indians; Isarick; Kesyaes; Metapis; Pehawan; Queramacke; Turantecos

CONVEYANCE. Land called Ramawon on the south side of the Raritan River. [East Jersey].

Tract of land called Ramawon bounded by the Raritan and Pisscopeck Rivers.May 1, 1678

TO: Thomas Lawrence (Baker) (of New York; [Lawrence the Baker])

FROM: George Carteret (Sir) (Lord Proprietor); Philip Carteret (Esquire) (Governor of the Province)

PATENT. 1300 acres. South side Raritan River; a creek called PiscopeckIn 1693, the creek, now called Lawrence Creek (Brook), was granted to Peter Sonman, running from near Rocky Hill, all the way to Thomas Lawrence’s grant along the Raritan.

Oct. 20, 1693 TO: Peter Sonmans (Merchant) (of London; Proprietor; Son of Arent Sonmans, deceased, and Frances Sonmans; Brother of Johana Sonmans and Rachell Sonmans)

FROM: Proprietors of the Province of East New Jersey

CONVEYANCE. 38600 acres. Between Milston and Raritan Rivers; beginning at the Partition Line between East and West Jersey; opposite the foot of Rockie Hill; on both sides of Lawrence Creek; to the South River; Middlesex County.

June 7, 1677 Conveyance Record. NOTE: Isarick may have been the father of Wequeheela, who resided in present-day Spotswood.

The 1781 map below, drawn by a British Army cartographer, is a general depiction of the stream, and of George’s Road (present-day Rte. 130 in part), George’s Road led from George Rescarrick’s Tavern (circa 1686) in Cranbury to New Brunswick. Below Cranbury, it led to Hightstown, Allentown, Crosswicks and points south. Longfield’s Mill is where Rte. 18 crosses the stream, a stretch known as Westons Mill.

Rich’s next installment will be on the Headwaters of the Lawrence Brook.

Eastern Potash: A Chimney in the Woods

Article by Walter Stochel, President Edison Greenways

As you travel on the New Jersey Turnpike and cross the Raritan river on the Basilone Bridge, look to the south along the Edison riverfront. You will see a large masonry chimney sticking up out of a forest. How that chimney got there is the story of an ambitious industrial project that started during World War I and was never completed as planned. Then World War II took the plant in a new direction.

In 1917 the lower Raritan River in Edison (then Raritan Township) had not changed much since the first settlers arrived in the 1660s. It was still mostly salt hay marshes that flooded twice a day with the tides and a few docks, for clay and sand mines to ship their excavations to brick plants in Sayreville, Woodbridge, and elsewhere.

World War I changed the riverfront in Edison forever. In the winter of 1917/18, the US Army acquired thousands of acres along the Raritan, and built the Raritan Arsenal. The Arsenal property was diked and ditched. A huge dock was built so that munitions could be loaded on barges and ships and sent to France for the American Expeditionary Forces. Upriver, a proposal to build a large industrial complex was announced in 1918 to great fanfare by the New Brunswick Board of Trade. The Eastern Potash plant was to be located off of Meadow Rd on former Callard farm, a 55-acre tract of land in the Piscatawaytown section of Edison.

The Eastern Potash plant was huge. A barge canal 100’ wide and 1600’ long was dug on the north bank of the Raritan to access the site. A $150,000 traveling crane was built over the canal so barge loads of greensand could be scooped out and moved to the plant for processing. The main building was 2 stories tall, 300’ wide, and 600’ long. A powerhouse was built along with 12 digesters. The biggest kilns in America would be in the plant. A brick plant was built on the site to produce bricks for the plant’s other buildings and for sale. Waste sand and clay from potash production would be used to make bricks.

The plan was to produce 1,000 tons of potash daily, using 2,000 tons of lime per day. In October the company expected operations to start by the first of the year in 1919. To access the plant, the Lehigh Valley Railroad laid two miles of track. The freight station at the plant was named “Greensand”. Greensand is a natural soil amendment also known as glauconite and is a great source of potassium that helps plants grow. The greensand that they were going to mine in the Matawan area contained 7-9% potash. Why build this plant at all? Prior to WWI, Germany shipped large amounts of potash to the US. With this supply cut off, American potash sources needed to be developed. In March 1919 ground was broken for the $2,000,000 plant. A man named C.R. Blood was placed in charge of plant construction. Excavators began digging out the canal on the north shore of the Raritan River.

Due to the war and shortages of materials work was slow on the plant. It was not until July 1919 that building supplies started to arrive, and in November 1919 Bethlehem Fabricators were hiring laborers to build the plant at .60 per hour. Little did they know, that the plant was doomed from the start. World War I ended in November 1918, much earlier than American military planners anticipated. When the conflict ended, trade between the warring nations resumed. By 1921 Germany had started shipping potash to the United States at a much lower cost than it took to produce it here.

Potash production at the Eastern Potash plant along the Raritan River required a massive effort of transporting tons of greensand by barge from downriver and tons of limestone by rail from North Jersey, then unloading and processing all of it. When the process was complete, bricks would be made from the tons of waste from the potash production process. A powerhouse with a large chimney was built in order to power potash production. The original plan was to bring in tons of coal, but the new rail line lacked the capacity to move the coal to the site, in addition to the limestone, and ship back out the finished potash. So, the developers of the plant came up with the idea of using oil to power the plant. An oil tank farm was built further up Meadow Road behind the plant, and tankers full of oil from Mexico would dock at the plant and unload. This operation became known as the Raritan Refining Company, a subsidiary of Eastern Potash. However, the Raritan River was not deep enough for the tankers. So, they had to dock at Bayway on the Arthur Kill, and oil was to be barged to the plant.

Billed as the “largest potash plant in the world,” the plant was highly touted in the New Brunswick newspapers with 58 articles mentioning the plant in 1920 alone, including large advertisements asking New Brunswick residents to invest, and promising their investment would yield heavy returns on stock. Artistic renderings of the plant were shown. Shortages of housing for workers were projected. Construction of the plant was progressing, with opening promised in mid-year, then late year.

1921 began with continued positive news about Eastern Potash. In February there were prospects for early operation of the plant, and work on the refining plant continued. In July the refining plant was ready for operation. The powerhouse generated electricity which was sold to Granton Chemical next door. By August there were complaints about oil pollution from the plant at the Tea Pot Inn beach just up the river. By the end of 1921, the lime kilns were completed and the plant cost $4,000,000. It had been three years since the plant was proposed, and not one ounce of potash had ever been produced.

The end of the Eastern Potash Plant began in 1922, with the appeal and non- payment of property taxes to Raritan Township. Contractors began to sue to get paid, and finally large stockholders sued, calling Eastern Potash a “stock swindling operation.” In 1923 Eastern Potash went bankrupt. One lawsuit by a stockholder said that the plant never “turned a wheel” and the president of the company was making over $100,000 per year. C.R. Blood, the construction superintendent of the plant, resigned and moved to Florida. Eastern Potash went into receivership, and a successor company called Building Materials Corporation acquired the plant with the plan to make bricks.

Bricks Will Save the Plant
Brick making operations started on August 17, 1925 at a rate of 100,000 bricks per day, with the bricks being used for buildings on the plant site. The Home News reported that the plant produced 150,000 bricks per day in 1927. The Aero Corporation announced in 1928 that they would be making airplane engines in the old potash plant, but this did not happen. Aerial photographs from 1931 show a barge in the canal, a pile of materials on the dock, and a loop railroad track around the plant. The powerhouse and chimney are also visible.

Thomas Edison Company Steps In

In 1932 the plant was bought by Metropolitan Concrete Co., a subsidiary of Edison Portland Cement. Plans were to use the plant to make 1,000,000 barrels of Portland Cement per year. In 1933, Edison estimated it would cost $500,000 to adapt the buildings for the manufacture of cement. In April 1935 it was anticipated that the plant would open in 3 months, but it never did. Despite nine years of planning work, the company did not produce any cement at the plant. In 1941, it was announced that the plant would be sold to the Chilean Trading Company for $134,000, who had plans to dismantle the plant and ship it to Chile.

Sailing away to Cuba

America entered World War II on December 7, Suddenly, there was a great need for steel and nickel for the war. The main source of nickel for US war industries was in Canada, but it was not enough. In 1942 a new source was developed in Cuba, but there was no plant to process the nickel. The Defense Plant Corporation financed Nicaro Nickel Corporation to build a processing plant in Cuba, but there was no steel available.

Along the Raritan there was the abandoned potash plant with over 1400 tons of structural steel in it and a large gantry crane. So, the Defense Plant
Corporation bought the old potash plant for $71,000, dismantled it, transported it by rail to Florida, and then shipped it to Cuba where it was used in the nickel processing plant. Even the giant gantry crane was moved to Cuba.

The new plant produced nickel, a material vital in armor plating in ships, tanks, and airplanes for the US war effort, and remained in operation until 2012. While back in Raritan the only thing they did not take was the chimney, which is still visible today sticking out of the woods along the Raritan River, a silent memorial to an industrial dream of the early 20th
century. To view a movie of the construction and operation of the plant, including the gantry crane in Cuba, go to:


Copyright 2020 Metuchen-Edison Historical Society go to www.mtuchen-edisonhistsoc.org for more information

Weston Mill Dam Removal

Article and photos by John W. Jengo

The Weston Mill Dam and the former Weston Mill gristmill and sawmill site are located approximately 1.5 miles upstream of the Millstone River’s confluence with the Raritan River, and immediately downstream of the Weston Causeway (Wilhousky Street) Bridge in the Borough of Manville and the Township of Franklin, Somerset County, New Jersey. The dam crest length was approximately 112.5 feet long and there was a concrete approach apron that ranged in thickness from 5 to 6.75-inches that extended 17.5 to 18.5 feet upriver of the dam spillway. The location of the mill was depicted on early Colonial-era and Revolutionary War military field maps, and the mill and dam were picturesque landmarks that were often photographed by local residents, including images included in the book Franklin Township [NJ] – Images of America, published in 1997.

Through an intensive deed search, I determined that a gristmill and dam were established on the east bank of the Millstone River at the project area circa 1747, most probably built by Abraham Brokaw, and the mill was subsequently involved in a Revolutionary “Forage War” skirmish between British and American forces on January 20, 1777 while under the ownership of Abraham Van Nest.  Recovery of two cornerstones during 1983 salvage operations suggest major mill building and rebuilding efforts occurred in 1803 and 1844 by John M. Bayard and Isaac R. Cornell, respectively.  Though the mill remained active at this site into the early twentieth century (it was the most productive mill in the Millstone River/Stony Brook drainage), under various private owners and incorporations (Weston Mill Company, Inc.; Community Flour Mill and Grain Company; Union Mills Company, Inc.), and the dam underwent significant structural repairs between circa 1922 and circa 1948 by its last owner (Wilbur Smith), it ultimately fell into disuse and disrepair. On May 31, 1982, the mill building partially collapsed into the Millstone River. Mill artifact salvage operations were initiated on June 25, 1983 but were abandoned when arson claimed the collapsed structure on July 7, 1983.

When I first began assessing this dam in 2009 as a candidate for removal, the Weston Mill site included the brownstone and concrete foundation remains of a gristmill that had enclosed a turbine room (formerly the water wheel pit) and a tailrace room, and there were associated powertrain components scattered throughout the site, including multiple bevel gears, possible mortise and pin gears, sprocket gears, drive shafts, counter shafts, flat belt pulleys, and other mill-related power-train apparatuses. A concrete coring project conducted in August 2015 at five representative locations on the dam approach apron (the same effort that determined the thickness of the apron) revealed two concrete approach aprons, which suggested that the dam was reinforced or rebuilt with concrete in two different periods in the early- to mid-twentieth century and that this run-of-the-river dam may have been built on top of a timber crib dam of unknown age.

Routine visits to the dam site over the next eight years would indicate that beginning in 2015, the eastern 78 feet of the dam crest (i.e., the top of the spillway) and spillway began to noticeably subside and detach from the concrete approach apron, placing undue stress on the riverward mill foundation wall to the east.  By mid-2017, the collapsing dam crest and spillway had subsided almost to the level of the downstream pool elevation, had deflected outward some five feet downriver, and in doing so, the flow of the river was redirected toward the mill ruins on the east bank, potentially causing adverse effects to the mill foundation and complicating the dam removal.

The dam removal and the engineering plans were re-designed to include emplacing scour protection around the Weston Mill foundation walls to arrest the damage to the ruins and preserve the remaining fabric of the site for future study.  The first step in the dam removal process, which commenced on August 14, 2017, was to initially breach a portion of the dam to reduce the differential head between the upstream and downstream pools. The initial breach width of 35 feet, located near the center point of the dam, produced the desired upstream pool drawdown and a relatively low current velocity through the breach. Once the upstream impoundment had drained, the contact between the concrete approach apron and the riverward mill foundation wall was accessible to be saw cut to isolate the apron from the mill wall prior to further demolition. This was done to ensure that neither the weight of the demolition excavator or the vibration of the hydraulic hammer would destabilize the riverward foundation wall.

After the saw cut was completed, the concrete approach apron, an underlying concrete sub-apron, and dam spillway were carefully detached and removed.  Imported rip rap was then emplaced around the mill foundation walls. My experience working on the rivers of this watershed indicated that natural sedimentation from storm events would eventually blanket and in-fill the rip rap, enhancing the stability of the scour protection armament. Finally, a restored river channel thalweg were excavated and contoured appropriately.  It was during these excavations that segments of a timber crib dam, secured to the river bed by using 17.5-inch to 20.5-inch long, 1.125-inch square iron spikes, were extracted that clearly indicated that the pre-concrete dam structure was a timber crib construction.  Three primary types of roughly square timbers believed to be part of the timber crib dam were identified: 13-foot long lap jointed foundation logs with iron spikes, 9.25- to 9.75-foot timbers with two mortise joints (some with intact dowels), and 3.8-foot timbers with tenons at one end.  Several timbers of this historical structure were saved and donated to the Borough of Manville, Delaware and Raritan Canal State Park, and NJDEP, who had purchased the dam site in 2013 from a private owner, an acquisition that allowed the dam removal to proceed.

Monitoring of the river reach above the former Weston Mill Dam in spring 2018 following the August 2017 dam removal found definitive evidence of successful American shad spawning, an astonishing and long-awaited result given this river reach had effectively been blocked to migratory fish for over 270 years.  Five juvenile shad averaging 4.3 inches in length were found 4.5 miles upstream of the dam at the base of Blackwells Mills Dam during a monitoring visit, highlighting yet again the dam removals can yield near-instantaneous positive results even after centuries of impeding fish migration and spawning.

Video of the Weston Mill Dam removal can be viewed here:

Endnote: Because of the archaeological discoveries made before and during the dam removal, and the rich cultural history of Weston Mill, a standalone video on the History of Weston Mill was developed and can be viewed here:

John W. Jengo, PG, LSRP is a licensed Professional Geologist in several Northeastern and Southeastern states and a Licensed Site Remediation Professional in New Jersey. John works as a Principal Hydrogeologist in an environmental consulting firm in southeastern Pennsylvania. He has degrees in geology from Rutgers University (1980) and the University of Delaware (1982). Over the last 30 years, he has conducted the characterization and remediation of large, complex contaminated industrial sites throughout New Jersey, Pennsylvania, and Delaware. He played a key role in Natural Resource Damage (NRD) assessments that led to groundbreaking legal settlements to remove numerous low head dams on the Raritan and Millstone Rivers to restore historically significant migratory fish spawning runs. As technical project manager, he planned, permitted, and successfully managed the removal of the Calco Dam, the Robert Street Dam, and the Nevius Street Dam between 2008-2013, and the removal of the Weston Mill Dam on the Millstone River in 2017, along with leading the archaeological investigation of the former Weston Mill in the Borough of Manville and Franklin Township.

Nevius Street Dam Removal

Article and photos by John W. Jengo

Nevius Street Dam before removal

The Nevius Street Dam at Raritan River Mile 27.0 was located just south of the Borough of Raritan, Somerset County, New Jersey.  This dam, also referred to as the “Duke Dam,” was constructed in 1901 by James Buchanan (Buck) Duke, the tobacco and hydropower industrialist, for aesthetic and recreational purposes as part of his development of Duke Farms, a 2,740-acre estate in Hillsborough Township, New Jersey.  Careful examination of the dam indicated that it was constructed of dressed stone blocks arranged in a stair-step fashion set into a concrete core foundation that was 195 feet long, approximately 2.5 feet high from sill to crest, and approximately 6.5 feet in width. The picturesque dam and dam impoundment were often photographed in its early years, and some of these photographs were reproduced in the book Raritan [NJ] – Images of America, published in 2003.

The Nevius Street Dam was subsequently converted into an essential part of the Duke Farms water supply system when water pumping withdrawals from the adjacent Raritan Water Power Canal were discontinued in the early 1970s (this Canal water supply system was the original source of water that was pumped up to Duke Farms for irrigation and for circulation through a series of man-made lakes and waterfalls).  This conversion was accomplished by retrofitting a water intake grate on the north side of the dam, and installing a 205-foot long, 30-inch diameter concrete reinforced pipeline that conveyed surface water downriver into a subterranean chamber under the Duke Farms Powerhouse building, which was then pumped up to the Duke Farms reservoir (from there, the water cascaded through the numerous lakes and waterfalls on the property).  This modification allowed Duke Farms to utilize the same infrastructure that had previously provided both hydroelectric power and water supply to the property, although now that the surface water was flowing into the river-level penstock of the Powerhouse rather than falling from a substantial height from the Raritan Water Power Canal, the turbines of the Powerhouse were bypassed and, thus, fell silent.

In the runup to its removal, the Nevius Street Dam was still providing a vital service and with the pending removal of the dam, Duke Farms would be without a water supply for their renowned lake system.  As part of the arrangement to remove the dam, I performed a hydrogeological study at the property in 2012 to determine if new groundwater supply wells could be installed to replace the Raritan River surface water supply.   This alternative proved to be feasible, although it would not be possible to replace the approximately 750,000 to 1 million gallons that was typically pumped up to the Duke Farms reservoir each day.  The tradeoff of a lower volume of groundwater was that the groundwater would be free of high concentrations of total phosphorus, ammonia-N, and nitrate-N that are present in the Raritan River, an impairment caused by runoff of fertilizer and manure from agricultural fields, suburban lawns, and golf courses.   The Duke Farms Natural Resources team were expectant that the introduction of groundwater without excess nutrients might curtail the growth of curly-leaf pondweed and filamentous mat algae that has afflicted the lakes in the modern era.  

The installation of two groundwater water supply production wells was conducted in 2012 and 2016 and befitting Duke Farms’ commitment to the concept of “adaptive reuse,” I and the Duke Farms team conceived of a plan to repurpose underground pipelines that were built in 1909-1910 to connect the new production wells to the reservoir rather than excavate and install thousands of feet of new pipeline through the beautiful and pristine landscape of the property.  Detailed analyses of an original 1911 as-built construction drawing revealed an elaborate underground pipeline network not only leading from the Powerhouse to the reservoir that the current dam pumping system was utilizing, but also a second, intertwined pipeline network that formerly conveyed water from a long-lost Recirculation Plant along the Raritan River that had recovered water after it had flowed through the lake system and recirculated it back to the reservoir.  This pipeline was relocated in the field, flushed along its re-purposed length to remove accumulated sediment from its original operation, had its various values replaced, and was then connected to the new groundwater well field.  This reconfiguration of the water supply system has proven to be a great success and it allowed for the removal of the Nevius Street Dam, which was accomplished between July 24-July 31, 2013.

Nevius Street Excavator – Initial Breach
Nevius Street Excavator – Final Breach

In closing, I would like to acknowledge former Executive Director Michael Catania, Jon Wagar (Deputy Director), and Thom Almendinger (Director of Natural Resources and AgroEcology), and the Doris Duke Charitable Foundation Board for their cooperation and consent to remove the Nevius Street Dam.  Implementing this consequential water supply exchange from surface water to groundwater was not without risk so I am truly grateful for their trust, financial support, and steadfast resolve to implement this project, proving yet again that Duke Farms is a leader in environmental stewardship and an inspiration for citizens to become informed stewards of the land.

Nevius Street Dam After Removal

John W. Jengo, PG, LSRP is a licensed Professional Geologist in several Northeastern and Southeastern states and a Licensed Site Remediation Professional in New Jersey. John works as a Principal Hydrogeologist in an environmental consulting firm in southeastern Pennsylvania. He has degrees in geology from Rutgers University (1980) and the University of Delaware (1982). Over the last 30 years, he has conducted the characterization and remediation of large, complex contaminated industrial sites throughout New Jersey, Pennsylvania, and Delaware. He played a key role in Natural Resource Damage (NRD) assessments that led to groundbreaking legal settlements to remove numerous low head dams on the Raritan and Millstone Rivers to restore historically significant migratory fish spawning runs. As technical project manager, he planned, permitted, and successfully managed the removal of the Calco Dam, the Robert Street Dam, and the Nevius Street Dam between 2008-2013, and the removal of the Weston Mill Dam on the Millstone River in 2017, along with leading the archaeological investigation of the former Weston Mill in the Borough of Manville and Franklin Township.

Lower Raritan Pathogen Results for 10.15.2020

The LRWP and Rutgers Cooperative Extension of Middlesex County monitor for Fecal Coliform and Enterococcus at six non-swimming public beach access sites along the Lower Raritan during the warmer summer months. Fecal Coliform and Enterococcus are indicators of disease-causing bacteria in our waterways.

The EPA recommends that a single Enterococcus sample be less than 110 Colony Forming Units (CFU)/100mL for primary contact. Enterococci levels are used as indicators of the possible presence of disease-causing bacteria in recreational waters. Such pathogens may pose health risks to people fishing and swimming in a water body. Sources of bacteria include Combined Sewer Overflows (CSOs), improperly functioning wastewater treatment plants, stormwater runoff, leaking septic systems, animal carcasses, and runoff from manure storage areas. Enterococci levels are often high after heavy or consistent rainfall.

Below are our pathogens results for October 15, 2020.

Field notes for 10.15.2020

What a beautiful day for monitoring! Americorps Watershed Ambassador Caitlin DiCara helped us out with monitoring. We were also joined at our Piscataway and New Brunswick sites by our Windows of Understanding 2021 artist Marcia Shiffman. Marcia’s work for 2021 will focus on communicating the “hidden” social justice issue of inequitable access to nature.

Caitlin DiCara and Marcia Shiffman at our Riverside Park (Piscataway) site

We talked with Marcia and Caitlin about social barriers and physical obstacles to enjoyment of blue or green spaces or parks. In preparation for our listening session on Social Justice and Access to Nature, we identified a number of barriers to accessing nature. All of the below we observe as issues at non-bathing public access beach pathogens monitoring sites. These include:

-Difficulty in accessing green/blue or park space because of landscape design

-Difficulty in accessing green/blue or park space because of cost

-Not feeling welcome in a natural blue/green space or park because of economic status, or ethnic or cultural difference

-Cultural and/or language restriction present other barriers to enjoyment of time in natural spaces

-Bullying behaviors or material obstacles limit enjoyment of time in natural spaces for persons with disabilities

-Fear, anxiety, or feelings of helplessness in the face of crime limits time in natural spaces

What obstacles or barriers have we missed?

Our Thursday “regulars” fishing at the Edison Boat Launch
Not much tugging at these poles, Edison Boat Launch 10.15.2020

City of Water Day on the Raritan!

On Saturday September 12, the Lower Raritan Watershed Partnership will join groups throughout the New York New Jersey Harbor Estuary in bringing attention to climate change and the resilient nature of our waterfront neighborhoods.

This year we focus on our New Brunswick, NJ community and landscape and will offer programming in New Brunswick’s waterfront Boyd Park from 9 am to 3 pm. Please join us!

In addition to appropriately social-distanced in-person activities, a portion of our programming for the day (from 11am – noon) will be shared virtually via Facebook live. Log-in details will be sent to those who preregister.

City of Water Day events in New Brunswick will include:

  1. #lookfortheriver: FRAMES sculpture installation – ENGLISH AND SPANISH (9am – 3pm)

Event participants will observe sculpture artist Tobiah Horton (Rubble R & D) during a “work day” as he installs a new sculpture #lookfortheriver: FRAME in New Brunswick’s Boyd Park Raritan River riverfront.

Participants will have a chance to speak with Toby and members of the LRWP board about flooding and resilience along the Raritan River, and about the #lookfortheriver: FRAMES project. New Brunswick’s Boyd Park floodplain suffers repeat flood inundation, and serves as a protective “sponge” for other parts of New Brunswick. The #lookfortheriver: FRAME sculpture tells the story of infrastructure that is at-risk of flood inundation due to climate change and sea level rise. The sculpture is a living symbol of how removal of structures (in this case a house) from our floodplains allows for ecological restoration and regeneration, and fosters resilience.

Participants will also learn how the FRAMES sculpture functions as a data gathering tool. Through repeat digital photography uploaded to social media, passersby participate in civic science data collection about sea level rise, land use change, and resilience. Data gathered will allow for prioritization of resilience and restoration planning.

2. Water quality monitoring demonstrations – ENGLISH AND SPANISH (9:30-10 am and 11-11:30 am)

The LRWP and EARTH Center of Middlesex County collect weekly samples of Raritan River water for analysis of disease-causing bacteria. We will provide demonstrations of these activities and information about our findings thus far. Learn how and why we do this work and how you can get involved!

3. Raritan River Resilience info sharing – ENGLISH AND SPANISH (9am – 3pm)

This will include discussion of the regional BlueLine Initiative, flood hazard mapping, New Brunswick’s Municipal Public Access Plan, South River Ecosystem restoration proposals, and discussion of the LRWP’s NJ DEP-funded regional resilience planning grant


LRWP @ Middlesex County Chapter of State Federation of Sportsmen’s Clubs

Calling all sportsmen and sportswomen!

The LRWP and the Middlesex County Chapter of the New Jersey State Federation of Sportsmen’s Clubs welcome you to join us at 7:30 pm on Wednesday March 4 for conversation about the environment, fish and wildlife in the Lower Raritan. The LRWP will share our presentation on the “Top 10 Issues in the Lower Raritan Watershed,” focusing on water quality concerns in particular.

Meeting location:

Polish American Citizen’s Club

66 Adirondack Avenue

Spotswood, NJ  08884

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